Implement wxComboBox::SetValue() in wxQt

Make setting combobox value work.

include/wx/qt/combobox.h

@@ -69,6 +69,8 @@ public:
     bool IsListEmpty() const { return wxItemContainer::IsEmpty(); }
     bool IsTextEmpty() const { return wxTextEntry::IsEmpty(); }
 
+    virtual void SetValue(const wxString& value) wxOVERRIDE;
+
     virtual void Popup();
     virtual void Dismiss();
 

src/qt/combobox.cpp

@@ -118,6 +118,14 @@ bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
     return QtCreateControl( parent, id, pos, size, style, validator, name );
 }
 
+void wxComboBox::SetValue(const wxString& value)
+{
+    if ( HasFlag(wxCB_READONLY) )
+        SetStringSelection(value);
+    else
+        wxTextEntry::SetValue(value);
+}
+
 wxString wxComboBox::DoGetValue() const
 {
     return wxQtConvertString( m_qtComboBox->currentText() );