Is Collision/Overlap Prevention Possible?

[milocaruso]

I am working on a project for creating storage tray layouts and need to not allow any of the rectangles to overlap. Is this something that can be done out of the box or do I need to "roll my own".

Thanx!

\M/ilo

[milocaruso]

Update on this. While I'd still like to know if there is already a built in way to handle this, I did figure out a way to do this. I dug into the source code to see what I can see and found the "Intersects" method of the Rectangle class. I took this code and made an extension method for the ModelNode class to detect overlaps:

public static bool Intersects(this NodeModel node, NodeModel targetNode) { var thisX = node.Position.X; var thisY = node.Position.Y; var thisW = node.Size.Width; var thisH = node.Size.Height; var rectX = targetNode.Position.X; var rectY = targetNode.Position.Y; var rectW = targetNode.Size.Width; var rectH = targetNode.Size.Height; return rectX < thisX + thisW && thisX < rectX + rectW && rectY < thisY + thisH && thisY < rectY + rectH; }

Then I extended the ModelNode class to keep track of it's original location so if an overlap was detected it would move back to where it was originally. I did run into an issue with this at first where it wasn't always working. Then I realized that if the node being moved was underneath a node, focus swapped to the overlapping node so the intersection check wasn't firing properly. In my case Z-Index is not important so I added a call to SendToFront to put the node to be moved to the front and thus maintain focus.

Again, this is working but if there is a better way I'd love to learn about it.