4
我想用java（swing）中的動畫創建函數。我想創建一個「堆棧」卡，然後能夠使用方法從堆棧中抽取一張卡。然後我畫的牌應該「翻轉」以露出正面。Swing java動畫只在未從監聽器調用時才起作用
這工作正常，除非當我試圖使用偵聽器繪製一張新卡。
我通過構建堆棧然後繪製一張卡來啓動程序。然後我有一個繪製新卡的按鈕（actionlistener）。但是，我看不到動畫顯示堆疊減少一張卡片。我試圖創建一個gif來展示問題。
Gif file showing the problem http://people.dsv.su.se/~chra4852/gif.gif
我最好的猜測是，它是與線程或EDT？
下面是代碼（因爲它並不重要我已刪除了使用Scalr類）：
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.*;
// import org.imgscalr.Scalr; Removed for Stackoverflow
public class Test extends JFrame{
public static JPanel cardPanel = new JPanel();
public static JLayeredPane layerPane = new JLayeredPane();
private final CardFlipp cardFlipp;
Test() {
cardFlipp = new CardFlipp();
this.setLayout(new BorderLayout());
layerPane.setPreferredSize(new Dimension(700, 300));
add(cardPanel, BorderLayout.CENTER);
JButton newJButton = new JButton("New card");
newJButton.addActionListener(new drawNewCardListener());
add(newJButton, BorderLayout.SOUTH);
setSize(800,400);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
Point pos = new Point(10,30);
cardFlipp.createCardFlipp(30, pos, layerPane, cardPanel);
System.out.println("Now running on thread " + Thread.currentThread());
try {
Thread.sleep(3000);
} catch (InterruptedException ex) {
Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);
}
cardFlipp.displayCard("http://imgi.se/image.php?di=IYW9");
}
public static void main(String[] args){
new Test();
}
class drawNewCardListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent ae) {
System.out.println("Now running on thread " + Thread.currentThread());
cardFlipp.displayCard("http://imgi.se/image.php?di=IYW9");
}
}
}
class CardFlipp extends JPanel{
private Point origin;
private BufferedImage icon;
private JLayeredPane lPane;
private JPanel jPanel;
private int lastCardDisplayedId = 0;
public void createCardFlipp(int amount, Point pos, JLayeredPane lPaneRef, JPanel jPanelRef) {
origin = pos;
setIcon("http://imgi.se/image.php?di=HPCJ");
lPane = lPaneRef;
jPanel = jPanelRef;
for(int i = amount; i > 0; i--) {
origin.x += 3;
lPane.add(new Card(origin, icon, i), new Integer(amount-i));
jPanel.add(lPane);
lPane.revalidate();
lPane.repaint();
try {
Thread.sleep(80);
} catch (InterruptedException ex) {
Logger.getLogger(CardFlipp.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
public void displayCard(String fileUrl) {
Card c = (Card) lPane.getComponent(0);
if(lastCardDisplayedId == 0) {
origin = new Point(c.getBounds().x + 370, c.getBounds().y);
}
int cardId = c.getId();
setIcon(fileUrl);
c.flippCardRight(lastCardDisplayedId);
lPane.remove(c);
if(lastCardDisplayedId != 0) {
for(int i = 0; i < lPane.getComponentCount(); i++) {
c = (Card) lPane.getComponent(i);
if(c.getId() == lastCardDisplayedId) {
lPane.remove(c);
break;
}
}
}
lPane.repaint();
lPane.add(new Card(origin, icon, cardId), new Integer(0));
jPanel.add(lPane);
lastCardDisplayedId = cardId;
}
private void setIcon(String urlPath) {
try {
URL url = new URL(urlPath);
icon = ImageIO.read(url);
} catch (IOException e) {
System.err.println(e);
System.exit(-1);
icon = null;
}
}
}
class Card extends JComponent {
private BufferedImage buffImg;
private ImageIcon iconImg;
private final int id;
public Card(Point origin, BufferedImage img, int count) {
buffImg = img;
iconImg = new ImageIcon(buffImg);
setBounds(origin.x,origin.y,iconImg.getIconWidth(),iconImg.getIconHeight());
this.id = count;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(iconImg.getImage(), 0, 0, this);
}
public void flippCardRight(int count) {
int x = count * 3;
int newPosX = getBounds().x + iconImg.getIconWidth() + 20;
while(getBounds().x < newPosX + x) {
setBounds(getBounds().x+5,getBounds().y,iconImg.getIconWidth(),iconImg.getIconHeight());
wait10MiliSec();
}
// Removed to not need the scalr class
//int minimize = 10;
//while(iconImg.getIconWidth() > minimize) {
//buffImg = Scalr.resize(buffImg, Scalr.Method.SPEED, Scalr.Mode.FIT_EXACT, //iconImg.getIconWidth()-minimize, iconImg.getIconHeight(), Scalr.OP_ANTIALIAS);
//iconImg = new ImageIcon(buffImg);
//setBounds(getBounds().x+minimize-1,getBounds().y,iconImg.getIconWidth(),iconImg.getIconHeight());
//wait10MiliSec();
//}
}
private void wait10MiliSec() {
try {
Thread.sleep(10);
} catch (InterruptedException ex) {
Logger.getLogger(Card.class.getName()).log(Level.SEVERE, null, ex);
}
}
public int getId() {
return this.id;
}
public int getImgWidth() {
return iconImg.getIconWidth();
}
}
問題=什麼可以做這樣不管是顯示動畫如果從被叫聽衆？
我相信你已經在這個主題上搜索過，我確定你已經閱讀不要在Swing事件線程上調用'Thread.sleep（...）'，請嘗試我確信你在搜索中找到了一些建議，包括使用Swing Timer。 –
@HovercraftFullOfEels你是對的，使用'Thread.sleep'不好。但即使所有的Thread.sleep被移除，它仍然不起作用。 – Ragnarsson
再次嘗試使用計時器。您需要用定時器替換長時間運行的循環，因爲它們與EDT相關。 –