I wasn't sure if you were asking for just a normal dropdown or a dropdown with selection inputs, for the first the code is quite simple and works the way you intend; for the second, you have to use a GroupCommandInput to have a dropdown and you only get a messageBox when the selection is changed rather than when you switch focus between inputs.
Here is the sample code let me know if it helps.
import adsk.core, adsk.fusion, traceback, adsk.cam
#Affectations usuelles
handlers = []
app: adsk.core.Application = adsk.core.Application.get()
ui = app.userInterface
class CommandCreatedHandler(adsk.core.CommandCreatedEventHandler):
def __init__(self):
super().__init__()
def notify(self, args: adsk.core.CommandCreatedEventArgs):
try:
cmd = args.command
inputs = cmd.commandInputs
onExecute = CommandExecuteHandler()
cmd.execute.add(onExecute)
handlers.append(onExecute)
onInputChanged = MyInputChangedHandler()
cmd.inputChanged.add(onInputChanged)
handlers.append(onInputChanged)
dropdown = inputs.addDropDownCommandInput('testDropdown', 'Test', 1)
listItems = dropdown.listItems
for dropdownId in ['dropdown' + str(i) for i in range(4)]:
listItems.add(dropdownId, False)
group = inputs.addGroupCommandInput('TestGroup', 'Group')
group.children.addSelectionInput('select1', 'Select1', 'Select1')
group.children.addSelectionInput('select2', 'Select2', 'Select2')
group.children.addSelectionInput('select3', 'Select3', 'Select3')
group.children.addSelectionInput('select4', 'Select4', 'Select4')
except:
if ui:
ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))
class CommandExecuteHandler(adsk.core.CommandEventHandler):
def __init__(self):
super().__init__()
def notify(self, args: adsk.core.CommandEventArgs):
try:
pass
except:
if ui:
ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))
class MyInputChangedHandler(adsk.core.InputChangedEventHandler):
def __init__(self):
super().__init__()
def notify(self, args):
try:
eventArgs = adsk.core.InputChangedEventArgs.cast(args)
if eventArgs.input.id == 'testDropdown':
ui.messageBox(eventArgs.input.selectedItem.name)
else:
ui.messageBox(eventArgs.input.id)
except:
if ui:
ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))
def run(context):
try:
ui = app.userInterface
cmdDefinitions = ui.commandDefinitions
btnCmdDefinition = cmdDefinitions.itemById('testCommand')
if btnCmdDefinition:
btnCmdDefinition.deleteMe()
btnCmdDefinition: adsk.core.CommandDefinition = cmdDefinitions.addButtonDefinition('testCommand', 'test', 'test')
onCreated = CommandCreatedHandler()
btnCmdDefinition.commandCreated.add(onCreated)
handlers.append(onCreated)
btnCmdDefinition.execute()
except:
if ui:
ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))
def stop(context):
# Il faut nettoyer l'interface si on ferme l'add-in
try:
cmdDef = ui.commandDefinitions.itemById('testCommand')
if cmdDef:
cmdDef.deleteMe()
except:
if ui:
ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))
In general, to see the possibilities of a command dialog, I'll advise you to check the command inputs sample addin here : https://help.autodesk.com/view/fusion360/ENU/?guid=GUID-e5c4dbe8-ee48-11e4-9823-f8b156d7cd97
Fusion
