Line connections should only connect a block from a higher layer to a block from a lower layer. Any attempt to change the layout in a way that violates this (e.g. by dragging a block) should not affect the layout.
Also, the line preview should not appear during block dragging to suggest to the user that this type of edit would occur.
Line connections should only connect a block from a higher layer to a block from a lower layer. Any attempt to change the layout in a way that violates this (e.g. by dragging a block) should not affect the layout.
Also, the line preview should not appear during block dragging to suggest to the user that this type of edit would occur.