wpf - Grid-Like WrapPanel with resizable control in WPF

Question

I want to make a grid with wrap panel behavior and resizable control inside it, how can I do this? maybe it's easier to show what I want in images :

initial state:

resize control 1 with direction bottom-right so it will take around 2x2 cells, then control 2 and so on will rearrange it's position on the grid:

when it's resized back it should be back to initial state.