In this article we will see how we can set a custom cursor to the line of line 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.) A line chart or line plot or line graph or curve chart is a type of chart that displays information as a series of data points called ‘markers’ connected by straight line segments. It is a basic type of chart common in many fields. Line graph is created with the help of plot class in PyQtGraph. Cursor is an indicator used to show the current position for user interaction on a computer monitor or other display device that will respond to input from a text input or pointing device. The mouse cursor is also called a pointer, owing to its resemblance in usage to a pointing stick.
We can create a plot window and create lines on it with the help of commands given below
# creating a pyqtgraph plot window plt = pg.plot() # ploting line in green color # with dot symbol as x, not a mandatory field line = plt.plot(x, y, pen='g', symbol='x', symbolPen='g', symbolBrush=0.2, name='green')
In order to do this we use setCursor method with the line object
Syntax : line.setCursor(cursor)
Argument : It takes QCursor object as argument
Return : It returns None
Below is the implementation
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