Feature request: Excel like fill series

[ottosson]

Would it be relevant to include a fill series (a.k.a. fill range, drag fill, fill handle) feature to this project?

Much like in Excel it would be great to be able to copy cells in a datagrid using a fill handle to drag corner of selected cells to copy the content.

[tom-englert]

Actually in the DataGrid you just click into a cell and drag the mouse to select a rectangle.
If you have an idea how to improve this, I'm happy to accept your PR.

[ottosson]

I'm sorry, my screenshots are unclear.
I don't just want to select cells, I want to copy values by dragging the fill handle, like in excel:

[tom-englert]

I see what you mean, duplicate selected items inside the same grid.