FLUID: Fixes issues when pasting widget into Fl_Flex #809

* new virtual function layout_widget() to inform parents after
all children were added

1 files changed, 7 insertions, 0 deletions

diff --git a/fluid/Fl_Type.h b/fluid/Fl_Type.h
index 28611fb90..7e2072228 100644
--- a/fluid/Fl_Type.h
+++ b/fluid/Fl_Type.h
@@ -195,6 +195,13 @@ public:
   virtual void move_child(Fl_Type*, Fl_Type* beforethis) { }
   virtual void remove_child(Fl_Type*) { }
 
+  /** Give widgets a change to arrange their children after all children were add.
+   If adding individual children, this is called immediately, but if children
+   are read via a project file, we wait until all children are read and then
+   lay out the group.
+   */
+  virtual void layout_widget() { }
+
   static Fl_Type *current;  // most recently picked object
   static Fl_Type *current_dnd;