basicsplitpaneui.java

java jdk 1.4的源码

    }


    /**
     * Uninstalls the UI defaults.
     */
    protected void uninstallDefaults() {
        if(splitPane.getLayout() == layoutManager) {
            splitPane.setLayout(null);
        }

        if(nonContinuousLayoutDivider != null) {
            splitPane.remove(nonContinuousLayoutDivider);
        }

        LookAndFeel.uninstallBorder(splitPane);

	Border    b = divider.getBorder();

	if (b instanceof UIResource) {
	    divider.setBorder(null);
	}

        splitPane.remove(divider);
        divider.setBasicSplitPaneUI(null);
        layoutManager = null;
        divider = null;
        nonContinuousLayoutDivider = null;

        setNonContinuousLayoutDivider(null);

	// sets the focus forward and backward traversal keys to null
	// to restore the defaults
	splitPane.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, null);
	splitPane.setFocusTraversalKeys(KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, null);
    }


    /**
     * Uninstalls the event listeners for the UI.
     */
    protected void uninstallListeners() {
        if (propertyChangeListener != null) {
            splitPane.removePropertyChangeListener(propertyChangeListener);
            propertyChangeListener = null;
        }
        if (focusListener != null) {
            splitPane.removeFocusListener(focusListener);
            focusListener = null;
        }

        keyboardUpLeftListener = null;
        keyboardDownRightListener = null;
        keyboardHomeListener = null;
        keyboardEndListener = null;
        keyboardResizeToggleListener = null;
    }


    /**
     * Uninstalls the keyboard actions for the UI.
     */
    protected void uninstallKeyboardActions() {
	SwingUtilities.replaceUIActionMap(splitPane, null);
	SwingUtilities.replaceUIInputMap(splitPane, JComponent.
				      WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,
				      null);
    }


    /**
     * Creates a PropertyChangeListener for the JSplitPane UI.
     */
    protected PropertyChangeListener createPropertyChangeListener() {
        return new PropertyHandler();
    }


    /**
     * Creates a FocusListener for the JSplitPane UI.
     */
    protected FocusListener createFocusListener() {
        return new FocusHandler();
    }


    /**
     * As of Java 2 platform v1.3 this method is no
     * longer used. Subclassers previously using this method should
     * instead create an Action wrapping the ActionListener, and register
     * that Action by overriding <code>installKeyboardActions</code> and
     * placing the Action in the SplitPane's ActionMap. Please refer to
     * the key bindings specification for further details.
     * <p>
     * Creates a ActionListener for the JSplitPane UI that listens for
     * specific key presses.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    protected ActionListener createKeyboardUpLeftListener() {
        return new KeyboardUpLeftHandler();
    }


    /**
     * As of Java 2 platform v1.3 this method is no
     * longer used. Subclassers previously using this method should
     * instead create an Action wrapping the ActionListener, and register
     * that Action by overriding <code>installKeyboardActions</code> and
     * placing the Action in the SplitPane's ActionMap. Please refer to
     * the key bindings specification for further details.
     * <p>
     * Creates a ActionListener for the JSplitPane UI that listens for
     * specific key presses.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    protected ActionListener createKeyboardDownRightListener() {
        return new KeyboardDownRightHandler();
    }


    /**
     * As of Java 2 platform v1.3 this method is no
     * longer used. Subclassers previously using this method should
     * instead create an Action wrapping the ActionListener, and register
     * that Action by overriding <code>installKeyboardActions</code> and
     * placing the Action in the SplitPane's ActionMap. Please refer to
     * the key bindings specification for further details.
     * <p>
     * Creates a ActionListener for the JSplitPane UI that listens for
     * specific key presses.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    protected ActionListener createKeyboardHomeListener() {
        return new KeyboardHomeHandler();
    }


    /**
     * As of Java 2 platform v1.3 this method is no
     * longer used. Subclassers previously using this method should
     * instead create an Action wrapping the ActionListener, and register
     * that Action by overriding <code>installKeyboardActions</code> and
     * placing the Action in the SplitPane's ActionMap. Please refer to
     * the key bindings specification for further details.
     * <p>
     * Creates a ActionListener for the JSplitPane UI that listens for
     * specific key presses.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    protected ActionListener createKeyboardEndListener() {
        return new KeyboardEndHandler();
    }


    /**
     * As of Java 2 platform v1.3 this method is no
     * longer used. Subclassers previously using this method should
     * instead create an Action wrapping the ActionListener, and register
     * that Action by overriding <code>installKeyboardActions</code> and
     * placing the Action in the SplitPane's ActionMap. Please refer to
     * the key bindings specification for further details.
     * <p>
     * Creates a ActionListener for the JSplitPane UI that listens for
     * specific key presses.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    protected ActionListener createKeyboardResizeToggleListener() {
        return new KeyboardResizeToggleHandler();
    }


    /**
     * Returns the orientation for the JSplitPane.
     */
    public int getOrientation() {
        return orientation;
    }


    /**
     * Set the orientation for the JSplitPane.
     */
    public void setOrientation(int orientation) {
        this.orientation = orientation;
    }


    /**
     * Determines wether the JSplitPane is set to use a continuous layout.
     */
    public boolean isContinuousLayout() {
        return continuousLayout;
    }


    /**
     * Turn continuous layout on/off.
     */
    public void setContinuousLayout(boolean b) {
        continuousLayout = b;
    }


    /**
     * Returns the last drag location of the JSplitPane.
     */
    public int getLastDragLocation() {
        return lastDragLocation;
    }


    /**
     * Set the last drag location of the JSplitPane.
     */
    public void setLastDragLocation(int l) {
        lastDragLocation = l;
    }

    /**
     * @return increment via keyboard methods.
     */
    int getKeyboardMoveIncrement() {
	return KEYBOARD_DIVIDER_MOVE_OFFSET;
    }

    /**
     * Implementation of the PropertyChangeListener
     * that the JSplitPane UI uses.
     * <p>
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicSplitPaneUI.
     */
    public class PropertyHandler implements PropertyChangeListener
    {
        /**
         * Messaged from the <code>JSplitPane</code> the receiver is
         * contained in.  May potentially reset the layout manager and cause a
         * <code>validate</code> to be sent.
         */
        public void propertyChange(PropertyChangeEvent e) {
            if(e.getSource() == splitPane) {
                String changeName = e.getPropertyName();

                if(changeName.equals(JSplitPane.ORIENTATION_PROPERTY)) {
                    orientation = splitPane.getOrientation();
                    resetLayoutManager();
                } else if(changeName.equals(
                                    JSplitPane.CONTINUOUS_LAYOUT_PROPERTY)) {
                    setContinuousLayout(splitPane.isContinuousLayout());
                    if(!isContinuousLayout()) {
                        if(nonContinuousLayoutDivider == null) {
                            setNonContinuousLayoutDivider(
                                createDefaultNonContinuousLayoutDivider(),
                                true);
                        } else if(nonContinuousLayoutDivider.getParent() ==
                                  null) {
                            setNonContinuousLayoutDivider(
                                nonContinuousLayoutDivider,
                                true);
                        }
                    }
                } else if(changeName.equals(JSplitPane.DIVIDER_SIZE_PROPERTY)){
                    divider.setDividerSize(splitPane.getDividerSize());
		    dividerSize = divider.getDividerSize();
                    splitPane.revalidate();
		    splitPane.repaint();
                }
            }
        }
    }


    /**
     * Implementation of the FocusListener that the JSplitPane UI uses.
     * <p>
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicSplitPaneUI.
     */
    public class FocusHandler extends FocusAdapter
    {
        public void focusGained(FocusEvent ev) {
            dividerKeyboardResize = true;
            splitPane.repaint();
        }

        public void focusLost(FocusEvent ev) {
            dividerKeyboardResize = false;
            splitPane.repaint();
        }
    }
    

    /**
     * Implementation of an ActionListener that the JSplitPane UI uses for
     * handling specific key presses.
     * <p>
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicSplitPaneUI.
     */
    public class KeyboardUpLeftHandler implements ActionListener
    {
        public void actionPerformed(ActionEvent ev) {
            if (dividerKeyboardResize) {
		splitPane.setDividerLocation(Math.max(0,getDividerLocation
				  (splitPane) - getKeyboardMoveIncrement()));
            }
        }
    }

    static class KeyboardUpLeftAction extends AbstractAction {
        public void actionPerformed(ActionEvent ev) {
	    JSplitPane splitPane = (JSplitPane)ev.getSource();
	    BasicSplitPaneUI ui = (BasicSplitPaneUI)splitPane.getUI();
            if (ui.dividerKeyboardResize) {
		splitPane.setDividerLocation(Math.max(0,ui.getDividerLocation
				  (splitPane) - ui.getKeyboardMoveIncrement()));
            }
        }
    }

    /**
     * Implementation of an ActionListener that the JSplitPane UI uses for
     * handling specific key presses.
     * <p>
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicSplitPaneUI.
     */
    public class KeyboardDownRightHandler implements ActionListener
    {
        public void actionPerformed(ActionEvent ev) {
            if (dividerKeyboardResize) {
                splitPane.setDividerLocation(getDividerLocation(splitPane) +
					     getKeyboardMoveIncrement());
            }
        }
    }


    static class KeyboardDownRightAction extends AbstractAction {
        public void actionPerformed(ActionEvent ev) {
	    JSplitPane splitPane = (JSplitPane)ev.getSource();
	    BasicSplitPaneUI ui = (BasicSplitPaneUI)splitPane.getUI();
            if (ui.dividerKeyboardResize) {
                splitPane.setDividerLocation(ui.getDividerLocation(splitPane) +
					     ui.getKeyboardMoveIncrement());
            }
        }
    }
    

    /**
     * Implementation of an ActionListener that the JSplitPane UI uses for
     * handling specific key presses.
     * <p>
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicSplitPaneUI.
     */
    public class KeyboardHomeHandler implements ActionListener
    {
        public void actionPerformed(ActionEvent ev) {
            if (dividerKeyboardResize) {
                splitPane.setDividerLocation(0);
            }
        }
    }

    static class KeyboardHomeAction extends AbstractAction {
        public void actionPerformed(ActionEvent ev) {
	    JSplitPane splitPane = (JSplitPane)ev.getSource();
	    BasicSplitPaneUI ui = (BasicSplitPaneUI)splitPane.getUI();
            if (ui.dividerKeyboardResize) {
                splitPane.setDividerLocation(0);
            }
        }
    }
    

    /**
     * Implementation of an ActionListener that the JSplitPane UI uses for
     * handling specific key presses.
     * <p>
     * This inner class is marked &quot;public&quot; due to a compiler bug.
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicSplitPaneUI.
     */
    public class KeyboardEndHandler implements ActionListener
    {
        public void actionPerformed(ActionEvent ev) {
            if (dividerKeyboardResize) {
		Insets   insets = splitPane.getInsets();
		int      bottomI = (insets != null) ? insets.bottom : 0;
		int      rightI = (insets != null) ? insets.right : 0;

                if (orientation == JSplitPane.VERTICAL_SPLIT) {
                    splitPane.setDividerLocation(splitPane.getHeight() -
                                       bottomI);
                }
                else {