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Re: J2ME - List and Font

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On Tue, 20 Sep 2011 15:18:58 -0700, Roedy Green wrote:

>>msglist.setFont(0, f);
>  see http://mindprod.com/jgloss/sscce.html

Good point. 

> I don't see how this could compile.  Your MyMsgList class has no setFont
> method.
> 

I think I should have been more clear about the fact, that this is j2me 
code. The myListClass is extending the List class from 
javax.microedition.lcdui.* and setFont() is a method to List.

http://java.sun.com/javame/reference/apis/jsr118/javax/microedition/lcdui/
List.html

I have uploaded the code to www.tj-software.dk/j2me/sms.zip.

And, I have found a solution to my problem, but I still don't understand 
my original problem, so if someone can enlighten me, I would much 
appreaciate.


So, if I do this:

Font f = Font.getFont(0, 0, Font.SIZE_LARGE);

msglist = new myListClass("messages"); 
/* appends elements to list here */
for (int i=0;i<msglist.size();i++) { 
    msglist.setFont(i, f);
}
msglist.setCommandListener(this);
display.setCurrent(msglist);

then will all element in the list be with large font. That's good and 
proves it's working.

But if I want to make my list class do the job of making the font large, 
I (did) think I have to do something like this. 

public final class myListClass extends List {
    rec_class recs;
    Vector data;
    Font f = Font.getFont(0, 0, Font.SIZE_LARGE);

    public myListClass (String lname)
    {
        super (lname, Choice.IMPLICIT);
        recs = new rec_class(lname);
        myRebuild();
    }

    public void myRebuild () {
        deleteAll();
        data = recs.getrecords();
        int i = 0;

        for (Enumeration e = data.elements(); e.hasMoreElements(); ) {
            append((String)e.nextElement(), null); 
            setFont(i++, f);
        }
   }
}

It compile, but when running, it throws and exception - 
"java.lang.ArrayIndexOutOfBoundsException". I expect the array is the 
lists array of elements. I don't understand why there is a problem, 
because after appending an element, I think it should be possible to use 
to it. 

But I found a solution - 

        for (Enumeration e = data.elements(); e.hasMoreElements(); ) {
            append((String)e.nextElement(), null); 
            //setFont(i++, f);
        }
	for (int i=0;i<size();i++) {
            setFont(i, f);
        }

ehhh, what? I have no idea why, but it works. 


-- 
Thomas Jensen, Denmark

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Thread

J2ME - List and Font Thomas Jensen <lianergoist@sejlgarnet.dk> - 2011-09-20 06:42 +0000
  Re: J2ME - List and Font "John B. Matthews" <nospam@nospam.invalid> - 2011-09-20 14:01 -0400
  Re: J2ME - List and Font Roedy Green <see_website@mindprod.com.invalid> - 2011-09-20 15:13 -0700
  Re: J2ME - List and Font Roedy Green <see_website@mindprod.com.invalid> - 2011-09-20 15:18 -0700
    Re: J2ME - List and Font Thomas Jensen <lianergoist@sejlgarnet.dk> - 2011-09-22 08:36 +0000
      Re: J2ME - List and Font Thomas Jensen <lianergoist@sejlgarnet.dk> - 2011-09-22 10:36 +0000
      Re: J2ME - List and Font Roedy Green <see_website@mindprod.com.invalid> - 2011-09-22 12:15 -0700
      Re: J2ME - List and Font Roedy Green <see_website@mindprod.com.invalid> - 2011-09-22 12:17 -0700

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