element control in list mode

Classic Servoy
1

I want a button enabled when there is a value in the database. I can do that for a form in record view.

if(value)
elements.test.enabled = true;
else
elements.test.enabled = false;

When the form is in list mode, than the button must be enabled or disabled for each record.
How can I achieve that?

2

Hi Leendert,

Short answer: you can’t.
What you could do however is use a calculation that shows a (button) image depending on the status.
And an onAction method on that calculation field that checks the record status and acts accordingly.

Hope this helps.

3

What you could do however is use a calculation that shows a (button) image depending on the status

How can I do that? Form access in a calculation isn’t possible.

4

Hi Leendert,

Like I said you can’t set a property of a button in a specific row. What you can do however is mimicking this behavior by using a calculation that shows an image depending on your status field (of that same record).
So you are not setting any form properties but you are showing an image (of a button) like so:

if (value) {
   return 'media:///button_enabled.png';
} else { 
   return 'media:///button_disabled.png';
}

You put this caculation on the list and add a method to the onAction event. This method will look something like this:

if ( value ) {
  // 'button' is enabled, do your thing
}

I know it’s a workaround but it does what you want to do.

5

I can’t get it to work. Do you show an image with the dataprovider that calculation?

6

That is correct. The field will be display type IMAGE_MEDIA.

7

Thanks, it works very nice.