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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/awt/dnd/GtkMouseDragGestureRecognizer.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/awt/dnd/GtkMouseDragGestureRecognizer.java')
-rw-r--r-- | libjava/classpath/gnu/java/awt/dnd/GtkMouseDragGestureRecognizer.java | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/dnd/GtkMouseDragGestureRecognizer.java b/libjava/classpath/gnu/java/awt/dnd/GtkMouseDragGestureRecognizer.java new file mode 100644 index 000000000..4ef8c2918 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/dnd/GtkMouseDragGestureRecognizer.java @@ -0,0 +1,172 @@ +/* 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; + } +} |