[QGIS-Developer] QgsMapLayerComboBox add None

[Ing. Pierluigi De Rosa]

Dear all,

into the QgsMapLayerComboBox is there a simple way to add the --None--
option for the list of layer?
Normally the widget is already full of all layer but I need also the
option: no layer

What is the best solution to do that?
Thanks
Pierluigi

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Ing. Pierluigi De Rosa 
PhD in Scienze della terra 
Professore a contratto di G.I.S. presso Università di Perugia

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