如何使JComboBox表编辑器具有普通JComboBox的设计？ [英] How to make a JComboBox table editor have the design of an ordinary JComboBox?

问题描述

我有一个 JComboBox 用作 JTable 中的编辑器。在图片中，您可以在标有 Produs 的列中看到它们。我想在网格单元格中使用独立的 JComboBox 的设计，特别是组合框的右侧部分，网格单元格中缺少三角形，所以用户将知道网格单元格是组合框而无需单击其中一个。如何将 JComboBox （ IsBackFlush ）的设计应用于 JComboBoxes ？

I have a JComboBox used as an editor in a JTable. In the picture you can see them in the column labeled Produs. I would like to use the design of the stand-alone JComboBox in the grid cells, particularly the right part of the combo box where the triangle is missing from the grid cells, so a user will know that the grid cells are combo boxes without having to click on one of them. How can I apply the design of the JComboBox (IsBackFlush) to the JComboBoxes in the grid?

基本上，如何根据<$的设计设计 comboBox2 C $ C> comboBox1 ？谢谢。

Essentially, how can I design comboBox2 based on the design of comboBox1? Thanks.

推荐答案

使用完整的示例一个共同的参考框架，请注意 ITEM_COL 列中未选定单元格的出现是由于 默认渲染器 。独立 JComboBox 的典型箭头按钮仅在引发单元格编辑器时出现，例如单击单元格或按 Space 时细胞被选中。您可以在自定义渲染器中添加三角形：

Working from this complete example as a common frame of reference, note how the appearance of unselected cells in the ITEM_COL column is due to the default renderer. The arrow button typical of a stand-alone JComboBox only appears when the cell's editor is evoked, as by clicking on the cell or pressing Space when the cell is selected. You can add a triangle in a custom renderer:

final JComboBox combo = new JComboBox(items);
TableColumn col = table.getColumnModel().getColumn(ITEM_COL);
col.setCellRenderer(new DefaultTableCellRenderer(){

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
        JLabel label = (JLabel) super.getTableCellRendererComponent(table,
            value, isSelected, hasFocus, row, column);
        label.setIcon(UIManager.getIcon("Table.descendingSortIcon"));
        return label;
    }
});

附录：由于@aterai而出现更完整的示例其他。

Addendum: A more complete example due to @aterai is seen here.

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