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#pragma once
#include "RenderObject.hpp"
#include "cru/platform/graph/util/Painter.hpp"
namespace cru::ui::render {
template <typename TChildLayoutData>
class LayoutRenderObject : public RenderObject {
public:
using ChildLayoutData = TChildLayoutData;
protected:
LayoutRenderObject() : RenderObject(ChildMode::Multiple) {}
public:
CRU_DELETE_COPY(LayoutRenderObject)
CRU_DELETE_MOVE(LayoutRenderObject)
~LayoutRenderObject() override = default;
const std::vector<ChildLayoutData>& GetChildLayoutDataList() const {
return this->child_layout_data_;
}
void SetChildLayoutData(Index position, ChildLayoutData data) {
Expects(position >= 0 &&
position < static_cast<Index>(this->child_layout_data_.size()));
this->child_layout_data_[position] = std::move(data);
this->InvalidateLayout();
}
const ChildLayoutData& GetChildLayoutData(Index position) const {
Expects(position >= 0 &&
position < static_cast<Index>(this->child_layout_data_.size()));
return this->child_layout_data_[position];
}
RenderObject* HitTest(const Point& point) override;
protected:
void OnAddChild(RenderObject* new_child, Index position) override;
void OnRemoveChild(RenderObject* removed_child, Index position) override;
private:
std::vector<ChildLayoutData> child_layout_data_{};
};
template <typename TChildLayoutData>
RenderObject* LayoutRenderObject<TChildLayoutData>::HitTest(
const Point& point) {
const auto& children = GetChildren();
for (auto i = children.crbegin(); i != children.crend(); ++i) {
auto offset = (*i)->GetOffset();
Point p{point.x - offset.x, point.y - offset.y};
const auto result = (*i)->HitTest(p);
if (result != nullptr) {
return result;
}
}
const auto margin = GetMargin();
const auto size = GetSize();
return Rect{margin.left, margin.top,
std::max(size.width - margin.GetHorizontalTotal(), 0.0f),
std::max(size.height - margin.GetVerticalTotal(), 0.0f)}
.IsPointInside(point)
? this
: nullptr;
} // namespace cru::ui::render
template <typename TChildLayoutData>
void LayoutRenderObject<TChildLayoutData>::OnAddChild(RenderObject* new_child,
const Index position) {
CRU_UNUSED(new_child)
child_layout_data_.emplace(child_layout_data_.cbegin() + position);
}
template <typename TChildLayoutData>
void LayoutRenderObject<TChildLayoutData>::OnRemoveChild(
RenderObject* removed_child, const Index position) {
CRU_UNUSED(removed_child)
child_layout_data_.erase(child_layout_data_.cbegin() + position);
}
} // namespace cru::ui::render
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