Extra2D/src/ui/widget.cpp

#include <cmath>
#include <ui/widget.h>

namespace extra2d {

Widget::Widget() {
  setSpatialIndexed(false);
}

void Widget::setSize(const Size &size) {
  size_ = size;
  updateSpatialIndex();
}

void Widget::setSize(float width, float height) {
  setSize(Size(width, height));
}

Rect Widget::getBoundingBox() const {
  if (size_.empty()) {
    return Rect();
  }

  auto pos = convertToWorldSpace(extra2d::Vec2::Zero());
  auto anchor = getAnchor();
  auto scale = getScale();

  float w = size_.width * scale.x;
  float h = size_.height * scale.y;
  float x0 = pos.x - size_.width * anchor.x * scale.x;
  float y0 = pos.y - size_.height * anchor.y * scale.y;
  float x1 = x0 + w;
  float y1 = y0 + h;

  float l = std::min(x0, x1);
  float t = std::min(y0, y1);
  return Rect(l, t, std::abs(w), std::abs(h));
}

// ------------------------------------------------------------------------
// 重写 onDraw
// ------------------------------------------------------------------------
void Widget::onDraw(RenderBackend &renderer) {
  onDrawWidget(renderer);
}

} // namespace extra2d