Introduction

A displayio based CheckBox widget. It includes a text label and a box that can be checked or unchecked.

Dependencies

This driver depends on:

• Adafruit CircuitPython

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle or individual libraries can be installed using circup.

Works with any displayio compatible display.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install adafruit-circuitpython-checkbox

To install system-wide (this may be required in some cases):

sudo pip3 install adafruit-circuitpython-checkbox

To install in a virtual environment in your current project:

mkdir project-name && cd project-name
python3 -m venv .venv
source .env/bin/activate
pip3 install adafruit-circuitpython-checkbox

Installing to a Connected CircuitPython Device with Circup

Make sure that you have circup installed in your Python environment. Install it with the following command if necessary:

pip3 install circup

With circup installed and your CircuitPython device connected use the following command to install:

circup install adafruit_checkbox

Or the following command to update an existing version:

circup update

Usage Example

import terminalio
from displayio import Group
import supervisor
import time

from adafruit_display_text.bitmap_label import Label
from adafruit_checkbox import CheckBox
from adafruit_usb_host_mouse import find_and_init_boot_mouse

display = supervisor.runtime.display

# group to hold visual elements
main_group = Group()

# make the group visible on the display
display.root_group = main_group

# set up USB host mouse
mouse = find_and_init_boot_mouse()
if mouse is None:
    raise RuntimeError("No mouse found connected to USB Host")

# timestamp of last increment
last_count_time = 0
# counter variable
i = 0

# initialize and show a CheckBox
keep_counting_checkbox = CheckBox(terminalio.FONT, text="Keep Counting", checked=True)
keep_counting_checkbox.anchor_point = (0, 0)
keep_counting_checkbox.anchored_position = (2, 2)
main_group.append(keep_counting_checkbox)

# label to hold the current count
count_label = Label(terminalio.FONT, text=str(i), color=0xFFFFFF)
count_label.anchor_point = (0, 0)
count_label.anchored_position = (2, 20)
main_group.append(count_label)

# add the mouse cursor to the main group
main_group.append(mouse.tilegrid)
while True:
    # update mouse
    pressed_btns = mouse.update()

    # if the checkbox was left clicked
    if pressed_btns is not None and "left" in pressed_btns:
        if keep_counting_checkbox.contains((mouse.x, mouse.y)):
            # toggle the checked state
            keep_counting_checkbox.checked = not keep_counting_checkbox.checked

    if keep_counting_checkbox.checked:
        # increment the counter ever 0.5 seconds and update the label
        if time.monotonic() > last_count_time + 0.5:
            last_count_time = time.monotonic()
            i += 1
            count_label.text = str(i)

Documentation

API documentation for this library can be found on Read the Docs.

For information on building library documentation, please check out this guide.

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.