pdwidgets

Pure-Python, portable widget toolkit for PyDevices

pdwidgets provides a complete, 100% pure-Python GUI toolkit for building touchscreen and desktop interfaces without requiring native C bindings or complex build toolchains. It runs seamlessly on MicroPython, CircuitPython, CPython desktop, and PyScript (Web).

Choosing Your GUI Layer in PyDevices

PyDevices supports multiple graphical approaches depending on your project needs:

• Raw Graphics / Canvas: displaydev & pygraphics for direct pixel, line, and shape drawing.
• Pure-Python GUI: pdwidgets for portable, python-native buttons, lists, themes, and screen management.
• C-Native GUI: lvgl for complex vector widgets and C-accelerated animation engines.

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Quick Start: Interactive Button & Screen

import board_config
import eventsys
import pdwidgets as pd
from pdwidgets.icons import touch_app  # Pure-Python icon bytecode

# 1. Initialize display and event runtime
runtime = eventsys.Runtime.from_board_config(board_config)
display = pd.Display(board_config.display_drv, runtime)
screen = pd.Screen(display)

_taps = 0

# 2. Add an interactive button with a click handler
btn = pd.Button(
    screen,
    x=40,
    y=60,
    w=160,
    h=50,
    label="Tap me (0)",
    icon=touch_app,
)

def on_button_click(event):
    global _taps
    _taps += 1
    btn.set_label(f"Tap me ({_taps})")
    display.refresh()

btn.on_click(on_button_click)

# 3. Draw initial screen and start event loop
display.show(screen)
runtime.run_forever()

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Key Features

• 100% Pure Python & Portable: Zero native C extensions or compilation steps required.
• Zero-File Icon System (pdwidgets.icons): Material Design icons packaged directly as importable Python bytecode modules (bytearray bitmaps)—no SD card assets, binary file I/O, or asset path management needed.
• MCU Memory-Friendly (Lean Imports): Import individual widgets to minimize RAM footprint on microcontrollers:

  from pdwidgets.widgets.button import Button
  from pdwidgets.widgets.screen import Screen

• Integrated Theming: Customizable color schemes, border radii, and visual states using palettes.

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Installation

CPython Desktop (TestPyPI)

pip install \
  -i https://test.pypi.org/simple/ \
  --extra-index-url https://pypi.org/simple/ \
  pydevices-pdwidgets pydevices-displaydev pydevices-pygraphics \
  pydevices-eventsys pydevices-multimer pydevices-palettes

MicroPython (MIP)

import mip
mip.install("pdwidgets", index="https://PyDevices.github.io/mip")

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Links & Demos

• Documentation
• Source Code
• PyScript Live Demos
• Related: pydevices, palettes, pydevices-examples

License

MIT — see LICENSE.

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Icon assets (maintainers)

Runtime icons are importable Python modules under lib/pdwidgets/icons/ (no binary mip). Authoring:

# 1) Optional: regenerate mono .pbm / color .bmp from Material Design
.venv/bin/python scripts/assets_generate_pdwidgets_icons.py
.venv/bin/python scripts/assets_make_color_icons.py
# 2) Convert binaries → .py modules (BITMAP = bytearray; uses sibling or TestPyPI pygraphics)
.venv/bin/python scripts/assets_icons_to_py.py --delete-binaries
# Optional bulk dump into assets/icons/
.venv/bin/python scripts/assets_convert_md_png_to_pbm.py
# PNG smoke probe (PyDevices display stack + material-design-icons png/)
SDL_VIDEODRIVER=dummy ../pydevices-examples/.venv/bin/python tools/png_test.py