void Sample9(CanvasPlus::Canvas& canvas)
{
Context2D& ctx = canvas.getContext("2d");
CanvasGradient lingrad = ctx.createLinearGradient(0, 10 + 130, 0, 10);
lingrad.addColorStop(0, "rgb(255,0,0)");
lingrad.addColorStop(1, "rgb(255,255,255)");
ctx.fillStyle = lingrad;
ctx.fillRect(10, 10, 130, 130);
}
static v8::Handle<v8::Value> addColorStopCallback(const v8::Arguments& args)
{
INC_STATS("DOM.CanvasGradient.addColorStop");
CanvasGradient* imp = V8CanvasGradient::toNative(args.Holder());
ExceptionCode ec = 0;
{
EXCEPTION_BLOCK(float, offset, static_cast<float>(MAYBE_MISSING_PARAMETER(args, 0, MissingIsUndefined)->NumberValue()));
STRING_TO_V8PARAMETER_EXCEPTION_BLOCK(V8Parameter<>, color, MAYBE_MISSING_PARAMETER(args, 1, MissingIsUndefined));
imp->addColorStop(offset, color, ec);
if (UNLIKELY(ec))
goto fail;
return v8::Handle<v8::Value>();
}
fail:
V8Proxy::setDOMException(ec);
return v8::Handle<v8::Value>();
}
EncodedJSValue JSC_HOST_CALL jsCanvasGradientPrototypeFunctionAddColorStop(ExecState* exec)
{
JSValue thisValue = exec->hostThisValue();
if (!thisValue.inherits(&JSCanvasGradient::s_info))
return throwVMTypeError(exec);
JSCanvasGradient* castedThis = static_cast<JSCanvasGradient*>(asObject(thisValue));
ASSERT_GC_OBJECT_INHERITS(castedThis, &JSCanvasGradient::s_info);
CanvasGradient* imp = static_cast<CanvasGradient*>(castedThis->impl());
ExceptionCode ec = 0;
float offset(exec->argument(0).toFloat(exec));
if (exec->hadException())
return JSValue::encode(jsUndefined());
const String& color(ustringToString(exec->argument(1).toString(exec)));
if (exec->hadException())
return JSValue::encode(jsUndefined());
imp->addColorStop(offset, color, ec);
setDOMException(exec, ec);
return JSValue::encode(jsUndefined());
}
void Sample11(CanvasPlus::Canvas& canvas)
{
Context2D& ctx = canvas.getContext("2d");
bool ispressed = false;
bool isfocused = true;
CanvasGradient lingrad = ctx.createLinearGradient(0, 10 + 130, 0, 10);
if (ispressed)
{
lingrad.addColorStop(0, "rgb(245,245,245)");
lingrad.addColorStop(1, "rgb(220,220,220)");
}
else
{
lingrad.addColorStop(1, "rgb(220,220,220)");
lingrad.addColorStop(0, "rgb(245,245,245)");
}
ctx.fillStyle = lingrad;
ctx.fillRect(10, 10, 130, 130);
if (isfocused)
{
ctx.strokeStyle = "rgb(74,144,254)";
}
else
{
ctx.strokeStyle = "rgb(198,198,198)";
}
ctx.strokeRect(10, 10, 130, 130);
ctx.fillStyle = "rgb(0,0,0)";
ctx.textAlign = "center";
ctx.textBaseline = "middle";
ctx.fillText(L"Button", (10 + 10 + 130) / 2, (10 + 10 + 130) / 2);
}
