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/*
* 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.ide.dnd.aware;
import com.intellij.ide.dnd.DnDAware;
import com.intellij.openapi.util.Pair;
import com.intellij.openapi.util.SystemInfo;
import com.intellij.ui.treeStructure.Tree;
import com.intellij.util.ui.UIUtil;
import com.intellij.util.ui.tree.TreeUtil;
import com.intellij.util.ui.tree.WideSelectionTreeUI;
import org.jetbrains.annotations.NotNull;
import javax.swing.*;
import javax.swing.plaf.TreeUI;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
public class DnDAwareTree extends Tree implements DnDAware {
public DnDAwareTree() {
}
public DnDAwareTree(final TreeModel treemodel) {
super(treemodel);
}
public DnDAwareTree(final TreeNode root) {
super(root);
}
@Override
public void processMouseEvent(final MouseEvent e) {
//todo [kirillk] to delegate this to DnDEnabler
if (getToolTipText() == null && e.getID() == MouseEvent.MOUSE_ENTERED) return;
super.processMouseEvent(e);
}
@Override
protected void processMouseMotionEvent(MouseEvent e) {
if (SystemInfo.isMac && SwingUtilities.isRightMouseButton(e) && e.getID() == MouseEvent.MOUSE_DRAGGED) return;
super.processMouseMotionEvent(e);
}
@Override
public final boolean isOverSelection(final Point point) {
final TreeUI ui = getUI();
final TreePath path = ui instanceof WideSelectionTreeUI && ((WideSelectionTreeUI)ui).isWideSelection()
? getClosestPathForLocation(point.x, point.y) : getPathForLocation(point.x, point.y);
if (path == null) return false;
return isPathSelected(path);
}
@Override
public void dropSelectionButUnderPoint(final Point point) {
TreeUtil.dropSelectionButUnderPoint(this, point);
}
@Override
@NotNull
public final JComponent getComponent() {
return this;
}
public static Pair<Image, Point> getDragImage(Tree dndAwareTree, @NotNull TreePath path, Point dragOrigin) {
int row = dndAwareTree.getRowForPath(path);
Component comp = dndAwareTree.getCellRenderer().getTreeCellRendererComponent(dndAwareTree, path.getLastPathComponent(), false, true, true, row, false);
return createDragImage(dndAwareTree, comp, dragOrigin, true);
}
public static Pair<Image, Point> getDragImage(Tree dndAwareTree, final String text, Point dragOrigin) {
return createDragImage(dndAwareTree, new JLabel(text), dragOrigin, false);
}
private static Pair<Image, Point> createDragImage(final Tree tree, final Component c, Point dragOrigin, boolean adjustToPathUnderDragOrigin) {
if (c instanceof JComponent) {
((JComponent)c).setOpaque(true);
}
c.setForeground(tree.getForeground());
c.setBackground(tree.getBackground());
c.setFont(tree.getFont());
c.setSize(c.getPreferredSize());
final BufferedImage image = UIUtil.createImage(c.getWidth(), c.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = (Graphics2D)image.getGraphics();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f));
c.paint(g2);
g2.dispose();
Point point = new Point(-image.getWidth(null) / 2, -image.getHeight(null) / 2);
if (adjustToPathUnderDragOrigin) {
TreePath path = tree.getPathForLocation(dragOrigin.x, dragOrigin.y);
if (path != null) {
Rectangle bounds = tree.getPathBounds(path);
point = new Point(bounds.x - dragOrigin.x, bounds.y - dragOrigin.y);
}
}
return new Pair<Image, Point>(image, point);
}
}
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