SetSelection() may be used for both single and multi selection listboxes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21139 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/vlbox.tex

@@ -173,6 +173,19 @@ may only return $0$ or $1$ however.
 Get the currently selected item or $-1$ if there is no selection.
 
 
+\membersection{wxVListBox::GetSelectionBackground}\label{wxvlistboxgetselectionbackground}
+
+\constfunc{const wxColour\&}{GetSelectionBackground}{\void}
+
+Returns the background colour used for the selected cells. By default the
+standard system colour is used.
+
+\wxheading{See also}
+
+\helpref{wxSystemSettings::GetColour}{wxsystemsettingsgetcolour},\\
+\helpref{SetSelectionBackground}{wxvlistboxsetselectionbackground}
+
+
 \membersection{wxVListBox::HasMultipleSelection}\label{wxvlistboxishasmultipleselection}
 
 \constfunc{bool}{HasMultipleSelection}{\void}
@@ -321,6 +334,21 @@ Set the selection to the specified item, if it is $-1$ the selection is
 unset. The selected item will be automatically scrolled into view if it isn't
 currently visible.
 
+This method may be used both with single and multiple selection listboxes.
+
+
+\membersection{wxVListBox::SetSelectionBackground}\label{wxvlistboxsetselectionbackground}
+
+\func{void}{SetSelectionBackground}{\param{const wxColour\& }{col}}
+
+Sets the colour to be used for the selected cells background. The background of
+the standard cells may be changed by simply calling 
+\helpref{SetBackgroundColour}{wxwindowsetbackgroundcolour}.
+
+\wxheading{See also}
+
+\helpref{GetSelectionBackground}{wxvlistboxgetselectionbackground}
+
 
 \membersection{wxVListBox::Toggle}\label{wxvlistboxtoggle}
 

src/generic/vlbox.cpp

@@ -249,8 +249,11 @@ void wxVListBox::SetSelection(int selection)
                   (selection >= 0 && (size_t)selection < GetItemCount()),
                   _T("wxVListBox::SetSelection(): invalid item index") );
 
-    wxASSERT_MSG( !HasMultipleSelection(),
-                  _T("SetSelection() is invalid with multiselection listbox") );
+    if ( HasMultipleSelection() )
+    {
+        Select(selection);
+        m_anchor = selection;
+    }
 
     DoSetCurrent(selection);
 }