topic Re: Module Development : Simple Way to Disable Snap to Grid in FlexSim Forum

Module Development : Simple Way to Disable Snap to Grid

jstevensE9YZD — Thu, 29 May 2025 05:28:59 GMT

Hey,

Is there an easy way to prevent an object from snapping to the grid in C++? Would it be done in onDrag()?

How the conveyor doesn't snap to the grid is what I'm looking for.

Thanks,

Re: Module Development : Simple Way to Disable Snap to Grid

joerg_vogel_HsH — Thu, 29 May 2025 06:11:46 GMT

If you set a location by script, such an object does not snap to the grid. Only objects you drag into your model are snapping to the grid. Or objects that you move by mouse snaps to the grid. Currently I have not FlexSim opened to look into the tree to find the node myself. It should be an attribute (node) of a view tree of the window you drag objects onto. It is mentioned for example in manual for custom graphical user interface (GUI). You find it in the view tree of FlexSim in active branch.

Re: Module Development : Simple Way to Disable Snap to Grid

jstevensE9YZD — Thu, 29 May 2025 13:52:54 GMT

@joerg_vogel_HsH

The reason I mentioned onDrag() was that I want to drag a specific object around a view and not have it snap to the grid. I don't want to turn off snap to grid for the rest of the objects.

Re: Module Development : Simple Way to Disable Snap to Grid

Matthew_Gillespie — Fri, 30 May 2025 12:47:40 GMT

Yeah, the conveyor objects override onDrag() and return 1 so it doesn't do the normal behavior. Basically you'd add an onDrag() like this to your object:

if (!draginfo(DRAG_INFO_BUTTON_STATE)) // mouse wheel return 0; // let view zoom Vec3 diff(draginfo(DRAG_INFO_DX), draginfo(DRAG_INFO_DY), draginfo(DRAG_INFO_DZ)); b_spatialx += diff.x; b_spatialy += diff.y; b_spatialz += diff.z; return 1;

Re: Module Development : Simple Way to Disable Snap to Grid

jstevensE9YZD — Fri, 30 May 2025 13:05:03 GMT

Thanks @Matthew_Gillespie !

That was exactly what I was looking for, glad it was so simple.