- /*
- * @(#)Container.java 1.163 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.awt.peer.ContainerPeer;
- import java.awt.peer.ComponentPeer;
- import java.awt.event.KeyEvent;
- import java.awt.event.MouseEvent;
- import java.awt.event.FocusEvent;
- import java.awt.event.ContainerEvent;
- import java.awt.event.ContainerListener;
- import java.io.ObjectOutputStream;
- import java.io.ObjectInputStream;
- import java.io.IOException;
- import java.awt.event.AWTEventListener;
- import java.awt.event.WindowAdapter;
- import java.awt.event.WindowListener;
- import java.awt.event.WindowEvent;
-
- /**
- * A generic Abstract Window Toolkit(AWT) container object is a component
- * that can contain other AWT components.
- * <p>
- * Components added to a container are tracked in a list. The order
- * of the list will define the components' front-to-back stacking order
- * within the container. If no index is specified when adding a
- * component to a container, it will be added to the end of the list
- * (and hence to the bottom of the stacking order).
- * @version 1.163 11/29/01
- * @author Arthur van Hoff
- * @author Sami Shaio
- * @see java.awt.Container#add(java.awt.Component, int)
- * @see java.awt.Container#getComponent(int)
- * @see java.awt.LayoutManager
- * @since JDK1.0
- */
- public class Container extends Component {
-
- /**
- * The number of components in this container.
- * This value can be null.
- * @serial
- * @see getComponent()
- * @see getComponents()
- * @see getComponentCount()
- */
- int ncomponents;
-
- /**
- * The components in this container.
- * @serial
- * @see add()
- * @see getComponents()
- */
- Component component[] = new Component[4];
-
- /**
- * Layout manager for this container.
- * @serial
- * @see doLayout()
- * @see setLayout()
- * @see getLayout()
- */
- LayoutManager layoutMgr;
-
- /**
- * Event router for lightweight components. If this container
- * is native, this dispatcher takes care of forwarding and
- * retargeting the events to lightweight components contained
- * (if any).
- * @serial
- */
- private LightweightDispatcher dispatcher;
-
- /*
- * Internal, cached size information.
- * @serial
- * @see getMaximumSize()
- * @see getPreferredSize()
- */
- private Dimension maxSize;
-
- transient ContainerListener containerListener;
-
- /*
- * JDK 1.1 serialVersionUID
- */
- private static final long serialVersionUID = 4613797578919906343L;
-
- static {
- /* ensure that the necessary native libraries are loaded */
- Toolkit.loadLibraries();
- initIDs();
- }
-
- /**
- * Initialize JNI field and method IDs for fields that may be
- called from C.
- */
- private static native void initIDs();
-
- /**
- * Constructs a new Container. Containers can be extended directly,
- * but are lightweight in this case and must be contained by a parent
- * somewhere higher up in the component tree that is native.
- * (such as Frame for example).
- */
- public Container() {
- }
-
- /**
- * Gets the number of components in this panel.
- * @return the number of components in this panel.
- * @see java.awt.Container#getComponent
- * @since JDK1.1
- */
- public int getComponentCount() {
- return countComponents();
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by getComponentCount().
- */
- public int countComponents() {
- return ncomponents;
- }
-
- /**
- * Gets the nth component in this container.
- * @param n the index of the component to get.
- * @return the n<sup>th</sup> component in this container.
- * @exception ArrayIndexOutOfBoundsException
- * if the n<sup>th</sup> value does not exist.
- */
- public Component getComponent(int n) {
- synchronized (getTreeLock()) {
- if ((n < 0) || (n >= ncomponents)) {
- throw new ArrayIndexOutOfBoundsException("No such child: " + n);
- }
- return component[n];
- }
- }
-
- /**
- * Gets all the components in this container.
- * @return an array of all the components in this container.
- */
- public Component[] getComponents() {
- return getComponents_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 Component[] getComponents_NoClientCode() {
- synchronized (getTreeLock()) {
- Component list[] = new Component[ncomponents];
- System.arraycopy(component, 0, list, 0, ncomponents);
- return list;
- }
- } // getComponents_NoClientCode()
-
- /**
- * Determines the insets of this container, which indicate the size
- * of the container's border.
- * <p>
- * A <code>Frame</code> object, for example, has a top inset that
- * corresponds to the height of the frame's title bar.
- * @return the insets of this container.
- * @see java.awt.Insets
- * @see java.awt.LayoutManager
- * @since JDK1.1
- */
- public Insets getInsets() {
- return insets();
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>getInsets()</code>.
- */
- public Insets insets() {
- if (this.peer != null && this.peer instanceof ContainerPeer) {
- ContainerPeer peer = (ContainerPeer)this.peer;
- return (Insets)peer.insets().clone();
- }
- return new Insets(0, 0, 0, 0);
- }
-
- /**
- * Adds the specified component to the end of this container.
- * @param comp the component to be added.
- * @return the component argument.
- */
- public Component add(Component comp) {
- addImpl(comp, null, -1);
- return comp;
- }
-
- /**
- * Adds the specified component to this container.
- * It is strongly advised to use the 1.1 method, add(Component, Object),
- * in place of this method.
- */
- public Component add(String name, Component comp) {
- addImpl(comp, name, -1);
- return comp;
- }
-
- /**
- * Adds the specified component to this container at the given
- * position.
- * @param comp the component to be added.
- * @param index the position at which to insert the component,
- * or <code>-1</code> to insert the component at the end.
- * @return the component <code>comp</code>
- * @see #remove
- */
- public Component add(Component comp, int index) {
- addImpl(comp, null, index);
- return comp;
- }
-
- /**
- * Adds the specified component to the end of this container.
- * Also notifies the layout manager to add the component to
- * this container's layout using the specified constraints object.
- * @param comp the component to be added
- * @param constraints an object expressing
- * layout contraints for this component
- * @see java.awt.LayoutManager
- * @since JDK1.1
- */
- public void add(Component comp, Object constraints) {
- addImpl(comp, constraints, -1);
- }
-
- /**
- * Adds the specified component to this container with the specified
- * constraints at the specified index. Also notifies the layout
- * manager to add the component to the this container's layout using
- * the specified constraints object.
- * @param comp the component to be added
- * @param constraints an object expressing layout contraints for this
- * @param index the position in the container's list at which to insert
- * the component. -1 means insert at the end.
- * component
- * @see #remove
- * @see LayoutManager
- */
- public void add(Component comp, Object constraints, int index) {
- addImpl(comp, constraints, index);
- }
-
- /**
- * Adds the specified component to this container at the specified
- * index. This method also notifies the layout manager to add
- * the component to this container's layout using the specified
- * constraints object.
- * <p>
- * This is the method to override if a program needs to track
- * every add request to a container. An overriding method should
- * usually include a call to the superclass's version of the method:
- * <p>
- * <blockquote>
- * <code>super.addImpl(comp, constraints, index)</code>
- * </blockquote>
- * <p>
- * @param comp the component to be added.
- * @param constraints an object expressing layout contraints
- * for this component.
- * @param index the position in the container's list at which to
- * insert the component, where <code>-1</code>
- * means insert at the end.
- * @see java.awt.Container#add(java.awt.Component)
- * @see java.awt.Container#add(java.awt.Component, int)
- * @see java.awt.Container#add(java.awt.Component, java.lang.Object)
- * @see java.awt.LayoutManager
- * @since JDK1.1
- */
- protected void addImpl(Component comp, Object constraints, int index) {
- synchronized (getTreeLock()) {
-
- /* Check for correct arguments: index in bounds,
- * comp cannot be one of this container's parents,
- * and comp cannot be a window.
- */
- if (index > ncomponents || (index < 0 && index != -1)) {
- throw new IllegalArgumentException(
- "illegal component position");
- }
- if (comp instanceof Container) {
- for (Container cn = this; cn != null; cn=cn.parent) {
- if (cn == comp) {
- throw new IllegalArgumentException(
- "adding container's parent to itself");
- }
- }
- }
- if (comp instanceof Window) {
- throw new IllegalArgumentException(
- "adding a window to a container");
- }
-
- /* Reparent the component and tidy up the tree's state. */
- if (comp.parent != null) {
- comp.parent.remove(comp);
- }
-
- /* Add component to list; allocate new array if necessary. */
- if (ncomponents == component.length) {
- Component newcomponents[] = new Component[ncomponents * 2];
- System.arraycopy(component, 0, newcomponents, 0, ncomponents);
- component = newcomponents;
- }
- if (index == -1 || index == ncomponents) {
- component[ncomponents++] = comp;
- } else {
- System.arraycopy(component, index, component,
- index + 1, ncomponents - index);
- component[index] = comp;
- ncomponents++;
- }
- comp.parent = this;
- if (valid) {
- invalidate();
- }
- if (peer != null) {
- comp.addNotify();
- }
-
- /* Notify the layout manager of the added component. */
- if (layoutMgr != null) {
- if (layoutMgr instanceof LayoutManager2) {
- ((LayoutManager2)layoutMgr).addLayoutComponent(comp, constraints);
- } else if (constraints instanceof String) {
- layoutMgr.addLayoutComponent((String)constraints, comp);
- }
- }
- if (containerListener != null ||
- (eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0) {
- ContainerEvent e = new ContainerEvent(this,
- ContainerEvent.COMPONENT_ADDED,
- comp);
- processEvent(e);
- }
- }
- }
-
- /**
- * Removes the component, specified by <code>index</code>,
- * from this container.
- * @param index the index of the component to be removed.
- * @see #add
- * @since JDK1.1
- */
- public void remove(int index) {
- synchronized (getTreeLock()) {
- Component comp = component[index];
- if (peer != null) {
- comp.removeNotify();
- }
- if (layoutMgr != null) {
- layoutMgr.removeLayoutComponent(comp);
- }
- comp.parent = null;
- System.arraycopy(component, index + 1,
- component, index,
- ncomponents - index - 1);
- component[--ncomponents] = null;
- if (valid) {
- invalidate();
- }
- if (containerListener != null ||
- (eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0) {
- ContainerEvent e = new ContainerEvent(this,
- ContainerEvent.COMPONENT_REMOVED,
- comp);
- processEvent(e);
- }
- return;
- }
- }
-
- /**
- * Removes the specified component from this container.
- * @param comp the component to be removed
- * @see #add
- */
- public void remove(Component comp) {
- synchronized (getTreeLock()) {
- if (comp.parent == this) {
- /* Search backwards, expect that more recent additions
- * are more likely to be removed.
- */
- Component component[] = this.component;
- for (int i = ncomponents; --i >= 0; ) {
- if (component[i] == comp) {
- remove(i);
- }
- }
- }
- }
- }
-
- /**
- * Removes all the components from this container.
- * @see #add
- * @see #remove
- */
- public void removeAll() {
- synchronized (getTreeLock()) {
- while (ncomponents > 0) {
- Component comp = component[--ncomponents];
- component[ncomponents] = null;
-
- if (peer != null) {
- comp.removeNotify();
- }
- if (layoutMgr != null) {
- layoutMgr.removeLayoutComponent(comp);
- }
- comp.parent = null;
- if (containerListener != null ||
- (eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0) {
- ContainerEvent e = new ContainerEvent(this,
- ContainerEvent.COMPONENT_REMOVED,
- comp);
- processEvent(e);
- }
- }
- if (valid) {
- invalidate();
- }
- }
- }
-
- /**
- * Gets the layout manager for this container.
- * @see #doLayout
- * @see #setLayout
- */
- public LayoutManager getLayout() {
- return layoutMgr;
- }
-
- /**
- * Sets the layout manager for this container.
- * @param mgr the specified layout manager
- * @see #doLayout
- * @see #getLayout
- */
- public void setLayout(LayoutManager mgr) {
- layoutMgr = mgr;
- if (valid) {
- invalidate();
- }
- }
-
- /**
- * Causes this container to lay out its components. Most programs
- * should not call this method directly, but should invoke
- * the <code>validate</code> method instead.
- * @see java.awt.LayoutManager#layoutContainer
- * @see #setLayout
- * @see #validate
- * @since JDK1.1
- */
- public void doLayout() {
- layout();
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>doLayout()</code>.
- */
- public void layout() {
- LayoutManager layoutMgr = this.layoutMgr;
- if (layoutMgr != null) {
- layoutMgr.layoutContainer(this);
- }
- }
-
- /**
- * Invalidates the container. The container 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 #validate
- * @see #layout
- * @see LayoutManager
- */
- public void invalidate() {
- if (layoutMgr instanceof LayoutManager2) {
- LayoutManager2 lm = (LayoutManager2) layoutMgr;
- lm.invalidateLayout(this);
- }
- super.invalidate();
- }
-
- /**
- * Validates this container and all of its subcomponents.
- * <p>
- * AWT uses <code>validate</code> to cause a container to lay out
- * its subcomponents again after the components it contains
- * have been added to or modified.
- * @see #validate
- * @see Component#invalidate
- */
- public void validate() {
- /* Avoid grabbing lock unless really necessary. */
- if (!valid) {
- synchronized (getTreeLock()) {
- if (!valid && peer != null) {
- ContainerPeer p = null;
- if (peer instanceof ContainerPeer) {
- p = (ContainerPeer) peer;
- }
- if (p != null) {
- p.beginValidate();
- }
- validateTree();
- valid = true;
- if (p != null) {
- p.endValidate();
- }
- }
- }
- }
- }
-
- /**
- * Recursively descends the container tree and recomputes the
- * layout for any subtrees marked as needing it (those marked as
- * invalid). Synchronization should be provided by the method
- * that calls this one: <code>validate</code>.
- */
- protected void validateTree() {
- if (!valid) {
- doLayout();
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; ++i) {
- Component comp = component[i];
- if ( (comp instanceof Container)
- && !(comp instanceof Window)
- && !comp.valid) {
- ((Container)comp).validateTree();
- } else {
- comp.validate();
- }
- }
- }
- valid = true;
- }
-
- /**
- * Recursively descends the container tree and invalidates all
- * contained components.
- */
- void invalidateTree() {
- synchronized (getTreeLock()) {
- for (int i = 0; i < ncomponents; ++i) {
- Component comp = component[i];
- if (comp instanceof Container) {
- ((Container)comp).invalidateTree();
- }
- else {
- if (comp.valid) {
- comp.invalidate();
- }
- }
- }
- if (valid) {
- invalidate();
- }
- }
- }
-
- /**
- * Sets the font of this container.
- * @param f The font to become this container's font.
- * @see Component#getFont
- * @since JDK1.0
- */
- public void setFont(Font f) {
- boolean shouldinvalidate = false;
-
- synchronized (this) {
- Font oldfont = getFont();
- super.setFont(f);
- Font newfont = getFont();
- if (newfont != oldfont && (oldfont == null ||
- !oldfont.equals(newfont))) {
- shouldinvalidate = true;
- }
- }
-
- if (shouldinvalidate) {
- invalidateTree();
- }
- }
-
- /**
- * Returns the preferred size of this container.
- * @return an instance of <code>Dimension</code> that represents
- * the preferred size of this container.
- * @see java.awt.Container#getMinimumSize
- * @see java.awt.Container#getLayout
- * @see java.awt.LayoutManager#preferredLayoutSize(java.awt.Container)
- * @see java.awt.Component#getPreferredSize
- */
- 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 = (layoutMgr != null) ?
- layoutMgr.preferredLayoutSize(this) :
- super.preferredSize();
-
- return prefSize;
- }
- }
-
- /**
- * Returns the minimum size of this container.
- * @return an instance of <code>Dimension</code> that represents
- * the minimum size of this container.
- * @see java.awt.Container#getPreferredSize
- * @see java.awt.Container#getLayout
- * @see java.awt.LayoutManager#minimumLayoutSize(java.awt.Container)
- * @see java.awt.Component#getMinimumSize
- * @since JDK1.1
- */
- 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 = (layoutMgr != null) ?
- layoutMgr.minimumLayoutSize(this) :
- super.minimumSize();
- return minSize;
- }
- }
-
- /**
- * Returns the maximum size of this container.
- * @see #getPreferredSize
- */
- public Dimension getMaximumSize() {
- /* Avoid grabbing the lock if a reasonable cached size value
- * is available.
- */
- Dimension dim = maxSize;
- if (dim != null && isValid()) {
- return dim;
- }
- if (layoutMgr instanceof LayoutManager2) {
- synchronized (getTreeLock()) {
- LayoutManager2 lm = (LayoutManager2) layoutMgr;
- maxSize = lm.maximumLayoutSize(this);
- }
- } else {
- maxSize = super.getMaximumSize();
- }
- return maxSize;
- }
-
- /**
- * 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() {
- float xAlign;
- if (layoutMgr instanceof LayoutManager2) {
- synchronized (getTreeLock()) {
- LayoutManager2 lm = (LayoutManager2) layoutMgr;
- xAlign = lm.getLayoutAlignmentX(this);
- }
- } else {
- xAlign = super.getAlignmentX();
- }
- return xAlign;
- }
-
- /**
- * 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() {
- float yAlign;
- if (layoutMgr instanceof LayoutManager2) {
- synchronized (getTreeLock()) {
- LayoutManager2 lm = (LayoutManager2) layoutMgr;
- yAlign = lm.getLayoutAlignmentY(this);
- }
- } else {
- yAlign = super.getAlignmentY();
- }
- return yAlign;
- }
-
- /**
- * Paints the container. This forwards the paint to any lightweight components
- * that are children of this container. If this method is reimplemented,
- * super.paint(g) should be called so that lightweight components are properly
- * rendered. If a child component is entirely clipped by the current clipping
- * setting in g, paint() will not be forwarded to that child.
- *
- * @param g the specified Graphics window
- * @see java.awt.Component#update(java.awt.Graphics)
- */
- public void paint(Graphics g) {
- if (isShowing()) {
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- Rectangle clip = g.getClipRect();
- for (int i = ncomponents - 1 ; i >= 0 ; i--) {
- Component comp = component[i];
- if (comp != null &&
- comp.peer instanceof java.awt.peer.LightweightPeer &&
- comp.visible == true) {
-
- Rectangle cr = comp.getBounds();
- if (( clip == null ) || cr.intersects(clip)) {
- Graphics cg = g.create(cr.x, cr.y, cr.width, cr.height);
- cg.setFont(comp.getFont());
- try {
- comp.paint(cg);
- } finally {
- cg.dispose();
- }
- }
- }
- }
- }
- }
-
- /**
- * Updates the container. This forwards the update to any lightweight components
- * that are children of this container. If this method is reimplemented,
- * super.update(g) should be called so that lightweight components are properly
- * rendered. If a child component is entirely clipped by the current clipping
- * setting in g, update() will not be forwarded to that child.
- *
- * @param g the specified Graphics window
- * @see java.awt.Component#update(java.awt.Graphics)
- */
- public void update(Graphics g) {
- if (isShowing()) {
- if (! (peer instanceof java.awt.peer.LightweightPeer)) {
- g.clearRect(0, 0, width, height);
- }
- paint(g);
- }
- }
-
- /**
- * Prints the container. This forwards the print to any lightweight components
- * that are children of this container. If this method is reimplemented,
- * super.print(g) should be called so that lightweight components are properly
- * rendered. If a child component is entirely clipped by the current clipping
- * setting in g, print() will not be forwarded to that child.
- *
- * @param g the specified Graphics window
- * @see java.awt.Component#update(java.awt.Graphics)
- */
- public void print(Graphics g) {
- super.print(g); // By default, Component.print() calls paint()
-
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- Rectangle clip = g.getClipRect();
- for (int i = ncomponents - 1 ; i >= 0 ; i--) {
- Component comp = component[i];
- if (comp != null &&
- comp.peer instanceof java.awt.peer.LightweightPeer) {
- Rectangle cr = comp.getBounds();
- if ((clip == null) || cr.intersects(clip)) {
- Graphics cg = g.create(cr.x, cr.y, cr.width, cr.height);
- try {
- comp.print(cg);
- } finally {
- cg.dispose();
- }
- }
- }
- }
- }
-
- /**
- * Paints each of the components in this container.
- * @param g the graphics context.
- * @see java.awt.Component#paint
- * @see java.awt.Component#paintAll
- */
- public void paintComponents(Graphics g) {
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = ncomponents - 1 ; i >= 0 ; i--) {
- Component comp = component[i];
- if (comp != null) {
- Graphics cg = comp.getGraphics();
- if (cg != null) {
- Rectangle parentRect = g.getClipRect();
-
- // Calculate the clipping region of the child's graphics
- // context, by taking the intersection of the parent's
- // clipRect (if any) and the child's bounds, and then
- // translating it's coordinates to be relative to the
- // child.
- if (parentRect != null) {
- Rectangle childRect = comp.getBounds();
- if (childRect.intersects(parentRect) == false) {
- // Child component is completely clipped out:
- // ignore.
- continue;
- }
- Rectangle childClipRect =
- childRect.intersection(parentRect);
- childClipRect.translate(-childRect.x, -childRect.y);
- cg.clipRect(childClipRect.x, childClipRect.y,
- childClipRect.width, childClipRect.height);
- }
-
- try {
- comp.paintAll(cg);
- } finally {
- cg.dispose();
- }
- }
- }
- }
- }
-
- /**
- * Prints each of the components in this container.
- * @param g the graphics context.
- * @see java.awt.Component#print
- * @see java.awt.Component#printAll
- */
- public void printComponents(Graphics g) {
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
-
- // A seriously sad hack--
- // Lightweight components always paint behind peered components,
- // even if they are at the top of the Z order. We emulate this
- // behavior by making two printing passes: the first for lightweights;
- // the second for heavyweights.
-
- for (int i = ncomponents - 1 ; i >= 0 ; i--) {
- Component comp = component[i];
- if (comp != null &&
- comp.peer instanceof java.awt.peer.LightweightPeer) {
- printOneComponent(g, comp);
- }
- }
- for (int i = ncomponents - 1 ; i >= 0 ; i--) {
- Component comp = component[i];
- if (comp != null &&
- !(comp.peer instanceof java.awt.peer.LightweightPeer)) {
- printOneComponent(g, comp);
- }
- }
- }
-
- private void printOneComponent(Graphics g, Component comp) {
- Graphics cg = g.create(comp.x, comp.y, comp.width,
- comp.height);
- cg.setFont(comp.getFont());
- try {
- comp.printAll(cg);
- } finally {
- cg.dispose();
- }
- }
-
- /**
- * Simulates the peer callbacks into java.awt for printing of
- * lightweight Containers.
- * @param g the graphics context to use for printing.
- * @see Component#printAll
- * @see #printComponents
- */
- void lightweightPrint(Graphics g) {
- super.lightweightPrint(g);
- printHeavyweightComponents(g);
- }
-
- /**
- * Prints all the heavyweight subcomponents.
- */
- void printHeavyweightComponents(Graphics g) {
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = ncomponents - 1 ; i >= 0 ; i--) {
- Component comp = component[i];
- if (comp != null) {
- if (!(comp.peer instanceof java.awt.peer.LightweightPeer)) {
- printOneComponent(g, comp);
- } else {
- Graphics cg = g.create(comp.x, comp.y,
- comp.width, comp.height);
- cg.setFont(comp.getFont());
- try {
- comp.printHeavyweightComponents(cg);
- } finally {
- cg.dispose();
- }
- }
- }
- }
- }
-
- /**
- * Adds the specified container listener to receive container events
- * from this container.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the container listener
- */
- public synchronized void addContainerListener(ContainerListener l) {
- if (l == null) {
- return;
- }
- containerListener = AWTEventMulticaster.add(containerListener, l);
- newEventsOnly = true;
- }
-
- /**
- * Removes the specified container listener so it no longer receives
- * container events from this container.
- * If l is null, no exception is thrown and no action is performed.
- *
- * @param l the container listener
- */
- public synchronized void removeContainerListener(ContainerListener l) {
- if (l == null) {
- return;
- }
- containerListener = AWTEventMulticaster.remove(containerListener, l);
- }
-
- // REMIND: remove when filtering is done at lower level
- boolean eventEnabled(AWTEvent e) {
- int id = e.getID();
-
- if (id == ContainerEvent.COMPONENT_ADDED ||
- id == ContainerEvent.COMPONENT_REMOVED) {
- if ((eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0 ||
- containerListener != null) {
- return true;
- }
- return false;
- }
- return super.eventEnabled(e);
- }
-
- /**
- * Processes events on this container. If the event is a ContainerEvent,
- * it invokes the processContainerEvent method, else it invokes its
- * superclass's processEvent.
- * @param e the event
- */
- protected void processEvent(AWTEvent e) {
- if (e instanceof ContainerEvent) {
- processContainerEvent((ContainerEvent)e);
- return;
- }
- super.processEvent(e);
- }
-
- /**
- * Processes container events occurring on this container by
- * dispatching them to any registered ContainerListener objects.
- * NOTE: This method will not be called unless container events
- * are enabled for this component; this happens when one of the
- * following occurs:
- * a) A ContainerListener object is registered via addContainerListener()
- * b) Container events are enabled via enableEvents()
- * @see Component#enableEvents
- * @param e the container event
- */
- protected void processContainerEvent(ContainerEvent e) {
- if (containerListener != null) {
- switch(e.getID()) {
- case ContainerEvent.COMPONENT_ADDED:
- containerListener.componentAdded(e);
- break;
- case ContainerEvent.COMPONENT_REMOVED:
- containerListener.componentRemoved(e);
- break;
- }
- }
- }
-
- /*
- * Dispatches an event to this component or one of its sub components.
- * @param e the event
- */
- void dispatchEventImpl(AWTEvent e) {
- if ((dispatcher != null) && dispatcher.dispatchEvent(e)) {
- // event was sent to a lightweight component. The
- // native-produced event sent to the native container
- // must be properly disposed of by the peer, so it
- // gets forwarded. If the native host has been removed
- // as a result of the sending the lightweight event,
- // the peer reference will be null.
- e.consume();
- if (peer != null) {
- peer.handleEvent(e);
- }
- return;
- }
- super.dispatchEventImpl(e);
- }
-
- /*
- * Dispatches an event to this component, without trying to forward
- * it to any sub components
- * @param e the event
- */
- void dispatchEventToSelf(AWTEvent e) {
- super.dispatchEventImpl(e);
- }
-
- /**
- * Fetchs the top-most (deepest) lightweight component that is interested
- * in receiving mouse events.
- */
- Component getMouseEventTarget(int x, int y, boolean includeSelf) {
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; i++) {
- Component comp = component[i];
- if ((comp != null) && (comp.contains(x - comp.x, y - comp.y)) &&
- (comp.peer instanceof java.awt.peer.LightweightPeer) &&
- (comp.visible == true)) {
- // found a component that intersects the point, see if there is
- // a deeper possibility.
- if (comp instanceof Container) {
- Container child = (Container) comp;
- Component deeper = child.getMouseEventTarget(x - child.x, y - child.y, includeSelf);
- if (deeper != null) {
- return deeper;
- }
- } else {
- if ((comp.mouseListener != null) ||
- ((comp.eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0) ||
- (comp.mouseMotionListener != null) ||
- ((comp.eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0)) {
- // there isn't a deeper target, but this component is a target
- return comp;
- }
- }
- }
- }
-
- boolean isPeerOK;
- boolean isMouseOverMe;
- boolean isMouseListener;
- boolean isMotionListener;
-
- isPeerOK = (peer instanceof java.awt.peer.LightweightPeer) || includeSelf;
- isMouseOverMe = contains(x,y);
- isMouseListener = (mouseListener != null) ||
- ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0);
- isMotionListener = (mouseMotionListener != null) ||
- ((eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0);
-
- // didn't find a child target, return this component if it's a possible target
- if ( isMouseOverMe && isPeerOK && (isMouseListener || isMotionListener) ) {
- return this;
- }
- // no possible target
- return null;
- }
-
- /*
- * Set the cursor image to a predefined cursor.
- * @param <code>cursor</code> One of the constants defined
- * by the <code>Cursor</code> class.
- * @see java.awt.Component#getCursor
- * @see java.awt.Cursor
- * @since JDK1.1
- */
- public synchronized void setCursor(Cursor cursor) {
- if (dispatcher != null) {
- Component cursorOn = dispatcher.getCursorOn();
-
- // if mouse is on a lightweight component, we should not
- // call setCursor on the nativeContainer
- if (cursorOn != null) {
- this.cursor = cursor;
-
- // it could be that cursorOn will inherit cursor
- dispatcher.updateCursor(cursorOn);
- return;
- }
- }
- super.setCursor(cursor);
- }
-
- /**
- * Update the cursor is decided by the dispatcher
- * This method is used when setCursor on a lightweight
- */
- void updateCursor(Component comp) {
- if (dispatcher != null) {
- dispatcher.updateCursor(comp);
- }
- }
-
- /**
- * Fetchs the top-most (deepest) lightweight component whose cursor
- * should be displayed.
- */
- Component getCursorTarget(int x, int y) {
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; i++) {
- Component comp = component[i];
- if ((comp != null) && (comp.contains(x - comp.x, y - comp.y)) &&
- (comp.visible == true)) {
- // found a component that intersects the point, see if there is
- // a deeper possibility.
- if (comp instanceof Container) {
- Container child = (Container) comp;
- Component deeper = child.getCursorTarget(x - child.x, y - child.y);
- if (deeper != null) {
- return deeper;
- }
- } else {
- return comp;
- }
- }
- }
-
- if (contains(x,y) && (peer instanceof java.awt.peer.LightweightPeer)) {
- return this;
- }
-
- // no possible target
- return null;
- }
-
-
- /**
- * This is called by lightweight components that want the containing
- * windowed parent to enable some kind of events on their behalf.
- * This is needed for events that are normally only dispatched to
- * windows to be accepted so that they can be forwarded downward to
- * the lightweight component that has enabled them.
- */
- void proxyEnableEvents(long events) {
- if (peer instanceof java.awt.peer.LightweightPeer) {
- // this container is lightweight.... continue sending it
- // upward.
- parent.proxyEnableEvents(events);
- } else {
- // This is a native container, so it needs to host
- // one of it's children. If this function is called before
- // a peer has been created we don't yet have a dispatcher
- // because it has not yet been determined if this instance
- // is lightweight.
- if (dispatcher != null) {
- dispatcher.enableEvents(events);
- }
- }
- }
-
- Window getWindow() {
- Container w = this;
- while( !(w instanceof Window) ) {
- w = w.getParent();
- }
- return (Window)w;
- }
-
- /**
- * This is called by lightweight components that have requested focus.
- * The focus request is propagated upward until a native container is
- * found, at which point the native container requests focus and records
- * the component the host is requesting focus for.
- */
- void proxyRequestFocus(Component c) {
- if (peer instanceof java.awt.peer.LightweightPeer) {
- // this container is lightweight... continue sending it
- // upward.
- parent.proxyRequestFocus(c);
- } else {
- // This is a windowed container, so record true focus
- // component and request focus from the native window
- // if needed.
- if (dispatcher.setFocusRequest(c)) {
- // If the focus is currently somewhere within this Window,
- // call the peer to set focus to this Container. This way,
- // we avoid activating this Window if it's not currently
- // active. -fredx, 2-19-98, bug #4111098
- Component window = this;
- while (!(window instanceof Window))
- window = window.getParent();
- if (((Window)window).isActive() ||
- ! (window instanceof Frame || window instanceof Dialog) ) {
- peer.requestFocus();
- }
- Toolkit.getEventQueue().changeKeyEventFocus(this);
- }
- }
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>dispatchEvent(AWTEvent e)</code>
- */
- public void deliverEvent(Event e) {
- Component comp = getComponentAt(e.x, e.y);
- if ((comp != null) && (comp != this)) {
- e.translate(-comp.x, -comp.y);
- comp.deliverEvent(e);
- } else {
- postEvent(e);
- }
- }
-
- /**
- * Locates the component that contains the x,y position. The
- * top-most child component is returned in the case where there
- * is overlap in the components. This is determined by finding
- * the component closest to the index 0 that claims to contain
- * the given point via Component.contains().
- * @param x the <i>x</i> coordinate
- * @param y the <i>y</i> coordinate
- * @return null if the component does not contain the position.
- * If there is no child component at the requested point and the
- * point is within the bounds of the container the container itself
- * is returned; otherwise the top-most child is returned.
- * @see Component#contains
- * @since JDK1.1
- */
- public Component getComponentAt(int x, int y) {
- return locate(x, y);
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by <code>getComponentAt(int, int)</code>.
- */
- public Component locate(int x, int y) {
- if (!contains(x, y)) {
- return null;
- }
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; i++) {
- Component comp = component[i];
- if (comp != null) {
- if (comp.contains(x - comp.x, y - comp.y)) {
- return comp;
- }
- }
- }
- return this;
- }
-
- /**
- * Gets the component that contains the specified point.
- * @param p the point.
- * @return returns the component that contains the point,
- * or <code>null</code> if the component does
- * not contain the point.
- * @see java.awt.Component#contains
- * @since JDK1.1
- */
- public Component getComponentAt(Point p) {
- return getComponentAt(p.x, p.y);
- }
-
- /**
- * Locates the visible child component that contains the specified
- * position. The top-most child component is returned in the case
- * where there is overlap in the components. If the containing child
- * component is a Container, this method will continue searching for
- * the deepest nested child component. Components which are not
- * visible are ignored during the search.<p>
- *
- * The findComponentAt method is different from getComponentAt in
- * that getComponentAt only searches the Container's immediate
- * children; if the containing component is a Container,
- * findComponentAt will search that child to find a nested component.
- *
- * @param x the <i>x</i> coordinate
- * @param y the <i>y</i> coordinate
- * @return null if the component does not contain the position.
- * If there is no child component at the requested point and the
- * point is within the bounds of the container the container itself
- * is returned.
- * @see Component#contains
- * @see getComponentAt
- * @since JDK1.2
- */
- public Component findComponentAt(int x, int y) {
- if (!contains(x, y)) {
- return null;
- }
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; i++) {
- Component comp = component[i];
- if (comp != null) {
- if (comp instanceof Container) {
- comp = ((Container)comp).findComponentAt(x - comp.x,
- y - comp.y);
- } else {
- comp = comp.locate(x - comp.x, y - comp.y);
- }
- if (comp != null && comp.isVisible()) {
- return comp;
- }
- }
- }
- return this;
- }
-
- /**
- * Locates the visible child component that contains the specified
- * point. The top-most child component is returned in the case
- * where there is overlap in the components. If the containing child
- * component is a Container, this method will continue searching for
- * the deepest nested child component. Components which are not
- * visible are ignored during the search.<p>
- *
- * The findComponentAt method is different from getComponentAt in
- * that getComponentAt only searches the Container's immediate
- * children; if the containing component is a Container,
- * findComponentAt will search that child to find a nested component.
- *
- * @param p the point.
- * @return null if the component does not contain the position.
- * If there is no child component at the requested point and the
- * point is within the bounds of the container the container itself
- * is returned.
- * @see Component#contains
- * @see getComponentAt
- * @since JDK1.2
- */
- public Component findComponentAt(Point p) {
- return findComponentAt(p.x, p.y);
- }
-
- /**
- * Makes this Container displayable by connecting it to
- * a native screen resource. Making a container displayable will
- * cause any of its children to be made displayable.
- * This method is called internally by the toolkit and should
- * not be called directly by programs.
- * @see Component#isDisplayable
- * @see #removeNotify
- */
- public void addNotify() {
- synchronized (getTreeLock()) {
- // addNotify() on the children may cause proxy event enabling
- // on this instance, so we first call super.addNotify() and
- // possibly create an lightweight event dispatcher before calling
- // addNotify() on the children which may be lightweight.
- super.addNotify();
- if (! (peer instanceof java.awt.peer.LightweightPeer)) {
- dispatcher = new LightweightDispatcher(this);
- }
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; i++) {
- component[i].addNotify();
- }
- }
- }
-
- /**
- * Makes this Container undisplayable by removing its connection
- * to its native screen resource. Make a container undisplayable
- * will cause any of its children to be made undisplayable.
- * This method is called by the toolkit internally and should
- * not be called directly by programs.
- * @see Component#isDisplayable
- * @see #addNotify
- */
- public void removeNotify() {
- synchronized (getTreeLock()) {
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; i++) {
- component[i].removeNotify();
- }
- if ( dispatcher != null ) {
- dispatcher.dispose();
- }
- super.removeNotify();
- }
- }
-
- /**
- * Checks if the component is contained in the component hierarchy of
- * this container.
- * @param c the component
- * @return <code>true</code> if it is an ancestor;
- * <code>false</code> otherwise.
- * @since JDK1.1
- */
- public boolean isAncestorOf(Component c) {
- Container p;
- if (c == null || ((p = c.getParent()) == null)) {
- return false;
- }
- while (p != null) {
- if (p == this) {
- return true;
- }
- p = p.getParent();
- }
- return false;
- }
-
- /**
- * Returns the parameter string representing the state of this
- * container. This string is useful for debugging.
- * @return the parameter string of this container.
- */
- protected String paramString() {
- String str = super.paramString();
- LayoutManager layoutMgr = this.layoutMgr;
- if (layoutMgr != null) {
- str += ",layout=" + layoutMgr.getClass().getName();
- }
- return str;
- }
-
- /**
- * Prints a listing of this container to the specified output
- * stream. The listing starts at the specified indentation.
- * @param out a print stream.
- * @param indent the number of spaces to indent.
- * @see java.awt.Component#list(java.io.PrintStream, int)
- * @since JDK
- */
- public void list(PrintStream out, int indent) {
- super.list(out, indent);
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; i++) {
- Component comp = component[i];
- if (comp != null) {
- comp.list(out, indent+1);
- }
- }
- }
-
- /**
- * Prints out a list, starting at the specified indention, to the specified
- * print writer.
- */
- public void list(PrintWriter out, int indent) {
- super.list(out, indent);
- int ncomponents = this.ncomponents;
- Component component[] = this.component;
- for (int i = 0 ; i < ncomponents ; i++) {
- Component comp = component[i];
- if (comp != null) {
- comp.list(out, indent+1);
- }
- }
- }
-
- void setFocusOwner(Component c) {
- Container parent = this.parent;
- if (parent != null) {
- parent.setFocusOwner(c);
- }
- }
-
- void preProcessKeyEvent(KeyEvent e) {
- Container parent = this.parent;
- if (parent != null) {
- parent.preProcessKeyEvent(e);
- }
- }
-
- void postProcessKeyEvent(KeyEvent e) {
- Container parent = this.parent;
- if (parent != null) {
- parent.postProcessKeyEvent(e);
- }
- }
-
- void transferFocus(Component base) {
- nextFocus(base);
- }
-
- boolean postsOldMouseEvents() {
- return true;
- }
-
- /**
- * @deprecated As of JDK version 1.1,
- * replaced by transferFocus(Component).
- */
- void nextFocus(Component base) {
- Container parent = this.parent;
- if (parent != null) {
- parent.transferFocus(base);
- }
- }
-
- /**
- * Package-visible utility to set the orientation of this container
- * and all components contained within it.
- * @since JDK1.2
- * @see java.awt.Window#applyResourceBundle(java.util.ResourceBundle)
- */
- void applyOrientation(ComponentOrientation o) {
- setComponentOrientation(o);
-
- for (int i = 0 ; i < ncomponents ; ++i) {
- Component comp = component[i];
- if (comp instanceof Container) {
- ((Container)comp).applyOrientation(o);
- } else {
- comp.setComponentOrientation(o);
- }
- }
- }
-
- /* Serialization support. A Container is responsible for
- * restoring the parent fields of its component children.
- */
- /*
- * Container Serial Data Version.
- * @serial
- */
- private int containerSerializedDataVersion = 1;
-
- /**
- * Writes default serializable fields to stream. Writes
- * a list of serializable ItemListener(s) as optional data.
- * The non-serializable ItemListner(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, containerListenerK, containerListener);
- s.writeObject(null);
- }
-
- /*
- * Read the ObjectInputStream and if it isnt null
- * add a listener to receive item events fired
- * by the component in the container.
- * Unrecognised keys or values will be Ignored.
- * @serial
- * @see removeActionListener()
- * @see addActionListener()
- */
- private void readObject(ObjectInputStream s)
- throws ClassNotFoundException, IOException
- {
- s.defaultReadObject();
-
- Component component[] = this.component;
- for(int i = 0; i < ncomponents; i++)
- component[i].parent = this;
-
- Object keyOrNull;
- while(null != (keyOrNull = s.readObject())) {
- String key = ((String)keyOrNull).intern();
-
- if (containerListenerK == key)
- addContainerListener((ContainerListener)(s.readObject()));
-
- else // skip value for unrecognized key
- s.readObject();
- }
- }
- }
-
-
- /**
- * Class to manage the dispatching of events to the lightweight
- * components contained by a native container.
- *
- * @author Timothy Prinzing
- */
- class LightweightDispatcher implements java.io.Serializable, AWTEventListener {
-
- /*
- * JDK 1.1 serialVersionUID
- */
- private static final long serialVersionUID = 5184291520170872969L;
- /*
- * Our own mouse event for when we're dragged over from another hw container
- */
- private static final int LWD_MOUSE_DRAGGED_OVER = AWTEvent.RESERVED_ID_MAX + 1;
-
- LightweightDispatcher(Container nativeContainer) {
- this.nativeContainer = nativeContainer;
- focus = null;
- mouseEventTarget = null;
- eventMask = 0;
- }
-
- /*
- * Clean up any resources allocated when dispatcher was created;
- * should be called from Container.removeNotify
- */
- void dispose() {
- //System.out.println("Disposing lw dispatcher");
- stopListeningForOtherDrags();
- }
-
- /**
- * Enables events to lightweight components.
- */
- void enableEvents(long events) {
- eventMask |= events;
- }
-
- /**
- * This is called by the hosting native container on behalf of lightweight
- * components that have requested focus. The focus request is propagated
- * upward from the requesting lightweight component until a windowed host
- * is found, at which point the windowed host calls this method. This method
- * returns whether or not the peer associated with the native component needs
- * to request focus from the native window system.
- *
- * If a lightweight component already has focus the focus events are synthesized
- * since there will be no native events to drive the focus. If the native host
- * already has focus, the focus gained is synthesized for the lightweight component
- * requesting focus since it will receive no native focus requests.
- */
- boolean setFocusRequest(Component c) {
- boolean peerNeedsRequest = true;
- Window w = nativeContainer.getWindow();
- if (w != null && c != null) {
- Component focusOwner = w.getFocusOwner();
- if (focusOwner == null) {
-
- // No focus in this component
- focus = c;
-
- } else if (focusOwner == nativeContainer) {
- // This container already has focus, so just
- // send a FOCUS_LOST event to the container
- // and FOCUS_GAINED event to lightweight component
-
- nativeContainer.dispatchEvent(new FocusEvent(nativeContainer, FocusEvent.FOCUS_LOST, false));
- focus = c ;
- c.dispatchEvent(new FocusEvent(c, FocusEvent.FOCUS_GAINED, false));
-
- peerNeedsRequest = false;
- } else if (focusOwner == c) {
- // lightweight already has the focus
- focus = c ;
- peerNeedsRequest = false;
- } else if (focusOwner == focus) {
- // a lightweight component has focus currently and a new one has been
- // requested. There won't be any window-system events associated with
- // this so we go ahead and send FOCUS_LOST for the old and FOCUS_GAINED
- // for the new.
- if (focus != null) {
- focus.dispatchEvent(new FocusEvent(focus,
- FocusEvent.FOCUS_LOST,
- false));
- }
- focus = c ;
- c.dispatchEvent(new FocusEvent(c, FocusEvent.FOCUS_GAINED, false));
- peerNeedsRequest = false;
- } else {
- //Fix for bug 4095214
- //Paul Sheehan
- focus = c;
- }
- }
- return peerNeedsRequest;
- }
-
- /**
- * Dispatches an event to a lightweight sub-component if necessary, and
- * returns whether or not the event was forwarded to a lightweight
- * sub-component.
- *
- * @param e the event
- */
- boolean dispatchEvent(AWTEvent e) {
- boolean ret = false;
- if ((eventMask & PROXY_EVENT_MASK) != 0) {
- if ((e instanceof MouseEvent) &&
- ((eventMask & MOUSE_MASK) != 0)) {
-
- MouseEvent me = (MouseEvent) e;
- ret = processMouseEvent(me);
-
- } else if (e instanceof FocusEvent) {
-
- FocusEvent fe = (FocusEvent) e;
- ret = processFocusEvent(fe);
-
- } else if (e instanceof KeyEvent) {
-
- KeyEvent ke = (KeyEvent) e;
- ret = processKeyEvent(ke);
-
- }
- }
-
- if (e instanceof MouseEvent) {
- // find out what component the mouse moved in
- MouseEvent me = (MouseEvent) e;
-
- if (me.getID() == MouseEvent.MOUSE_MOVED) {
- cursorOn = nativeContainer.getCursorTarget(me.getX(), me.getY());
- updateCursor(cursorOn);
- }
- }
- return ret;
- }
-
- private boolean processKeyEvent(KeyEvent e) {
- if (focus != null) {
- // Don't duplicate the event here.
- // The KeyEvent for LightWeightComponent is also passed to
- // input methods and their native handlers. The native handlers
- // require the original native event data to be attached to
- // the KeyEvent.
- Component source = e.getComponent();
- ((AWTEvent)e).setSource(focus);
- focus.dispatchEvent(e);
- ((AWTEvent)e).setSource(source);
- return e.isConsumed();
- }
- return false;
- }
-
- private boolean processFocusEvent(FocusEvent e) {
- if (focus != null) {
- int id = e.getID();
- FocusEvent retargeted = new FocusEvent(focus, id, e.isTemporary());
- ((AWTEvent)e).copyPrivateDataInto(retargeted);
- focus.dispatchEvent(retargeted);
- if ((id == FocusEvent.FOCUS_LOST) && (e.isTemporary() == false)) {
- focus = null;
- }
- return true;
- }
- return false;
- }
-
- /**
- * This method attempts to distribute a mouse event to a lightweight
- * component. It tries to avoid doing any unnecessary probes down
- * into the component tree to minimize the overhead of determining
- * where to route the event, since mouse movement events tend to
- * come in large and frequent amounts.
- */
- private boolean processMouseEvent(MouseEvent e) {
- int id = e.getID();
- Component targetOver;
- Component lwOver;
-
- targetOver = nativeContainer.getMouseEventTarget(e.getX(), e.getY(),true);
- trackMouseEnterExit(targetOver, e);
-
- if (mouseEventTarget == null) {
- if ( id == MouseEvent.MOUSE_MOVED ||
- id == MouseEvent.MOUSE_PRESSED ) {
- lwOver = (targetOver != nativeContainer) ? targetOver : null;
- setMouseTarget(lwOver,e);
- }
- }
-
- if (mouseEventTarget != null) {
- // we are currently forwarding to some component, check
- // to see if we should continue to forward.
- switch(id) {
- case MouseEvent.MOUSE_DRAGGED:
- if(dragging) {
- retargetMouseEvent(mouseEventTarget, id, e);
- }
- break;
- case MouseEvent.MOUSE_PRESSED:
- dragging = true;
- retargetMouseEvent(mouseEventTarget, id, e);
- break;
- case MouseEvent.MOUSE_RELEASED:
- {
- Component releasedTarget = mouseEventTarget;
- dragging = false;
- retargetMouseEvent(mouseEventTarget, id, e);
- lwOver = nativeContainer.getMouseEventTarget(e.getX(), e.getY(),false);
- setMouseTarget(lwOver, e);
-
- // fix 4155217
- // component was hidden or moved in user code MOUSE_RELEASED handling
- isClickOrphaned = lwOver != releasedTarget;
- break;
- }
-
- case MouseEvent.MOUSE_CLICKED:
- if (!isClickOrphaned) {
- // fix 4155217
- // click event should not be redirected since component has moved or hidden
- retargetMouseEvent(mouseEventTarget, id, e);
- }
- isClickOrphaned = false;
- break;
- case MouseEvent.MOUSE_ENTERED:
- break;
- case MouseEvent.MOUSE_EXITED:
- if (!dragging) {
- setMouseTarget(null, e);
- }
- break;
- case MouseEvent.MOUSE_MOVED:
- lwOver = nativeContainer.getMouseEventTarget(e.getX(), e.getY(),false);
- setMouseTarget(lwOver, e);
- retargetMouseEvent(mouseEventTarget, id, e);
- break;
- }
- e.consume();
- }
-
- return e.isConsumed();
- }
-
- /**
- * Change the current target of mouse events.
- */
- private void setMouseTarget(Component target, MouseEvent e) {
- if (target != mouseEventTarget) {
- //System.out.println("setMouseTarget: " + target);
- mouseEventTarget = target;
- }
- }
-
- /*
- * Generates enter/exit events as mouse moves over lw components
- * @param targetOver Target mouse is over (including native container)
- * @param e Mouse event in native container
- */
- private void trackMouseEnterExit(Component targetOver, MouseEvent e) {
- Component targetEnter = null;
- int id = e.getID();
-
- if ( id != MouseEvent.MOUSE_EXITED &&
- id != MouseEvent.MOUSE_DRAGGED &&
- id != LWD_MOUSE_DRAGGED_OVER &&
- isMouseInNativeContainer == false ) {
- // any event but an exit or drag means we're in the native container
- isMouseInNativeContainer = true;
- startListeningForOtherDrags();
- } else if ( id == MouseEvent.MOUSE_EXITED ) {
- isMouseInNativeContainer = false;
- stopListeningForOtherDrags();
- }
-
- if (isMouseInNativeContainer) {
- targetEnter = targetOver;
- }
- //System.out.println("targetEnter = " + targetEnter);
- //System.out.println("targetLastEntered = " + targetLastEntered);
-
- if (targetLastEntered == targetEnter) {
- return;
- }
-
- retargetMouseEvent(targetLastEntered, MouseEvent.MOUSE_EXITED, e);
- if (id == MouseEvent.MOUSE_EXITED) {
- // consume native exit event if we generate one
- e.consume();
- }
-
- retargetMouseEvent(targetEnter, MouseEvent.MOUSE_ENTERED, e);
- if (id == MouseEvent.MOUSE_ENTERED) {
- // consume native enter event if we generate one
- e.consume();
- }
-
- //System.out.println("targetLastEntered: " + targetLastEntered);
- targetLastEntered = targetEnter;
- }
-
- /*
- * Listens to global mouse drag events so even drags originating
- * from other heavyweight containers will generate enter/exit
- * events in this container
- */
- private void startListeningForOtherDrags() {
- //System.out.println("Adding AWTEventListener");
- java.security.AccessController.doPrivileged(
- new java.security.PrivilegedAction() {
- public Object run() {
- nativeContainer.getToolkit().addAWTEventListener(
- LightweightDispatcher.this,
- AWTEvent.MOUSE_EVENT_MASK |
- AWTEvent.MOUSE_MOTION_EVENT_MASK);
- return null;
- }
- }
- );
- }
-
- private void stopListeningForOtherDrags() {
- //System.out.println("Removing AWTEventListener");
- java.security.AccessController.doPrivileged(
- new java.security.PrivilegedAction() {
- public Object run() {
- nativeContainer.getToolkit().removeAWTEventListener(LightweightDispatcher.this);
- return null;
- }
- }
- );
- }
-
- /*
- * (Implementation of AWTEventListener)
- * Listen for drag events posted in other hw components so we can
- * track enter/exit regardless of where a drag originated
- */
- public void eventDispatched(AWTEvent e) {
- boolean isForeignDrag = (e instanceof MouseEvent) &&
- (e.id == MouseEvent.MOUSE_DRAGGED) &&
- (e.getSource() != nativeContainer);
-
- if (!isForeignDrag) {
- // only interested in drags from other hw components
- return;
- }
-
- MouseEvent srcEvent = (MouseEvent)e;
- MouseEvent me;
-
- synchronized (nativeContainer.getTreeLock()) {
- Component srcComponent = srcEvent.getComponent();
-
- // component may have disappeared since drag event posted
- // (i.e. Swing hierarchical menus)
- if ( !srcComponent.isShowing() ||
- !nativeContainer.isShowing() ) {
- return;
- }
-
- //
- // create an internal 'dragged-over' event indicating
- // we are being dragged over from another hw component
- //
- me = new MouseEvent(nativeContainer,
- LWD_MOUSE_DRAGGED_OVER,
- srcEvent.getWhen(),
- srcEvent.getModifiers(),
- srcEvent.getX(),
- srcEvent.getY(),
- srcEvent.getClickCount(),
- srcEvent.isPopupTrigger());
- ((AWTEvent)srcEvent).copyPrivateDataInto(me);
- // translate coordinates to this native container
- Point ptSrcOrigin = srcComponent.getLocationOnScreen();
- Point ptDstOrigin = nativeContainer.getLocationOnScreen();
- me.translatePoint( ptSrcOrigin.x - ptDstOrigin.x, ptSrcOrigin.y - ptDstOrigin.y );
- }
- //System.out.println("Track event: " + me);
- // feed the 'dragged-over' event directly to the enter/exit
- // code (not a real event so don't pass it to dispatchEvent)
- Component targetOver = nativeContainer.getMouseEventTarget(me.getX(), me.getY(), true);
- trackMouseEnterExit(targetOver, me);
- }
-
- /**
- * Sends a mouse event to the current mouse event recipient using
- * the given event (sent to the windowed host) as a srcEvent. If
- * the mouse event target is still in the component tree, the
- * coordinates of the event are translated to those of the target.
- * If the target has been removed, we don't bother to send the
- * message.
- */
- void retargetMouseEvent(Component target, int id, MouseEvent e) {
- if (target == null) {
- return; // mouse is over another hw component
- }
-
- int x = e.getX(), y = e.getY();
- Component component;
-
- for(component = target;
- component != null && component != nativeContainer;
- component = component.getParent()) {
- x -= component.x;
- y -= component.y;
- }
- if (component != null) {
- MouseEvent retargeted = new MouseEvent(target,
- id,
- e.getWhen(),
- e.getModifiers(),
- x,
- y,
- e.getClickCount(),
- e.isPopupTrigger());
- ((AWTEvent)e).copyPrivateDataInto(retargeted);
-
- if (target == nativeContainer) {
- // avoid recursively calling LightweightDispatcher...
- ((Container)target).dispatchEventToSelf(retargeted);
- } else {
- target.dispatchEvent(retargeted);
- }
- }
- }
-
- /**
- * Set the cursor for a lightweight component
- * Enforce that null cursor means inheriting from parent
- */
- void updateCursor(Component comp) {
-
- // if user wants to change the cursor, we do it even mouse is dragging
- // so LightweightDispatcher's dragging state is not checked here
- if (comp != cursorOn) {
- return;
- }
-
- if (comp == null) {
- comp = nativeContainer;
- }
-
- Cursor cursor = comp.getIntrinsicCursor();
- while (cursor == null && comp != nativeContainer) {
- comp = comp.getParent();
-
- if (comp == null) {
- cursor = nativeContainer.getCursor();
- break;
- }
- cursor = comp.getIntrinsicCursor();
- }
-
- if (cursor != lightCursor) {
- lightCursor = cursor;
-
- // Only change the cursor on the peer, because we want client code to think
- // that the Container's cursor only changes in response to setCursor calls.
- ComponentPeer ncPeer = nativeContainer.getPeer();
- if (ncPeer != null) {
- ncPeer.setCursor(cursor);
- }
- }
- }
-
- /**
- * get the lightweight component mouse cursor is on
- * null means the nativeContainer
- */
- Component getCursorOn() {
- return cursorOn;
- }
-
- // --- member variables -------------------------------
-
- /**
- * The windowed container that might be hosting events for
- * lightweight components.
- */
- private Container nativeContainer;
-
- /**
- * The current lightweight component that has focus that is being
- * hosted by this container. If this is a null reference then
- * there is currently no focus on a lightweight component being
- * hosted by this container
- */
- private Component focus;
-
- /**
- * The current lightweight component being hosted by this windowed
- * component that has mouse events being forwarded to it. If this
- * is null, there are currently no mouse events being forwarded to
- * a lightweight component.
- */
- private transient Component mouseEventTarget;
-
- /**
- * lightweight component the cursor is on
- */
- private transient Component cursorOn;
-
- /**
- * The last component entered
- */
- private transient Component targetLastEntered;
-
- /**
- * Is the mouse over the native container
- */
- private transient boolean isMouseInNativeContainer = false;
-
- /**
- * Is the next click event orphaned because the component hid/moved
- */
- private transient boolean isClickOrphaned = false;
-
- /**
- * Indicates if the mouse pointer is currently being dragged...
- * this is needed because we may receive exit events while dragging
- * and need to keep the current mouse target in this case.
- */
- private boolean dragging;
-
- /**
- * The cursor that is currently displayed for the lightwieght
- * components. Remember this cursor, so we do not need to
- * change cursor on every mouse event.
- */
- private transient Cursor lightCursor;
-
- /**
- * This variable is not used, but kept for serialization compatibility
- */
- private Cursor nativeCursor;
-
- /**
- * The event mask for contained lightweight components. Lightweight
- * components need a windowed container to host window-related
- * events. This seperate mask indicates events that have been
- * requested by contained lightweight components without effecting
- * the mask of the windowed component itself.
- */
- private long eventMask;
-
- /**
- * The kind of events routed to lightweight components from windowed
- * hosts.
- */
- private static final long PROXY_EVENT_MASK =
- AWTEvent.FOCUS_EVENT_MASK |
- AWTEvent.KEY_EVENT_MASK |
- AWTEvent.MOUSE_EVENT_MASK |
- AWTEvent.MOUSE_MOTION_EVENT_MASK;
-
- private static final long MOUSE_MASK =
- AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK;
- }