java课程设计作业 java课程设计

package start; import database.DBHelper; import entity.*; import factory.CircleFactory; import factory.LineFactory; import factory.RectFactory; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.ArrayList; import java.util.Random; import java.util.Stack; /** * 描述:创建自己的画图面板类，该类还实现了动作监听，鼠标键听的接口； * 因此，该类不仅可以看作一个面板，还是一个大的监听器 * 注：不考虑只画一个点的情形（即x1=x2,y1=y2） */ public class MyPanel extends JPanel implements ActionListener,MouseListener,MouseMotionListener { private String[] btnName = {"上一步","画圆形","画矩形","画直线","清空","复制","组合","取消组合","装饰","卸装","保存","加载"}; private int flag = -1; // 当前图形对应的标记位 private boolean color_flag = false; // 只能选中一个图形用 // 移动图形所需 private Pattern checkedPattern = null; private boolean first = false; private boolean second = false; private int startPositionX; private int startPositionY; private int endPositionX; private int endPositionY; // private boolean start = false; private Random rand = new Random(); private Pattern curPattern = null; //当前做遍历的图形 private ArrayList<Pattern>patternList = new ArrayList<Pattern>(); // 图形对象容器 private Stack<Command>commandStack = new Stack<Command>(); // 命令模式实现撤销 // 具体工厂 private CircleFactory circleFactory = new CircleFactory(); private RectFactory rectFactory = new RectFactory(); private LineFactory lineFactory = new LineFactory(); // 组合模式用 private boolean canComposite = false; private boolean existedComposite = false; // 保存使用 private DBHelper db; public MyPanel(){ for (int i = 0; i < btnName.length; i++) { JButton button = new JButton(btnName[i]); button.addActionListener(this::actionPerformed); // 为每个按钮添加点击事件 this.add(button); // 按钮添加至面板 } } // 注:在最开始没有图形时 及 当画板上出现新图形时，在最后系统都会自动调用该方法; @Override protected void paintComponent(Graphics g) { // System.out.println("paintComponent"); super.paintComponent(g); // 清除面板上的图像 for (int i = 0; i < patternList.size(); i++) { g.setColor(Color.black); curPattern = patternList.get(i); curPattern.draw(g); } } @Override public void actionPerformed(ActionEvent e) { switch (e.getActionCommand()){ case "上一步": // 命令模式 if(! commandStack.empty()){ // patternList = commandStack.pop().execute(patternList); Command command = commandStack.pop(); if(command instanceof DecorateCommand){ this.checkedPattern = ((DecorateCommand) command).getDeletedPattern(); } patternList = command.execute(patternList); } this.repaint(); break; case "画圆形": curPattern = circleFactory.createPattern(); // 工厂方法 flag = 0; patternList.add(curPattern); commandStack.push(new AddCommand(curPattern)); break; case "画矩形": curPattern = rectFactory.createPattern(); flag = 1; patternList.add(curPattern); commandStack.push(new AddCommand(curPattern)); break; case "画直线": curPattern = lineFactory.createPattern(); flag = 3; // 2已被占用 patternList.add(curPattern); commandStack.push(new AddCommand(curPattern)); break; case "清空": checkedPattern = null; curPattern = null; try { commandStack.push(new ClearCommand(patternList)); } catch (CloneNotSupportedException e1) { e1.printStackTrace(); } patternList.clear(); repaint(); break; case "复制": if(checkedPattern != null){ try { generateSelf(); } catch (CloneNotSupportedException e1) { e1.printStackTrace(); } } break; case "组合": if(canComposite){ CompositePattern compositePattern = new CompositePattern(); CompositeCommand compositeCommand = new CompositeCommand(compositePattern); for(int i=0;i<patternList.size();){ curPattern = patternList.get(i); if(curPattern.isSelected()){ // System.out.println(i); compositePattern.add(curPattern); compositeCommand.addPattern(curPattern); patternList.remove(curPattern); }else{ i++; } } patternList.add(compositePattern); commandStack.push(compositeCommand); // System.out.println("patternList:"+patternList.size()); // System.out.println(compositePattern.getSize()); compositePattern.setSelected(false); this.repaint(); } break; case "取消组合": // 当前存在选定的对象 if(checkedPattern != null){ // 当前选定的为组合对象,非叶子节点 if(checkedPattern instanceof CompositePattern){ CompositePattern cur = (CompositePattern)checkedPattern; for(int i=0; i < cur.getSize(); i++){ patternList.add(cur.getChild(i)); } patternList.remove(checkedPattern); }else if(checkedPattern instanceof BorderDecorator){ // 选中的是被装饰的对象 // 保证该被装饰的对象为组合对象 if(((BorderDecorator) checkedPattern).getCompositeRoot() != null){ CompositePattern cur = (CompositePattern)((BorderDecorator) checkedPattern).getCompositeRoot(); for(int i=0; i < cur.getSize(); i++){ patternList.add(new BorderDecorator(cur.getChild(i))); } patternList.remove(checkedPattern); } } } break; case "装饰": // System.out.println(checkedPattern); if(checkedPattern != null){ Pattern decoratorPattern = new BorderDecorator(checkedPattern); commandStack.push(new DecorateCommand(checkedPattern,decoratorPattern)); patternList.remove(checkedPattern); patternList.add(decoratorPattern); checkedPattern = decoratorPattern; // System.out.println(123); } this.repaint(); break; case "卸装": // System.out.println(checkedPattern); if(checkedPattern != null){ // System.out.println(123);