[Solved] How to make ChartTrackballBehavior-Info always visible

[Michael]

Hi,

is it possible to make the ChartTrackball-Information (the line with the Labels) always visible? Of course it should be possible to change it's posiition, just like now.

I would also like to know why the PointerEntered event fires only with mouse. I have to make a "Hold" gesture with the finger to be able to change the position of the trackball. Can I chage this somehow?



Regards

Michael

[Tsvyatko]

Hello Micheal,

Currently, ChartTrackballBehavior does not support constant display. In order to enable such behavior one needs to create new behavior (deriving from ChartBehavior). However, we will consider extending the existing behavior to support such scenario.

Regarding, the issue with handling tap, it has been fixed in the Public Beta (2012.1.712). If you use version prior to this, I can encourage you download the latest version available from Your Account Download section.

Regards,
Tsvyatko
the Telerik team

[Michael]

Hello Tsvyatko,







i'm using the 2012.1.712 Version and the PointerEntered Event doesn't fire when i'm using my fingers(it does with the mouse though...)



I've created a custom Behaviour inherited from ChartTrackballBehavior. I have overriden this method just like that:

 

protected override void OnPointerEntered(Windows.UI.Xaml.Input.PointerRoutedEventArgs args)

{

base.OnPointerEntered(args);

}







When i'm using fingers, the OnPointerEntered doesn't get called...



It does work if I hold my finger for some time(Hold gesture) but I would prefer that it works just like the mouse. Is it possible?



Also, when i'm moving the finger, only the OnManipulationDelta method is beeing called(and not the OnPointerMoved).



Regards,



Michael

[Tsvyatko]

Hi Michael,

You are quite correct (Please excuse us for the misunderstanding). Indeed the current behavior trigger trackball on Hold, rather than tap. this is done to distinct displaying trackball from panning and zooming the chart.

We are considering extending the way this behavior can be customized and we willtake in mind this scenario as well.

Greetings,
Tsvyatko
the Telerik team

[Alex]

Hello

I am interested to know, this functionality is added to this behavior in last version ?

[Alex]

I want to force chart that show  " ChartTrackball " always on the last point, without touching with mouse!

how I can Make it

regards

[Tsvyatko]

Hi Alexander,

Currently, there is no option to display Trackball in custom scenarios. Nevertheless, we have added in our plans to expose API where you can show and hide Тrackball and position it on a desired location.
Unfortunately, this change will make in the upcoming SP, rather than our next official release early next year.

Regards,
Tsvyatko
Telerik