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Margaret Matocha
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Add more complex example with alternating display of label and bitmap_label
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‎examples/display_text_label_vs_bitmap_label_alternating.py

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# Sample code using the textMap library and the "textBox" wrapper class
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# Creates four textBox instances
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# Inserts each textBox into a tileGrid group
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# Writes text into the box one character at a time
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# Moves the position of the textBox around the display
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# Clears each textBox after the full string is written (even if the text is outside of the box)
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#import textmap
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#from textmap import textBox
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import board
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import displayio
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import terminalio
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import fontio
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import sys
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import time
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import busio
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from adafruit_display_text import bitmap_label
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#from adafruit_display_text import bitmap_label as Label
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from adafruit_display_text import label
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# Setup the SPI display
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##########
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# Use this Boolean variables to select which font style to use
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##########
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use_builtin_font=True # Set True to use the terminalio.FONT BuiltinFont,
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# Set False to use a BDF loaded font, see "fontFiles" below
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##########
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# Set scaling factor for display text
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my_scale=1
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# Setup the SPI display
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if "DISPLAY" not in dir(board):
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# Setup the LCD display with driver
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# You may need to change this to match the display driver for the chipset
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# used on your display
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from adafruit_ili9341 import ILI9341
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displayio.release_displays()
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# setup the SPI bus
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spi = board.SPI()
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tft_cs = board.D9 # arbitrary, pin not used
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tft_dc = board.D10
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tft_backlight = board.D12
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tft_reset = board.D11
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while not spi.try_lock():
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spi.configure(baudrate=32000000)
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spi.unlock()
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display_bus = displayio.FourWire(
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spi,
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command=tft_dc,
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chip_select=tft_cs,
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reset=tft_reset,
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baudrate=32000000,
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polarity=1,
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phase=1,
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)
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# Number of pixels in the display
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DISPLAY_WIDTH = 320
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DISPLAY_HEIGHT = 240
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# create the display
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display = ILI9341(
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display_bus,
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width=DISPLAY_WIDTH,
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height=DISPLAY_HEIGHT,
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rotation=180, # The rotation can be adjusted to match your configuration.
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auto_refresh=True,
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native_frames_per_second=90,
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)
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# reset the display to show nothing.
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display.show(None)
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else:
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# built-in display
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display = board.DISPLAY
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print ('Display is started')
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# load all the fonts
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print('loading fonts...')
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fontList = []
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# Load some proportional fonts
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fontFiles = [
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'fonts/Helvetica-Bold-16.bdf',
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# 'fonts/BitstreamVeraSans-Roman-24.bdf', # Header2
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# 'fonts/BitstreamVeraSans-Roman-16.bdf', # mainText
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]
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from adafruit_bitmap_font import bitmap_font
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for i, fontFile in enumerate(fontFiles):
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if use_builtin_font:
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thisFont=terminalio.FONT # comment this out to switch back to BDF loaded fonts
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else:
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thisFont = bitmap_font.load_font(fontFile)
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fontList.append(thisFont)
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preloadTheGlyphs= True # set this to True if you want to preload the font glyphs into memory
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# preloading the glyphs will help speed up the rendering of text but will use more RAM
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if preloadTheGlyphs:
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# identify the glyphs to load into memory -> increases rendering speed
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glyphs = b'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-,.:?! '
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print('loading glyphs...')
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for font in fontList:
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if font is not terminalio.FONT:
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font.load_glyphs(glyphs)
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print('Glyphs are loaded.')
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print('Fonts completed loading.')
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# create group
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import gc
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myString1=('This is a label.py and\nbitmap_label.py comparison.')
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myString23='none'
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myString_bitmap_label='bitmap_label'
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myString_label='label bitmap_label'
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#####
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# Create the "bitmap_label.py" versions of the text labels.
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gc.collect()
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bitmap_label_start=gc.mem_free()
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bmap_label1 = bitmap_label.Label(font=fontList[0], text=myString1, color=0xFFFFFF, max_glyphs=len(myString1),
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background_color=0xFF0000,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=True,
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x=10,
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y=60,
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line_spacing=1.25,
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scale=my_scale,
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anchor_point=(0.5,0),
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anchored_position=(160, 50),
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)
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label2_padding=10
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bmap_label2 = bitmap_label.Label(font=fontList[0], text=myString23, color=0x000000, max_glyphs=len(myString23),
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background_color=0xFFFF00,
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padding_bottom=label2_padding,
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padding_left=0,
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padding_right=0,
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padding_top=label2_padding,
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background_tight=False,
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x=10,
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y=100,
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line_spacing=1.25,
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scale=my_scale,
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anchor_point=(0,0),
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anchored_position=(200,150),
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)
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bmap_label3 = bitmap_label.Label(font=fontList[0], text=myString23, color=0x000000, max_glyphs=len(myString23),
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background_color=0xFFFF00,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=True,
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x=10,
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y=150,
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line_spacing=1.25,
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scale=my_scale,
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)
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bmap_label4 = bitmap_label.Label(font=fontList[0], text=myString_label, color=0x000000, max_glyphs=len(myString_label),
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background_color=0xFFFF00,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=False,
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x=10,
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y=200,
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line_spacing=1.25,
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scale=my_scale,
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)
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myString5='bitmap_label -->'
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bmap_label5 = bitmap_label.Label(font=fontList[0], text=myString5, color=0xFFFFFF, max_glyphs=len(myString5),
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background_color=0x000000,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=True,
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x=10,
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y=200,
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line_spacing=1.25,
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anchor_point=(1,0.5),
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anchored_position=(200,200),
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scale=my_scale,
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)
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gc.collect()
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bitmap_label_end=gc.mem_free()
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bmap_group = displayio.Group( max_size=5 ) # Create a group for displaying
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bmap_group.append(bmap_label1)
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bmap_group.append(bmap_label2)
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bmap_group.append(bmap_label3)
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bmap_group.append(bmap_label4)
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bmap_group.append(bmap_label5)
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#####
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# Create the "label.py" versions of the text labels.
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gc.collect()
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label_start=gc.mem_free()
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label1 = label.Label(font=fontList[0], text=myString1, color=0xFFFFFF, max_glyphs=len(myString1),
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background_color=0xFF0000,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=True,
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x=10,
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y=60,
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line_spacing=1.25,
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scale=my_scale,
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anchor_point=(0.5,0),
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anchored_position=(160, 50),
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)
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label2 = label.Label(font=fontList[0], text=myString23, color=0x000000, max_glyphs=len(myString23),
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background_color=0xFFFF00,
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padding_bottom=label2_padding,
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padding_left=0,
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padding_right=0,
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padding_top=label2_padding,
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background_tight=False,
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x=10,
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y=100,
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line_spacing=1.25,
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scale=my_scale,
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anchor_point=(0,0),
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anchored_position=(200,150),
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)
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label3 = label.Label(font=fontList[0], text=myString23, color=0x000000, max_glyphs=len(myString23),
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background_color=0xFFFF00,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=True,
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x=10,
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y=150,
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line_spacing=1.25,
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scale=my_scale,
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)
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label4 = label.Label(font=fontList[0], text=myString_label, color=0x000000, max_glyphs=len(myString_label),
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background_color=0xFFFF00,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=True,
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x=10,
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y=200,
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line_spacing=1.25,
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scale=my_scale,
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)
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myString5 = '<-- label'
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label5 = label.Label(font=fontList[0], text=myString5, color=0xFFFFFF, max_glyphs=len(myString5),
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background_color=0x000000,
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padding_bottom=0,
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padding_left=0,
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padding_right=0,
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padding_top=0,
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background_tight=False,
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x=10,
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y=200,
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line_spacing=1.25,
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anchor_point=(0,0.5),
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anchored_position=(50,200),
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scale=my_scale,
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)
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gc.collect()
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label_end=gc.mem_free()
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label_group = displayio.Group( max_size=5 ) # Create a group for displaying
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label_group.append(label1)
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label_group.append(label2)
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label_group.append(label3)
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label_group.append(label4)
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label_group.append(label5)
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print('***')
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display.auto_refresh=True
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while True:
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print('bitmap_label')
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time.sleep(0.1)
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display.show(bmap_group)
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time.sleep(2)
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print('label')
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time.sleep(0.1)
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display.show(label_group)
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time.sleep(2)
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