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Merged
merged 13 commits into from
Feb 18, 2020
Merged

Adding background_color #35

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2086944
Merge pull request #1 from adafruit/master
FoamyGuy Feb 15, 2020
cefd454
adding background_color and usage example
FoamyGuy Feb 15, 2020
39431ec
undo ide formatting changes
FoamyGuy Feb 15, 2020
eae4cb4
adding getter setter properties for background_color
FoamyGuy Feb 15, 2020
7868b40
fix typo
FoamyGuy Feb 15, 2020
fb70ae4
fix typo in background_color example
FoamyGuy Feb 15, 2020
5dfc291
fix setting background back to transparent. add logic to track transp…
FoamyGuy Feb 18, 2020
80ebaa9
remove unneeded else block
FoamyGuy Feb 18, 2020
46b04fe
fix for setting background to visible black
FoamyGuy Feb 18, 2020
870643a
add leading underscore to _transparent_background
FoamyGuy Feb 18, 2020
0fe25b5
fix constructor for visible black background color
FoamyGuy Feb 18, 2020
4d65e55
fix constructor for visible black background color
FoamyGuy Feb 18, 2020
72c5b62
fix constructor for visible black background color
FoamyGuy Feb 18, 2020
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29 changes: 27 additions & 2 deletions adafruit_display_text/label.py
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,7 @@ class Label(displayio.Group):
:param int color: Color of all text in RGB hex
:param double line_spacing: Line spacing of text to display"""
def __init__(self, font, *, x=0, y=0, text=None, max_glyphs=None, color=0xffffff,
line_spacing=1.25, **kwargs):
background_color=None, line_spacing=1.25, **kwargs):
if not max_glyphs and not text:
raise RuntimeError("Please provide a max size, or initial text")
if not max_glyphs:
Expand All @@ -71,7 +71,14 @@ def __init__(self, font, *, x=0, y=0, text=None, max_glyphs=None, color=0xffffff
self.y = y

self.palette = displayio.Palette(2)
self.palette.make_transparent(0)
if background_color is not None:
self.palette[0] = background_color
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Sorry, I totally forgot about needing to accept 0 as a possible valid color. If that were done with above, then it would be treated as setting transparent. How about this?

        if background_color is not None:
            self.palette[0] = background_color
            self.palette.make_opaque(0)
            self.transparent_background = False
        else:
            self.palette.make_transparent(0)
            self.transparent_background = True

Or could maybe do like you did in the setter?

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(but also with the leading underscore)

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Ah right, thank you. just pushed some commits to fix this in the constructor.

self.palette.make_opaque(0)
self._transparent_background = False
else:
self.palette[0] = 0
self.palette.make_transparent(0)
self._transparent_background = True
self.palette[1] = color

bounds = self.font.get_bounding_box()
Expand Down Expand Up @@ -168,6 +175,24 @@ def color(self):
def color(self, new_color):
self.palette[1] = new_color

@property
def background_color(self):
"""Color of the background as an RGB hex number."""
if not self._transparent_background:
return self.palette[0]
return None

@background_color.setter
def background_color(self, new_color):
if new_color is not None:
self.palette[0] = new_color
self.palette.make_opaque(0)
self._transparent_background = False
else:
self.palette[0] = 0
self.palette.make_transparent(0)
self._transparent_background = True

@property
def text(self):
"""Text to display."""
Expand Down
25 changes: 25 additions & 0 deletions examples/display_text_background_color.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,25 @@
"""
This examples shows the use color and background_color
"""
import time
import board
import terminalio
from adafruit_display_text import label

text = " Color Background Hello world"
text_area = label.Label(terminalio.FONT, text=text, color=0x0000FF, background_color=0xFFAA00)
text_area.x = 10
text_area.y = 10

print("background color is {:06x}".format(text_area.background_color))

board.DISPLAY.show(text_area)
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Also add some lines that show:

  • querying current background color
  • changing back to no background color


time.sleep(2)
text_area.background_color = 0xFF0000
print("background color is {:06x}".format(text_area.background_color))
time.sleep(2)
text_area.background_color = None
print("background color is {}".format(text_area.background_color))
while True:
pass