QT Quick
The 3 things todo list is based on the idea that you will be more productive if you pick just 3 things that you need to achieve each day. There are a few blog posts out there explaining the reasoning behind it such as The Power of the Three-Item To-Do List and Accomplish More with a 3-Item To Do List. This tutorial series walks through making a simple version of this in QtQuick.
Qt Quick Tutorial: 3 Things To Do List Part 1 - Setup
Setup your environmentQt Quick Tutorial: 3 Things To Do List Part 2 - Adding Data
Add tasksQt Quick Tutorial: 3 Things To Do List Part 3 - Filtering
Limit the "Today" view to only the three things we want to see.Qt Quick Tutorial: 3 Things To Do List Part 4 - Interactivity
Make it interactiveQt Quick Tutorial: 3 Things To Do List Part 5 - Adding a Database
Add a C++ database.QT Quick Tutorial: 3 Things To Do List Part 6 - Linking the Database
Link the database to the app.