Downward drag after mouse-down is now causing bookmark bar folders to open, r...

views/view.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "views/view.h"
 
 #include <algorithm>
 #ifndef NDEBUG
 #include <iostream>
 #endif
@@ skipping 469 matching lines @@
   return !!context_menu_controller || result;
 }
 
 bool View::ProcessMouseDragged(const MouseEvent& e, DragInfo* drag_info) {
   // Copy the field, that way if we're deleted after drag and drop no harm is
   // done.
   ContextMenuController* context_menu_controller = context_menu_controller_;
   const bool possible_drag = drag_info->possible_drag;
   if (possible_drag && ExceededDragThreshold(drag_info->start_x - e.x(),
                                              drag_info->start_y - e.y())) {
-    DoDrag(e, drag_info->start_x, drag_info->start_y);
+    if (!drag_controller_ ||
+        drag_controller_->CanStartDrag(this,
+                                       drag_info->start_x,
+                                       drag_info->start_y,
+                                       e.x(),
+                                       e.y()))
+      DoDrag(e, drag_info->start_x, drag_info->start_y);
   } else {
     if (OnMouseDragged(e))
       return true;
     // Fall through to return value based on context menu controller.
   }
   // WARNING: we may have been deleted.
   return (context_menu_controller != NULL) || possible_drag;
 }
 
 void View::ProcessMouseReleased(const MouseEvent& e, bool canceled) {
@@ skipping 907 matching lines @@
   start_x = start_y = 0;
 }
 
 void View::DragInfo::PossibleDrag(int x, int y) {
   possible_drag = true;
   start_x = x;
   start_y = y;
 }
 
 }  // namespace