Qt5 Python GUI Programming Cookbook

How it works...

The triggered() signal of the action of each menu item is connected to its respective method. The triggered() signal of the actionDraw_Circle menu item is connected to the drawCircle() method, so that whenever the Draw Circle menu item is selected from the menu bar, the drawCircle() method will be invoked. Similarly, the triggered() signal of the actionDraw_Rectangle and actionDraw_Line menus are connected to the drawRectangle() and drawLine() methods respectively. In the drawCircle() method, the toDraw variable is assigned a string, circle. The toDraw variable will be used to determine the graphics to be drawn in the paintEvent method. The toDraw variable can be assigned any of the three strings, line, circle, or rectangle ...