GainputPinchGesture.h

#ifndef GAINPUTPINCHGESTURE_H_
#define GAINPUTPINCHGESTURE_H_

#ifdef GAINPUT_ENABLE_PINCH_GESTURE

namespace gainput
{

enum PinchAction
{
    PinchTriggered,     
    PinchScale      
};


class GAINPUT_LIBEXPORT PinchGesture : public InputGesture
{
public:
    PinchGesture(InputManager& manager, DeviceId device, unsigned index, DeviceVariant variant);
    ~PinchGesture();


    void Initialize(DeviceId downDevice, DeviceButtonId downButton, 
            DeviceId xAxisDevice, DeviceButtonId xAxis, 
            DeviceId yAxisDevice, DeviceButtonId yAxis, 
            DeviceId down2Device, DeviceButtonId downButton2, 
            DeviceId xAxis2Device, DeviceButtonId xAxis2, 
            DeviceId yAxis2Device, DeviceButtonId yAxis2);

    bool IsValidButtonId(DeviceButtonId deviceButton) const { return deviceButton == PinchTriggered || deviceButton == PinchScale; }

    ButtonType GetButtonType(DeviceButtonId deviceButton) const { GAINPUT_ASSERT(IsValidButtonId(deviceButton)); return deviceButton == PinchTriggered ? BT_BOOL : BT_FLOAT; }

protected:
    void InternalUpdate(InputDeltaState* delta);

private:
    DeviceButtonSpec downButton_;
    DeviceButtonSpec xAxis_;
    DeviceButtonSpec yAxis_;
    DeviceButtonSpec downButton2_;
    DeviceButtonSpec xAxis2_;
    DeviceButtonSpec yAxis2_;

    bool pinching_;
    float initialDistance_;
};

}

#endif

#endif