How can I change the background color of an uneditable JTextPane in Java?

问题

I have a JTextPane that haspane.setEditable(false) which forces it to have a 'greyed-out' background color.

After trying setBackground(Color.WHITE) (which doesn't work), I tried looking around the net for an answer but not managed to find one yet.

Can anyone help me on this one please?

回答1:

Note that for some Look and Feel like Nimbus that don't respect background property, you can use this code :

private static class Painter extends javax.swing.plaf.nimbus.AbstractRegionPainter {
    private final Color color;

    private Painter(Color color) {
        this.color = color;
    }
    @Override
    protected AbstractRegionPainter.PaintContext getPaintContext() {
        return new AbstractRegionPainter.PaintContext(null, null, false);
    }

    @Override
    protected void doPaint(Graphics2D g, JComponent c, 
            int width, int height, Object[] extendedCacheKeys) {
        g.setColor(c.isEnabled() ? c.getBackground() : color);
        g.fillRect(0, 0, width, height);
    }
}

This defines a new custom painter for the background. For Nimbus, apply it to your JTextPane jtp this way:

        UIDefaults defaults = UIManager.getLookAndFeelDefaults();
        Painter painter = new Painter(color);
        String key = "TextPane[Disabled].backgroundPainter";
        defaults.put(key, painter);
        jtp.putClientProperty("Nimbus.Overrides", defaults);
        jtp.putClientProperty("Nimbus.Overrides.InheritDefaults", false);

回答2:

Actually try this one:

UIManager.put("TextPane.disabledBackground", Color.WHITE);

I think it should be TextPane.disabledBackground, if not try : TextPane.inactiveBackground

To change text back ground color I believe: Try setDisabledTextColor on the pane.

回答3:

I found out what it was - it was because I had pane.setOpaque(false), I couldn't change the background color without first either removing this or changing it to true.

setBackground(Color.white) worked after altering this.

来源：https://stackoverflow.com/questions/34681453/how-can-i-change-the-background-color-of-an-uneditable-jtextpane-in-java

标签

java

swing

background

jtextpane