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#pragma once
#include "../Base.h"
#include "../events/KeyEventArgs.h"
#include "../events/MouseWheelEventArgs.h"
#include "../events/UiEvents.h"
#include "../render/MeasureRequirement.h"
#include "../render/RenderObject.h"
#include "../style/StyleRuleSet.h"
#include <cru/base/SelfResolvable.h>
#include <cru/platform/gui/DeleteLater.h>
namespace cru::ui::controls {
struct ControlHostChangeEventArgs {
ControlHost* old_host;
ControlHost* new_host;
};
/**
* \remarks If you want to write a new control. You should override following
* methods:
* - GetControlType()
* - GetRenderObject()
*/
class CRU_UI_API Control : public Object,
public cru::platform::gui::DeleteLaterImpl<Control>,
public SelfResolvable<Control> {
friend class ControlHost;
private:
constexpr static auto kLogTag = "cru::ui::controls::Control";
protected:
explicit Control(std::string name);
public:
~Control() override;
public:
std::string GetName();
std::string GetDebugId();
//*************** region: tree ***************
public:
ControlHost* GetControlHost();
Control* GetParent();
bool HasAncestor(Control* control);
const std::vector<Control*>& GetChildren();
Index GetChildCount() { return GetChildren().size(); }
Control* GetChildAt(Index index) { return GetChildren()[index]; }
Index IndexOfChild(Control* control);
void RemoveChild(Control* child);
void RemoveAllChild();
void RemoveFromParent();
template <typename F>
void TraverseDescendents(F&& f, bool include_this) {
if (include_this) {
f(this);
}
for (auto child : GetChildren()) {
child->TraverseDescendents(std::forward<F>(f), true);
}
}
controls::Control* HitTest(const Point& point);
protected:
void InsertChildAt(Control* control, Index index);
void RemoveChildAt(Index index);
void AddChild(Control* control);
public:
virtual render::RenderObject* GetRenderObject() = 0;
virtual render::MeasureSize GetSuggestSize() {
return GetRenderObject()->GetSuggestSize();
}
virtual void SetSuggestSize(const render::MeasureSize& size) {
GetRenderObject()->SetSuggestSize(size);
}
virtual Thickness GetMargin() { return GetRenderObject()->GetMargin(); }
virtual void SetMargin(const Thickness& margin) {
GetRenderObject()->SetMargin(margin);
}
virtual Thickness GetPadding() { return GetRenderObject()->GetPadding(); }
virtual void SetPadding(const Thickness& padding) {
GetRenderObject()->SetPadding(padding);
}
//*************** region: focus ***************
public:
bool HasFocus();
void SetFocus();
//*************** region: mouse ***************
public:
bool IsMouseOver();
bool CaptureMouse();
bool ReleaseMouse();
bool IsMouseCaptured();
//*************** region: cursor ***************
// Cursor is inherited from parent recursively if not set.
public:
// null for not set
std::shared_ptr<platform::gui::ICursor> GetCursor();
// will not return nullptr
std::shared_ptr<platform::gui::ICursor> GetInheritedCursor();
// null to unset
void SetCursor(std::shared_ptr<platform::gui::ICursor> cursor);
public:
std::shared_ptr<style::StyleRuleSet> GetStyleRuleSet();
//*************** region: events ***************
public:
// Raised when mouse enter the control. Even when the control itself
// captures the mouse, this event is raised as regular. But if mouse is
// captured by another control, the control will not receive any mouse enter
// event. You can use `IsMouseCaptured` to get more info.
CRU_DEFINE_ROUTED_EVENT(MouseEnter, events::MouseEventArgs)
// Raised when mouse is leave the control. Even when the control itself
// captures the mouse, this event is raised as regular. But if mouse is
// captured by another control, the control will not receive any mouse leave
// event. You can use `IsMouseCaptured` to get more info.
CRU_DEFINE_ROUTED_EVENT(MouseLeave, events::MouseEventArgs)
CRU_DEFINE_ROUTED_EVENT(MouseMove, events::MouseEventArgs)
CRU_DEFINE_ROUTED_EVENT(MouseDown, events::MouseButtonEventArgs)
CRU_DEFINE_ROUTED_EVENT(MouseUp, events::MouseButtonEventArgs)
CRU_DEFINE_ROUTED_EVENT(MouseWheel, events::MouseWheelEventArgs)
CRU_DEFINE_ROUTED_EVENT(KeyDown, events::KeyEventArgs)
CRU_DEFINE_ROUTED_EVENT(KeyUp, events::KeyEventArgs)
CRU_DEFINE_ROUTED_EVENT(GainFocus, events::FocusChangeEventArgs)
CRU_DEFINE_ROUTED_EVENT(LoseFocus, events::FocusChangeEventArgs)
CRU_DEFINE_EVENT(ControlHostChange, const ControlHostChangeEventArgs&)
//*************** region: tree ***************
protected:
virtual void OnParentChanged(Control* old_parent, Control* new_parent);
virtual void OnChildInserted(Control* control, Index index);
virtual void OnChildRemoved(Control* control, Index index);
private:
std::string name_;
ControlHost* host_;
Control* parent_;
std::vector<Control*> children_;
std::shared_ptr<platform::gui::ICursor> cursor_;
std::shared_ptr<style::StyleRuleSet> style_rule_set_;
std::unique_ptr<style::StyleRuleSetBind> style_rule_set_bind_;
};
} // namespace cru::ui::controls
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