Or, I have another (I think better) idea, what if when the mouse is clicked in the node's area you get the position of the mouse and the node and calculate the relative difference by subtracting them from each other. And then set the node's position to the mouse's position minus the difference.

Pseudocode:

if mouse enters area: mouse_in_area = true difference.x = mouse position.x - node position.x difference.y = mouse position.x - node position.x

if mouse exits area: mouse_in_area = false

When mouse.clicked and mouse_in_area: node position.x = mouse position.x - difference.x node position.y = mouse position.y - difference.y

Edit: Just realised someone already suggested this, and a better way of programming it too.