private void btnSterMysza1ItemStateChanged(java.awt.event.ItemEvent evt) {//GEN-FIRST:event_btnSterMysza1ItemStateChanged
        if (btnSterMysza1.isSelected()) {
            btnSterMysza3.setSelected(false);
            if (ptr != null)ptr.addMouseListener(mlobs);
        }
        else{
            if (ptr != null)ptr.removeMouseListener(mlobs);
        }
    }