恕我直言,使用布局和组件并不是解决您问题的好方法,就我个人而言,我倾向于使用自定义绘画解决方案。
从一件作品的基本概念开始,它需要知道它的位置,它的大小,它的颜色,能够绘制自己并且可能是可重新定位的,比如......
public interface Piece {
public Rectangle getBounds();
public Color getColor();
public void setLocation(Point point);
public void paint(Graphics2D g2d);
}
由此,您可以定义您需要的形状,例如......
public abstract class AbstractPiece implements Piece {
private Rectangle bounds;
private Color color;
@Override
public void setLocation(Point point) {
bounds.setLocation(point);
}
@Override
public Rectangle getBounds() {
return bounds;
}
@Override
public Color getColor() {
return color;
}
public void setBounds(Rectangle bounds) {
this.bounds = bounds;
}
public void setColor(Color color) {
this.color = color;
}
}
public class Square extends AbstractPiece {
public Square(Point location, int size, Color color) {
Rectangle bounds = new Rectangle();
bounds.setLocation(location);
bounds.setSize(size, size);
setBounds(bounds);
setColor(color);
}
@Override
public void paint(Graphics2D g2d) {
g2d.setColor(getColor());
g2d.fill(getBounds());
g2d.setColor(Color.GRAY);
Rectangle bounds = getBounds();
g2d.drawLine(bounds.x + (bounds.width / 2), bounds.y, bounds.x + (bounds.width / 2), bounds.y + bounds.height);
g2d.drawLine(bounds.x, bounds.y + (bounds.height / 2), bounds.x + bounds.width, bounds.y + (bounds.height / 2));
}
}
这只是一个基本的正方形,没什么花哨的,但是,它是独立的,易于创建和管理。您可以使用这个简单的图案创建您喜欢的任何形状组合,最终,您的板类不会关心它,它只需要它占用的空间以及如何绘制它,为此,您需要一些一种管理所有这些形状的容器......
public class PuzzelPane extends JPanel {
private List<Piece> pieces;
public PuzzelPane() {
Dimension size = getPreferredSize();
pieces = new ArrayList<>(25);
Point location = new Point((size.width - 50) / 2, (size.width - 50) / 2);
pieces.add(new Square(location, 50, Color.BLUE));
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
for (Piece piece : pieces) {
Graphics2D g2d = (Graphics2D) g.create();
piece.paint(g2d);
g2d.dispose();
}
}
}
这是一个非常简单的概念,它有一个List
保持所有可用的形状并简单地循环它以将它们绘制在paintComponent
method
将其与来自的想法结合起来这个例子 https://stackoverflow.com/questions/33402446/how-to-click-and-drag-something-without-it-deselecting/33403429#33403429 and 这个例子 https://stackoverflow.com/questions/33163298/dragging-image-using-mousedrag-method/33163542#33163542现在您可以拖动形状