在Java中使用Basic箭头按钮类

Question

BasicArrowButton是一个类,是Java SE的一部分.BasicArrowButton在指定方向上显示单个箭头.我想覆盖该类,保留现有方法,但让基本箭头按钮显示双箭头而不是单箭头.例如,请参见以下URL www.tiresias.org/images/ff.jpg.我要做的就是改变这个图标的绘制方式.

谢谢,

Answer 1

子类BasicArrowButton并覆盖paintTriangle.您可以尝试两次调用 BasicArrowButton的paintTriangle方法来获取三角形.例如:

public static class Bidriectional extends BasicArrowButton {
  private static final long serialVersionUID = 1L;

  public Bidriectional() {
   // This does not matter, we'll override it anyways.
   super(SwingConstants.NORTH);
  }

  @Override
  public void paintTriangle(Graphics g, int x, int y, int size,
    int direction, boolean isEnabled) {

   super.paintTriangle(g, x - (size / 2), y, size, SwingConstants.EAST, isEnabled);
   super.paintTriangle(g, x + (size / 2), y, size, SwingConstants.EAST, isEnabled);
  }
 }

应该给你一个看起来像这样的按钮:

截图http://www.amnet.net.au/~kgoh/images/double_arrow.jpg