1 #ifndef ANDROID_DVR_VIRTUAL_TOUCHPAD_INTERFACE_H 2 #define ANDROID_DVR_VIRTUAL_TOUCHPAD_INTERFACE_H 3 4 #include "dvr/virtual_touchpad_client.h" 5 6 #include <memory> 7 #include <utils/Errors.h> 8 #include <utils/String8.h> 9 10 namespace android { 11 namespace dvr { 12 13 // Provides a virtual touchpad for injecting events into the input system. 14 // 15 class VirtualTouchpad { 16 public: 17 enum : int { 18 PRIMARY = DVR_VIRTUAL_TOUCHPAD_PRIMARY, 19 VIRTUAL = DVR_VIRTUAL_TOUCHPAD_VIRTUAL, 20 }; 21 22 virtual ~VirtualTouchpad() {} 23 24 // Create a virtual touchpad. 25 // Implementations should provide this, and hide their constructors. 26 // For the user, switching implementations should be as simple as changing 27 // the class whose |Create()| is called. 28 // Implementations should be minimial; major resource allocation should 29 // be performed in Attach(). 30 static std::unique_ptr<VirtualTouchpad> Create() { 31 return nullptr; 32 } 33 34 // Initialize a virtual touchpad. 35 virtual status_t Attach() = 0; 36 37 // Shut down a virtual touchpad. 38 virtual status_t Detach() = 0; 39 40 // Generate a simulated touch event. 41 // 42 // @param touchpad Touchpad selector index. 43 // @param x Horizontal touch position. 44 // @param y Vertical touch position. 45 // Values must be in the range [0.0, 1.0). 46 // @param pressure Touch pressure. 47 // Positive values represent contact; use 1.0f if contact 48 // is binary. Use 0.0f for no contact. 49 // @returns OK on success. 50 // 51 virtual status_t Touch(int touchpad, float x, float y, float pressure) = 0; 52 53 // Generate a simulated touchpad button state. 54 // 55 // @param touchpad Touchpad selector index. 56 // @param buttons A union of MotionEvent BUTTON_* values. 57 // @returns OK on success. 58 // 59 // Currently only BUTTON_BACK is supported, as the implementation 60 // restricts itself to operations actually required by VrWindowManager. 61 // 62 virtual status_t ButtonState(int touchpad, int buttons) = 0; 63 64 // Generate a simulated scroll event. 65 // 66 // @param touchpad Touchpad selector index. 67 // @param x Horizontal scroll increment. 68 // @param y Vertical scroll increment. 69 // Values must be in the range [-1.0, 1.0]. 70 // @returns OK on success. 71 // 72 virtual status_t Scroll(int touchpad, float x, float y) = 0; 73 74 // Report state for 'dumpsys'. 75 virtual void dumpInternal(String8& result) = 0; 76 77 protected: 78 VirtualTouchpad() {} 79 80 private: 81 VirtualTouchpad(const VirtualTouchpad&) = delete; 82 void operator=(const VirtualTouchpad&) = delete; 83 }; 84 85 } // namespace dvr 86 } // namespace android 87 88 #endif // ANDROID_DVR_VIRTUAL_TOUCHPAD_INTERFACE_H 89
