diff -r fd16c54261b3 -r 90ce3da70b43 jdk/src/solaris/classes/sun/awt/X11/XMouseDragGestureRecognizer.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jdk/src/solaris/classes/sun/awt/X11/XMouseDragGestureRecognizer.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,233 @@ +/* + * Copyright 2003 Sun Microsystems, Inc. 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. Sun designates this + * particular file as subject to the "Classpath" exception as provided + * by Sun in the LICENSE file that accompanied this code. + * + * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + */ + +package sun.awt.X11; + +import java.awt.Toolkit; +import java.awt.Component; + +import java.awt.Point; +import java.awt.dnd.DnDConstants; +import java.awt.dnd.DragSource; +import java.awt.dnd.MouseDragGestureRecognizer; +import java.awt.dnd.DragGestureListener; + +import java.awt.event.InputEvent; +import java.awt.event.MouseEvent; +import java.awt.event.MouseListener; +import java.awt.event.MouseMotionListener; + +import java.lang.reflect.*; + +import sun.awt.dnd.SunDragSourceContextPeer; + +/** + *

+ * This subclass of MouseDragGestureRecognizer defines a DragGestureRecognizer + * for Mouse based gestures on OSF/Motif. + *

+ * + * @author Laurence P. G. Cable + * + * @see java.awt.dnd.DragGestureListener + * @see java.awt.dnd.DragGestureEvent + * @see java.awt.dnd.DragSource + */ + +class XMouseDragGestureRecognizer extends MouseDragGestureRecognizer { + + private static final long serialVersionUID = -841711780352520383L; + + /* + * constant for number of pixels hysterisis before drag is determined + * to have started + */ + + protected static int motionThreshold; + + + protected static final int ButtonMask = InputEvent.BUTTON1_DOWN_MASK | + InputEvent.BUTTON2_DOWN_MASK | + InputEvent.BUTTON3_DOWN_MASK; + + /** + * construct a new XMouseDragGestureRecognizer + * + * @param ds The DragSource for the Component c + * @param c The Component to observe + * @param act The actions permitted for this Drag + * @param dgl The DragGestureRecognizer to notify when a gesture is detected + * + */ + + protected XMouseDragGestureRecognizer(DragSource ds, Component c, int act, DragGestureListener dgl) { + super(ds, c, act, dgl); + } + + /** + * construct a new XMouseDragGestureRecognizer + * + * @param ds The DragSource for the Component c + * @param c The Component to observe + * @param act The actions permitted for this Drag + */ + + protected XMouseDragGestureRecognizer(DragSource ds, Component c, int act) { + this(ds, c, act, null); + } + + /** + * construct a new XMouseDragGestureRecognizer + * + * @param ds The DragSource for the Component c + * @param c The Component to observe + */ + + protected XMouseDragGestureRecognizer(DragSource ds, Component c) { + this(ds, c, DnDConstants.ACTION_NONE); + } + + /** + * construct a new XMouseDragGestureRecognizer + * + * @param ds The DragSource for the Component c + */ + + protected XMouseDragGestureRecognizer(DragSource ds) { + this(ds, null); + } + + /** + * determine the drop action from the event + */ + + protected int mapDragOperationFromModifiers(MouseEvent e) { + int mods = e.getModifiersEx(); + int btns = mods & ButtonMask; + + // Do not allow right mouse button drag since Motif DnD does not + // terminate drag operation on right mouse button release. + if (!(btns == InputEvent.BUTTON1_DOWN_MASK || + btns == InputEvent.BUTTON2_DOWN_MASK)) { + return DnDConstants.ACTION_NONE; + } + + return + SunDragSourceContextPeer.convertModifiersToDropAction(mods, + getSourceActions()); + } + + /** + * Invoked when the mouse has been clicked on a component. + */ + + public void mouseClicked(MouseEvent e) { + // do nothing + } + + /** + * Invoked when a mouse button has been pressed on a component. + */ + + public void mousePressed(MouseEvent e) { + events.clear(); + + if (mapDragOperationFromModifiers(e) != DnDConstants.ACTION_NONE) { + try { + motionThreshold = DragSource.getDragThreshold(); + } catch (Exception exc) { + motionThreshold = 5; + } + appendEvent(e); + } + } + + /** + * Invoked when a mouse button has been released on a component. + */ + + public void mouseReleased(MouseEvent e) { + events.clear(); + } + + /** + * Invoked when the mouse enters a component. + */ + + public void mouseEntered(MouseEvent e) { + events.clear(); + } + + /** + * Invoked when the mouse exits a component. + */ + + public void mouseExited(MouseEvent e) { + if (!events.isEmpty()) { // gesture pending + int dragAction = mapDragOperationFromModifiers(e); + + if (dragAction == DnDConstants.ACTION_NONE) { + events.clear(); + } + } + } + + /** + * Invoked when a mouse button is pressed on a component. + */ + + public void mouseDragged(MouseEvent e) { + if (!events.isEmpty()) { // gesture pending + int dop = mapDragOperationFromModifiers(e); + + + if (dop == DnDConstants.ACTION_NONE) { + return; + } + + MouseEvent trigger = (MouseEvent)events.get(0); + + Point origin = trigger.getPoint(); + Point current = e.getPoint(); + + int dx = Math.abs(origin.x - current.x); + int dy = Math.abs(origin.y - current.y); + + if (dx > motionThreshold || dy > motionThreshold) { + fireDragGestureRecognized(dop, ((MouseEvent)getTriggerEvent()).getPoint()); + } else + appendEvent(e); + } + } + + /** + * Invoked when the mouse button has been moved on a component + * (with no buttons no down). + */ + + public void mouseMoved(MouseEvent e) { + // do nothing + } +}