ash/touch/touch_transformer_controller.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_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_
   6 #define ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/display/display_controller.h"
  10 #include "ui/gfx/transform.h"
  11
  12 namespace ash {
  13
  14 // TouchTransformerController listens to display configuration change
  15 // and updates the touch transformation for touch displays.
  16 class ASH_EXPORT TouchTransformerController
  17     : public DisplayController::Observer {
  18  public:
  19   TouchTransformerController();
  20   virtual ~TouchTransformerController();
  21
  22   // Updates the TouchTransformer for touch device and pushes the new
  23   // TouchTransformer into device manager.
  24   void UpdateTouchTransformer() const;
  25
  26   // DisplayController::Observer:
  27   virtual void OnDisplaysInitialized() OVERRIDE;
  28   virtual void OnDisplayConfigurationChanged() OVERRIDE;
  29
  30  private:
  31   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
  32                            TouchTransformerMirrorModeLetterboxing);
  33   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
  34                            TouchTransformerMirrorModePillarboxing);
  35   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
  36                            TouchTransformerExtendedMode);
  37   FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest,
  38                            TouchRadiusScale);
  39
  40   bool ShouldComputeMirrorModeTouchTransformer(
  41       const DisplayInfo& touch_display) const ;
  42
  43   gfx::Transform GetMirrorModeTouchTransformer(
  44       const DisplayInfo& touch_display) const;
  45
  46   gfx::Transform GetExtendedModeTouchTransformer(
  47       const DisplayInfo& touch_display, const gfx::Size& fb_size) const;
  48
  49   double GetTouchResolutionScale(const DisplayInfo& touch_display) const;
  50
  51   // For unittests only.
  52   bool force_compute_mirror_mode_touch_transformer_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(TouchTransformerController);
  55 };
  56
  57 }  // namespace ash
  58
  59 #endif  // ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_