ui/aura/client/screen_position_client.h

   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_SCREEN_POSITION_CLIENT_H_
   6 #define UI_AURA_SCREEN_POSITION_CLIENT_H_
   7
   8 #include "ui/aura/aura_export.h"
   9 #include "ui/aura/window.h"
  10
  11 namespace gfx {
  12 class Display;
  13 class Rect;
  14 }
  15
  16 namespace aura {
  17 class Window;
  18 namespace client {
  19
  20 // An interface implemented by an object that changes coordinates within a root
  21 // Window into system coordinates.
  22 class AURA_EXPORT ScreenPositionClient {
  23  public:
  24   virtual ~ScreenPositionClient() {}
  25
  26   // Converts the |screen_point| from a given |window|'s coordinate space
  27   // into screen coordinate space.
  28   virtual void ConvertPointToScreen(const Window* window,
  29                                     gfx::Point* point) = 0;
  30   virtual void ConvertPointFromScreen(const Window* window,
  31                                       gfx::Point* point) = 0;
  32   // Converts the |screen_point| from root window host's coordinate of
  33   // into screen coordinate space.
  34   // A typical example of using this function instead of ConvertPointToScreen is
  35   // when X's native input is captured by a drag operation.
  36   // See the comments for ash::GetRootWindowRelativeToWindow for details.
  37   virtual void ConvertHostPointToScreen(Window* root_window,
  38                                         gfx::Point* point) = 0;
  39   // Sets the bounds of the window. The implementation is responsible
  40   // for finding out and translating the right coordinates for the |window|.
  41   virtual void SetBounds(Window* window,
  42                          const gfx::Rect& bounds,
  43                          const gfx::Display& display) = 0;
  44 };
  45
  46 // Sets/Gets the activation client on the Window.
  47 AURA_EXPORT void SetScreenPositionClient(Window* root_window,
  48                                          ScreenPositionClient* client);
  49 AURA_EXPORT ScreenPositionClient* GetScreenPositionClient(
  50     const Window* root_window);
  51
  52 }  // namespace clients
  53 }  // namespace aura
  54
  55 #endif  // UI_AURA_SCREEN_POSITION_CLIENT_H_