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