[英]Java graphics wont update
我目前正在制作一個基於Java的跳棋游戲,我有大量的調試代碼來證明存儲每一部分的數組都在更新,但是由於某些原因圖形沒有改變。 我的主班:
public class CheckersGui extends JPanel{
//private List<Piece> Pieces = new ArrayList<Piece>();
public Piece[][] pieces = new Piece[8][8];
public CheckersGui(){
pieces[0][1] = new Piece(0,100,0);
pieces[1][0] = new Piece(100,0,0);
pieces[2][1] = new Piece(200,100,0);
pieces[3][0] = new Piece(300,0,0);
pieces[4][1] = new Piece(400,100,0);
pieces[5][0] = new Piece(500,0,0);
pieces[6][1] = new Piece(600,100,0);
pieces[7][0] = new Piece(700,0,0);
pieces[0][7] = new Piece(0,700,1);
pieces[1][6] = new Piece(100,600,1);
pieces[2][7] = new Piece(200,700,1);
pieces[3][6] = new Piece(300,600,1);
pieces[4][7] = new Piece(400,700,1);
pieces[5][6] = new Piece(500,600,1);
pieces[6][7] = new Piece(600,700,1);
pieces[7][6] = new Piece(700,600,1);
// create application frame and set visible
//
JFrame f = new JFrame();
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(this);
f.setResizable(true);
f.setSize(820, 850);
// add mouse listeners to enable drag and drop
//
MyMouseListener listener = new MyMouseListener(this.pieces,
this);
this.addMouseListener(listener);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.clearRect(0, 0, 800, 800);
System.out.println("PAINT COMPONENT");
// for (Piece p[] : pieces) {
// for (Piece s : p) {
// System.out.print(s);
// }
// System.out.println();
// }
BufferedImage board = null, crown=null;
try { board = ImageIO.read(new File("src/bobreedhere/Checkers/assets/board3.png"));
crown = ImageIO.read(new File("src/bobreedhere/Checkers/assets/crown.png"));}
catch (IOException e){}
g.drawImage(board, 0,0,null);
for (Piece p[] : pieces) {
for (Piece s : p) {
System.out.print(s);
if(s!=null){
if (s.getColor() == 0)
g.setColor(Color.BLACK);
else
g.setColor(Color.WHITE);
g.fillOval(s.getX(), s.getY(), 100, 100);
if (s.isKinged())
g.drawImage(crown, s.getX(), s.getY(), null);
}
}
System.out.println();
}
}
public static void main(String args[]){
new CheckersGui();
}
}
這是我的鼠標事件類。 老實說,我不知道這是怎么了,所以我想知道越多的信息越好
public class MyMouseListener implements MouseListener{
Piece[][] pieces;
private CheckersGui checkersGui;
private boolean pieceSelected;
private Piece selectedPiece;
public MyMouseListener(Piece[][] pieces, CheckersGui chessGui) {
super();
this.pieces = pieces;
this.checkersGui = chessGui;
}
@Override
public void mouseClicked(MouseEvent e) {
System.out.println("CLICK");
System.out.println(pieces[e.getPoint().x/100][e.getPoint().y/100]);
//System.out.println(e.getPoint().x/100+" : "+e.getPoint().y/100);
if(!pieceSelected){
//System.out.println("NADA");
if(pieces[e.getPoint().x/100][e.getPoint().y/100]!=null){
selectedPiece = pieces[e.getPoint().x/100][e.getPoint().y/100];
pieceSelected = true;
}
}else{
//System.out.println("EYO");
if(pieces[e.getPoint().x/100][e.getPoint().y/100]==null){
pieces[e.getPoint().x/100][e.getPoint().y/100]=selectedPiece;
pieces[selectedPiece.getX()/100][selectedPiece.getY()/100]=null;
pieceSelected=false;
}
}
System.out.println(checkersGui.pieces[e.getPoint().x/100][e.getPoint().y/100]);
checkersGui.repaint();
checkersGui.paintComponent(checkersGui.getGraphics());
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}
}
我只是不明白為什么pieces數組在變化並且paintComponent方法正在運行,但是pieces根本不移動。
您的問題是因為在繪畫作品時,您使用了存儲在其中的x
和y
值。 但是,當您移動棋子時,您永遠不會更新它們。 您只需將其放在陣列的新位置,同時仍包含其舊位置。
要解決此問題,您應該在移動它時更新這些值,或者(不太可能發生斷裂的方式)從陣列中的位置而不是從塊中存儲的值中找出要繪制的正確位置。
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