package com.vci.client.workflow.template;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.InputStream;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

import com.vci.client.workflow.delegate.ProcessCustomClientDelegate;
import com.vci.client.workflow.template.object.ProcessDefinitionObject;

public class ProcessDefinitionPanel extends JPanel {

	private static final long serialVersionUID = 4377484415817081427L;
	
	private JLabel flowChartLabel;
	
	public ProcessDefinitionPanel() {
		init();
	}

	private void init() {
		flowChartLabel = new JLabel();
		JPanel chartPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
		chartPanel.setBackground(Color.WHITE);
		chartPanel.add(flowChartLabel);
		JScrollPane comp = new JScrollPane(chartPanel);
		
		setLayout(new BorderLayout());
		this.add(comp);
	}

	public void setObject(ProcessDefinitionObject processDefinitionObject) {
		updateFlowChart(processDefinitionObject);
	}
	
	/**
	 * 根据processDefinition刷新流程图
	 * @param processDefinition, 流程定义
	 */
	private void updateFlowChart(ProcessDefinitionObject processDefinitionObject){
		if(processDefinitionObject == null){
			flowChartLabel.setIcon(null);
			return;
		}
		try {
			String deploymentId = processDefinitionObject.getJbpmDeploymentId();
			byte[] jbpmImage = new ProcessCustomClientDelegate().getProcessChart(deploymentId);
			InputStream buffin = new ByteArrayInputStream(jbpmImage, 0, jbpmImage.length);
			BufferedImage bi = ImageIO.read(buffin);
			ImageIcon icon = new ImageIcon(bi);
			flowChartLabel.setIcon(icon);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}