如何在JPanel中的mouselistener类中注册两点？

Question

public class Tiles extends JPanel implements MouseListener {

Color c2, cc, tmp;
boolean isWhite, hasChecker, isHighlighted;
int i, j;
ArrayList<Point> al = new ArrayList<Point>();
ArrayList<Point> TempArray = new ArrayList<Point>();
Point start;
Point temp;

public Tiles(Color c, Point s){

     this.setSize(75, 75);
     this.setLayout(null);
     this.addMouseListener(this);
     this.c2 = c;
     tmp = c2;
     this.start = s;

  }

public void setWhite(boolean isWhite){
    this.isWhite = isWhite;
}

public void hasChecker(boolean hasChecker){
    this.hasChecker = hasChecker;
}

public void paintComponent(Graphics g){
    Graphics2D g2 = (Graphics2D)g;
    super.paintComponent(g2);
    //if(isClicked == true)
    //  highlightPossibleMoves(start);
    drawTile(g2);
    if(hasChecker == true)
        addCheckers(g2);



}

public void drawTile(Graphics2D g2){

    g2.setColor(c2);

    g2.fillRect(3, 3, 75, 75);

}

public void addCheckers(Graphics2D g2){
    if(isWhite == true){
        g2.setColor(Color.white);
    }
    else{
        g2.setColor(Color.black);
    }
    Ellipse2D.Double circle = new Ellipse2D.Double(13, 11, 50, 50);
    g2.fill(circle);
}

public boolean highlightPossibleMoves(Point start){
    al = LOA.b.getPossibleMoves(start);
    if(!al.isEmpty()){
        for(int i = 0; i<al.size(); i++){
            LOA.Jboard[al.get(i).getY()][al.get(i).getX()].c2 = Color.green;
            LOA.Jboard[al.get(i).getY()][al.get(i).getX()].repaint();
        }
        return true;
    }
    return false;
}

public Point getThisPoint(){
    return this.start;
}

public boolean isPossible(Point p){
    if (TempArray.contains(p)){
        System.out.println("contains");
        return true;
    }
    return false;
}

    @Override
public void mouseClicked(MouseEvent e) {

}

@Override
public void mouseEntered(MouseEvent arg0) {

}

@Override
public void mouseExited(MouseEvent arg0) {

}

@Override
public void mousePressed(MouseEvent e) {

}

@Override
public void mouseReleased(MouseEvent e) {
        if(isHighlighted = true){
            LOA.initBoard();
        }
        if(highlightPossibleMoves(getThisPoint()) == true){
            this.isHighlighted = true;
        }           
        if(isPossible(getThisPoint()))
            LOA.move(this.temp, getThisPoint());
        else{
            System.out.println("x =" + this.start.getX() + "y =" + this.start.getY());
            this.temp = new Point(getThisPoint().getX(), getThisPoint().getY());
        }
        this.repaint();
        this.validate();                        
}
}

Answer 1

我可以给出相同的业务逻辑：

• 创建带有网格布局的板
• 而不是JPanels，我认为是JButtons（根据它们的位置设置JButtons的名称a1、a2、a3..）
• 一旦用户单击按钮，将所选按钮的颜色更改为绿色（您可以轻松地存储所选按钮的名称，并知道选择了什么按钮。您还可以将计数数更新为1，以便跟踪该部分尚未移动）
• 此后，当用户单击另一个按钮时，即用户选择另一个有效的网格…您可以在黑板上移动

这样，您不必担心保存一个点，而是保存一个选定的组件