Dropdown List¶

Use a dropdown list to pick one or more options from a large number of options.

Basic¶

Set mode='multi menu' to show a dropdown menu that allows multiple options to be selected.

mode= can be elided when there are more than 7 options.

choices = view(box(
    'Choose some colors',
    mode='multi menu',
    options=['green', 'yellow', 'orange', 'red']
))
view(f'You chose {choices}.')

Screenshot

Set initial selection¶

Set value= to pre-select options having those values.

choices = view(box(
    'Choose some colors',
    mode='multi menu',
    value=['yellow', 'red'],
    options=['green', 'yellow', 'orange', 'red']
))
view(f'You chose {choices}.')

Screenshot

Mark options as selected¶

Alternatively, set selected=True to pre-select one or more options.

choices = view(box(
    'Choose some colors',
    mode='multi menu',
    options=[
        option('green', 'Green'),
        option('yellow', 'Yellow', selected=True),
        option('orange', 'Orange'),
        option('red', 'Red', selected=True),
    ]
))
view(f'You chose {choices}.')

Screenshot

Handle changes immediately¶

Add live to mode to handle changes immediately.

choices = ['green', 'yellow']
while True:
    choices = view(
        box(
            'Choose some colors',
            mode='live multi menu',
            value=choices,
            options=['green', 'yellow', 'orange', 'red'],
        ),
        f'You chose {choices}.'
    )

Screenshot

Disable¶

Set disabled=True to disable.

view(box(
    'Choose some colors',
    mode='multi menu',
    options=['green', 'yellow', 'orange', 'red'],
    disabled=True
))

Screenshot