designpanel.java

这是自定义工作流的图形定义部分

//本面板分为左中右三个部分从左至右分别为 RegisteredClassPane、designScrollPane、propertyEdit；

import com.borland.jbcl.layout.XYConstraints;
import com.borland.jbcl.layout.XYLayout;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.URL;
import java.util.*;

/**
 * Title:        work-flow
 * Description:
 * Copyright:    Copyright (c) 2002
 * Company:      CSU
 * @author 	     smallbeetle
 * @version 1.0
 */

public class DesignPanel extends JPanel implements MouseListener, MouseMotionListener, KeyListener{
  static HashMap carriers;
  static HashMap connectors;
  static String mouseOrient = "";
  DeviceCarrier selectedCarrier;
  DeviceCarrier mouseSelectedCarrier=null;
  DeviceConnector selectedConnecor;
  String mouseStatus = null;
  boolean mouseGetIn = false;
  boolean yFlag = false;
  int width,height;
  XYLayout paneLayout = new XYLayout(2000, 5000);
  XYConstraints canvasConstraints = new XYConstraints(0, 0, 2000, 5000);
  RegisteredClassPane registeredClassPane = new RegisteredClassPane();       //显示树形结构的面板
//  PropertyEdit propertyEdit = new PropertyEdit(this);
  DrawCanvas drawCanvas = new DrawCanvas();

  private MainWindow mainWindow;
  private JSplitPane jSplitPane1 = new JSplitPane();
  private JSplitPane jSplitPane2 = new JSplitPane();
  private JScrollPane designScrollPane;
  private Graphics canvasG;

  private String dragAction = "";
  private Point oldLocation = new Point(0, 0);
  private DeviceConnector tConnector;
  private Point hotLeadArea;
  private boolean editable = true;

  private File workFile;   //used to save the experiment.

  public DesignPanel(MainWindow pMainWindow) {
    try {
      jbInit(pMainWindow);
    }
    catch(Exception ex) {
      ex.printStackTrace();
    }
  }

//user wan to start a new experiment.we will clear the experiment.

//when user use the same device for more times, we must give the device a new name
  private String newName(String pref){
    if(pref == null) pref = "";
    int i = 0;
    while(this.carriers.get(pref+i) != null || this.connectors.get(pref+i) != null){
      i++;
    }
    return pref+i;
  }

//
  private String getFile(){
    ComboBoxModel model = new DefaultComboBoxModel();
    String msg = "输入文件的internet地址（URL）";
    JComboBox cb = new JComboBox(model);
    return "";
  }

/*  public void saveExperimentAs(){
    workFile = null;
    try{
      saveExperiment();
    }catch(Exception ex){
    }
  }         */

  //open new experiment
  public void loadExperiment(){
  }

  public synchronized boolean getEditable(){
    return editable;
  }

  public  synchronized  void setEditable(boolean newEditable){
    editable = newEditable;
  }

  public void setPaneSize(int width, int height) throws IllegalArgumentException{
    if (width > 65535 || width < 1000 || height < 1000 || height > 65535){
      throw new IllegalArgumentException("illegal arguments");
    }else{
      this.paneLayout.setHeight(height);
      this.paneLayout.setWidth(width);
      this.canvasConstraints.setHeight(height) ;
      this.canvasConstraints.setWidth(width);
    }
  }

  public void mousePressed(MouseEvent e){
    this.setSelected(e.getPoint(), true) ;
    if (e.getModifiers()==MouseEvent.BUTTON3_MASK) {
        dragAction="";
        setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
        tConnector=null;
    }
    if (mouseStatus!=null &&  mouseStatus.equals("hand_cursor") && (e.getModifiers()==MouseEvent.BUTTON1_MASK)){
           ClassNode node = registeredClassPane.getSelectedNode();
           if (node!=null && node.name.equals("Connector") && mouseGetIn){
                tConnector = new DeviceConnector();
                tConnector.connectorStatus="tConnector";
                Point[] handler = tConnector.getHandler() ;
                for (int i = 0; i < handler.length; i++){
                     handler[i] = new Point(this.selectedCarrier.getX()+this.selectedCarrier.getWidth()/4, this.selectedCarrier.getY()+this.selectedCarrier.getHeight());
                }
                yFlag = true;
                tConnector.setInDeviceCarrierName(this.mouseSelectedCarrier.getName()) ;
                this.selectedCarrier = null;
                tConnector.setSelected(false);
                dragAction = "AddConnector";
                setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
                setSelected(e.getPoint(), false);
           }
           if (node!=null && !node.name.equals("Connector"))  addCarrier(node.name, e.getPoint());
                else  setSelected(e.getPoint(), false);
           this.drawCanvas.repaint();
    }
    else{
      if (this.selectedConnecor!= null ){
        Point[] handler = this.selectedConnecor.getHandler();
        Point h1  = this.selectedConnecor.getHandler(e.getPoint());
        if (h1 != null){
          dragAction = "MoveConnector";
          setCursor(Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR));
          return;
        }
      }
      if (this.selectedCarrier != null){
        oldLocation.setLocation(e.getPoint());
        setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
        dragAction = "MoveCarrier";
      }
    }
    mouseStatus = "null";   //将鼠标地标志设为空，表示已经退出了添加控件的状态
  }

  public void mouseClicked(MouseEvent e){
        mainWindow.setStatus(e.getPoint().toString() );
  }

//show the message in the status bar
  public void mouseMoved(MouseEvent e){
     if (mouseStatus!=null && mouseStatus.equals("hand_cursor")){
        ClassNode node = registeredClassPane.getSelectedNode();
        if (node!=null && node.name.equals("Connector")){
            Set entries = carriers.entrySet();
            Iterator iterator =entries.iterator();
            this.hotLeadArea = null;
            mouseGetIn = false;
            while(iterator.hasNext()){
                Map.Entry entry = (Map.Entry)iterator.next();
                DeviceCarrier carrier = (DeviceCarrier) entry.getValue();
                int x =carrier.getX();
                int y =carrier.getY();
                Point temp = new Point(e.getPoint());
                width = carrier.getWidth();
                height = carrier.getHeight();
                if (Intersect.isIntersect(temp,new Rectangle(x,y,width,height)))  {
                    this.hotLeadArea = new Point(x-2,y-2);
                    this.mouseSelectedCarrier= carrier;
                    mouseGetIn = true;
                    drawCanvas.repaint() ;
                    return;
                }
            }
        }
       return;
     }
  }
  private void moveConnector(MouseEvent e){
    Point[] ha1 = this.selectedConnecor.getHandler();
    int y1 = e.getY();
      ha1[1].y = y1;
      ha1[2].y = y1;
      this.drawCanvas.repaint();
    return;
  }

  private void moveCarrier(MouseEvent e){
    int offsetX = oldLocation.x - e.getX() ; //要移动地相对距离
    int offsetY = oldLocation.y - e.getY() ;
    if (offsetY<0) mouseOrient = "south";
      else mouseOrient = "north";
    int x =  this.selectedCarrier.getX() - offsetX;
    int y = this.selectedCarrier.getY() - offsetY;
    if (x < 0 || y < 0 || x > drawCanvas.getWidth()  - this.selectedCarrier.getWidth() || y > drawCanvas.getHeight()  - this.selectedCarrier.getHeight())
      return;

    Set entries = connectors.entrySet();
    Iterator iterator = entries.iterator() ;
    DeviceConnector connector;

    while (iterator.hasNext()){
      Map.Entry entry = (Map.Entry)iterator.next();
      connector =(DeviceConnector)entry.getValue();
      if (connector.getInDeviceCarrierName().equals(this.selectedCarrier.getName())){
        Point[] handler = connector.getHandler();
        if (handler[0].y<handler[3].y){
            handler[0] = new Point(handler[0].x - offsetX, handler[0].y - offsetY);
            int y12 = handler[0].y + 10 > handler[1].y  ?  handler[0].y + 10 : handler[1].y ;
            handler[1] = new Point(handler[0].x, y12);
            handler[2] = new Point(handler[3].x, y12);
        } else{
            handler[0] = new Point(handler[0].x - offsetX, handler[0].y - offsetY);
            int y12 = handler[0].y - 10 < handler[1].y  ?  handler[0].y - 10 : handler[1].y ;
            handler[1] = new Point(handler[0].x, y12);
            handler[2] = new Point(handler[3].x, y12);
        }
      }
      if (connector.getOutDeviceCarrierName().equals(this.selectedCarrier.getName())){
        DeviceCarrier dc = (DeviceCarrier)carriers.get(connector.getInDeviceCarrierName());
        Point[] handler = connector.getHandler();
        if (handler[0].y<handler[3].y){
            handler[3] = new Point(handler[3].x - offsetX, handler[3].y - offsetY);
            int y12 = handler[3].y - 10 < handler[1].y  ?  handler[3].y - 10 : handler[1].y ;
            handler[1] = new Point(handler[0].x, y12);
            handler[2] = new Point(handler[3].x, y12);
        }else{
            handler[3] = new Point(handler[3].x - offsetX, handler[3].y - offsetY);
            int y12 = handler[3].y + 10 > handler[1].y  ?  handler[3].y - 10 : handler[1].y ;
            handler[1] = new Point(handler[0].x, y12);
            handler[2] = new Point(handler[3].x, y12);
        }

      }
      DeviceConnector.adjustConnector(connector);
    }

    this.selectedCarrier.setX(x) ;
    this.selectedCarrier.setY(y) ;
    this.drawCanvas.repaint();
    this.oldLocation.setLocation(e.getPoint()) ;
  }

  public void mouseDragged(MouseEvent e){
    if (dragAction == "MoveConnector" ){
      moveConnector(e);
    }else if (this.dragAction.equals("MoveCarrier")){
      moveCarrier(e);
    }else if (dragAction.equals("AddConnector")){
      addConnector(e);
    }
    drawCanvas.repaint() ;
  }

  public Point caculateLocation(DeviceConnector tConn){
      Point tempoint= null;
      String inDevice = null;
      inDevice = tConn.getInDeviceCarrierName();
      Set entries = carriers.entrySet();
      Iterator iterator =entries.iterator();
      while(iterator.hasNext()){
           Map.Entry entry = (Map.Entry)iterator.next();
           DeviceCarrier carrier = (DeviceCarrier) entry.getValue();
           int x =carrier.getX();
           int y =carrier.getY();
           if (carrier.getName().equals(inDevice) && tConn.getHandler()[0].y<=y){
               Point[] tempoints = tConn.getHandler();
               tempoints[3].x = hotLeadArea.x+width/2;
               tempoints[3].y =  hotLeadArea.y+height+2;
               this.tConnector.setHandler(tempoints);
               tempoint = new Point(tempoints[3]);
               return tempoint;
           }
      }
      return new Point(hotLeadArea.x+width/2,hotLeadArea.y+2);
 }

  public void mouseReleased(MouseEvent e){
    //防止入口和出口的模块相同
    if (tConnector!=null && tConnector.getOutDeviceCarrierName()!=null
            &&tConnector.getInDeviceCarrierName()==tConnector.getOutDeviceCarrierName()) {
        return;
    }
    if (hotLeadArea != null && tConnector != null){  // connector two DeviceCarriers
      String name = newName("CN");;
      DeviceConnector dcon = new DeviceConnector();

/*箭头发出的模块为inDevice，箭头进入的模块为outDevice. 所以对inDevice
而言记录connectorOut,对outDevice而言记录connectorIn*/

      DeviceCarrier outDevice =(DeviceCarrier) this.carriers.get(tConnector.getOutDeviceCarrierName());
      DeviceCarrier inDevice = (DeviceCarrier) this.carriers.get(tConnector.getInDeviceCarrierName());

      outDevice.connectorNum++;  //将与此连接相连的模块的连接数加1
      inDevice.connectorNum++;

      Point[] p = this.tConnector.getHandler() ;
      p[2].setLocation(hotLeadArea.x+width/2, p[2].y) ;
      p[3].setLocation(caculateLocation(tConnector)) ;
      dcon.setHandler(this.tConnector.getHandler());
      dcon.setInDeviceCarrierName(this.tConnector.getInDeviceCarrierName());
      dcon.setOutDeviceCarrierName(this.tConnector.getOutDeviceCarrierName());
      dcon.setName(name);
      connectors.put(name, dcon);

      dcon.setSelected(false) ;
      drawCanvas.repaint();
    }

    this.hotLeadArea = null;
    this.tConnector = null;
    registeredClassPane.classTree.setSelectionPath(null);
    setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
    this.dragAction = "";
    drawCanvas.repaint();
  }

 /*当鼠标进入部件区域时调用mouseEntered()方法，当鼠标从部件区域里开始调用mouseExited()
   取得所要选择的模块，在RegisteredClassPane中valueChanged方法先取得slectedNode，再调用
   registeredClassPane中的getSelectedNode方法*/
  public void mouseEntered(MouseEvent e){
    int type = -1;
    ClassNode node = registeredClassPane.getSelectedNode();
    if (node != null) {