pdfCalendar.py

from reportlab.lib.pagesizes import A4
from reportlab.lib.units import cm 
from reportlab.platypus import  Table, TableStyle, Paragraph
from reportlab.pdfgen import canvas
from reportlab.lib import colors
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib.enums import TA_JUSTIFY, TA_LEFT, TA_CENTER


import os
import datetime
from calendar import monthrange
import calendar

###########################################################################################
class MyCalendar:

	def __init__(self):
		self.individualDateTextBoxSize = (0.7 * cm, 0.7 * cm)
		self.monthPositions = []
		self.days = ['Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su']
		self.year = 2021 
		self.saveName ="myCalendarPDF.pdf"

	###############################################################
	def makeYear(self,year, name):

		# saveName = "calendar3.pdf"
		self.year = year
		self.saveName = name + ".pdf"
		myCanvas = canvas.Canvas(self.saveName, pagesize=A4)

		row = 0
		self.setMonthPositions()
		# year = 2019
		for x in range(0,12):
			if x % 3 == 0:
				row += 1
			self.printMonth(x,self.year, self.monthPositions[x][0], self.monthPositions[x][1], myCanvas )
		myCanvas.setFont( 'Helvetica', 16 )	
		myCanvas.drawCentredString(A4[0] / 2 ,  A4[1] - 1.5 * cm, str(self.year))
		self.fillMonthNames(myCanvas)
		myCanvas.save()

	# Positions for all the months from the left edge and the top edge, in cm
	###############################################################
	def setMonthPositions(self):
		letftMargin = 2.0  * cm 

		verticalGap = (21 * cm  - letftMargin * 2 - self.individualDateTextBoxSize[0] * 7  )  /  2
		#	leftMargin = ( width - individualDateTextBoxSize[0] * 3 + verticalGap ) / 2 
		row = 0
		for x in range(0,12):
			if x % 3 == 0:
				row += 1
			
			self.monthPositions.append( ( letftMargin + (x % 3 ) * verticalGap, row * 6.5 * cm + 2 * cm ) )
	###############################################################
	def fillMonthNames(self, canvas):
		for x in range(0,12):
			textobject = canvas.beginText()
			textobject.setTextOrigin( self.monthPositions[x][0] , 7 * self.individualDateTextBoxSize[0] + A4[1] - self.monthPositions[x][1]  )
			textobject.setFont("Helvetica", 14)
			textobject.textOut(calendar.month_name[x + 1])
			canvas.drawText(textobject)

	###############################################################
	def coord(self, x, y, unit=1):
		x, y = x * unit, A4[1] -  y * unit
		return x, y

	###############################################################
	def printMonth(self, month, year, x, y, myCanvas):
		monthMatrix= []
		monthMatrix.insert(0,self.days)  
		
		oneWeekArray = []

		total_days = monthrange(year, month + 1)[1]
		weekStarts = monthrange(year, month + 1)[0]

		date = 0

		#This starts filling out the actual date numerals into an array . This is simply the actual numerals, no sense of spcing eytc. That comes later at printing time.	
		weekStartpadding = 0
		for _  in range(0,6):
			oneWeekArray = []
			for _ in range(1,8):
				weekStartpadding += 1
				if weekStartpadding <= weekStarts:
					oneWeekArray.append(' ')
				else:
					date = date + 1
					if date > total_days :
						break
					oneWeekArray.append(date)
			
			monthMatrix.append(oneWeekArray)	# this is collecting the full month, which will be printed.

		
		t = Table(monthMatrix, 7*[self.individualDateTextBoxSize[0]], 7*[self.individualDateTextBoxSize[1]], hAlign='LEFT')   # data now goes into a table, ready for printing. This is where we set alignment etc.
		t.setStyle(TableStyle([
								('TEXTCOLOR',(0,0),(-1,0),colors.red),
								('TEXTCOLOR',(-1,-1),(0,-1),colors.blue),

								('ALIGN',(0,0),(-1,-1),'RIGHT'),
								('VALIGN',(0,-1),(-1,-1),'MIDDLE'),

								##('INNERGRID', (0,0), (-1,-1), 0.25, colors.black),
								##('BOX', (0,0), (-1,-1), 0.25, colors.black),

							]))

		t.wrapOn(myCanvas, A4[0], A4[1])
		t.drawOn(myCanvas, *self.coord(x, y,1))

#################################################################

cal = MyCalendar()
cal.makeYear(2022, name="2022 calendar")