[mbag]

Hi,

Is it possible to change whether a Field can receive the focus once it has been added to the screen?

The only place I can seem to set this is when setting the style on initial creation of the object.

Thanks.

[arunk]

I think the only option is while defining the label...

I mean creating the new object.

[mbag]

Thanks for your reply.

If anyone's interested:

The solution I've devised is to create a new Field object (and setting the style) each time I need to toggle a Field between focusable/non-focusable and use the Screen's replace() method to insert the new Field in the old Field's place. I get a reference to the old Field using Screen's getField() method.

[shraddha294]

mbag,
I wonder where would one encounter a scenario when you need a field to be focusable at one time and non-focusable at other time... after it is attached to form..

[lanfong]

It seems like I'm not the only one that encountered such problem. The solution I finally came up was overriding "isFocusable" method

Here's the note from the API Documentation

Handling focus issues
If you want your field to receive the focus, then you must override isFocusable to return true.

If you don't want your field to be focusable, you just return false.



Some people might want to make the field looks like "disabled" like what we usually do in C#, disabling textbox, label, etc so it's gray color.


What I did is overriding the paint method to make like the below code

protected void paint(Graphics graphics) {
if (!this._isFocusable)
graphics.setGlobalAlpha(50);
}

make it looks like it's disabled.....

[simon.hain]

you can exchange fields at runtime, just put another one in its place.

[lanfong]

Originally Posted by simon.hain

you can exchange fields at runtime, just put another one in its place.

putting another one in its place. Did you mean that I created a brand new field and replace with the old one????

is it more efficient than overriding paint and isFocusable mthod??

If so, I will just create a new one then