CloudStrife209
asked on
Java JList issue
I've added the following code to a JList and am now unable to select individual items in the list
Any Ideas? For reference getANZIC returns a string value
Any Ideas? For reference getANZIC returns a string value
@SuppressWarnings("serial")
class MyCellRenderer extends JLabel implements ListCellRenderer {
public Component getListCellRendererComponent(
JList list,
Object value, // value to display
int index, // cell index
boolean isSelected, // is the cell selected
boolean cellHasFocus) // the list and the cell have the focus
{
setText(((Occupation)value).getANZIC());
return this;
}
}
ASKER
here you go
JList listing = new JList(occupationList);
listing.setCellRenderer(new MyCellRenderer());
What means unable to select?
How do you judge that it is not selecting?
Can you post more of your code so that I copuld try
to run it myself?
How do you judge that it is not selecting?
Can you post more of your code so that I copuld try
to run it myself?
It would work if you extend DefaultListCellRenderer.
Try this code:
Try this code:
import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.Vector;
public class JListTest extends JFrame {
public JListTest() {
super("test");
Vector<Occupation> ar = new Vector<Occupation>();
ar.add(new Occupation("MD"));
ar.add(new Occupation("PD"));
ar.add(new Occupation("LD"));
JList l = new JList(ar);
l.setCellRenderer(new MyCellRenderer());
Container c = this.getContentPane();
c.add(l);
this.setSize(300,300);
this.setVisible(true);
}
public static void main(String[] args) {
new JListTest();
}
}
class Occupation {
String text;
Occupation(String s){
text = s;
}
public String toString(){
return text;
}
}
@SuppressWarnings("serial")
class MyCellRenderer extends DefaultListCellRenderer{
public Component getListCellRendererComponent(
JList list,
Object value, // value to display
int index, // cell index
boolean isSelected, // is the cell selected
boolean cellHasFocus) // the list and the cell have the focus
{
System.out.println("value: " + value);
System.out.println(isSelected);
System.out.println(cellHasFocus);
if(isSelected)this.setBackground(Color.blue);
else this.setBackground(Color.white);
this.setText(((Occupation)value).toString());
return this;
}
}
ASKER CERTIFIED SOLUTION
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This is based on your code and it is working.
You of course need to add if(isSelected)... else
and another thing which turns out to be impiortnat
is setOpaque(true) in the constructor.
You of course need to add if(isSelected)... else
and another thing which turns out to be impiortnat
is setOpaque(true) in the constructor.
import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.Vector;
public class JListTest extends JFrame {
public JListTest() {
super("test");
Vector<Occupation> ar = new Vector<Occupation>();
ar.add(new Occupation("MD"));
ar.add(new Occupation("PD"));
ar.add(new Occupation("LD"));
JList l = new JList(ar);
l.setCellRenderer(new MyCellRenderer());
Container c = this.getContentPane();
c.add(l);
this.setSize(300,300);
this.setVisible(true);
}
public static void main(String[] args) {
new JListTest();
}
}
class Occupation {
String text;
Occupation(String s){
text = s;
}
public String toString(){
return text;
}
}
class MyCellRenderer extends JLabel implements ListCellRenderer {
public MyCellRenderer() {
setOpaque(true);
}
public Component getListCellRendererComponent(
JList list,
Object value, // value to display
int index, // cell index
boolean isSelected, // is the cell selected
boolean cellHasFocus) // the list and the cell have the focus
{
if (isSelected) {
setBackground(Color.blue);
setForeground(Color.black);
} else {
setBackground(Color.white);
setForeground(Color.black);
}
setText(((Occupation)value).toString());
return this;
}
}
ASKER
Thanks
>I've added the following code to a JList
Please, post your code the part were you craete the list and set the renderer