зеркало из https://github.com/mozilla/moz-skia.git
120 строки
2.9 KiB
C++
120 строки
2.9 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SampleCode.h"
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#include "SkCanvas.h"
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#include "SkView.h"
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namespace {
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const int N = 8;
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const SkScalar kWidth = SkIntToScalar(640);
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const SkScalar kHeight = SkIntToScalar(480);
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const char gIsOverview[] = "is-overview";
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} // namespace
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class OverView : public SkView {
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public:
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OverView(int count, const SkViewFactory* factories[]);
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virtual ~OverView();
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protected:
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// Overridden from SkEventSink:
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virtual bool onEvent(const SkEvent&) SK_OVERRIDE;
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virtual bool onQuery(SkEvent* evt) SK_OVERRIDE {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "Overview");
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return true;
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}
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if (evt->isType(gIsOverview)) {
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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// Overridden from SkView:
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virtual void onSizeChange() SK_OVERRIDE;
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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canvas->drawColor(SK_ColorLTGRAY);
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}
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virtual SkCanvas* beforeChildren(SkCanvas*) SK_OVERRIDE;
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virtual bool onSendClickToChildren(SkScalar x, SkScalar y) SK_OVERRIDE {
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return false;
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}
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virtual Click* onFindClickHandler(SkScalar x, SkScalar y) SK_OVERRIDE {
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int ix = (int)(SkScalarDiv(x * N, kWidth));
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int iy = (int)(SkScalarDiv(y * N, kHeight));
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if (ix >= 0 && iy >= 0) {
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SkEvent evt("set-curr-index");
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evt.setFast32(iy * N + ix);
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this->sendEventToParents(evt);
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}
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return NULL;
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}
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private:
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int fCount;
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const SkViewFactory** fFactories;
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typedef SkView INHERITED;
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};
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// FIXME: this should be in a header
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SkView* create_overview(int count, const SkViewFactory* factories[]);
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SkView* create_overview(int count, const SkViewFactory* factories[]) {
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return SkNEW_ARGS(OverView, (count, factories));
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}
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// FIXME: this should be in a header
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bool is_overview(SkView* view);
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bool is_overview(SkView* view) {
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SkEvent isOverview(gIsOverview);
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return view->doQuery(&isOverview);
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}
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OverView::OverView(int count, const SkViewFactory* factories[]) {
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fCount = count;
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fFactories = factories;
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}
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OverView::~OverView() {
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}
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bool OverView::onEvent(const SkEvent& evt) {
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return this->INHERITED::onEvent(evt);
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}
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void OverView::onSizeChange() {
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this->detachAllChildren();
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SkScalar locX = 0;
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SkScalar locY = 0;
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for (int i = 0; i < fCount; i++) {
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SkView* view = (*fFactories[i])();
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view->setVisibleP(true);
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this->attachChildToBack(view)->unref();
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view->setLoc(locX, locY);
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view->setSize(kWidth, kHeight);
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locX += kWidth;
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if ((i % N) == N - 1) {
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locY += kHeight;
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locX = 0;
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}
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}
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}
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SkCanvas* OverView::beforeChildren(SkCanvas* canvas) {
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canvas->scale(SK_Scalar1 / N, SK_Scalar1 / N);
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return canvas;
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}
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