[英]Celleditor (JComboBox) in a specific row of a JTable
我不知道如何在特定行中設置一個jcombobox ...現在我已經為所有行設置了這個jcombobox,但是我只希望在一行中設置它:
JComboBox cc = new JComboBox();
cc.addItem(jComboBox5.getSelectedItem()+"/"+jComboBox6.getSelectedItem()+"/"+jComboBox7.getSelectedItem()+" "+jComboBox1.getSelectedItem()+"."+jComboBox2.getSelectedItem());
jTable1.getColumnModel().getColumn(3).setCellEditor(new DefaultCellEditor(cc));
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("CLICCA PER LE DATE");
jTable1.getColumnModel().getColumn(3).setCellRenderer(renderer);
但我只想要一行:
重寫getCellEditor(...)方法以返回給定行的特定編輯器:
import java.awt.*;
import java.awt.event.*;
import java.util.List;
import java.util.ArrayList;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;
public class TableComboBoxByRow extends JFrame
{
List<TableCellEditor> editors = new ArrayList<TableCellEditor>(3);
public TableComboBoxByRow()
{
// Create the editors to be used for each row
String[] items1 = { "Red", "Blue", "Green" };
JComboBox comboBox1 = new JComboBox( items1 );
DefaultCellEditor dce1 = new DefaultCellEditor( comboBox1 );
editors.add( dce1 );
String[] items2 = { "Circle", "Square", "Triangle" };
JComboBox comboBox2 = new JComboBox( items2 );
DefaultCellEditor dce2 = new DefaultCellEditor( comboBox2 );
editors.add( dce2 );
String[] items3 = { "Apple", "Orange", "Banana" };
JComboBox comboBox3 = new JComboBox( items3 );
DefaultCellEditor dce3 = new DefaultCellEditor( comboBox3 );
editors.add( dce3 );
// Create the table with default data
Object[][] data =
{
{"Color", "Red"},
{"Shape", "Square"},
{"Fruit", "Banana"},
{"Plain", "Text"}
};
String[] columnNames = {"Type","Value"};
DefaultTableModel model = new DefaultTableModel(data, columnNames);
JTable table = new JTable(model)
{
// Determine editor to be used by row
public TableCellEditor getCellEditor(int row, int column)
{
int modelColumn = convertColumnIndexToModel( column );
if (modelColumn == 1 && row < 3)
return editors.get(row);
else
return super.getCellEditor(row, column);
}
};
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
}
public static void main(String[] args)
{
TableComboBoxByRow frame = new TableComboBoxByRow();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
}
}
更新:在測試我的(可能是不完整的)答案時,我遇到了一個非常好的SO問題,我認為它將比我能提供的要好得多: 將JComboBox放入JTable
另一個更新:我再次閱讀了您的問題,我意識到您要求輸入特定的行 。 我能想到的唯一方法是創建自定義CellEditor,如下所示:
private static class MyCellEditor extends AbstractCellEditor implements TableCellEditor {
DefaultCellEditor other = new DefaultCellEditor(new JTextField());
DefaultCellEditor checkbox = new DefaultCellEditor(new JComboBox(new Object[] {"abc"}));
private DefaultCellEditor lastSelected;
@Override
public Object getCellEditorValue() {
return lastSelected.getCellEditorValue();
}
@Override
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
if(row == 0) {
lastSelected = checkbox;
return checkbox.getTableCellEditorComponent(table, value, isSelected, row, column);
}
lastSelected = other;
return other.getTableCellEditorComponent(table, value, isSelected, row, column);
}
}
在此示例中,自定義CellEditor實際上是兩個編輯器,並且根據選擇的行,特定的編輯器將獲得調用(無論是圖形上還是字面上)。 我承認lastSelected
似乎有點lastSelected
,但是老實說,我找不到找到返回哪個Editor值的更簡單方法(因為getCellEditorValue
沒有參數)。
為了使您的表“正確”顯示,您可能還必須對Renderer進行一些操作(因為Renderer可能會或可能不知道將JComboBox的選定值顯示為初始值)。 這取決於您如何初始化實際表中的數據。
為了完整起見,我的原始答案如下:
您可以將JComboBox組件添加到使用該行 addRow
上的TableModel如下所示: 如何在JTable中添加行?
另請參閱: http : //docs.oracle.com/javase/tutorial/uiswing/components/table.html
我認為主要的問題是您將列編輯器/渲染器的思想與將存儲在每一行中的實際數據混合在一起。
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