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)

1 files changed, 36 insertions, 0 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();
+	}
 };