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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_VIEWS_DRAG_UTILS_H_
      6 #define UI_VIEWS_DRAG_UTILS_H_
      7 
      8 #include "ui/base/dragdrop/drag_drop_types.h"
      9 #include "ui/gfx/native_widget_types.h"
     10 #include "ui/views/views_export.h"
     11 
     12 namespace gfx {
     13 class Canvas;
     14 class Point;
     15 class Size;
     16 }
     17 
     18 namespace ui {
     19 class OSExchangeData;
     20 }
     21 
     22 namespace views {
     23 class Widget;
     24 
     25 // Starts a drag operation. This blocks until the drag operation completes.
     26 VIEWS_EXPORT void RunShellDrag(gfx::NativeView view,
     27                                const ui::OSExchangeData& data,
     28                                const gfx::Point& location,
     29                                int operation,
     30                                ui::DragDropTypes::DragEventSource source);
     31 
     32 // Returns a canvas that can be used to draw the drag image. Caller owns the
     33 // returned object. |widget| is Widget hosting the view being dragged.
     34 VIEWS_EXPORT gfx::Canvas* GetCanvasForDragImage(Widget* widget,
     35                                                 const gfx::Size& canvas_size);
     36 
     37 }  // namespace views
     38 
     39 #endif  // UI_VIEWS_DRAG_UTILS_H_
     40