Update and improve "Hello world" example in the documentation.

[wxWidgets.git] / src / common / sizer.cpp

diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index 535cae56c5bbea3a2d8e23e4f90cd7573a61b5ff..129191551563cdc12b2d00fe4bb7bb20bfce4e05 100644 (file)
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -840,6 +840,10 @@ bool wxSizer::Replace( size_t old, wxSizerItem *newitem )
 
     wxSizerItem *item = node->GetData();
     node->SetData(newitem);
+
+    if (item->IsWindow() && item->GetWindow())
+        item->GetWindow()->SetContainingSizer(NULL);
+
     delete item;
 
     return true;
@@ -1319,6 +1323,7 @@ wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
       m_vgap( vgap ),
       m_hgap( hgap )
 {
+    wxASSERT(cols >= 0);
 }
 
 wxGridSizer::wxGridSizer( int cols, const wxSize& gap )
@@ -1327,6 +1332,7 @@ wxGridSizer::wxGridSizer( int cols, const wxSize& gap )
       m_vgap( gap.GetHeight() ),
       m_hgap( gap.GetWidth() )
 {
+    wxASSERT(cols >= 0);
 }
 
 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
@@ -1335,6 +1341,7 @@ wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
       m_vgap( vgap ),
       m_hgap( hgap )
 {
+    wxASSERT(rows >= 0 && cols >= 0);
 }
 
 wxGridSizer::wxGridSizer( int rows, int cols, const wxSize& gap )
@@ -1343,6 +1350,7 @@ wxGridSizer::wxGridSizer( int rows, int cols, const wxSize& gap )
       m_vgap( gap.GetHeight() ),
       m_hgap( gap.GetWidth() )
 {
+    wxASSERT(rows >= 0 && cols >= 0);
 }
 
 wxSizerItem *wxGridSizer::DoInsert(size_t index, wxSizerItem *item)