Multiple DPI Tracking for ScreenWin

ui/display/win/screen_win.h

 // 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_DISPLAY_WIN_SCREEN_WIN_H_
 #define UI_DISPLAY_WIN_SCREEN_WIN_H_
 
 #include <windows.h>
 
 #include <memory>
@@ skipping 93 matching lines @@
   std::vector<display::Display> GetAllDisplays() const override;
   display::Display GetDisplayNearestWindow(
       gfx::NativeView window) const override;
   display::Display GetDisplayNearestPoint(
       const gfx::Point& point) const override;
   display::Display GetDisplayMatching(
       const gfx::Rect& match_rect) const override;
   display::Display GetPrimaryDisplay() const override;
   void AddObserver(display::DisplayObserver* observer) override;
   void RemoveObserver(display::DisplayObserver* observer) override;
+  gfx::Rect ScreenToDIPRectInWindow(
+      gfx::NativeView view, const gfx::Rect& screen_rect) const override;
+  gfx::Rect DIPToScreenRectInWindow(
+      gfx::NativeView view, const gfx::Rect& dip_rect) const override;
 
   void UpdateFromDisplayInfos(const std::vector<DisplayInfo>& display_infos);
 
   // Virtual to support mocking by unit tests.
   virtual void Initialize();
   virtual MONITORINFOEX MonitorInfoFromScreenPoint(
       const gfx::Point& screen_point) const;
   virtual MONITORINFOEX MonitorInfoFromScreenRect(const gfx::Rect& screen_rect)
       const;
   virtual MONITORINFOEX MonitorInfoFromWindow(HWND hwnd, DWORD default_options)
       const;
   virtual HWND GetRootWindow(HWND hwnd) const;
 
  private:
   void OnWndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
 
   // Returns the ScreenWinDisplay closest to or enclosing |hwnd|.
   ScreenWinDisplay GetScreenWinDisplayNearestHWND(HWND hwnd) const;
 
   // Returns the ScreenWinDisplay closest to or enclosing |screen_rect|.
   ScreenWinDisplay GetScreenWinDisplayNearestScreenRect(
       const gfx::Rect& screen_rect) const;
 
   // Returns the ScreenWinDisplay closest to or enclosing |screen_point|.
   ScreenWinDisplay GetScreenWinDisplayNearestScreenPoint(
       const gfx::Point& screen_point) const;
 
+  // Returns the ScreenWinDisplay closest to or enclosing |dip_point|.
+  ScreenWinDisplay GetScreenWinDisplayNearestDIPPoint(
+      const gfx::Point& dip_point) const;
+
+  // Returns the ScreenWinDisplay closest to or enclosing |dip_rect|.
+  ScreenWinDisplay GetScreenWinDisplayNearestDIPRect(
+      const gfx::Rect& dip_rect) const;
+
   // Returns the ScreenWinDisplay corresponding to the primary monitor.
   ScreenWinDisplay GetPrimaryScreenWinDisplay() const;
 
   ScreenWinDisplay GetScreenWinDisplay(const MONITORINFOEX& monitor_info) const;
 
+  static float GetScaleFactorForHWND(HWND hwnd);
+
+  // Returns the result of calling |getter| with |value| on the global
+  // ScreenWin if it exists, otherwise return the default ScreenWinDisplay.
+  template <typename Getter, typename GetterType>
+  static ScreenWinDisplay GetScreenWinDisplayVia(Getter getter,
+                                                 GetterType value);
+
   // Helper implementing the DisplayObserver handling.
   DisplayChangeNotifier change_notifier_;
 
   std::unique_ptr<gfx::SingletonHwndObserver> singleton_hwnd_observer_;
 
   // Current list of ScreenWinDisplays.
   std::vector<ScreenWinDisplay> screen_win_displays_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenWin);
 };
 
 }  // namespace win
 }  // namespace display
 
 #endif  // UI_DISPLAY_WIN_SCREEN_WIN_H_