Allow children of gui_container be resized anytime

So far, their position inside the container was determined when
initializing the interface. However, if a child were resized
afterwards, the container would not adjust its elements accordingly.
Moreover, the implementation for gui_container relied on hacking the
children's X/Y coordinates, which could only be done once.

Now, two additional members have been added to gui_common so that
specific X/Y offset can be determined by the parent, additionally to the
traditional rules followed by gui_coords. Despite the extra memory
footprint, it now allows containers to set specific X/Y offsets for
their children on every game cycle.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gui/inc/gui.h b/src/gui/inc/gui.h
index 18ed37b..84a6c66 100644
--- a/src/gui/inc/gui.h
+++ b/src/gui/inc/gui.h
@@ -21,7 +21,7 @@ struct gui_common
         void (*get_dim)(const struct gui_common *, short *w, short *h);
     } *cb;
 
-    short x, y;
+    short x, y, xoff, yoff;
     bool hcentered, vcentered;
     struct gui_common *parent, *child, *sibling;
 };