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#pragma once
#include "pre.hpp"
#include <optional>
#include <vector>
#include "system_headers.hpp"
#include "base.hpp"
#include "ui/ui_base.hpp"
namespace cru::ui::render {
struct IRenderHost : Interface {
virtual void InvalidatePaint() = 0;
virtual void InvalidateLayout() = 0;
};
class RenderObject : public Object {
protected:
RenderObject() = default;
public:
RenderObject(const RenderObject& other) = delete;
RenderObject(RenderObject&& other) = delete;
RenderObject& operator=(const RenderObject& other) = delete;
RenderObject& operator=(RenderObject&& other) = delete;
~RenderObject() override = default;
IRenderHost* GetRenderHost() const { return render_host_; }
void SetRenderHost(IRenderHost* new_render_host);
RenderObject* GetParent() const { return parent_; }
const std::vector<RenderObject*>& GetChildren() const { return children_; }
void AddChild(RenderObject* render_object, int position);
void RemoveChild(int position);
Point GetOffset() const { return offset_; }
void SetOffset(const Point& offset) { offset_ = offset; }
Size GetSize() const { return size_; }
void SetSize(const Size& size) { size_ = size; }
Thickness GetMargin() const { return margin_; }
void SetMargin(const Thickness& margin) { margin_ = margin; }
Thickness GetPadding() const { return padding_; }
void SetPadding(const Thickness& padding) { padding_ = padding; }
Size GetPreferredSize() const { return preferred_size_; }
void SetPreferredSize(const Size& preferred_size) {
preferred_size_ = preferred_size;
}
void Measure(const Size& available_size);
void Layout(const Rect& rect);
virtual void Draw(ID2D1RenderTarget* render_target) = 0;
virtual RenderObject* HitTest(const Point& point) = 0;
protected:
virtual void OnRenderHostChanged(IRenderHost* old_render_host,
IRenderHost* new_render_host);
void InvalidateRenderHostPaint() const;
void InvalidateRenderHostLayout() const;
virtual void OnParentChanged(RenderObject* old_parent,
RenderObject* new_parent);
virtual void OnAddChild(RenderObject* new_child, int position);
virtual void OnRemoveChild(RenderObject* removed_child, int position);
virtual Size OnMeasureContent(const Size& available_size) = 0;
virtual void OnLayoutContent(const Rect& content_rect) = 0;
private:
void SetParent(RenderObject* new_parent);
void OnMeasureCore(const Size& available_size);
void OnLayoutCore(const Rect& rect);
private:
IRenderHost* render_host_ = nullptr;
RenderObject* parent_ = nullptr;
std::vector<RenderObject*> children_{};
Point offset_ = Point::Zero();
Size size_ = Size::Zero();
Thickness margin_ = Thickness::Zero();
Thickness padding_ = Thickness::Zero();
Size preferred_size_ = Size::Zero();
};
} // namespace cru::ui::render
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