ash/display/screen_ash.h

   1 // Copyright 2014 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 ASH_DISPLAY_SCREEN_ASH_H_
   6 #define ASH_DISPLAY_SCREEN_ASH_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/observer_list.h"
  11 #include "ui/gfx/screen.h"
  12
  13 namespace gfx {
  14 class Rect;
  15 }
  16
  17 namespace ash {
  18 namespace  internal {
  19 class DisplayManager;
  20 }
  21
  22 // Aura implementation of gfx::Screen. Implemented here to avoid circular
  23 // dependencies.
  24 class ASH_EXPORT ScreenAsh : public gfx::Screen {
  25  public:
  26   ScreenAsh();
  27   virtual ~ScreenAsh();
  28
  29   // Finds the display that contains |point| in screeen coordinates.
  30   // Returns invalid display if there is no display that can satisfy
  31   // the condition.
  32   static gfx::Display FindDisplayContainingPoint(const gfx::Point& point);
  33
  34   // Returns the bounds for maximized windows in parent coordinates.
  35   // Maximized windows trigger auto-hiding the shelf.
  36   static gfx::Rect GetMaximizedWindowBoundsInParent(aura::Window* window);
  37
  38   // Returns the display bounds in parent coordinates.
  39   static gfx::Rect GetDisplayBoundsInParent(aura::Window* window);
  40
  41   // Returns the display's work area bounds in parent coordinates.
  42   static gfx::Rect GetDisplayWorkAreaBoundsInParent(aura::Window* window);
  43
  44   // Converts |rect| from |window|'s coordinates to the virtual screen
  45   // coordinates.
  46   static gfx::Rect ConvertRectToScreen(aura::Window* window,
  47                                        const gfx::Rect& rect);
  48
  49   // Converts |rect| from virtual screen coordinates to the |window|'s
  50   // coordinates.
  51   static gfx::Rect ConvertRectFromScreen(aura::Window* window,
  52                                          const gfx::Rect& rect);
  53
  54   // Returns a gfx::Display object for secondary display. Returns
  55   // invalid display if there is no secondary display connected.
  56   static const gfx::Display& GetSecondaryDisplay();
  57
  58   // Returns a gfx::Display object for the specified id.  Returns
  59   // invalid display if no such display is connected.
  60   static const gfx::Display& GetDisplayForId(int64 display_id);
  61
  62   // gfx::Screen overrides:
  63   virtual bool IsDIPEnabled() OVERRIDE;
  64   virtual gfx::Point GetCursorScreenPoint() OVERRIDE;
  65   virtual gfx::NativeWindow GetWindowUnderCursor() OVERRIDE;
  66   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
  67       OVERRIDE;
  68   virtual int GetNumDisplays() const OVERRIDE;
  69   virtual std::vector<gfx::Display> GetAllDisplays() const OVERRIDE;
  70   virtual gfx::Display GetDisplayNearestWindow(
  71       gfx::NativeView view) const OVERRIDE;
  72   virtual gfx::Display GetDisplayNearestPoint(
  73       const gfx::Point& point) const OVERRIDE;
  74   virtual gfx::Display GetDisplayMatching(
  75       const gfx::Rect& match_rect) const OVERRIDE;
  76   virtual gfx::Display GetPrimaryDisplay() const OVERRIDE;
  77   virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE;
  78   virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE;
  79
  80  private:
  81   friend class DisplayManager;
  82
  83   // Notifies observers of display configuration changes.
  84   void NotifyBoundsChanged(const gfx::Display& display);
  85   void NotifyDisplayAdded(const gfx::Display& display);
  86   void NotifyDisplayRemoved(const gfx::Display& display);
  87
  88   // Creates a screen that can be used during shutdown.
  89   // It simply has a copy of the displays.
  90   gfx::Screen* CloneForShutdown();
  91
  92   ObserverList<gfx::DisplayObserver> observers_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(ScreenAsh);
  95 };
  96
  97 }  // namespace ash
  98
  99 #endif  // ASH_DISPLAY_SCREEN_ASH_H_