How to detect a tap on a column and then display some info about it

[Kieran Pierce]

Hi all,

I now have a chart working on IOS, Android and WP81, really liking the control so far. what I would like to be able to do is detect a user tapping on a column and then I want to display a tool tip style popup with some info on the column. My chart is a simple column series with a numeric Y axis. My chart is built in XMAL and data bound to a ModelView

Any help gratefully received,

Kieran

[Manivannan Elangovan]

Hi Kieran,

Thanks for using Syncfusion products.

We are able to achieve your requirement by workaround using ChartTrackballBehavior and CustomRenderer for Andriod and WP81. For iOS, instead of Custom Renderer we have used CustomDelegate.

We have prepared a sample based on your requirement. Please download from the following location

Sample: Tooltip

Regards,
Manivannan.E

[Kieran Pierce]

Thanks for this, having looked at it, will it not be possible to just use the trackball? can that be used on a column series? if so are there aany docs showing a simple trackball implementation in Xamarin fomrms again using XAML

[Manivannan Elangovan]

Hi Kieran,

The Trackball behavior is used to show information on the nearest datapoint position, when hold and moving on the chart. We have prepared a sample with the column series and trackball in the XAML. Please download the sample from the following location.

Sample: TrackBall

Currently, we are working on UG documentation and it will be published at mid of November. We will let you know once it is updated.

Regards,
Manivannan.E

[Kieran Pierce]

Manivannan,

thanks for the sample, I have tried it and i don't see a label, I may not understand what this should look like but was expecting a sort of label near where i tap?

could you help me out witch a screen shot of what I should see maybe using this sample?

Kieran

[Manivannan Elangovan]

Hi Kieran,

Label will be shown on datapoint position, when touch and hold on the column segment. We have attached screen shot for your reference.

Screenshot: Screenshot

 
Regards,
Manivannan.E

[Kieran Pierce]

Thanks, I can see it working now, thanks

[Manivannan Elangovan]

Hi Kieran,

Thanks for the update. Please let us know if you have any query.

Regards,
Manivannan.E