Hi,
I have implemented a silly game. To display who is the winner I have tried JOptionPane but the program freezes instead. Thus I thought to customize my own dialog so the user, togheter with the message, could also choose whether run the game again or exit. Could anyone post a link where I could look up the above issue, please?
Regards
here's an example of a common usage - confirm when exiting an app
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing
{
public void buildGUI()
{
JFrame f = new JFrame();
f.setSize(400,300);
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
f.setVisible(true);
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we){
String[] options = {"Yes","No","Not Sure"};
int selection = JOptionPane.showOptionDialog(null,"Exit Application?",
"",-1,-1,null,options,"Yes");
if(selection == 0) System.exit(0);
}
});
}
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new Testing().buildGUI();
}
});
}
}
Not quite. I was thinking to have a JDialog (triggered by the counter variable) which deliveries a message like
Player 1 WIN! Do you want to play again?
and the two button:
Yeswhich will restart the application
Nowhich will close the application
Regards
> Not quite.
the principle is the same.
something triggers the display of a JOptionPane.
as you just want YES/NO, a JOptionPane.showConfirmDialog() with YES_NO_OPTION
is what you'd use.
then it's just a matter of checking the return value of the optionPane
if(selection == JOptionPane.YES_OPTION) //reset/restart game
else System.exit(0);
perhaps the easiest way is to put all of the stuff when you first start the game into
its own method, say reset(), which is called after the gui is constructed
e.g.
sets all variables to their initial state/value
clears any text in textComponents
clears any drawing areas
etc
etc
now, if 'new game' is selected, you just call the reset() method, and you're away
cool! it works as it should!!!
Here is the code:
Object[] options = {"Yes","No"};
int select = javax.swing.JOptionPane.showOptionDialog(this, str + " Do you wish to play again?", "Yum!", -1, -1, new javax.swing.ImageIcon(getClass().getResource("/images/Icon.gif")), options, "Yes");
if(select == javax.swing.JOptionPane.YES_OPTION)
reset();
else System.exit(0);
Would you be so kind to explain me what "-1s" are there for?
Regards
refer api docs for detailed explanation
[url]
http://java.sun.com/j2se/1.5.0/docs/api/javax/swing/JOptionPane.html#showOptionDialog
(java.awt.Component,%20java.lang.Object,%20java.lang.String,%20int,%20int,%20javax.swing.Icon,%20java.lang.Object[],%20java.lang.Object)
[/url]
for just yes/no, you are better off using showConfirmDialog().
one problem you may encounter with your current code is the comparison to YES_OPTION.
the return value from showOptionDialog is the button number associated with
its index in the array. it works in the example because YES_OPTION is 0,
and the option "yes" is at 0. Make your array like this (swap them)
Object[] options = {"No","Yes"};
now press 'Yes' and see if you get the same result.
in a confirmDialog, the 'Yes' button will always return YES_OPTION.
use the code in reply #4, and change windowClosing() to this
public void windowClosing(WindowEvent we){
int selection = JOptionPane.showConfirmDialog(
null,"Exit Application?","",JOptionPane.YES_NO_OPTION);
if(selection == JOptionPane.YES_OPTION) System.exit(0);
}