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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_AURA_CLIENT_WINDOW_MOVE_CLIENT_H_
      6 #define UI_AURA_CLIENT_WINDOW_MOVE_CLIENT_H_
      7 
      8 #include "ui/aura/aura_export.h"
      9 #include "ui/gfx/vector2d.h"
     10 
     11 namespace gfx {
     12 class Point;
     13 }
     14 
     15 namespace aura {
     16 class Window;
     17 namespace client {
     18 
     19 enum WindowMoveResult {
     20   MOVE_SUCCESSFUL,  // Moving window was successful.
     21   MOVE_CANCELED    // Moving window was canceled.
     22 };
     23 
     24 enum WindowMoveSource {
     25   WINDOW_MOVE_SOURCE_MOUSE,
     26   WINDOW_MOVE_SOURCE_TOUCH,
     27 };
     28 
     29 // An interface implemented by an object that manages programatically keyed
     30 // window moving.
     31 class AURA_EXPORT WindowMoveClient {
     32  public:
     33   // Starts a nested message loop for moving the window. |drag_offset| is the
     34   // offset from the window origin to the cursor when the drag was started.
     35   // Returns MOVE_SUCCESSFUL if the move has completed successfully, or
     36   // MOVE_CANCELED otherwise.
     37   virtual WindowMoveResult RunMoveLoop(Window* window,
     38                                        const gfx::Vector2d& drag_offset,
     39                                        WindowMoveSource source) = 0;
     40 
     41   // Ends a previously started move loop.
     42   virtual void EndMoveLoop() = 0;
     43 
     44  protected:
     45   virtual ~WindowMoveClient() {}
     46 };
     47 
     48 // Sets/Gets the activation client for the specified window.
     49 AURA_EXPORT void SetWindowMoveClient(Window* window,
     50                                      WindowMoveClient* client);
     51 AURA_EXPORT WindowMoveClient* GetWindowMoveClient(Window* window);
     52 
     53 }  // namespace client
     54 }  // namespace aura
     55 
     56 #endif  // UI_AURA_CLIENT_WINDOW_MOVE_CLIENT_H_
     57