如何设置＆＃34;字符串绘制的位置＆＃34;在JProgressBar

Question

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

Answer 1

你需要继承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;
    }
}

也许你玩了一下字体颜色，我还没找到合适的地方......