Showing an icon on a list view

Classic Servoy
1

Hi,

I don’t know how to achieve the following effect. I’m showing with a form in the “List view”. On that form there is an icon that should be shown if a field [on that form] is 0 and hidden if the field is 1.

At first I tried to do set “elements.readButton.visible=false;” but then the icon is gone in all records. I’ve tried to play with calculation but I couldn’t figure out how to do it. Right now I’m in a point where the icon is always visible or always invisible.

Could you help me?

2

Hi James,

You need to use a calculation

if ( myField == someValue )
{
  return "media:///icon1.gif";
} else {
  return "media:///icon2.gif";
}

Make sure the calc is of type MEDIA and check if you use the correct media names (including extension).

Hope this helps.

3

I’m trying but it doesn’t seem to work.

I’ve put the calculation in the dataProvider property of the label/Button. That is what I am supposed to do , right?

if (read===0) {
	return "media:///cancel.png"; 
}
else {
	return "media:///empty.png"; 
}
4

You need to place a field on the form that has the calculation as the dataprovider. Make sure that the DisplayType of this field is set to IMAGE_MEDIA.

5

Like Paul said you need to use a field with display type set to IMAGE_MEDIA.
If you want to use a label or a button then you need to change the calculation to the following code:

if (read==0) { 
   return "<html><img src=media:///cancel.png></html>"; 
} 
else { 
   return "<html><img src=media:///empty.png></html>"; 
}

Of course the calc type should be TEXT.

Hope this helps.

6

Thanks for your help.

I ended up doing:

if (read==0) {
   return "<html><img src=media:///cancel.png></html>";
}
else {
   return "<html></html>";
}

The action on the label is not totally removed but that’s ok.