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How can I change the arrow style in a JComboBox

Let's say I want to use a custom image for the arrow in JComboBox, how can I do this?

I understand it's possible using the synth xml files, or maybe even UIManager.put(...), but I don't know how. All I want to do at this time is change the arrow image to something else, either programatically or even just overriding the image it uses. How exactly can I do this?

like image 685
Stephane Grenier Avatar asked Jun 09 '10 17:06

Stephane Grenier


1 Answers

You can override createArrowButton() in BasicComboBoxUI. BasicArrowButton is a convenient starting point.

class ColorArrowUI extends BasicComboBoxUI {

    public static ComboBoxUI createUI(JComponent c) {
        return new ColorArrowUI();
    }

    @Override protected JButton createArrowButton() {
        return new BasicArrowButton(
            BasicArrowButton.SOUTH,
            Color.cyan, Color.magenta,
            Color.yellow, Color.blue);
    }
}

Then install it.

JComboBox combo = new JComboBox();
combo.setUI(ColorArrowUI.createUI(combo));
like image 81
trashgod Avatar answered Oct 04 '22 11:10

trashgod