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/*
* 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 "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 {
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, sksg::AnimatorList());
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, 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:
typedef Sample INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new SampleSG(); )