addEventListener - change

[Chuck Uebele]

I'm trying to learn how the event handlers work.  I set up a simple dialog to use MouseEvents.  I got the "click" event to work but when I try to set an event for "change" nothing happens.  Basiclly with the UI, if you change the selection in the dropdownlist, an alert should pop up sayiing "p2".  This was run on Photoshop CS5.  Is this a bug, or I'm I doing something wrong? Here's the code:

var drop1 = ['one','two','three']

var d

createDlg ()

function createDlg(){

      d = new Window('dialog','test')

            d.p1 = d.add('panel',undefined,'panel 1')

                  d.p1.cbx1 = d.p1.add('checkbox',undefined,'checkbox 1');

                  d.p1.rb1 = d.p1.add('radiobutton',undefined,'radio button 1')

                  d.p1.rb2 = d.p1.add('radiobutton',undefined,'radio button 2')

                  d.p1.etx1 = d.p1.add('edittext',undefined,'edit text one')

                  d.p1.rb1.value = true

            d.p2 = d.add('panel',undefined,'panel 2')

                  d.p2.cbx2 = d.p2.add('checkbox',undefined,'checkbox 2');

                  d.p2.dp1 = d.p2.add('dropdownlist',undefined,drop1);

                  d.p2.dp1.selection = 0

            d.addBtn = d.add('button',undefined,'add')

            d.removeBtn = d.add('button',undefined,'remove')

            d.closeBtn = d.add('button',undefined,'close')

            d.addBtn.onClick = function(){intD(d)}

            d.removeBtn.onClick = function(){removeD(d)}

            d.closeBtn.onClick = function(){d.close()}

      d.show()

      }

function intD(w){

      ScriptUI.events.createEvent('MouseEvent');

      w.p1.addEventListener ('click', p1handler, false);

      w.p2.addEventListener ('click', p2handler, false);

      w.p2.dp1.addEventListener ('change', p2handler, true);

      }

function removeD(w){

      w.p1.removeEventListener ('click', p1handler, false);

      w.p2.removeEventListener ('click', p2handler, false);

      w.p2.dp1.removeEventListener ('change', p2handler, false);     

      }

function p1handler(){

      if(d.p1.rb1.value){d.p1.etx1.text = 'true'}

      else{d.p1.etx1.text = 'false'}

      }

function p2handler(){alert('p2')}

[Michael_L_Hale]

I have found that mouse events don't work correctly for me with Photoshop CS5. The same dialog that fails there works as expected in other Adobe apps that support ScriptUI.

[Chuck Uebele]

Thanks, Mike.  I'll have to try this on CS6 and see what happens, but we haven't upgraded at work yet to CS6, and I might need this backward compatable for a bit.

[John Smith Images]

And do Adobe have a fix for that???

I mean if the eventlisteners work on the controls why not lauch it from a dialog box at PS start? Is it possible?

[fidelm02]

the issue persist on Photoshop 25.3.1 (2024)

theDropdownlist has a "selection" property, which give the item selected.

if you change it by code:

dropdown_instance.selection = 0;

then the onChange callback is activated. 

But when a user click on the dropdownlist is not changing the "selection" property and by consecuente, the callback is not triggered. 

it seems something is broken when the UI change the "selection" property.

I hope this help to solve this bugs in the future.