feat: ComboBox - @deephaven/jsapi-components

[bmingles]

Jsapi support for ComboBox. Includes some splitting out of existing Picker logic to make code re-usable.

Should be testable with plugins PR deephaven/deephaven-plugins#588
I have also deployed an alpha 0.83.1-alpha-combobox.8 if you need it, although should only matter for types I think.

from deephaven import empty_table, ui, time_table
import datetime


# Change this to test different data types
key_column="Timestamp"


initial_row_count=5 * 8760 # 5 years in hours

# Tick every 6 hours (makes it easier to test Timestamp filters for a whole day like `2024-01-02`)
_items = time_table("PT6H", start_time=datetime.datetime.now() - datetime.timedelta(hours=initial_row_count)).update([
    # Timestamp column also implicitly included in `time_table`
    "Int=new Integer(i)",
    "Long=new Long(i)",
    "BigInt=new java.math.BigInteger(``+i)",
    "String=new String(`a`+i * 1000)",
])


@ui.component
def ui_combo_box(items):
    value, set_value = ui.use_state("")

    combo = ui.combo_box(
        ui.item_table_source(
            items,
            key_column=key_column,
            label_column=key_column,
        ),
        label=key_column,
        on_selection_change=set_value,
        menu_trigger="focus",
        selected_key=value,
    )

    # Show current selection in a ui.text component
    text = ui.text("Selection: " + str(value))

    return combo, text


my_combo_box = ui_combo_box(_items)

There is a known issue with inconsistent open as you type for table data sources.
#2115

resolves #2074

[bmingles]

@mofojed for reference, I think this is where we could apply addition filters as part of @AkshatJawne partition table work

[bmingles]

I guess it might make sense to just add it to this PR, but I'm fine either way

[mofojed]

Only thing that needs updating is the PR description
Show passing in a ui.item_table_data_source instead of passing in props for key_column directly on combo_box.