Enable Node selection in Preview Applet

[ckapop]

Is there a tutorial or complete example in existence on how to do this?

I am struggling on how to get a PreviewMouseListener along with the needed Renderer working/used by my PreviewController.

[lapanoid]

I am strugling to make gephi PApplet sensible to mouse events. I made MyRenderer and MyPreviewMouseListener but still no reaction on mouse.
If somebody managed with that, please help me!
My code is hosted here https://github.com/lapanoid/GephiVisApp, any comments would be highly appreciated.

[veraptor]

I have successfully plugged the mouse listener into the preview applet. The trick was to register the MouseResponsiveRenderer as one of the ManagedRenderers on the PreviewModel.

Code: Select all

        ManagedRenderer [] mr = previewModel.getManagedRenderers();
        ManagedRenderer [] mr2 = Arrays.copyOf(mr, mr.length+1);
        mr2[mr.length] = new ManagedRenderer(new MyPreviewMouseResponsiveRenderer(), true);
        previewModel.setManagedRenderers(mr2);
        previewController.refreshPreview();

Next, when I tried to figure out which node should be selected based on its coordinates, I found that there was a bug: the Y position in the event was negative with respect to the actual node position. Surprisingly, a simple sign reversal (marked in bold below) was enough to fix the problem.

Code: Select all

public class MyPreviewMouseListener implements PreviewMouseListener{
        @Override
        public void mouseClicked(PreviewMouseEvent event, PreviewProperties properties, Workspace workspace) {
                System.out.println("I'm clicked!!: x:" + event.x + ", y:" + event.y);     
                float x = event.x;
                [b]float y = -event.y;[/b]
  
                float minDist = Float.MAX_VALUE;
                Node nnNode = null;
                for (Node n : Lookup.getDefault().lookup(GraphController.class).getModel().getGraph.getNodes()) {
                    float sqdist = (n.getNodeData().x()-x)*(n.getNodeData().x()-x);
                    sqdist+=  (n.getNodeData().y()- y)*(n.getNodeData().y()- y);
                    sqdist = (float)Math.sqrt(sqdist);
                   if(sqdist<minDist){
                       nnNode = n;
                       minDist = sqdist;
                       break;
                   }
                }
                  
                System.err.println("Nearest node: " + nnNode.getNodeData().getId()+ ", "+ nnNode.getNodeData().getLabel()+" minDist " + minDist);
                properties.putValue("display-label.node.id", nnNode.getNodeData().getId());
   }
}

[imenMegd]

Hi,

Does not work for me , can you join your code please.
Thank you !

[ph0123]

hi,
how to add mouse listener in "template.zip" in to project layout with gephi toolkit?
tks so much!

[girlss]

hello ,
I ran the tutorial provided in the forum, but I could not solve the problem. I have defined a PreviewMouseListener and a RendererMouseListener and added the latter to render the applet that contains the graph.
The execution result is an error message, as defined in preprocess method.
So how do I aggiundere the mouse listener having taken as a reference the "template.zip" layout for the project with the Gephi toolkit?
thank you!

[eduramiba]

Hi,
Just by using the ServiceProvider annotation, the renderer should be automatically added to gephi runtime.
Though you probably need to build a jar dist file before running it.

Can you provide the error you get?
And the code you use?

Eduardo

[girlss]

Hi,
I have written a class MyPreviewMouseListener:

Code: Select all

import org.gephi.preview.api.PreviewMouseEvent;
import org.gephi.preview.api.PreviewProperties;
import org.gephi.preview.spi.PreviewMouseListener;
import org.gephi.project.api.Workspace;
import org.openide.util.lookup.ServiceProvider;

@ServiceProvider(service = PreviewMouseListener.class)    
public class MyPreviewMouseListener implements PreviewMouseListener{
        @Override
        public void mouseClicked(PreviewMouseEvent event,
                        PreviewProperties properties, Workspace workspace) {
                System.out.println("I'm clicked!!: x:" + event.x + ", y:" + event.y);
        }
        @Override
        public void mousePressed(PreviewMouseEvent event,
                        PreviewProperties properties, Workspace workspace) {System.out.println("I'm pressed!!: x:" + event.x + ", y:" + event.y);}
        @Override
        public void mouseDragged(PreviewMouseEvent event,
                        PreviewProperties properties, Workspace workspace) {}
        @Override
        public void mouseReleased(PreviewMouseEvent event,
                        PreviewProperties properties, Workspace workspace) {}
}

I also written a class MyPreviewMouseResponsiveRenderer:

Code: Select all

import org.gephi.preview.api.Item;
import org.gephi.preview.api.PreviewModel;
import org.gephi.preview.api.PreviewProperties;
import org.gephi.preview.api.PreviewProperty;
import org.gephi.preview.api.RenderTarget;
import org.gephi.preview.spi.ItemBuilder;
import org.gephi.preview.spi.MouseResponsiveRenderer;
import org.gephi.preview.spi.PreviewMouseListener;
import org.gephi.preview.spi.Renderer;
import org.openide.util.lookup.ServiceProvider;

@ServiceProvider(service = Renderer.class)
public class MyPreviewMouseResponsiveRenderer implements MouseResponsiveRenderer, Renderer{

	@Override
	public boolean needsPreviewMouseListener(
			PreviewMouseListener previewMouseListener) {
		return previewMouseListener instanceof MyPreviewMouseListener;
	}

	public boolean needsItemBuilder(ItemBuilder itemBuilder, PreviewProperties properties) {
		return true;
	}

	public boolean isRendererForitem(Item item, PreviewProperties properties) {
		return false;
	}


	public void render(Item item, RenderTarget target, PreviewProperties properties) {
		System.err.println("render Called");
		
	}

	public void preProcess(PreviewModel previewModel) {
		System.err.println("preProcess Called");
	}

	public PreviewProperty[] getProperties() {
		return new PreviewProperty[0];
	}

	public String getDisplayName() {
		return "My renderer";
	}
}

I, finally, written a class in whitch I have added an object MyPreviewMouseResponsiveRenderer to the preview model:

Code: Select all

ManagedRenderer [] mr = previewModel.getManagedRenderers();
		ManagedRenderer [] mr2 = Arrays.copyOf(mr, mr.length+1);
		mr2[mr.length] = new ManagedRenderer(new MyPreviewMouseResponsiveRenderer(), true);
		previewModel.setManagedRenderers(mr2);

If I click on any area of the applet does not show the coordinates of the point, and on the console, it shows the message "preProcess called".

Probably the problem is the association of the MouseListener to the graph. How can I do that?

PS: Sorry for a delay in the response!


girlss
_______________________________

[eduramiba]

Hi,
Sorry for late response.

You are only seeing preProcess called message and not clicked message because Netbeans Platform applications ignore System.out for some reason.
So you should use System.err for debugging, or other kinds of output like a dialog.

I attach an updated, tested, template.zip file that shows a message when a node is clicked. It also marks the clicked node in the graph canvas until other node, or no node is clicked.
While doing these example, I noticed and remembered that Y axis coordinates are inverted in relation to node coordinates. Pay attention to this.

Eduardo

[DengpanXue]

Can anybody give me a main function,when I use these template's function,I don't known how to use these ,when I write a main function by myself,it doesn't work at all!Thanks a lot