code: private void startButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_startButtonActionPerformed
  		_worker = EvolvingImagesWorker.of(getEngineParam(), getImage());
  		_worker.start(this::onNewResult);
  
  		// Enable/Disable UI controls.
  		startButton.setEnabled(false);
  		stopButton.setEnabled(true);
  		pauseButton.setEnabled(true);
  		openButton.setEnabled(false);
  		saveButton.setEnabled(true);
  		engineParamPanel.setEnabled(false);
  	}
docs: </editor-fold>//GEN-END:initComponents