312 lines
10 KiB
Python
312 lines
10 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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"""
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Inky-Calendar custom-functions for ease-of-use
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Copyright by aceisace
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"""
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import logging
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from PIL import Image, ImageDraw, ImageFont, ImageColor
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from urllib.request import urlopen
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import os
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import time
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# Get the path to the Inky-Calendar folder
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top_level = os.path.dirname(
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os.path.abspath(os.path.dirname(__file__))).split('/inkycal')[0]
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# Get path of 'fonts' and 'images' folders within Inky-Calendar folder
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fonts_location = top_level + '/fonts/'
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images = top_level + '/images/'
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# Get available fonts within fonts folder
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fonts = {}
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for path,dirs,files in os.walk(fonts_location):
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for filename in files:
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if filename.endswith('.otf'):
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name = filename.split('.otf')[0]
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fonts[name] = os.path.join(path, filename)
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if filename.endswith('.ttf'):
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name = filename.split('.ttf')[0]
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fonts[name] = os.path.join(path, filename)
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del name, filename, files
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available_fonts = [key for key,values in fonts.items()]
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def get_fonts():
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"""Print all available fonts by name"""
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for fonts in available_fonts:
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print(fonts)
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def get_system_tz():
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"""Get the timezone set by the system"""
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try:
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local_tz = time.tzname[1]
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except:
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print('System timezone could not be parsed!')
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print('Please set timezone manually!. Setting timezone to None...')
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local_tz = None
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return local_tz
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def auto_fontsize(font, max_height):
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"""Adjust the fontsize to fit 80% of max_height
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returns the font object with modified size"""
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fontsize = font.getsize('hg')[1]
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while font.getsize('hg')[1] <= (max_height * 0.80):
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fontsize += 1
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font = ImageFont.truetype(font.path, fontsize)
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return font
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def write(image, xy, box_size, text, font=None, **kwargs):
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"""Write text on specified image
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image = on which image should the text be added?
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xy = xy-coordinates as tuple -> (x,y)
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box_size = size of text-box -> (width,height)
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text = string (what to write)
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font = which font to use
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"""
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allowed_kwargs = ['alignment', 'autofit', 'colour', 'rotation',
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'fill_width', 'fill_height']
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# Validate kwargs
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for key, value in kwargs.items():
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if key not in allowed_kwargs:
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print('{0} does not exist'.format(key))
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# Set kwargs if given, it not, use defaults
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alignment = kwargs['alignment'] if 'alignment' in kwargs else 'center'
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autofit = kwargs['autofit'] if 'autofit' in kwargs else False
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fill_width = kwargs['fill_width'] if 'fill_width' in kwargs else 1.0
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fill_height = kwargs['fill_height'] if 'fill_height' in kwargs else 0.8
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colour = kwargs['colour'] if 'colour' in kwargs else 'black'
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rotation = kwargs['rotation'] if 'rotation' in kwargs else None
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x,y = xy
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box_width, box_height = box_size
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# Increase fontsize to fit specified height and width of text box
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if (autofit == True) or (fill_width != 1.0) or (fill_height != 0.8):
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size = 8
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font = ImageFont.truetype(font.path, size)
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text_width, text_height = font.getsize(text)[0], font.getsize('hg')[1]
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while (text_width < int(box_width * fill_width) and
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text_height < int(box_height * fill_height)):
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size += 1
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font = ImageFont.truetype(font.path, size)
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text_width, text_height = font.getsize(text)[0], font.getsize('hg')[1]
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text_width, text_height = font.getsize(text)[0], font.getsize('hg')[1]
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# Truncate text if text is too long so it can fit inside the box
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if (text_width, text_height) > (box_width, box_height):
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logging.debug(('truncating {}'.format(text)))
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while (text_width, text_height) > (box_width, box_height):
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text=text[0:-1]
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text_width, text_height = font.getsize(text)[0], font.getsize('hg')[1]
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logging.debug((text))
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# Align text to desired position
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if alignment == "center" or None:
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x = int((box_width / 2) - (text_width / 2))
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elif alignment == 'left':
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x = 0
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elif alignment == 'right':
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x = int(box_width - text_width)
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y = int((box_height / 2) - (text_height / 2))
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# Draw the text in the text-box
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draw = ImageDraw.Draw(image)
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space = Image.new('RGBA', (box_width, box_height))
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ImageDraw.Draw(space).text((x, y), text, fill=colour, font=font)
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# Uncomment following two lines, comment out above two lines to show
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# red text-box with white text (debugging purposes)
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## space = Image.new('RGBA', (box_width, box_height), color= 'red')
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## ImageDraw.Draw(space).text((x, y), text, fill='white', font=font)
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if rotation != None:
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space.rotate(rotation, expand = True)
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# Update only region with text (add text with transparent background)
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image.paste(space, xy, space)
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def text_wrap(text, font=None, max_width = None):
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"""Split long text (text-wrapping). Returns a list"""
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lines = []
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if font.getsize(text)[0] < max_width:
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lines.append(text)
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else:
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words = text.split(' ')
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i = 0
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while i < len(words):
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line = ''
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while i < len(words) and font.getsize(line + words[i])[0] <= max_width:
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line = line + words[i] + " "
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i += 1
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if not line:
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line = words[i]
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i += 1
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lines.append(line)
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return lines
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def internet_available():
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"""check if the internet is available"""
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try:
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urlopen('https://google.com',timeout=5)
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return True
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except URLError as err:
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return False
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def draw_border(image, xy, size, radius=5, thickness=1, shrinkage=(0.1,0.1)):
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"""Draws a border with round corners at (x,y)
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xy = position e.g: (5,10)
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size = size of border (width, height), radius: corner radius
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thickness = border thickness
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shrinkage = shrink and center border by given percentage:(width_%, height_%)
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"""
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colour='black'
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# size from function paramter
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width, height = int(size[0]*(1-shrinkage[0])), int(size[1]*(1-shrinkage[1]))
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# shift cursor to move rectangle to center
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offset_x, offset_y = int((size[0] - width)/2), int((size[1]- height)/2)
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x, y, diameter = xy[0]+offset_x, xy[1]+offset_y, radius*2
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# lenght of rectangle size
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a,b = (width - diameter), (height-diameter)
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# Set coordinates for staright lines
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p1, p2 = (x+radius, y), (x+radius+a, y)
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p3, p4 = (x+width, y+radius), (x+width, y+radius+b)
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p5, p6 = (p2[0], y+height), (p1[0], y+height)
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p7, p8 = (x, p4[1]), (x,p3[1])
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if radius != 0:
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# Set coordinates for arcs
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c1, c2 = (x,y), (x+diameter, y+diameter)
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c3, c4 = ((x+width)-diameter, y), (x+width, y+diameter)
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c5, c6 = ((x+width)-diameter, (y+height)-diameter), (x+width, y+height)
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c7, c8 = (x, (y+height)-diameter), (x+diameter, y+height)
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# Draw lines and arcs, creating a square with round corners
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draw = ImageDraw.Draw(image)
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draw.line( (p1, p2) , fill=colour, width = thickness)
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draw.line( (p3, p4) , fill=colour, width = thickness)
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draw.line( (p5, p6) , fill=colour, width = thickness)
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draw.line( (p7, p8) , fill=colour, width = thickness)
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if radius != 0:
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draw.arc( (c1, c2) , 180, 270, fill=colour, width=thickness)
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draw.arc( (c3, c4) , 270, 360, fill=colour, width=thickness)
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draw.arc( (c5, c6) , 0, 90, fill=colour, width=thickness)
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draw.arc( (c7, c8) , 90, 180, fill=colour, width=thickness)
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"""Not required anymore?"""
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##def clear_image(section, colour = background_colour):
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## """Clear the image"""
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## width, height = eval(section+'_width'), eval(section+'_height')
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## position = (0, eval(section+'_offset'))
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## box = Image.new('RGB', (width, height), colour)
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## image.paste(box, position)
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##
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## if three_colour_support == True:
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## image_col.paste(box, position)
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"""Not required anymore?"""
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##def crop_image(input_image, section):
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## """Crop an input image to the desired section"""
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## x1, y1 = 0, eval(section+'_offset')
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## x2, y2 = eval(section+'_width'), y1 + eval(section+'_height')
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## image = input_image.crop((x1,y1,x2,y2))
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## return image
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"""Not required anymore?"""
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##def image_cleanup():
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## """Delete all files in the image folder"""
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## print('Cleanup of previous images...', end = '')
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## for temp_files in glob(image_path+'*'):
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## os.remove(temp_files)
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## print('Done')
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##def optimise_colours(image, threshold=220):
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## buffer = numpy.array(image.convert('RGB'))
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## red, green = buffer[:, :, 0], buffer[:, :, 1]
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## buffer[numpy.logical_and(red <= threshold, green <= threshold)] = [0,0,0] #grey->black
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## image = Image.fromarray(buffer)
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## return image
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##
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##def calibrate_display(no_of_cycles):
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## """How many times should each colour be calibrated? Default is 3"""
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## epaper = driver.EPD()
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## epaper.init()
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##
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## white = Image.new('1', (display_width, display_height), 'white')
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## black = Image.new('1', (display_width, display_height), 'black')
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##
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## print('----------Started calibration of E-Paper display----------')
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## if 'colour' in model:
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## for _ in range(no_of_cycles):
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## print('Calibrating...', end= ' ')
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## print('black...', end= ' ')
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## epaper.display(epaper.getbuffer(black), epaper.getbuffer(white))
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## print('colour...', end = ' ')
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## epaper.display(epaper.getbuffer(white), epaper.getbuffer(black))
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## print('white...')
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## epaper.display(epaper.getbuffer(white), epaper.getbuffer(white))
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## print('Cycle {0} of {1} complete'.format(_+1, no_of_cycles))
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## else:
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## for _ in range(no_of_cycles):
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## print('Calibrating...', end= ' ')
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## print('black...', end = ' ')
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## epaper.display(epaper.getbuffer(black))
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## print('white...')
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## epaper.display(epaper.getbuffer(white)),
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## print('Cycle {0} of {1} complete'.format(_+1, no_of_cycles))
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##
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## print('-----------Calibration complete----------')
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## epaper.sleep()
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"""Not required anymore?"""
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##def check_for_updates():
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## with open(path+'release.txt','r') as file:
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## lines = file.readlines()
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## installed_release = lines[0].rstrip()
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## temp = subp.check_output(['curl','-s','https://github.com/aceisace/Inky-Calendar/releases/latest'])
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## latest_release_url = str(temp).split('"')[1]
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## latest_release = latest_release_url.split('/tag/')[1]
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##
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## def get_id(version):
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## if not version.startswith('v'):
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## print('incorrect release format!')
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## v = ''.join(version.split('v')[1].split('.'))
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## if len(v) == 2:
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## v += '0'
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## return int(v)
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##
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## if get_id(installed_release) < get_id(latest_release):
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## print('New update available!. Please update to the latest version')
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## print('current release:', installed_release, 'new version:', latest_release)
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## else:
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## print('You are using the latest version of the Inky-Calendar software:', end = ' ')
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## print(installed_release)
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