widget.hpp

#pragma once
#include "common.hpp"
#include <io/painter.hpp>
#include <io/presser.hpp>
 
namespace bugui
{
template <typename T>
concept has_set = requires(T t)
{
  { t.set() } -> is_void;
};
 
template <typename T>
concept has_paint = requires(T t, painter& p)
{
  { t.paint(p) } -> is_void;
};
 
template <typename T>
concept has_press = requires(T t, presser& p)
{
  { t.on_press(p) } -> is_void;
};
 
template <typename T>
concept has_double_press = requires(T t, presser& p)
{
  { t.on_double_press(p) } -> is_void;
};
 
template <typename T>
concept has_drag = requires(T t, presser& p)
{
  { t.on_drag(p) } -> is_void;
};
 
template <typename T>
concept has_drop = requires(T t, presser& p)
{
  { t.on_drop(p) } -> is_void;
};
 
template <typename T>
concept has_any_press = has_press<T> ||
                        has_double_press<T> ||
                        has_drag<T> ||
                        has_drop<T>;
 
template <typename T>
concept has_held_added = requires(T t)
{
  { t.on_held_added() } -> is_void;
};
 
template <typename T>
concept has_held_removed = requires(T t)
{
  { t.on_held_removed() } -> is_void;
};
 
template <typename T>
concept has_Delete = requires(T t)
{
  { t.on_Delete() } -> is_void;
};
 
template <typename T>
concept has_Shift = requires(T t)
{
  { t.on_Shift() } -> is_void;
};
 
template <typename T>
concept has_child_Delete = requires(T t)
{
  { t.on_child_Delete() } -> is_void;
};
 
} // namespace bugui