我正在练习MVC样式编程。我在一个文件中有一个Mastermind游戏,工作正常(也许除了“检查”按钮在启动时不可见这一事实之外)。
http://paste.pocoo.org/show/226726/
但是,当我将其重写为模型,视图,控制器文件时,以及单击空的Pin(应进行更新,并用新颜色重新粉刷)时,就会发生这种情况。有人可以在这里看到任何问题吗?我试过将repaint()放在不同的地方,但是根本不起作用:/
主要:
public class Main {
public static void main(String[] args){
Model model = new Model();
View view = new View("Mastermind", 400, 590, model);
Controller controller = new Controller(model, view);
view.setVisible(true);
}
}
型号:
import java.util.Random;
public class Model{
static final int
LINE = 5,
SCORE = 10, OPTIONS = 20;
Pin pins[][] = new Pin[21][LINE];
int combination[] = new int[LINE];
int curPin = 0;
int turn = 1;
Random generator = new Random();
int repaintPin;
boolean pinsRepaint=false;
int pinsToRepaint;
boolean isUpdate = true, isPlaying = true, isRowFull = false;
static final int HIT_X[] = {270,290,310,290,310}, HIT_Y[] = {506,496,496,516,516};
public Model(){
for ( int i=0; i < SCORE; i++ ){
for ( int j = 0; j < LINE; j++ ){
pins[i][j] = new Pin(20,0);
pins[i][j].setPosition(j*50+30,510-i*50);
pins[i+SCORE][j] = new Pin(8,0);
pins[i+SCORE][j].setPosition(HIT_X[j],HIT_Y[j]-i*50);
}
}
for ( int i=0; i < LINE; i++ ){
pins[OPTIONS][i] = new Pin( 20, i+2 );
pins[OPTIONS][i].setPosition( 370,i * 50 + 56);
}
}
void fillHole(int color) {
pins[turn-1][curPin].setColor(color+1);
pinsRepaint = true;
pinsToRepaint = turn;
curPin = (curPin+1) % LINE;
if (curPin == 0){
isRowFull = true;
}
pinsRepaint = false;
pinsToRepaint = 0;
}
void check() {
int junkPins[] = new int[LINE], junkCode[] = new int[LINE];
int pinCount = 0, pico = 0;
for ( int i = 0; i < LINE; i++ ) {
junkPins[i] = pins[turn-1][i].getColor();
junkCode[i] = combination[i];
}
for ( int i = 0; i < LINE; i++ ){
if (junkPins[i]==junkCode[i]) {
pins[turn+SCORE][pinCount].setColor(1);
pinCount++;
pico++;
junkPins[i] = 98;
junkCode[i] = 99;
}
}
for ( int i = 0; i < LINE; i++ ){
for ( int j = 0; j < LINE; j++ )
if (junkPins[i]==junkCode[j]) {
pins[turn+SCORE][pinCount].setColor(2);
pinCount++;
junkPins[i] = 98;
junkCode[j] = 99;
j = LINE;
}
}
pinsRepaint = true;
pinsToRepaint = turn + SCORE;
pinsRepaint = false;
pinsToRepaint=0;
if ( pico == LINE ){
isPlaying = false;
}
else if ( turn >= 10 ){
isPlaying = false;
}
else{
curPin = 0;
isRowFull = false;
turn++;
}
}
void combination() {
for ( int i = 0; i < LINE; i++ ){
combination[i] = generator.nextInt(6) + 1;
}
}
}
class Pin{
private int color, X, Y, radius;
public Pin(){
X = 0; Y = 0; radius = 0; color = 0;
}
public Pin( int r,int c ){
X = 0; Y = 0; radius = r; color = c;
}
public int getX(){
return X;
}
public int getY(){
return Y;
}
public int getRadius(){
return radius;
}
public void setRadius(int r){
radius = r;
}
public void setPosition( int x,int y ){
this.X = x ;
this.Y = y ;
}
public void setColor( int c ){
color = c;
}
public int getColor() {
return color;
}
}
视图:
import java.awt.*;
import javax.swing.*;
public class View extends Frame{
Model model;
JButton checkAnswer;
private JPanel button;
private static final Color COLORS[] = {Color.black, Color.white, Color.red, Color.yellow, Color.green, Color.blue, new Color(7, 254, 250)};
public View(String name, int w, int h, Model m){
model = m;
setTitle( name );
setSize( w,h );
setResizable( false );
this.setLayout(new BorderLayout());
button = new JPanel();
button.setSize( new Dimension(400, 100));
button.setVisible(true);
checkAnswer = new JButton("Check");
checkAnswer.setSize( new Dimension(200, 30));
button.add( checkAnswer );
this.add( button, BorderLayout.SOUTH);
button.setVisible(true);
}
@Override
public void paint( Graphics g ) {
g.setColor( new Color(238, 238, 238));
g.fillRect( 0,0,400,590);
for ( int i=0; i < model.pins.length; i++ ) {
paintPins(model.pins[i][0],g);
paintPins(model.pins[i][1],g);
paintPins(model.pins[i][2],g);
paintPins(model.pins[i][3],g);
paintPins(model.pins[i][4],g);
}
}
@Override
public void update( Graphics g ) {
if ( model.isUpdate ) {
paint(g);
}
else {
model.isUpdate = true;
paintPins(model.pins[model.repaintPin-1][0],g);
paintPins(model.pins[model.repaintPin-1][1],g);
paintPins(model.pins[model.repaintPin-1][2],g);
paintPins(model.pins[model.repaintPin-1][3],g);
paintPins(model.pins[model.repaintPin-1][4],g);
}
}
void repaintPins( int pin ) {
model.repaintPin = pin;
model.isUpdate = false;
repaint();
}
public void paintPins(Pin p, Graphics g ){
int X = p.getX();
int Y = p.getY();
int color = p.getColor();
int radius = p.getRadius();
int x = X-radius;
int y = Y-radius;
if (color > 0){
g.setColor( COLORS[color]);
g.fillOval( x,y,2*radius,2*radius );
}
else{
g.setColor( new Color(238, 238, 238) );
g.drawOval( x,y,2*radius-1,2*radius-1 );
}
g.setColor( Color.black );
g.drawOval( x,y,2*radius,2*radius );
}
}
控制器:
import java.awt.*;
import java.awt.event.*;
public class Controller implements MouseListener, ActionListener {
private Model model;
private View view;
public Controller(Model m, View v){
model = m;
view = v;
view.addWindowListener( new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
} });
view.addMouseListener(this);
view.checkAnswer.addActionListener(this);
model.combination();
}
public void actionPerformed( ActionEvent e ) {
if(e.getSource() == view.checkAnswer){
if(model.isRowFull){
model.check();
}
}
}
public void mousePressed(MouseEvent e) {
Point mouse = new Point();
mouse = e.getPoint();
if (model.isPlaying){
if (mouse.x > 350) {
int button = 1 + (int)((mouse.y - 32) / 50);
if ((button >= 1) && (button <= 5)){
model.fillHole(button);
if(model.pinsRepaint){
view.repaintPins( model.pinsToRepaint );
}
}
}
}
}
public void mouseClicked(MouseEvent e) {}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
}
正如您所发现的,“模型-视图-控制器”模式不是万能药,但它提供了一些优势。在MVC中扎根,Swing可分离模型体系结构在“ Swing体系结构概述”中进行了讨论。基于此轮廓,下面的示例显示了一个更简单的游戏的MVC实现,它说明了相似的原理。请注意,Model管理一个Piece,随机选择。响应用户的选择,View调用check()方法,同时侦听来自Modelvia的响应update()。在View随后利用所获得的信息来更新自身Model。类似地,Controller可以reset()在Model。特别是中没有绘图,而中Model也没有游戏逻辑View。这个稍微复杂一些的游戏旨在说明相同的概念。
附录:我已经修改了原始示例,以显示MVC如何在View不更改的性质的情况下增强Model。
附录:正如@akf所观察到的那样,MVC取决于观察者模式。您Model需要一种方法来通知View更改。几种方法被广泛使用:
在下面的示例中,为简单起见对其进行了Model扩展Observable。
如应用程序中EventListenerList所示,更常见的方法是使用,Converter并由大量EventListener子接口和实现类建议。
第三种选择是使用a PropertyChangeListener,如此处和此处所示。
附录:有关Swing控制器的一些常见问题已在此处和此处解决。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Observable;
import java.util.Observer;
import java.util.Random;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
* @see https://stackoverflow.com/q/3066590/230513
* 15-Mar-2011 r8 https://stackoverflow.com/questions/5274962
* 26-Mar-2013 r17 per comment
*/
public class MVCGame implements Runnable {
public static void main(String[] args) {
EventQueue.invokeLater(new MVCGame());
}
@Override
public void run() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new MainPanel());
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
class MainPanel extends JPanel {
public MainPanel() {
super(new BorderLayout());
Model model = new Model();
View view = new View(model);
Control control = new Control(model, view);
JLabel label = new JLabel("Guess what color!", JLabel.CENTER);
this.add(label, BorderLayout.NORTH);
this.add(view, BorderLayout.CENTER);
this.add(control, BorderLayout.SOUTH);
}
}
/**
* Control panel
*/
class Control extends JPanel {
private Model model;
private View view;
private JButton reset = new JButton("Reset");
public Control(Model model, View view) {
this.model = model;
this.view = view;
this.add(reset);
reset.addActionListener(new ButtonHandler());
}
private class ButtonHandler implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
if ("Reset".equals(cmd)) {
model.reset();
}
}
}
}
/**
* View
*/
class View extends JPanel {
private static final String s = "Click a button.";
private Model model;
private ColorIcon icon = new ColorIcon(80, Color.gray);
private JLabel label = new JLabel(s, icon, JLabel.CENTER);
public View(Model model) {
super(new BorderLayout());
this.model = model;
label.setVerticalTextPosition(JLabel.BOTTOM);
label.setHorizontalTextPosition(JLabel.CENTER);
this.add(label, BorderLayout.CENTER);
this.add(genButtonPanel(), BorderLayout.SOUTH);
model.addObserver(new ModelObserver());
}
private JPanel genButtonPanel() {
JPanel panel = new JPanel();
for (Piece p : Piece.values()) {
PieceButton pb = new PieceButton(p);
pb.addActionListener(new ButtonHandler());
panel.add(pb);
}
return panel;
}
private class ModelObserver implements Observer {
@Override
public void update(Observable o, Object arg) {
if (arg == null) {
label.setText(s);
icon.color = Color.gray;
} else {
if ((Boolean) arg) {
label.setText("Win!");
} else {
label.setText("Keep trying.");
}
}
}
}
private class ButtonHandler implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
PieceButton pb = (PieceButton) e.getSource();
icon.color = pb.piece.color;
label.repaint();
model.check(pb.piece);
}
}
private static class PieceButton extends JButton {
Piece piece;
public PieceButton(Piece piece) {
this.piece = piece;
this.setIcon(new ColorIcon(16, piece.color));
}
}
private static class ColorIcon implements Icon {
private int size;
private Color color;
public ColorIcon(int size, Color color) {
this.size = size;
this.color = color;
}
@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setColor(color);
g2d.fillOval(x, y, size, size);
}
@Override
public int getIconWidth() {
return size;
}
@Override
public int getIconHeight() {
return size;
}
}
}
/**
* Model
*/
class Model extends Observable {
private static final Random rnd = new Random();
private static final Piece[] pieces = Piece.values();
private Piece hidden = init();
private Piece init() {
return pieces[rnd.nextInt(pieces.length)];
}
public void reset() {
hidden = init();
setChanged();
notifyObservers();
}
public void check(Piece guess) {
setChanged();
notifyObservers(guess.equals(hidden));
}
}
enum Piece {
Red(Color.red), Green(Color.green), Blue(Color.blue);
public Color color;
private Piece(Color color) {
this.color = color;
}
}
这是我的链接 url正在重写,但页面未运行。。。这是一个错误 未找到 请求的URL/domin。在此服务器上找不到com/new。 此外,尝试使用ErrorDocument处理请求时遇到404 Not Found错误。 域中的Apache服务器。com端口80
问题内容: 我已经建立了俄罗斯方块游戏。现在,我已经使用JPanel来显示内容和块(使用paintComponents()方法)。 问题是,当我尝试从另一个JFrame调用tetris程序时,它根本无法绘制。 我的俄罗斯方块主菜单的代码是: 当调用MatrixBoard的构造函数时,俄罗斯方块游戏会在新窗口中开始。但是,这些块在屏幕上不可见。MatrixBoard的代码是: 请帮忙。我怀疑问题出在
问题内容: 我是Spring MVC的新手,我正在尝试编写一个简单的Web应用程序以开始使用Spring。 这是我所拥有的: web.xml: main-servlet.xml LoginController.java index.jsp Login.jsp index.jsp可以很好地启动,但是当我单击导航到登录页面时,我得到404。我使用的是Tomcat7。由于想法不清,看来Dispatche
我尝试了《Spring in Action第三版》一书中描述的Spring MVC应用程序。不幸的是,到目前为止,在浪费了6个小时之后,我无法运行最简单的应用程序。我总是会收到“HTTP状态404”错误。 我在这个论坛上找到了很多关于“@RequestMappingSpring不工作”的帖子,现在想知道我是否在遵循正确的书,或者是否有一些非常基本的东西困扰着这么多Spring的学习者。 我试着运行
问题内容: 因此,我的设置无法按我想要的方式工作。因此,每当我运行该程序时,它就会立即从0变为100。我尝试使用,任务,并尝试了,但没有任何尝试。 这是我的程序: @MadProgrammer这是我尝试做一名摆动工作人员并将每个名称写入文档并更新进度栏的尝试。该程序将达到86%左右并停止运行,永远不会创建完成的文档。该程序将创建一个空白文档。这是我首先创建的SwingWorker对象,这是两种方法
问题内容: 我在JLayeredpane上有两个JPanels。其中一个显示pdf,重叠的一个具有透明背景(我使用过setOpaque(false))。现在,我可以将图形添加到透明面板中,这样看来我实际上是在注释pdf。我想要一个橡皮擦工具来删除这些注释。我尝试使用以下代码 其中path是由多条线构成的形状。现在,不是在先前的图形上绘制 透明线 ,而是绘制 黑线 。我要去哪里错了? 问题答案: 请