问题
I have a Jtable with a checkbox in first column. I want to strikethrough text of a row when the checkbox is selected. (eg same as we do in microsoft outlook when our task is complete.) I have tried using AttributeString, but not able to do it.
Can anyone please guide me to solve it?
String strStrike;
AttributedString as;
public void setTextStrikeThrough() {
for(int r=0;r< taskcells.length;r++) {
if (ttable.getValueAt(r,0).equals(Boolean.TRUE)) {
for(int c=2;c<7;c++) {
strStrike+=taskcells[r][c-1];
}//end inner for as=new
AttributedString(strStrike);
as.addAttribute(TextAttribute.STRIKETHROUGH,
TextAttribute.STRIKETHROUGH_ON);
as.getIterator();
}//end if
}//end for
}
I am not getting exactly where to call this method. I want to strikethrough text of a row when checkbox of that row has been checked.
回答1:
I don't know that an ActionListener will work well for a JCheckBox in a JTable since the check box isn't a real button but rather a rendering of a checkbox. Perhaps playing with the table model will help. For instance you can use HTML to display a strike through of Strings displayed in table cells. For instance below I create a custom TableModel that extends DefaultTableModel and holds rows with a Boolean object followed by objects of a TextWrapper class that I've created that changes its toString result depending on a boolean.
e.g.,
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
public class StrikeThroughRow {
public static final Object[][] DATA = {{Boolean.TRUE, "Monday", "fe"},
{Boolean.FALSE, "Tuesday", "fi"}, {Boolean.TRUE, "Wednesday", "fo"},
{Boolean.FALSE, "Thursday", "fum"}, {Boolean.TRUE, "Friday", "foo"}};
public StrikeThroughRow() {
}
private static void createAndShowUI() {
JTable table = new JTable(new StrikeThroughModel(DATA));
JScrollPane scrollpane = new JScrollPane(table);
JFrame frame = new JFrame("StrikeThroughRow");
frame.getContentPane().add(scrollpane);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
createAndShowUI();
}
});
}
}
class StrikeThroughModel extends DefaultTableModel {
public StrikeThroughModel(Object[][] data) {
super(new String[]{"Check", "Work Day", "Giant Speak"}, 0);
for (int i = 0; i < data.length; i++) {
Vector<Object> rowVect = new Vector<Object>();
rowVect.add(data[i][0]);
if (data[i].length > 1) {
for (int j = 1; j < data[i].length; j++) {
rowVect.add(new TextWrapper(data[i][j].toString(), (Boolean)data[i][0]));
}
}
addRow(rowVect);
}
}
@Override
public Class<?> getColumnClass(int columnIndex) {
if (columnIndex == 0) {
return Boolean.class;
}
return super.getColumnClass(columnIndex);
}
@Override
public void setValueAt(Object value, int row, int column) {
if (column == 0) {
for (int i = 1; i < getColumnCount(); i++) {
TextWrapper textWrapper = (TextWrapper) getValueAt(row, i);
textWrapper.setStrikeThrough((Boolean) value);
fireTableCellUpdated(row, i);
}
}
super.setValueAt(value, row, column);
}
}
class TextWrapper {
private String text;
private boolean strikeThrough = false;
public TextWrapper(String text) {
this.text = text;
}
public TextWrapper(String text, boolean strikeThrough) {
this(text);
this.strikeThrough = strikeThrough;
}
@Override
public String toString() {
if (strikeThrough) {
return "<html><strike>" + text + "</html></strike>";
}
return text;
}
public void setStrikeThrough(boolean strikeThrough) {
this.strikeThrough = strikeThrough;
}
}
I'm betting that there are better solutions including creating a custom renderer for your cells, but the code above offers a quick and dirty fix.
回答2:
Here is how you can create a "strike through font":
Map attributes = component.getFont().getAttributes();
attributes.put(TextAttribute.STRIKETHROUGH, TextAttribute.STRIKETHROUGH_ON);
component.setFont( new Font(attributes) );
One way to apply the font is to use the Table Row Rendering approach. Take a look at the background color example. Instead of setting the background of the renderer you can set the Font.
Otherwise you would need to create a custom renderer for the columns in your table to use the appropriate Font.
回答3:
Add a listener to the checkbox which will add/remove the from the label. Here is an example of box and label maybe helpful:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractButton;
import javax.swing.BorderFactory;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class check {
public static void main(String args[]) {
JFrame frame = new JFrame("for bsm");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JCheckBox box = new JCheckBox("check me");
final JLabel label = new JLabel("<html>text</html>");
label.setFont(new Font("helvetica", Font.PLAIN, 12));
label.setForeground(new Color(50, 50, 25));
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
AbstractButton abstractButton = (AbstractButton) actionEvent.getSource();
if(abstractButton.getModel().isSelected())
label.setText(label.getText().replace("<html>", "<html><strike>").replace("</html>", "</strike></html>"));
else
label.setText(label.getText().replace("<html><strike>", "<html>").replace("</strike></html>", "</html>"));
}
};
box.addActionListener(actionListener);
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout(10, 10));
panel.add(label, BorderLayout.NORTH);
panel.add(box, BorderLayout.SOUTH);
panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
frame.add(panel);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
来源：https://stackoverflow.com/questions/5277220/how-to-strikethrough-text-of-a-selected-rowhaving-checkbox-in-first-column-of