public void on_mnuMemos_show(object o, EventArgs e)
{
if (selectedMemo != null) {
mnuViewMemo.Sensitive = true;
if (Core.IsLocalNode(selectedMemo.Node)) {
mnuEditMemo.Sensitive = true;
mnuDeleteMemo.Sensitive = true;
} else {
mnuEditMemo.Sensitive = false;
mnuDeleteMemo.Sensitive = false;
}
} else {
mnuViewMemo.Sensitive = false;
mnuEditMemo.Sensitive = false;
mnuDeleteMemo.Sensitive = false;
}
}