/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @key headful
* @bug 8129830 8132771
* @summary JTree drag/drop on lower half of last child of container incorrect
* @run main LastNodeLowerHalfDrop
*/
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.InputEvent;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import javax.swing.DropMode;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.SwingUtilities;
import javax.swing.TransferHandler;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
public class LastNodeLowerHalfDrop {
private static DefaultMutableTreeNode b1;
private static DefaultMutableTreeNode b2;
private static DefaultMutableTreeNode c;
private static JTree jTree;
private static DefaultMutableTreeNode a;
private static DefaultMutableTreeNode b;
private static DefaultMutableTreeNode a1;
private static Point dragPoint;
private static Point dropPoint;
private static JFrame f;
private static DefaultMutableTreeNode c1;
private static DefaultMutableTreeNode root;
public static void main(String[] args) throws Exception {
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new LastNodeLowerHalfDrop().getContent());
f.setSize(400, 400);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
});
testCase(b2, a1, +0.4f);
if (!"b2".equals(jTree.getModel().
getChild(a, a.getChildCount() - 1).toString())) {
cleanUp();
throw new RuntimeException("b1 was not inserted "
+"in the last position in a");
}
testCase(c1, c, -0.4f);
if (!"c1".equals(jTree.getModel().getChild(root, 2).toString())) {
cleanUp();
throw new RuntimeException("c1 was not inserted "
+"between c and b nodes");
}
cleanUp();
}
private static void cleanUp() throws Exception {
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
f.dispose();
}
});
}
private static void testCase(final DefaultMutableTreeNode drag,
final DefaultMutableTreeNode drop, final float shift)
throws Exception {
Robot robot = new Robot();
robot.waitForIdle();
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
Rectangle rectDrag =
jTree.getPathBounds(new TreePath(drag.getPath()));
dragPoint = new Point((int)rectDrag.getCenterX(),
(int) rectDrag.getCenterY());
SwingUtilities.convertPointToScreen(dragPoint, jTree);
Rectangle rectDrop =
jTree.getPathBounds(new TreePath(drop.getPath()));
dropPoint = new Point(rectDrop.x + 5,
(int) (rectDrop.getCenterY() + shift * rectDrop.height));
SwingUtilities.convertPointToScreen(dropPoint, jTree);
}
});
robot.mouseMove(dragPoint.x, dragPoint.y);
robot.mousePress(InputEvent.BUTTON1_MASK);
robot.delay(1000);
robot.mouseMove(dropPoint.x, dropPoint.y);
robot.delay(1000);
robot.mouseRelease(InputEvent.BUTTON1_MASK);
robot.delay(1000);
robot.waitForIdle();
}
private JScrollPane getContent() {
jTree = new JTree(getTreeModel());
jTree.setRootVisible(false);
jTree.setDragEnabled(true);
jTree.setDropMode(DropMode.INSERT);
jTree.setTransferHandler(new TreeTransferHandler());
jTree.getSelectionModel().setSelectionMode(
TreeSelectionModel.SINGLE_TREE_SELECTION);
expandTree(jTree);
return new JScrollPane(jTree);
}
protected static TreeModel getTreeModel() {
root = new DefaultMutableTreeNode("Root");
a = new DefaultMutableTreeNode("A");
root.add(a);
a1 = new DefaultMutableTreeNode("a1");
a.add(a1);
b = new DefaultMutableTreeNode("B");
root.add(b);
b1 = new DefaultMutableTreeNode("b1");
b.add(b1);
b2 = new DefaultMutableTreeNode("b2");
b.add(b2);
c = new DefaultMutableTreeNode("C");
root.add(c);
c1 = new DefaultMutableTreeNode("c1");
c.add(c1);
return new DefaultTreeModel(root);
}
private void expandTree(JTree tree) {
DefaultMutableTreeNode root = (DefaultMutableTreeNode) tree.getModel()
.getRoot();
Enumeration e = root.breadthFirstEnumeration();
while (e.hasMoreElements()) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) e.nextElement();
if (node.isLeaf()) {
continue;
}
int row = tree.getRowForPath(new TreePath(node.getPath()));
tree.expandRow(row);
}
}
}
class TreeTransferHandler extends TransferHandler {
DataFlavor nodesFlavor;
DataFlavor[] flavors = new DataFlavor[1];
DefaultMutableTreeNode[] nodesToRemove;
public TreeTransferHandler() {
try {
String mimeType = DataFlavor.javaJVMLocalObjectMimeType
+ ";class=\""
+ javax.swing.tree.DefaultMutableTreeNode[].class.getName()
+ "\"";
nodesFlavor = new DataFlavor(mimeType);
flavors[0] = nodesFlavor;
} catch (ClassNotFoundException e) {
System.out.println("ClassNotFound: " + e.getMessage());
}
}
@Override
public boolean canImport(TransferHandler.TransferSupport support) {
if (!support.isDrop()) {
return false;
}
support.setShowDropLocation(true);
if (!support.isDataFlavorSupported(nodesFlavor)) {
return false;
}
// Do not allow a drop on the drag source selections.
JTree.DropLocation dl = (JTree.DropLocation) support.getDropLocation();
JTree tree = (JTree) support.getComponent();
int dropRow = tree.getRowForPath(dl.getPath());
int[] selRows = tree.getSelectionRows();
for (int i = 0; i < selRows.length; i++) {
if (selRows[i] == dropRow) {
return false;
}
}
// Do not allow MOVE-action drops if a non-leaf node is
// selected unless all of its children are also selected.
int action = support.getDropAction();
if (action == MOVE) {
return haveCompleteNode(tree);
}
// Do not allow a non-leaf node to be copied to a level
// which is less than its source level.
TreePath dest = dl.getPath();
DefaultMutableTreeNode target = (DefaultMutableTreeNode)
dest.getLastPathComponent();
TreePath path = tree.getPathForRow(selRows[0]);
DefaultMutableTreeNode firstNode = (DefaultMutableTreeNode)
path.getLastPathComponent();
if (firstNode.getChildCount() > 0
&& target.getLevel() < firstNode.getLevel()) {
return false;
}
return true;
}
private boolean haveCompleteNode(JTree tree) {
int[] selRows = tree.getSelectionRows();
TreePath path = tree.getPathForRow(selRows[0]);
DefaultMutableTreeNode first = (DefaultMutableTreeNode)
path.getLastPathComponent();
int childCount = first.getChildCount();
// first has children and no children are selected.
if (childCount > 0 && selRows.length == 1) {
return false;
}
// first may have children.
for (int i = 1; i < selRows.length; i++) {
path = tree.getPathForRow(selRows[i]);
DefaultMutableTreeNode next = (DefaultMutableTreeNode)
path.getLastPathComponent();
if (first.isNodeChild(next)) {
// Found a child of first.
if (childCount > selRows.length - 1) {
// Not all children of first are selected.
return false;
}
}
}
return true;
}
@Override
protected Transferable createTransferable(JComponent c) {
JTree tree = (JTree) c;
TreePath[] paths = tree.getSelectionPaths();
if (paths != null) {
// Make up a node array of copies for transfer and
// another for/of the nodes that will be removed in
// exportDone after a successful drop.
List<DefaultMutableTreeNode> copies = new ArrayList<>();
List<DefaultMutableTreeNode> toRemove = new ArrayList<>();
DefaultMutableTreeNode node = (DefaultMutableTreeNode)
paths[0].getLastPathComponent();
DefaultMutableTreeNode copy = copy(node);
copies.add(copy);
toRemove.add(node);
for (int i = 1; i < paths.length; i++) {
DefaultMutableTreeNode next = (DefaultMutableTreeNode) paths[i]
.getLastPathComponent();
// Do not allow higher level nodes to be added to list.
if (next.getLevel() < node.getLevel()) {
break;
} else if (next.getLevel() > node.getLevel()) { // child node
copy.add(copy(next));
// node already contains child
} else { // sibling
copies.add(copy(next));
toRemove.add(next);
}
}
DefaultMutableTreeNode[] nodes = copies
.toArray(new DefaultMutableTreeNode[copies.size()]);
nodesToRemove = toRemove.toArray(
new DefaultMutableTreeNode[toRemove.size()]);
return new NodesTransferable(nodes);
}
return null;
}
/**
* Defensive copy used in createTransferable.
*/
private DefaultMutableTreeNode copy(TreeNode node) {
return new DefaultMutableTreeNode(node);
}
@Override
protected void exportDone(JComponent source, Transferable data, int action) {
if ((action & MOVE) == MOVE) {
JTree tree = (JTree) source;
DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
// Remove nodes saved in nodesToRemove in createTransferable.
for (DefaultMutableTreeNode nodesToRemove1 : nodesToRemove) {
model.removeNodeFromParent(nodesToRemove1);
}
}
}
@Override
public int getSourceActions(JComponent c) {
return COPY_OR_MOVE;
}
@Override
public boolean importData(TransferHandler.TransferSupport support) {
if (!canImport(support)) {
return false;
}
// Extract transfer data.
DefaultMutableTreeNode[] nodes = null;
try {
Transferable t = support.getTransferable();
nodes = (DefaultMutableTreeNode[]) t.getTransferData(nodesFlavor);
} catch (UnsupportedFlavorException ufe) {
System.out.println("UnsupportedFlavor: " + ufe.getMessage());
} catch (java.io.IOException ioe) {
System.out.println("I/O error: " + ioe.getMessage());
}
// Get drop location info.
JTree.DropLocation dl = (JTree.DropLocation) support.getDropLocation();
int childIndex = dl.getChildIndex();
TreePath dest = dl.getPath();
DefaultMutableTreeNode parent = (DefaultMutableTreeNode)
dest.getLastPathComponent();
JTree tree = (JTree) support.getComponent();
DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
// Configure for drop mode.
int index = childIndex; // DropMode.INSERT
if (childIndex == -1) { // DropMode.ON
index = parent.getChildCount();
}
// Add data to model.
for (DefaultMutableTreeNode node : nodes) {
model.insertNodeInto(node, parent, index++);
}
return true;
}
@Override
public String toString() {
return getClass().getName();
}
public class NodesTransferable implements Transferable {
DefaultMutableTreeNode[] nodes;
public NodesTransferable(DefaultMutableTreeNode[] nodes) {
this.nodes = nodes;
}
@Override
public Object getTransferData(DataFlavor flavor)
throws UnsupportedFlavorException {
if (!isDataFlavorSupported(flavor)) {
throw new UnsupportedFlavorException(flavor);
}
return nodes;
}
@Override
public DataFlavor[] getTransferDataFlavors() {
return flavors;
}
@Override
public boolean isDataFlavorSupported(DataFlavor flavor) {
return nodesFlavor.equals(flavor);
}
}
}