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69 lines
2.0 KiB
69 lines
2.0 KiB
4 months ago
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#ifndef ANDROID_DVR_VIRTUAL_TOUCHPAD_EVDEV_H
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#define ANDROID_DVR_VIRTUAL_TOUCHPAD_EVDEV_H
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#include "EvdevInjector.h"
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#include "VirtualTouchpad.h"
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namespace android {
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namespace dvr {
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class EvdevInjector;
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// VirtualTouchpadEvdev implements a VirtualTouchpad by injecting evdev events.
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//
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class VirtualTouchpadEvdev : public VirtualTouchpad {
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public:
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static std::unique_ptr<VirtualTouchpad> Create();
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~VirtualTouchpadEvdev() override {}
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// VirtualTouchpad implementation:
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status_t Attach() override;
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status_t Detach() override;
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status_t Touch(int touchpad, float x, float y, float pressure) override;
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status_t ButtonState(int touchpad, int buttons) override;
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status_t Scroll(int touchpad, float x, float y) override;
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void dumpInternal(String8& result) override;
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protected:
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static constexpr int kTouchpads = 2;
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VirtualTouchpadEvdev() {}
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void Reset();
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// Must be called only between construction (or Detach()) and Attach().
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inline void SetEvdevInjectorForTesting(int touchpad,
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EvdevInjector* injector) {
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touchpad_[touchpad].injector = injector;
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}
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private:
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// Per-touchpad state.
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struct Touchpad {
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// Except for testing, the |EvdevInjector| used to inject evdev events.
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std::unique_ptr<EvdevInjector> owned_injector;
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// Active pointer to |owned_injector_| or to a testing injector.
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EvdevInjector* injector = nullptr;
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// Previous (x, y) position in device space, to suppress redundant events.
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int32_t last_device_x;
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int32_t last_device_y;
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// Records current touch state (0=up 1=down) in bit 0, and previous state
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// in bit 1, to track transitions.
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int touches;
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// Previous injected button state, to detect changes.
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int32_t last_motion_event_buttons;
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};
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Touchpad touchpad_[kTouchpads];
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VirtualTouchpadEvdev(const VirtualTouchpadEvdev&) = delete;
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void operator=(const VirtualTouchpadEvdev&) = delete;
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};
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} // namespace dvr
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} // namespace android
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#endif // ANDROID_DVR_VIRTUAL_TOUCHPAD_EVDEV_H
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