PyQtGraph – Getting Painter Path of Bar Graph
Last Updated :
25 Sep, 2020
In this article we will see how we can get painter path of the bar graph in the PyQtGraph module. PyQtGraph is a graphics and user interface library for Python that provides functionality commonly required in designing and science applications. Its primary goals are to provide fast, interactive graphics for displaying data (plots, video, etc.) and second is to provide tools to aid in rapid application development (for example, property trees such as used in Qt Designer).A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a column chart. A painter path is an object composed of a number of graphical building blocks, such as rectangles, ellipses, lines, and curves. Building blocks can be joined in closed subpaths, for example as a rectangle or an ellipse.
We can create a plot window and bar graph with the help of commands given below
# creating a pyqtgraph plot window
window = pg.plot()
# creating a bar graph of green color
bargraph = pg.BarGraphItem(x=x, height=y1, width=0.6, brush='g')
In order to do this we use shape
method with the bar graph object
Syntax : bargraph.shape()
Argument : It takes no argument
Return : It returns QPainterPath object
Below is the implementation
from PyQt5.QtGui import * from PyQt5.QtCore import Qt
import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
import numpy as np
import time
window = pg.plot()
icon = QIcon( "logo.png" )
window.setWindowIcon(icon)
window.setGeometry( 100 , 100 , 600 , 500 )
title = "GeeksforGeeks PyQtGraph"
window.setWindowTitle(title)
y1 = [ 5 , 5 , 7 , 10 , 3 , 8 , 9 , 1 , 6 , 2 ]
x = [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]
bargraph = pg.BarGraphItem(x = x, height = y1, width = 0.6 , brush = 'g' )
window.addItem(bargraph)
value = bargraph.shape()
print ( "Shape : " + str (value))
if __name__ = = '__main__' :
import sys
if (sys.flags.interactive ! = 1 ) or not hasattr (QtCore, 'PYQT_VERSION' ):
QtGui.QApplication.instance().exec_()
|
Output :
Shape : PyQt5.QtGui.QPainterPath object at 0x0000025679678CF0
Like Article
Suggest improvement
Share your thoughts in the comments
Please Login to comment...