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
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index 000000000..4ef8c2918
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+++ 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;
+  }
+}