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#pragma once
#include "Point.h"
#include "Size.h"
class Rect {
public:
Rect() { }
Rect(int x, int y, int width, int height)
: m_location(x, y)
, m_size(width, height)
{
}
Rect(const Point& location, const Size& size)
: m_location(location)
, m_size(size)
{
}
bool is_empty() const
{
return width() == 0 || height() == 0;
}
void moveBy(int dx, int dy)
{
m_location.moveBy(dx, dy);
}
void moveBy(const Point& delta)
{
m_location.moveBy(delta);
}
Point center() const
{
return { x() + width() / 2, y() + height() / 2 };
}
void inflate(int w, int h)
{
setX(x() - w / 2);
setWidth(width() + w);
setY(y() - h / 2);
setHeight(height() + h);
}
void shrink(int w, int h)
{
setX(x() + w / 2);
setWidth(width() - w);
setY(y() + h / 2);
setHeight(height() - h);
}
bool contains(int x, int y) const
{
return x >= m_location.x() && x < right() && y >= m_location.y() && y < bottom();
}
bool contains(const Point& point) const
{
return contains(point.x(), point.y());
}
int left() const { return x(); }
int right() const { return x() + width() - 1; }
int top() const { return y(); }
int bottom() const { return y() + height() - 1; }
void setLeft(int left)
{
setWidth(x() - left);
setX(left);
}
void setTop(int top)
{
setHeight(y() - top);
setY(top);
}
bool intersects(const Rect& other) const
{
return left() <= other.right()
&& other.left() <= right()
&& top() <= other.bottom()
&& other.top() <= bottom();
}
int x() const { return location().x(); }
int y() const { return location().y(); }
int width() const { return m_size.width(); }
int height() const { return m_size.height(); }
void setX(int x) { m_location.setX(x); }
void setY(int y) { m_location.setY(y); }
void setWidth(int width) { m_size.setWidth(width); }
void setHeight(int height) { m_size.setHeight(height); }
Point location() const { return m_location; }
Size size() const { return m_size; }
bool operator==(const Rect& other) const
{
return m_location == other.m_location
&& m_size == other.m_size;
}
void intersect(const Rect&);
static Rect intersection(const Rect& a, const Rect& b)
{
Rect r(a);
r.intersect(b);
return a;
}
private:
Point m_location;
Size m_size;
};
inline void Point::constrain(const Rect& rect)
{
if (x() < rect.left())
setX(rect.left());
else if (x() > rect.right())
setX(rect.right());
if (y() < rect.top())
setY(rect.top());
else if (y() > rect.bottom())
setY(rect.bottom());
}
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