Isotropix Forums

Hi,

I was wondering if it'd be possible to create a custom attribute on an object as a dropdown list to let the user select a string item which could then be used to drive a value in an expression for instance?

Thanks,
Jeremy

Hi,

You can create a dropdown attribute like this:

python code

config = ix.create_object("config", "ProjectItem")
attr = config.add_attribute("some_enum", ix.api.OfAttr.TYPE_STRING)
attr.add_preset("label A", "0")
attr.add_preset("label B", "1")
attr.set_string("0")

Hi,

Ok good to know that this is possible, tried it and does work fine, so thanks for the info.

That being said, is this possible only in scripting cause I could not find a way to do it manually through the create custom attribute editor while investigating before to try in scripting?

Thanks,
Jeremy

Hi Jeremy,

Currently, the Create Custom Attribute editor doesn't allow creating custom attributes with presets.
But you could create a shelf tool that runs a script with a UI to create such an attribute.
Here is a basic UI example:

python code

class EventRewire(ix.api.EventObject):

    window = None
    target_item = None
    attr_name = ''
    presets = ''

    def attr_name_changed(self, sender, evtid):
        self.attr_name = sender.get_text()

    def presets_changed(self, sender, evtid):
        self.presets = sender.get_text()

    def create(self, sender, evtid):
        if not self.target_item:
            ix.log_warning('No item selected.')
        else:
            if ix.api.CoreString(self.attr_name).is_identifier() == False:
                ix.log_warning('Attribute name "{}" is invalid.'.format(self.attr_name))
            else:
                # create the attribute
                attr = self.target_item.add_attribute(self.attr_name, ix.api.OfAttr.TYPE_STRING)
                if not attr:
                    ix.log_warning('Failed to create attribute "{}" in item "{}"'.format(attr_name, self.target_item))
                else:
                    # create the presets
                    assert len(self.presets) > 0
                    first_value = None
                    for preset in self.presets.split(';'):
                        parts = preset.split('|')
                        if len(parts) != 2:
                            ix.log_warning('Invalid preset "{}".'.format(preset))
                        else:
                            label = parts[0]
                            value = parts[1]
                            attr.add_preset(label, value)

                            if first_value == None:
                                first_value = value

                    attr.set_string(first_value)

                    window.hide()


if ix.selection.get_count() != 1:
    ix.log_warning("Please select one object.")
else:
    target_item = ix.selection[0]

    h = 22
    w = 400
    pad = 2

    clarisse_win = ix.application.get_event_window()
    window = ix.api.GuiWindow(clarisse_win, clarisse_win.get_x() + clarisse_win.get_width() / 2, clarisse_win.get_y() + clarisse_win.get_height() / 2, w, 100)
    window.set_title('Create Attribute With Presets')

    panel = ix.api.GuiPanel(window, 0, 0, window.get_width(), window.get_height())
    panel.set_constraints(ix.api.GuiWidget.CONSTRAINT_LEFT, ix.api.GuiWidget.CONSTRAINT_TOP,
                          ix.api.GuiWidget.CONSTRAINT_RIGHT, ix.api.GuiWidget.CONSTRAINT_BOTTOM)

    y = 0
    item_name_label = ix.api.GuiLineEdit(panel, pad, y, w - pad, h, "Target item:")
    item_name_label.set_read_only(True)
    item_name_label.set_text(target_item.get_full_name())
    y += h + pad

    attr_name_edit = ix.api.GuiLineEdit(panel, pad, y, w - pad, h, "New Attribute:")
    y += h + pad

    presets_edit = ix.api.GuiLineEdit(panel, pad, y, w - pad, h, "Presets:")
    # expected syntax: "label1|value1;label2|value2|..."
    y += h + pad

    create_btn = ix.api.GuiPushButton(panel, pad, y, w - pad, h, "Create")

    event_rewire = EventRewire()
    event_rewire.window = window
    event_rewire.target_item = target_item

    # connect events: connect(item_to_listen, what_we_are_listening, function_called)
    event_rewire.connect(attr_name_edit, 'EVT_ID_LINE_EDIT_VALUE_EDITED', event_rewire.attr_name_changed)
    event_rewire.connect(presets_edit, 'EVT_ID_LINE_EDIT_VALUE_EDITED', event_rewire.presets_changed)
    event_rewire.connect(create_btn, 'EVT_ID_PUSH_BUTTON_CLICK', event_rewire.create)

    window.show()
    while window.is_shown():
        ix.application.check_for_events()

    window.destroy()

Ok thanks for the info Anthony, I'll take a look at this.