On the size of the button, change the labelfield

I was wondering if I could create. I guess I have to put this in my custom button fields.

In any case, I want to have a labelfield wide screen at the top of the screen that changes its text each time that a change of focus button. As if I had 3 buttons, 1 button would have the labelfield say 'Hello' or something, button 2 'Hi' etc... I don't want the actual clicks to make a completely different use that is already in place. Is this possible?

Thank you

You have not even create custom fields - those regular will do just fine.

What you need, however, is a FocusChangeListener. I would put on the Manager with all the buttons. FOCUS_GAINED and FOCUS_CHANGED, analyze the Manager getLeafFieldWithFocus() and, if it's one of your buttons, change the text on the LabelField using setText. On FOCUS_LOST, restore the LabelField of the original text.

One of the 'cool' possibilities: have a look at the Field.setCookie and Field.getCookie methods. If you setCookie on all your buttons (with the text that you want to appear in the LabelField when this button gets focus), you can then getCookie just on the sheet with a focus on the ground and, if it is not null, use the value (you don't even have to cast to a String, but check beforehand to avoid exceptions) for on the LabelField setText.

To summarize, you must:

(1) FocusChangeListener with focusChanged properly defined;

(2) setFocusListener on your Manager with the buttons;

(3) on your LabelField setText.

(4) potentially setCookie on your buttons and inside focusChanged getCookie.

I hope it's clear enough for you to implement. Enjoy!

Tags: BlackBerry Developers

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