pygame-chart

pygameChart

Introduction

Welcome to pygameChart! This package provides a simple and flexible way to create charts and plots within a pygame application. With pygameChart, you can easily visualize data and display in your applications in an appealing way. Its structure to define figure parameters and charts is similar to matplotlib for ease of use.

• Support for line plots, bar charts, and scatter plots (more on the way)
• Customization options for chart appearanve and behavior
• Easy integration within pygame event loop, therefore ability to change content during the game and/or app I hope pygameChart will be useful addition to your pyhame projects. Continue reading for installation and use of the package

Installation

Please consider project page on Github, https://github.com/enessafak/pygameChart. The module requires python>=3.9.10 and pygame>=2.1.2

Quickstart

pygameChart provides a simple use (similar to matplotlib) to create figure, set properties (like title, label names, chart limits etc.) and add several charts. In this phase it supports line plot, scatter plot and bar charts. Also in this phase, it accepts x and y axis data as two separate lists. I will add support for accepting different datatypes like dictionary numpy arrays or pandas series and dataframes.

Basic use of the package creates following result.

Basic figure with line chart

import pygame, sys
import pygame_chart as pyc

# pygame app for figure to run
pygame.init()
screen = pygame.display.set_mode((800,600))

# Figure instance on screen with position and size
figure = pyc.Figure(screen, 50, 50, 700, 500)

while True:
    events = pygame.event.get()
    for event in events:
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    # add a line chart. First argument "name" should be unique for every chart
    figure.line('Chart1', [1,2,3,4,6,20,24],[3,5,7,2,7,9,1])
    # draw figure with specified properties
    figure.draw()    
    pygame.display.update()

Figure with several charts and properties

import pygame, sys
import pygame_chart as pyc

# pygame app for figure to run
pygame.init()
screen = pygame.display.set_mode((800,600))

# Figure instance on screen with position and size
figure = pyc.Figure(screen, 50, 50, 700, 500)

while True:
    events = pygame.event.get()
    for event in events:
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    # Add chart title with a title
    figure.add_title('pygameChart Example')
    # Add legend and gridlimes
    figure.add_legend()
    figure.add_gridlines()
    # add a line chart. First argument "name" should be unique for every chart
    figure.line('LineChart', [1,2,3,4,6,20,24],[3,5,7,2,7,9,1])
    figure.bar('BarChart', [1,2,3,4,10,18,24],[4,3,9,2,7,12,5])
    figure.scatter('ScatterChart', [-4,3,6,8,12,16,20],[2,4,12,5,6,3,8])
    # draw figure with specified properties
    figure.draw()    
    pygame.display.update()

Documentation

This documentation provides classes in pygameChart with relative methods and attributes. Default values for initiations are given as global variables and can be modified in settings.py. Only class the end user should use is Figure class. For the rest, only relevant method or attributes will be mentioned.

Figure class

pygameChart.Figure(screen, x, y, width, height, bg_color=BG_COLOR)

Parameters

Parameter	Type	Explanation
screen	pygame.display	Main display for figure to be drawn
x	number	Position of figure at x axis
y	number	Position of figure at y axis
width	number	Width of the figure
height	number	Height of the figure
bg_color	RGB tuple (r,g,b)	Background color of the figure

Methods

• set_xlim(xlim) : Sets xmin and xmax for all charts. Drawings out of these limits are unvisible
  • xlim : tuple : (xmin, xmax)
• set_ylim(ylim) : Sets ymin and ymax for all charts. Drawings out of these limits are unvisible \
  • ylim : tuple : (ymin, ymax)
• add_title(title) : Adds chart title to the top of the figure
  • title : string : chart title
• add_legend() : Adds legend to the bottom of the figure
• add_yaxis_label(label) : Adds label for y-axis
  • label : string : y-axis label
• add_xaxis_label(label) : Adds label for x-axis
  • label : string : x-axis label
• add_gridlines() : Adds gridlines to the figure
• line(name, xdata, ydata, color=None, line_width=2) : Adds line chart to the figure
  • name : string : Name of the chart. Name of each chart should be unique to be drawn. Otherwise, former chart data is updated with the latter
  • xdata : list : x-axis data. List must be all numbers or all strings
  • ydata : list : y-axis data. List must be all numbers
  • color : tuple : RGB tuple (r,g,b). Default value chooses the next unused color from settings.py
  • line_width : int : Width of the line
• bar(name, xdata, ydata, color=None, bar_width=None) : Adds bar chart to the figure
  • name : string : Name of the chart. Name of each chart should be unique to be drawn. Otherwise, former chart data is updated with the latter
  • xdata : list : x-axis data. List must be all numbers or all strings
  • ydata : list : y-axis data. List must be all numbers
  • color : tuple : RGB tuple (r,g,b). Default value chooses the next unused color from settings.py
  • bar_width : int : Width of the bar. If none, bar width is calculated according to figure size and x data range
• scatter(name, xdata, ydata, color=None, radius=3): Adds scatter chart to the figure
  • name : string : Name of the chart. Name of each chart should be unique to be drawn. Otherwise, former chart data is updated with the latter
  • xdata : list : x-axis data. List must be all numbers or all strings
  • ydata : list : y-axis data. List must be all numbers
  • color : tuple : RGB tuple (r,g,b). Default value chooses the next unused color from settings.py
  • radius : int : Radius of the circle
• draw() : Draws the figure with set properties and charts. Final method to draw and show the figure on screen

Area class

Base object for figure areas: title, legend, x-y axis labels, x-y axis ticks and chart area

pygameChart.Area(figure)

Attributes

Attribute	Type	Explanation
figure	pygame.Chart.Figure	Main Figure object
x	number	Position of area at x axis (rel. to figure)
y	number	Position of area at y axis (rel. to figure)
width	number	Width of the area
height	number	Height of the area
innerx	number	Inner x position for padding
innery	number	Inner x position for padding
innerwidth	number	Inner width for padding
innerheight	number	Inner height for padding
show	boolean	draw condition for the area

Methods

• draw_area() : Draws the area on figure background, with figure.bg_color fill
• draw_area_border(): Draws the area on figure background, with border, without fill

Title(Area) Class

Class for adding and writing chart title

Legend(Area) Class

Class for calculating legend position, content and writing

yAxisLabel(Area) Class

Class for adding and writing y-axis label

xAxisLabel(Area) Class

Class for adding and writing x-axis label

yAxisTick(Area) Class

Class for calculating x-tick position, content and writing

Attributes

Attribute	Type	Explanation
ymin	number	Min value for y-ticks. Might be different than chart data. Overwritten by Figure.ylim
ymax	number	Min value for y-ticks. Might be different than chart data. Overwritten by Figure.ylim

xAxisTick(Area) Class

Class for calculating y-tick position, content and writing

Attributes

Attribute	Type	Explanation
xmin	number	Min value for xx-ticks. Might be different than chart data. Overwritten by Figure.xlim
xmax	number	Min value for x-ticks. Might be different than chart data. Overwritten by Figure.xlim

ChartArea(Area) Class

Class for calculating chart positioning and drawing

Attributes

Attribute	Type	Explanation
charts	list	List of chart objects added to the figure
chart_names	list	List of chart names added to the figure
chart_margin	int	Padding for left and right border
xdata_type	str	Indicates the type of xdata (number or string). If figure.xlim is set, it becomes number. Otherwise, it is determined by the first chart to be added. Charts with other type of xdata cannot be added later
gridlines	boolean	If gridlines will be added to the figure

ChartType Class

Base class for all chart types

LineChart(ChartType) Class

Class for keeping properties of line chart. Drawing is done within Figure.ChartArea

Parameters

Parameter	Type	Explanation
name	string	Name of the chart
xdata	list	x-axis data. List must be all numbers or all strings
ydata	list	y-axis data. List must be all numbers
color	tuple	RGB tuple (r,g,b). Default value chooses the next unused color from settings.py
line_width	int	Width of the line

BarChart(ChartType) Class

Class for keeping properties of bar chart. Drawing is done within Figure.ChartArea

Parameters

Parameter	Type	Explanation
name	string	Name of the chart
xdata	list	x-axis data. List must be all numbers or all strings
ydata	list	y-axis data. List must be all numbers
color	tuple	RGB tuple (r,g,b). Default value chooses the next unused color from settings.py
bar_width	int	Width of the bar. If none, bar width is calculated according to figure size and x data range

ScatterChart(ChartType) Class

Class for keeping properties of scatter chart. Drawing is done within Figure.ChartArea

Parameters

Parameter	Type	Explanation
name	string	Name of the chart
xdata	list	x-axis data. List must be all numbers or all strings
ydata	list	y-axis data. List must be all numbers
color	tuple	RGB tuple (r,g,b). Default value chooses the next unused color from settings.py
radius	int	Radius of the circle

License

The MIT License (MIT)

Copyright (c) 2023

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.