Hello, now that was a weird bug! I was experiencing crashes when I had changed the panel size via the right mouse on the search button. The problem is that FltkWidgetView::prepareCreateFltkWidget() was calling fltk::Group::begin(). Therefore after visiting pages with forms, the newly created panel was getting a child of Main instead of TopGroup! Btw. did I mention that this fltk begin()/end() stuff is evil? One could expect that Group::replace() should disconnect the new widget properly from its old parent (if there is any). But that's not the case. I wrote a mail to fltk.general about this. So in the end Main still had a reference to the panel and once it was deleted -- bang. The patch below uses Group::add() directly in FltkWidgetView::addFltkWidget() instead of FltkWidgetView::prepareCreateFltkWidget(). Does anyone remember why FltkWidgetView::prepareCreateFltkWidget() was added in the first place? Cheers, Johannes diff --git a/dw/fltkplatform.cc b/dw/fltkplatform.cc --- a/dw/fltkplatform.cc +++ b/dw/fltkplatform.cc @@ -83,10 +83,6 @@ FltkColor::FltkColor (int color, core::s colors[SHADING_DARK] = shadeColor (color, SHADING_DARK) << 8; colors[SHADING_LIGHT] = shadeColor (color, SHADING_LIGHT) << 8; } -} - -void FltkView::prepareCreateFltkWidget () -{ } void FltkView::addFltkWidget (::fltk::Widget *widget, diff --git a/dw/fltkplatform.hh b/dw/fltkplatform.hh --- a/dw/fltkplatform.hh +++ b/dw/fltkplatform.hh @@ -40,7 +40,6 @@ public: public: virtual bool usesFltkWidgets () = 0; - virtual void prepareCreateFltkWidget (); virtual void addFltkWidget (::fltk::Widget *widget, core::Allocation *allocation); virtual void removeFltkWidget (::fltk::Widget *widget); diff --git a/dw/fltkui.cc b/dw/fltkui.cc --- a/dw/fltkui.cc +++ b/dw/fltkui.cc @@ -103,7 +103,6 @@ void FltkResource::attachView (FltkView ViewAndWidget *viewAndWidget = new ViewAndWidget(); viewAndWidget->view = view; - view->prepareCreateFltkWidget (); viewAndWidget->widget = createNewWidget (&allocation); viewAndWidget->view->addFltkWidget (viewAndWidget->widget, &allocation); viewsAndWidgets->append (viewAndWidget); diff --git a/dw/fltkviewbase.cc b/dw/fltkviewbase.cc --- a/dw/fltkviewbase.cc +++ b/dw/fltkviewbase.cc @@ -375,17 +375,12 @@ bool FltkWidgetView::usesFltkWidgets () return true; } - -void FltkWidgetView::prepareCreateFltkWidget () -{ - begin (); -} - void FltkWidgetView::addFltkWidget (::fltk::Widget *widget, core::Allocation *allocation) { canvasWidgets->append (new TypedPointer < ::fltk::Widget> (widget)); allocateFltkWidget (widget, allocation); + add (widget); } void FltkWidgetView::removeFltkWidget (::fltk::Widget *widget) diff --git a/dw/fltkviewbase.hh b/dw/fltkviewbase.hh --- a/dw/fltkviewbase.hh +++ b/dw/fltkviewbase.hh @@ -82,7 +82,6 @@ public: int x, int y, int width, int height); bool usesFltkWidgets (); - void prepareCreateFltkWidget (); void addFltkWidget (::fltk::Widget *widget, core::Allocation *allocation); void removeFltkWidget (::fltk::Widget *widget); void allocateFltkWidget (::fltk::Widget *widget,