java - 自定义JFileChooser : FileFilters lost

Question

我最终使用 Eng. 的方法在 JFileChooser 的 JList 和 JComboBoxes 中自定义了选择颜色。福阿德建议here

public void customizeJFileChooser(Container c)
    {
        Component[] cmps = c.getComponents();
        for (Component cmp : cmps)
        {
            if (cmp instanceof JList)
            {
                ((JList)cmp).setSelectionBackground(new Color(164,164,164));
            }
            if (cmp instanceof JComboBox)
            {
                ((JComboBox)cmp).setRenderer(new DefaultListCellRenderer() {
                    public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
                        Component comp = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
                        if (isSelected)
                        comp.setBackground(new Color(164,164,164));
                        return comp;
                        }
                        });
            }
            if (cmp instanceof Container)
            {
                customizeJFileChooser((Container) cmp);
            }
        }
    }

对于颜色效果很好，但是...现在我对 FileFilter 名称有问题，如您在上面看到的:

如果我不调用customizeJFileChooser，它就会得到正确的名称，所以它一定是该方法的问题。有什么帮助吗？

Answer 1

ListCellRenderer 很可能不仅仅是一个 DefaultListCellRenderer，而是一个派生类。因此，解决方案是获取原件并将其包装，而不是替换它。

        if (cmp instanceof JComboBox)
        {
            ((JComboBox)cmp).setRenderer(new DefaultListCellRenderer() {
                private ListCellRenderer superLCR = ((JComboBox)cmp).getRenderer();
                public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
                    Component comp = superLCR.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
                    if (isSelected)
                        comp.setBackground(new Color(164,164,164));
                    return comp;
                }
            });
        }