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#pragma once
#include <optional>
namespace cru::ui
{
struct Point
{
constexpr static Point Zero()
{
return Point(0, 0);
}
constexpr Point() = default;
constexpr Point(const float x, const float y) : x(x), y(y) { }
float x = 0;
float y = 0;
};
constexpr bool operator==(const Point& left, const Point& right)
{
return left.x == right.x && left.y == right.y;
}
constexpr bool operator!=(const Point& left, const Point& right)
{
return !(left == right);
}
struct Size
{
constexpr static Size Zero()
{
return Size(0, 0);
}
constexpr Size() = default;
constexpr Size(const float width, const float height) : width(width), height(height) { }
float width = 0;
float height = 0;
};
constexpr Size operator + (const Size& left, const Size& right)
{
return Size(left.width + right.width, left.height + right.height);
}
constexpr Size operator - (const Size& left, const Size& right)
{
return Size(left.width - right.width, left.height - right.height);
}
constexpr bool operator==(const Size& left, const Size& right)
{
return left.width == right.width && left.height == right.height;
}
constexpr bool operator!=(const Size& left, const Size& right)
{
return !(left == right);
}
struct Rect
{
constexpr Rect() = default;
constexpr Rect(const float left, const float top, const float width, const float height)
: left(left), top(top), width(width), height(height) { }
constexpr Rect(const Point& lefttop, const Size& size)
: left(lefttop.x), top(lefttop.y), width(size.width), height(size.height) { }
constexpr static Rect FromVertices(const float left, const float top, const float right, const float bottom)
{
return Rect(left, top, right - left, bottom - top);
}
constexpr float GetRight() const
{
return left + width;
}
constexpr float GetBottom() const
{
return top + height;
}
constexpr Point GetLeftTop() const
{
return Point(left, top);
}
constexpr Point GetRightBottom() const
{
return Point(left + width, top + height);
}
constexpr Size GetSize() const
{
return Size(width, height);
}
constexpr bool IsPointInside(const Point& point) const
{
return
point.x >= left &&
point.x < GetRight() &&
point.y >= top &&
point.y < GetBottom();
}
float left = 0.0f;
float top = 0.0f;
float width = 0.0f;
float height = 0.0f;
};
enum class MouseButton
{
Left,
Right,
Middle
};
struct TextRange
{
constexpr static std::optional<TextRange> FromTwoSides(unsigned first, unsigned second)
{
if (first > second)
return std::make_optional<TextRange>(second, first - second);
if (first < second)
return std::make_optional<TextRange>(first, second - first);
return std::nullopt;
}
constexpr static std::pair<unsigned, unsigned> ToTwoSides(std::optional<TextRange> text_range, unsigned default_position = 0)
{
if (text_range.has_value())
return std::make_pair(text_range.value().position, text_range.value().position + text_range.value().count);
return std::make_pair(default_position, default_position);
}
constexpr TextRange() = default;
constexpr TextRange(const unsigned position, const unsigned count)
: position(position), count(count)
{
}
unsigned position = 0;
unsigned count = 0;
};
bool IsKeyDown(int virtual_code);
bool IsKeyToggled(int virtual_code);
}
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