final ScalingControl scaler = new CrossoverScalingControl();
jBtnZoomPlus.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
VisualizationViewer vv = _parent.getMap().getVV(_parent.getNameSelectedTab());
if (scaler != null && vv != null)
scaler.scale(vv, 1.1f, vv.getCenter());
}
});
jBtnZoomMinus.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {