ui/gfx/screen_win.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_GFX_SCREEN_WIN_H_
   6 #define UI_GFX_SCREEN_WIN_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "ui/gfx/display_change_notifier.h"
  10 #include "ui/gfx/gfx_export.h"
  11 #include "ui/gfx/screen.h"
  12 #include "ui/gfx/win/singleton_hwnd.h"
  13
  14 namespace gfx {
  15
  16 class GFX_EXPORT ScreenWin : public Screen,
  17                              public SingletonHwnd::Observer {
  18  public:
  19   ScreenWin();
  20   virtual ~ScreenWin();
  21
  22  protected:
  23   // Overridden from gfx::Screen:
  24   virtual gfx::Point GetCursorScreenPoint() override;
  25   virtual gfx::NativeWindow GetWindowUnderCursor() override;
  26   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
  27       override;
  28   virtual int GetNumDisplays() const override;
  29   virtual std::vector<gfx::Display> GetAllDisplays() const override;
  30   virtual gfx::Display GetDisplayNearestWindow(
  31       gfx::NativeView window) const override;
  32   virtual gfx::Display GetDisplayNearestPoint(
  33       const gfx::Point& point) const override;
  34   virtual gfx::Display GetDisplayMatching(
  35       const gfx::Rect& match_rect) const override;
  36   virtual gfx::Display GetPrimaryDisplay() const override;
  37   virtual void AddObserver(DisplayObserver* observer) override;
  38   virtual void RemoveObserver(DisplayObserver* observer) override;
  39
  40   // Overriden from gfx::SingletonHwnd::Observer.
  41   virtual void OnWndProc(HWND hwnd,
  42                          UINT message,
  43                          WPARAM wparam,
  44                          LPARAM lparam) override;
  45
  46   // Returns the HWND associated with the NativeView.
  47   virtual HWND GetHWNDFromNativeView(NativeView window) const;
  48
  49   // Returns the NativeView associated with the HWND.
  50   virtual NativeWindow GetNativeWindowFromHWND(HWND hwnd) const;
  51
  52  private:
  53   // Helper implementing the DisplayObserver handling.
  54   gfx::DisplayChangeNotifier change_notifier_;
  55
  56   // Current list of displays.
  57   std::vector<gfx::Display> displays_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(ScreenWin);
  60 };
  61
  62 }  // namespace gfx
  63
  64 #endif  // UI_GFX_SCREEN_WIN_H_