JAVA Applet 工作流设计器

package com.applet.flows.bar; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.io.BufferedInputStream; import java.io.ByteArrayInputStream; import java.io.StringWriter; import java.util.Collection; import java.util.Vector; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JToolBar; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.DocumentHelper; import org.dom4j.Element; import org.dom4j.io.OutputFormat; import org.dom4j.io.SAXReader; import org.dom4j.io.XMLWriter; import com.applet.flows.EndNodeButton; import com.applet.flows.ForkNodeButton; import com.applet.flows.IFlow; import com.applet.flows.INodeButton; import com.applet.flows.JoinNodeButton; import com.applet.flows.NodeButtonSupport; import com.applet.flows.StartNodeButton; import com.applet.flows.StrandNodeButton; import com.applet.flows.panel.FlowPanel; public class FlowBar extends JToolBar { /** * */ private static final long serialVersionUID = 3594121944485761637L; private int ID = 1; private Collection<IFlow> collection = null; private FlowPanel jframe = null; private JLabel label = null; public FlowBar(FlowPanel frame) { this.collection = new Vector<IFlow>(); this.setSize(frame.getWidth(),40); this.setFloatable(false); this.setLocation(0, 0); this.jframe = frame; this.add(new BarButton(StartNodeButton.class,"起始节点")); this.add(new BarButton(EndNodeButton.class,"结束节点")); this.add(new BarButton(StrandNodeButton.class,"标准节点")); this.add(new BarButton(ForkNodeButton.class,"分散节点")); this.add(new BarButton(JoinNodeButton.class,"会聚节点")); this.addSeparator(); this.add(new WriterButton()); this.add(new HelpButton()); this.addSeparator(); this.label = new JLabel(); this.add(this.label,JToolBar.LEFT_ALIGNMENT); // this.add(new CloseButton()); this.jframe.add(this); this.label.setText("设计器准备完毕"); } public void setText(String str){ this.label.setText(str); this.label.repaint(); } public class HelpButton extends JButton implements MouseListener{ public HelpButton() { this.setText("帮助"); this.setIcon(new ImageIcon(NodeButtonSupport.class.getResource("help.gif"))); this.addMouseListener(this); } public void mouseClicked(MouseEvent arg0) { JOptionPane.showMessageDialog(null,"1) 点击工具类按钮添加节点\n2) 左键拖动节点进行布局\n3) 右键拖动一个节点至另一节点进行连线\n4) 点击保存按钮生成XML" ,"帮助",JOptionPane.PLAIN_MESSAGE); } public void mouseEntered(MouseEvent arg0) { // TODO 自动生成方法存根 } public void mouseExited(MouseEvent arg0) { // TODO 自动生成方法存根 } public void mousePressed(MouseEvent arg0) { // TODO 自动生成方法存根 } public void mouseReleased(MouseEvent arg0) { } } public class WriterButton extends JButton implements MouseListener{ /** * */ private static final long serialVersionUID = -14905681660248362L; public WriterButton(){ this.setText("保存"); this.setIcon(new ImageIcon(NodeButtonSupport.class.getResource("save.gif"))); this.addMouseListener(this); } public void mouseClicked(MouseEvent e) { try { String xml = ""; String node = ""; String line = ""; for(IFlow flow : collection){ flow.checkNode(); String[] xs = flow.asXML(); node += xs[0]; line += xs[1]; } xml = "<NODE>" + node + "</NODE><LINE>" + line + "</LINE>"; xml = "<FYBY_WORK_FLOW>" + xml + "</FYBY_WORK_FLOW>"; Document doc = new SAXReader().read(new ByteArrayInputStream(xml.getBytes("UTF-8"))); OutputFormat format = OutputFormat.createPrettyPrint(); format.setEncoding("utf-8"); StringWriter sw = new StringWriter(); XMLWriter writer = new XMLWriter(sw,format); writer.write(doc); JOptionPane.showMessageDialog(null,sw.toString() ,"生成XML",JOptionPane.PLAIN_MESSAGE); } catch (Exception e1) { JOptionPane.showMessageDialog(null,e1.getLocalizedMessage() ,"生成XML发生错误",JOptionPane.ERROR_MESSAGE); } } public void mouseEntered(MouseEvent arg0) { } public void mouseExited(MouseEvent arg0) { } public void mousePressed(MouseEvent arg0) { } public void mouseReleased(MouseEvent arg0) { } } public class CloseButton extends JButton implements MouseListener{ public CloseButton() { this.setText("关闭"); this.setIcon(new ImageIcon(NodeButtonSupport.class.getResource("close.gif"))); this.addMouseListener(this); } public void mouseClicked(MouseEvent e) { jframe = null; } public void mouseEntered(MouseEvent arg0) { // TODO 自动生成方法存根 } public void mouseExited(MouseEvent arg0) { // TODO 自动生成方法存根 } public void mousePressed(MouseEvent arg0) { // TODO 自动生成方法存根 } public void mouseReleased(MouseEvent arg0) { // TODO 自动生成方法存根 } } public class BarButton extends JButton implements MouseListener{ /** * */ private static final long serialVersionUID = -8810893399231635650L; private Class clazz = null; public BarButton(Class clazz,String text){ this.clazz = clazz; this.setText(text); this.addMouseListener(this); try { Object ob = this.clazz.newInstance(); if(ob instanceof NodeButtonSupport){ Icon icon = ((NodeButtonSupport)ob).getIcon(); if(icon != null){ this.setIcon(icon); } } ob = null; } catch (Exception e) { e.printStackTrace(); } } public void mouseClicked(MouseEvent e) { try { Object ob = this.clazz.newInstance(); if(ob instanceof INodeButton){ INodeButton nb = (INodeButton)ob; nb.init(ID++); jframe.add((JButton)nb); jframe.setText("创建[" + ((JButton)nb).getText() + "]"); collection.add(nb); jframe.repaint(); }else{ System.out.println("INodeButton Only"); } }catch( Exception e1) { e1.printStackTrace(); } } public void mouseEntered(MouseEvent arg0) { } public void mouseExited(MouseEvent arg0) { } public void mousePressed(MouseEvent arg0) { } public void mouseReleased(MouseEvent arg0) { } } }