Don't show empty sizers.

Revert the change of r44514 and do hide the empty sizers. Code relying on them
being shown/positioned should use wxRESERVE_SPACE_EVEN_IF_HIDDEN flag but
assuming it by default results in completely unexpected layouts, e.g. still
using margins around a sizer with hidden window if it contains an empty
sub-sizer.

Closes #11426.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65079 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index badc6724abbe1dc33b52c1b435c9935328767ec2..a6b6b4920bb7c5ae2359791f6f4536064e989aa5 100644 (file)
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -585,20 +585,13 @@ bool wxSizerItem::IsShown() const
             // arbitrarily decide that if at least one of our elements is
             // shown, so are we (this arbitrariness is the reason for
             // deprecating this function)
+            for ( wxSizerItemList::compatibility_iterator
+                    node = m_sizer->GetChildren().GetFirst();
+                  node;
+                  node = node->GetNext() )
             {
-                // Some apps (such as dialog editors) depend on an empty sizer still
-                // being laid out correctly and reporting the correct size and position.
-                if (m_sizer->GetChildren().GetCount() == 0)
+                if ( node->GetData()->IsShown() )
                     return true;
-
-                for ( wxSizerItemList::compatibility_iterator
-                        node = m_sizer->GetChildren().GetFirst();
-                      node;
-                      node = node->GetNext() )
-                {
-                    if ( node->GetData()->IsShown() )
-                        return true;
-                }
             }
             return false;