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#pragma once
#include "cru/common/base.hpp"
#include "cru/ui/event/ui_event.hpp"
#include ""
#include <string_view>
namespace cru::ui {
class Window;
class Control : public Object {
friend class Window;
protected:
Control() = default;
public:
Control(const Control& other) = delete;
Control(Control&& other) = delete;
Control& operator=(const Control& other) = delete;
Control& operator=(Control&& other) = delete;
~Control() override = default;
public:
virtual std::wstring_view GetControlType() const = 0;
//*************** region: tree ***************
public:
// Get the window if attached, otherwise, return nullptr.
Window* GetWindow() const { return window_; }
Control* GetParent() const { return parent_; }
virtual const std::vector<Control*>& GetChildren() const = 0;
// Traverse the tree rooted the control including itself.
void TraverseDescendants(const std::function<void(Control*)>& predicate);
void _SetParent(Control* parent);
void _SetDescendantWindow(Window* window);
private:
static void _TraverseDescendants(
Control* control, const std::function<void(Control*)>& predicate);
public:
virtual render::RenderObject* GetRenderObject() const = 0;
//*************** region: focus ***************
public:
bool RequestFocus();
bool HasFocus();
//*************** region: events ***************
public:
// Raised when mouse enter the control.
events::RoutedEvent<events::MouseEventArgs>* MouseEnterEvent() {
return &mouse_enter_event_;
}
// Raised when mouse is leave the control.
events::RoutedEvent<events::MouseEventArgs>* MouseLeaveEvent() {
return &mouse_leave_event_;
}
// Raised when mouse is move in the control.
events::RoutedEvent<events::MouseEventArgs>* MouseMoveEvent() {
return &mouse_move_event_;
}
// Raised when a mouse button is pressed in the control.
events::RoutedEvent<events::MouseButtonEventArgs>* MouseDownEvent() {
return &mouse_down_event_;
}
// Raised when a mouse button is released in the control.
events::RoutedEvent<events::MouseButtonEventArgs>* MouseUpEvent() {
return &mouse_up_event_;
}
// Raised when a mouse button is pressed in the control and released in the
// control with mouse not leaving it between two operations.
events::RoutedEvent<events::MouseButtonEventArgs>* MouseClickEvent() {
return &mouse_click_event_;
}
events::RoutedEvent<events::MouseWheelEventArgs>* MouseWheelEvent() {
return &mouse_wheel_event_;
}
events::RoutedEvent<events::KeyEventArgs>* KeyDownEvent() {
return &key_down_event_;
}
events::RoutedEvent<events::KeyEventArgs>* KeyUpEvent() {
return &key_up_event_;
}
events::RoutedEvent<events::CharEventArgs>* CharEvent() {
return &char_event_;
}
events::RoutedEvent<events::FocusChangeEventArgs>* GainFocusEvent() {
return &gain_focus_event_;
}
events::RoutedEvent<events::FocusChangeEventArgs>* LoseFocusEvent() {
return &lose_focus_event_;
}
private:
events::RoutedEvent<events::MouseEventArgs> mouse_enter_event_;
events::RoutedEvent<events::MouseEventArgs> mouse_leave_event_;
events::RoutedEvent<events::MouseEventArgs> mouse_move_event_;
events::RoutedEvent<events::MouseButtonEventArgs> mouse_down_event_;
events::RoutedEvent<events::MouseButtonEventArgs> mouse_up_event_;
events::RoutedEvent<events::MouseButtonEventArgs> mouse_click_event_;
events::RoutedEvent<events::MouseWheelEventArgs> mouse_wheel_event_;
events::RoutedEvent<events::KeyEventArgs> key_down_event_;
events::RoutedEvent<events::KeyEventArgs> key_up_event_;
events::RoutedEvent<events::CharEventArgs> char_event_;
events::RoutedEvent<events::FocusChangeEventArgs> gain_focus_event_;
events::RoutedEvent<events::FocusChangeEventArgs> lose_focus_event_;
//*************** region: tree ***************
protected:
virtual void OnParentChanged(Control* old_parent, Control* new_parent);
virtual void OnAttachToWindow(Window* window);
virtual void OnDetachToWindow(Window* window);
//*************** region: additional mouse event ***************
protected:
virtual void OnMouseClickBegin(MouseButton button);
virtual void OnMouseClickEnd(MouseButton button);
private:
Window* window_ = nullptr;
Control* parent_ = nullptr;
};
} // namespace cru::ui
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