Unlike SISO block in Simulink, blocks that have a single inport and no outport (Scope, Display, To File, To Workspace) do not autoconnect if dragged over a line in a model. Placing a call to this function in the CopyFcn callback of any single-inport block will cause the block to automatically connect when the block is dropped over a line in a Simulink model. This is similar to the built-in behavior of SISO blocks (ie gain, unit delay, etc) in Simulink. These blocks, when dropped on a line, automatically connects the inport and outport. With this function, in this case of a single-inport block, the block is moved just below the line and the inport is automatically connected.
This can be made the default behavior for these blocks by creating a custom library containing the desired blocks and adding the call to this function in the CopyFcn callback of the library blocks.
Mike Anthony (2020). SinkAutoConnect (https://www.mathworks.com/matlabcentral/fileexchange/28656-sinkautoconnect), MATLAB Central File Exchange. Retrieved .
Updated to fix bugs, work in the MoveFcn callback, and work for sink blocks with multiple inports (like the XY Graph).
Bug fixes and equivalent capability for MoveFcn callback
Added Copyright comment in SinkAutoConnect.m
Removed instructions on how to alter the built-in Simulink library blocks.