如何在编辑时选择JTable单元格中的所有文本 [英] How to select all text in JTable cell when editing
问题描述
我想让我的可编辑JTable中的编辑器在开始编辑时选择单元格中的所有文本。我尝试了一些事情，都围绕从TableCellEditor.getTableCellEditorComponent方法返回的组件上调用JTextComponent.selectAll（）。我尝试过的所有东西都没有。
I would like to have the editor in my editable JTables select all text in the cell when starting to edit. I have tried a couple of things that all revolve around calling JTextComponent.selectAll() on the component that is returned from the TableCellEditor.getTableCellEditorComponent method. None of the things I tried worked.
在我的最新尝试中，我改变了Swing教程中的SimpleTableDemo类，以使用调用selectAll方法的自定义TableCellEditor。在调试器中，我可以看到正在调用selectAll（）方法，但表仍然进入编辑模式而不选择单元格中的文本（或者可能在显示之前清除选择）。该代码如下。谁能告诉我哪里出错？
In my latest attempt, I altered the SimpleTableDemo class from the Swing tutorial to use a custom TableCellEditor that calls the selectAll method. In the debugger I can see that the selectAll() method is being called, but the table still goes into edit mode without selecting the text in the cell (or perhaps the selection is being cleared before display). That code is below. Can anybody tell me where I'm going wrong?
import javax.swing.DefaultCellEditor;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.text.JTextComponent;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class SimpleTableDemo extends JPanel {
private boolean DEBUG = false;
public SimpleTableDemo() {
super(new GridLayout(1, 0));
String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
Object[][] data = {
{"Kathy", "Smith", "Snowboarding", new Integer(5), new Boolean(false)},
{"John", "Doe", "Rowing", new Integer(3), new Boolean(true)},
{"Sue", "Black", "Knitting", new Integer(2), new Boolean(false)},
{"Jane", "White", "Speed reading", new Integer(20), new Boolean(true)},
{"Joe", "Brown", "Pool", new Integer(10), new Boolean(false)}
};
final JTable table = new SelectingTable(data, columnNames);
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
if (DEBUG) {
table.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
printDebugData(table);
}
});
}
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Add the scroll pane to this panel.
add(scrollPane);
}
private void printDebugData(JTable table) {
int numRows = table.getRowCount();
int numCols = table.getColumnCount();
javax.swing.table.TableModel model = table.getModel();
System.out.println("Value of data: ");
for (int i = 0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j = 0; j < numCols; j++) {
System.out.print(" " + model.getValueAt(i, j));
}
System.out.println();
}
System.out.println("--------------------------");
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("SimpleTableDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
SimpleTableDemo newContentPane = new SimpleTableDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
class SelectingTable extends JTable {
public SelectingTable(Object[][] data, String[] columnNames) {
super(data, columnNames);
TableColumnModel model = super.getColumnModel();
for (int i = 0; i < super.getColumnCount(); i++) {
TableColumn tc = model.getColumn(i);
tc.setCellEditor(new SelectingEditor(new JTextField()));
}
}
class SelectingEditor extends DefaultCellEditor {
public SelectingEditor(JTextField textField) {
super(textField);
}
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
Component c = super.getTableCellEditorComponent(table, value, isSelected, row, column);
if (c instanceof JTextComponent) {
JTextComponent jtc = (JTextComponent) c;
jtc.requestFocus();
jtc.selectAll();
}
return c;
}
}
}
}
推荐答案
表选择所有编辑器应该适合你。它是首选解决方案，因此您无需继续创建自定义编辑器。这是包含整数的列应该只接受整数。随你当前的代码
The Table Select All Editor should work for you. It is the preferred solution so you don't have to keep creating custom editors. That is the columns containing integers should only accept integers. With you current code
您的代码部分工作。如果使用F2键开始编辑，则选择文本。但是，当您使用鼠标并双击单元格时，第二个鼠标事件将传递给编辑器，以便将插入符号放置在您单击的位置，这将删除选择。对此的解决方案是：
Your code does work partially. If you start editing using the F2 key, then the text is selected. However, when you use the mouse and double click on the cell then the second mouse event is passed to the editor so the caret can be positioned where you clicked and this removes the selection. A solution for this is:
final JTextComponent jtc = (JTextComponent)c;
jtc.requestFocus();
//jtc.selectAll();
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
jtc.selectAll();
}
});
这篇关于如何在编辑时选择JTable单元格中的所有文本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
