Queue representation graph over time

[Tzachi Cohen]

Hi all,

I am looking to leverage an existing example/Qt class to create a diagram that represent state of queues over time.
To show how they are filled and how they are consumed over a period. I need to be able to squash and stretch the diagram over the X axis (time).
I wish to use a 2D block diagram similar to the image in below.
Does anyone know of an existing QT class/ example that I can use?
What would be the recommended implementation strategy for such diagram if an existing class can't be found. (which Qt classes should I use) .

Sincerely

Tzachi Cohen