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JLabel image isn't updating when JComboBox selection changes.

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Join Date: May 2008

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gotm

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Re: JLabel image isn't updating when JComboBox selection changes.

#11

Aug 12th, 2009

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Originally Posted by VernonDozier

I assume you have no messages like this:

nope no errors it just doesnt change

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VernonDozier VernonDozier is offline

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Re: JLabel image isn't updating when JComboBox selection changes.

#12

Aug 12th, 2009

When I first ran your program, before I realized what I had to do, I stuck this line at the top of actionPerformed:

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System.out.println ("Inside actionPerformed");
System.out.println ("Inside actionPerformed");

so it would display every time I selected from the Drop-Down. Have you done this, and does it display?

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llemes4011 llemes4011 is offline

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Re: JLabel image isn't updating when JComboBox selection changes.

#13

Aug 12th, 2009

Okay, here's what I've found.

1) DON'T USE PACK()!
JFrame.pack() is good some times, but NOT here. Use JFrame.setSize(int, int) (I set it to 250 x 135, and it looks great). using pack here makes it look squished (which it is!).

2) Set the default recipe
In your constructor (after creating the test recipe, and adding it to the JComboBox), set the selected index/item to 0 or test respectively. (that will ensure that the ratings show up at creation)

3) Don't use 2 JLabels for the rating!
Find a way to use one, and show the word "Rating: ", and the stars, or create a class that can display them horizontaly:

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class RatingLabel extends JPanel{
    ImageIcon stars;
 
    RatingLabel(int stars){
        switch(stars){
            // Go through cases to load images...
        }
        this.add(new JLabel("Rating"));
        this.add(nww JLabel(stars));
    }
    public void setRating(int stars){
        //same as switch above
    }
    // Other methods to add/remove stars, ect
}
class RatingLabel extends JPanel{
    ImageIcon stars;

    RatingLabel(int stars){
        switch(stars){
            // Go through cases to load images...
        }
        this.add(new JLabel("Rating"));
        this.add(nww JLabel(stars));
    }
    public void setRating(int stars){
        //same as switch above
    }
    // Other methods to add/remove stars, ect
}