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);
}
const char* State::getSlideTitle(int index) const {
SkEvent evt(gTitleEvtName);
evt.setFast32(index);
{
SkView* view = fFactory[index]();
view->doQuery(&evt);
view->unref();
}
return evt.findString(gTitleEvtName);
}