jtree.java

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

      removeSelectionPaths(paths);
  }

  public void clearSelection()
  {
    selectionModel.clearSelection();
  }
  
  public TreePath getLeadSelectionPath()
  {
    return leadSelectionPath;
  }

  /**
   * @since 1.3
   */
  public void setLeadSelectionPath(TreePath path)
  {
    if (leadSelectionPath == path)
      return;

    TreePath oldValue = leadSelectionPath;
    leadSelectionPath = path;
    firePropertyChange(LEAD_SELECTION_PATH_PROPERTY, oldValue, path);
  }

  /**
   * @since 1.3
   */
  public TreePath getAnchorSelectionPath()
  {
    return anchorSelectionPath;
  }

  /**
   * @since 1.3
   */
  public void setAnchorSelectionPath(TreePath path)
  {
    if (anchorSelectionPath == path)
      return;

    TreePath oldValue = anchorSelectionPath;
    anchorSelectionPath = path;
    firePropertyChange(ANCHOR_SELECTION_PATH_PROPERTY, oldValue, path);
  }

  public int getLeadSelectionRow()
  {
    return selectionModel.getLeadSelectionRow();
  }

  public int getMaxSelectionRow()
  {
    return selectionModel.getMaxSelectionRow();
  }

  public int getMinSelectionRow()
  {
    return selectionModel.getMinSelectionRow();
  }

  public int getSelectionCount()
  {
    return selectionModel.getSelectionCount();
  }

  public TreePath getSelectionPath()
  {
    return selectionModel.getSelectionPath();
  }

  public TreePath[] getSelectionPaths()
  {
    return selectionModel.getSelectionPaths();
  }

  public int[] getSelectionRows()
  {
    return selectionModel.getSelectionRows();
  }

  public boolean isPathSelected(TreePath path)
  {
    return selectionModel.isPathSelected(path);
  }

  public boolean isRowSelected(int row)
  {
    return selectionModel.isRowSelected(row);
  }

  public boolean isSelectionEmpty()
  {
    return selectionModel.isSelectionEmpty();
  }
  
  /**
   * Return the value of the <code>dragEnabled</code> property.
   *
   * @return the value
   * 
   * @since 1.4
   */
  public boolean getDragEnabled()
  {
    return dragEnabled;
  }

  /**
   * Set the <code>dragEnabled</code> property.
   *
   * @param enabled new value
   * 
   * @since 1.4
   */
  public void setDragEnabled(boolean enabled)
  {
    dragEnabled = enabled;
  }

  public int getRowCount()
  {
    TreeUI ui = getUI();

    if (ui != null)
      return ui.getRowCount(this);
    
    return 0;
  }
  
  public void collapsePath(TreePath path)
  {
    setExpandedState(path, false);
  }
  
  public void collapseRow(int row)
  {
    if (row < 0 || row >= getRowCount())
      return;

    TreePath path = getPathForRow(row);

    if (path != null)
      collapsePath(path);
  }

  public void expandPath(TreePath path)
  {
    // Don't expand if last path component is a leaf node.
    if ((path == null)
        || (treeModel.isLeaf(path.getLastPathComponent())))
      return;

    setExpandedState(path, true);
  }
  
  public void expandRow(int row)
  {
    if (row < 0 || row >= getRowCount())
      return;

    TreePath path = getPathForRow(row);

    if (path != null)
      expandPath(path);
  }

  public boolean isCollapsed(TreePath path)
  {
    return ! isExpanded(path);
  }

  public boolean isCollapsed(int row)
  {
    if (row < 0 || row >= getRowCount())
      return false;

    TreePath path = getPathForRow(row);

    if (path != null)
      return isCollapsed(path);

    return false;
  }

  public boolean isExpanded(TreePath path)
  {
    if (path == null)
      return false;

    Object state = nodeStates.get(path);

    if ((state == null) || (state != EXPANDED))
      return false;

    TreePath parent = path.getParentPath();

    if (parent != null)
      return isExpanded(parent);
    
    return true;
  }
  
  public boolean isExpanded(int row)
  {
    if (row < 0 || row >= getRowCount())
      return false;

    TreePath path = getPathForRow(row);

    if (path != null)
      return isExpanded(path);

    return false;
  }

  /**
   * @since 1.3
   */
  public boolean getExpandsSelectedPaths()
  {
    return expandsSelectedPaths;
  }

  /**
   * @since 1.3
   */
  public void setExpandsSelectedPaths(boolean flag)
  {
    if (expandsSelectedPaths == flag)
      return;

    boolean oldValue = expandsSelectedPaths;
    expandsSelectedPaths = flag;
    firePropertyChange(EXPANDS_SELECTED_PATHS_PROPERTY, oldValue, flag);
  }

  public Rectangle getPathBounds(TreePath path)
  {
    TreeUI ui = getUI();

    if (ui == null)
      return null;

    return ui.getPathBounds(this, path);
  }

  public Rectangle getRowBounds(int row)
  {
    TreePath path = getPathForRow(row);

    if (path != null)
      return getPathBounds(path);

    return null;
  }

  public boolean isEditing()
  {
    TreeUI ui = getUI();

    if (ui != null)
      return ui.isEditing(this);

    return false;
  }

  public boolean stopEditing()
  {
    TreeUI ui = getUI();

    if (ui != null)
      return ui.stopEditing(this);

   return false;
  }

  public void cancelEditing()
  {
    TreeUI ui = getUI();

    if (ui != null)
      ui.cancelEditing(this);
  }

  public void startEditingAtPath(TreePath path)
  {
    TreeUI ui = getUI();

    if (ui != null)
      ui.startEditingAtPath(this, path);
  }

  public TreePath getEditingPath()
  {
    TreeUI ui = getUI();

    if (ui != null)
      return ui.getEditingPath(this);

    return null;
  }

  public TreePath getPathForLocation(int x, int y)
  {
    TreePath path = getClosestPathForLocation(x, y);

    if (path != null)
      {
	 Rectangle rect = getPathBounds(path);

	 if ((rect != null) && rect.contains(x, y))
	   return path;
      }

    return null;
  }

  public int getRowForLocation(int x, int y)
  {
    TreePath path = getPathForLocation(x, y);

    if (path != null)
      return getRowForPath(path);

    return -1;
  }
  
  public TreePath getClosestPathForLocation(int x, int y)
  {
    TreeUI ui = getUI();

    if (ui != null)
      return ui.getClosestPathForLocation(this, x, y);
    
    return null;
  }

  public int getClosestRowForLocation(int x, int y)
  {
    TreePath path = getClosestPathForLocation(x, y);

    if (path != null)
      return getRowForPath(path);

    return -1;
  }

  public Object getLastSelectedPathComponent()
  {
    TreePath path = getSelectionPath();

    if (path != null)
      return path.getLastPathComponent();

    return null;
  }

  private void checkExpandParents(TreePath path)
    throws ExpandVetoException
  {
    TreePath parent = path.getParentPath();

    if (parent != null)
      checkExpandParents(parent);

    fireTreeWillExpand(path);
  }

  private void doExpandParents(TreePath path, boolean state)
  {
    TreePath parent = path.getParentPath();

    if (isExpanded(parent))
      return;
    
    if (parent != null)
      doExpandParents(parent, false);

    nodeStates.put(path, state ? EXPANDED : COLLAPSED);
  }
  
  protected void setExpandedState(TreePath path, boolean state)
  {
    if (path == null)
      return;

    TreePath parent = path.getParentPath();

    try
      {
	while (parent != null)
	  checkExpandParents(parent);
      }
    catch (ExpandVetoException e)
      {
	// Expansion vetoed.
	return;
      }

    doExpandParents(path, state);
  }

  protected void clearToggledPaths()
  {
    nodeStates.clear();
  }

  protected Enumeration getDescendantToggledPaths(TreePath parent)
  {
    if (parent == null)
      return null;

    Enumeration nodes = nodeStates.keys();
    Vector result = new Vector();

    while (nodes.hasMoreElements())
      {
        TreePath path = (TreePath) nodes.nextElement();

        if (path.isDescendant(parent))
          result.addElement(path);
      }
    
    return result.elements();
  }

  public boolean hasBeenExpanded(TreePath path)
  {
    if (path == null)
      return false;

    return nodeStates.get(path) != null;
  }

  public boolean isVisible(TreePath path)
  {
    if (path == null)
      return false;

    TreePath parent = path.getParentPath();

    if (parent == null)
      return true; // Is root node.

    return isExpanded(parent);
  }

  public void makeVisible(TreePath path)
  {
    if (path == null)
      return;

    expandPath(path.getParentPath());
  }

  public boolean isPathEditable(TreePath path)
  {    
    return isEditable();
  }
}