| /* GtkMouseDragGestureRecognizer.java -- |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.awt.dnd; |
| |
| import java.awt.Component; |
| import java.awt.Point; |
| import java.awt.dnd.DnDConstants; |
| import java.awt.dnd.DragGestureListener; |
| import java.awt.dnd.DragSource; |
| import java.awt.dnd.MouseDragGestureRecognizer; |
| import java.awt.event.MouseEvent; |
| |
| public class GtkMouseDragGestureRecognizer |
| extends MouseDragGestureRecognizer |
| { |
| |
| public GtkMouseDragGestureRecognizer (DragSource ds) |
| { |
| this(ds, null, 0, null); |
| } |
| |
| public GtkMouseDragGestureRecognizer (DragSource ds, Component c) |
| { |
| this (ds, c, 0, null); |
| } |
| |
| public GtkMouseDragGestureRecognizer (DragSource ds, Component c, int act) |
| { |
| this(ds, c, act, null); |
| } |
| |
| public GtkMouseDragGestureRecognizer (DragSource ds, Component c, int act, |
| DragGestureListener dgl) |
| { |
| super(ds, c, act, dgl); |
| } |
| |
| public void registerListeners () |
| { |
| super.registerListeners(); |
| } |
| |
| public void unregisterListeners () |
| { |
| super.unregisterListeners(); |
| } |
| |
| public void mouseClicked (MouseEvent e) |
| { |
| // Nothing to do here. |
| } |
| |
| public void mousePressed (MouseEvent e) |
| { |
| events.clear(); |
| if (getDropActionFromEvent(e) != DnDConstants.ACTION_NONE) |
| appendEvent(e); |
| } |
| |
| public void mouseReleased (MouseEvent e) |
| { |
| events.clear(); |
| } |
| |
| public void mouseEntered (MouseEvent e) |
| { |
| events.clear(); |
| } |
| |
| public void mouseExited(MouseEvent e) |
| { |
| if (!events.isEmpty()) |
| if (getDropActionFromEvent(e) == DnDConstants.ACTION_NONE) |
| events.clear(); |
| } |
| |
| public void mouseDragged(MouseEvent e) |
| { |
| if (!events.isEmpty()) |
| { |
| int act = getDropActionFromEvent(e); |
| |
| if (act == DnDConstants.ACTION_NONE) |
| return; |
| |
| Point origin = ((MouseEvent) events.get(0)).getPoint(); |
| Point current = e.getPoint(); |
| int dx = Math.abs(origin.x - current.x); |
| int dy = Math.abs(origin.y - current.y); |
| int threshold = DragSource.getDragThreshold(); |
| |
| if (dx > threshold || dy > threshold) |
| fireDragGestureRecognized(act, origin); |
| else |
| appendEvent(e); |
| } |
| } |
| |
| public void mouseMoved (MouseEvent e) |
| { |
| // Nothing to do here. |
| } |
| |
| private int getDropActionFromEvent(MouseEvent e) |
| { |
| int modEx = e.getModifiersEx(); |
| int buttons = modEx & (MouseEvent.BUTTON1_DOWN_MASK |
| | MouseEvent.BUTTON2_DOWN_MASK | MouseEvent.BUTTON3_DOWN_MASK); |
| if (!(buttons == MouseEvent.BUTTON1_DOWN_MASK || |
| buttons == MouseEvent.BUTTON2_DOWN_MASK)) |
| return DnDConstants.ACTION_NONE; |
| |
| // Convert modifier to a drop action |
| int sourceActions = getSourceActions(); |
| int mod = modEx |
| & (MouseEvent.SHIFT_DOWN_MASK | MouseEvent.CTRL_DOWN_MASK); |
| switch (mod) |
| { |
| case MouseEvent.SHIFT_DOWN_MASK | MouseEvent.CTRL_DOWN_MASK: |
| return DnDConstants.ACTION_LINK & sourceActions; |
| case MouseEvent.CTRL_DOWN_MASK: |
| return DnDConstants.ACTION_COPY & sourceActions; |
| case MouseEvent.SHIFT_DOWN_MASK: |
| return DnDConstants.ACTION_MOVE & sourceActions; |
| default: |
| if ((sourceActions & DnDConstants.ACTION_MOVE) != 0) |
| return DnDConstants.ACTION_MOVE & sourceActions; |
| else if ((sourceActions & DnDConstants.ACTION_COPY) != 0) |
| return DnDConstants.ACTION_COPY & sourceActions; |
| else if ((sourceActions & DnDConstants.ACTION_LINK) != 0) |
| return DnDConstants.ACTION_LINK & sourceActions; |
| } |
| |
| return DnDConstants.ACTION_NONE & sourceActions; |
| } |
| } |