Bar charts in PDF file

Vertical Bar chart

from reportlab.graphics.charts.barcharts import VerticalBarChart

data = [
 (13, 15, 20, 22, 37, 42, 19, 4),
 (14, 16, 21, 23, 38, 41, 20, 5)
]

Category Axis and Value Axis

from reportlab.lib import colors
my_path='G:\\My drive\\testing\\pypdf2\\my_pdf.pdf' 
from reportlab.graphics.shapes import Drawing
from reportlab.graphics.charts.barcharts import VerticalBarChart
d = Drawing(600, 400) # width , height 
bc = VerticalBarChart()
data = [
 (13, 15, 20, 22, 37, 42, 19, 4),
 (14, 16, 21, 23, 38, 41, 20, 5)
]

bc.x = 50  # horizontal position
bc.y = 50  # vertical position 
bc.height = 340 # height of the chart area
bc.width = 530  # width of the chart area
bc.data = data
bc.strokeColor = colors.black # bar edges colour 

bc.bars[0].fillColor = colors.yellow  # first member of group bar 
bc.bars[1].fillColor = colors.lightgreen # second member of group 
bc.groupSpacing = 10  # gap between groups 
bc.barSpacing = 2.5   # gap within groups ( among members ) 
bc.valueAxis.valueMin = 0 # value Axis 
bc.valueAxis.valueMax = 50
bc.valueAxis.valueStep = 10
bc.categoryAxis.labels.boxAnchor = 'ne'
bc.categoryAxis.labels.dx = 5 
bc.categoryAxis.labels.dy = -2
bc.categoryAxis.labels.angle = 30
#bc.categoryAxis.style = 'stacked' # stacked bar graph, parallel 
bc.categoryAxis.categoryNames = ['Jan-22','Feb-22','Mar-22',
 'Apr-22','May-22','Jun-22','Jul-22','Aug-22']
d.add(bc, '')
from reportlab.graphics import renderPDF
renderPDF.drawToFile(d, my_path, '')

Background colour of the chart

bc.fillColor=colors.yellow # background colour

Colour of bars

bc.bars[0].fillColor=colors.yellow #first member of group bar 
bc.bars[1].fillColor=colors.lightgreen # second member of group bar 

Colour of individual bar

bc.bars[(0, 0)].fillColor = colors.blue # left bar of first group
bc.bars[(0, 1)].fillColor = colors.yellow # left bar of second group
bc.bars[(1,2)].fillColor=colors.red # right bar of 3rd group

Horizontal bar chart

from reportlab.lib import colors
my_path='G:\\My drive\\testing\\pypdf2\\my_pdf.pdf' 
from reportlab.graphics.shapes import Drawing
from reportlab.graphics.charts.barcharts import HorizontalBarChart
d=Drawing(620,400) # width , height
#bc=VerticalBarChart()
bc=HorizontalBarChart()
data = [
 (13, 15, 20, 22, 37, 42, 19, 4),
 (14, 16, 21, 23, 38, 41, 20, 5)
]
bc.x = 50  # horizontal position
bc.y = 50  # vertical position 
bc.height = 345 # height of the chart area
bc.width = 545  # width of the chart area
bc.data = data
bc.strokeColor = colors.black
#bc.fillColor=colors.yellow
bc.bars[0].fillColor=colors.yellow
bc.bars[1].fillColor=colors.lightgreen
bc.bars[(0,5)].fillColor=colors.red
bc.groupSpacing = 8
bc.barSpacing = 2
bc.valueAxis.valueMin = 0
bc.valueAxis.valueMax = 50
bc.valueAxis.valueStep = 5
bc.categoryAxis.labels.boxAnchor = 'ne'
bc.categoryAxis.labels.dx = -10
bc.categoryAxis.labels.dy = 5
bc.categoryAxis.labels.angle = 30
bc.categoryAxis.categoryNames = ['Jan-22','Feb-22','Mar-22',
 'Apr-22','May-22','Jun-22','Jul-22','Aug-22']
d.add(bc, '')

from reportlab.graphics import renderPDF
renderPDF.drawToFile(d, my_path, '')

Stacked chart

bc.categoryAxis.style='stacked'

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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