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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.ui;
import com.intellij.openapi.util.Pair;
import com.intellij.ui.treeStructure.Tree;
import com.intellij.util.ui.UIUtil;
import com.intellij.util.ui.tree.WideSelectionTreeUI;
import javax.swing.*;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.plaf.TreeUI;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
import java.awt.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
public class TreeExpandableItemsHandler extends AbstractExpandableItemsHandler<Integer, JTree> {
protected TreeExpandableItemsHandler(final JTree tree) {
super(tree);
final TreeSelectionListener selectionListener = new TreeSelectionListener() {
@Override
public void valueChanged(TreeSelectionEvent e) {
updateSelection(tree);
}
};
tree.getSelectionModel().addTreeSelectionListener(selectionListener);
tree.addPropertyChangeListener(JTree.SELECTION_MODEL_PROPERTY, new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
updateSelection(tree);
if (evt.getOldValue() != null) {
((TreeSelectionModel)evt.getOldValue()).removeTreeSelectionListener(selectionListener);
}
if (evt.getNewValue() != null) {
((TreeSelectionModel)evt.getNewValue()).addTreeSelectionListener(selectionListener);
}
}
});
final TreeModelListener modelListener = new TreeModelListener() {
@Override
public void treeNodesChanged(TreeModelEvent e) {
updateCurrentSelection();
}
@Override
public void treeNodesInserted(TreeModelEvent e) {
updateSelection(tree);
}
@Override
public void treeNodesRemoved(TreeModelEvent e) {
updateSelection(tree);
}
@Override
public void treeStructureChanged(TreeModelEvent e) {
updateSelection(tree);
}
};
if (tree.getModel() != null) tree.getModel().addTreeModelListener(modelListener);
tree.addPropertyChangeListener("model", new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
updateSelection(tree);
if (evt.getOldValue() != null) {
((TreeModel)evt.getOldValue()).removeTreeModelListener(modelListener);
}
if (evt.getNewValue() != null) {
((TreeModel)evt.getNewValue()).addTreeModelListener(modelListener);
}
}
});
}
private void updateSelection(JTree tree) {
int selection = tree.getSelectionCount() == 1 ? tree.getSelectionModel().getLeadSelectionRow() : -1;
handleSelectionChange(selection == -1 ? null : selection);
}
@Override
protected Integer getCellKeyForPoint(Point point) {
int rowIndex = myComponent.getRowForLocation(point.x, point.y);
return rowIndex != -1 ? rowIndex : null;
}
@Override
protected Pair<Component, Rectangle> getCellRendererAndBounds(Integer key) {
int rowIndex = key.intValue();
TreePath path = myComponent.getPathForRow(rowIndex);
if (path == null) return null;
Rectangle bounds = myComponent.getPathBounds(path);
if (bounds == null) return null;
TreeCellRenderer renderer = myComponent.getCellRenderer();
if (renderer == null) return null;
Object node = path.getLastPathComponent();
Component rendererComponent = renderer.getTreeCellRendererComponent(
myComponent,
node,
myComponent.isRowSelected(rowIndex),
myComponent.isExpanded(rowIndex),
myComponent.getModel().isLeaf(node),
rowIndex,
myComponent.hasFocus()
);
return Pair.create(rendererComponent, bounds);
}
@Override
protected Dimension getImageSize(int width, int height) {
final TreeUI ui = myComponent.getUI();
return new Dimension(width, ui instanceof WideSelectionTreeUI && ((WideSelectionTreeUI)ui).isWideSelection() ? height - 1 : height);
}
@Override
protected void doFillBackground(final int height, final int width, final Graphics2D g) {
final TreeUI ui = myComponent.getUI();
super.doFillBackground(ui instanceof WideSelectionTreeUI && ((WideSelectionTreeUI)ui).isWideSelection() ? height - 1 : height, width, g);
}
@Override
protected void doPaintTooltipImage(final Component rComponent,
final Rectangle cellBounds,
final Graphics2D g,
Integer key) {
final boolean opaque = rComponent.isOpaque();
if (rComponent instanceof JComponent) {
((JComponent)rComponent).setOpaque(true);
}
if (myComponent.isRowSelected(key)) {
rComponent.setBackground(UIUtil.getTreeSelectionBackground(myComponent.hasFocus()));
} else {
Color bg = UIUtil.getTreeTextBackground();
if (myComponent instanceof Tree && ((Tree)myComponent).isFileColorsEnabled()) {
final Color color = ((Tree)myComponent).getFileColorForPath(myComponent.getPathForRow(key));
if (color != null) {
bg = color;
}
}
rComponent.setBackground(bg);
}
super.doPaintTooltipImage(rComponent, cellBounds, g, key);
if (rComponent instanceof JComponent) {
((JComponent)rComponent).setOpaque(opaque);
}
}
}
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