Qlik Sense Mashups - event for responding to selections

[rbartley]

Hello all,

What is the best way of picking up when a change has been made to a QS filter panel element?  Is it to simply use the $("#FilterPanelID").change() event?  Is there any way of referring to individual elements within a filter panel?

Thanks in advance.

Richard

[ErikWetterberg]

Hi Richard,

Do you really want to listen to selection made just in the filter panel, not through for example the selection toolbar, a chart or with a bookmark? In that case you probably need some reverse engineering och the filter panel.

If you want to listen to all selection made in a specificerat field, you can use the createList method: createList method ‒ Qlik Sense.

Hope this helps

Erik Wetterberg

[rbartley]

Hello Erik,

Thank you for replying.   Unfortunately, the Qlik Help page did not provide any examples of how this would work.  Are you suggesting that if I add a filter panel and also create lists for each of the fields contianed within the filter panel then I can somehow check for an onchange event?  I would be grateful if you could provide a small example.

Richard

[ErikWetterberg]

Hi,

I suggestiv you create a list, pretty much like the code example in the helps, for each field you want to listen to changes for. Every time there is a change in selection that affect this field your callback funktion will be called.

Hope this helps

Erik Wetterberg

[rbartley]

Thanks again Erik.  When talking about the callback function are you referring to the anonymous function that begins on line 12 below?app.createList({

  "qDef": {
  "qFieldDefs": [
  "[Year]"
  ]
  },
  "qInitialDataFetch": [{
  qTop : 0,
  qLeft : 0,
  qHeight : 40,
  qWidth : 1
  }]
  }, function(reply) {
  var str = "";
  $.each(reply.qListObject.qDataPages[0].qMatrix, function(key, value) {
  str += '<li>' + value[0].qText + '</li>';
  });
  $('#list').html(str);
  ;
  });

[ErikWetterberg · Accepted solution]

Yes, that's the one.It will be called whenever the field changes with the current selection state.

Hope this helps

Erik Wetterberg

[rbartley]

Yes, that seems to work.  I assume that i can determine which items are selected by looking at selections from qSelectionInfo, right?

[ErikWetterberg]

Not really, I'm afraid. You should look at qState in the cells, documented as NxCell here:ListObject ‒ Qlik Sense. There is also a count of # of values in the different state in qDimensionInfo: NxDimensionInfo ‒ Qlik Sense

Hope this helps

Erik Wetterberg

[rbartley]

Yes, I'd spotted that while looking at qMatrix, but thought that there might be a shortcut to having to loop through all of the values.  Oh well, never mind.  Thank you very much for your help.