java - 如何在JProgressBar中设置 "string painted"的位置

Question

默认情况下，“字符串绘制”出现在 JProgressBar 的中心，但我希望“字符串绘制”应该出现在 JProgressbar 值之后的点，例如，如果 JprogressBar 的值为 0，“字符串绘制”应该出现出现在 JProgressBar 的最左边，请告诉我该怎么做？？？

Answer 1

您需要子类化 JProgressBar...

private class CustomProgressBar extends JProgressBar{

    private static final long serialVersionUID = 1L;
    private boolean isStringToBePainted = false;

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);

        if(isStringToBePainted ){
            Dimension size = CustomProgressBar.this.getSize();
            int x = (int)( size.width * CustomProgressBar.this.getPercentComplete() );
            int height = g.getFontMetrics().getHeight();
            int d = g.getFontMetrics().getDescent();
            int y = (size.height + height)/2-d;
            String text = getString();
            g.setColor(Color.BLACK );
            g.drawString(text, x, 12);
        }
    }

    @Override
    public void setStringPainted(boolean b) {
        // don't do super.setStringPainted(b);
        //super.setStringPainted(b);
        isStringToBePainted=b;
    }
}

也许你稍微调整一下字体颜色，我还没找到合适的字体...