delete the dreaded TransitionView

samplecode/TransitionView.cpp

Index: samplecode/TransitionView.cpp
diff --git a/samplecode/TransitionView.cpp b/samplecode/TransitionView.cpp
deleted file mode 100644
index 3a3717251637e23c66f28baac6cfc574bb1de1e3..0000000000000000000000000000000000000000
--- a/samplecode/TransitionView.cpp
+++ /dev/null
@@ -1,204 +0,0 @@
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include "TransitionView.h"
-
-#include "OverView.h"
-#include "SampleCode.h"
-#include "SkView.h"
-#include "SkCanvas.h"
-#include "SkTime.h"
-#include "SkInterpolator.h"
-
-static const char gIsTransitionQuery[] = "is-transition";
-static const char gReplaceTransitionEvt[] = "replace-transition-view";
-
-bool is_transition(SkView* view) {
-    SkEvent isTransition(gIsTransitionQuery);
-    return view->doQuery(&isTransition);
-}
-
-class TransitionView : public SampleView {
-    enum {
-        // kDurationMS = 500
-        kDurationMS = 1
-    };
-
-public:
-    TransitionView(SkView* prev, SkView* next, int direction) : fInterp(4, 2){
-        fAnimationDirection = (Direction)(1 << (direction % 8));
-
-        fPrev = prev;
-        fPrev->setClipToBounds(false);
-        fPrev->setVisibleP(true);
-        (void)SampleView::SetUsePipe(fPrev, SkOSMenu::kOffState);
-        //Not calling unref because fPrev is assumed to have been created, so
-        //this will result in a transfer of ownership
-        this->attachChildToBack(fPrev);
-
-        fNext = next;
-        fNext->setClipToBounds(true);
-        fNext->setVisibleP(true);
-        (void)SampleView::SetUsePipe(fNext, SkOSMenu::kOffState);
-        //Calling unref because next is a newly created view and TransitionView
-        //is now the sole owner of fNext
-        this->attachChildToFront(fNext)->unref();
-
-        fDone = false;
-        //SkDebugf("--created transition\n");
-    }
-
-    ~TransitionView(){
-        //SkDebugf("--deleted transition\n");
-    }
-
-    virtual void requestMenu(SkOSMenu* menu) {
-        if (SampleView::IsSampleView(fNext))
-            ((SampleView*)fNext)->requestMenu(menu);
-    }
-
-protected:
-    virtual bool onQuery(SkEvent* evt) {
-        if (SampleCode::TitleQ(*evt)) {
-            SkString title;
-            if (SampleCode::RequestTitle(fNext, &title)) {
-                SampleCode::TitleR(evt, title.c_str());
-                return true;
-            }
-            return false;
-        }
-        if (evt->isType(gIsTransitionQuery)) {
-            return true;
-        }
-        return this->INHERITED::onQuery(evt);
-    }
-    virtual bool onEvent(const SkEvent& evt) {
-        if (evt.isType(gReplaceTransitionEvt)) {
-            SkView* prev = fPrev;
-            prev->ref();
-
-            fPrev->detachFromParent();
-            fPrev = (SkView*)SkEventSink::FindSink(evt.getFast32());
-            (void)SampleView::SetUsePipe(fPrev, SkOSMenu::kOffState);
-            //attach the new fPrev and call unref to balance the ref in onDraw
-            this->attachChildToBack(fPrev)->unref();
-            this->inval(NULL);
-
-            SkASSERT(1 == prev->getRefCnt());
-            prev->unref();
-            return true;
-        }
-        if (evt.isType("transition-done")) {
-            fNext->setLoc(0, 0);
-            fNext->setClipToBounds(false);
-            SkEvent* evt = new SkEvent(gReplaceTransitionEvt,
-                                       this->getParent()->getSinkID());
-            evt->setFast32(fNext->getSinkID());
-            //increate ref count of fNext so it survives detachAllChildren
-            fNext->ref();
-            this->detachAllChildren();
-            evt->post();
-            return true;
-        }
-        return this->INHERITED::onEvent(evt);
-    }
-    virtual void onDrawBackground(SkCanvas* canvas) {}
-    virtual void onDrawContent(SkCanvas* canvas) {
-        if (fDone)
-            return;
-
-        if (is_overview(fNext) || is_overview(fPrev)) {
-            fPipeState = SkOSMenu::kOffState;
-        }
-
-        SkScalar values[4];
-        SkInterpolator::Result result = fInterp.timeToValues(SkTime::GetMSecs(), values);
-        //SkDebugf("transition %x %d pipe:%d\n", this, result, fUsePipe);
-        //SkDebugf("%f %f %f %f %d\n", values[0], values[1], values[2], values[3], result);
-        if (SkInterpolator::kNormal_Result == result) {
-            fPrev->setLocX(values[kPrevX]);
-            fPrev->setLocY(values[kPrevY]);
-            fNext->setLocX(values[kNextX]);
-            fNext->setLocY(values[kNextY]);
-            this->inval(NULL);
-        }
-        else {
-            (new SkEvent("transition-done", this->getSinkID()))->post();
-            fDone = true;
-        }
-    }
-
-    virtual void onSizeChange() {
-        this->INHERITED::onSizeChange();
-
-        fNext->setSize(this->width(), this->height());
-        fPrev->setSize(this->width(), this->height());
-
-        SkScalar lr = 0, ud = 0;
-        if (fAnimationDirection & (kLeftDirection|kULDirection|kDLDirection))
-            lr = this->width();
-        if (fAnimationDirection & (kRightDirection|kURDirection|kDRDirection))
-            lr = -this->width();
-        if (fAnimationDirection & (kUpDirection|kULDirection|kURDirection))
-            ud = this->height();
-        if (fAnimationDirection & (kDownDirection|kDLDirection|kDRDirection))
-            ud = -this->height();
-
-        fBegin[kPrevX] = fBegin[kPrevY] = 0;
-        fBegin[kNextX] = lr;
-        fBegin[kNextY] = ud;
-        fNext->setLocX(lr);
-        fNext->setLocY(ud);
-
-        if (is_transition(fPrev))
-            lr = ud = 0;
-        fEnd[kPrevX] = -lr;
-        fEnd[kPrevY] = -ud;
-        fEnd[kNextX] = fEnd[kNextY] = 0;
-        SkScalar blend[] = { 0.8f, 0.0f,
-                             0.0f, SK_Scalar1 };
-        fInterp.setKeyFrame(0, SkTime::GetMSecs(), fBegin, blend);
-        fInterp.setKeyFrame(1, SkTime::GetMSecs()+kDurationMS, fEnd, blend);
-    }
-
-private:
-    enum {
-        kPrevX = 0,
-        kPrevY = 1,
-        kNextX = 2,
-        kNextY = 3
-    };
-    SkView* fPrev;
-    SkView* fNext;
-    bool    fDone;
-    SkInterpolator fInterp;
-
-    enum Direction{
-        kUpDirection    = 1,
-        kURDirection    = 1 << 1,
-        kRightDirection = 1 << 2,
-        kDRDirection    = 1 << 3,
-        kDownDirection  = 1 << 4,
-        kDLDirection    = 1 << 5,
-        kLeftDirection  = 1 << 6,
-        kULDirection    = 1 << 7
-    };
-
-    Direction fAnimationDirection;
-    SkScalar fBegin[4];
-    SkScalar fEnd[4];
-
-    typedef SampleView INHERITED;
-};
-
-SkView* create_transition(SkView* prev, SkView* next, int direction) {
-#ifdef SK_BUILD_FOR_ANDROID
-    // Disable transitions for Android
-    return next;
-#else
-    return SkNEW_ARGS(TransitionView, (prev, next, direction));
-#endif
-}