Deselect all items in wxQt wxListBox::SetSelection(wxNOT_FOUND)

Follow wxWidgets API convention in wxQt too.

include/wx/qt/listbox.h

@@ -90,6 +90,8 @@ protected:
 private:
     virtual void Init(); //common construction
 
+    void UnSelectAll();
+
     wxDECLARE_DYNAMIC_CLASS(wxListBox);
 };
 

src/qt/listbox.cpp

@@ -182,6 +182,12 @@ void wxListBox::DoSetFirstItem(int WXUNUSED(n))
 
 void wxListBox::DoSetSelection(int n, bool select)
 {
+    if ( n == wxNOT_FOUND )
+    {
+        UnSelectAll();
+        return;
+    }
+
     return m_qtListWidget->setCurrentRow(n, select ? QItemSelectionModel::Select : QItemSelectionModel::Deselect );
 }
 
@@ -248,3 +254,12 @@ QScrollArea *wxListBox::QtGetScrollBarsContainer() const
 {
     return (QScrollArea *) m_qtListWidget;
 }
+
+void wxListBox::UnSelectAll()
+{
+    for ( unsigned int i = 0; i < GetCount(); ++i )
+    {
+        if ( IsSelected(i) )
+            DoSetSelection(i, false);
+    }
+}