Different "sticky" actionbars possible? (info inside)

[Graloth]

Greetings

This is basically something i would like to work with if its possible, so before i get started, thanks to all who help answer the question

Is it possible to make each button have a background texture that changes depending on how many buttons are stuck to it and what sides they are on?

image examples:


The grey border symbolizes the background and how it should "warp" to surround the buttons that are "stuck" together, aswell as buttons only form a "group" if their sides are stuck together, not corners.

The buttons stuck together on the sides should still be adjustable in the directions following the side that is stuck to the order button, example:

2 buttons are stuck together , left side on right side, the buttons can be moved individually up or down, (using a key modifier here is probably best), once their "movement" reaches so that its only their corners that are stuck, they are nolonger "grouped"

Is all this possible? granted, there should most likely be used some key modifies to control the buttons (ALT, CTRL or SHIFT), but in general, would this be possible?

Once more, thanks in advance for the help.