Tear Down protocol

[Alejandro Clemotte]

In the tear down protocol of the Tobii Gaze SDK Developer’s Guide .NET API Specifics the first step is:

1. To tear down the active connection to the eye tracker, call the method tracker.Disconnect().

But in the sample of the TobiiGazeSdk-DotNetApi-2.0.3.182-Win32 this step is not done. Why? Is this a bug?

Sometimes (not always) this sample give me a error when I stop it. Can be this the problem?

[Alejandro Clemotte]

This is the error when I stop the sample:

An unhandled exception of type ‘System.InvalidOperationException’ occurred in System.Windows.Forms.dll

An the line is this:
private void GazePoint(object sender, GazePointEventArgs gazePointEventArgs)
{
BeginInvoke()); <–This line of code
}

[Robert [Tobii]]

Hi,

Thank you for reporting this bug. You are right, the tear-down in the WinFormsSample is not correct.

I added an OnClosing event handler to dispose the eye tracker and avoid the crash:

        protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
        {
            base.OnClosing(e);

            _eyeTrackingEngine.Dispose();
        }

[Author]

Posts