Own hat qml qt quick?

Question

Qt

Maybe someone did and is ready to share, or drop articles with examples.
You need to make your own header:
1) minimize button
2) maximize button
3) area for dragging the window

Answer 1

methods for collapsing expand, and a method for dragging

Answer 2

And what is the complexity, what is not clear?
How to draw a button?
How to call the method to collapse/expand?
How to move a window using MouseArea?