Adding drag & drop event support.

widget/src/gtk/nsWindow.cpp

@@ -246,15 +246,14 @@ NS_METHOD nsWindow::CreateNative(GtkWidget *parentWidget)
                  GDK_BUTTON_PRESS_MASK |
                  GDK_BUTTON_RELEASE_MASK |
                  GDK_ENTER_NOTIFY_MASK |
+                 GDK_LEAVE_NOTIFY_MASK |
                  GDK_EXPOSURE_MASK |
                  GDK_FOCUS_CHANGE_MASK |
                  GDK_KEY_PRESS_MASK |
                  GDK_KEY_RELEASE_MASK |
-                 GDK_LEAVE_NOTIFY_MASK |
                  GDK_POINTER_MOTION_MASK);
 
 
-
   if (mBorderStyle == GTK_WINDOW_POPUP)
   {
     mShell = gtk_window_new(GTK_WINDOW_POPUP);
@@ -338,6 +337,12 @@ void nsWindow::InitCallbacks(char * aName)
   InstallEnterNotifySignal(mWidget);
   InstallLeaveNotifySignal(mWidget);
 
+  // Drag & Drop events.
+  InstallDragBeginSignal(mWidget);
+  InstallDragMotionSignal(mWidget);
+  InstallDragDropSignal(mWidget);
+
+
   gtk_signal_connect(GTK_OBJECT(mWidget),
                      "draw",
                      GTK_SIGNAL_FUNC(nsWindow::DrawSignal),