Hello,

I was wondering if there was anyways to reset or create a new random number generator for the entire diagram, it seems that you can set the seed for the diagram layout algorithms but there doesn't appear to be anyways of creating a new random generator, effectively setting the random sequence generated back to its initial state?

One way around it I could think off was to recreate the layout algorithms each time i refresh the diagram, which would hopefully create a new random generator for each layout? is this right?

I guess the problem is, does the diagram as a whole have a single random generator or are they embeded within each layout class, and if they are embeded within each layout class how can I get access to them?

regards

well thats not entirely true,

I am setting the random seed because I want the same layout for the nodes each time i generate the diagram,

What I actually get is a random layout each time, even though randomize is set to false on the anneal and the random seed is set to 1 for the flow layout.

Does the random generator internal to the layout classes get recreated with the seed each time arrange is called? or just once for the entire lifetime of that object?

I've created my layout algorithms objects up front during programme initialisation, and set the random seed to 1, then I use those layout objects each time arrange is called.

I do not do:

Layout layoutObj =  new FlowLayout();

each time I want to arrange my diagram. but I do reset the seed each time to 1, Is there anyway of creating a new random generator inside the layout algorithms each time I want to arrange, therefor making sure that each time before I call arrange I know I will be getting the exact same number sequence generated?

Or should I just new the layout algorithm each time, although this means that because I cannot serialise the layout algorithm objects I cannot save the layout settings and they will have to be reset each time I want to call arrange.

What do you think is the best approach?

regards

no,

There is a random seed, but what I am more interested in is how that seed is being applied inside the layout classes.

Each time I call Arrange I get a completly different layout. Setting the random seed does not fix this. I only ever create 1 layout object when my application starts, rather than each time I want to arrange.

Is the RandomNumberGenerator being created each time the Arrange function is called, or is it being created Once when I create the Layout object when my application starts?

Is it possible to reset the random number generator inside each layout class?

I can't see any random numbers used in the FlowLayout code; perhaps RandomSeed was used in older versions, but no more. I suppose the layout object does not clear its state correctly on next runs. What happens if you set RecreateGraph = true? Are you using the WPF or Windows Forms control?

Stoyan

sorry about that this link:

http://www.mindfusion.eu/onlinehelp/flowchartnet/T_MindFusion_Diagramming_Layout...

I also get this problem when using any of the layout classes not just flow,

Is it because Im using the layout classes that exist for the lifetime of my application rather than the single instance of wanting the arrange the diagram?

so what your saying is, that if Im placing my nodes in a different initial position each time I reload the layout algorithms will produce different result?

That might be the bug..