Wayland: fix interactive moving and resizing of a subwindow - cont'd (#987)

This fix requires to be able to recognize whether Fl_Wayland_Window_Driver::resize() is called
by a resize operation of an encompassing widget or not.
To do that, private static int variable group_resize_depth_ is added to class Fl_Group
and an accessor to this variable is added to class Fl_Window_Driver.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/Fl_Group.cxx b/src/Fl_Group.cxx
index 2576efea7..e6d942e32 100644
--- a/src/Fl_Group.cxx
+++ b/src/Fl_Group.cxx
@@ -809,6 +809,8 @@ int* Fl_Group::sizes()
   return sizes_;
 }
 
+int Fl_Group::group_resize_depth_ = 0;
+
 /**
   Resizes the Fl_Group widget and all of its children.
 
@@ -857,6 +859,7 @@ void Fl_Group::resize(int X, int Y, int W, int H) {
   // Part 2: here we definitely have a resizable() widget, resize children
 
   else if (children_) {
+    group_resize_depth_++;
 
     // get changes in size/position from the initial size:
     dx = X - p->x();
@@ -905,6 +908,7 @@ void Fl_Group::resize(int X, int Y, int W, int H) {
 
       o->resize(L+dx, T+dy, R-L, B-T);
     }
+    group_resize_depth_--;
   } // End of part 2: we have a resizable() widget
 }