如何使 JTable 列包含复选框？

发布于 2024-09-03 07:36:40 字数 794 浏览 14 评论 0原文

前言：我对 java 很糟糕，对 java ui 组件更糟糕。

我找到了几个关于如何向表格添加按钮的不同教程，但是我在添加复选框方面遇到了困难。我需要有一列在默认情况下绘制一个选中的文本框（我认为单元格渲染器可以处理该文本框），然后单击复选框，取消选中该框，重新绘制所述框，并在我可以跟踪的地方触发一个事件。

目前我有一个自定义单元渲染器：

public class GraphButtonCellRenderer extends JCheckBox implements TableCellRenderer {
public GraphButtonCellRenderer() {
}
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    if(isSelected)
        setSelected(true);
    else
        setSelected(false);
    setMargin(new Insets(0, 16, 0, 0));
    setIconTextGap(0);

    setBackground(new Color(255,255,255,0));
    return this;
}}

当前处理绘制复选框，但仅在选择该行时勾选和取消勾选该框。但我不知道如何处理这些事件。我真正要问的是可能是一个关于如何将复选框干净地添加到 JTable 的好教程的链接。非常感谢任何帮助:)

原文

Preface: I am horrible with java, and worse with java ui components.

I have found several different tutorials on how to add buttons to tables, however I am struggling with adding checkboxes. I need to have a column that draws a text box ticked on default (cell renderer i think handles that), then on click of tickbox, unticks the box, redraws said box, and fires off an event somewhere I can track.

currently I have a custom cellrenderer:

public class GraphButtonCellRenderer extends JCheckBox implements TableCellRenderer {
public GraphButtonCellRenderer() {
}
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    if(isSelected)
        setSelected(true);
    else
        setSelected(false);
    setMargin(new Insets(0, 16, 0, 0));
    setIconTextGap(0);

    setBackground(new Color(255,255,255,0));
    return this;
}}

Which currently handles drawing the tick box, but only ticks and unticks the box if that row is selected. But I don't know how to handle the events. Really what I am asking is possibly a link to a good tutorial on how to add checkboxes cleanly to a JTable.
Any assist is greatly appreciated :)

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日裸衫吸 2024-09-10 07:36:40

无需创建您自己的表格渲染器。这是一个更简单的示例。只需创建一个自定义表模型，并为给定的列返回 Boolean 类：

public Class getColumnClass(int column)

如果您希望该列可编辑，则返回 true，

public boolean isCellEditable(int row, int column)

JTable 会为您处理渲染。

另一个示例在这里。

There's no need to create your own table renderer. Here's a simpler example. Just create a custom table model and for a given column return the class Boolean for:

public Class getColumnClass(int column)

If you want the column to be editable, return true for

public boolean isCellEditable(int row, int column)

JTable takes care of the rendering for you.

Another example is here.

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沉默的熊 2024-09-10 07:36:40

正如 Peter 所说，使用扩展的 DefaultTableModel 类很容易，例如：

class NewTableModel extends DefaultTableModel{
        public Class<?> getColumnClass(int columnIndex) {
            return getValueAt(0, columnIndex).getClass();
        }
    }

As Peter say, its easy using extended DefaultTableModel class, ex:

class NewTableModel extends DefaultTableModel{
        public Class<?> getColumnClass(int columnIndex) {
            return getValueAt(0, columnIndex).getClass();
        }
    }

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