57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
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#ifndef GrTouchGesture_DEFINED
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#define GrTouchGesture_DEFINED
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#include "GrTypes.h"
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#include "SkTDArray.h"
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#include "SkMatrix.h"
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#include "FlingState.h"
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class GrTouchGesture {
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public:
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GrTouchGesture();
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~GrTouchGesture();
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void touchBegin(void* owner, float x, float y);
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void touchMoved(void* owner, float x, float y);
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void touchEnd(void* owner);
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void reset();
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const SkMatrix& localM();
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const SkMatrix& globalM() const { return fGlobalM; }
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private:
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enum State {
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kEmpty_State,
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kTranslate_State,
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kZoom_State,
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};
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struct Rec {
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void* fOwner;
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float fStartX, fStartY;
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float fPrevX, fPrevY;
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float fLastX, fLastY;
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SkMSec fPrevT, fLastT;
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};
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SkTDArray<Rec> fTouches;
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State fState;
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SkMatrix fLocalM, fGlobalM;
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FlingState fFlinger;
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SkMSec fLastUpT;
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SkPoint fLastUpP;
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void flushLocalM();
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int findRec(void* owner) const;
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void appendNewRec(void* owner, float x, float y);
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float computePinch(const Rec&, const Rec&);
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float limitTotalZoom(float scale) const;
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bool handleDblTap(float, float);
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};
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#endif
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