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#pragma once
#include "Base.hpp"
#include "cru/common/Event.hpp"
#include "render/Base.hpp"
#include "UiEvent.hpp"
#include <string_view>
namespace cru::ui {
class Control : public Object {
friend UiHost;
protected:
Control();
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::string_view GetControlType() const = 0;
//*************** region: tree ***************
public:
// Get the ui host if attached, otherwise, return nullptr.
UiHost* GetUiHost() const { return ui_host_; }
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 _SetDescendantUiHost(UiHost* host);
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: mouse ***************
public:
bool IsMouseOver() const { return is_mouse_over_; }
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::native::ICursor> GetCursor();
// will not return nullptr
std::shared_ptr<platform::native::ICursor> GetInheritedCursor();
// null to unset
void SetCursor(std::shared_ptr<platform::native::ICursor> cursor);
//*************** 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.
event::RoutedEvent<event::MouseEventArgs>* MouseEnterEvent() {
return &mouse_enter_event_;
}
// 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.
event::RoutedEvent<event::MouseEventArgs>* MouseLeaveEvent() {
return &mouse_leave_event_;
}
// Raised when mouse is move in the control.
event::RoutedEvent<event::MouseEventArgs>* MouseMoveEvent() {
return &mouse_move_event_;
}
// Raised when a mouse button is pressed in the control.
event::RoutedEvent<event::MouseButtonEventArgs>* MouseDownEvent() {
return &mouse_down_event_;
}
// Raised when a mouse button is released in the control.
event::RoutedEvent<event::MouseButtonEventArgs>* MouseUpEvent() {
return &mouse_up_event_;
}
event::RoutedEvent<event::MouseWheelEventArgs>* MouseWheelEvent() {
return &mouse_wheel_event_;
}
event::RoutedEvent<event::KeyEventArgs>* KeyDownEvent() {
return &key_down_event_;
}
event::RoutedEvent<event::KeyEventArgs>* KeyUpEvent() {
return &key_up_event_;
}
event::RoutedEvent<event::FocusChangeEventArgs>* GainFocusEvent() {
return &gain_focus_event_;
}
event::RoutedEvent<event::FocusChangeEventArgs>* LoseFocusEvent() {
return &lose_focus_event_;
}
private:
event::RoutedEvent<event::MouseEventArgs> mouse_enter_event_;
event::RoutedEvent<event::MouseEventArgs> mouse_leave_event_;
event::RoutedEvent<event::MouseEventArgs> mouse_move_event_;
event::RoutedEvent<event::MouseButtonEventArgs> mouse_down_event_;
event::RoutedEvent<event::MouseButtonEventArgs> mouse_up_event_;
event::RoutedEvent<event::MouseWheelEventArgs> mouse_wheel_event_;
event::RoutedEvent<event::KeyEventArgs> key_down_event_;
event::RoutedEvent<event::KeyEventArgs> key_up_event_;
event::RoutedEvent<event::FocusChangeEventArgs> gain_focus_event_;
event::RoutedEvent<event::FocusChangeEventArgs> lose_focus_event_;
//*************** region: tree ***************
protected:
virtual void OnParentChanged(Control* old_parent, Control* new_parent);
virtual void OnAttachToHost(UiHost* host);
virtual void OnDetachFromHost(UiHost* host);
virtual void OnMouseHoverChange(bool newHover) { CRU_UNUSED(newHover) }
private:
UiHost* ui_host_ = nullptr;
Control* parent_ = nullptr;
private:
bool is_mouse_over_ = false;
std::shared_ptr<platform::native::ICursor> cursor_ = nullptr;
};
} // namespace cru::ui
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