flowpane.java~159~

flowGUI简单的java图形设计

package com.wiziflow.gui;

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

/**
 * 工作流定义区
 */

public class FlowPane extends JLayeredPane {
  private StartBean start=new StartBean();
  private EndBean end=new EndBean();;
  private ActivityBean activity = null;

  int i=1;
  public FlowPane() {
    super();
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception {
    this.addMouseListener(new java.awt.event.MouseAdapter() {
      public void mousePressed(MouseEvent e) {
        this_mousePressed(e);
      }
    });
  }

  void this_mousePressed(MouseEvent e) {
    switch(Mouse.STATE) {
      case Mouse.NORMAL://普通鼠标
        //如果点中线，弹出对话框
        break;
      case Mouse.ACTIVITY://活动鼠标
        activity=new ActivityBean();
        activity.setText("活动"+i);
        //初始位置在鼠标的周围。鼠标位于中间
        activity.setLocation(e.getX()-activity.getWidth()/2,e.getY()-activity.getHeight()/2);
        add(activity);
        activity.requestFocus();
        Mouse.setState(Mouse.NORMAL);
        i++;
        //开始图标只能有一个。重置鼠标状态
        return;
      case Mouse.START:{//开始鼠标
//        if(b_start) {//“开始”只能有一个
//          //弹出消息框，提示用户开始图标已经有了
//          JLabel message=new JLabel("警告：不能重复加入开始图标！");
//          message.setFont(new java.awt.Font("宋体", 0, 12));
//          JOptionPane.showMessageDialog(this,message);
//          Mouse.setState(Mouse.NORMAL);
//          return;
//        }

        start.setLocation(e.getX()-start.getWidth()/2,e.getY()-start.getHeight()/2);
        add(start);
        start.requestFocus();
        //开始图标只能有一个。重置鼠标状态
//        b_start=true;
        Mouse.setState(Mouse.NORMAL);
        return;
      }
    case Mouse.END:{//结束鼠标
      if(getIndexOf(end)==-1) {//表明该控件仍然没有
      //System.out.println("i="+i);
        end.setLocation(e.getX()-end.getWidth()/2,e.getY()-end.getHeight()/2);
        add(end);
        end.requestFocus();
      }else{
        JLabel message=new JLabel("警告：不能重复加入结束图标！");
        message.setFont(new java.awt.Font("宋体", 0, 12));
        JOptionPane.showMessageDialog(this,message);
      }
      Mouse.setState(Mouse.NORMAL);
      return;
    }

    }
  }
//  public void paint(Graphics g) {
//    //画线
//    super.paint(g);
//  }
}