Selection Event only returning the first item selected

[Joshua.mursic]

I am confused on how to use the selection Event, it is only returning the first item that is selected when I select multiple items. When I select component1:1 it correctly logs that, but when I select the next component, it logs the first item again.

import adsk.core,adsk.fusion,adsk.cam
from .lib import fusion360utils as futil
app = adsk.core.Application.get()
ui = app.userInterface
selections = []

def command_created(args: adsk.core.CommandCreatedEventArgs):
    '''Function that is called when a user clicks the corresponding button in the UI. This defines the contents of the command dialog and connects to the command related events.'''
    cmd = args.command
    inputs = cmd.commandInputs
    # Add All Handlers
    futil.add_handler(cmd.execute, command_execute)
    futil.add_handler(cmd.destroy, command_destroy)
    futil.add_handler(cmd.select, command_select)
    futil.add_handler(cmd.unselect, command_unSelect)
    
    cmdSelections = inputs.addSelectionInput("itemSelector","Selections","")
    cmdSelections.addSelectionFilter(adsk.core.SelectionCommandInput.Occurrences)
    cmdSelections.setSelectionLimits(1,0)


def command_select(args:adsk.core.SelectionEventArgs):
    selection:adsk.fusion.Occurrence = args.selection.entity
    app.log(f"selecting: {selection.name}")
    if selection:
        if selection.name not in selections:
            selections.append(selection.name)


def command_unSelect(args:adsk.core.SelectionEventArgs):
    selection:adsk.fusion.Occurrence = args.selection.entity
    app.log(f"unselecting: {selection.name}")
    if selection:
        if selection.name in selections:
            selections.remove(selection.name)


def command_execute(args:adsk.core.CommandEventArgs):
    app.log(f'{selections}')


def command_destroy(args: adsk.core.CommandEventArgs):
    app.log("DESTORY")
    pass

[kandennti]

Hi @Joshua.mursic .

I tried it. I can reproduce it.
I don't know if this is a bug or a specification, but how about changing the command_select function as follows?

def command_select(args: adsk.core.SelectionEventArgs):
    selIpt: adsk.core.SelectionCommandInput = args.activeInput
    if selIpt.selectionCount > len(selections):
        selection: adsk.fusion.Occurrence = selIpt.selection(
            selIpt.selectionCount - 1).entity
        app.log(f"selecting: {selection.name}")

        if selection:
            if selection.name not in selections:
                selections.append(selection.name)

[BrianEkins · Accepted solution]

I've been told this is a bug and will be fixed in a hotfix. There is a workaround in the near term. Instead of using the selection property of the SelectionEventArgs to get the last thing selected you can instead use the selection property of the SelectionInput and get the last item in the collection. The workaround will continue to work even after the problem is fixed, but I would expect the fix sometime within the next couple of weeks.

selArgs: adsk.core.SelectionEventArgs = args
activeInput: adsk.core.SelectionCommandInput = selArgs.activeInput
selection = activeInput.selection(activeInput.selectionCount-1)