mvc.rar_mvc_mvc模式

import javax.swing.*; import java.awt.event.*; /** * <p>Title: SphereWindow</p> * <p>Description: The Controller part of the model-view paradigm</p> * <p>Copyright: Copyright (c) 2005</p> * @author Smart Lee * @version 1.1 */ public class SphereWindow extends SphereFrame implements ActionListener, MouseListener, MouseMotionListener{ // 创建视图一 TextView tView = new TextView(); // 创建视图二 GraphicsView gView = new GraphicsView(); // 创建模型 Sphere model = new Sphere(); //Construct the application public SphereWindow() { try { jbInit(); } catch(Exception e) { e.printStackTrace(); } } //Main method public static void main(String[] args) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch(Exception e) { e.printStackTrace(); } new SphereWindow(); } private void jbInit() throws Exception { // 添加视图 contentPane.add(tView); contentPane.add(gView); this.setVisible(true); // 建立模型与视图一的关联 model.addObserver(tView); tView.update(model, null); // 建立模型与视图二的关联 model.addObserver(gView); gView.update(model, null); // 为视图一各控件添加事件监听器 tView.radiusTextField.addActionListener(this); tView.volumeTextField.addActionListener(this); tView.surfAreaTextField.addActionListener(this); // 为视图二添加鼠标事件 gView.addMouseListener(this); gView.addMouseMotionListener(this); } public void actionPerformed(ActionEvent e) { if (e.getSource() == tView.radiusTextField) { JTextField jtf = (JTextField)e.getSource(); // 捕获异常字符 try { double radius = Double.parseDouble(jtf.getText()); // 更改模型数据 model.setRadius(radius); } catch (Exception ex) { JOptionPane.showMessageDialog(null,"illegal character!"); } // 调用视图二的绘图方法以更新视图 gView.repaint(); } if (e.getSource() == tView.volumeTextField) { JTextField jtf = tView.volumeTextField; try { double volume = Double.parseDouble(jtf.getText()); model.setVolume(volume); } catch(Exception ex) { JOptionPane.showMessageDialog(null,"illegal character!"); } gView.repaint(); } if (e.getSource() == tView.surfAreaTextField) { JTextField jtf = (JTextField)e.getSource(); try { double surfArea = Double.parseDouble(jtf.getText()); model.setSuArea(surfArea); } catch(Exception ex) { JOptionPane.showMessageDialog(null,"illegal character!"); } gView.repaint(); } } public void mousePressed(MouseEvent e) { int X = gView.getWidth() / 2; int Y = gView.getHeight() / 2; gView.bShowDim = true; // 控制是否显示点坐标 gView.x = e.getX(); gView.y = e.getY(); // 圆心坐标(X, Y) gView.radius = pointDistance(gView.x, gView.y, X, Y); // 更改数据模型 model.setRadius(gView.radius); gView.repaint(); } public void mouseReleased(MouseEvent e) { // 鼠标离开时不再显示点坐标 gView.bShowDim = false; gView.repaint(); } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } public void mouseClicked(MouseEvent e) { } public void mouseMoved(MouseEvent e) { } public void mouseDragged(MouseEvent e) { int X = gView.getWidth() / 2; int Y = gView.getHeight() / 2; gView.bShowDim = true; gView.x = e.getX(); gView.y = e.getY(); gView.radius = pointDistance(gView.x, gView.y, X, Y); model.setRadius(gView.radius); gView.repaint(); } /** * 求两点距离 * @param x1 double 点1的横坐标 * @param y1 double 点1的纵坐标 * @param x2 double 点2的横坐标 * @param y2 double 点2的纵坐标 * @return double */ protected double pointDistance(double x1, double y1, double x2, double y2) { return Math.pow(((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)), 1/2.0); } }