[英]Jtable with different types of cells depending on data type
How can I implement a JTable with different types of cell editors depending on the type of input a particular row is displaying? 如何根据特定行显示的输入类型实现具有不同类型的单元格编辑器的JTable?
For example 例如
Currently I have implemented the AbstractTableModel
, which takes a set of custom field objects from my object and adds rows to the table. 目前我已经实现了
AbstractTableModel
,它从我的对象中获取一组自定义字段对象,并向表中添加行。 I would like to further customize my table by setting specific types of cells. 我想通过设置特定类型的单元格来进一步自定义我的表格。 I can determine which cell type to use based on the type of field that row contains.
我可以根据行包含的字段类型确定要使用的单元格类型。
The table model is dynamically created at run-time. 表模型是在运行时动态创建的。
- some rows could be checkboxes (for boolean types)
一些行可以是复选框(对于布尔类型)
- some rows could be comboboxes (if I want to provide a fixed set of options to choose from)
有些行可能是组合框(如果我想提供一组固定的选项可供选择)
- some rows could be text fields (if I allow arbitrary data).
某些行可以是文本字段(如果我允许任意数据)。
for example 例如
import java.awt.EventQueue;
import java.util.Date;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
public class EachRowRendererEditor {
private JFrame frame = new JFrame("EachRowRendererEditor");
private String[] columnNames = {"Type", "Value"};
private Object[][] data = {
{"String", "I'm a string"},
{"Date", new Date()},
{"Integer", new Integer(123)},
{"Double", new Double(123.45)},
{"Boolean", Boolean.TRUE}};
private JScrollPane scrollPane;
private JTable table;
public EachRowRendererEditor() {
table = new JTable(data, columnNames) {
private static final long serialVersionUID = 1L;
private Class editingClass;
@Override
public TableCellRenderer getCellRenderer(int row, int column) {
editingClass = null;
int modelColumn = convertColumnIndexToModel(column);
if (modelColumn == 1) {
Class rowClass = getModel().getValueAt(row, modelColumn).getClass();
return getDefaultRenderer(rowClass);
} else {
return super.getCellRenderer(row, column);
}
}
@Override
public TableCellEditor getCellEditor(int row, int column) {
editingClass = null;
int modelColumn = convertColumnIndexToModel(column);
if (modelColumn == 1) {
editingClass = getModel().getValueAt(row, modelColumn).getClass();
return getDefaultEditor(editingClass);
} else {
return super.getCellEditor(row, column);
}
}
// This method is also invoked by the editor when the value in the editor
// component is saved in the TableModel. The class was saved when the
// editor was invoked so the proper class can be created.
@Override
public Class getColumnClass(int column) {
return editingClass != null ? editingClass : super.getColumnClass(column);
}
};
table.setPreferredScrollableViewportSize(table.getPreferredSize());
scrollPane = new JScrollPane(table);
frame.add(scrollPane);
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
EachRowRendererEditor eeee = new EachRowRendererEditor();
}
});
}
}
Create a custom class implementing javax.swing.table.TableCellRenderer, which displays the values using the control you want to display with depending on the data type. 创建一个实现javax.swing.table.TableCellRenderer的自定义类,该类根据数据类型使用您要显示的控件显示值。 Use instances of this class as cell renderer (TableColumn.setCellRenderer)
将此类的实例用作单元格渲染器(TableColumn.setCellRenderer)
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