Opened 9 years ago

Closed 9 years ago

#1963 closed enhancement (fixed)

Improve list handling callback javascript code

Reported by: Nicklas Nordborg Owned by: Nicklas Nordborg
Priority: minor Milestone: BASE 3.7
Component: web Version:
Keywords: Cc:


While working with #1962 it became apparent that there are lots of very similar methods for handling callbacks after selecting a related item in an edit dialog. For example, after selecting a protocol for a sample:

samples.setProtocolCallback = function(event)
  var frm = document.forms['sample'];
  var list = frm.protocol_id;
  if (list.length < 2 || list[1].value == 'NaN')
    Forms.addListOption(list, 1, new Option());
  list[1].value =;
  list[1].text =;
  list.selectedIndex = 1;

It should not be too difficult to create a generic callback that can replace more or less all existing implementations. Typically the only difference between the various functions are:

  • The name of the form and input field, but we can get this with event.currentTarget.
  • If the option should be inserted at index=1 or index=0. This depends on if there is a 'none' option or not available.
  • In some cases there is an additional call to a 'onclick' or 'onchange' method. It is better to implement this by sending a real 'onchange' event.

Change History (3)

comment:1 by Nicklas Nordborg, 9 years ago

(In [7001]) References #1963: Improve list handling callback javascript code

Added Items.onItemSelected callback handler that can be attached to 'base-selected' event. The handler will insert or update the list it is attached with the item information sent in the event. If the new information is different from the currently selected a 'change' event is firef.

Most old event handlers should now be replaced with the new handler.

comment:2 by Nicklas Nordborg, 9 years ago

Owner: changed from everyone to Nicklas Nordborg
Status: newassigned

comment:3 by Nicklas Nordborg, 9 years ago

Resolution: fixed
Status: assignedclosed
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