C++ (Cpp) HitRegion::id Examples

Example #1

File: CanvasRenderingContext2D.cpp Project: ollie314/chromium

HitTestCanvasResult* CanvasRenderingContext2D::getControlAndIdIfHitRegionExists(
    const LayoutPoint& location) {
  if (hitRegionsCount() <= 0)
    return HitTestCanvasResult::create(String(), nullptr);

  LayoutBox* box = canvas()->layoutBox();
  FloatPoint localPos =
      box->absoluteToLocal(FloatPoint(location), UseTransforms);
  if (box->hasBorderOrPadding())
    localPos.move(-box->contentBoxOffset());
  localPos.scale(canvas()->width() / box->contentWidth(),
                 canvas()->height() / box->contentHeight());

  HitRegion* hitRegion = hitRegionAtPoint(localPos);
  if (hitRegion) {
    Element* control = hitRegion->control();
    if (control && canvas()->isSupportedInteractiveCanvasFallback(*control))
      return HitTestCanvasResult::create(hitRegion->id(), hitRegion->control());
    return HitTestCanvasResult::create(hitRegion->id(), nullptr);
  }
  return HitTestCanvasResult::create(String(), nullptr);
}