ui/gfx/screen_android.cc

   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 #include "ui/gfx/screen.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/gfx/android/device_display_info.h"
   9 #include "ui/gfx/display.h"
  10 #include "ui/gfx/size_conversions.h"
  11
  12 namespace gfx {
  13
  14 class ScreenAndroid : public Screen {
  15  public:
  16   ScreenAndroid() {}
  17
  18   bool IsDIPEnabled() OVERRIDE {
  19     return true;
  20   }
  21
  22   gfx::Point GetCursorScreenPoint() OVERRIDE {
  23     return gfx::Point();
  24   }
  25
  26   gfx::NativeWindow GetWindowAtCursorScreenPoint() OVERRIDE {
  27     NOTIMPLEMENTED();
  28     return NULL;
  29   }
  30
  31   gfx::Display GetPrimaryDisplay() const OVERRIDE {
  32     gfx::DeviceDisplayInfo device_info;
  33     const float device_scale_factor = device_info.GetDIPScale();
  34     const gfx::Rect bounds_in_pixels =
  35         gfx::Rect(
  36             device_info.GetDisplayWidth(),
  37             device_info.GetDisplayHeight());
  38     const gfx::Rect bounds_in_dip =
  39         gfx::Rect(gfx::ToCeiledSize(gfx::ScaleSize(
  40             bounds_in_pixels.size(), 1.0f / device_scale_factor)));
  41     gfx::Display display(0, bounds_in_dip);
  42     display.set_device_scale_factor(device_scale_factor);
  43     return display;
  44   }
  45
  46   gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const OVERRIDE {
  47     return GetPrimaryDisplay();
  48   }
  49
  50   gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const OVERRIDE {
  51     return GetPrimaryDisplay();
  52   }
  53
  54   int GetNumDisplays() OVERRIDE {
  55     return 1;
  56   }
  57
  58   virtual gfx::Display GetDisplayMatching(
  59       const gfx::Rect& match_rect) const OVERRIDE {
  60     return GetPrimaryDisplay();
  61   }
  62
  63   virtual void AddObserver(DisplayObserver* observer) OVERRIDE {
  64     // no display change on Android.
  65   }
  66
  67   virtual void RemoveObserver(DisplayObserver* observer) OVERRIDE {
  68     // no display change on Android.
  69   }
  70
  71  private:
  72   DISALLOW_COPY_AND_ASSIGN(ScreenAndroid);
  73 };
  74
  75 Screen* CreateNativeScreen() {
  76   return new ScreenAndroid;
  77 }
  78
  79 }  // namespace gfx