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add fatstroke sample

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BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4347

Change-Id: Ib9872fba7f9f939322bbf943be3fa433721da899
Reviewed-on: https://skia-review.googlesource.com/4347
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
This commit is contained in:
Mike Reed 2016-11-02 22:09:25 -04:00 committed by Skia Commit-Bot
parent 13078c8f33
commit a964a29141
1 changed files with 133 additions and 0 deletions
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133
samplecode/SamplePath.cpp
View File

@ -333,3 +333,136 @@ private:
typedef SampleView INHERITED;
};
DEF_SAMPLE( return new ArcToView; )
/////////////
class FatStroke : public SampleView {
bool fClosed, fShowStroke, fShowHidden, fShowSkeleton;
int fJoinType, fCapType;
SkPaint fPtsPaint, fHiddenPaint, fSkeletonPaint, fStrokePaint;
public:
enum {
N = 4
};
SkPoint fPts[N];
FatStroke() : fClosed(false), fShowStroke(true), fShowHidden(false), fShowSkeleton(true),
fJoinType(0), fCapType(0)
{
SkRandom rand;
for (int i = 0; i < N; ++i) {
fPts[i].fX = 20 + rand.nextUScalar1() * 640;
fPts[i].fY = 20 + rand.nextUScalar1() * 480;
}
fPtsPaint.setAntiAlias(true);
fPtsPaint.setStrokeWidth(10);
fPtsPaint.setStrokeCap(SkPaint::kRound_Cap);
fHiddenPaint.setAntiAlias(true);
fHiddenPaint.setStyle(SkPaint::kStroke_Style);
fHiddenPaint.setColor(0xFF0000FF);
fStrokePaint.setAntiAlias(true);
fStrokePaint.setStyle(SkPaint::kStroke_Style);
fStrokePaint.setStrokeWidth(50);
fStrokePaint.setColor(0x8000FF00);
fSkeletonPaint.setAntiAlias(true);
fSkeletonPaint.setStyle(SkPaint::kStroke_Style);
fSkeletonPaint.setColor(SK_ColorRED);
}
void toggle(bool& value) {
value = !value;
this->inval(nullptr);
}
void toggle3(int& value) {
value = (value + 1) % 3;
this->inval(nullptr);
}
protected:
// overrides from SkEventSink
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "FatStroke");
return true;
}
SkUnichar uni;
if (SampleCode::CharQ(*evt, &uni)) {
switch (uni) {
case '1': this->toggle(fShowSkeleton); return true;
case '2': this->toggle(fShowStroke); return true;
case '3': this->toggle(fShowHidden); return true;
case '4': this->toggle3(fJoinType); return true;
case '5': this->toggle3(fCapType); return true;
case '6': this->toggle(fClosed); return true;
default: break;
}
}
return this->INHERITED::onQuery(evt);
}
void makePath(SkPath* path) {
path->moveTo(fPts[0]);
for (int i = 1; i < N; ++i) {
path->lineTo(fPts[i]);
}
if (fClosed) {
path->close();
}
}
void onDrawContent(SkCanvas* canvas) override {
canvas->drawColor(0xFFEEEEEE);
SkPath path;
this->makePath(&path);
fStrokePaint.setStrokeJoin((SkPaint::Join)fJoinType);
fStrokePaint.setStrokeCap((SkPaint::Cap)fCapType);
if (fShowStroke) {
canvas->drawPath(path, fStrokePaint);
}
if (fShowHidden) {
SkPath hidden;
fStrokePaint.getFillPath(path, &hidden);
canvas->drawPath(hidden, fHiddenPaint);
}
if (fShowSkeleton) {
canvas->drawPath(path, fSkeletonPaint);
}
canvas->drawPoints(SkCanvas::kPoints_PointMode, N, fPts, fPtsPaint);
}
bool onClick(Click* click) override {
int32_t index;
if (click->fMeta.findS32("index", &index)) {
SkASSERT((unsigned)index < N);
fPts[index] = click->fCurr;
this->inval(nullptr);
return true;
}
return false;
}
SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override {
const SkScalar tol = 4;
const SkRect r = SkRect::MakeXYWH(x - tol, y - tol, tol * 2, tol * 2);
for (int i = 0; i < N; ++i) {
if (r.intersects(SkRect::MakeXYWH(fPts[i].fX, fPts[i].fY, 1, 1))) {
Click* click = new Click(this);
click->fMeta.setS32("index", i);
return click;
}
}
return this->INHERITED::onFindClickHandler(x, y, modi);
}
private:
typedef SampleView INHERITED;
};
DEF_SAMPLE( return new FatStroke; )