Return correct index from wxGenericListCtrl::InsertColumn().

It used to always return 0 in the generic version, return the correct index of
the newly inserted column now.

Closes #13677.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71971 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -565,6 +565,7 @@ All (GUI):
 - Added wxDataViewListCtrl::GetItemCount() (Kry).
 - Added support for Korean Johab and Vietnamese encodings (jank9201).
 - Fix off by 1 bug with setting font size in points in wxHTML (gevorg).
+- Fix return value of wxGenericListCtrl::InsertColumn() (Sebastian Walderich).
 
 GTK:
 

include/wx/generic/private/listctrl.h

@@ -644,7 +644,7 @@ public:
     long FindItem( const wxPoint& pt );
     long HitTest( int x, int y, int &flags ) const;
     void InsertItem( wxListItem &item );
-    void InsertColumn( long col, const wxListItem &item );
+    long InsertColumn( long col, const wxListItem &item );
     int GetItemWidthWithImage(wxListItem * item);
     void SortItems( wxListCtrlCompare fn, wxIntPtr data );
 

src/generic/listctrl.cpp

@@ -4125,8 +4125,10 @@ void wxListMainWindow::InsertItem( wxListItem &item )
     RefreshLines(id, GetItemCount() - 1);
 }
 
-void wxListMainWindow::InsertColumn( long col, const wxListItem &item )
+long wxListMainWindow::InsertColumn( long col, const wxListItem &item )
 {
+    long idx = -1;
+
     m_dirty = true;
     if ( InReportView() )
     {
@@ -4143,9 +4145,11 @@ void wxListMainWindow::InsertColumn( long col, const wxListItem &item )
                 node = m_columns.Item( col );
             m_columns.Insert( node, column );
             m_aColWidths.Insert( colWidthInfo, col );
+            idx = col;
         }
         else
         {
+            idx = m_aColWidths.GetCount();
             m_columns.Append( column );
             m_aColWidths.Add( colWidthInfo );
         }
@@ -4167,6 +4171,7 @@ void wxListMainWindow::InsertColumn( long col, const wxListItem &item )
         // invalidate it as it has to be recalculated
         m_headerWidth = 0;
     }
+    return idx;
 }
 
 int wxListMainWindow::GetItemWidthWithImage(wxListItem * item)
@@ -4947,14 +4952,14 @@ long wxGenericListCtrl::DoInsertColumn( long col, const wxListItem &item )
 {
     wxCHECK_MSG( InReportView(), -1, wxT("can't add column in non report mode") );
 
-    m_mainWin->InsertColumn( col, item );
+    long idx = m_mainWin->InsertColumn( col, item );
 
     // NOTE: if wxLC_NO_HEADER was given, then we are in report view mode but
     //       still have m_headerWin==NULL
     if (m_headerWin)
         m_headerWin->Refresh();
 
-    return 0;
+    return idx;
 }
 
 bool wxGenericListCtrl::ScrollList( int dx, int dy )