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BobHansonBobHanson
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preliminary -- not implemented -- JSTreeUI
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‎sources/net.sf.j2s.java.core/src/javax/swing/plaf/basic/DragRecognitionSupport.java‎

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/*
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* Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.swing.plaf.basic;
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import java.awt.dnd.DragSource;
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import java.awt.event.MouseEvent;
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import javax.swing.JComponent;
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import javax.swing.SwingUtilities;
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import javax.swing.TransferHandler;
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import sun.awt.AppContext;
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import sun.awt.dnd.SunDragSourceContextPeer;
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/**
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* Drag gesture recognition support for classes that have a
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* <code>TransferHandler</code>. The gesture for a drag in this class is a mouse
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* press followed by movement by <code>DragSource.getDragThreshold()</code>
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* pixels. An instance of this class is maintained per AppContext, and the
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* public static methods call into the appropriate instance.
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*
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* @author Shannon Hickey
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*/
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class DragRecognitionSupport {
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private int motionThreshold;
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private MouseEvent dndArmedEvent;
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private JComponent component;
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/**
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* This interface allows us to pass in a handler to mouseDragged,
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* so that we can be notified immediately before a drag begins.
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*/
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public static interface BeforeDrag {
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public void dragStarting(MouseEvent me);
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}
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/**
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* Returns the DragRecognitionSupport for the caller's AppContext.
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*/
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private static DragRecognitionSupport getDragRecognitionSupport() {
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DragRecognitionSupport support =
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(DragRecognitionSupport)AppContext.getAppContext().
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get(DragRecognitionSupport.class);
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if (support == null) {
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support = new DragRecognitionSupport();
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AppContext.getAppContext().put(DragRecognitionSupport.class, support);
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}
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return support;
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}
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/**
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* Returns whether or not the event is potentially part of a drag sequence.
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*/
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public static boolean mousePressed(MouseEvent me) {
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return getDragRecognitionSupport().mousePressedImpl(me);
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}
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/**
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* If a dnd recognition has been going on, return the MouseEvent
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* that started the recognition. Otherwise, return null.
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*/
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public static MouseEvent mouseReleased(MouseEvent me) {
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return getDragRecognitionSupport().mouseReleasedImpl(me);
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}
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/**
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* Returns whether or not a drag gesture recognition is ongoing.
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*/
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public static boolean mouseDragged(MouseEvent me, BeforeDrag bd) {
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return getDragRecognitionSupport().mouseDraggedImpl(me, bd);
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}
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private void clearState() {
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dndArmedEvent = null;
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component = null;
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}
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private int mapDragOperationFromModifiers(MouseEvent me,
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TransferHandler th) {
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if (th == null || !SwingUtilities.isLeftMouseButton(me)) {
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return TransferHandler.NONE;
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}
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return SunDragSourceContextPeer.
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convertModifiersToDropAction(me.getModifiersEx(),
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th.getSourceActions(component));
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}
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/**
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* Returns whether or not the event is potentially part of a drag sequence.
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*/
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private boolean mousePressedImpl(MouseEvent me) {
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component = (JComponent)me.getSource();
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if (mapDragOperationFromModifiers(me, component.getTransferHandler())
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!= TransferHandler.NONE) {
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motionThreshold = DragSource.getDragThreshold();
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dndArmedEvent = me;
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return true;
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}
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clearState();
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return false;
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}
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/**
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* If a dnd recognition has been going on, return the MouseEvent
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* that started the recognition. Otherwise, return null.
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*/
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private MouseEvent mouseReleasedImpl(MouseEvent me) {
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/* no recognition has been going on */
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if (dndArmedEvent == null) {
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return null;
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}
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MouseEvent retEvent = null;
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if (me.getSource() == component) {
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retEvent = dndArmedEvent;
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} // else component has changed unexpectedly, so return null
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clearState();
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return retEvent;
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}
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/**
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* Returns whether or not a drag gesture recognition is ongoing.
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*/
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private boolean mouseDraggedImpl(MouseEvent me, BeforeDrag bd) {
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/* no recognition is in progress */
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if (dndArmedEvent == null) {
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return false;
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}
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/* component has changed unexpectedly, so bail */
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if (me.getSource() != component) {
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clearState();
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return false;
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}
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int dx = Math.abs(me.getX() - dndArmedEvent.getX());
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int dy = Math.abs(me.getY() - dndArmedEvent.getY());
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if ((dx > motionThreshold) || (dy > motionThreshold)) {
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TransferHandler th = component.getTransferHandler();
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int action = mapDragOperationFromModifiers(me, th);
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if (action != TransferHandler.NONE) {
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/* notify the BeforeDrag instance */
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if (bd != null) {
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bd.dragStarting(dndArmedEvent);
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}
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th.exportAsDrag(component, dndArmedEvent, action);
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clearState();
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}
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}
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return true;
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}
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}

‎sources/net.sf.j2s.java.core/src/sun/swing/SwingUtilities2.java‎

Lines changed: 74 additions & 54 deletions
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@@ -31,7 +31,9 @@
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import static java.awt.RenderingHints.KEY_TEXT_ANTIALIASING;
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import java.awt.Color;
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import java.awt.Component;
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import java.awt.Container;
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import java.awt.Dimension;
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import java.awt.FocusTraversalPolicy;
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import java.awt.Font;
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import java.awt.FontMetrics;
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import java.awt.Graphics;
@@ -62,7 +64,9 @@
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import javax.swing.ListSelectionModel;
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import javax.swing.SwingUtilities;
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import javax.swing.UIManager;
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import javax.swing.event.TreeModelEvent;
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import javax.swing.table.TableCellRenderer;
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import javax.swing.text.DefaultCaret;
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import javax.swing.text.DefaultHighlighter;
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import javax.swing.text.Highlighter;
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import javax.swing.text.JTextComponent;
@@ -83,6 +87,8 @@
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//import java.awt.event.KeyEvent;
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//import javax.swing.UIDefaults;
8589
//import javax.swing.text.DefaultCaret;
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import javax.swing.tree.TreeModel;
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import javax.swing.tree.TreePath;
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8793
/**
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* A collection of utility methods for Swing.
@@ -122,11 +128,11 @@ public class SwingUtilities2 {
122128
*/
123129
public static final Object AA_TEXT_PROPERTY_KEY = new Object(); // AATextInfoPropertyKey
124130

125-
// /**
126-
// * Used to tell a text component, being used as an editor for table
127-
// * or tree, how many clicks it took to start editing.
128-
// */
129-
// private static final Object SKIP_CLICK_COUNT = new Object(); // skipClickCount
131+
/**
132+
* Used to tell a text component, being used as an editor for table
133+
* or tree, how many clicks it took to start editing.
134+
*/
135+
private static final Object SKIP_CLICK_COUNT = new Object(); // skipClickCount
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131137
/* Presently this class assumes default fractional metrics.
132138
* This may need to change to emulate future platform L&Fs.
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16111617
}
16121618

16131619
// SwingJS X: Key Focus
1614-
// // At this point we need this method here. But we assume that there
1615-
// // will be a common method for this purpose in the future releases.
1616-
// public static Component compositeRequestFocus(Component component) {
1617-
// if (component instanceof Container) {
1618-
// Container container = (Container)component;
1619-
// if (container.isFocusCycleRoot()) {
1620-
// FocusTraversalPolicy policy = container.getFocusTraversalPolicy();
1621-
// Component comp = policy.getDefaultComponent(container);
1622-
// if (comp!=null) {
1623-
// comp.requestFocus();
1624-
// return comp;
1625-
// }
1626-
// }
1627-
// Container rootAncestor = container.getFocusCycleRootAncestor();
1628-
// if (rootAncestor!=null) {
1629-
// FocusTraversalPolicy policy = rootAncestor.getFocusTraversalPolicy();
1630-
// Component comp = policy.getComponentAfter(rootAncestor, container);
1631-
//
1632-
// if (comp!=null && SwingUtilities.isDescendingFrom(comp, container)) {
1633-
// comp.requestFocus();
1634-
// return comp;
1635-
// }
1636-
// }
1637-
// }
1638-
// if (component.isFocusable()) {
1639-
// component.requestFocus();
1640-
// return component;
1641-
// }
1642-
// return null;
1643-
// }
1644-
//
1620+
// At this point we need this method here. But we assume that there
1621+
// will be a common method for this purpose in the future releases.
1622+
public static Component compositeRequestFocus(Component component) {
1623+
if (component instanceof Container) {
1624+
Container container = (Container)component;
1625+
if (container.isFocusCycleRoot()) {
1626+
FocusTraversalPolicy policy = container.getFocusTraversalPolicy();
1627+
Component comp = policy.getDefaultComponent(container);
1628+
if (comp!=null) {
1629+
comp.requestFocus();
1630+
return comp;
1631+
}
1632+
}
1633+
Container rootAncestor = container.getFocusCycleRootAncestor();
1634+
if (rootAncestor!=null) {
1635+
FocusTraversalPolicy policy = rootAncestor.getFocusTraversalPolicy();
1636+
Component comp = policy.getComponentAfter(rootAncestor, container);
1637+
1638+
if (comp!=null && SwingUtilities.isDescendingFrom(comp, container)) {
1639+
comp.requestFocus();
1640+
return comp;
1641+
}
1642+
}
1643+
}
1644+
if (component.isFocusable()) {
1645+
component.requestFocus();
1646+
return component;
1647+
}
1648+
return null;
1649+
}
1650+
16451651
/**
16461652
* Change focus to the visible component in {@code JTabbedPane}.
16471653
* This is not a general-purpose method and is here only to permit
@@ -1705,20 +1711,20 @@ public static boolean tabbedPaneChangeFocusTo(Component comp) {
17051711
// private static void execute(Runnable command) {
17061712
// SwingUtilities.invokeLater(command);
17071713
// }
1708-
// /**
1709-
// * Sets the {@code SKIP_CLICK_COUNT} client property on the component
1710-
// * if it is an instance of {@code JTextComponent} with a
1711-
// * {@code DefaultCaret}. This property, used for text components acting
1712-
// * as editors in a table or tree, tells {@code DefaultCaret} how many
1713-
// * clicks to skip before starting selection.
1714-
// */
1715-
// public static void setSkipClickCount(Component comp, int count) {
1716-
// if (comp instanceof JTextComponent
1717-
// && ((JTextComponent) comp).getCaret() instanceof DefaultCaret) {
1718-
//
1719-
// ((JTextComponent) comp).putClientProperty(SKIP_CLICK_COUNT, count);
1720-
// }
1721-
// }
1714+
/**
1715+
* Sets the {@code SKIP_CLICK_COUNT} client property on the component
1716+
* if it is an instance of {@code JTextComponent} with a
1717+
* {@code DefaultCaret}. This property, used for text components acting
1718+
* as editors in a table or tree, tells {@code DefaultCaret} how many
1719+
* clicks to skip before starting selection.
1720+
*/
1721+
public static void setSkipClickCount(Component comp, int count) {
1722+
if (comp instanceof JTextComponent
1723+
&& ((JTextComponent) comp).getCaret() instanceof DefaultCaret) {
1724+
1725+
((JTextComponent) comp).putClientProperty(SKIP_CLICK_COUNT, count);
1726+
}
1727+
}
17221728

17231729
// /**
17241730
// * Return the MouseEvent's click count, possibly reduced by the value of
@@ -1896,8 +1902,22 @@ public static Section liesInVertical(Rectangle rect, Point p,
18961902
return liesIn(rect, p, false, false, three);
18971903
}
18981904

1899-
public static void compositeRequestFocus(Component editorComponent) {
1900-
// TODO Auto-generated method stub
1901-
1902-
}
1905+
/**
1906+
* Returns the {@link TreePath} that identifies the changed nodes.
1907+
*
1908+
* @param event changes in a tree model
1909+
* @param model corresponing tree model
1910+
* @return the path to the changed nodes
1911+
*/
1912+
public static TreePath getTreePath(TreeModelEvent event, TreeModel model) {
1913+
TreePath path = event.getTreePath();
1914+
if ((path == null) && (model != null)) {
1915+
Object root = model.getRoot();
1916+
if (root != null) {
1917+
path = new TreePath(root);
1918+
}
1919+
}
1920+
return path;
1921+
}
1922+
19031923
}

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