pda->dialog = get_widget_assert (xml, "histogram-dialog");
pda->source = get_widget_assert (xml, "dict-view");
act->variable = get_widget_assert (xml, "entry1");
act->curve = get_widget_assert (xml, "curve");
pda->dialog = get_widget_assert (xml, "histogram-dialog");
pda->source = get_widget_assert (xml, "dict-view");
act->variable = get_widget_assert (xml, "entry1");
act->curve = get_widget_assert (xml, "curve");