bean.java

flowGUI简单的java图形设计

package com.wiziflow.gui;

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.awt.font.*;
import java.util.*;
/**
 * 活动图标。定义“活动”中的所有属性
 */
public class Bean extends JLabel {
  //private ImageIcon icon = new ImageIcon(com.wiziflow.gui.StartBean.class.getResource("images/activity.gif"));
  private LineBean line = null;
  private Vector vector = new Vector();
  private int mouseX=0;//鼠标移动的前一个位置的x坐标
  private int mouseY=0;//鼠标移动的前一个位置的y坐标
  private boolean lineMouseExit=false;//当鼠标移出控件时开始画

  public Bean() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  private void jbInit() throws Exception {
    //this.setIcon(icon);
    this.setFont(new Font("宋体",0,12));
    this.setSize(50,65);//图标大小
    this.setVerticalTextPosition(JLabel.BOTTOM);
    this.setHorizontalAlignment(JLabel.CENTER);//全部居中
    this.setHorizontalTextPosition(JLabel.CENTER);
    this.addKeyListener(new java.awt.event.KeyAdapter() {
      public void keyReleased(KeyEvent e) {
        this_keyReleased(e);
      }
    });

    this.addFocusListener(new java.awt.event.FocusAdapter() {
      public void focusGained(FocusEvent e) {
        this_focusGained(e);
      }
      public void focusLost(FocusEvent e) {
        this_focusLost(e);
      }
    });
    this.addMouseListener(new java.awt.event.MouseAdapter() {
      public void mousePressed(MouseEvent e) {
        this_mousePressed(e);
      }
      public void mouseEntered(MouseEvent e) {
        this_mouseEntered(e);
      }
      public void mouseExited(MouseEvent e) {
        this_mouseExited(e);
      }
      public void mouseReleased(MouseEvent e) {
        this_mouseReleased(e);
      }
    });
    this.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
      public void mouseDragged(MouseEvent e) {
        this_mouseDragged(e);
      }
    });
  }


  void this_mouseDragged(MouseEvent e) {
    Point p = this.getLocation();
    int x=(int)p.getX();
    int y=(int)p.getY();

    if(Mouse.STATE==Mouse.LINE ) {//画线模式
      //鼠标拖动，移出图标区时开始画线，传递坐标值为相对startBean的坐标
      if(lineMouseExit) {
        line.firePropertyChange("x",e.getY(),e.getX());
      }
      return;
    }
    if(Mouse.STATE!=Mouse.LINE && line!=null) {
      line.firePropertyChange("x",e.getY(),e.getX());
    }
    this.setLocation(x+(e.getX()-mouseX),y+(e.getY()-mouseY));
  }

  void this_mousePressed(MouseEvent e) {
    if(Mouse.STATE==Mouse.LINE) {//画线模式
      //添加LineBean到FlowPane，但不进行任何计算
      line = new LineBean();
      ((JLayeredPane)getParent()).add(line);
      ((JLayeredPane)getParent()).moveToBack(line);
      line.setStartComponent(this);
      vector.add(line);
      return;
    }
    mouseX=e.getX();
    mouseY=e.getY();
    this.requestFocus();
    //如果是左键双击，并且鼠标正常状态
    //双击图标弹出属性编辑框
    //双击文字弹出文字编辑框
    if(e.getClickCount()==2 && SwingUtilities.isLeftMouseButton(e)){
      //this.add(new javax.swing.JTextField());
      //this.setText("哈哈阿瑟扩大军方");
      showPropertyDialog();
    }
  }

  void this_focusGained(FocusEvent e) {
    ((JLayeredPane)getParent()).moveToFront(this);
    this.setBorder(BorderFactory.createLineBorder(Color.blue));
  }

  void this_focusLost(FocusEvent e) {
    //this.setSize(icon.getIconWidth()+getText().length(),icon.getIconHeight()+35);
    this.setBorder(null);
  }

  void this_keyReleased(KeyEvent e) {
    if(e.getKeyCode()==127) {//Delete键
      JLabel message=new JLabel("删除该控件和它的所有关系,确定吗?");
      message.setFont(new java.awt.Font("宋体", 0, 12));
      int i=JOptionPane.showConfirmDialog(null,message,"删除",JOptionPane.OK_CANCEL_OPTION);
      if(i==0) {//确定
        //为什么要用super
        //是否因为加入控件时，都是Bean的子类？
        JLayeredPane flowPane = (JLayeredPane)getParent();
        //删除线
        if(!vector.isEmpty()){
          Iterator iter = vector.iterator();
          while(iter.hasNext()) {
            LineBean lineBean = (LineBean)iter.next();
            flowPane.remove(lineBean);
          }
        }
        //flowPane.getComponentAt(line);//删除连接线
        //line=null;
//        flowPane.removeAll();
        flowPane.remove(this);
        flowPane.repaint();
//        this.removeAll();
      }
    }
  }

  void this_mouseEntered(MouseEvent e) {
    if(Mouse.STATE==Mouse.LINE){//画线模式
      this.setBorder(BorderFactory.createLineBorder(Color.red));
      lineMouseExit=false;
    }
  }

  void this_mouseExited(MouseEvent e) {
    if(Mouse.STATE==Mouse.LINE){//画线模式
      this.setBorder(null);
      lineMouseExit=true;
    }
  }
  //鼠标释放才表明画线结束。如果鼠标释放时，没有在另一个Bean上面，表明画线失败
  void this_mouseReleased(MouseEvent e) {
    //e.getX是相对于事件源坐标而言，所以要转换成绝对坐标
    if(Mouse.STATE == Mouse.LINE) {
      JLayeredPane flowPane = (JLayeredPane)getParent();
      Bean bean = null;
      try{
        bean = (Bean)flowPane.findComponentAt(e.getX()+this.getX(),e.getY()+this.getY());
      }catch(Exception ex) {
      }
      if(bean!=null) {
        //System.out.println( bean.getText());
        //判断鼠标时是否是同一个对象。如果是同一个对象，也就没有意义，建议FlowPane去掉LineBean对象
        if(this.hashCode()==bean.hashCode()) {//根据hashCode能判断出来吗？
          line.remove();
        }else{
          //不是同一个对象
          line.setEndComponent(bean);
          //线画完之后，它既是起点Bean的，也是终点Bean的
          //但我实在想不通，好多线交会在一个bean的时候，居然行的通。
          bean.line = line;
          bean.vector.add(line);
          line.repaint();
        }
      }else{
        //如果是null，没有意义，建议FlowPane去掉LineBean对象
        //System.out.println("null");
        line.remove();
      }
    }
  }
  //弹出属性对话框，需要继承的类予以改写
  protected void showPropertyDialog(){
    System.out.println("showPropertyDialog()");
  }
}