Re: Retrieving Mouse Clicks

[Stefan Balev <stefan.balev AT gmail.com>]

Hi,

You can put a Thread.sleep() call inside the loop. This will considerably reduce the CPU usage without a perceptible delay for the user.

Hope this helps,

--
Stefan

Le 28 mai 2013 23:44, "Sebastian Bock" <sebastian.bock AT bluewin.ch> a écrit :

Hi there

Just a question to the example from the graphstream site. In the following example a while(true)-loop is used and AFAIK the pump() method is non blocking. This results in a loop which causes a 100% CPU usage.

Is this a normal behavior? Are there any other ways to retrieve mouse clicks without 100% CPU usage?

Thank you in advance

Sebastian

Example:

public class Clicks implements ViewerListener {

    protected boolean loop = true;

 

    public static void main(String args[]) {

        new Clicks();

    }

    public Clicks() {

        // We do as usual to display a graph. This

        // connect the graph outputs to the viewer.

        // The viewer is a sink of the graph.

        Graph graph = new SingleGraph("Clicks");

        Viewer viewer = graph.display();

 

        // The default action when closing the view is to quit

        // the program.

        viewer.setCloseFramePolicy(Viewer.CloseFramePolicy.HIDE_ONLY);

 

        // We connect back the viewer to the graph,

        // the graph becomes a sink for the viewer.

        // We also install us as a viewer listener to

        // intercept the graphic events.

        ViewerPipe fromViewer = viewer.newViewerPipe();

        fromViewer.addViewerListener(this);

        fromViewer.addSink(graph);

 

        // Then we need a loop to wait for events.

        // In this loop we will need to call the

        // pump() method to copy back events that have

        // already occurred in the viewer thread inside

        // our thread.

 

        while(loop) {

            fromViewer.pump();

        }

    }

 

    

...