How to dynamically add items into python addin Combobox from another addin combobox.

Question

I have two combo boxes. I am trying to add items dynamically into the second combobox from the first combobox's "onSelChange(self, selection)" event. due to some reason this is not working. here is my sample code: import arcpy import pythonaddins class ComboBoxClass1(object): def __init__(self): self.items = [] self.editable = True self.enabled = True self.dropdownWidth = 'WWWWWW' self.width = 'WWWWWW' def onSelChange(self, selection): pass def onEditChange(self, text): pass def onFocus(self, focused): self.refresh() pass def onEnter(self): pass def refresh(self): self.refresh() pass class ComboBoxClass2(object): def __init__(self): self.items = ["Location1","Location2","Location3"] self.editable = True self.enabled = True self.dropdownWidth = 'WWWWWWW' self.width = 'WWWWWWW' self.cb1= ComboBoxClass1() def onSelChange(self, selection): self.cb1.items.append(selection) self.cb1.refresh() def onEditChange(self, text): pass def onFocus(self, focused): # When the combo box has focus, update the combo box with the list of layer names. pass def onEnter(self): pass def refresh(self): self.refresh() pass‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

FreddieGibson · Accepted Answer

Hi Surendran Neelakantan‌, As per our phone conversation earlier, we implemented the following to resolve this issue. import arcpy import pythonaddins class cbxClass1(object): """Implementation for ComboBoxExample_addin.cbx1 (ComboBox)""" def __init__(self): self.items = [chr(n) * 3 for n in range(65, 65+3)] # [AAA, BBB, CCC] self.editable = True self.enabled = True self.dropdownWidth = 'WWWWWW' self.width = 'WWWWWW' cbxClass1._hook = self def onSelChange(self, selection): cbxClass2._hook.items.extend([selection]) class cbxClass2(object): """Implementation for ComboBoxExample_addin.cbx2 (ComboBox)""" def __init__(self): self.items = [chr(n) * 4 for n in range(90, 90 - 3, -1)] # [ZZZ, xyz, YYY] self.editable = True self.enabled = True self.dropdownWidth = 'WWWWWW' self.width = 'WWWWWW' cbxClass2._hook = self def onSelChange(self, selection): cbxClass1._hook.items.extend([selection])‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ As I stated on our call, there will be more than way to accomplish this. I will ensure that this approach is documentation on a public facing knowledge article. I will also pass this information along to the necessary parties to determine how we can better explain this workflow within our documentation. Please let me know if you have any problems with this. Freddie G.