我在 Java Applet 中创建了一个简单的记忆游戏。我的卡有问题。图像在第一次出现时需要一些额外的加载时间。如何解决?我需要在卡片翻转后立即显示图像。
我显示加载屏幕,直到应用程序不在AppStates.READY
或AppStates.WAIT_FOR_START
状态,但它没有帮助。
Memo.cs - 加载图像的主类
public class Memo extends JApplet {
//...
public void init() {
//...
try {
SwingUtilities.invokeAndWait(new Runnable() { @Override public void run() { createGUI(); }});
}
catch(Exception e) {
e.printStackTrace();
}
}
private void createGUI() {
final Model model = new Model(...);
final View view = new View(model);
getContentPane().add(view, BorderLayout.CENTER);
setBackground(backgroundColor);
setPreferredSize(new Dimension(width, height));
model.setLoading(loadImages(loadingPath, format, 1));
model.setCardsImages(loadImages(cardImagePath, format, 13));
//...
model.setAppState(AppStates.PROCESS);
model.startNewGame();
view.repaint();
}
private Image[] loadImages(String path1, String path2, int count) {
Image[] imgs = new Image[count];
for(int i = 0; i < count; ++i) {
imgs[i] = getImage(getCodeBase(), path1 + i + path2);
}
return imgs;
}
}
Model.cs - 保存图像和应用程序状态,初始化板
public class Model {
//...
private AppStates appState;
private Image[] cardsImages;
public Model(...) {
//...
appState = AppStates.INIT;
}
public void startNewGame() {
setAppState(AppStates.PROCESS);
//... - init board - table with images' id
setAppState(AppStates.WAIT_FOR_START);
}
public void setCardsImages(Image[] cardsImages) {
this.cardsImages = cardsImages;
}
public Image getCardsImage(int v) {
return cardsImages[v];
}
public AppStates getAppState() {
return appState;
}
public void setAppState(AppStates appState) {
this.appState = appState;
//...
}
//...
}
View.cs - 显示板
public class View extends JPanel {
//...
private Model model;
public View(Model model) {
this.model = model;
//...
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
if(model != null) {
switch (model.getAppState()) {
//...
case WAIT_FOR_START:
case READY:
//...
drawBoard(g2d, model.getBoard(), model.getStates(), model.getFrontTypes());
break;
}
}
repaint();
}
private void drawBoard(Graphics2D g2d, int[][] board, int[][] states, int[][] frontTypes) {
if(board != null && states != null && board.length > 0 && states.length > 0) {
for(int x = 0; x < board.length; x++) {
for(int y = 0; y < board[x].length; y++) {
if(states[x][y] != Model.HIDE) {
Image img = null;
//...
img = model.getCardsImage(board[x][y]);
g2d.drawImage(
img,
model.getFirstCardX() + x * model.getCardDistance() + x * model.getCardWidth(),
model.getFirstCardY() + y * model.getCardDistance() + y * model.getCardHeight(),
model.getCardWidth(),
model.getCardHeight(),
null);
//...
}
}
}
}
}
}