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comparison: gfx/skia/trunk/include/views/SkTouchGesture.h
gfx/skia/trunk/include/views/SkTouchGesture.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:326c3eecff0f |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 #ifndef SkTouchGesture_DEFINED | |
| 9 #define SkTouchGesture_DEFINED | |
| 10 | |
| 11 #include "SkTDArray.h" | |
| 12 #include "SkMatrix.h" | |
| 13 | |
| 14 struct SkFlingState { | |
| 15 SkFlingState() : fActive(false) {} | |
| 16 | |
| 17 bool isActive() const { return fActive; } | |
| 18 void stop() { fActive = false; } | |
| 19 | |
| 20 void reset(float sx, float sy); | |
| 21 bool evaluateMatrix(SkMatrix* matrix); | |
| 22 | |
| 23 private: | |
| 24 SkPoint fDirection; | |
| 25 SkScalar fSpeed0; | |
| 26 double fTime0; | |
| 27 bool fActive; | |
| 28 }; | |
| 29 | |
| 30 class SkTouchGesture { | |
| 31 public: | |
| 32 SkTouchGesture(); | |
| 33 ~SkTouchGesture(); | |
| 34 | |
| 35 void touchBegin(void* owner, float x, float y); | |
| 36 void touchMoved(void* owner, float x, float y); | |
| 37 void touchEnd(void* owner); | |
| 38 void reset(); | |
| 39 | |
| 40 bool isActive() { return fFlinger.isActive(); } | |
| 41 void stop() { fFlinger.stop(); } | |
| 42 | |
| 43 const SkMatrix& localM(); | |
| 44 const SkMatrix& globalM() const { return fGlobalM; } | |
| 45 | |
| 46 private: | |
| 47 enum State { | |
| 48 kEmpty_State, | |
| 49 kTranslate_State, | |
| 50 kZoom_State, | |
| 51 }; | |
| 52 | |
| 53 struct Rec { | |
| 54 void* fOwner; | |
| 55 float fStartX, fStartY; | |
| 56 float fPrevX, fPrevY; | |
| 57 float fLastX, fLastY; | |
| 58 SkMSec fPrevT, fLastT; | |
| 59 }; | |
| 60 SkTDArray<Rec> fTouches; | |
| 61 | |
| 62 State fState; | |
| 63 SkMatrix fLocalM, fGlobalM; | |
| 64 SkFlingState fFlinger; | |
| 65 SkMSec fLastUpT; | |
| 66 SkPoint fLastUpP; | |
| 67 | |
| 68 | |
| 69 void flushLocalM(); | |
| 70 int findRec(void* owner) const; | |
| 71 void appendNewRec(void* owner, float x, float y); | |
| 72 float computePinch(const Rec&, const Rec&); | |
| 73 float limitTotalZoom(float scale) const; | |
| 74 bool handleDblTap(float, float); | |
| 75 }; | |
| 76 | |
| 77 #endif |
