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| 1 /* | |
| 2 * Copyright 2011 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 #include "TransitionView.h" | |
| 8 | |
| 9 #include "OverView.h" | |
| 10 #include "SampleCode.h" | |
| 11 #include "SkView.h" | |
| 12 #include "SkCanvas.h" | |
| 13 #include "SkTime.h" | |
| 14 #include "SkInterpolator.h" | |
| 15 | |
| 16 static const char gIsTransitionQuery[] = "is-transition"; | |
| 17 static const char gReplaceTransitionEvt[] = "replace-transition-view"; | |
| 18 | |
| 19 bool is_transition(SkView* view) { | |
| 20 SkEvent isTransition(gIsTransitionQuery); | |
| 21 return view->doQuery(&isTransition); | |
| 22 } | |
| 23 | |
| 24 class TransitionView : public SampleView { | |
| 25 enum { | |
| 26 // kDurationMS = 500 | |
| 27 kDurationMS = 1 | |
| 28 }; | |
| 29 | |
| 30 public: | |
| 31 TransitionView(SkView* prev, SkView* next, int direction) : fInterp(4, 2){ | |
| 32 fAnimationDirection = (Direction)(1 << (direction % 8)); | |
| 33 | |
| 34 fPrev = prev; | |
| 35 fPrev->setClipToBounds(false); | |
| 36 fPrev->setVisibleP(true); | |
| 37 (void)SampleView::SetUsePipe(fPrev, SkOSMenu::kOffState); | |
| 38 //Not calling unref because fPrev is assumed to have been created, so | |
| 39 //this will result in a transfer of ownership | |
| 40 this->attachChildToBack(fPrev); | |
| 41 | |
| 42 fNext = next; | |
| 43 fNext->setClipToBounds(true); | |
| 44 fNext->setVisibleP(true); | |
| 45 (void)SampleView::SetUsePipe(fNext, SkOSMenu::kOffState); | |
| 46 //Calling unref because next is a newly created view and TransitionView | |
| 47 //is now the sole owner of fNext | |
| 48 this->attachChildToFront(fNext)->unref(); | |
| 49 | |
| 50 fDone = false; | |
| 51 //SkDebugf("--created transition\n"); | |
| 52 } | |
| 53 | |
| 54 ~TransitionView(){ | |
| 55 //SkDebugf("--deleted transition\n"); | |
| 56 } | |
| 57 | |
| 58 virtual void requestMenu(SkOSMenu* menu) { | |
| 59 if (SampleView::IsSampleView(fNext)) | |
| 60 ((SampleView*)fNext)->requestMenu(menu); | |
| 61 } | |
| 62 | |
| 63 protected: | |
| 64 virtual bool onQuery(SkEvent* evt) { | |
| 65 if (SampleCode::TitleQ(*evt)) { | |
| 66 SkString title; | |
| 67 if (SampleCode::RequestTitle(fNext, &title)) { | |
| 68 SampleCode::TitleR(evt, title.c_str()); | |
| 69 return true; | |
| 70 } | |
| 71 return false; | |
| 72 } | |
| 73 if (evt->isType(gIsTransitionQuery)) { | |
| 74 return true; | |
| 75 } | |
| 76 return this->INHERITED::onQuery(evt); | |
| 77 } | |
| 78 virtual bool onEvent(const SkEvent& evt) { | |
| 79 if (evt.isType(gReplaceTransitionEvt)) { | |
| 80 SkView* prev = fPrev; | |
| 81 prev->ref(); | |
| 82 | |
| 83 fPrev->detachFromParent(); | |
| 84 fPrev = (SkView*)SkEventSink::FindSink(evt.getFast32()); | |
| 85 (void)SampleView::SetUsePipe(fPrev, SkOSMenu::kOffState); | |
| 86 //attach the new fPrev and call unref to balance the ref in onDraw | |
| 87 this->attachChildToBack(fPrev)->unref(); | |
| 88 this->inval(NULL); | |
| 89 | |
| 90 SkASSERT(1 == prev->getRefCnt()); | |
| 91 prev->unref(); | |
| 92 return true; | |
| 93 } | |
| 94 if (evt.isType("transition-done")) { | |
| 95 fNext->setLoc(0, 0); | |
| 96 fNext->setClipToBounds(false); | |
| 97 SkEvent* evt = new SkEvent(gReplaceTransitionEvt, | |
| 98 this->getParent()->getSinkID()); | |
| 99 evt->setFast32(fNext->getSinkID()); | |
| 100 //increate ref count of fNext so it survives detachAllChildren | |
| 101 fNext->ref(); | |
| 102 this->detachAllChildren(); | |
| 103 evt->post(); | |
| 104 return true; | |
| 105 } | |
| 106 return this->INHERITED::onEvent(evt); | |
| 107 } | |
| 108 virtual void onDrawBackground(SkCanvas* canvas) {} | |
| 109 virtual void onDrawContent(SkCanvas* canvas) { | |
| 110 if (fDone) | |
| 111 return; | |
| 112 | |
| 113 if (is_overview(fNext) || is_overview(fPrev)) { | |
| 114 fPipeState = SkOSMenu::kOffState; | |
| 115 } | |
| 116 | |
| 117 SkScalar values[4]; | |
| 118 SkInterpolator::Result result = fInterp.timeToValues(SkTime::GetMSecs(),
values); | |
| 119 //SkDebugf("transition %x %d pipe:%d\n", this, result, fUsePipe); | |
| 120 //SkDebugf("%f %f %f %f %d\n", values[0], values[1], values[2], values[3
], result); | |
| 121 if (SkInterpolator::kNormal_Result == result) { | |
| 122 fPrev->setLocX(values[kPrevX]); | |
| 123 fPrev->setLocY(values[kPrevY]); | |
| 124 fNext->setLocX(values[kNextX]); | |
| 125 fNext->setLocY(values[kNextY]); | |
| 126 this->inval(NULL); | |
| 127 } | |
| 128 else { | |
| 129 (new SkEvent("transition-done", this->getSinkID()))->post(); | |
| 130 fDone = true; | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 virtual void onSizeChange() { | |
| 135 this->INHERITED::onSizeChange(); | |
| 136 | |
| 137 fNext->setSize(this->width(), this->height()); | |
| 138 fPrev->setSize(this->width(), this->height()); | |
| 139 | |
| 140 SkScalar lr = 0, ud = 0; | |
| 141 if (fAnimationDirection & (kLeftDirection|kULDirection|kDLDirection)) | |
| 142 lr = this->width(); | |
| 143 if (fAnimationDirection & (kRightDirection|kURDirection|kDRDirection)) | |
| 144 lr = -this->width(); | |
| 145 if (fAnimationDirection & (kUpDirection|kULDirection|kURDirection)) | |
| 146 ud = this->height(); | |
| 147 if (fAnimationDirection & (kDownDirection|kDLDirection|kDRDirection)) | |
| 148 ud = -this->height(); | |
| 149 | |
| 150 fBegin[kPrevX] = fBegin[kPrevY] = 0; | |
| 151 fBegin[kNextX] = lr; | |
| 152 fBegin[kNextY] = ud; | |
| 153 fNext->setLocX(lr); | |
| 154 fNext->setLocY(ud); | |
| 155 | |
| 156 if (is_transition(fPrev)) | |
| 157 lr = ud = 0; | |
| 158 fEnd[kPrevX] = -lr; | |
| 159 fEnd[kPrevY] = -ud; | |
| 160 fEnd[kNextX] = fEnd[kNextY] = 0; | |
| 161 SkScalar blend[] = { 0.8f, 0.0f, | |
| 162 0.0f, SK_Scalar1 }; | |
| 163 fInterp.setKeyFrame(0, SkTime::GetMSecs(), fBegin, blend); | |
| 164 fInterp.setKeyFrame(1, SkTime::GetMSecs()+kDurationMS, fEnd, blend); | |
| 165 } | |
| 166 | |
| 167 private: | |
| 168 enum { | |
| 169 kPrevX = 0, | |
| 170 kPrevY = 1, | |
| 171 kNextX = 2, | |
| 172 kNextY = 3 | |
| 173 }; | |
| 174 SkView* fPrev; | |
| 175 SkView* fNext; | |
| 176 bool fDone; | |
| 177 SkInterpolator fInterp; | |
| 178 | |
| 179 enum Direction{ | |
| 180 kUpDirection = 1, | |
| 181 kURDirection = 1 << 1, | |
| 182 kRightDirection = 1 << 2, | |
| 183 kDRDirection = 1 << 3, | |
| 184 kDownDirection = 1 << 4, | |
| 185 kDLDirection = 1 << 5, | |
| 186 kLeftDirection = 1 << 6, | |
| 187 kULDirection = 1 << 7 | |
| 188 }; | |
| 189 | |
| 190 Direction fAnimationDirection; | |
| 191 SkScalar fBegin[4]; | |
| 192 SkScalar fEnd[4]; | |
| 193 | |
| 194 typedef SampleView INHERITED; | |
| 195 }; | |
| 196 | |
| 197 SkView* create_transition(SkView* prev, SkView* next, int direction) { | |
| 198 #ifdef SK_BUILD_FOR_ANDROID | |
| 199 // Disable transitions for Android | |
| 200 return next; | |
| 201 #else | |
| 202 return SkNEW_ARGS(TransitionView, (prev, next, direction)); | |
| 203 #endif | |
| 204 } | |
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Chromium Code Reviews
Issue 850843002:
delete the dreaded TransitionView (Closed)
Base URL: https://skia.googlesource.com/skia.git@master