| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_GFX_SCREEN_H_ |
| #define UI_GFX_SCREEN_H_ |
| |
| #include <vector> |
| |
| #include "base/basictypes.h" |
| #include "ui/gfx/display.h" |
| #include "ui/gfx/geometry/point.h" |
| #include "ui/gfx/gfx_export.h" |
| #include "ui/gfx/native_widget_types.h" |
| #include "ui/gfx/screen_type_delegate.h" |
| |
| namespace gfx { |
| class DisplayObserver; |
| class Rect; |
| |
| // A utility class for getting various info about screen size, displays, |
| // cursor position, etc. |
| // |
| // Note that this class does not represent an individual display connected to a |
| // computer -- see the Display class for that. A single Screen object exists on |
| // most operating systems regardless of the number of connected displays. On |
| // Windows 8, two Screens exist: one for Metro UI and another for the desktop. |
| class GFX_EXPORT Screen { |
| public: |
| // Retrieves the Screen that the specified NativeView belongs to. A value of |
| // NULL is treated as |SCREEN_TYPE_NATIVE|. |
| static Screen* GetScreenFor(NativeView view); |
| |
| // Returns the SCREEN_TYPE_NATIVE Screen. This should be used with caution, |
| // as it is likely to be incorrect for code that runs on Windows. |
| static Screen* GetNativeScreen(); |
| |
| // Sets the global screen for a particular screen type. Only the _NATIVE |
| // ScreenType must be provided. |
| // NOTE: this does not take ownership of |screen|. Tests must be sure to |
| // reset any state they install. |
| static void SetScreenInstance(ScreenType type, Screen* instance); |
| |
| // Returns the global screen for a particular type. Types other than _NATIVE |
| // may be NULL. |
| static Screen* GetScreenByType(ScreenType type); |
| |
| // Sets the global ScreenTypeDelegate. May be left unset if the platform |
| // uses only the _NATIVE ScreenType. |
| // NOTE: this does not take ownership of |delegate|. Tests must be sure to |
| // reset any state they install. |
| static void SetScreenTypeDelegate(ScreenTypeDelegate* delegate); |
| |
| Screen(); |
| virtual ~Screen(); |
| |
| // Returns the current absolute position of the mouse pointer. |
| virtual gfx::Point GetCursorScreenPoint() = 0; |
| |
| // Returns the window under the cursor. |
| virtual gfx::NativeWindow GetWindowUnderCursor() = 0; |
| |
| // Returns the window at the given screen coordinate |point|. |
| virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) = 0; |
| |
| // Returns the number of displays. |
| // Mirrored displays are excluded; this method is intended to return the |
| // number of distinct, usable displays. |
| virtual int GetNumDisplays() const = 0; |
| |
| // Returns the list of displays that are currently available. |
| virtual std::vector<gfx::Display> GetAllDisplays() const = 0; |
| |
| // Returns the display nearest the specified window. |
| // If the window is NULL or the window is not rooted to a display this will |
| // return the primary display. |
| virtual gfx::Display GetDisplayNearestWindow(NativeView view) const = 0; |
| |
| // Returns the display nearest the specified point. |point| should be in DIPs. |
| virtual gfx::Display GetDisplayNearestPoint( |
| const gfx::Point& point) const = 0; |
| |
| // Returns the display that most closely intersects the provided bounds. |
| virtual gfx::Display GetDisplayMatching( |
| const gfx::Rect& match_rect) const = 0; |
| |
| // Returns the primary display. |
| virtual gfx::Display GetPrimaryDisplay() const = 0; |
| |
| // Adds/Removes display observers. |
| virtual void AddObserver(DisplayObserver* observer) = 0; |
| virtual void RemoveObserver(DisplayObserver* observer) = 0; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(Screen); |
| }; |
| |
| Screen* CreateNativeScreen(); |
| |
| } // namespace gfx |
| |
| #endif // UI_GFX_SCREEN_H_ |