void nsViewManager::ReparentChildWidgets(nsIView* aView, nsIWidget *aNewWidget)
{
NS_PRECONDITION(aNewWidget, "");
if (aView->HasWidget()) {
// Check to see if the parent widget is the
// same as the new parent. If not then reparent
// the widget, otherwise there is nothing more
// to do for the view and its descendants
nsIWidget* widget = aView->GetWidget();
nsIWidget* parentWidget = widget->GetParent();
if (parentWidget) {
// Child widget
if (parentWidget != aNewWidget) {
#ifdef DEBUG
nsresult rv =
#endif
widget->SetParent(aNewWidget);
NS_ASSERTION(NS_SUCCEEDED(rv), "SetParent failed!");
}
} else {
// Toplevel widget (popup, dialog, etc)
widget->ReparentNativeWidget(aNewWidget);
}
return;
}
// Need to check each of the views children to see
// if they have a widget and reparent it.
nsView* view = static_cast<nsView*>(aView);
for (nsView *kid = view->GetFirstChild(); kid; kid = kid->GetNextSibling()) {
ReparentChildWidgets(kid, aNewWidget);
}
}
void nsViewManager::ReparentWidgets(nsView* aView, nsView *aParent)
{
NS_PRECONDITION(aParent, "Must have a parent");
NS_PRECONDITION(aView, "Must have a view");
// Quickly determine whether the view has pre-existing children or a
// widget. In most cases the view will not have any pre-existing
// children when this is called. Only in the case
// where a view has been reparented by removing it from
// a reinserting it into a new location in the view hierarchy do we
// have to consider reparenting the existing widgets for the view and
// it's descendants.
if (aView->HasWidget() || aView->GetFirstChild()) {
nsIWidget* parentWidget = aParent->GetNearestWidget(nullptr);
if (parentWidget) {
ReparentChildWidgets(aView, parentWidget);
return;
}
NS_WARNING("Can not find a widget for the parent view");
}
}
