| /* |
| * Copyright 2019 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkFontMetrics.h" |
| #include "include/core/SkPath.h" |
| #include "include/private/SkTDArray.h" |
| #include "samplecode/Sample.h" |
| |
| #include "modules/sksg/include/SkSGDraw.h" |
| #include "modules/sksg/include/SkSGGroup.h" |
| #include "modules/sksg/include/SkSGPaint.h" |
| #include "modules/sksg/include/SkSGRect.h" |
| #include "modules/sksg/include/SkSGScene.h" |
| |
| struct PerNodeInfo { |
| // key |
| sksg::Draw* fDraw; |
| |
| // value(s) |
| sksg::GeometryNode* fGeo; |
| sksg::PaintNode* fPaint; |
| }; |
| |
| class SampleSG : public Sample { |
| // TODO(kjlubick) use a vector instead of our private SkTDArray |
| SkTDArray<PerNodeInfo> fSideCar; |
| sk_sp<sksg::Group> fGroup; |
| std::unique_ptr<sksg::Scene> fScene; |
| |
| PerNodeInfo* findInfo(sksg::Draw* key) { |
| for (int i = 0; i < fSideCar.count(); ++i) { |
| if (fSideCar[i].fDraw == key) { |
| return &fSideCar[i]; |
| } |
| } |
| return nullptr; |
| } |
| |
| void appendNode(sk_sp<sksg::Draw> d, sk_sp<sksg::GeometryNode> g, sk_sp<sksg::PaintNode> p) { |
| fGroup->addChild(d); |
| auto sc = fSideCar.append(); |
| sc->fDraw = d.get(); |
| sc->fGeo = g.get(); |
| sc->fPaint = p.get(); |
| } |
| |
| public: |
| SampleSG() { |
| fGroup = sksg::Group::Make(); |
| |
| fScene = sksg::Scene::Make(fGroup); |
| |
| auto r = sksg::Rect::Make({20, 20, 400, 300}); |
| auto p = sksg::Color::Make(SK_ColorRED); |
| auto d = sksg::Draw::Make(r, p); |
| this->appendNode(d, r, p); |
| |
| r = sksg::Rect::Make({60, 70, 300, 400}); |
| p = sksg::Color::Make(SK_ColorBLUE); |
| d = sksg::Draw::Make(r, p); |
| this->appendNode(d, r, p); |
| } |
| |
| protected: |
| SkString name() override { return SkString("SceneGraph"); } |
| |
| void onDrawContent(SkCanvas* canvas) override { |
| fScene->render(canvas); |
| } |
| |
| Click* onFindClickHandler(SkScalar x, SkScalar y, skui::ModifierKey modi) override { |
| if (auto node = fScene->nodeAt({x, y})) { |
| Click* click = new Click(); |
| click->fMeta.setPtr("node", (void*)node); |
| return click; |
| } |
| return nullptr; |
| } |
| |
| bool onClick(Click* click) override { |
| sksg::Draw* node = nullptr; |
| if (click->fMeta.findPtr("node", (void**)&node)) { |
| if (auto info = this->findInfo(node)) { |
| auto geo = info->fGeo; |
| sksg::Rect* r = (sksg::Rect*)geo; |
| SkScalar dx = click->fCurr.fX - click->fPrev.fX; |
| SkScalar dy = click->fCurr.fY - click->fPrev.fY; |
| r->setL(r->getL() + dx); |
| r->setR(r->getR() + dx); |
| r->setT(r->getT() + dy); |
| r->setB(r->getB() + dy); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| private: |
| |
| using INHERITED = Sample; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SAMPLE( return new SampleSG(); ) |