| /* |
| * Copyright 2000-2012 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.openapi.vcs.changes.issueLinks; |
| |
| import com.intellij.openapi.util.Comparing; |
| import com.intellij.ui.ColoredTreeCellRenderer; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import javax.swing.*; |
| import javax.swing.tree.TreeNode; |
| import javax.swing.tree.TreePath; |
| import java.awt.*; |
| import java.awt.event.MouseEvent; |
| import java.lang.ref.WeakReference; |
| |
| /** |
| * @author yole |
| */ |
| public class TreeLinkMouseListener extends LinkMouseListenerBase { |
| private final ColoredTreeCellRenderer myRenderer; |
| protected WeakReference<TreeNode> myLastHitNode; |
| |
| public TreeLinkMouseListener(final ColoredTreeCellRenderer renderer) { |
| myRenderer = renderer; |
| } |
| |
| protected void showTooltip(final JTree tree, final MouseEvent e, final HaveTooltip launcher) { |
| final String text = tree.getToolTipText(e); |
| final String newText = launcher == null ? null : launcher.getTooltip(); |
| if (!Comparing.equal(text, newText)) { |
| tree.setToolTipText(newText); |
| } |
| } |
| |
| @Nullable |
| @Override |
| protected Object getTagAt(@NotNull final MouseEvent e) { |
| JTree tree = (JTree)e.getSource(); |
| Object tag = null; |
| HaveTooltip haveTooltip = null; |
| final TreePath path = tree.getPathForLocation(e.getX(), e.getY()); |
| if (path != null) { |
| final Rectangle rectangle = tree.getPathBounds(path); |
| assert rectangle != null; |
| int dx = e.getX() - rectangle.x; |
| final TreeNode treeNode = (TreeNode)path.getLastPathComponent(); |
| if (myLastHitNode == null || myLastHitNode.get() != treeNode) { |
| myLastHitNode = new WeakReference<TreeNode>(treeNode); |
| myRenderer.getTreeCellRendererComponent(tree, treeNode, false, false, treeNode.isLeaf(), -1, false); |
| } |
| tag = myRenderer.getFragmentTagAt(dx); |
| if (tag != null && treeNode instanceof HaveTooltip) { |
| haveTooltip = (HaveTooltip)treeNode; |
| } |
| } |
| showTooltip(tree, e, haveTooltip); |
| return tag; |
| } |
| |
| public interface HaveTooltip { |
| String getTooltip(); |
| } |
| } |