JCheckBox inside JComboBox?

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Wizumwalt@gmail.com - 11 Aug 2005 19:38 GMT

Can JCheckBox's be put inside a JComboBox?

I'm trying the following, but it's not working ...

---
        myFilter = new JComboBox();
        myFilter.setMaximumSize(myFilter.getPreferredSize());

        b1 = new JCheckBoxMenuItem("test");
        b2 = new JCheckBoxMenuItem("test2");

        myFilter.addItem(b1);
        myFilter.addItem(b2);

        toolBar.add(myFilter);

---

Any help much appreciated.

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Thomas Hawtin - 11 Aug 2005 20:23 GMT

> Can JCheckBox's be put inside a JComboBox?
>
[quoted text clipped - 11 lines]
>
> toolBar.add(myFilter);

The drop down list of a combobox isn't general purpose popup menu.
Anything to put a check box on it would be a hack.

I can't remember the exact details, but the JComboBox's menu is
implemented by the PL&F as a JList. Your obvious choices are to set a
list cell renderer that paints a check box as required or to replace or
supplement the list with your own component(s). Alternatively don't use
a JCheckBox at all.

Tom Hawtin

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Unemployed English Java programmer
http://jroller.com/page/tackline/

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