/* * @(#)BasicTreeUI.java	1.178 06/04/18 * * Copyright 2005 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.awt.datatransfer.*;import java.awt.dnd.*;import java.beans.*;import java.io.*;import java.util.Enumeration;import java.util.Hashtable;import java.util.TooManyListenersException;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import javax.swing.plaf.ActionMapUIResource;import javax.swing.plaf.ComponentUI;import javax.swing.plaf.UIResource;import javax.swing.plaf.TreeUI;import javax.swing.tree.*;import javax.swing.text.Position;import javax.swing.plaf.basic.DragRecognitionSupport.BeforeDrag;import com.sun.java.swing.SwingUtilities2;import static com.sun.java.swing.SwingUtilities2.DRAG_FIX;import sun.swing.DefaultLookup;import sun.swing.UIAction;/** * The basic L&F for a hierarchical data structure. * <p> * * @version 1.178 04/18/06 * @author Scott Violet * @author Shannon Hickey (improved drag recognition) */public class BasicTreeUI extends TreeUI{    // Old actions forward to an instance of this.    static private final Actions SHARED_ACTION = new Actions();    static private final Insets EMPTY_INSETS = new Insets(0, 0, 0, 0);    transient protected Icon        collapsedIcon;    transient protected Icon        expandedIcon;    /**      * Color used to draw hash marks.  If <code>null</code> no hash marks      * will be drawn.      */    private Color hashColor;    /** Distance between left margin and where vertical dashes will be      * drawn. */    protected int               leftChildIndent;    /** Distance to add to leftChildIndent to determine where cell      * contents will be drawn. */    protected int               rightChildIndent;    /** Total distance that will be indented.  The sum of leftChildIndent      * and rightChildIndent. */    protected int               totalChildIndent;    /** Minimum preferred size. */    protected Dimension         preferredMinSize;    /** Index of the row that was last selected. */    protected int               lastSelectedRow;    /** Component that we're going to be drawing into. */    protected JTree             tree;    /** Renderer that is being used to do the actual cell drawing. */    transient protected TreeCellRenderer   currentCellRenderer;    /** Set to true if the renderer that is currently in the tree was     * created by this instance. */    protected boolean           createdRenderer;    /** Editor for the tree. */    transient protected TreeCellEditor     cellEditor;    /** Set to true if editor that is currently in the tree was     * created by this instance. */    protected boolean           createdCellEditor;    /** Set to false when editing and shouldSelectCell() returns true meaning      * the node should be selected before editing, used in completeEditing. */    protected boolean           stopEditingInCompleteEditing;    /** Used to paint the TreeCellRenderer. */    protected CellRendererPane  rendererPane;    /** Size needed to completely display all the nodes. */    protected Dimension         preferredSize;    /** Is the preferredSize valid? */    protected boolean           validCachedPreferredSize;    /** Object responsible for handling sizing and expanded issues. */    protected AbstractLayoutCache  treeState;    /** Used for minimizing the drawing of vertical lines. */    protected Hashtable<TreePath,Boolean> drawingCache;    /** True if doing optimizations for a largeModel. Subclasses that     * don't support this may wish to override createLayoutCache to not     * return a FixedHeightLayoutCache instance. */    protected boolean           largeModel;    /** Reponsible for telling the TreeState the size needed for a node. */    protected AbstractLayoutCache.NodeDimensions     nodeDimensions;    /** Used to determine what to display. */    protected TreeModel         treeModel;    /** Model maintaing the selection. */    protected TreeSelectionModel treeSelectionModel;    /** How much the depth should be offset to properly calculate     * x locations. This is based on whether or not the root is visible,     * and if the root handles are visible. */    protected int               depthOffset;    /** Last width the tree was at when painted. This is used when     * !leftToRigth to notice the bounds have changed so that we can instruct     * the TreeState to relayout. */    private int                 lastWidth;    // Following 4 ivars are only valid when editing.    /** When editing, this will be the Component that is doing the actual      * editing. */    protected Component         editingComponent;    /** Path that is being edited. */    protected TreePath          editingPath;    /** Row that is being edited. Should only be referenced if     * editingComponent is not null. */    protected int               editingRow;    /** Set to true if the editor has a different size than the renderer. */    protected boolean           editorHasDifferentSize;    /** Row correspondin to lead path. */    private int                 leadRow;    /** If true, the property change event for LEAD_SELECTION_PATH_PROPERTY,     * or ANCHOR_SELECTION_PATH_PROPERTY will not generate a repaint. */    private boolean             ignoreLAChange;    /** Indicates the orientation. */    private boolean             leftToRight;    // Cached listeners    private PropertyChangeListener propertyChangeListener;    private PropertyChangeListener selectionModelPropertyChangeListener;    private MouseListener mouseListener;    private FocusListener focusListener;    private KeyListener keyListener;    /** Used for large models, listens for moved/resized events and     * updates the validCachedPreferredSize bit accordingly. */    private ComponentListener   componentListener;    /** Listens for CellEditor events. */    private CellEditorListener  cellEditorListener;    /** Updates the display when the selection changes. */    private TreeSelectionListener treeSelectionListener;    /** Is responsible for updating the display based on model events. */    private TreeModelListener treeModelListener;    /** Updates the treestate as the nodes expand. */    private TreeExpansionListener treeExpansionListener;    /** UI property indicating whether to paint lines */    private boolean paintLines = true;    /** UI property for painting dashed lines */    private boolean lineTypeDashed;    /**     * The time factor to treate the series of typed alphanumeric key     * as prefix for first letter navigation.     */    private long timeFactor = 1000L;    private Handler handler;    /**     * A temporary variable for communication between startEditingOnRelease     * and startEditing.     */    private MouseEvent releaseEvent;    public static ComponentUI createUI(JComponent x) {	return new BasicTreeUI();    }    static void loadActionMap(LazyActionMap map) {	map.put(new Actions(Actions.SELECT_PREVIOUS));        map.put(new Actions(Actions.SELECT_PREVIOUS_CHANGE_LEAD));	map.put(new Actions(Actions.SELECT_PREVIOUS_EXTEND_SELECTION));	map.put(new Actions(Actions.SELECT_NEXT));	map.put(new Actions(Actions.SELECT_NEXT_CHANGE_LEAD));	map.put(new Actions(Actions.SELECT_NEXT_EXTEND_SELECTION));	map.put(new Actions(Actions.SELECT_CHILD));	map.put(new Actions(Actions.SELECT_CHILD_CHANGE_LEAD));	map.put(new Actions(Actions.SELECT_PARENT));	map.put(new Actions(Actions.SELECT_PARENT_CHANGE_LEAD));	map.put(new Actions(Actions.SCROLL_UP_CHANGE_SELECTION));	map.put(new Actions(Actions.SCROLL_UP_CHANGE_LEAD));	map.put(new Actions(Actions.SCROLL_UP_EXTEND_SELECTION));	map.put(new Actions(Actions.SCROLL_DOWN_CHANGE_SELECTION));	map.put(new Actions(Actions.SCROLL_DOWN_EXTEND_SELECTION));	map.put(new Actions(Actions.SCROLL_DOWN_CHANGE_LEAD));	map.put(new Actions(Actions.SELECT_FIRST));	map.put(new Actions(Actions.SELECT_FIRST_CHANGE_LEAD));	map.put(new Actions(Actions.SELECT_FIRST_EXTEND_SELECTION));	map.put(new Actions(Actions.SELECT_LAST));	map.put(new Actions(Actions.SELECT_LAST_CHANGE_LEAD));	map.put(new Actions(Actions.SELECT_LAST_EXTEND_SELECTION));	map.put(new Actions(Actions.TOGGLE));	map.put(new Actions(Actions.CANCEL_EDITING));	map.put(new Actions(Actions.START_EDITING));	map.put(new Actions(Actions.SELECT_ALL));	map.put(new Actions(Actions.CLEAR_SELECTION));	map.put(new Actions(Actions.SCROLL_LEFT));	map.put(new Actions(Actions.SCROLL_RIGHT));	map.put(new Actions(Actions.SCROLL_LEFT_EXTEND_SELECTION));	map.put(new Actions(Actions.SCROLL_RIGHT_EXTEND_SELECTION));	map.put(new Actions(Actions.SCROLL_RIGHT_CHANGE_LEAD));	map.put(new Actions(Actions.SCROLL_LEFT_CHANGE_LEAD));        map.put(new Actions(Actions.EXPAND));        map.put(new Actions(Actions.COLLAPSE));        map.put(new Actions(Actions.MOVE_SELECTION_TO_PARENT));        map.put(new Actions(Actions.ADD_TO_SELECTION));        map.put(new Actions(Actions.TOGGLE_AND_ANCHOR));        map.put(new Actions(Actions.EXTEND_TO));        map.put(new Actions(Actions.MOVE_SELECTION_TO));        map.put(TransferHandler.getCutAction());        map.put(TransferHandler.getCopyAction());        map.put(TransferHandler.getPasteAction());    }    public BasicTreeUI() {	super();    }    protected Color getHashColor() {        return hashColor;    }    protected void setHashColor(Color color) {        hashColor = color;    }    public void setLeftChildIndent(int newAmount) {	leftChildIndent = newAmount;	totalChildIndent = leftChildIndent + rightChildIndent;	if(treeState != null)	    treeState.invalidateSizes();	updateSize();    }    public int getLeftChildIndent() {	return leftChildIndent;    }    public void setRightChildIndent(int newAmount) {	rightChildIndent = newAmount;	totalChildIndent = leftChildIndent + rightChildIndent;	if(treeState != null)	    treeState.invalidateSizes();	updateSize();    }    public int getRightChildIndent() {	return rightChildIndent;    }    public void setExpandedIcon(Icon newG) {	expandedIcon = newG;    }    public Icon getExpandedIcon() {	return expandedIcon;    }    public void setCollapsedIcon(Icon newG) {	collapsedIcon = newG;    }    public Icon getCollapsedIcon() {	return collapsedIcon;    }    //    // Methods for configuring the behavior of the tree. None of them    // push the value to the JTree instance. You should really only    // call these methods on the JTree.    //    /**     * Updates the componentListener, if necessary.     */    protected void setLargeModel(boolean largeModel) {	if(getRowHeight() < 1)	    largeModel = false;	if(this.largeModel != largeModel) {	    completeEditing();	    this.largeModel = largeModel;	    treeState = createLayoutCache();	    configureLayoutCache();	    updateLayoutCacheExpandedNodes();	    updateSize();	}    }    protected boolean isLargeModel() {	return largeModel;    }    /**     * Sets the row height, this is forwarded to the treeState.     */    protected void setRowHeight(int rowHeight) {	completeEditing();	if(treeState != null) {	    setLargeModel(tree.isLargeModel());	    treeState.setRowHeight(rowHeight);	    updateSize();	}    }    protected int getRowHeight() {	return (tree == null) ? -1 : tree.getRowHeight();    }    /**     * Sets the TreeCellRenderer to <code>tcr</code>. This invokes     * <code>updateRenderer</code>.     */    protected void setCellRenderer(TreeCellRenderer tcr) {	completeEditing();	updateRenderer();	if(treeState != null) {	    treeState.invalidateSizes();	    updateSize();	}    }    /**     * Return currentCellRenderer, which will either be the trees     * renderer, or defaultCellRenderer, which ever wasn't null.     */    protected TreeCellRenderer getCellRenderer() {	return currentCellRenderer;    }    /**     * Sets the TreeModel.     */    protected void setModel(TreeModel model) {	completeEditing();	if(treeModel != null && treeModelListener != null)	    treeModel.removeTreeModelListener(treeModelListener);	treeModel = model;	if(treeModel != null) {	    if(treeModelListener != null)		treeModel.addTreeModelListener(treeModelListener);	}	if(treeState != null) {	    treeState.setModel(model);	    updateLayoutCacheExpandedNodes();	    updateSize();	}    }    protected TreeModel getModel() {	return treeModel;    }    /**     * Sets the root to being visible.     */    protected void setRootVisible(boolean newValue) {	completeEditing();	updateDepthOffset();	if(treeState != null) {	    treeState.setRootVisible(newValue);	    treeState.invalidateSizes();	    updateSize();	}    }    protected boolean isRootVisible() {	return (tree != null) ? tree.isRootVisible() : false;    }    /**     * Determines whether the node handles are to be displayed.     */    protected void setShowsRootHandles(boolean newValue) {	completeEditing();	updateDepthOffset();	if(treeState != null) {