more layers extracted from webkit
git-svn-id: http://skia.googlecode.com/svn/trunk@503 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleSkLayer.cpp b/samplecode/SampleSkLayer.cpp
new file mode 100644
index 0000000..42f0a60
--- /dev/null
+++ b/samplecode/SampleSkLayer.cpp
@@ -0,0 +1,92 @@
+#include "SampleCode.h"
+#include "SkCanvas.h"
+#include "SkPaint.h"
+#include "SkView.h"
+#include "SkLayer.h"
+
+///////////////////////////////////////////////////////////////////////////////
+
+class TestLayer : public SkLayer {
+public:
+ TestLayer(SkColor c) : fColor(c) {}
+
+protected:
+ virtual void onDraw(SkCanvas* canvas, SkScalar opacity) {
+ SkRect r;
+ r.set(0, 0, this->getWidth(), this->getHeight());
+
+ SkPaint paint;
+ paint.setColor(fColor);
+ paint.setAlpha(SkScalarRound(opacity * 255));
+
+ canvas->drawRect(r, paint);
+ }
+
+private:
+ SkColor fColor;
+};
+
+class SkLayerView : public SkView {
+private:
+ SkLayer* fRootLayer;
+
+public:
+ SkLayerView() {
+ static const int W = 640;
+ static const int H = 480;
+ static const struct {
+ int fWidth;
+ int fHeight;
+ SkColor fColor;
+ int fPosX;
+ int fPosY;
+ } gData[] = {
+ { 120, 80, SK_ColorRED, 0, 0 },
+ { 120, 80, SK_ColorGREEN, W - 120, 0 },
+ { 120, 80, SK_ColorBLUE, 0, H - 80 },
+ { 120, 80, SK_ColorMAGENTA, W - 120, H - 80 },
+ };
+
+ fRootLayer = new SkLayer;
+ fRootLayer->setSize(W, H);
+ for (size_t i = 0; i < SK_ARRAY_COUNT(gData); i++) {
+ SkLayer* child = new TestLayer(gData[i].fColor);
+ child->setSize(gData[i].fWidth, gData[i].fHeight);
+ child->setPosition(gData[i].fPosX, gData[i].fPosY);
+ fRootLayer->addChild(child)->unref();
+ }
+ }
+
+ virtual ~SkLayerView() {
+ SkSafeUnref(fRootLayer);
+ }
+
+protected:
+ // overrides from SkEventSink
+ virtual bool onQuery(SkEvent* evt) {
+ if (SampleCode::TitleQ(*evt)) {
+ SampleCode::TitleR(evt, "SkLayer");
+ return true;
+ }
+ return this->INHERITED::onQuery(evt);
+ }
+
+ void drawBG(SkCanvas* canvas) {
+ canvas->drawColor(0xFFDDDDDD);
+
+ fRootLayer->draw(canvas);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) {
+ this->drawBG(canvas);
+}
+
+private:
+ typedef SkView INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new SkLayerView; }
+static SkViewRegister reg(MyFactory);
+