- /*
- * @(#)Component.java 1.239 01/11/29
- *
- * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
- * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
- */
- package java.awt;
-
- import java.io.PrintStream;
- import java.io.PrintWriter;
- import java.util.Vector;
- import java.util.Locale;
- import java.awt.peer.ComponentPeer;
- import java.awt.image.ImageObserver;
- import java.awt.image.ImageProducer;
- import java.awt.image.ColorModel;
- import java.awt.event.*;
- import java.awt.datatransfer.Transferable;
- import java.awt.dnd.DnDConstants;
- import java.awt.dnd.DragSource;
- import java.awt.dnd.DragSourceContext;
- import java.awt.dnd.DragSourceListener;
- import java.awt.dnd.InvalidDnDOperationException;
- import java.io.Serializable;
- import java.io.ObjectOutputStream;
- import java.io.ObjectInputStream;
- import java.io.IOException;
- import java.beans.PropertyChangeListener;
- import java.awt.event.InputMethodListener;
- import java.awt.event.InputMethodEvent;
- import java.awt.im.InputContext;
- import java.awt.im.InputMethodRequests;
- import java.awt.dnd.DropTarget;
-
- import sun.security.action.GetPropertyAction;
- import sun.awt.AppContext;
- import sun.awt.SunToolkit;
- import sun.awt.ConstrainableGraphics;
-
- /**
- * A <em>component</em> is an object having a graphical representation
- * that can be displayed on the screen and that can interact with the
- * user. Examples of components are the buttons, checkboxes, and scrollbars
- * of a typical graphical user interface. <p>
- * The <code>Component</code> class is the abstract superclass of
- * the nonmenu-related Abstract Window Toolkit components. Class
- * <code>Component</code> can also be extended directly to create a
- * lightweight component. A lightweight component is a component that is
- * not associated with a native opaque window.
- *
- * @version 1.226, 12/15/98
- * @author Arthur van Hoff
- * @author Sami Shaio
- */
- public abstract class Component implements ImageObserver, MenuContainer,
- Serializable
- {
- /**
- * The peer of the component. The peer implements the component's
- * behaviour. The peer is set when the Component is added to a
- * container that also is a peer.
- * @see #addNotify
- * @see #removeNotify
- */
- transient ComponentPeer peer;
-
- /**
- * The parent of the object. It may be null for top-level components.
- * @see #getParent
- */
- transient Container parent;
-
- /**
- * The AppContext of the component. This is set in the constructor
- * and never changes.
- */
- transient AppContext appContext;
-
- /**
- * The x position of the component in the parent's coordinate system.
- *
- * @serial
- * @see #getLocation
- */
- int x;
-
- /**
- * The y position of the component in the parent's coordinate system.
- *
- * @serial
- * @see #getLocation
- */
- int y;
-
- /**
- * The width of the component.
- *
- * @serial
- * @see #getSize
- */
- int width;
-
- /**
- * The height of the component.
- *
- * @serial
- * @see #getSize
- */
- int height;
-
- /**
- * The foreground color for this component.
- * foreground color can be null.
- *
- * @serial
- * @see #getForeground
- * @see #setForeground
- */
- Color foreground;
-
- /**
- * The background color for this component.
- * background can be null.
- *
- * @serial
- * @see #getBackground
- * @see #setBackground
- */
- Color background;
-
- /**
- * The font used by this component.
- * The font can be null.
- *
- * @serial
- * @see #getFont
- * @see #setFont
- */
- Font font;
-
- /**
- * The font which the peer is currently using. (null if no peer exists.)
- */
- Font peerFont;
-
- /**
- * The cursor displayed when pointer is over this component.
- * cursor must always be a non-null cursor image.
- *
- * @serial
- * @see #getCursor
- * @see #setCursor
- */
- Cursor cursor;
-
- /**
- * The locale for the component.
- *
- * @serial
- * @see #getLocale
- * @see #setLocale
- */
- Locale locale;
-
- /**
- * True when the object is visible. An object that is not
- * visible is not drawn on the screen.
- *
- * @serial
- * @see #isVisible
- * @see #setVisible
- */
- boolean visible = true;
-
- /**
- * True when the object is enabled. An object that is not
- * enabled does not interact with the user.
- *
- * @serial
- * @see #isEnabled
- * @see #setEnabled
- */
- boolean enabled = true;
-
- /**
- * True when the object is valid. An invalid object needs to
- * be layed out. This flag is set to false when the object
- * size is changed.
- *
- * @serial
- * @see #isValid
- * @see #validate
- * @see #invalidate
- */
- boolean valid = false;
-
- /**
- * The DropTarget associated with this Component.
- *
- * @since JDK 1.2
- * @serial
- * @see #setDropTarget
- * @see #getDropTarget
- */
- DropTarget dropTarget;
-
-
- /**
- * True if this component has enabled focus events and currently
- * has the focus.
- *
- * @serial
- * @see #hasFocus
- * @see #processFocusEvent
- */
- boolean hasFocus = false;
-
- /**
- * @serial
- * @see add()
- */
- Vector popups;
-
- /**
- * A components name.
- * This field can be null.
- *
- * @serial
- * @see getName()
- * @see setName()
- */
- private String name;
-
- /**
- * A bool to determine whether the name has
- * been set explicitly. nameExplicitlySet will
- * be false if the name has not been set and
- * true if it has.
- *
- * @serial
- * @see getName()
- * @see setName()
- */
- private boolean nameExplicitlySet = false;
-
- /**
- * The locking object for AWT component-tree and layout operations.
- *
- * @see #getTreeLock
- */
- static final Object LOCK = new AWTTreeLock();
- static class AWTTreeLock {}
-
- /**
- * Internal, cached size information.
- * (This field perhaps should have been transient).
- *
- * @serial
- */
- Dimension minSize;
-
- /** Internal, cached size information
- * (This field perhaps should have been transient).
- *
- * @serial
- */
- Dimension prefSize;
-
- /**
- * The orientation for this component.
- * @see #getComponentOrientation
- * @see #setComponentOrientation(java.awt.ComponentOrientation)
- */
- transient ComponentOrientation componentOrientation
- = ComponentOrientation.UNKNOWN;
-
- /**
- * newEventsOnly will be true if the event is
- * one of the event types enabled for the component.
- * It will then allow for normal processing to
- * continue. If it is false the event is passed
- * to the components parent and up the ancestor
- * tree until the event has been consumed.
- *
- * @serial
- * @see dispatchEvent()
- */
- boolean newEventsOnly = false;
- transient ComponentListener componentListener;
- transient FocusListener focusListener;
- transient KeyListener keyListener;
- transient MouseListener mouseListener;
- transient MouseMotionListener mouseMotionListener;
- transient InputMethodListener inputMethodListener;
-
- /** Internal, constants for serialization */
- final static String actionListenerK = "actionL";
- final static String adjustmentListenerK = "adjustmentL";
- final static String componentListenerK = "componentL";
- final static String containerListenerK = "containerL";
- final static String focusListenerK = "focusL";
- final static String itemListenerK = "itemL";
- final static String keyListenerK = "keyL";
- final static String mouseListenerK = "mouseL";
- final static String mouseMotionListenerK = "mouseMotionL";
- final static String textListenerK = "textL";
- final static String ownedWindowK = "ownedL";
- final static String windowListenerK = "windowL";
- final static String inputMethodListenerK = "inputMethodL";
-
- /**
- * The eventMask is ONLY set by subclasses via enableEvents.
- * The mask should NOT be set when listeners are registered
- * so that we can distinguish the difference between when
- * listeners request events and subclasses request them.
- * One bit is used to indicate whether input methods are
- * enabled; this bit is set by enableInputMethods and is
- * on by default.
- *
- * @serial
- * @see enableInputMethods()
- */
- long eventMask = AWTEvent.INPUT_METHODS_ENABLED_MASK;
-
- // enable for assertion checking
- private final static boolean assert = false;
-
- /**
- * Static properties for incremental drawing.
- * @see #imageUpdate
- */
- static boolean isInc;
- static int incRate;
- static {
- /* ensure that the necessary native libraries are loaded */
- Toolkit.loadLibraries();
- /* initialize JNI field and method ids */
- initIDs();
-
- String s = (String) java.security.AccessController.doPrivileged(
- new GetPropertyAction("awt.image.incrementaldraw"));
- isInc = (s == null || s.equals("true"));
-
- s = (String) java.security.AccessController.doPrivileged(
- new GetPropertyAction("awt.image.redrawrate"));
- incRate = (s != null) ? Integer.parseInt(s) : 100;
- }
-
- /**
- * Ease-of-use constant for <code>getAlignmentY()</code>. Specifies an
- * alignment to the top of the component.
- * @see #getAlignmentY
- */
- public static final float TOP_ALIGNMENT = 0.0f;
-
- /**
- * Ease-of-use constant for <code>getAlignmentY</code> and
- * <code>getAlignmentX</code>. Specifies an alignment to
- * the center of the component
- * @see #getAlignmentX
- * @see #getAlignmentY
- */
- public static final float CENTER_ALIGNMENT = 0.5f;
-
- /**
- * Ease-of-use constant for <code>getAlignmentY</code>. Specifies an
- * alignment to the bottom of the component.
- * @see #getAlignmentY
- */
- public static final float BOTTOM_ALIGNMENT = 1.0f;
-
- /**
- * Ease-of-use constant for <code>getAlignmentX</code>. Specifies an
- * alignment to the left side of the component.
- * @see #getAlignmentX
- */
- public static final float LEFT_ALIGNMENT = 0.0f;
-
- /**
- * Ease-of-use constant for <code>getAlignmentX</code>. Specifies an
- * alignment to the right side of the component.
- * @see #getAlignmentX
- */
- public static final float RIGHT_ALIGNMENT = 1.0f;
-
- /*
- * JDK 1.1 serialVersionUID
- */
- private static final long serialVersionUID = -7644114512714619750L;
-
- /**
- * If any PropertyChangeListeners have been registered, the
- * changeSupport field describes them.
- *
- * @serial
- * @since JDK 1.2
- * @see addPropertyChangeListener()
- * @see removePropertyChangeListener()
- * @see firePropertyChange()
- */
- private java.beans.PropertyChangeSupport changeSupport;
-
- boolean isPacked = false;
-
- /**
- * Constructs a new component. Class <code>Component</code> can be
- * extended directly to create a lightweight component that does not
- * utilize an opaque native window. A lightweight component must be
- * hosted by a native container somewhere higher up in the component
- * tree (for example, by a <code>Frame</code> object).
- */
- protected Component() {
- appContext = AppContext.getAppContext();
- SunToolkit.insertTargetMapping(this, appContext);
- }
-
- /**
- * Construct a name for this component. Called by getName() when the
- * name is null.
- */
- String constructComponentName() {
- return null; // For strict compliance with prior JDKs, a Component
- // that doesn't set its name should return null from
- // getName()
- }
-
- /**
- * Gets the name of the component.
- * @return This component's name.
- * @see #setName
- * @since JDK1.1
- */
- public String getName() {
- if (name == null && !nameExplicitlySet) {
- synchronized(this) {
- if (name == null && !nameExplicitlySet)
- name = constructComponentName();
- }
- }
- return name;
- }
-
- /**
- * Sets the name of the component to the specified string.
- * @param name The string that is to be this
- * component's name.
- * @see #getName
- * @since JDK1.1
- */
- public void setName(String name) {
- synchronized(this) {
- this.name = name;
- nameExplicitlySet = true;
- }
- }
-
- /**
- * Gets the parent of this component.
- * @return The parent container of this component.
- * @since JDK1.0
- */
- public Container getParent() {
- return getParent_NoClientCode();
- }
-
- // NOTE: This method may be called by privileged threads.
- // This functionality is implemented in a package-private method
- // to insure that it cannot be overridden by client subclasses.
- // DO NOT INVOKE CLIENT CODE ON THIS THREAD!
- final Container getParent_NoClientCode() {
- return parent;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * programs should not directly manipulate peers.
- * replaced by <code>boolean isDisplayable()</code>.
- */
- public ComponentPeer getPeer() {
- return peer;
- }
-
- /**
- * Associate a DropTarget with this Component.
- *
- * @param dt The DropTarget
- */
-
- public synchronized void setDropTarget(DropTarget dt) {
- if (dt == dropTarget || (dropTarget != null && dropTarget.equals(dt)))
- return;
-
- DropTarget old;
-
- if ((old = dropTarget) != null) {
- if (peer != null) dropTarget.removeNotify(peer);
-
- DropTarget t = dropTarget;
-
- dropTarget = null;
-
- try {
- t.setComponent(null);
- } catch (IllegalArgumentException iae) {
- // ignore it.
- }
- }
-
- // if we have a new one, and we have a peer, add it!
-
- if ((dropTarget = dt) != null) {
- try {
- dropTarget.setComponent(this);
- if (peer != null) dropTarget.addNotify(peer);
- } catch (IllegalArgumentException iae) {
- if (old != null) {
- try {
- old.setComponent(this);
- if (peer != null) dropTarget.addNotify(peer);
- } catch (IllegalArgumentException iae1) {
- // ignore it!
- }
- }
- }
- }
- }
-
- /**
- * Get the DropTarget associated with this Component
- */
-
- public synchronized DropTarget getDropTarget() { return dropTarget; }
-
- /**
- * Gets the locking object for AWT component-tree and layout
- * Gets this component's locking object (the object that owns the thread
- * sychronization monitor) for AWT component-tree and layout
- * operations.
- * @return This component's locking object.
- */
- public final Object getTreeLock() {
- return LOCK;
- }
-
- /**
- * Gets the toolkit of this component. Note that
- * the frame that contains a component controls which
- * toolkit is used by that component. Therefore if the component
- * is moved from one frame to another, the toolkit it uses may change.
- * @return The toolkit of this component.
- * @since JDK1.0
- */
- public Toolkit getToolkit() {
- return getToolkitImpl();
- }
-
- /*
- * This is called by the native code, so client code can't
- * be called on the toolkit thread.
- */
- final Toolkit getToolkitImpl() {
- ComponentPeer peer = this.peer;
- if ((peer != null) && ! (peer instanceof java.awt.peer.LightweightPeer)){
- return peer.getToolkit();
- }
- Container parent = this.parent;
- if (parent != null) {
- return parent.getToolkitImpl();
- }
- return Toolkit.getDefaultToolkit();
- }
-
- /**
- * Determines whether this component is valid. A component is valid
- * when it is correctly sized and positioned within its parent
- * container and all its children are also valid. Components are
- * invalidated when they are first shown on the screen.
- * @return <code>true</code> if the component is valid; <code>false</code>
- * otherwise.
- * @see #validate
- * @see #invalidate
- * @since JDK1.0
- */
- public boolean isValid() {
- return (peer != null) && valid;
- }
-
- /**
- * Determines whether this component is displayable. A component is
- * displayable when it is connected to a native screen resource.
- * <p>
- * A component is made displayable either when it is added to
- * a displayable containment hierarchy or when its containment
- * hierarchy is made displayable.
- * A containment hierarchy is made displayable when its ancestor
- * window is either packed or made visible.
- * <p>
- * A component is made undisplayable either when it is removed from
- * a displayable containment hierarchy or when its containment hierarchy
- * is made undisplayable. A containment hierarchy is made
- * undisplayable when its ancestor window is disposed.
- *
- * @return <code>true</code> if the component is displayable;
- * <code>false</code> otherwise.
- * @see java.awt.Container#add(java.awt.Component)
- * @see java.awt.Window#pack
- * @see java.awt.Window#show
- * @see java.awt.Container#remove(java.awt.Component)
- * @see java.awt.Window#dispose
- * @since JDK1.2
- */
- public boolean isDisplayable() {
- return getPeer() != null;
- }
-
- /**
- * Determines whether this component should be visible when its
- * parent is visible. Components are
- * initially visible, with the exception of top level components such
- * as <code>Frame</code> objects.
- * @return <code>true</code> if the component is visible;
- * <code>false</code> otherwise.
- * @see #setVisible
- * @since JDK1.0
- */
- public boolean isVisible() {
- return visible;
- }
-
- /**
- * Determines whether this component is showing on screen. This means
- * that the component must be visible, and it must be in a container
- * that is visible and showing.
- * @return <code>true</code> if the component is showing;
- * <code>false</code> otherwise.
- * @see #setVisible
- * @since JDK1.0
- */
- public boolean isShowing() {
- if (visible && (peer != null)) {
- Container parent = this.parent;
- return (parent == null) || parent.isShowing();
- }
- return false;
- }
-
- /**
- * Determines whether this component is enabled. An enabled component
- * can respond to user input and generate events. Components are
- * enabled initially by default. A component may be enabled or disabled by
- * calling its <code>setEnabled</code> method.
- * @return <code>true</code> if the component is enabled;
- * <code>false</code> otherwise.
- * @see #setEnabled
- * @since JDK1.0
- */
- public boolean isEnabled() {
- return isEnabledImpl();
- }
-
- /*
- * This is called by the native code, so client code can't
- * be called on the toolkit thread.
- */
- final boolean isEnabledImpl() {
- return enabled;
- }
-
- /**
- * Enables or disables this component, depending on the value of the
- * parameter <code>b</code>. An enabled component can respond to user
- * input and generate events. Components are enabled initially by default.
- * @param b If <code>true</code>, this component is
- * enabled; otherwise this component is disabled.
- * @see #isEnabled
- * @since JDK1.1
- */
- public void setEnabled(boolean b) {
- enable(b);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setEnabled(boolean)</code>.
- */
- public void enable() {
- if (enabled != true) {
- synchronized (getTreeLock()) {
- enabled = true;
- ComponentPeer peer = this.peer;
- if (peer != null) {
- peer.enable();
- }
- }
- }
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setEnabled(boolean)</code>.
- */
- public void enable(boolean b) {
- if (b) {
- enable();
- } else {
- disable();
- }
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setEnabled(boolean)</code>.
- */
- public void disable() {
- if (enabled != false) {
- synchronized (getTreeLock()) {
- enabled = false;
- ComponentPeer peer = this.peer;
- if (peer != null) {
- peer.disable();
- }
- }
- }
- }
-
- /**
- * Returns true if this component is painted to an offscreen image
- * ("buffer") that's copied to the screen later. Component
- * subclasses that support double buffering should override this
- * method to return true if double buffering is enabled.
- *
- * @return false by default
- */
- public boolean isDoubleBuffered() {
- return false;
- }
-
- /**
- * Enables or disables input method support for this component. If input
- * method support is enabled and the component also processes key events,
- * incoming events are offered to
- * the current input method and will only be processed by the component or
- * dispatched to its listeners if the input method does not consume them.
- * By default, input method support is enabled.
- *
- * @param enable true to enable, false to disable.
- * @see java.awt.Component#processKeyEvent
- * @since JDK1.2
- */
- public void enableInputMethods(boolean enable) {
- if (enable) {
- if ((eventMask & AWTEvent.INPUT_METHODS_ENABLED_MASK) != 0)
- return;
-
- // If this component already has focus, then activate the
- // input method by dispatching a synthesized focus gained
- // event.
- if (hasFocus() == true) {
- InputContext inputContext = getInputContext();
- if (inputContext != null) {
- FocusEvent focusGainedEvent = new FocusEvent(this,
- FocusEvent.FOCUS_GAINED);
- inputContext.dispatchEvent(focusGainedEvent);
- }
- }
-
- eventMask |= AWTEvent.INPUT_METHODS_ENABLED_MASK;
- } else {
- if (areInputMethodsEnabled()) {
- InputContext inputContext = getInputContext();
- if (inputContext != null) {
- inputContext.endComposition();
- inputContext.removeNotify(this);
- }
- }
- eventMask &= ~AWTEvent.INPUT_METHODS_ENABLED_MASK;
- }
- }
-
- /**
- * Shows or hides this component depending on the value of parameter
- * <code>b</code>.
- * @param b If <code>true</code>, shows this component;
- * otherwise, hides this component.
- * @see #isVisible
- * @since JDK1.1
- */
- public void setVisible(boolean b) {
- show(b);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setVisible(boolean)</code>.
- */
- public void show() {
- if (visible != true) {
- synchronized (getTreeLock()) {
- visible = true;
- ComponentPeer peer = this.peer;
- if (peer != null) {
- peer.show();
- if (peer instanceof java.awt.peer.LightweightPeer) {
- repaint();
- }
- }
- if (componentListener != null ||
- (eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0) {
- ComponentEvent e = new ComponentEvent(this,
- ComponentEvent.COMPONENT_SHOWN);
- Toolkit.getEventQueue().postEvent(e);
- }
- }
- Container parent = this.parent;
- if (parent != null) {
- parent.invalidate();
- }
- }
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setVisible(boolean)</code>.
- */
- public void show(boolean b) {
- if (b) {
- show();
- } else {
- hide();
- }
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setVisible(boolean)</code>.
- */
- public void hide() {
- if (visible != false) {
- synchronized (getTreeLock()) {
- visible = false;
- ComponentPeer peer = this.peer;
- if (peer != null) {
- peer.hide();
- if (peer instanceof java.awt.peer.LightweightPeer) {
- repaint();
- }
- }
- if (componentListener != null ||
- (eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0) {
- ComponentEvent e = new ComponentEvent(this,
- ComponentEvent.COMPONENT_HIDDEN);
- Toolkit.getEventQueue().postEvent(e);
- }
- }
- Container parent = this.parent;
- if (parent != null) {
- parent.invalidate();
- }
- }
- }
-
- /**
- * Gets the foreground color of this component.
- * @return This component's foreground color. If this component does
- * not have a foreground color, the foreground color of its parent
- * is returned.
- * @see #java.awt.Component#setForeground(java.awt.Color)
- * @since JDK1.0
- */
- public Color getForeground() {
- Color foreground = this.foreground;
- if (foreground != null) {
- return foreground;
- }
- Container parent = this.parent;
- return (parent != null) ? parent.getForeground() : null;
- }
-
- /**
- * Sets the foreground color of this component.
- * @param c The color to become this component's
- * foreground color.
- * If this parameter is null then this component will inherit
- * the foreground color of its parent.
- * @see #getForeground
- * @since JDK1.0
- */
- public void setForeground(Color c) {
- Color oldColor = foreground;
- ComponentPeer peer = this.peer;
- foreground = c;
- if (peer != null) {
- c = getForeground();
- if (c != null) {
- peer.setForeground(c);
- }
- }
- // This is a bound property, so report the change to
- // any registered listeners. (Cheap if there are none.)
- firePropertyChange("foreground", oldColor, c);
- }
-
- /**
- * Gets the background color of this component.
- * @return This component's background color. If this component does
- * not have a background color, the background color of its parent
- * is returned.
- * @see java.awt.Component#setBackground(java.awt.Color)
- * @since JDK1.0
- */
- public Color getBackground() {
- Color background = this.background;
- if (background != null) {
- return background;
- }
- Container parent = this.parent;
- return (parent != null) ? parent.getBackground() : null;
- }
-
- /**
- * Sets the background color of this component.
- * @param c The color to become this component's color.
- * If this parameter is null then this component will inherit
- * the background color of its parent.
- * background color.
- * @see #getBackground
- * @since JDK1.0
- */
- public void setBackground(Color c) {
- Color oldColor = background;
- ComponentPeer peer = this.peer;
- background = c;
- if (peer != null) {
- c = getBackground();
- if (c != null) {
- peer.setBackground(c);
- }
- }
- // This is a bound property, so report the change to
- // any registered listeners. (Cheap if there are none.)
- firePropertyChange("background", oldColor, c);
- }
-
- /**
- * Gets the font of this component.
- * @return This component's font. If a font has not been set
- * for this component, the font of its parent is returned.
- * @see #setFont
- * @since JDK1.0
- */
- public Font getFont() {
- Font font = this.font;
- if (font != null) {
- return font;
- }
- Container parent = this.parent;
- return (parent != null) ? parent.getFont() : null;
- }
-
- // NOTE: This method may be called by privileged threads.
- // This functionality is implemented in a package-private method
- // to insure that it cannot be overridden by client subclasses.
- // DO NOT INVOKE CLIENT CODE ON THIS THREAD!
- final Font getFont_NoClientCode() {
- Font font = this.font;
- if (font != null) {
- return font;
- }
- Container parent = this.parent;
- return (parent != null) ? parent.getFont_NoClientCode() : null;
- }
-
- /**
- * Sets the font of this component.
- * @param f The font to become this component's font.
- * If this parameter is null then this component will inherit
- * the font of its parent.
- * @see #getFont
- * @since JDK1.0
- */
- public void setFont(Font f) {
- synchronized (this) {
- Font oldFont = font;
- ComponentPeer peer = this.peer;
- font = f;
- if (peer != null) {
- f = getFont();
- if (f != null) {
- peer.setFont(f);
- peerFont = f;
- }
- }
- // This is a bound property, so report the change to
- // any registered listeners. (Cheap if there are none.)
- firePropertyChange("font", oldFont, font);
- }
-
- // This could change the preferred size of the Component.
- if (valid) {
- invalidate();
- }
- }
-
- /**
- * Gets the locale of this component.
- * @return This component's locale. If this component does not
- * have a locale, the locale of its parent is returned.
- * @see #setLocale
- * @exception IllegalComponentStateException If the Component
- * does not have its own locale and has not yet been added to
- * a containment hierarchy such that the locale can be determined
- * from the containing parent.
- * @since JDK1.1
- */
- public Locale getLocale() {
- Locale locale = this.locale;
- if (locale != null) {
- return locale;
- }
- Container parent = this.parent;
-
- if (parent == null) {
- throw new IllegalComponentStateException("This component must have a parent in order to determine its locale");
- } else {
- return parent.getLocale();
- }
- }
-
- /**
- * Sets the locale of this component.
- * @param l The locale to become this component's locale.
- * @see #getLocale
- * @since JDK1.1
- */
- public void setLocale(Locale l) {
- locale = l;
-
- // This could change the preferred size of the Component.
- if (valid) {
- invalidate();
- }
- }
-
- /**
- * Gets the instance of <code>ColorModel</code> used to display
- * the component on the output device.
- * @return The color model used by this component.
- * @see java.awt.image.ColorModel
- * @see java.awt.peer.ComponentPeer#getColorModel()
- * @see java.awt.Toolkit#getColorModel()
- * @since JDK1.0
- */
- public ColorModel getColorModel() {
- ComponentPeer peer = this.peer;
- if ((peer != null) && ! (peer instanceof java.awt.peer.LightweightPeer)) {
- return peer.getColorModel();
- }
- return getToolkit().getColorModel();
- }
-
- /**
- * Gets the location of this component in the form of a
- * point specifying the component's top-left corner.
- * The location will be relative to the parent's coordinate space.
- * @return An instance of <code>Point</code> representing
- * the top-left corner of the component's bounds in the coordinate
- * space of the component's parent.
- * @see #setLocation
- * @see #getLocationOnScreen
- * @since JDK1.1
- */
- public Point getLocation() {
- return location();
- }
-
- /**
- * Gets the location of this component in the form of a point
- * specifying the component's top-left corner in the screen's
- * coordinate space.
- * @return An instance of <code>Point</code> representing
- * the top-left corner of the component's bounds in the
- * coordinate space of the screen.
- * @see #setLocation
- * @see #getLocation
- */
- public Point getLocationOnScreen() {
- synchronized (getTreeLock()) {
- if (peer != null && isShowing()) {
- if (peer instanceof java.awt.peer.LightweightPeer) {
- // lightweight component location needs to be translated
- // relative to a native component.
- Container host = getNativeContainer();
- Point pt = host.peer.getLocationOnScreen();
- for(Component c = this; c != host; c = c.getParent()) {
- pt.x += c.x;
- pt.y += c.y;
- }
- return pt;
- } else {
- Point pt = peer.getLocationOnScreen();
- return pt;
- }
- } else {
- throw new IllegalComponentStateException("component must be showing on the screen to determine its location");
- }
- }
- }
-
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>getLocation()</code>.
- */
- public Point location() {
- return new Point(x, y);
- }
-
- /**
- * Moves this component to a new location. The top-left corner of
- * the new location is specified by the <code>x</code> and <code>y</code>
- * parameters in the coordinate space of this component's parent.
- * @param x The <i>x</i>-coordinate of the new location's
- * top-left corner in the parent's coordinate space.
- * @param y The <i>y</i>-coordinate of the new location's
- * top-left corner in the parent's coordinate space.
- * @see #getLocation
- * @see #setBounds
- * @since JDK1.1
- */
- public void setLocation(int x, int y) {
- move(x, y);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setLocation(int, int)</code>.
- */
- public void move(int x, int y) {
- setBounds(x, y, width, height);
- }
-
- /**
- * Moves this component to a new location. The top-left corner of
- * the new location is specified by point <code>p</code>. Point
- * <code>p</code> is given in the parent's coordinate space.
- * @param p The point defining the top-left corner
- * of the new location, given in the coordinate space of this
- * component's parent.
- * @see #getLocation
- * @see #setBounds
- * @since JDK1.1
- */
- public void setLocation(Point p) {
- setLocation(p.x, p.y);
- }
-
- /**
- * Returns the size of this component in the form of a
- * <code>Dimension</code> object. The <code>height</code>
- * field of the <code>Dimension</code> object contains
- * this component's height, and the <code>width</code>
- * field of the <code>Dimension</code> object contains
- * this component's width.
- * @return A <code>Dimension</code> object that indicates the
- * size of this component.
- * @see #setSize
- * @since JDK1.1
- */
- public Dimension getSize() {
- return size();
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>getSize()</code>.
- */
- public Dimension size() {
- return new Dimension(width, height);
- }
-
- /**
- * Resizes this component so that it has width <code>width</code>
- * and <code>height</code>.
- * @param width The new width of this component in pixels.
- * @param height The new height of this component in pixels.
- * @see #getSize
- * @see #setBounds
- * @since JDK1.1
- */
- public void setSize(int width, int height) {
- resize(width, height);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setSize(int, int)</code>.
- */
- public void resize(int width, int height) {
- setBounds(x, y, width, height);
- }
-
- /**
- * Resizes this component so that it has width <code>d.width</code>
- * and height <code>d.height</code>.
- * @param d The dimension specifying the new size
- * of this component.
- * @see #setSize
- * @see #setBounds
- * @since JDK1.1
- */
- public void setSize(Dimension d) {
- resize(d);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setSize(Dimension)</code>.
- */
- public void resize(Dimension d) {
- setSize(d.width, d.height);
- }
-
- /**
- * Gets the bounds of this component in the form of a
- * <code>Rectangle</code> object. The bounds specify this
- * component's width, height, and location relative to
- * its parent.
- * @return A rectangle indicating this component's bounds.
- * @see #setBounds
- * @see #getLocation
- * @see #getSize
- */
- public Rectangle getBounds() {
- return bounds();
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>getBounds()</code>.
- */
- public Rectangle bounds() {
- return new Rectangle(x, y, width, height);
- }
-
- /**
- * Moves and resizes this component. The new location of the top-left
- * corner is specified by <code>x</code> and <code>y</code>, and the
- * new size is specified by <code>width</code> and <code>height</code>.
- * @param x The new <i>x</i>-coordinate of this component.
- * @param y The new <i>y</i>-coordinate of this component.
- * @param width The new <code>width</code> of this component.
- * @param height The new <code>height</code> of this
- * component.
- * @see java.awt.Component#getBounds
- * @see java.awt.Component#setLocation(int, int)
- * @see java.awt.Component#setLocation(java.awt.Point)
- * @see java.awt.Component#setSize(int, int)
- * @see java.awt.Component#setSize(java.awt.Dimension)
- * @JDK1.1
- */
- public void setBounds(int x, int y, int width, int height) {
- reshape(x, y, width, height);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>setBounds(int, int, int, int)</code>.
- */
- public void reshape(int x, int y, int width, int height) {
- synchronized (getTreeLock()) {
- boolean resized = (this.width != width) || (this.height != height);
- boolean moved = (this.x != x) || (this.y != y);
- boolean isLightweight = peer instanceof java.awt.peer.LightweightPeer;
-
- if (resized) {
- isPacked = false;
- }
- if (resized || moved) {
- if (isLightweight && visible) {
- // Have the parent redraw the area this component occupied.
- repaint();
- }
- this.x = x;
- this.y = y;
- this.width = width;
- this.height = height;
- if (peer != null) {
- if (isLightweight) {
- peer.setBounds(x, y, width, height);
- } else {
- // native peer might be offset by more than direct
- // parent since parent might be lightweight.
- int nativeX = x;
- int nativeY = y;
- for(Component c = parent; (c != null) &&
- (c.peer instanceof java.awt.peer.LightweightPeer);
- c = c.parent) {
-
- nativeX += c.x;
- nativeY += c.y;
- }
- peer.setBounds(nativeX, nativeY, width, height);
- }
- if (resized) {
- invalidate();
-
- if (componentListener != null ||
- (eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0) {
- ComponentEvent e = new ComponentEvent(this,
- ComponentEvent.COMPONENT_RESIZED);
- Toolkit.getEventQueue().postEvent(e);
- }
- }
- if (moved &&
- (componentListener != null ||
- (eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0)) {
- ComponentEvent e = new ComponentEvent(this,
- ComponentEvent.COMPONENT_MOVED);
- Toolkit.getEventQueue().postEvent(e);
- }
- if (parent != null && parent.valid) {
- parent.invalidate();
- }
- }
- if (isLightweight && visible) {
- // Have the parent redraw the area this component *now* occupies.
- repaint();
- }
- }
- }
- }
-
- /**
- * Moves and resizes this component to conform to the new
- * bounding rectangle <code>r</code>. This component's new
- * position is specified by <code>r.x</code> and <code>r.y</code>,
- * and its new size is specified by <code>r.width</code> and
- * <code>r.height</code>
- * @param r The new bounding rectangle for this component.
- * @see java.awt.Component#getBounds
- * @see java.awt.Component#setLocation(int, int)
- * @see java.awt.Component#setLocation(java.awt.Point)
- * @see java.awt.Component#setSize(int, int)
- * @see java.awt.Component#setSize(java.awt.Dimension)
- * @since JDK1.1
- */
- public void setBounds(Rectangle r) {
- setBounds(r.x, r.y, r.width, r.height);
- }
-
-
- /**
- * Return the current x coordinate of the components origin.
- * This method is preferable to writing component.getBounds().x,
- * or component.getLocation().x because it doesn't cause any
- * heap allocations.
- *
- * @return the current x coordinate of the components origin.
- * @since JDK1.2
- */
- public int getX() {
- return x;
- }
-
-
- /**
- * Return the current y coordinate of the components origin.
- * This method is preferable to writing component.getBounds().y,
- * or component.getLocation().y because it doesn't cause any
- * heap allocations.
- *
- * @return the current y coordinate of the components origin.
- * @since JDK1.2
- */
- public int getY() {
- return y;
- }
-
-
- /**
- * Return the current width of this component.
- * This method is preferable to writing component.getBounds().width,
- * or component.getSize().width because it doesn't cause any
- * heap allocations.
- *
- * @return the current width of this component.
- * @since JDK1.2
- */
- public int getWidth() {
- return width;
- }
-
-
- /**
- * Return the current height of this component.
- * This method is preferable to writing component.getBounds().height,
- * or component.getSize().height because it doesn't cause any
- * heap allocations.
- *
- * @return the current height of this component.
- * @since JDK1.2
- */
- public int getHeight() {
- return height;
- }
-
- /**
- * Store the bounds of this component into "return value" <b>rv</b> and
- * return <b>rv</b>. If rv is null a new Rectangle is allocated.
- * This version of getBounds() is useful if the caller
- * wants to avoid allocating a new Rectangle object on the heap.
- *
- * @param rv the return value, modified to the components bounds
- * @return rv
- */
- public Rectangle getBounds(Rectangle rv) {
- if (rv == null) {
- return new Rectangle(getX(), getY(), getWidth(), getHeight());
- }
- else {
- rv.setBounds(getX(), getY(), getWidth(), getHeight());
- return rv;
- }
- }
-
- /**
- * Store the width/height of this component into "return value" <b>rv</b>
- * and return <b>rv</b>. If rv is null a new Dimension object is
- * allocated. This version of getSize() is useful if the
- * caller wants to avoid allocating a new Dimension object on the heap.
- *
- * @param rv the return value, modified to the components size
- * @return rv
- */
- public Dimension getSize(Dimension rv) {
- if (rv == null) {
- return new Dimension(getWidth(), getHeight());
- }
- else {
- rv.setSize(getWidth(), getHeight());
- return rv;
- }
- }
-
- /**
- * Store the x,y origin of this component into "return value" <b>rv</b>
- * and return <b>rv</b>. If rv is null a new Point is allocated.
- * This version of getLocation() is useful if the
- * caller wants to avoid allocating a new Point object on the heap.
- *
- * @param rv the return value, modified to the components location
- * @return rv
- */
- public Point getLocation(Point rv) {
- if (rv == null) {
- return new Point(getX(), getY());
- }
- else {
- rv.setLocation(getX(), getY());
- return rv;
- }
- }
-
- /**
- * Returns true if this component is completely opaque, returns
- * false by default.
- * <p>
- * An opaque component paints every pixel within its
- * rectangular region. A non-opaque component paints only some of
- * its pixels, allowing the pixels underneath it to "show through".
- * A component that does not fully paint its pixels therefore
- * provides a degree of transparency. Only lightweight
- * components can be transparent.
- * <p>
- * Subclasses that guarantee to always completely paint their
- * contents should override this method and return true. All
- * of the "heavyweight" AWT components are opaque.
- *
- * @return true if this component is completely opaque.
- * @see #isLightweight
- * @since JDK1.2
- */
- public boolean isOpaque() {
- return !isLightweight();
- }
-
-
- /**
- * A lightweight component doesn't have a native toolkit peer.
- * Subclasses of Component and Container, other than the ones
- * defined in this package like Button or Scrollbar, are lightweight.
- * All of the Swing components are lightweights.
- *
- * @return true if this component doesn't have a native peer
- * @since JDK1.2
- */
- public boolean isLightweight() {
- return getPeer() instanceof java.awt.peer.LightweightPeer;
- }
-
-
- /**
- * Gets the preferred size of this component.
- * @return A dimension object indicating this component's preferred size.
- * @see #getMinimumSize
- * @see java.awt.LayoutManager
- */
- public Dimension getPreferredSize() {
- return preferredSize();
- }
-
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>getPreferredSize()</code>.
- */
- public Dimension preferredSize() {
- /* Avoid grabbing the lock if a reasonable cached size value
- * is available.
- */
-
- Dimension dim = prefSize;
- if (dim != null && isValid()) {
- return dim;
- }
-
- synchronized (getTreeLock()) {
- prefSize = (peer != null) ?
- peer.preferredSize() :
- getMinimumSize();
- return prefSize;
- }
- }
-
- /**
- * Gets the mininimum size of this component.
- * @return A dimension object indicating this component's minimum size.
- * @see #getPreferredSize
- * @see java.awtLayoutManager
- */
- public Dimension getMinimumSize() {
- return minimumSize();
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>getMinimumSize()</code>.
- */
- public Dimension minimumSize() {
- /* Avoid grabbing the lock if a reasonable cached size value
- * is available.
- */
- Dimension dim = minSize;
- if (dim != null && isValid()) {
- return dim;
- }
- synchronized (getTreeLock()) {
- minSize = (peer != null) ?
- peer.minimumSize() :
- size();
- return minSize;
- }
- }
-
- /**
- * Gets the maximum size of this component.
- * @return A dimension object indicating this component's maximum size.
- * @see #getMinimumSize
- * @see #getPreferredSize
- * @see LayoutManager
- */
- public Dimension getMaximumSize() {
- return new Dimension(Short.MAX_VALUE, Short.MAX_VALUE);
- }
-
- /**
- * Returns the alignment along the x axis. This specifies how
- * the component would like to be aligned relative to other
- * components. The value should be a number between 0 and 1
- * where 0 represents alignment along the origin, 1 is aligned
- * the furthest away from the origin, 0.5 is centered, etc.
- */
- public float getAlignmentX() {
- return CENTER_ALIGNMENT;
- }
-
- /**
- * Returns the alignment along the y axis. This specifies how
- * the component would like to be aligned relative to other
- * components. The value should be a number between 0 and 1
- * where 0 represents alignment along the origin, 1 is aligned
- * the furthest away from the origin, 0.5 is centered, etc.
- */
- public float getAlignmentY() {
- return CENTER_ALIGNMENT;
- }
-
- /**
- * Prompts the layout manager to lay out this component. This is
- * usually called when the component (more specifically, container)
- * is validated.
- * @see #validate
- * @see LayoutManager
- */
- public void doLayout() {
- layout();
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>doLayout()</code>.
- */
- public void layout() {
- }
-
- /**
- * Ensures that this component has a valid layout. This method is
- * primarily intended to operate on instances of <code>Container</code>.
- * @see java.awt.Component#invalidate
- * @see java.awt.Component#doLayout()
- * @see java.awt.LayoutManager
- * @see java.awt.Container#validate
- * @since JDK1.0
- */
- public void validate() {
- if (!valid) {
- synchronized (getTreeLock()) {
- ComponentPeer peer = this.peer;
- if (!valid && peer != null) {
- Font newfont = getFont();
- Font oldfont = peerFont;
- if (newfont != oldfont && (oldfont == null
- || !oldfont.equals(newfont))) {
- peer.setFont(newfont);
- peerFont = newfont;
- }
- }
- }
- valid = true;
- }
- }
-
- /**
- * Invalidates this component. This component and all parents
- * above it are marked as needing to be laid out. This method can
- * be called often, so it needs to execute quickly.
- * @see java.awt.Component#validate
- * @see java.awt.Component#doLayout
- * @see java.awt.LayoutManager
- * @since JDK1.0
- */
- public void invalidate() {
- synchronized (getTreeLock()) {
- /* Nullify cached layout and size information.
- * For efficiency, propagate invalidate() upwards only if
- * some other component hasn't already done so first.
- */
- valid = false;
- prefSize = null;
- minSize = null;
- if (parent != null && parent.valid) {
- parent.invalidate();
- }
- }
- }
-
- /**
- * Creates a graphics context for this component. This method will
- * return <code>null</code> if this component is currently not on
- * the screen.
- * @return A graphics context for this component, or <code>null</code>
- * if it has none.
- * @see java.awt.Component#paint
- * @since JDK1.0
- */
- public Graphics getGraphics() {
- if (peer instanceof java.awt.peer.LightweightPeer) {
- // This is for a lightweight component, need to
- // translate coordinate spaces and clip relative
- // to the parent.
- Graphics g = parent.getGraphics();
- if (g instanceof ConstrainableGraphics) {
- ((ConstrainableGraphics) g).constrain(x, y, width, height);
- } else {
- g.translate(x,y);
- g.setClip(0, 0, width, height);
- }
- g.setFont(getFont());
- return g;
- } else {
- ComponentPeer peer = this.peer;
- return (peer != null) ? peer.getGraphics() : null;
- }
- }
-
- /**
- * Gets the font metrics for the specified font.
- * @param font The font for which font metrics is to be
- * obtained.
- * @return The font metrics for <code>font</code>.
- * @param font the font.
- * @return the font metrics for the specified font.
- * @see java.awt.Component#getFont
- * @see java.awt.Component#getPeer()
- * @see java.awt.peer.ComponentPeer#getFontMetrics(java.awt.Font)
- * @see java.awt.Toolkit#getFontMetrics(java.awt.Font)
- * @since JDK1.0
- */
- public FontMetrics getFontMetrics(Font font) {
- if (sun.java2d.loops.RasterOutputManager.usesPlatformFont()) {
- if (peer != null &&
- !(peer instanceof java.awt.peer.LightweightPeer)) {
- return peer.getFontMetrics(font);
- }
- }
- if (parent != null) {
- Graphics g = parent.getGraphics();
- if (g != null) {
- return g.getFontMetrics(font);
- }
- }
-
- return getToolkit().getFontMetrics(font);
- }
-
- /**
- * Sets the cursor image to the specified cursor. This cursor
- * image is displayed when the <code>contains</code> method for
- * this component returns true for the current cursor location.
- * Setting the cursor of a <code>Container</code> causes that cursor
- * to be displayed within all of the container's subcomponents,
- * except for those that have a non-null cursor.
- *
- * @param cursor One of the constants defined
- * by the <code>Cursor</code> class.
- * If this parameter is null then this component will inherit
- * the cursor of its parent.
- * @see java.awt.Component#getCursor
- * @see java.awt.Component#contains
- * @see java.awt.Toolkit#createCustomCursor
- * @see java.awt.Cursor
- * @since JDK1.1
- */
- public synchronized void setCursor(Cursor cursor) {
- this.cursor = cursor;
- ComponentPeer peer = this.peer;
- if (peer instanceof java.awt.peer.LightweightPeer) {
- getNativeContainer().updateCursor(this);
- } else if (peer != null) {
- peer.setCursor(cursor);
- }
- }
-
- /**
- * Gets the cursor set in the component. If the component does
- * not have a cursor set, the cursor of its parent is returned.
- * If no Cursor is set in the entire hierarchy, Cursor.DEFAULT_CURSOR is
- * returned.
- * @see #setCursor
- * @since JDK1.1
- */
- public Cursor getCursor() {
- Cursor cursor = this.cursor;
- if (cursor != null) {
- return cursor;
- }
- Container parent = this.parent;
- if (parent != null) {
- return parent.getCursor();
- } else {
- return Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
- }
- }
-
- Cursor getIntrinsicCursor() {
- return cursor;
- }
-
- /**
- * Paints this component. This method is called when the contents
- * of the component should be painted in response to the component
- * first being shown or damage needing repair. The clip rectangle
- * in the Graphics parameter will be set to the area which needs
- * to be painted.
- * @param g The graphics context to use for painting.
- * @see java.awt.Component#update
- * @since JDK1.0
- */
- public void paint(Graphics g) {
- }
-
- /**
- * Updates this component.
- * <p>
- * The AWT calls the <code>update</code> method in response to a
- * call to <code>repaint</code. The appearance of the
- * component on the screen has not changed since the last call to
- * <code>update</code> or <code>paint</code>. You can assume that
- * the background is not cleared.
- * <p>
- * The <code>update</code>method of <code>Component</code>
- * does the following:
- * <p>
- * <blockquote><ul>
- * <li>Clears this component by filling it
- * with the background color.
- * <li>Sets the color of the graphics context to be
- * the foreground color of this component.
- * <li>Calls this component's <code>paint</code>
- * method to completely redraw this component.
- * </ul></blockquote>
- * <p>
- * The origin of the graphics context, its
- * (<code>0</code>, <code>0</code>) coordinate point, is the
- * top-left corner of this component. The clipping region of the
- * graphics context is the bounding rectangle of this component.
- * @param g the specified context to use for updating.
- * @see java.awt.Component#paint
- * @see java.awt.Component#repaint()
- * @since JDK1.0
- */
- public void update(Graphics g) {
- if ((this instanceof java.awt.Canvas) ||
- (this instanceof java.awt.Panel) ||
- (this instanceof java.awt.Frame) ||
- (this instanceof java.awt.Dialog) ||
- (this instanceof java.awt.Window)) {
-
- g.clearRect(0, 0, width, height);
- }
- paint(g);
- }
-
- /**
- * Paints this component and all of its subcomponents.
- * <p>
- * The origin of the graphics context, its
- * (<code>0</code>, <code>0</code>) coordinate point, is the
- * top-left corner of this component. The clipping region of the
- * graphics context is the bounding rectangle of this component.
- * @param g the graphics context to use for painting.
- * @see java.awt.Component#paint
- * @since JDK1.0
- */
- public void paintAll(Graphics g) {
- ComponentPeer peer = this.peer;
- if (visible && (peer != null)) {
- validate();
- if (peer instanceof java.awt.peer.LightweightPeer) {
- paint(g);
- } else {
- peer.paint(g);
- }
- }
- }
-
- /**
- * Repaints this component.
- * <p>
- * This method causes a call to this component's <code>update</code>
- * method as soon as possible.
- * @see java.awt.Component#update(java.awt.Graphics)
- * @since JDK1.0
- */
- public void repaint() {
- /*
- getToolkit().getEventQueue().removeSourceEvents(this, PaintEvent.PAINT);
- */
- repaint(0, 0, 0, width, height);
- }
-
- /**
- * Repaints the component. This will result in a
- * call to <code>update</code> within <em>tm</em> milliseconds.
- * @param tm maximum time in milliseconds before update
- * @see #paint
- * @see java.awt.Component#update(java.awt.Graphics)
- * @since JDK1.0
- */
- public void repaint(long tm) {
- repaint(tm, 0, 0, width, height);
- }
-
- /**
- * Repaints the specified rectangle of this component.
- * <p>
- * This method causes a call to this component's <code>update</code>
- * method as soon as possible.
- * @param x the <i>x</i> coordinate.
- * @param y the <i>y</i> coordinate.
- * @param width the width.
- * @param height the height.
- * @see java.awt.Component#update(java.awt.Graphics)
- * @since JDK1.0
- */
- public void repaint(int x, int y, int width, int height) {
- repaint(0, x, y, width, height);
- }
-
- /**
- * Repaints the specified rectangle of this component within
- * <code>tm</code> milliseconds.
- * <p>
- * This method causes a call to this component's
- * <code>update</code> method.
- * @param tm maximum time in milliseconds before update.
- * @param x the <i>x</i> coordinate.
- * @param y the <i>y</i> coordinate.
- * @param width the width.
- * @param height the height.
- * @see java.awt.Component#update(java.awt.Graphics)
- * @since JDK1.0
- */
- public void repaint(long tm, int x, int y, int width, int height) {
- if (this.peer instanceof java.awt.peer.LightweightPeer) {
- // Needs to be translated to parent coordinates since
- // a parent native container provides the actual repaint
- // services. Additionally, the request is restricted to
- // the bounds of the component.
- int px = this.x + ((x < 0) ? 0 : x);
- int py = this.y + ((y < 0) ? 0 : y);
- int pwidth = (width > this.width) ? this.width : width;
- int pheight = (height > this.height) ? this.height : height;
- parent.repaint(tm, px, py, pwidth, pheight);
- } else {
- ComponentPeer peer = this.peer;
- if ((peer != null) && (width > 0) && (height > 0)) {
- peer.repaint(tm, x, y, width, height);
- }
- }
- }
-
- /**
- * Prints this component. Applications should override this method
- * for components that must do special processing before being
- * printed or should be printed differently than they are painted.
- * <p>
- * The default implementation of this method calls the
- * <code>paint</code> method.
- * <p>
- * The origin of the graphics context, its
- * (<code>0</code>, <code>0</code>) coordinate point, is the
- * top-left corner of this component. The clipping region of the
- * graphics context is the bounding rectangle of this component.
- * @param g the graphics context to use for printing.
- * @see java.awt.Component#paint(java.awt.Graphics)
- * @since JDK1.0
- */
- public void print(Graphics g) {
- paint(g);
- }
-
- /**
- * Prints this component and all of its subcomponents.
- * <p>
- * The origin of the graphics context, its
- * (<code>0</code>, <code>0</code>) coordinate point, is the
- * top-left corner of this component. The clipping region of the
- * graphics context is the bounding rectangle of this component.
- * @param g the graphics context to use for printing.
- * @see java.awt.Component#print(java.awt.Graphics)
- * @since JDK1.0
- */
- public void printAll(Graphics g) {
- ComponentPeer peer = this.peer;
- if (visible && (peer != null)) {
- validate();
- Graphics cg = g.create(0, 0, width, height);
- cg.setFont(getFont());
- try {
- if (peer instanceof java.awt.peer.LightweightPeer) {
- lightweightPrint(cg);
- }
- else {
- peer.print(cg);
- }
- } finally {
- cg.dispose();
- }
- }
- }
-
- /**
- * Simulates the peer callbacks into java.awt for printing of
- * lightweight Components.
- * @param g the graphics context to use for printing.
- * @see #printAll
- */
- void lightweightPrint(Graphics g) {
- print(g);
- }
-
- /**
- * Prints all the heavyweight subcomponents.
- */
- void printHeavyweightComponents(Graphics g) {
- }
-
- /**
- * Repaints the component when the image has changed.
- * This <code>imageUpdate</code> method of an <code>ImageObserver</code>
- * is called when more information about an
- * image which had been previously requested using an asynchronous
- * routine such as the <code>drawImage</code> method of
- * <code>Graphics</code> becomes available.
- * See the definition of <code>imageUpdate</code> for
- * more information on this method and its arguments.
- * <p>
- * The <code>imageUpdate</code> method of <code>Component</code>
- * incrementally draws an image on the component as more of the bits
- * of the image are available.
- * <p>
- * If the system property <code>awt.image.incrementalDraw</code>
- * is missing or has the value <code>true</code>, the image is
- * incrementally drawn, If the system property has any other value,
- * then the image is not drawn until it has been completely loaded.
- * <p>
- * Also, if incremental drawing is in effect, the value of the
- * system property <code>awt.image.redrawrate</code> is interpreted
- * as an integer to give the maximum redraw rate, in milliseconds. If
- * the system property is missing or cannot be interpreted as an
- * integer, the redraw rate is once every 100ms.
- * <p>
- * The interpretation of the <code>x</code>, <code>y</code>,
- * <code>width</code>, and <code>height</code> arguments depends on
- * the value of the <code>infoflags</code> argument.
- * @param img the image being observed.
- * @param infoflags see <code>imageUpdate</code> for more information.
- * @param x the <i>x</i> coordinate.
- * @param y the <i>y</i> coordinate.
- * @param width the width.
- * @param height the height.
- * @return <code>true</code> if the flags indicate that the
- * image is completely loaded;
- * <code>false</code> otherwise.
- * @see java.awt.image.ImageObserver
- * @see java.awt.Graphics#drawImage(java.awt.Image, int, int, java.awt.Color, java.awt.image.ImageObserver)
- * @see java.awt.Graphics#drawImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
- * @see java.awt.Graphics#drawImage(java.awt.Image, int, int, int, int, java.awt.Color, java.awt.image.ImageObserver)
- * @see java.awt.Graphics#drawImage(java.awt.Image, int, int, int, int, java.awt.image.ImageObserver)
- * @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
- * @since JDK1.0
- */
- public boolean imageUpdate(Image img, int flags,
- int x, int y, int w, int h) {
- int rate = -1;
- if ((flags & (FRAMEBITS|ALLBITS)) != 0) {
- rate = 0;
- } else if ((flags & SOMEBITS) != 0) {
- if (isInc) {
- try {
- rate = incRate;
- if (rate < 0)
- rate = 0;
- } catch (Exception e) {
- rate = 100;
- }
- }
- }
- if (rate >= 0) {
- repaint(rate, 0, 0, width, height);
- }
- return (flags & (ALLBITS|ABORT)) == 0;
- }
-
- /**
- * Creates an image from the specified image producer.
- * @param producer the image producer
- * @return the image produced.
- * @since JDK1.0
- */
- public Image createImage(ImageProducer producer) {
- ComponentPeer peer = this.peer;
- if ((peer != null) && ! (peer instanceof java.awt.peer.LightweightPeer)) {
- return peer.createImage(producer);
- }
- return getToolkit().createImage(producer);
- }
-
- /**
- * Creates an off-screen drawable image
- * to be used for double buffering.
- * @param width the specified width.
- * @param height the specified height.
- * @return an off-screen drawable image,
- * which can be used for double buffering.
- * @since JDK1.0
- */
- public Image createImage(int width, int height) {
- ComponentPeer peer = this.peer;
- if (peer instanceof java.awt.peer.LightweightPeer) {
- return parent.createImage(width, height);
- } else {
- return (peer != null) ? peer.createImage(width, height) : null;
- }
- }
-
- /**
- * Prepares an image for rendering on this component. The image
- * data is downloaded asynchronously in another thread and the
- * appropriate screen representation of the image is generated.
- * @param image the <code>Image</code> for which to
- * prepare a screen representation.
- * @param observer the <code>ImageObserver</code> object
- * to be notified as the image is being prepared.
- * @return <code>true</code> if the image has already been fully prepared;
- <code>false</code> otherwise.
- * @since JDK1.0
- */
- public boolean prepareImage(Image image, ImageObserver observer) {
- return prepareImage(image, -1, -1, observer);
- }
-
- /**
- * Prepares an image for rendering on this component at the
- * specified width and height.
- * <p>
- * The image data is downloaded asynchronously in another thread,
- * and an appropriately scaled screen representation of the image is
- * generated.
- * @param image the instance of <code>Image</code>
- * for which to prepare a screen representation.
- * @param width the width of the desired screen representation.
- * @param height the height of the desired screen representation.
- * @param observer the <code>ImageObserver</code> object
- * to be notified as the image is being prepared.
- * @return <code>true</code> if the image has already been fully prepared;
- <code>false</code> otherwise.
- * @see java.awt.image.ImageObserver
- * @since JDK1.0
- */
- public boolean prepareImage(Image image, int width, int height,
- ImageObserver observer) {
- ComponentPeer peer = this.peer;
- if (peer instanceof java.awt.peer.LightweightPeer) {
- return parent.prepareImage(image, width, height, observer);
- } else {
- return (peer != null)
- ? peer.prepareImage(image, width, height, observer)
- : getToolkit().prepareImage(image, width, height, observer);
- }
- }
-
- /**
- * Returns the status of the construction of a screen representation
- * of the specified image.
- * <p>
- * This method does not cause the image to begin loading. An
- * application must use the <code>prepareImage</code> method
- * to force the loading of an image.
- * <p>
- * Information on the flags returned by this method can be found
- * with the discussion of the <code>ImageObserver</code> interface.
- * @param image the <code>Image</code> object whose status
- * is being checked.
- * @param observer the <code>ImageObserver</code>
- * object to be notified as the image is being prepared.
- * @return the bitwise inclusive <b>OR</b> of
- * <code>ImageObserver</code> flags indicating what
- * information about the image is currently available.
- * @see java.awt.Component#prepareImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
- * @see java.awt.Toolkit#checkImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
- * @see java.awt.image.ImageObserver
- * @since JDK1.0
- */
- public int checkImage(Image image, ImageObserver observer) {
- return checkImage(image, -1, -1, observer);
- }
-
- /**
- * Returns the status of the construction of a screen representation
- * of the specified image.
- * <p>
- * This method does not cause the image to begin loading. An
- * application must use the <code>prepareImage</code> method
- * to force the loading of an image.
- * <p>
- * The <code>checkImage</code> method of <code>Component</code>
- * calls its peer's <code>checkImage</code> method to calculate
- * the flags. If this component does not yet have a peer, the
- * component's toolkit's <code>checkImage</code> method is called
- * instead.
- * <p>
- * Information on the flags returned by this method can be found
- * with the discussion of the <code>ImageObserver</code> interface.
- * @param image the <code>Image</code> object whose status
- * is being checked.
- * @param width the width of the scaled version
- * whose status is to be checked.
- * @param height the height of the scaled version
- * whose status is to be checked.
- * @param observer the <code>ImageObserver</code> object
- * to be notified as the image is being prepared.
- * @return the bitwise inclusive <b>OR</b> of
- * <code>ImageObserver</code> flags indicating what
- * information about the image is currently available.
- * @see java.awt.Component#prepareImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
- * @see java.awt.Toolkit#checkImage(java.awt.Image, int, int, java.awt.image.ImageObserver)
- * @see java.awt.image.ImageObserver#_top_
- * @since JDK1.0
- */
- public int checkImage(Image image, int width, int height,
- ImageObserver observer) {
- ComponentPeer peer = this.peer;
- if (peer instanceof java.awt.peer.LightweightPeer) {
- return parent.checkImage(image, width, height, observer);
- } else {
- return (peer != null)
- ? peer.checkImage(image, width, height, observer)
- : getToolkit().checkImage(image, width, height, observer);
- }
- }
-
- /**
- * Checks whether this component "contains" the specified point,
- * where <code>x</code> and <code>y</code> are defined to be
- * relative to the coordinate system of this component.
- * @param x the <i>x</i> coordinate of the point.
- * @param y the <i>y</i> coordinate of the point.
- * @see java.awt.Component#getComponentAt(int, int)
- * @since JDK1.1
- */
- public boolean contains(int x, int y) {
- return inside(x, y);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by contains(int, int).
- */
- public boolean inside(int x, int y) {
- return (x >= 0) && (x < width) && (y >= 0) && (y < height);
- }
-
- /**
- * Checks whether this component "contains" the specified point,
- * where the point's <i>x</i> and <i>y</i> coordinates are defined
- * to be relative to the coordinate system of this component.
- * @param p the point.
- * @see java.awt.Component#getComponentAt(java.awt.Point)
- * @since JDK1.1
- */
- public boolean contains(Point p) {
- return contains(p.x, p.y);
- }
-
- /**
- * Determines if this component or one of its immediate
- * subcomponents contains the (<i>x</i>, <i>y</i>) location,
- * and if so, returns the containing component. This method only
- * looks one level deep. If the point (<i>x</i>, <i>y</i>) is
- * inside a subcomponent that itself has subcomponents, it does not
- * go looking down the subcomponent tree.
- * <p>
- * The <code>locate</code> method of <code>Component</code> simply
- * returns the component itself if the (<i>x</i>, <i>y</i>)
- * coordinate location is inside its bounding box, and <code>null</code>
- * otherwise.
- * @param x the <i>x</i> coordinate.
- * @param y the <i>y</i> coordinate.
- * @return the component or subcomponent that contains the
- * (<i>x</i>, <i>y</i>) location;
- * <code>null</code> if the location
- * is outside this component.
- * @see java.awt.Component#contains(int, int)
- * @since JDK1.0
- */
- public Component getComponentAt(int x, int y) {
- return locate(x, y);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by getComponentAt(int, int).
- */
- public Component locate(int x, int y) {
- return contains(x, y) ? this : null;
- }
-
- /**
- * Returns the component or subcomponent that contains the
- * specified point.
- * @param p the point.
- * @see java.awt.Component#contains
- * @since JDK1.1
- */
- public Component getComponentAt(Point p) {
- return getComponentAt(p.x, p.y);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>dispatchEvent(AWTEvent e)</code>.
- */
- public void deliverEvent(Event e) {
- postEvent(e);
- }
-
- /**
- * Dispatches an event to this component or one of its sub components.
- * Calls processEvent() before returning for 1.1-style events which
- * have been enabled for the Component.
- * @param e the event
- */
- public final void dispatchEvent(AWTEvent e) {
- dispatchEventImpl(e);
- }
-
- void dispatchEventImpl(AWTEvent e) {
- int id = e.getID();
-
- /*
- * 0. Allow the Toolkit to pass this to AWTEventListeners.
- */
- Toolkit.getDefaultToolkit().notifyAWTEventListeners(e);
-
- /*
- * 1. Allow input methods to process the event
- */
- if (areInputMethodsEnabled()
- && (
- // For passive clients of the input method framework
- // we need to pass on InputMethodEvents since some host
- // input method adapters send them through the Java
- // event queue instead of directly to the component,
- // and the input context also handles the Java root window
- ((e instanceof InputMethodEvent) && (getInputMethodRequests() == null))
- ||
- // Otherwise, we only pass on low-level events, because
- // a) input methods shouldn't know about semantic events
- // b) passing on the events takes time
- // c) isConsumed() is always true for semantic events.
- // We exclude paint events since they may be numerous and shouldn't matter.
- (e instanceof ComponentEvent) && !(e instanceof PaintEvent))) {
- InputContext inputContext = getInputContext();
- if (inputContext != null) {
- inputContext.dispatchEvent(e);
- if (e.isConsumed()) {
- return;
- }
- }
- }
-
- /*
- * 2. Pre-process any special events before delivery
- */
- switch(id) {
- // Handling of the PAINT and UPDATE events is now done in the
- // peer's handleEvent() method so the background can be cleared
- // selectively for non-native components on Windows only.
- // - Fred.Ecks@Eng.sun.com, 5-8-98
-
- case FocusEvent.FOCUS_GAINED:
- if (parent != null && !(this instanceof Window)) {
- parent.setFocusOwner(this);
- }
- break;
-
- case FocusEvent.FOCUS_LOST:
- break;
-
- case KeyEvent.KEY_PRESSED:
- case KeyEvent.KEY_RELEASED:
- Container p = (Container)((this instanceof Container) ? this : parent);
- if (p != null) {
- p.preProcessKeyEvent((KeyEvent)e);
- if (e.isConsumed()) {
- return;
- }
- }
- break;
-
- /*
- case MouseEvent.MOUSE_PRESSED:
- if (isFocusTraversable()) {
- requestFocus();
- }
- break;
- */
- default:
- break;
- }
-
- /*
- * 3. Deliver event for normal processing
- */
- if (newEventsOnly) {
- // Filtering needs to really be moved to happen at a lower
- // level in order to get maximum performance gain; it is
- // here temporarily to ensure the API spec is honored.
- //
- if (eventEnabled(e)) {
- processEvent(e);
- }
-
- } else if (!(e instanceof MouseEvent && !postsOldMouseEvents())) {
- //
- // backward compatibility
- //
- Event olde = e.convertToOld();
- if (olde != null) {
- int key = olde.key;
- int modifiers = olde.modifiers;
-
- postEvent(olde);
- if (olde.isConsumed()) {
- e.consume();
- }
- // if target changed key or modifier values, copy them
- // back to original event
- //
- switch(olde.id) {
- case Event.KEY_PRESS:
- case Event.KEY_RELEASE:
- case Event.KEY_ACTION:
- case Event.KEY_ACTION_RELEASE:
- if (olde.key != key) {
- ((KeyEvent)e).setKeyChar(olde.getKeyEventChar());
- }
- if (olde.modifiers != modifiers) {
- ((KeyEvent)e).setModifiers(olde.modifiers);
- }
- break;
- default:
- break;
- }
- }
- }
-
- /*
- * 4. If no one has consumed a key event, propagate it
- * up the containment hierarchy to ensure that menu shortcuts
- * and keyboard traversal will work properly.
- */
- if (!e.isConsumed() && e instanceof java.awt.event.KeyEvent) {
- Container p = (Container)((this instanceof Container) ? this : parent);
- if (p != null) {
- p.postProcessKeyEvent((KeyEvent)e);
- }
- }
-
- /*
- * 5. Allow the peer to process the event
- */
- if (peer != null) {
- peer.handleEvent(e);
- }
- } // dispatchEventImpl()
-
- boolean areInputMethodsEnabled() {
- // in 1.2, we assume input method support is required for all
- // components that handle key events, but components can turn off
- // input methods by calling enableInputMethods(false).
- return ((eventMask & AWTEvent.INPUT_METHODS_ENABLED_MASK) != 0) &&
- ((eventMask & AWTEvent.KEY_EVENT_MASK) != 0 || keyListener != null);
- }
-
- // REMIND: remove when filtering is handled at lower level
- boolean eventEnabled(AWTEvent e) {
- switch(e.id) {
- case ComponentEvent.COMPONENT_MOVED:
- case ComponentEvent.COMPONENT_RESIZED:
- case ComponentEvent.COMPONENT_SHOWN:
- case ComponentEvent.COMPONENT_HIDDEN:
- if ((eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0 ||
- componentListener != null) {
- return true;
- }
- break;
- case FocusEvent.FOCUS_GAINED:
- case FocusEvent.FOCUS_LOST:
- if ((eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0 ||
- focusListener != null) {
- return true;
- }
- break;
- case KeyEvent.KEY_PRESSED:
- case KeyEvent.KEY_RELEASED:
- case KeyEvent.KEY_TYPED:
- if ((eventMask & AWTEvent.KEY_EVENT_MASK) != 0 ||
- keyListener != null) {
- return true;
- }
- break;
- case MouseEvent.MOUSE_PRESSED:
- case MouseEvent.MOUSE_RELEASED:
- case MouseEvent.MOUSE_ENTERED:
- case MouseEvent.MOUSE_EXITED:
- case MouseEvent.MOUSE_CLICKED:
- if ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0 ||
- mouseListener != null) {
- return true;
- }
- break;
- case MouseEvent.MOUSE_MOVED:
- case MouseEvent.MOUSE_DRAGGED:
- if ((eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0 ||
- mouseMotionListener != null) {
- return true;
- }
- break;
- case InputMethodEvent.INPUT_METHOD_TEXT_CHANGED:
- case InputMethodEvent.CARET_POSITION_CHANGED:
- if ((eventMask & AWTEvent.INPUT_METHOD_EVENT_MASK) != 0 ||
- inputMethodListener != null) {
- return true;
- }
- break;
- default:
- break;
- }
- //
- // Always pass on events defined by external programs.
- //
- if (e.id > AWTEvent.RESERVED_ID_MAX) {
- return true;
- }
- return false;
- }
-
- /**
- * Returns the Window subclass that contains this object. Will
- * return the object itself, if it is a window.
- */
- private Window getWindowForObject(Object obj) {
- if (obj instanceof Component) {
- while (obj != null) {
- if (obj instanceof Window) {
- return (Window)obj;
- }
- obj = ((Component)obj).getParent();
- }
- }
- return null;
- } // getWindowForObject()
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by dispatchEvent(AWTEvent).
- */
- public boolean postEvent(Event e) {
- ComponentPeer peer = this.peer;
-
- if (handleEvent(e)) {
- e.consume();
- return true;
- }
-
- Component parent = this.parent;
- int eventx = e.x;
- int eventy = e.y;
- if (parent != null) {
- e.translate(x, y);
- if (parent.postEvent(e)) {
- e.consume();
- return true;
- }
- // restore coords
- e.x = eventx;
- e.y = eventy;
- }
- return false;
- }
-
- // Event source interfaces
-
- /**
- * Adds the specified component listener to receive component events from
- * this component.
- * If l is null, no exception is thrown and no action is performed.
- * @param l the component listener.
- * @see java.awt.event.ComponentEvent
- * @see java.awt.event.ComponentListener
- * @see java.awt.Component#removeComponentListener
- * @since JDK1.1
- */
- public synchronized void addComponentListener(ComponentListener l) {
- if (l == null) {
- return;
- }
- componentListener = AWTEventMulticaster.add(componentListener, l);
- newEventsOnly = true;
- }
- /**
- * Removes the specified component listener so that it no longer
- * receives component events from this component. This method performs
- * no function, nor does it throw an exception, if the listener
- * specified by the argument was not previously added to this component.
- * If l is null, no exception is thrown and no action is performed.
- * @param l the component listener.
- * @see java.awt.event.ComponentEvent
- * @see java.awt.event.ComponentListener
- * @see java.awt.Component#addComponentListener
- * @since JDK1.1
- */
- public synchronized void removeComponentListener(ComponentListener l) {
- if (l == null) {
- return;
- }
- componentListener = AWTEventMulticaster.remove(componentListener, l);
- }
-
- /**
- * Adds the specified focus listener to receive focus events from
- * this component when this component gains input focus.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the focus listener.
- * @see java.awt.event.FocusEvent
- * @see java.awt.event.FocusListener
- * @see java.awt.Component#removeFocusListener
- * @since JDK1.1
- */
- public synchronized void addFocusListener(FocusListener l) {
- if (l == null) {
- return;
- }
- focusListener = AWTEventMulticaster.add(focusListener, l);
- newEventsOnly = true;
-
- // if this is a lightweight component, enable focus events
- // in the native container.
- if (peer instanceof java.awt.peer.LightweightPeer) {
- parent.proxyEnableEvents(AWTEvent.FOCUS_EVENT_MASK);
- }
- }
-
- /**
- * Removes the specified focus listener so that it no longer
- * receives focus events from this component. This method performs
- * no function, nor does it throw an exception, if the listener
- * specified by the argument was not previously added to this component.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the focus listener.
- * @see java.awt.event.FocusEvent
- * @see java.awt.event.FocusListener
- * @see java.awt.Component#addFocusListener
- * @since JDK1.1
- */
- public synchronized void removeFocusListener(FocusListener l) {
- if (l == null) {
- return;
- }
- focusListener = AWTEventMulticaster.remove(focusListener, l);
- }
-
- /**
- * Adds the specified key listener to receive key events from
- * this component.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the key listener.
- * @see java.awt.event.KeyEvent
- * @see java.awt.event.KeyListener
- * @see java.awt.Component#removeKeyListener
- * @since JDK1.1
- */
- public synchronized void addKeyListener(KeyListener l) {
- if (l == null) {
- return;
- }
- keyListener = AWTEventMulticaster.add(keyListener, l);
- newEventsOnly = true;
-
- // if this is a lightweight component, enable key events
- // in the native container.
- if (peer instanceof java.awt.peer.LightweightPeer) {
- parent.proxyEnableEvents(AWTEvent.KEY_EVENT_MASK);
- }
- }
-
- /**
- * Removes the specified key listener so that it no longer
- * receives key events from this component. This method performs
- * no function, nor does it throw an exception, if the listener
- * specified by the argument was not previously added to this component.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the key listener.
- * @see java.awt.event.KeyEvent
- * @see java.awt.event.KeyListener
- * @see java.awt.Component#addKeyListener
- * @since JDK1.1
- */
- public synchronized void removeKeyListener(KeyListener l) {
- if (l == null) {
- return;
- }
- keyListener = AWTEventMulticaster.remove(keyListener, l);
- }
-
- /**
- * Adds the specified mouse listener to receive mouse events from
- * this component.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the mouse listener.
- * @see java.awt.event.MouseEvent
- * @see java.awt.event.MouseListener
- * @see java.awt.Component#removeMouseListener
- * @since JDK1.1
- */
- public synchronized void addMouseListener(MouseListener l) {
- if (l == null) {
- return;
- }
- mouseListener = AWTEventMulticaster.add(mouseListener,l);
- newEventsOnly = true;
-
- // if this is a lightweight component, enable mouse events
- // in the native container.
- if (peer instanceof java.awt.peer.LightweightPeer) {
- parent.proxyEnableEvents(AWTEvent.MOUSE_EVENT_MASK);
- }
- }
-
- /**
- * Removes the specified mouse listener so that it no longer
- * receives mouse events from this component. This method performs
- * no function, nor does it throw an exception, if the listener
- * specified by the argument was not previously added to this component.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the mouse listener.
- * @see java.awt.event.MouseEvent
- * @see java.awt.event.MouseListener
- * @see java.awt.Component#addMouseListener
- * @since JDK1.1
- */
- public synchronized void removeMouseListener(MouseListener l) {
- if (l == null) {
- return;
- }
- mouseListener = AWTEventMulticaster.remove(mouseListener, l);
- }
-
- /**
- * Adds the specified mouse motion listener to receive mouse motion events from
- * this component.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the mouse motion listener.
- * @see java.awt.event.MouseMotionEvent
- * @see java.awt.event.MouseMotionListener
- * @see java.awt.Component#removeMouseMotionListener
- * @since JDK1.1
- */
- public synchronized void addMouseMotionListener(MouseMotionListener l) {
- if (l == null) {
- return;
- }
- mouseMotionListener = AWTEventMulticaster.add(mouseMotionListener,l);
- newEventsOnly = true;
-
- // if this is a lightweight component, enable mouse events
- // in the native container.
- if (peer instanceof java.awt.peer.LightweightPeer) {
- parent.proxyEnableEvents(AWTEvent.MOUSE_MOTION_EVENT_MASK);
- }
- }
-
- /**
- * Removes the specified mouse motion listener so that it no longer
- * receives mouse motion events from this component. This method performs
- * no function, nor does it throw an exception, if the listener
- * specified by the argument was not previously added to this component.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the mouse motion listener.
- * @see java.awt.event.MouseMotionEvent
- * @see java.awt.event.MouseMotionListener
- * @see java.awt.Component#addMouseMotionListener
- * @since JDK1.1
- */
- public synchronized void removeMouseMotionListener(MouseMotionListener l) {
- if (l == null) {
- return;
- }
- mouseMotionListener = AWTEventMulticaster.remove(mouseMotionListener, l);
- }
-
- /**
- * Adds the specified input method listener to receive
- * input method events from this component. A component will
- * only receive input method events from input methods
- * if it also overrides getInputMethodRequests to return an
- * InputMethodRequests instance.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the input method listener.
- * @see java.awt.event.InputMethodEvent
- * @see java.awt.event.InputMethodListener
- * @see java.awt.Component#removeInputMethodListener
- * @see java.awt.Component#getInputMethodRequests
- * @since JDK1.2
- */
- public synchronized void addInputMethodListener(InputMethodListener l) {
- if (l == null) {
- return;
- }
- inputMethodListener = AWTEventMulticaster.add(inputMethodListener, l);
- newEventsOnly = true;
- }
-
- /**
- * Removes the specified input method listener so that it no longer receives
- * input method events from this component. This method performs
- * no function, nor does it throw an exception, if the listener
- * specified by the argument was not previously added to this component.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the input method listener.
- * @see java.awt.event.InputMethodEvent
- * @see java.awt.event.InputMethodListener
- * @see java.awt.Component#addInputMethodListener
- * @since JDK1.2
- */
- public synchronized void removeInputMethodListener(InputMethodListener l) {
- if (l == null) {
- return;
- }
- inputMethodListener = AWTEventMulticaster.remove(inputMethodListener, l);
- }
-
- /**
- * Gets the input method request handler which supports
- * requests from input methods for this component. A component
- * that supports on-the-spot text input must override this
- * method to return an InputMethodRequests instance. At the same
- * time, it also has to handle input method events.
- *
- * @return the input method request handler for this component,
- * null by default.
- * @see #addInputMethodListener
- * @since JDK1.2
- */
- public InputMethodRequests getInputMethodRequests() {
- return null;
- }
-
- /**
- * Gets the input context used by this component for handling the communication
- * with input methods when text is entered in this component. By default, the
- * input context used for the parent component is returned. Components may
- * override this to return a private input context.
- *
- * @return The input context used by this component. Null if no context can
- * be determined.
- * @since JDK1.2
- */
- public InputContext getInputContext() {
- Container parent = this.parent;
- if (parent == null) {
- return null;
- } else {
- return parent.getInputContext();
- }
- }
-
- /**
- * Enables the events defined by the specified event mask parameter
- * to be delivered to this component.
- * <p>
- * Event types are automatically enabled when a listener for
- * that event type is added to the component.
- * <p>
- * This method only needs to be invoked by subclasses of
- * <code>Component</code> which desire to have the specified event
- * types delivered to <code>processEvent</code> regardless of whether
- * or not a listener is registered.
- * @param eventsToEnable the event mask defining the event types.
- * @see java.awt.Component#processEvent
- * @see java.awt.Component#disableEvents
- * @since JDK1.1
- */
- protected final void enableEvents(long eventsToEnable) {
- eventMask |= eventsToEnable;
- newEventsOnly = true;
-
- // if this is a lightweight component, enable mouse events
- // in the native container.
- if (peer instanceof java.awt.peer.LightweightPeer) {
- parent.proxyEnableEvents(eventMask);
- }
- }
-
- /**
- * Disables the events defined by the specified event mask parameter
- * from being delivered to this component.
- * @param eventsToDisable the event mask defining the event types
- * @see java.awt.Component#enableEvents
- * @since JDK1.1
- */
- protected final void disableEvents(long eventsToDisable) {
- eventMask &= ~eventsToDisable;
- }
-
- /**
- * Potentially coalesce an event being posted with an existing
- * event. This method is called by EventQueue.postEvent if an
- * event with the same ID as the event to be posted is found in
- * the queue (both events must have this component as their source).
- * This method either returns a coalesced event which replaces
- * the existing event (and the new event is then discarded), or
- * null to indicate that no combining should be done (add the
- * second event to the end of the queue). Either event parameter
- * may be modified and returned, as the other one is discarded
- * unless null is returned.
- * <p>
- * This implementation of coalesceEvents coalesces two event types:
- * mouse move (and drag) events, and paint (and update) events.
- * For mouse move events the last event is always returned, causing
- * intermediate moves to be discarded. For paint events where the
- * update rectangle of one paint event is completely contained within
- * the update rectangle of the other paint event, the event with the
- * smaller rectangle is discarded.
- *
- * @param existingEvent the event already on the EventQueue.
- * @param newEvent the event being posted to the EventQueue.
- * @return a coalesced event, or null indicating that no coalescing
- * was done.
- */
- protected AWTEvent coalesceEvents(AWTEvent existingEvent,
- AWTEvent newEvent) {
- int id = existingEvent.getID();
- if (assert) {
- // Enable assert to perform this extra sanity check, but it's too
- // expensive for normal operation.
- if (id != newEvent.getID() ||
- !(existingEvent.getSource().equals(newEvent.getSource()))) {
- // Only coalesce events of the same type and source.
- return null;
- }
- }
-
- switch (id) {
- case Event.MOUSE_MOVE:
- case Event.MOUSE_DRAG: {
- MouseEvent e = (MouseEvent)existingEvent;
- if (e.getModifiers() == ((MouseEvent)newEvent).getModifiers()) {
- // Just return the newEvent, causing the old to be
- // discarded.
- return newEvent;
- }
- break;
- }
- case PaintEvent.PAINT:
- case PaintEvent.UPDATE: {
- // This approach to coalescing paint events seems to be
- // better than any heuristic for unioning rectangles.
-
- PaintEvent existingPaintEvent = (PaintEvent) existingEvent;
- PaintEvent newPaintEvent = (PaintEvent) newEvent;
- Rectangle existingRect = existingPaintEvent.getUpdateRect();
- Rectangle newRect = newPaintEvent.getUpdateRect();
-
- if (existingRect.contains(newRect)) {
- return existingEvent;
- }
- if (newRect.contains(existingRect)) {
- return newEvent;
- }
-
- break;
- }
- }
- return null;
- }
-
- /**
- * Processes events occurring on this component. By default this
- * method calls the appropriate
- * <code>process<event type>Event</code>
- * method for the given class of event.
- * @param e the event.
- * @see java.awt.Component#processComponentEvent
- * @see java.awt.Component#processFocusEvent
- * @see java.awt.Component#processKeyEvent
- * @see java.awt.Component#processMouseEvent
- * @see java.awt.Component#processMouseMotionEvent
- * @see java.awt.Component#processInputMethodEvent
- * @since JDK1.1
- */
- protected void processEvent(AWTEvent e) {
-
- //System.err.println("Component.processNewEvent:" + e);
- if (e instanceof FocusEvent) {
- processFocusEvent((FocusEvent)e);
-
- } else if (e instanceof MouseEvent) {
- switch(e.getID()) {
- case MouseEvent.MOUSE_PRESSED:
- case MouseEvent.MOUSE_RELEASED:
- case MouseEvent.MOUSE_CLICKED:
- case MouseEvent.MOUSE_ENTERED:
- case MouseEvent.MOUSE_EXITED:
- processMouseEvent((MouseEvent)e);
- break;
- case MouseEvent.MOUSE_MOVED:
- case MouseEvent.MOUSE_DRAGGED:
- processMouseMotionEvent((MouseEvent)e);
- break;
- }
-
- } else if (e instanceof KeyEvent) {
- processKeyEvent((KeyEvent)e);
-
- } else if (e instanceof ComponentEvent) {
- processComponentEvent((ComponentEvent)e);
- } else if (e instanceof InputMethodEvent) {
- processInputMethodEvent((InputMethodEvent)e);
- }
- }
-
- /**
- * Processes component events occurring on this component by
- * dispatching them to any registered
- * <code>ComponentListener</code> objects.
- * <p>
- * This method is not called unless component events are
- * enabled for this component. Component events are enabled
- * when one of the following occurs:
- * <p><ul>
- * <li>A <code>ComponentListener</code> object is registered
- * via <code>addComponentListener</code>.
- * <li>Component events are enabled via <code>enableEvents</code>.
- * </ul>
- * @param e the component event.
- * @see java.awt.event.ComponentEvent
- * @see java.awt.event.ComponentListener
- * @see java.awt.Component#addComponentListener
- * @see java.awt.Component#enableEvents
- * @since JDK1.1
- */
- protected void processComponentEvent(ComponentEvent e) {
- ComponentListener listener = componentListener;
- if (listener != null) {
- int id = e.getID();
- switch(id) {
- case ComponentEvent.COMPONENT_RESIZED:
- listener.componentResized(e);
- break;
- case ComponentEvent.COMPONENT_MOVED:
- listener.componentMoved(e);
- break;
- case ComponentEvent.COMPONENT_SHOWN:
- listener.componentShown(e);
- break;
- case ComponentEvent.COMPONENT_HIDDEN:
- listener.componentHidden(e);
- break;
- }
- }
- }
-
- /**
- * Processes focus events occurring on this component by
- * dispatching them to any registered
- * <code>FocusListener</code> objects.
- * <p>
- * This method is not called unless focus events are
- * enabled for this component. Focus events are enabled
- * when one of the following occurs:
- * <p><ul>
- * <li>A <code>FocusListener</code> object is registered
- * via <code>addFocusListener</code>.
- * <li>Focus events are enabled via <code>enableEvents</code>.
- * </ul>
- * @param e the focus event.
- * @see java.awt.event.FocusEvent
- * @see java.awt.event.FocusListener
- * @see java.awt.Component#addFocusListener
- * @see java.awt.Component#enableEvents
- * @since JDK1.1
- */
- protected void processFocusEvent(FocusEvent e) {
- FocusListener listener = focusListener;
- if (listener != null) {
- int id = e.getID();
- switch(id) {
- case FocusEvent.FOCUS_GAINED:
- listener.focusGained(e);
- break;
- case FocusEvent.FOCUS_LOST:
- listener.focusLost(e);
- break;
- }
- }
- }
-
- /**
- * Processes key events occurring on this component by
- * dispatching them to any registered
- * <code>KeyListener</code> objects.
- * <p>
- * This method is not called unless key events are
- * enabled for this component. Key events are enabled
- * when one of the following occurs:
- * <p><ul>
- * <li>A <code>KeyListener</code> object is registered
- * via <code>addKeyListener</code>.
- * <li>Key events are enabled via <code>enableEvents</code>.
- * </ul>
- * @param e the key event.
- * @see java.awt.event.KeyEvent
- * @see java.awt.event.KeyListener
- * @see java.awt.Component#addKeyListener
- * @see java.awt.Component#enableEvents
- * @since JDK1.1
- */
- protected void processKeyEvent(KeyEvent e) {
- KeyListener listener = keyListener;
- if (listener != null) {
- int id = e.getID();
- switch(id) {
- case KeyEvent.KEY_TYPED:
- listener.keyTyped(e);
- break;
- case KeyEvent.KEY_PRESSED:
- listener.keyPressed(e);
- break;
- case KeyEvent.KEY_RELEASED:
- listener.keyReleased(e);
- break;
- }
- }
- }
-
- /**
- * Processes mouse events occurring on this component by
- * dispatching them to any registered
- * <code>MouseListener</code> objects.
- * <p>
- * This method is not called unless mouse events are
- * enabled for this component. Mouse events are enabled
- * when one of the following occurs:
- * <p><ul>
- * <li>A <code>MouseListener</code> object is registered
- * via <code>addMouseListener</code>.
- * <li>Mouse events are enabled via <code>enableEvents</code>.
- * </ul>
- * @param e the mouse event.
- * @see java.awt.event.MouseEvent
- * @see java.awt.event.MouseListener
- * @see java.awt.Component#addMouseListener
- * @see java.awt.Component#enableEvents
- * @since JDK1.1
- */
- protected void processMouseEvent(MouseEvent e) {
- MouseListener listener = mouseListener;
- if (listener != null) {
- int id = e.getID();
- switch(id) {
- case MouseEvent.MOUSE_PRESSED:
- listener.mousePressed(e);
- break;
- case MouseEvent.MOUSE_RELEASED:
- listener.mouseReleased(e);
- break;
- case MouseEvent.MOUSE_CLICKED:
- listener.mouseClicked(e);
- break;
- case MouseEvent.MOUSE_EXITED:
- listener.mouseExited(e);
- break;
- case MouseEvent.MOUSE_ENTERED:
- listener.mouseEntered(e);
- break;
- }
- }
- }
-
- /**
- * Processes mouse motion events occurring on this component by
- * dispatching them to any registered
- * <code>MouseMotionListener</code> objects.
- * <p>
- * This method is not called unless mouse motion events are
- * enabled for this component. Mouse motion events are enabled
- * when one of the following occurs:
- * <p><ul>
- * <li>A <code>MouseMotionListener</code> object is registered
- * via <code>addMouseMotionListener</code>.
- * <li>Mouse motion events are enabled via <code>enableEvents</code>.
- * </ul>
- * @param e the mouse motion event.
- * @see java.awt.event.MouseMotionEvent
- * @see java.awt.event.MouseMotionListener
- * @see java.awt.Component#addMouseMotionListener
- * @see java.awt.Component#enableEvents
- * @since JDK1.1
- */
- protected void processMouseMotionEvent(MouseEvent e) {
- MouseMotionListener listener = mouseMotionListener;
- if (listener != null) {
- int id = e.getID();
- switch(id) {
- case MouseEvent.MOUSE_MOVED:
- listener.mouseMoved(e);
- break;
- case MouseEvent.MOUSE_DRAGGED:
- listener.mouseDragged(e);
- break;
- }
- }
- }
-
- boolean postsOldMouseEvents() {
- return false;
- }
-
- /**
- * Processes input method events occurring on this component by
- * dispatching them to any registered
- * <code>InputMethodListener</code> objects.
- * <p>
- * This method is not called unless input method events
- * are enabled for this component. Input method events are enabled
- * when one of the following occurs:
- * <p><ul>
- * <li>An <code>InputMethodListener</code> object is registered
- * via <code>addInputMethodListener</code>.
- * <li>Input method events are enabled via <code>enableEvents</code>.
- * </ul>
- * @param e the input method event
- * @see java.awt.event.InputMethodEvent
- * @see java.awt.event.InputMethodListener
- * @see java.awt.Component#addInputMethodListener
- * @see java.awt.Component#enableEvents
- * @since JDK1.2
- */
- protected void processInputMethodEvent(InputMethodEvent e) {
- InputMethodListener listener = inputMethodListener;
- if (listener != null) {
- int id = e.getID();
- switch (id) {
- case InputMethodEvent.INPUT_METHOD_TEXT_CHANGED:
- listener.inputMethodTextChanged(e);
- break;
- case InputMethodEvent.CARET_POSITION_CHANGED:
- listener.caretPositionChanged(e);
- break;
- }
- }
- }
-
- /**
- * @deprecated As of JDK version 1.1
- * replaced by processEvent(AWTEvent).
- */
- public boolean handleEvent(Event evt) {
- switch (evt.id) {
- case Event.MOUSE_ENTER:
- return mouseEnter(evt, evt.x, evt.y);
-
- case Event.MOUSE_EXIT:
- return mouseExit(evt, evt.x, evt.y);
-
- case Event.MOUSE_MOVE:
- return mouseMove(evt, evt.x, evt.y);
-
- case Event.MOUSE_DOWN:
- return mouseDown(evt, evt.x, evt.y);
-
- case Event.MOUSE_DRAG:
- return mouseDrag(evt, evt.x, evt.y);
-
- case Event.MOUSE_UP:
- return mouseUp(evt, evt.x, evt.y);
-
- case Event.KEY_PRESS:
- case Event.KEY_ACTION:
- return keyDown(evt, evt.key);
-
- case Event.KEY_RELEASE:
- case Event.KEY_ACTION_RELEASE:
- return keyUp(evt, evt.key);
-
- case Event.ACTION_EVENT:
- return action(evt, evt.arg);
- case Event.GOT_FOCUS:
- return gotFocus(evt, evt.arg);
- case Event.LOST_FOCUS:
- return lostFocus(evt, evt.arg);
- }
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processMouseEvent(MouseEvent).
- */
- public boolean mouseDown(Event evt, int x, int y) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processMouseMotionEvent(MouseEvent).
- */
- public boolean mouseDrag(Event evt, int x, int y) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processMouseEvent(MouseEvent).
- */
- public boolean mouseUp(Event evt, int x, int y) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processMouseMotionEvent(MouseEvent).
- */
- public boolean mouseMove(Event evt, int x, int y) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processMouseEvent(MouseEvent).
- */
- public boolean mouseEnter(Event evt, int x, int y) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processMouseEvent(MouseEvent).
- */
- public boolean mouseExit(Event evt, int x, int y) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processKeyEvent(KeyEvent).
- */
- public boolean keyDown(Event evt, int key) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processKeyEvent(KeyEvent).
- */
- public boolean keyUp(Event evt, int key) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * should register this component as ActionListener on component
- * which fires action events.
- */
- public boolean action(Event evt, Object what) {
- return false;
- }
-
- /**
- * Makes this Component displayable by connecting it to a
- * native screen resource.
- * This method is called internally by the toolkit and should
- * not be called directly by programs.
- * @see java.awt.Component#isDisplayable
- * @see java.awt.Component#removeNotify
- * @since JDK1.0
- */
- public void addNotify() {
- synchronized (getTreeLock()) {
- ComponentPeer peer = this.peer;
- if (peer == null || peer instanceof java.awt.peer.LightweightPeer){
- if (peer == null) {
- // Update both the Component's peer variable and the local
- // variable we use for thread safety.
- this.peer = peer = getToolkit().createComponent(this);
- }
-
- // This is a lightweight component which means it won't be
- // able to get window-related events by itself. If any
- // have been enabled, then the nearest native container must
- // be enabled.
- long mask = 0;
- if ((mouseListener != null) || ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0)) {
- mask |= AWTEvent.MOUSE_EVENT_MASK;
- }
- if ((mouseMotionListener != null) ||
- ((eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0)) {
- mask |= AWTEvent.MOUSE_MOTION_EVENT_MASK;
- }
- if (focusListener != null || (eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0) {
- mask |= AWTEvent.FOCUS_EVENT_MASK;
- }
- if (keyListener != null || (eventMask & AWTEvent.KEY_EVENT_MASK) != 0) {
- mask |= AWTEvent.KEY_EVENT_MASK;
- }
- if (mask != 0) {
- parent.proxyEnableEvents(mask);
- }
- } else {
- // It's native. If the parent is lightweight it
- // will need some help.
- Container parent = this.parent;
- if (parent != null && parent.peer instanceof java.awt.peer.LightweightPeer) {
- new NativeInLightFixer();
- }
- }
- invalidate();
-
- int npopups = (popups != null? popups.size() : 0);
- for (int i = 0 ; i < npopups ; i++) {
- PopupMenu popup = (PopupMenu)popups.elementAt(i);
- popup.addNotify();
- }
- for (Component p = getParent(); p != null; p = p.getParent())
- if (p instanceof Window) {
- if (((Window)p).getWarningString() == null) {
- //!CQ set newEventsOnly if appropriate/possible?
- }
- break;
- }
-
- if (dropTarget != null) dropTarget.addNotify(peer);
-
- peerFont = getFont();
- }
- }
-
- /**
- * Makes this Component undisplayable by destroying it native
- * screen resource.
- * This method is called by the toolkit internally and should
- * not be called directly by programs.
- * @see java.awt.Component#isDisplayable
- * @see java.awt.Component#addNotify
- * @since JDK1.0
- */
- public void removeNotify() {
- synchronized (getTreeLock()) {
- int npopups = (popups != null? popups.size() : 0);
- for (int i = 0 ; i < npopups ; i++) {
- PopupMenu popup = (PopupMenu)popups.elementAt(i);
- popup.removeNotify();
- }
- // If there is any input context for this component, notify
- // that this component is being removed. (This has to be done
- // before hiding peer.)
- if (areInputMethodsEnabled()) {
- InputContext inputContext = getInputContext();
- if (inputContext != null) {
- inputContext.removeNotify(this);
- }
- }
-
- ComponentPeer p = peer;
- if (p != null) {
-
- if (dropTarget != null) dropTarget.removeNotify(peer);
-
- // Hide peer first to stop system events such as cursor moves.
- if (visible) {
- p.hide();
- }
-
- peer = null; // Stop peer updates.
- peerFont = null;
-
- Toolkit.getEventQueue().removeSourceEvents(this);
-
-
- p.dispose();
- }
- }
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processFocusEvent(FocusEvent).
- */
- public boolean gotFocus(Event evt, Object what) {
- return false;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by processFocusEvent(FocusEvent).
- */
- public boolean lostFocus(Event evt, Object what) {
- return false;
- }
-
- /**
- * Returns the value of a flag that indicates whether
- * this component can be traversed using
- * Tab or Shift-Tab keyboard focus traversal. If this method
- * returns "false", this component may still request the keyboard
- * focus using <code>requestFocus()</code>, but it will not automatically
- * be assigned focus during tab traversal.
- * @return <code>true</code> if this component is
- * focus-traverable; <code>false</code> otherwise.
- * @since JDK1.1
- */
- public boolean isFocusTraversable() {
- ComponentPeer peer = this.peer;
- if (peer != null) {
- return peer.isFocusTraversable();
- }
- return false;
- }
-
- /**
- * Requests that this component get the input focus.
- * The component must be visible
- * on the screen for this request to be granted
- * @see FocusEvent
- * @see #addFocusListener
- * @see #processFocusEvent
- * @see #isFocusTraversable
- * @since JDK1.0
- */
- public void requestFocus() {
- ComponentPeer peer = this.peer;
- if (peer != null) {
- if (peer instanceof java.awt.peer.LightweightPeer) {
- parent.proxyRequestFocus(this);
- } else {
- peer.requestFocus();
- Toolkit.getEventQueue().changeKeyEventFocus(this);
- }
- }
- }
-
- /**
- * Transfers the focus to the next component.
- * @see java.awt.Component#requestFocus
- * @since JDK1.1s
- */
- public void transferFocus() {
- nextFocus();
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by transferFocus().
- */
- public void nextFocus() {
- Container parent = this.parent;
- if (parent != null) {
- parent.transferFocus(this);
- }
- }
-
- /**
- * Returns true if this Component has the keyboard focus.
- *
- * @return true if this Component has the keyboard focus.
- * @since JDK1.2
- */
- public boolean hasFocus() {
- if ((eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0) {
- return hasFocus;
- }
- else {
- for (Container p = getParent(); p != null; p = p.getParent()) {
- if (p instanceof Window) {
- return ((Window)p).getFocusOwner() == this;
- }
- }
- return false;
- }
- }
-
- /**
- * Adds the specified popup menu to the component.
- * @param popup the popup menu to be added to the component.
- * @see java.awt.Component#remove(java.awt.MenuComponent)
- * @since JDK1.1
- */
- public synchronized void add(PopupMenu popup) {
- if (popup.parent != null) {
- popup.parent.remove(popup);
- }
- if (popups == null) {
- popups = new Vector();
- }
- popups.addElement(popup);
- popup.parent = this;
-
- if (peer != null) {
- if (popup.peer == null) {
- popup.addNotify();
- }
- }
- }
-
- /**
- * Removes the specified popup menu from the component.
- * @param popup the popup menu to be removed.
- * @see java.awt.Component#add(java.awt.PopupMenu)
- * @since JDK1.1
- */
- public synchronized void remove(MenuComponent popup) {
- if (popups != null) {
- int index = popups.indexOf(popup);
- if (index >= 0) {
- PopupMenu pmenu = (PopupMenu)popup;
- if (pmenu.peer != null) {
- pmenu.removeNotify();
- }
- pmenu.parent = null;
- popups.removeElementAt(index);
- if (popups.size() == 0) {
- popups = null;
- }
- }
- }
- }
-
- /**
- * Returns a string representing the state of this component. This
- * method is intended to be used only for debugging purposes, and the
- * content and format of the returned string may vary between
- * implementations. The returned string may be empty but may not be
- * <code>null</code>.
- *
- * @return a string representation of this component's state.
- * @since JDK1.0
- */
- protected String paramString() {
- String thisName = getName();
- String str = (thisName != null? thisName : "") + "," + x + "," + y + "," + width + "x" + height;
- if (!valid) {
- str += ",invalid";
- }
- if (!visible) {
- str += ",hidden";
- }
- if (!enabled) {
- str += ",disabled";
- }
- return str;
- }
-
- /**
- * Returns a string representation of this component and its values.
- * @return a string representation of this component.
- * @since JDK1.0
- */
- public String toString() {
- return getClass().getName() + "[" + paramString() + "]";
- }
-
- /**
- * Prints a listing of this component to the standard system output
- * stream <code>System.out</code>.
- * @see java.lang.System#out
- * @since JDK1.0
- */
- public void list() {
- list(System.out, 0);
- }
-
- /**
- * Prints a listing of this component to the specified output
- * stream.
- * @param out a print stream.
- * @since JDK1.0
- */
- public void list(PrintStream out) {
- list(out, 0);
- }
-
- /**
- * Prints out a list, starting at the specified indention, to the
- * specified print stream.
- * @param out a print stream.
- * @param indent number of spaces to indent.
- * @see java.io.PrintStream#println(java.lang.Object)
- * @since JDK1.0
- */
- public void list(PrintStream out, int indent) {
- for (int i = 0 ; i < indent ; i++) {
- out.print(" ");
- }
- out.println(this);
- }
-
- /**
- * Prints a listing to the specified print writer.
- * @param out The print writer to print to.
- * @since JDK1.1
- */
- public void list(PrintWriter out) {
- list(out, 0);
- }
-
- /**
- * Prints out a list, starting at the specified indention, to
- * the specified print writer.
- * @param out The print writer to print to.
- * @param indent The number of spaces to indent.
- * @see java.io.PrintStream#println(java.lang.Object)
- * @since JDK1.1
- */
- public void list(PrintWriter out, int indent) {
- for (int i = 0 ; i < indent ; i++) {
- out.print(" ");
- }
- out.println(this);
- }
-
- /*
- * Fetch the native container somewhere higher up in the component
- * tree that contains this component.
- */
- Container getNativeContainer() {
- Container p = parent;
- while (p != null && p.peer instanceof java.awt.peer.LightweightPeer) {
- p = p.getParent();
- }
- return p;
- }
-
- /**
- * Add a PropertyChangeListener to the listener list.
- * The listener is registered for all properties.
- * <p>
- * A PropertyChangeEvent will get fired in response to an
- * explicit setFont, setBackground, or SetForeground on the
- * current component. Note that if the current component is
- * inheriting its foreground, background, or font from its
- * container, then no event will be fired in response to a
- * change in the inherited property.
- *
- * If listener is null, no exception is thrown and no action is performed.
- *
- * @param listener The PropertyChangeListener to be added
- */
- public synchronized void addPropertyChangeListener(
- PropertyChangeListener listener) {
- if (listener == null) {
- return;
- }
- if (changeSupport == null) {
- changeSupport = new java.beans.PropertyChangeSupport(this);
- }
- changeSupport.addPropertyChangeListener(listener);
- }
-
- /**
- * Remove a PropertyChangeListener from the listener list.
- * This removes a PropertyChangeListener that was registered
- * for all properties.
- *
- * If listener is null, no exception is thrown and no action is performed.
- *
- * @param listener The PropertyChangeListener to be removed
- */
- public synchronized void removePropertyChangeListener(
- PropertyChangeListener listener) {
- if (listener == null) {
- return;
- }
- if (changeSupport == null) {
- return;
- }
- changeSupport.removePropertyChangeListener(listener);
- }
-
- /**
- * Add a PropertyChangeListener for a specific property. The listener
- * will be invoked only when a call on firePropertyChange names that
- * specific property.
- *
- * If listener is null, no exception is thrown and no action is performed.
- *
- * @param propertyName The name of the property to listen on.
- * @param listener The PropertyChangeListener to be added
- */
- public synchronized void addPropertyChangeListener(
- String propertyName,
- PropertyChangeListener listener) {
- if (listener == null) {
- return;
- }
- if (changeSupport == null) {
- changeSupport = new java.beans.PropertyChangeSupport(this);
- }
- changeSupport.addPropertyChangeListener(propertyName, listener);
- }
-
- /**
- * Remove a PropertyChangeListener for a specific property.
- * If listener is null, no exception is thrown and no action is performed.
- *
- * @param propertyName The name of the property that was listened on.
- * @param listener The PropertyChangeListener to be removed
- */
- public synchronized void removePropertyChangeListener(
- String propertyName,
- PropertyChangeListener listener) {
- if (listener == null) {
- return;
- }
- if (changeSupport == null) {
- return;
- }
- changeSupport.removePropertyChangeListener(propertyName, listener);
- }
-
- /**
- * Support for reporting bound property changes. This method can be called
- * when a bound property has changed and it will send the appropriate
- * PropertyChangeEvent to any registered PropertyChangeListeners.
- */
- protected void firePropertyChange(String propertyName,
- Object oldValue, Object newValue) {
- java.beans.PropertyChangeSupport changeSupport = this.changeSupport;
- if (changeSupport == null) {
- return;
- }
- changeSupport.firePropertyChange(propertyName, oldValue, newValue);
- }
-
-
- /* Serialization support.
- */
- /**
- * Component Serialized Data Version.
- *
- * @serial
- */
- private int componentSerializedDataVersion = 2;
-
- /**
- * Writes default serializable fields to stream. Writes
- * a list of serializable ItemListener(s) as optional data.
- * The non-serializable ItemListener(s) are detected and
- * no attempt is made to serialize them.
- *
- * @serialData Null terminated sequence of 0 or more pairs.
- * The pair consists of a String and Object.
- * The String indicates the type of object and
- * is one of the following :
- * itemListenerK indicating and ItemListener object.
- *
- * @see AWTEventMulticaster.save(ObjectOutputStream, String, EventListener)
- * @see java.awt.Component.itemListenerK
- */
- private void writeObject(ObjectOutputStream s)
- throws IOException
- {
- s.defaultWriteObject();
-
- AWTEventMulticaster.save(s, componentListenerK, componentListener);
- AWTEventMulticaster.save(s, focusListenerK, focusListener);
- AWTEventMulticaster.save(s, keyListenerK, keyListener);
- AWTEventMulticaster.save(s, mouseListenerK, mouseListener);
- AWTEventMulticaster.save(s, mouseMotionListenerK, mouseMotionListener);
- AWTEventMulticaster.save(s, inputMethodListenerK, inputMethodListener);
-
- s.writeObject(null);
- s.writeObject(componentOrientation);
- }
-
- /**
- * Read the ObjectInputStream and if it isnt null
- * add a listener to receive item events fired
- * by the components.
- * Unrecognised keys or values will be Ignored.
- *
- * @see removeActionListener()
- * @see addActionListener()
- */
- private void readObject(ObjectInputStream s)
- throws ClassNotFoundException, IOException
- {
- s.defaultReadObject();
-
- appContext = AppContext.getAppContext();
- SunToolkit.insertTargetMapping(this, appContext);
-
- Object keyOrNull;
- while(null != (keyOrNull = s.readObject())) {
- String key = ((String)keyOrNull).intern();
-
- if (componentListenerK == key)
- addComponentListener((ComponentListener)(s.readObject()));
-
- else if (focusListenerK == key)
- addFocusListener((FocusListener)(s.readObject()));
-
- else if (keyListenerK == key)
- addKeyListener((KeyListener)(s.readObject()));
-
- else if (mouseListenerK == key)
- addMouseListener((MouseListener)(s.readObject()));
-
- else if (mouseMotionListenerK == key)
- addMouseMotionListener((MouseMotionListener)(s.readObject()));
-
- else if (inputMethodListenerK == key)
- addInputMethodListener((InputMethodListener)(s.readObject()));
-
- else // skip value for unrecognized key
- s.readObject();
-
- }
-
- // Read the component's orientation if it's present
- Object orient = null;
-
- try {
- orient = s.readObject();
- } catch (java.io.OptionalDataException e) {
- // JDK 1.1 instances will not have this optional data.
- // e.eof will be true to indicate that there is no more
- // data available for this object.
- // If e.eof is not true, throw the exception as it
- // might have been caused by reasons unrelated to
- // componentOrientation.
-
- if (!e.eof) {
- throw (e);
- }
- }
-
- if (orient != null) {
- componentOrientation = (ComponentOrientation)orient;
- } else {
- componentOrientation = ComponentOrientation.UNKNOWN;
- }
-
- if (popups != null) {
- int npopups = popups.size();
- for (int i = 0 ; i < npopups ; i++) {
- PopupMenu popup = (PopupMenu)popups.elementAt(i);
- popup.parent = this;
- }
- }
- }
-
- /**
- * Set the language-sensitive orientation that is to be used to order
- * the elements or text within this component. Language-sensitive
- * LayoutManager and Component subclasses will use this property to
- * determine how to lay out and draw components.
- * <p>
- * At construction time, a component's orientation is set to
- * ComponentOrientation.UNKNOWN, indicating that it has not been specified
- * explicitly. The UNKNOWN orientation behaves the same as
- * ComponentOrientation.LEFT_TO_RIGHT.
- * <p>
- * To set the orientation of a single component, use this method.
- * To apply a ResourceBundle's orientation to an entire component
- * hierarchy, use java.awt.Window.applyResourceBundle.
- *
- * @see java.awt.ComponentOrientation
- * @see java.awt.Window#ApplyResourceBundle(java.util.ResourceBundle)
- *
- * @author Laura Werner, IBM
- */
- public void setComponentOrientation(ComponentOrientation o) {
- ComponentOrientation oldValue = componentOrientation;
- componentOrientation = o;
-
- // This is a bound property, so report the change to
- // any registered listeners. (Cheap if there are none.)
- firePropertyChange("componentOrientation", oldValue, o);
-
- // This could change the preferred size of the Component.
- if (valid) {
- invalidate();
- }
- }
-
- /**
- * Retrieve the language-sensitive orientation that is to be used to order
- * the elements or text within this component. LayoutManager and Component
- * subclasses that wish to respect orientation should call this method to
- * get the component's orientation before performing layout or drawing.
- *
- * @see java.awt.ComponentOrientation
- *
- * @author Laura Werner, IBM
- */
- public ComponentOrientation getComponentOrientation() {
- return componentOrientation;
- }
-
-
- /**
- * This odd class is to help out a native component that has been
- * embedded in a lightweight component. Moving lightweight
- * components around and changing their visibility is not seen
- * by the native window system. This is a feature for lightweights,
- * but a problem for native components that depend upon the
- * lightweights. An instance of this class listens to the lightweight
- * parents of an associated native component (the outer class).
- *
- * @author Timothy Prinzing
- */
- private final class NativeInLightFixer implements ComponentListener, ContainerListener {
-
- NativeInLightFixer() {
- lightParents = new Vector();
- Container p = parent;
- // stash a reference to the components that are being observed so that
- // we can reliably remove ourself as a listener later.
- for (; p.peer instanceof java.awt.peer.LightweightPeer; p = p.parent) {
-
- // register listeners and stash a reference
- p.addComponentListener(this);
- p.addContainerListener(this);
- lightParents.addElement(p);
- }
- // register with the native host (native parent of associated native)
- // to get notified if the top-level lightweight is removed.
- nativeHost = p;
- p.addContainerListener(this);
-
- // kick start the fixup. Since the event isn't looked at
- // we can simulate movement notification.
- componentMoved(null);
- }
-
- // --- ComponentListener -------------------------------------------
-
- /**
- * Invoked when one of the lightweight parents has been resized.
- * This doesn't change the position of the native child so it
- * is ignored.
- */
- public void componentResized(ComponentEvent e) {
- }
-
- /**
- * Invoked when one of the lightweight parents has been moved.
- * The native peer must be told of the new position which is
- * relative to the native container that is hosting the
- * lightweight components.
- */
- public void componentMoved(ComponentEvent e) {
- synchronized (getTreeLock()) {
- int nativeX = x;
- int nativeY = y;
- for(Component c = parent; (c != null) &&
- (c.peer instanceof java.awt.peer.LightweightPeer);
- c = c.parent) {
-
- nativeX += c.x;
- nativeY += c.y;
- }
- if (peer != null) {
- peer.setBounds(nativeX, nativeY, width, height);
- }
- }
- }
-
- /**
- * Invoked when a lightweight parent component has been
- * shown. The associated native component must also be
- * shown if it hasn't had an overriding hide done on it.
- */
- public void componentShown(ComponentEvent e) {
- if (isShowing()) {
- synchronized (getTreeLock()) {
- if (peer != null) {
- peer.show();
- }
- }
- }
- }
-
- /**
- * Invoked when component has been hidden.
- */
- public void componentHidden(ComponentEvent e) {
- if (visible) {
- synchronized (getTreeLock()) {
- if (peer != null) {
- peer.hide();
- }
- }
- }
- }
-
- // --- ContainerListener ------------------------------------
-
- /**
- * Invoked when a component has been added to a lightweight
- * parent. This doesn't effect the native component.
- */
- public void componentAdded(ContainerEvent e) {
- }
-
- /**
- * Invoked when a lightweight parent has been removed.
- * This means the services of this listener are no longer
- * required and it should remove all references (ie
- * registered listeners).
- */
- public void componentRemoved(ContainerEvent e) {
- Component c = e.getChild();
- if (c == Component.this) {
- removeReferences();
- } else {
- int n = lightParents.size();
- for (int i = 0; i < n; i++) {
- Container p = (Container) lightParents.elementAt(i);
- if (p == c) {
- removeReferences();
- break;
- }
- }
- }
- }
-
- /**
- * Remove references to this object so it can be
- * garbage collected.
- */
- void removeReferences() {
- int n = lightParents.size();
- for (int i = 0; i < n; i++) {
- Container c = (Container) lightParents.elementAt(i);
- c.removeComponentListener(this);
- c.removeContainerListener(this);
- }
- nativeHost.removeContainerListener(this);
- }
-
- Vector lightParents;
- Container nativeHost;
- }
-
- /**
- * Initialize JNI field and method IDs
- */
- private static native void initIDs();
-
- }