I implemented the "Retrieving mouse clicks on the viewer" part of the tutorial just the same as it was and it is not working at all... it is not doing anything when I click my mouse...

Hi,

I have a Graph, Nodes and Edges that are concurrently modified.

Since the Graph is attached to a Viewer, GraphListeners is responsible of piping the events from the graph to the viewer.

Sometimes, when there are concurrent modification of the elements of the graph, I get the following exception:

java.util.NoSuchElementException
	at java.util.LinkedList.removeFirst(LinkedList.java:270)
	at java.util.LinkedList.remove(LinkedList.java:685)
	at org.graphstream.stream.SourceBase.manageEvents(SourceBase.java:872)
	at org.graphstream.stream.SourceBase.sendAttributeChangedEvent(SourceBase.java:810)
	at org.graphstream.util.GraphListeners.sendAttributeChangedEvent(GraphListeners.java:73)
	at org.graphstream.graph.implementations.AbstractEdge.attributeChanged(AbstractEdge.java:106)
	at org.graphstream.graph.implementations.AbstractElement.addAttribute(AbstractElement.java:544)
	at org.graphstream.graph.implementations.AbstractElement.setAttribute(AbstractElement.java:560)

I tried using Graphs.synchronizedGraph but it doesn't solve the problem, because this is not about concurrent modification of ONE element, but concurrent emission of events to theGraphListeners.

There seem to be no way to have this pipe behave correctly with concurrence. Is there something I am missing or is this a bug?

I just wanna check if this is the expected behaviour for sprites. I've tested with a few scenarios, sprites under the nodes (with different z-indexes), sprites over nodes, etc..and all had the same result, as you can see on the example video below. Video Link

I just want to make sure if its the correct behaviour or not, or maybe it can be a bug, i dont know. Is this correct? While clicking on the sprites, or moving the other nodes, they move to different locations other than follow the attached node?

A feature where positions of some nodes could be pinned so that they don't get moved by the layout algorithm would probably be quite useful. This feature is known as pinning in GraphViz. This arises in many graph visualization tasks (eg. artificial neural networks) where there are somehow 'special' nodes (eg. input and output) that should be easy to find in a graph visualization.

There seems to be a "freezing" feature in BarnesHutLayout, but freezing nodes doesn't seem to do anything and all the implemented layout algorithms in both gs-core and gs-algo seem to ignore it. If this functionality can be implemented in the current system, then this is probably a documentation bug.

Error:

WARNING: Error while parsing style sheet for graph 'GraphicGraph_3863'. java.io.IOException: Encountered " "myStyle "" at line 1, column 1. Was expecting one of: "graph" ... "edge" ... "node" ... "sprite" ... ...

Css file:

node { size: 3px; fill-color: #777; text-mode: hidden; z-index: 0; }

edge { shape: line; fill-color: #222; arrow-size: 3px, 2px; }

1. I create a graph embedded in my netbeans-top-component as follows:

   Graph gsGraph = new MultiGraph("Nodeviewgraph"); gsGraph.addAttribute("ui.stylesheet", "graph { fill-color: red; }"); Viewer viewer = new Viewer(gsGraph, Viewer.ThreadingModel.GRAPH_IN_SWING_THREAD); viewer.enableAutoLayout();

   View view = viewer.addDefaultView(false); this.add(view, BorderLayout.CENTER); view.doLayout();

2. When the user clicks a certain button on the UI, the graph should be cleared and the background color should change. This is the code from the corresponding swing-action-listener:

   gsGraph.clear(); gsGraph.addAttribute("ui.stylesheet", "graph { fill-color: blue; }");

The graph indeed gets cleared, but the color changes to "white" (default) and not to "blue". Am I doing something wrong?

regards R4DIUM

Hello

I'm trying to get the "freeplane" style working, but actually had no luck. The graph seems crippled and the code generates continuous "Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException". I get the same problem if I use "edge { shape: cubic-curve; }" as CSS. So I guess I'm doing something wrong in the "curvy edge" area.

However, if I use a different style, the same code works.

        public static void main(String[] args) {
        System.setProperty("org.graphstream.ui.renderer",
                "org.graphstream.ui.j2dviewer.J2DGraphRenderer");
        Graph graph = new MultiGraph("Tutorial 1");

        graph.setAttribute(
                "ui.stylesheet",
                "node { shape: freeplane; fill-color: white; stroke-mode: plain; size-mode: fit; } edge { shape: freeplane; }");

        graph.addNode("Mind");
        graph.addNode("one");
        graph.addNode("two");
        graph.addNode("three");
        graph.addNode("four");
        graph.addEdge("EdgeMindone", "Mind", "one");
        graph.addEdge("EdgeMindtwo", "Mind", "two");
        graph.addEdge("EdgeMindthree", "Mind", "three");
        graph.addEdge("EdgeMindfour", "Mind", "four");

        graph.display();

    }

Hi everyone, firstly: nice job with this library!! However, with the next code i have one problem (using 1.1 libraries):

Node n = g.getNode(nodeLabel); n.addAttribute("ui.style" , ("size: 10px, 10px; fill-color: #3d5689; shape: rounded-box; stroke-mode: plain; stroke-color: yellow;"); n.setAttribute("label",nodeLabel);

With the above code, nodes perform the change of size and fill-color well, but not shape, stroke-mode and stroke-color. In edges does not work shape forms.

Edge e = g.getEdge(from+to); e.addAttribute("ui.style" , "cubic-curve;");

Any suggestion? Best regards !

Hello,

i'm trying to use GS in my project witch is managed by Maven. I looked the documentation ( http://graphstream-project.org/doc/Tutorials/Create-a-gs-based-Eclipse-project-using-Maven_1.0/ ) . But Maven doesn't resolve dependency cause your libs aren't in the maven central repository. Perhaps the libraries are shared on another (your own ?) Maven repository. Do you have any Maven PluginRepository URL that contains graphstream libraries ?

Thank you, Philippe

Hi, I see that older versions of the library were published on Maven Central. I'd like to integrate graphstream with a scientific simulator for pervasive computing, but I need to depend on libraries published on Central, as the simulator is hosted (also) there.

Any chance for the release 2.0.0 to be made available there?

Thanks

The new version (2.x branch) of HTTPSource depends on many external libraries (Spark, apache.commons, apache.httpcomponent) that add up to the payload of the gs-core jar file when building a dependency-included archive.

The archive with those deps is around 3.4 MB while it stays below 1MB without those deps.

Should we pull HTTPSource from gs-core and put it in its own project (gs-httpsource) ?

cc: @MaSven cc: @gsavin

When using getPathWeight(), the attributes are of type long when calculating the sum, so it makes it impossible to get a total path weight with Floats.

"class java.lang.Float cannot be cast to class java.lang.Double"

Where the value of x,y is calculated when autoLayout = true? I need to create a level attribute, which forces the value of y, but I want to keep the x calculated by autoLayout.

I thought about changing at the point that the x,y position is calculated automatically. It would read an attribute and change the value of Y setting to value of attribute. Am I right?

Where can I change the code? I using gs-ui-android and gs-core

Hey,

we use graphstream in our software MZmine (JavaFX) and really like the library, thanks for the hard work on it.

Auto-layout uses naps in the LayoutRunner to show the optimization to the user. We would like to run the layout calculation on a separate thread and without the visual optimization of the layout.

1. do you have an example of how to do this? (calculating the layout in the background and then flushing it onto the viever
2. any other tips for performance on huge networks?

Best regards Robin

Hi everyone, nice job with this library!! However, I have a problem with the library

I want to write a program that counts the number of intersections between the nodes that are represented as a square with a specified size. The main Problem is that, the nodes will be visualized as squares but if the coordinates of these nodes are just points x,y and here is exactly my Problem, because I want to check the intersections with the edges with the x,y coordinates but I can not do this properly!
because in some cases the corner of the square or its edges intersect with the edges but the original point that represents the square or the node in graphstream does not, I tried all the possible solutions with collinear points , slopes and everything but nothing worked for me, the question is, is there anyway in Grpahstream so that I can find out the coordinates of the edges or the corners of the square so that I can check with the line segment equation if they intersect ?

I mean something like that as shown in the picture

Best regards !

Hi all, is there any way to have a listener for right-mouse-click? ViewerListener only has mouse over and mouse pushed, I am not sure how to have a listener for right-click. Thanks.