Determining location for new table in Seating Chart

GoJS
1

Hi,

I’m hacking the Seating Chart sample you have on your website and it’s going pretty well.

I have built a UI that allows the user to add a new table and this works fine. My only problem is determining a location on the main diagram to add the table at. I want it to be added at a location that doesn’t overlap with existing tables, so I presume some sort of collision detection is required.

Is there any built in functionality that can allow me to do this?

Many thanks,
John

2

Try calling Diagram | GoJS API.

Of course you will need to decide where to look.

3

Hi Walter,

Thanks for your response. I think you mean that I should try guessing a location and using that method to see if it’s already used?

Do you have any suggestions on a strategy for guessing the first location, and subsequent location(s) should it already be occupied?

Thanks

4

Yes, you have to try and guess, or develop an algorithm to find the nearest suitable space that you would find adequate. There’s nothing built in to GoJS that does this.

A very simplistic approach would be to call findObjectsIn with a desired space, go through them all and find the largest value of node.actualBounds.right + 1, then try again using that value as the new x coordinate.

5

Thanks, this worked for me. Appreciate the help!