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#pragma once
#include "base.hpp"
#include "cru/common/event.hpp"
#include <memory>
#include <optional>
#include <type_traits>
namespace cru::platform::graph {
struct IPainter;
}
namespace cru::ui {
class Control;
}
namespace cru::ui::event {
class UiEventArgs : public Object {
public:
UiEventArgs(Object* sender, Object* original_sender)
: sender_(sender), original_sender_(original_sender), handled_(false) {}
UiEventArgs(const UiEventArgs& other) = default;
UiEventArgs(UiEventArgs&& other) = default;
UiEventArgs& operator=(const UiEventArgs& other) = default;
UiEventArgs& operator=(UiEventArgs&& other) = default;
~UiEventArgs() override = default;
Object* GetSender() const { return sender_; }
Object* GetOriginalSender() const { return original_sender_; }
bool IsHandled() const { return handled_; }
void SetHandled(const bool handled = true) { handled_ = handled; }
private:
Object* sender_;
Object* original_sender_;
bool handled_;
};
// TEventArgs must not be a reference type. This class help add reference.
// EventArgs must be reference because the IsHandled property must be settable.
template <typename TEventArgs>
class RoutedEvent {
public:
static_assert(std::is_base_of_v<UiEventArgs, TEventArgs>,
"TEventArgs must be subclass of UiEventArgs.");
static_assert(!std::is_reference_v<TEventArgs>,
"TEventArgs must not be reference.");
using EventArgs = TEventArgs;
RoutedEvent() = default;
RoutedEvent(const RoutedEvent& other) = delete;
RoutedEvent(RoutedEvent&& other) = delete;
RoutedEvent& operator=(const RoutedEvent& other) = delete;
RoutedEvent& operator=(RoutedEvent&& other) = delete;
~RoutedEvent() = default;
IEvent<TEventArgs&>* Direct() { return &direct_; }
IEvent<TEventArgs&>* Bubble() { return &bubble_; }
IEvent<TEventArgs&>* Tunnel() { return &tunnel_; }
private:
Event<TEventArgs&> direct_;
Event<TEventArgs&> bubble_;
Event<TEventArgs&> tunnel_;
};
class MouseEventArgs : public UiEventArgs {
public:
MouseEventArgs(Object* sender, Object* original_sender,
const std::optional<Point>& point = std::nullopt)
: UiEventArgs(sender, original_sender), point_(point) {}
MouseEventArgs(const MouseEventArgs& other) = default;
MouseEventArgs(MouseEventArgs&& other) = default;
MouseEventArgs& operator=(const MouseEventArgs& other) = default;
MouseEventArgs& operator=(MouseEventArgs&& other) = default;
~MouseEventArgs() override = default;
// This point is relative to window client lefttop.
Point GetPoint() const { return point_.value_or(Point{}); }
private:
std::optional<Point> point_;
};
class MouseButtonEventArgs : public MouseEventArgs {
public:
MouseButtonEventArgs(Object* sender, Object* original_sender,
const Point& point, const MouseButton button)
: MouseEventArgs(sender, original_sender, point), button_(button) {}
MouseButtonEventArgs(Object* sender, Object* original_sender,
const MouseButton button)
: MouseEventArgs(sender, original_sender), button_(button) {}
MouseButtonEventArgs(const MouseButtonEventArgs& other) = default;
MouseButtonEventArgs(MouseButtonEventArgs&& other) = default;
MouseButtonEventArgs& operator=(const MouseButtonEventArgs& other) = default;
MouseButtonEventArgs& operator=(MouseButtonEventArgs&& other) = default;
~MouseButtonEventArgs() override = default;
MouseButton GetButton() const { return button_; }
private:
MouseButton button_;
};
class MouseWheelEventArgs : public MouseEventArgs {
public:
MouseWheelEventArgs(Object* sender, Object* original_sender,
const Point& point, const float delta)
: MouseEventArgs(sender, original_sender, point), delta_(delta) {}
MouseWheelEventArgs(const MouseWheelEventArgs& other) = default;
MouseWheelEventArgs(MouseWheelEventArgs&& other) = default;
MouseWheelEventArgs& operator=(const MouseWheelEventArgs& other) = default;
MouseWheelEventArgs& operator=(MouseWheelEventArgs&& other) = default;
~MouseWheelEventArgs() override = default;
float GetDelta() const { return delta_; }
private:
float delta_;
};
class PaintEventArgs : public UiEventArgs {
public:
PaintEventArgs(Object* sender, Object* original_sender,
platform::graph::IPainter* painter)
: UiEventArgs(sender, original_sender), painter_(painter) {}
PaintEventArgs(const PaintEventArgs& other) = default;
PaintEventArgs(PaintEventArgs&& other) = default;
PaintEventArgs& operator=(const PaintEventArgs& other) = default;
PaintEventArgs& operator=(PaintEventArgs&& other) = default;
~PaintEventArgs() = default;
platform::graph::IPainter* GetPainter() const { return painter_; }
private:
platform::graph::IPainter* painter_;
};
class FocusChangeEventArgs : public UiEventArgs {
public:
FocusChangeEventArgs(Object* sender, Object* original_sender,
const bool is_window = false)
: UiEventArgs(sender, original_sender), is_window_(is_window) {}
FocusChangeEventArgs(const FocusChangeEventArgs& other) = default;
FocusChangeEventArgs(FocusChangeEventArgs&& other) = default;
FocusChangeEventArgs& operator=(const FocusChangeEventArgs& other) = default;
FocusChangeEventArgs& operator=(FocusChangeEventArgs&& other) = default;
~FocusChangeEventArgs() override = default;
// Return whether the focus change is caused by the window-wide focus change.
bool IsWindow() const { return is_window_; }
private:
bool is_window_;
};
/*
class ToggleEventArgs : public UiEventArgs {
public:
ToggleEventArgs(Object* sender, Object* original_sender, bool new_state)
: UiEventArgs(sender, original_sender), new_state_(new_state) {}
ToggleEventArgs(const ToggleEventArgs& other) = default;
ToggleEventArgs(ToggleEventArgs&& other) = default;
ToggleEventArgs& operator=(const ToggleEventArgs& other) = default;
ToggleEventArgs& operator=(ToggleEventArgs&& other) = default;
~ToggleEventArgs() override = default;
bool GetNewState() const { return new_state_; }
private:
bool new_state_;
};
*/
class KeyEventArgs : public UiEventArgs {
public:
KeyEventArgs(Object* sender, Object* original_sender, int virtual_code)
: UiEventArgs(sender, original_sender), virtual_code_(virtual_code) {}
KeyEventArgs(const KeyEventArgs& other) = default;
KeyEventArgs(KeyEventArgs&& other) = default;
KeyEventArgs& operator=(const KeyEventArgs& other) = default;
KeyEventArgs& operator=(KeyEventArgs&& other) = default;
~KeyEventArgs() override = default;
int GetVirtualCode() const { return virtual_code_; }
private:
int virtual_code_;
};
/*
class CharEventArgs : public UiEventArgs {
public:
CharEventArgs(Object* sender, Object* original_sender, wchar_t c)
: UiEventArgs(sender, original_sender), c_(c) {}
CharEventArgs(const CharEventArgs& other) = default;
CharEventArgs(CharEventArgs&& other) = default;
CharEventArgs& operator=(const CharEventArgs& other) = default;
CharEventArgs& operator=(CharEventArgs&& other) = default;
~CharEventArgs() override = default;
wchar_t GetChar() const { return c_; }
private:
wchar_t c_;
};
*/
} // namespace cru::ui::event
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