Styles formatting

[jposada202020]

Features

The change will add the feature to use label with styles. With this feature you could possible create the same style among differents widgets. The syles are taken from the PySimpleGui Project

Changes

There are changes in the following files:
init: A new function is added. This function converts the color str representation used in colorset used in the source library
label.py: a New class LabelT is added. This class is a child of label, This could use the theme as a parameter.
styles.py: New file including the colorsets. the idea to create a new file will be to share among different widgets. This could be easily done adding entries to the dictionary.
display_text_label_styles.py: new example

Tests

Expected result of the example is:

Others

See adafruit/Adafruit_CircuitPython_Colorsys#13 for project updates

TEST CODE

# SPDX-FileCopyrightText: 2021 Jose David Montoya
# SPDX-License-Identifier: MIT

import terminalio
import displayio
from os import uname
import time

if uname()[0] == 'samd51':
    import board
else:
    from blinka_displayio_pygamedisplay import PyGameDisplay
from adafruit_display_text import label
from adafruit_bitmap_font import bitmap_font

if uname()[0] == 'samd51':
    display = board.DISPLAY
else:
    display = PyGameDisplay(width=320, height=240)
splash = displayio.Group(max_size=10)
MEDIUM_FONT = bitmap_font.load_font("fonts/Helvetica-Bold-16.bdf")

text = "CircuitPython"
text_area = label.Label(MEDIUM_FONT,
                        text=text,
                        label_direction="LTR",
                        background_tight=True,
                        x=155,
                        y=110,
                        padding_left=10,
                        padding_top=10,
                        padding_bottom=10,
                        padding_right=10,)

splash.append(text_area)
display.show(splash)
time.sleep(1)

text_area.label_direction = "UPR"
text_area.label_style = "DarkRed2"
display.show(splash)
time.sleep(1)
text_area.label_direction = "RTL"
text_area.label_style = "DarkGreen5"
display.show(splash)
time.sleep(1)
text_area.label_direction = "DWR"
text_area.label_style = "LightGreen8"
display.show(splash)
time.sleep(1)
text_area.label_direction = "TTB"
display.show(splash)
time.sleep(1)
text = "CircuitPython"

while True:
    pass

[jposada202020]

See this issue for updates adafruit/Adafruit_CircuitPython_Colorsys#13 and possible changes.

[jposada202020]

Replace by PR #143 .

Thanks,