* @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
*/
public void actionPerformed(ActionEvent e1) {
try {
Workflow workflow = engine.getWorkflow();
XBayaExecutionState executionState = workflow.getExecutionState();
if(executionState == XBayaExecutionState.RUNNING ||
executionState == XBayaExecutionState.STEP){
workflow.setExecutionState(XBayaExecutionState.PAUSED);
play.setIcon(PLAY_ICON);
}else if(executionState == XBayaExecutionState.PAUSED){