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110 lines
3.0 KiB
110 lines
3.0 KiB
4 months ago
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/*
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* Copyright 2019 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 "include/core/SkCanvas.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkFontMetrics.h"
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#include "include/core/SkPath.h"
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#include "samplecode/Sample.h"
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#include "modules/sksg/include/SkSGDraw.h"
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#include "modules/sksg/include/SkSGGroup.h"
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#include "modules/sksg/include/SkSGPaint.h"
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#include "modules/sksg/include/SkSGRect.h"
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#include "modules/sksg/include/SkSGScene.h"
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struct PerNodeInfo {
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// key
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sksg::Draw* fDraw;
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// value(s)
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sksg::GeometryNode* fGeo;
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sksg::PaintNode* fPaint;
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};
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class SampleSG : public Sample {
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SkTDArray<PerNodeInfo> fSideCar;
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sk_sp<sksg::Group> fGroup;
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std::unique_ptr<sksg::Scene> fScene;
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PerNodeInfo* findInfo(sksg::Draw* key) {
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for (int i = 0; i < fSideCar.count(); ++i) {
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if (fSideCar[i].fDraw == key) {
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return &fSideCar[i];
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}
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}
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return nullptr;
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}
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void appendNode(sk_sp<sksg::Draw> d, sk_sp<sksg::GeometryNode> g, sk_sp<sksg::PaintNode> p) {
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fGroup->addChild(d);
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auto sc = fSideCar.append();
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sc->fDraw = d.get();
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sc->fGeo = g.get();
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sc->fPaint = p.get();
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}
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public:
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SampleSG() {
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fGroup = sksg::Group::Make();
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fScene = sksg::Scene::Make(fGroup);
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auto r = sksg::Rect::Make({20, 20, 400, 300});
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auto p = sksg::Color::Make(SK_ColorRED);
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auto d = sksg::Draw::Make(r, p);
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this->appendNode(d, r, p);
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r = sksg::Rect::Make({60, 70, 300, 400});
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p = sksg::Color::Make(SK_ColorBLUE);
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d = sksg::Draw::Make(r, p);
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this->appendNode(d, r, p);
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}
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protected:
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SkString name() override { return SkString("SceneGraph"); }
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void onDrawContent(SkCanvas* canvas) override {
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fScene->render(canvas);
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}
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Click* onFindClickHandler(SkScalar x, SkScalar y, skui::ModifierKey modi) override {
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if (auto node = fScene->nodeAt({x, y})) {
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Click* click = new Click();
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click->fMeta.setPtr("node", (void*)node);
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return click;
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}
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return nullptr;
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}
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bool onClick(Click* click) override {
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sksg::Draw* node = nullptr;
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if (click->fMeta.findPtr("node", (void**)&node)) {
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if (auto info = this->findInfo(node)) {
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auto geo = info->fGeo;
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sksg::Rect* r = (sksg::Rect*)geo;
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SkScalar dx = click->fCurr.fX - click->fPrev.fX;
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SkScalar dy = click->fCurr.fY - click->fPrev.fY;
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r->setL(r->getL() + dx);
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r->setR(r->getR() + dx);
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r->setT(r->getT() + dy);
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r->setB(r->getB() + dy);
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}
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return true;
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}
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return false;
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}
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private:
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using INHERITED = Sample;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new SampleSG(); )
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