utils/rectangle: add + and =+ operator to move rectangle

Points could be added to rectangles and moves the rectangle by this
amount.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/utils/rectangle.hpp b/src/utils/rectangle.hpp
index 7297cf47..5ea2787f 100644
--- a/src/utils/rectangle.hpp
+++ b/src/utils/rectangle.hpp
@@ -144,6 +144,25 @@ namespace usdx
 
 			return result;
 		}
+
+		const Rectangle<T> operator+(const Point<T>& offset)
+		{
+			Rectangle<T> tmp(*this);
+			tmp += offset;
+			return tmp;
+		}
+
+		Rectangle<T>& operator+=(const Point<T>& offset)
+		{
+			T height = this->get_height();
+			T width = this->get_width();
+			T left = this->get_left() + offset.get_x();
+			T top = this->get_top() + offset.get_y();
+
+			this->point1 = Point<T>(left, top);
+			this->point2 = Point<T>(left + width, top + height);
+			return *this;
+		}
 	};
 };