menu/container: calculate window coordinates

the container have to keep the current window coordinates of its left,
bottom corner, therefor they have to be recalculated on every
size/position change (need virtual functions in DrawableControl)

3 files changed, 74 insertions, 3 deletions

diff --git a/src/menu/container.cpp b/src/menu/container.cpp
index ce73c1c2..3cf8d770 100644
--- a/src/menu/container.cpp
+++ b/src/menu/container.cpp
@@ -91,4 +91,40 @@ namespace usdx
 	{
 		return window_coords;
 	}
+
+	void Container::recalculate_window_coords(void)
+	{
+		if (parent) {
+			assert(parent != NULL);
+			window_coords.set_x(parent->get_width() -
+								(get_left() + get_width()));
+
+			window_coords.set_y(parent->get_height() -
+								(get_top() + get_height()));
+		}
+	}
+
+	void Container::set_position(const Point<int>& position)
+	{
+		DrawableControl::set_position(position);
+		recalculate_window_coords();
+	}
+
+	void Container::set_position(int left, int top)
+	{
+		DrawableControl::set_position(left, top);
+		recalculate_window_coords();
+	}
+
+	void Container::set_size(const Dimension<int>& size)
+	{
+		DrawableControl::set_size(size);
+		recalculate_window_coords();
+	}
+
+	void Container::set_size(int width, int height)
+	{
+		DrawableControl::set_size(width, height);
+		recalculate_window_coords();
+	}
 };
diff --git a/src/menu/container.hpp b/src/menu/container.hpp
index 147a0d92..0fa4803e 100644
--- a/src/menu/container.hpp
+++ b/src/menu/container.hpp
@@ -45,11 +45,18 @@ namespace usdx
 		Frame* frame;
 		std::list<DrawableControl*> controls;
 
+		/**
+		 * Left bottom corner of the container in window coordinats. This is
+		 * used for calculating the window coordinates of the containing
+		 * controls for clipping, that only works with window coordinates.
+		 */
+		Point<int> window_coords;
+		void recalculate_window_coords(void);
+
 	protected:
 		Container(Container*, const ContainerHelper&);
 
 		virtual void draw(void);
-		Point<int> window_coords;
 
 	public:
 		Container(Container*);
@@ -62,6 +69,34 @@ namespace usdx
 		virtual void removeFrame(void);
 
 		const Point<int>& get_window_coords(void) const;
+
+		/**
+		 * Overwritten here to be able to recalculate the window coordinates.
+		 *
+		 * @see window_coords
+		 */
+		virtual void set_position(const Point<int>& position);
+
+		/**
+		 * Overwritten here to be able to recalculate the window coordinates.
+		 *
+		 * @see window_coords
+		 */
+		virtual void set_position(int left, int top);
+
+		/**
+		 * Overwritten here to be able to recalculate the window coordinates.
+		 *
+		 * @see window_coords
+		 */
+		virtual void set_size(const Dimension<int>& size);
+
+		/**
+		 * Overwritten here to be able to recalculate the window coordinates.
+		 *
+		 * @see window_coords
+		 */
+		virtual void set_size(int width, int height);
 	};
 };
 
diff --git a/src/menu/drawable_control.hpp b/src/menu/drawable_control.hpp
index 7f353a5a..261f0514 100644
--- a/src/menu/drawable_control.hpp
+++ b/src/menu/drawable_control.hpp
@@ -77,8 +77,8 @@ namespace usdx
 
 		void repaint(void);
 
-		void set_position(const Point<int>& position);
-		void set_position(int left, int top);
+		virtual void set_position(const Point<int>& position);
+		virtual void set_position(int left, int top);
 
 		const Point<int>& get_position(void) const;
 		int get_left(void) const;