| // Copyright 2014 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 ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_ |
| #define ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_ |
| |
| #include <stdint.h> |
| |
| #include "ash/ash_export.h" |
| #include "ash/display/window_tree_host_manager.h" |
| #include "base/gtest_prod_util.h" |
| #include "base/macros.h" |
| #include "ui/gfx/transform.h" |
| |
| namespace ui { |
| struct TouchscreenDevice; |
| } // namespace ui |
| |
| namespace ash { |
| |
| // TouchTransformerController listens to display configuration change |
| // and updates the touch transformation for touch displays. |
| class ASH_EXPORT TouchTransformerController |
| : public WindowTreeHostManager::Observer { |
| public: |
| TouchTransformerController(); |
| ~TouchTransformerController() override; |
| |
| // Updates the TouchTransformer for touch device and pushes the new |
| // TouchTransformer into device manager. |
| void UpdateTouchTransformer() const; |
| |
| // WindowTreeHostManager::Observer: |
| void OnDisplaysInitialized() override; |
| void OnDisplayConfigurationChanged() override; |
| |
| private: |
| FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, |
| MirrorModeLetterboxing); |
| FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, |
| MirrorModePillarboxing); |
| FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, SoftwareMirrorMode); |
| FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, ExtendedMode); |
| FRIEND_TEST_ALL_PREFIXES(TouchTransformerControllerTest, TouchRadiusScale); |
| |
| // Returns a transform that will be used to change an event's location from |
| // the touchscreen's coordinate system into |display|'s coordinate system. |
| // The transform is also responsible for properly scaling the display if the |
| // display supports panel fitting. |
| // |
| // On X11 events are reported in framebuffer coordinate space, so the |
| // |framebuffer_size| is used for scaling. |
| // On Ozone events are reported in the touchscreen's resolution, so |
| // |touch_display| is used to determine the size and scale the event. |
| gfx::Transform GetTouchTransform(const DisplayInfo& display, |
| const DisplayInfo& touch_display, |
| const ui::TouchscreenDevice& touchscreen, |
| const gfx::Size& framebuffer_size) const; |
| |
| // Returns the scaling factor for the touch radius such that it scales the |
| // radius from |touch_device|'s coordinate system to the |touch_display|'s |
| // coordinate system. |
| double GetTouchResolutionScale( |
| const DisplayInfo& touch_display, |
| const ui::TouchscreenDevice& touch_device) const; |
| |
| // For the provided |display| update the touch radius mapping. |
| void UpdateTouchRadius(const DisplayInfo& display) const; |
| |
| // For a given |target_display| and |target_display_id| update the touch |
| // transformation based on the touchscreen associated with |touch_display|. |
| // |target_display_id| is the display id whose root window will receive the |
| // touch events. |
| // |touch_display| is the physical display that has the touchscreen |
| // from which the events arrive. |
| // |target_display| provides the dimensions to which the touch event will be |
| // transformed. |
| void UpdateTouchTransform(int64_t target_display_id, |
| const DisplayInfo& touch_display, |
| const DisplayInfo& target_display) const; |
| |
| DISALLOW_COPY_AND_ASSIGN(TouchTransformerController); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_TOUCH_TOUCH_TRANSFORMER_CONTROLLER_H_ |