if ((style & SWT.SINGLE) != 0) return;
public void selectAll () {	checkWidget();	int selection = OS.gtk_tree_view_get_selection (handle);	OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED);	OS.gtk_tree_selection_select_all (OS.gtk_tree_view_get_selection (handle));	OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED);}