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#pragma once
#include "pre.hpp"
#include <optional>
#include "render_object.hpp"
namespace cru::ui::render {
enum class FlexDirection {
Horizontal,
HorizontalReverse,
Vertical,
VertivalReverse
};
enum class Alignment { Start, End, Center };
struct FlexChildLayoutData {
std::optional<float> flex_basis;
float flex_grow = 0;
float flex_shrink = 0;
Alignment alignment = Alignment::Center;
};
class FlexLayoutRenderObject : public RenderObject {
public:
FlexLayoutRenderObject() = default;
FlexLayoutRenderObject(const FlexLayoutRenderObject& other) = delete;
FlexLayoutRenderObject& operator=(const FlexLayoutRenderObject& other) =
delete;
FlexLayoutRenderObject(FlexLayoutRenderObject&& other) = delete;
FlexLayoutRenderObject& operator=(FlexLayoutRenderObject&& other) = delete;
~FlexLayoutRenderObject() override = default;
FlexDirection GetFlexDirection() const { return direction_; }
void SetFlexDirection(FlexDirection direction) { direction_ = direction; }
FlexChildLayoutData* GetChildLayoutData(int position);
void Draw(ID2D1RenderTarget* render_target) override;
RenderObject* HitTest(const Point& point) override;
protected:
void OnAddChild(RenderObject* new_child, int position) override;
void OnRemoveChild(RenderObject* removed_child, int position) override;
Size OnMeasureContent(const Size& available_size) override;
void OnLayoutContent(const Rect& content_rect) override;
private:
FlexDirection direction_ = FlexDirection::Horizontal;
std::vector<FlexChildLayoutData> child_layout_data_{};
};
} // namespace cru::ui::render
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