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#pragma once
#include "Control.h"
namespace cru::ui::controls {
template <typename TRenderObject>
class LayoutControl : public Control {
protected:
LayoutControl() : container_render_object_(new TRenderObject()) {
container_render_object_->SetAttachedControl(this);
}
public:
LayoutControl(const LayoutControl& other) = delete;
LayoutControl(LayoutControl&& other) = delete;
LayoutControl& operator=(const LayoutControl& other) = delete;
LayoutControl& operator=(LayoutControl&& other) = delete;
~LayoutControl() override { ClearChildren(); }
public:
const std::vector<Control*>& GetChildren() const { return children_; }
Index GetChildCount() const { return children_.size(); }
Control* GetChild(Index index) const { return children_[index]; }
Index IndexOf(Control* control) const {
auto it = std::find(children_.begin(), children_.end(), control);
if (it == children_.end()) {
return -1;
}
return it - children_.begin();
}
void ForEachChild(const std::function<void(Control*)>& callback) override {
for (auto child : children_) {
callback(child);
}
}
void RemoveChild(Control* child) override {
auto index = IndexOf(child);
if (index != -1) {
RemoveChildAt(index);
}
}
render::RenderObject* GetRenderObject() const override {
return container_render_object_.get();
}
TRenderObject* GetContainerRenderObject() const {
return container_render_object_.get();
}
void AddChildAt(Control* child, Index position) {
Expects(child);
Expects(child->GetParent() == nullptr);
if (position < 0) position = 0;
if (position > children_.size()) position = children_.size();
children_.insert(children_.begin() + position, child);
child->SetParent(this);
assert(child->GetRenderObject());
container_render_object_->AddChild(child->GetRenderObject(), position);
}
void AddChild(Control* child) { AddChildAt(child, GetChildCount()); }
void RemoveChildAt(Index position) {
if (position < 0 || position >= children_.size()) return;
auto child = children_[position];
children_.erase(children_.begin() + position);
child->SetParent(nullptr);
container_render_object_->RemoveChild(position);
}
void ClearChildren() {
for (auto child : children_) {
child->SetParent(nullptr);
}
children_.clear();
container_render_object_->ClearChildren();
}
const typename TRenderObject::ChildLayoutData& GetChildLayoutData(
Index position) {
return container_render_object_->GetChildLayoutDataAt(position);
}
void SetChildLayoutData(Index position,
typename TRenderObject::ChildLayoutData data) {
container_render_object_->SetChildLayoutDataAt(position, data);
}
private:
std::unique_ptr<TRenderObject> container_render_object_;
std::vector<Control*> children_;
};
} // namespace cru::ui::controls
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