While the example program we created earlier has very limited user interaction, it is quite possible to build your program to directly use the QGIS user interface elements such as the status bar, the message bar, progress indicators, and the QGIS logging window. You can also create custom forms and windows so that the output of your program looks just like any other feature of QGIS itself. Let's take a closer look at how some of these QGIS user-interface elements can be used from within your Python programs.
The QGIS window has a status bar. You can use it to display the current status of your Python program, for example:
The status message ...