void xsCanvasContext::clearRect(float x, float y, float width, float height)
{
xsGraphics *gc = xsGetSystemGc();
xsSetColor(gc, XS_COLOR_WHITE);
xsFillRectangle(gc, x, y, width, height);
xsFlushScreen(x, y, x + width, y + height);
}
int DemoApp::start()
{
xsColor color = {255,255,255,255};
xsSetColor(xsGetSystemGc(), color);
xsGetScreenDimension(&width, &height);
xsFillRectangle(xsGetSystemGc(), 0, 0, width, height);//, xsArgbToColor(0xFFFFFFFF));
xsFlushScreen(0, 0, width - 1, height - 1);
const char * js = getManifest()->getStartup();
invokeJavascript(js, LOAD_JS_STRING);
x = (width - BOX_SIZE) / 2;
y = (height - BOX_SIZE) / 2;
//img = this->getResource()->loadImage(xsT("logo-48x48.jpg"));
//timer = xsStartTimer(20, _onTimeout, this);
return XS_EC_OK;
}
int DemoApp::onTimeout()
{
xsGraphics *gc = xsGetSystemGc();
// clear
xsColor color = {255, 255, 255, 255};
xsSetColor(gc, color);
xsFillRectangle(gc, x, y, BOX_SIZE, BOX_SIZE);//, xsArgbToColor(0xFFFFFFFF));
// draw new box
x += rateX;
y += rateY;
if (x < 0 || x + BOX_SIZE > width)
rateX = -rateX;
if (y < 0 || y + BOX_SIZE > height)
rateY = -rateY;
xsDrawImage(gc, img, x, y, 0, 0);
xsFlushScreen(0, 0, width - 1, height - 1);
return 0;
}
