I am evaluating MidFusion for a possible purchase for my requirement.

I have been playing around with layouts and one interesting thing i noticed.

When i have high number of connections than the number of shapes (e.g. 200 Shapes, 450 Connections), Grid Layout causes a machine crash. I checked in the Memory allocation, and when i start Grid layouting, it starts allocating memory. From 414 M it went upto 1.47 GB. I had to terminate the process manually and the Grid layout never finished.

Other layouts also took up a lot of time ... some upto 7 mins, and then came up with a solution.

On Progress function on all layouts, go to 0 from 100 and repeat this cycle for 10 - 12 times.

Has this bugs been known and a solution available in the next release?

I would be using the layouts feature a lot and i need a robust solution.

Otherwise your component is OK.

Cheers

Phil Jacques

Hello Stoyan,

Well ... my machine is 1 Gig RAM with a huge PageFile. I understand this is good enough for any component.

I see a random memorz allocation in the Memory, when the Grid Layout is invoked.

how do i set a time limit to the Grid Layout?
Also you said the Tree Lazout is the fastest because it has a root node set, so if that is the case can i set the root node in other layouts, since i know the root node.

Tree lazout does not work for my requirement, i would be mostly using Spring and Grid Layouts.

I would be working with 600 - 1200 Shapes and 800 - 1600 Connections ... Min max values. I am also not sure about the zoom as i am finding some problems in it. Will do some more R & D and post if i find anzthing related to that.

If you can suggest me ways of reducing the time taken for Grid layout, it would be wonderful. I waited for 2 hrs, but the Grid layout still did not appear. 

Cheers

Phil

Hi there,

The grid layout produces better results if it starts from the longest graph path as a diagonal in the grid. Now it seems that looking for that path is not such a good idea when there are more than 30-40 edges in the graph

This updated dll adds an UseLongestPath property to GridLayout. Set UseLongestPath = false and the layout will run faster.

https://mindfusion.org/_beta/gridlt.zip

g.

Update :
For a diagram with 500 boxes and 750 connections, the Grid layout took 7 mins from what was infinite.

So thats really good. bu i still want it to be faster.

Any more suggestions??

Cheers

Phil.

Heyy Glavcho,

I played around with the Grid Layout a bit. I tried reducing the interations from 3000 to 50 and increasing the grid size.

It did speed up the algo.

But i think there are 2 parts here. The above actions speeds up the computation part, but the control still hangs till the diagram is displayed. Sometimes it is like waiting for more than 2 mins (Reading from System.Diagnostics.Stopwatch) after the computation has become 100% and before the diagram is displayed on the control.

Maybe something in the Painting routine makes it wait for such a long time.

Best part is that the layout works with 1000 shapes and 2000 connections. So not bad

Cheers

Phil

Oh ... that would be great.

hopefully there would not be a need of progress counting on Progress counters ... 

Cheers

Phil