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PyQtGraph – Getting Minimum Size of Plot Window
  • Last Updated : 24 Sep, 2020

In this article we will see how we can get minimum size of the plot window 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).Plot windows consist of two main parts: the Plot Panel containing the actual plotted graphics and the Control Panel. By default plot window can be resized, by setting minimum size we assure that user will not be able to resize the window below the minimum size point. It can be set with the help of setMinimumSize method.

We can create a plot window with the help of command given below

# creating a pyqtgraph plot window
window = pg.plot()

In order to do this we use minimumSize method with the plot window object

Syntax : window.minimumSize()

Argument : It takes no argument



Return : It returns QSize object

Below is the implementation

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# importing pyqtgraph as pg
import pyqtgraph as pg
  
# importing QtCore and QtGui from the pyqtgraph module
from pyqtgraph.Qt import QtCore, QtGui
  
# importing numpy as np
import numpy as np
  
import time
  
# creating a pyqtgraph plot window
window = pg.plot()
  
# setting window geometry
# left = 100, top = 100
# width = 600, height = 500
window.setGeometry(100, 100, 600, 500)
  
# title for the plot window
title = "GeeksforGeeks PyQtGraph"
  
# setting window title to plot window
window.setWindowTitle(title)
  
# create list for y-axis
y1 = [5, 5, 7, 10, 3, 8, 9, 1, 6, 2]
  
# create horizontal list i.e x-axis
x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  
# create pyqt5graph bar graph item 
# with width = 0.6
# with bar colors = green
bargraph1 = pg.BarGraphItem(x = x, height = y1, width = 0.6, brush ='g')
  
# add item to plot window
# adding bargraph item to the window
window.addItem(bargraph1)
  
# setting minimum size of plot window
window.setMinimumSize(200, 300)
  
# getting minimum plot window size
value = window.minimumSize()
  
# printing the value
print("Minimum Size : " + str(value))
  
  
  
# main method
if __name__ == '__main__':
      
    # importing system
    import sys
      
    # Start Qt event loop unless running in interactive mode or using 
    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()
         

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Output :

Minimum Size : PyQt5.QtCore.QSize(200, 300)

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