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50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
#include <cstdint>
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#include "Common/Input/InputState.h"
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#include "Common/Math/geom2d.h"
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// Mainly for detecting (multi-)touch gestures but also useable for left button mouse dragging etc.
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// Currently only supports simple scroll-drags with inertia.
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// TODO: Two-finger zoom/rotate etc.
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enum Gesture {
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GESTURE_DRAG_VERTICAL = 1,
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GESTURE_DRAG_HORIZONTAL = 2,
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GESTURE_TWO_FINGER_ZOOM = 4,
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GESTURE_TWO_FINGER_ZOOM_ROTATE = 8,
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};
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// May track multiple gestures at the same time. You simply call GetGestureInfo
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// with the gesture you are interested in.
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class GestureDetector {
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public:
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GestureDetector();
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TouchInput Update(const TouchInput &touch, const Bounds &bounds);
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void UpdateFrame();
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bool IsGestureActive(Gesture gesture, int touchId) const;
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bool GetGestureInfo(Gesture gesture, int touchId, float info[4]) const;
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private:
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enum Locals {
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MAX_PTRS = 10,
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};
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struct Pointer {
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bool down;
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double downTime;
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float lastX;
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float lastY;
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float downX;
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float downY;
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float deltaX;
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float deltaY;
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float distanceX;
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float distanceY;
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float estimatedInertiaX;
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float estimatedInertiaY;
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uint32_t active;
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};
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Pointer pointers[MAX_PTRS]{};
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};
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