/*
 * @(#)BasicToolBarUI.java	1.96 04/05/18
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.swing.plaf.basic;

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

import java.beans.*;

import java.util.Hashtable;
import java.util.HashMap;

import javax.swing.border.*;
import javax.swing.plaf.*;
import sun.swing.DefaultLookup;
import sun.swing.UIAction;


/**
 * A Basic L&F implementation of ToolBarUI.  This implementation 
 * is a "combined" view/controller.
 * <p>
 *
 * @version 1.96 05/18/04
 * @author Georges Saab
 * @author Jeff Shapiro
 */
public class BasicToolBarUI extends ToolBarUI implements SwingConstants
{
    protected JToolBar toolBar;
    private boolean floating;
    private int floatingX;
    private int floatingY;
    private JFrame floatingFrame;
    private RootPaneContainer floatingToolBar;
    protected DragWindow dragWindow;
    private Container dockingSource;
    private int dockingSensitivity = 0;
    protected int focusedCompIndex = -1;

    protected Color dockingColor = null;
    protected Color floatingColor = null;
    protected Color dockingBorderColor = null;
    protected Color floatingBorderColor = null;

    protected MouseInputListener dockingListener;
    protected PropertyChangeListener propertyListener;

    protected ContainerListener toolBarContListener;
    protected FocusListener toolBarFocusListener;
    private Handler handler;

    protected String constraintBeforeFloating = BorderLayout.NORTH;

    // Rollover button implementation.
    private static String IS_ROLLOVER = "JToolBar.isRollover";
    private static Border rolloverBorder;
    private static Border nonRolloverBorder;
    private static Border nonRolloverToggleBorder;
    private boolean rolloverBorders = false;

    private HashMap borderTable = new HashMap();
    private Hashtable rolloverTable = new Hashtable();


    /**
     * As of Java 2 platform v1.3 this previously undocumented field is no
     * longer used.
     * Key bindings are now defined by the LookAndFeel, please refer to
     * the key bindings specification for further details.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    @Deprecated
    protected KeyStroke upKey;
    /**
     * As of Java 2 platform v1.3 this previously undocumented field is no
     * longer used.
     * Key bindings are now defined by the LookAndFeel, please refer to
     * the key bindings specification for further details.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    @Deprecated
    protected KeyStroke downKey;
    /**
     * As of Java 2 platform v1.3 this previously undocumented field is no
     * longer used.
     * Key bindings are now defined by the LookAndFeel, please refer to
     * the key bindings specification for further details.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    @Deprecated
    protected KeyStroke leftKey;
    /**
     * As of Java 2 platform v1.3 this previously undocumented field is no
     * longer used.
     * Key bindings are now defined by the LookAndFeel, please refer to
     * the key bindings specification for further details.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    @Deprecated
    protected KeyStroke rightKey;


    private static String FOCUSED_COMP_INDEX = "JToolBar.focusedCompIndex";

    public static ComponentUI createUI( JComponent c )
    {
	return new BasicToolBarUI();
    }

    public void installUI( JComponent c )
    {
	toolBar = (JToolBar) c;

	// Set defaults
        installDefaults();
	installComponents();
        installListeners();
	installKeyboardActions();

        // Initialize instance vars
        dockingSensitivity = 0;
        floating = false;
        floatingX = floatingY = 0;
        floatingToolBar = null;

	setOrientation( toolBar.getOrientation() );
        LookAndFeel.installProperty(c, "opaque", Boolean.TRUE);

	if ( c.getClientProperty( FOCUSED_COMP_INDEX ) != null )
	{
	    focusedCompIndex = ( (Integer) ( c.getClientProperty( FOCUSED_COMP_INDEX ) ) ).intValue();
	}
    }
    
    public void uninstallUI( JComponent c )
    {

        // Clear defaults
        uninstallDefaults();
	uninstallComponents();
        uninstallListeners();
	uninstallKeyboardActions();

        // Clear instance vars
	if (isFloating() == true)
	    setFloating(false, null);

        floatingToolBar = null;
        dragWindow = null;
        dockingSource = null;

        c.putClientProperty( FOCUSED_COMP_INDEX, new Integer( focusedCompIndex ) );
    }

    protected void installDefaults( )
    {
 	LookAndFeel.installBorder(toolBar,"ToolBar.border");	
	LookAndFeel.installColorsAndFont(toolBar,
					      "ToolBar.background",
					      "ToolBar.foreground",
					      "ToolBar.font");
	// Toolbar specific defaults
	if ( dockingColor == null || dockingColor instanceof UIResource )
	    dockingColor = UIManager.getColor("ToolBar.dockingBackground");
	if ( floatingColor == null || floatingColor instanceof UIResource )
	    floatingColor = UIManager.getColor("ToolBar.floatingBackground");
	if ( dockingBorderColor == null || 
	     dockingBorderColor instanceof UIResource )
	    dockingBorderColor = UIManager.getColor("ToolBar.dockingForeground");
	if ( floatingBorderColor == null || 
	     floatingBorderColor instanceof UIResource )
	    floatingBorderColor = UIManager.getColor("ToolBar.floatingForeground");

	// ToolBar rollover button borders
	Object rolloverProp = toolBar.getClientProperty( IS_ROLLOVER );
        if (rolloverProp == null) {
            rolloverProp = UIManager.get("ToolBar.isRollover");
        }
	if ( rolloverProp != null ) {
	    rolloverBorders = ((Boolean)rolloverProp).booleanValue();
	}

	if (rolloverBorder == null) {
	    rolloverBorder = createRolloverBorder();
	}
	if (nonRolloverBorder == null) {
	    nonRolloverBorder = createNonRolloverBorder();
	}
	if (nonRolloverToggleBorder == null) {
	    nonRolloverToggleBorder = createNonRolloverToggleBorder();
	}


	setRolloverBorders( isRolloverBorders() );
    }

    protected void uninstallDefaults( )
    {
	LookAndFeel.uninstallBorder(toolBar);
        dockingColor = null;
        floatingColor = null;
        dockingBorderColor = null;
        floatingBorderColor = null;

	installNormalBorders(toolBar);

	rolloverBorder = null;
	nonRolloverBorder = null;
	nonRolloverToggleBorder = null;
    }

    protected void installComponents( )
    {
    }

    protected void uninstallComponents( )
    {
    }

    protected void installListeners( )
    {
        dockingListener = createDockingListener( );

        if ( dockingListener != null )
        {
	    toolBar.addMouseMotionListener( dockingListener );
	    toolBar.addMouseListener( dockingListener );
	}

	propertyListener = createPropertyListener();  // added in setFloating
	if (propertyListener != null) {
	    toolBar.addPropertyChangeListener(propertyListener);
	}

	toolBarContListener = createToolBarContListener();
        if ( toolBarContListener != null ) {
	    toolBar.addContainerListener( toolBarContListener );
	}

	toolBarFocusListener = createToolBarFocusListener();

        if ( toolBarFocusListener != null )
        {
	    // Put focus listener on all components in toolbar
	    Component[] components = toolBar.getComponents();

	    for ( int i = 0; i < components.length; ++i )
	    {
	        components[ i ].addFocusListener( toolBarFocusListener );
	    }
	}
    }

    protected void uninstallListeners( )
    {
        if ( dockingListener != null )
        {
	    toolBar.removeMouseMotionListener(dockingListener);
	    toolBar.removeMouseListener(dockingListener);

            dockingListener = null;
	}

	if ( propertyListener != null )
	{
	    toolBar.removePropertyChangeListener(propertyListener);
	    propertyListener = null;  // removed in setFloating
	}

	if ( toolBarContListener != null )
	{
	    toolBar.removeContainerListener( toolBarContListener );
	    toolBarContListener = null;
	}

        if ( toolBarFocusListener != null )
        {
	    // Remove focus listener from all components in toolbar
	    Component[] components = toolBar.getComponents();

	    for ( int i = 0; i < components.length; ++i )
	    {
	        components[ i ].removeFocusListener( toolBarFocusListener );
	    }

	    toolBarFocusListener = null;
	}
        handler = null;
    }

    protected void installKeyboardActions( )
    {
	InputMap km = getInputMap(JComponent.
				  WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);

	SwingUtilities.replaceUIInputMap(toolBar, JComponent.
					 WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,
					 km);

    LazyActionMap.installLazyActionMap(toolBar, BasicToolBarUI.class,
            "ToolBar.actionMap");
    }

    InputMap getInputMap(int condition) {
	if (condition == JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) {
	    return (InputMap)DefaultLookup.get(toolBar, this,
                    "ToolBar.ancestorInputMap");
	}
	return null;
    }

    static void loadActionMap(LazyActionMap map) {
        map.put(new Actions(Actions.NAVIGATE_RIGHT));
        map.put(new Actions(Actions.NAVIGATE_LEFT));
        map.put(new Actions(Actions.NAVIGATE_UP));
        map.put(new Actions(Actions.NAVIGATE_DOWN));
    }

    protected void uninstallKeyboardActions( )
    {
	SwingUtilities.replaceUIActionMap(toolBar, null);
	SwingUtilities.replaceUIInputMap(toolBar, JComponent.
					 WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,
					 null);
    }

    protected void navigateFocusedComp( int direction )
    {
        int nComp = toolBar.getComponentCount();
	int j;

        switch ( direction )
	{
	    case EAST:
	    case SOUTH:

		if ( focusedCompIndex < 0 || focusedCompIndex >= nComp ) break;

		j = focusedCompIndex + 1;

		while ( j != focusedCompIndex )
		{
		    if ( j >= nComp ) j = 0;
		    Component comp = toolBar.getComponentAtIndex( j++ );

		    if ( comp != null && comp.isFocusTraversable() && comp.isEnabled() )
		    {
		        comp.requestFocus();
			break;
		    }
		}

	        break;

	    case WEST:
	    case NORTH:

		if ( focusedCompIndex < 0 || focusedCompIndex >= nComp ) break;

		j = focusedCompIndex - 1;

		while ( j != focusedCompIndex )
		{
		    if ( j < 0 ) j = nComp - 1;
		    Component comp = toolBar.getComponentAtIndex( j-- );

		    if ( comp != null && comp.isFocusTraversable() && comp.isEnabled() )
		    {
		        comp.requestFocus();
			break;
		    }
		}

	        break;

	    default:
	        break;
	}
    }

    /**
     * Creates a rollover border for toolbar components. The 
     * rollover border will be installed if rollover borders are 
     * enabled. 
     * <p>
     * Override this method to provide an alternate rollover border.
     *
     * @since 1.4
     */
    protected Border createRolloverBorder() {
        Object border = UIManager.get("ToolBar.rolloverBorder");
        if (border != null) {
            return (Border)border;
        }
	UIDefaults table = UIManager.getLookAndFeelDefaults();
	return new CompoundBorder(new BasicBorders.RolloverButtonBorder(
					   table.getColor("controlShadow"),
                                           table.getColor("controlDkShadow"),
                                           table.getColor("controlHighlight"),
                                           table.getColor("controlLtHighlight")),
				  new BasicBorders.RolloverMarginBorder());
    }

    /**
     * Creates the non rollover border for toolbar components. This
     * border will be installed as the border for components added
     * to the toolbar if rollover borders are not enabled.
     * <p>
     * Override this method to provide an alternate rollover border.
     *
     * @since 1.4
     */
    protected Border createNonRolloverBorder() {
        Object border = UIManager.get("ToolBar.nonrolloverBorder");
        if (border != null) {
            return (Border)border;
        }
	UIDefaults table = UIManager.getLookAndFeelDefaults();
	return new CompoundBorder(new BasicBorders.ButtonBorder(
					   table.getColor("Button.shadow"),
                                           table.getColor("Button.darkShadow"),
                                           table.getColor("Button.light"),
                                           table.getColor("Button.highlight")),
				  new BasicBorders.RolloverMarginBorder());
    }

    /**
     * Creates a non rollover border for Toggle buttons in the toolbar.
     */
    private Border createNonRolloverToggleBorder() {
	UIDefaults table = UIManager.getLookAndFeelDefaults();
	return new CompoundBorder(new BasicBorders.RadioButtonBorder(
 					   table.getColor("ToggleButton.shadow"),
                                           table.getColor("ToggleButton.darkShadow"),
                                           table.getColor("ToggleButton.light"),
                                           table.getColor("ToggleButton.highlight")),
				  new BasicBorders.RolloverMarginBorder());
    }

    /**
     * No longer used, use BasicToolBarUI.createFloatingWindow(JToolBar)
     * @see #createFloatingWindow
     */
    protected JFrame createFloatingFrame(JToolBar toolbar) {
	Window window = SwingUtilities.getWindowAncestor(toolbar);
	JFrame frame = new JFrame(toolbar.getName(),
				  (window != null) ? window.getGraphicsConfiguration() : null) {
	    // Override createRootPane() to automatically resize
	    // the frame when contents change
	    protected JRootPane createRootPane() {
		JRootPane rootPane = new JRootPane() {
		    private boolean packing = false;

		    public void validate() {
			super.validate();
			if (!packing) {
			    packing = true;
			    pack();
			    packing = false;
			}
		    }
		};
		rootPane.setOpaque(true);
		return rootPane;
	    }
	};
        frame.getRootPane().setName("ToolBar.FloatingFrame");
	frame.setResizable(false);
	WindowListener wl = createFrameListener();
	frame.addWindowListener(wl);
        return frame;
    }

    /**
     * Creates a window which contains the toolbar after it has been
     * dragged out from its container
     * @return a <code>RootPaneContainer</code> object, containing the toolbar.
     */
    protected RootPaneContainer createFloatingWindow(JToolBar toolbar) {
	class ToolBarDialog extends JDialog {
	    public ToolBarDialog(Frame owner, String title, boolean modal) {
		super(owner, title, modal);
	    }

	    public ToolBarDialog(Dialog owner, String title, boolean modal) {
		super(owner, title, modal);
	    }

	    // Override createRootPane() to automatically resize
	    // the frame when contents change
	    protected JRootPane createRootPane() {
		JRootPane rootPane = new JRootPane() {
		    private boolean packing = false;

		    public void validate() {
			super.validate();
			if (!packing) {
			    packing = true;
			    pack();
			    packing = false;
			}
		    }
		};
		rootPane.setOpaque(true);
		return rootPane;
	    }
	}

	JDialog dialog;
	Window window = SwingUtilities.getWindowAncestor(toolbar);
	if (window instanceof Frame) {
	    dialog = new ToolBarDialog((Frame)window, toolbar.getName(), false);
	} else if (window instanceof Dialog) {
	    dialog = new ToolBarDialog((Dialog)window, toolbar.getName(), false);
	} else {
	    dialog = new ToolBarDialog((Frame)null, toolbar.getName(), false);
	}

        dialog.getRootPane().setName("ToolBar.FloatingWindow");
	dialog.setTitle(toolbar.getName());
	dialog.setResizable(false);
	WindowListener wl = createFrameListener();
	dialog.addWindowListener(wl);
        return dialog;
    }

    protected DragWindow createDragWindow(JToolBar toolbar) {
	Window frame = null;
	if(toolBar != null) {
	    Container p;
	    for(p = toolBar.getParent() ; p != null && !(p instanceof Window) ;
		p = p.getParent());
	    if(p != null && p instanceof Window)
		frame = (Window) p;
	}
	if(floatingToolBar == null) {
	    floatingToolBar = createFloatingWindow(toolBar);
	}
	if (floatingToolBar instanceof Window) frame = (Window) floatingToolBar;
	DragWindow dragWindow = new DragWindow(frame);
	return dragWindow;
    }

    /**
     * Returns a flag to determine whether rollover button borders 
     * are enabled.
     *
     * @return true if rollover borders are enabled; false otherwise
     * @see #setRolloverBorders
     * @since 1.4
     */
    public boolean isRolloverBorders() {
        return rolloverBorders;
    }
    
    /**
     * Sets the flag for enabling rollover borders on the toolbar and it will
     * also install the apropriate border depending on the state of the flag.
     *    
     * @param rollover if true, rollover borders are installed. 
     *	      Otherwise non-rollover borders are installed
     * @see #isRolloverBorders
     * @since 1.4
     */
    public void setRolloverBorders( boolean rollover ) {
        rolloverBorders = rollover;
	    
	if ( rolloverBorders )	{
	    installRolloverBorders( toolBar );
	} else	{
	    installNonRolloverBorders( toolBar );
	}
    }

    /**
     * Installs rollover borders on all the child components of the JComponent.
     * <p>
     * This is a convenience method to call <code>setBorderToRollover</code> 
     * for each child component.
     *    
     * @param c container which holds the child components (usally a JToolBar)
     * @see #setBorderToRollover
     * @since 1.4
     */
    protected void installRolloverBorders ( JComponent c )  {
	// Put rollover borders on buttons
	Component[] components = c.getComponents();

	for ( int i = 0; i < components.length; ++i ) {
	    if ( components[ i ] instanceof JComponent ) {
		( (JComponent)components[ i ] ).updateUI();
		setBorderToRollover( components[ i ] );
	    }
	}
    }

    /**
     * Installs non-rollover borders on all the child components of the JComponent.
     * A non-rollover border is the border that is installed on the child component
     * while it is in the toolbar.
     * <p>
     * This is a convenience method to call <code>setBorderToNonRollover</code> 
     * for each child component.
     *    
     * @param c container which holds the child components (usally a JToolBar)
     * @see #setBorderToNonRollover
     * @since 1.4
     */
    protected void installNonRolloverBorders ( JComponent c )  {
	// Put non-rollover borders on buttons. These borders reduce the margin.
	Component[] components = c.getComponents();

	for ( int i = 0; i < components.length; ++i ) {
	    if ( components[ i ] instanceof JComponent ) {
		( (JComponent)components[ i ] ).updateUI();
		setBorderToNonRollover( components[ i ] );
	    }
	}
    }

    /**
     * Installs normal borders on all the child components of the JComponent.
     * A normal border is the original border that was installed on the child
     * component before it was added to the toolbar.
     * <p>
     * This is a convenience method to call <code>setBorderNormal</code> 
     * for each child component.
     *    
     * @param c container which holds the child components (usally a JToolBar)
     * @see #setBorderToNonRollover
     * @since 1.4
     */
    protected void installNormalBorders ( JComponent c )  {
	// Put back the normal borders on buttons
	Component[] components = c.getComponents();

	for ( int i = 0; i < components.length; ++i ) {
	    setBorderToNormal( components[ i ] );
	}
    }

    /**
     * Sets the border of the component to have a rollover border which
     * was created by <code>createRolloverBorder</code>. 
     *
     * @param c component which will have a rollover border installed 
     * @see #createRolloverBorder
     * @since 1.4
     */
    protected void setBorderToRollover(Component c) {
        if (c instanceof AbstractButton) {
	    AbstractButton b = (AbstractButton)c;
	    
	    Border border = (Border)borderTable.get(b);
	    if (border == null || border instanceof UIResource) {
		borderTable.put(b, b.getBorder());
	    }

	    // Only set the border if its the default border
	    if (b.getBorder() instanceof UIResource) {
		b.setBorder(rolloverBorder);
	    }

	    rolloverTable.put(b, b.isRolloverEnabled()?
			      Boolean.TRUE: Boolean.FALSE);
	    b.setRolloverEnabled(true);
	}
    }

    /**
     * Sets the border of the component to have a non-rollover border which
     * was created by <code>createNonRolloverBorder</code>. 
     *
     * @param c component which will have a non-rollover border installed 
     * @see #createNonRolloverBorder
     * @since 1.4
     */
    protected void setBorderToNonRollover(Component c) {
        if (c instanceof AbstractButton) {
	    AbstractButton b = (AbstractButton)c;
	    
	    Border border = (Border)borderTable.get(b);
	    if (border == null || border instanceof UIResource) {
		borderTable.put(b, b.getBorder());
	    }

	    // Only set the border if its the default border
	    if (b.getBorder() instanceof UIResource) {
		if (b instanceof JToggleButton) {
		    ((JToggleButton)b).setBorder(nonRolloverToggleBorder);
		} else {
		    b.setBorder(nonRolloverBorder);
		}
	    }
	    rolloverTable.put(b, b.isRolloverEnabled()?
			      Boolean.TRUE: Boolean.FALSE);
	    b.setRolloverEnabled(false);
	}
    }



    /**
     * Sets the border of the component to have a normal border.
     * A normal border is the original border that was installed on the child
     * component before it was added to the toolbar.
     *
     * @param c component which will have a normal border re-installed 
     * @see #createNonRolloverBorder
     * @since 1.4
     */
    protected void setBorderToNormal(Component c) {
        if (c instanceof AbstractButton) {
	    AbstractButton b = (AbstractButton)c;

	    Border border = (Border)borderTable.remove(b);
	    b.setBorder(border);

	    Boolean value = (Boolean)rolloverTable.remove(b);
	    if (value != null) {
		b.setRolloverEnabled(value.booleanValue());
	    }
	}
    }

    public void setFloatingLocation(int x, int y) {
	floatingX = x;
	floatingY = y;
    }
    
    public boolean isFloating() {
	return floating;
    }

    public void setFloating(boolean b, Point p) {
 	if (toolBar.isFloatable() == true) {
	    if (dragWindow != null)
		dragWindow.setVisible(false);
	    this.floating = b;
	    if (b == true)
	    {
		if (dockingSource == null)
		{
		    dockingSource = toolBar.getParent();
		    dockingSource.remove(toolBar);
		}
		constraintBeforeFloating = calculateConstraint();
		if ( propertyListener != null )
                    UIManager.addPropertyChangeListener( propertyListener );
		if (floatingToolBar == null)
		    floatingToolBar = createFloatingWindow(toolBar);
		floatingToolBar.getContentPane().add(toolBar,BorderLayout.CENTER);
		if (floatingToolBar instanceof Window) ((Window)floatingToolBar).pack();
		if (floatingToolBar instanceof Window) ((Window)floatingToolBar).setLocation(floatingX, floatingY);
		if (floatingToolBar instanceof Window) ((Window)floatingToolBar).show();
	    } else {
		if (floatingToolBar == null)
		    floatingToolBar = createFloatingWindow(toolBar);
		if (floatingToolBar instanceof Window) ((Window)floatingToolBar).setVisible(false);
		floatingToolBar.getContentPane().remove(toolBar);
		String constraint = getDockingConstraint(dockingSource,
							 p);
		if (constraint == null) {
		    constraint = BorderLayout.NORTH;
		}
		int orientation = mapConstraintToOrientation(constraint);
		setOrientation(orientation);
		if (dockingSource== null)
		    dockingSource = toolBar.getParent();
		if ( propertyListener != null )
		    UIManager.removePropertyChangeListener( propertyListener );
		dockingSource.add(constraint, toolBar);
	    }
 	    dockingSource.invalidate();
 	    Container dockingSourceParent = dockingSource.getParent();
	    if (dockingSourceParent != null) 
		dockingSourceParent.validate();
	    dockingSource.repaint();
	}
    }

    private int mapConstraintToOrientation(String constraint)
    {
	int orientation = toolBar.getOrientation();

	if ( constraint != null )
	{
	    if ( constraint.equals(BorderLayout.EAST) || constraint.equals(BorderLayout.WEST) )
	        orientation = JToolBar.VERTICAL;
	    else if ( constraint.equals(BorderLayout.NORTH) || constraint.equals(BorderLayout.SOUTH) )
	        orientation = JToolBar.HORIZONTAL;
	}

	return orientation;
    }
    
    public void setOrientation(int orientation)
    {	
        toolBar.setOrientation( orientation );

	if (dragWindow !=null)
	    dragWindow.setOrientation(orientation);
    }
    
    /**
     * Gets the color displayed when over a docking area
     */
    public Color getDockingColor() {
	return dockingColor;
    }
    
    /**
     * Sets the color displayed when over a docking area
     */
   public void setDockingColor(Color c) {
	this.dockingColor = c;
    }

    /**
     * Gets the color displayed when over a floating area
     */
    public Color getFloatingColor() {
	return floatingColor;
    }

    /**
     * Sets the color displayed when over a floating area
     */
    public void setFloatingColor(Color c) {
	this.floatingColor = c;
    }
    
    private boolean isBlocked(Component comp, Object constraint) {
	if (comp instanceof Container) {
	    Container cont = (Container)comp;
	    LayoutManager lm = cont.getLayout();
	    if (lm instanceof BorderLayout) {
		BorderLayout blm = (BorderLayout)lm;
		Component c = blm.getLayoutComponent(cont, constraint);
		return (c != null && c != toolBar);
	    }
	}
	return false;
    }

    public boolean canDock(Component c, Point p) {
	return (p != null && getDockingConstraint(c, p) != null);
    }

    private String calculateConstraint() {
	String constraint = null;
	LayoutManager lm = dockingSource.getLayout();
	if (lm instanceof BorderLayout) {
	    constraint = (String)((BorderLayout)lm).getConstraints(toolBar);
	}
	return (constraint != null) ? constraint : constraintBeforeFloating;
    }



    private String getDockingConstraint(Component c, Point p) {
	if (p == null) return constraintBeforeFloating;
	if (c.contains(p)) {
	    dockingSensitivity = (toolBar.getOrientation() == JToolBar.HORIZONTAL)
						? toolBar.getSize().height
						: toolBar.getSize().width;
	    // North  (Base distance on height for now!)
	    if (p.y < dockingSensitivity && !isBlocked(c, BorderLayout.NORTH)) {
		return BorderLayout.NORTH;
	    }
	    // East  (Base distance on height for now!)
	    if (p.x >= c.getWidth() - dockingSensitivity && !isBlocked(c, BorderLayout.EAST)) {
		return BorderLayout.EAST;
	    }
	    // West  (Base distance on height for now!)
	    if (p.x < dockingSensitivity && !isBlocked(c, BorderLayout.WEST)) {
		return BorderLayout.WEST;
	    }
	    if (p.y >= c.getHeight() - dockingSensitivity && !isBlocked(c, BorderLayout.SOUTH)) {
		return BorderLayout.SOUTH;
	    }
	}
	return null;
    }

    protected void dragTo(Point position, Point origin)
    {
	if (toolBar.isFloatable() == true)
	{
	  try
	  {
	    if (dragWindow == null)
		dragWindow = createDragWindow(toolBar);
	    Point offset = dragWindow.getOffset();
	    if (offset == null) {
		Dimension size = toolBar.getPreferredSize();
		offset = new Point(size.width2, size.height2);
		dragWindow.setOffset(offset);
	    }
	    Point global = new Point(origin.x+ position.x,
				     origin.y+position.y);
	    Point dragPoint = new Point(global.x- offset.x, 
					global.y- offset.y);
	    if (dockingSource == null)
		dockingSource = toolBar.getParent();
		constraintBeforeFloating = calculateConstraint();	    
	    Point dockingPosition = dockingSource.getLocationOnScreen();
	    Point comparisonPoint = new Point(global.x-dockingPosition.x,
					      global.y-dockingPosition.y);
	    if (canDock(dockingSource, comparisonPoint)) {
		dragWindow.setBackground(getDockingColor());	
		String constraint = getDockingConstraint(dockingSource,
							 comparisonPoint);
		int orientation = mapConstraintToOrientation(constraint);
		dragWindow.setOrientation(orientation);
		dragWindow.setBorderColor(dockingBorderColor);
	    } else {
		dragWindow.setBackground(getFloatingColor());
		dragWindow.setBorderColor(floatingBorderColor);
	    }
	    
	    dragWindow.setLocation(dragPoint.x, dragPoint.y);
	    if (dragWindow.isVisible() == false) {
		Dimension size = toolBar.getPreferredSize();
		dragWindow.setSize(size.width, size.height);
		dragWindow.show();
	    }
	  }
	  catch ( IllegalComponentStateException e )
	  {
	  }
	}
    }

    protected void floatAt(Point position, Point origin)
    {
	if(toolBar.isFloatable() == true)
	{
	  try
	  {
	    Point offset = dragWindow.getOffset();
	    if (offset == null) {
		offset = position;
		dragWindow.setOffset(offset);
	    }
	    Point global = new Point(origin.x+ position.x,
				     origin.y+position.y);
	    setFloatingLocation(global.x-offset.x, 
				global.y-offset.y);
	    if (dockingSource != null) { 
		Point dockingPosition = dockingSource.getLocationOnScreen();
		Point comparisonPoint = new Point(global.x-dockingPosition.x,
						  global.y-dockingPosition.y);
		if (canDock(dockingSource, comparisonPoint)) {
		    setFloating(false, comparisonPoint);
		} else {
		    setFloating(true, null);
		}
	    } else {
		setFloating(true, null);
	    }
	    dragWindow.setOffset(null);
	  }
	  catch ( IllegalComponentStateException e )
	  {
	  }
	}
    }

    private Handler getHandler() {
        if (handler == null) {
            handler = new Handler();
        }
        return handler;
    }

    protected ContainerListener createToolBarContListener( )
    {
        return getHandler();
    }

    protected FocusListener createToolBarFocusListener( )
    {
        return getHandler();
    }

    protected PropertyChangeListener createPropertyListener()
    {
        return getHandler();
    }

    protected MouseInputListener createDockingListener( ) {
        getHandler().tb = toolBar;
        return getHandler();
    }
    
    protected WindowListener createFrameListener() {
	return new FrameListener();
    }

    /**
     * Paints the contents of the window used for dragging.
     *
     * @param g Graphics to paint to.
     * @throws NullPointerException is <code>g</code> is null
     * @since 1.5
     */
    protected void paintDragWindow(Graphics g) {
        g.setColor(dragWindow.getBackground());	    
        int w = dragWindow.getWidth();
        int h = dragWindow.getHeight();
        g.fillRect(0, 0, w, h);
        g.setColor(dragWindow.getBorderColor());
        g.drawRect(0, 0, w - 1, h - 1);	    
    }


    private static class Actions extends UIAction {
        private static final String NAVIGATE_RIGHT = "navigateRight";
        private static final String NAVIGATE_LEFT = "navigateLeft";
        private static final String NAVIGATE_UP = "navigateUp";
        private static final String NAVIGATE_DOWN = "navigateDown";

        public Actions(String name) {
            super(name);
        }

        public void actionPerformed(ActionEvent evt) {
            String key = getName();
            JToolBar toolBar = (JToolBar)evt.getSource();
            BasicToolBarUI ui = (BasicToolBarUI)BasicLookAndFeel.getUIOfType(
                     toolBar.getUI(), BasicToolBarUI.class);

            if (NAVIGATE_RIGHT == key) {
                ui.navigateFocusedComp(EAST);
            } else if (NAVIGATE_LEFT == key) {
                ui.navigateFocusedComp(WEST);
            } else if (NAVIGATE_UP == key) {
                ui.navigateFocusedComp(NORTH);
            } else if (NAVIGATE_DOWN == key) {
                ui.navigateFocusedComp(SOUTH);
            }
        }
    }


    private class Handler implements ContainerListener,
            FocusListener, MouseInputListener, PropertyChangeListener {

        //
        // ContainerListener
        //
        public void componentAdded(ContainerEvent evt) {
            Component c = evt.getChild();

            if (toolBarFocusListener != null) {
                c.addFocusListener(toolBarFocusListener);
            }

            if (isRolloverBorders()) {
                setBorderToRollover(c);
            } else {
                setBorderToNonRollover(c);
            }
        }

        public void componentRemoved(ContainerEvent evt) {
            Component c = evt.getChild();

            if (toolBarFocusListener != null) {
                c.removeFocusListener(toolBarFocusListener);
            }

            // Revert the button border
            setBorderToNormal(c);
        }


        //
        // FocusListener
        //
        public void focusGained(FocusEvent evt) {
            Component c = evt.getComponent();
            focusedCompIndex = toolBar.getComponentIndex(c);
        }

        public void focusLost(FocusEvent evt) { }


        //
        // MouseInputListener (DockingListener)
        //
        JToolBar tb;
        boolean isDragging = false;
        Point origin = null;

        public void mousePressed(MouseEvent evt) { 
            if (!tb.isEnabled()) {
                return;
            }
            isDragging = false;
        }

        public void mouseReleased(MouseEvent evt) {
            if (!tb.isEnabled()) {
                return;
            }
            if (isDragging == true) {
                Point position = evt.getPoint();
                if (origin == null)
                    origin = evt.getComponent().getLocationOnScreen();
                floatAt(position, origin);
            }
            origin = null;
            isDragging = false;
        }

        public void mouseDragged(MouseEvent evt) {
            if (!tb.isEnabled()) {
                return;
            }
            isDragging = true;
            Point position = evt.getPoint();
            if (origin == null) {
                origin = evt.getComponent().getLocationOnScreen();
            }
            dragTo(position, origin);
        }

        public void mouseClicked(MouseEvent evt) {}
        public void mouseEntered(MouseEvent evt) {}
        public void mouseExited(MouseEvent evt) {}
        public void mouseMoved(MouseEvent evt) {}


        //
        // PropertyChangeListener
        //
        public void propertyChange(PropertyChangeEvent evt) {
            String propertyName = evt.getPropertyName();
            if (propertyName == "lookAndFeel") {
                toolBar.updateUI();
            } else if (propertyName == "orientation") {
                // Search for JSeparator components and change it's orientation
                // to match the toolbar and flip it's orientation.
                Component[] components = toolBar.getComponents();
                int orientation = ((Integer)evt.getNewValue()).intValue();
                JToolBar.Separator separator;

                for (int i = 0; i < components.length; ++i) {
                    if (components[i] instanceof JToolBar.Separator) {
                        separator = (JToolBar.Separator)components[i];
                        if ((orientation == JToolBar.HORIZONTAL)) {
                            separator.setOrientation(JSeparator.VERTICAL);
                        } else {
                            separator.setOrientation(JSeparator.HORIZONTAL);
                        }
                        Dimension size = separator.getSeparatorSize();
                        if (size != null && size.width != size.height) {
                            // Flip the orientation.
                            Dimension newSize =
                                new Dimension(size.height, size.width);
                            separator.setSeparatorSize(newSize);
                        }
                    }
                }
            } else if (propertyName == IS_ROLLOVER) {
		installNormalBorders(toolBar);
                setRolloverBorders(((Boolean)evt.getNewValue()).booleanValue());
            }
        }
    }

    protected class FrameListener extends WindowAdapter {
	public void windowClosing(WindowEvent w) {	    
	    if (toolBar.isFloatable() == true) {
		if (dragWindow != null)
		    dragWindow.setVisible(false);
		floating = false;
		if (floatingToolBar == null)
		    floatingToolBar = createFloatingWindow(toolBar);
		if (floatingToolBar instanceof Window) ((Window)floatingToolBar).setVisible(false);
		floatingToolBar.getContentPane().remove(toolBar);
		String constraint = constraintBeforeFloating;
                if (toolBar.getOrientation() == JToolBar.HORIZONTAL) {
                    if (constraint == "West" || constraint == "East") {
                        constraint = "North";
                    }
               	} else {
                    if (constraint == "North" || constraint == "South") {
                        constraint = "West";
                    }
                }
		if (dockingSource == null)
		    dockingSource = toolBar.getParent();
		if (propertyListener != null)
		    UIManager.removePropertyChangeListener(propertyListener);
		dockingSource.add(toolBar, constraint);
		dockingSource.invalidate();
		Container dockingSourceParent = dockingSource.getParent();
		if (dockingSourceParent != null)
			dockingSourceParent.validate();
		dockingSource.repaint();
            }
	}

    } 

    protected class ToolBarContListener implements ContainerListener {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this      
        // class calls into the Handler.
        public void componentAdded( ContainerEvent e )	{
            getHandler().componentAdded(e);
        }

        public void componentRemoved( ContainerEvent e ) {
            getHandler().componentRemoved(e);
        }

    }

    protected class ToolBarFocusListener implements FocusListener {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this      
        // class calls into the Handler.
        public void focusGained( FocusEvent e ) {
            getHandler().focusGained(e);
	    }

        public void focusLost( FocusEvent e ) {
            getHandler().focusLost(e);
	    }
    }

    protected class PropertyListener implements PropertyChangeListener {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this      
        // class calls into the Handler.
        public void propertyChange( PropertyChangeEvent e ) {
            getHandler().propertyChange(e);
	    }
    }

    /**
     * This class should be treated as a "protected" inner class.
     * Instantiate it only within subclasses of BasicToolBarUI.
     */
    public class DockingListener implements MouseInputListener {
        // NOTE: This class exists only for backward compatability. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this      
        // class calls into the Handler.
	protected JToolBar toolBar;
	protected boolean isDragging = false;
	protected Point origin = null;

	public DockingListener(JToolBar t) {
	    this.toolBar = t;
            getHandler().tb = t;
	} 

	public void mouseClicked(MouseEvent e) {
        getHandler().mouseClicked(e);
    }

	public void mousePressed(MouseEvent e) { 
        getHandler().tb = toolBar;
        getHandler().mousePressed(e);
        isDragging = getHandler().isDragging;
	}

	public void mouseReleased(MouseEvent e) {
        getHandler().tb = toolBar;
        getHandler().isDragging = isDragging;
        getHandler().origin = origin;
        getHandler().mouseReleased(e);
        isDragging = getHandler().isDragging;
        origin = getHandler().origin;
	}

	public void mouseEntered(MouseEvent e) {
        getHandler().mouseEntered(e);
    }

	public void mouseExited(MouseEvent e) {
        getHandler().mouseExited(e);
    }

	public void mouseDragged(MouseEvent e) {
        getHandler().tb = toolBar;
        getHandler().origin = origin;
        getHandler().mouseDragged(e);
        isDragging = getHandler().isDragging;
        origin = getHandler().origin;
	}

	public void mouseMoved(MouseEvent e) {
        getHandler().mouseMoved(e);
	}
    }

    protected class DragWindow extends Window
    {
	Color borderColor = Color.gray;
	int orientation = toolBar.getOrientation();
	Point offset; // offset of the mouse cursor inside the DragWindow

	DragWindow(Window w) {
	    super(w);
	}

	public void setOrientation(int o) {
	    if(isShowing()) {
		if (o == this.orientation)
		    return;	    
		this.orientation = o;
		Dimension size = getSize();
		setSize(new Dimension(size.height, size.width));
		if (offset!=null) {
                    if( BasicGraphicsUtils.isLeftToRight(toolBar) ) {
                        setOffset(new Point(offset.y, offset.x));
                    } else if( o == JToolBar.HORIZONTAL ) {
                        setOffset(new Point( size.height-offset.y, offset.x));
                    } else {
                        setOffset(new Point(offset.y, size.width-offset.x));
                    }
                }
		repaint();
	    }
	}

	public Point getOffset() {
	    return offset;
	}

	public void setOffset(Point p) {
	    this.offset = p;
	}
	
	public void setBorderColor(Color c) {
	    if (this.borderColor == c)
		return;
	    this.borderColor = c;
	    repaint();
	}

	public Color getBorderColor() {
	    return this.borderColor;
	}

	public void paint(Graphics g) {
            paintDragWindow(g);
            // Paint the children
            super.paint(g);
	}
	public Insets getInsets() {
	    return new Insets(1,1,1,1);
	}
    }
}