Qt5 Python GUI Programming Cookbook

How it works...

To draw a rectangle between the mouse button pressed and released locations, we will be making use of two methods, mousePressEvent() and mouseReleaseEvent(). The mousePressEvent() method is automatically invoked when a mouse button is pressed and the mouseReleaseEvent() method is automatically invoked when the mouse button is released. In these two methods, we will be simply saving the values of the x and y coordinates where the mouse button is clicked and released respectively. Two arrays, pos1 and pos2, are defined, where the pos1 array stores the x and y coordinates of the location where the mouse button is clicked and the pos2 array stores the x and y coordinates of the location where the mouse button is released. The ...