Manually turn on tooltip in TKChart

[Bryce]

Hi, I have a chart inside a Scrollview that wasn't scrolling. Based on this thread https://www.telerik.com/forums/tkchart-in-a-uiscrollview-can't-scroll I decided to look into a gesturerecognizer. However, the example shows how to select a point. What I would like is to turn on a tooltip. I have the behavior turned on but can't seem to manually turn on the tooltip itself. The tooltip works fine if I allow the LongPressGesture to resolve normally so that is not the issue. I just need to manually turn it on it seems.

This code seems to select the point, assuming I set the selection mode properly.

private void HandleTap(UITapGestureRecognizer tap)
{
    var touchPoint = tap.LocationInView(Control.PlotView);  // Control is TKChart
    var hitTestInfo = Control.HitTestForPoint(touchPoint);
    Control.Select(hitTestInfo);
}

 

How can I turn on the tooltip for that point as if they'd tapped it?

Thank you,

Bryce

 

[Tsvyatko]

Hi Bryce,

Thank you for contacting us! In order to manually show the tool tip you would require the following:

 - setup the trackball behavior to RadCartesianChart. Ii will simplify the tooltip content setup:

<telerikChart:RadCartesianChart.Behaviors>

    <telerikChart:ChartTrackBallBehavior ShowTrackInfo="true" ShowIntersectionPoints="true"  />
</telerikChart:RadCartesianChart.Behaviors>

 - add the following code in the tap recognizer:

public void OnTap(UITapGestureRecognizer recognizer)
{
     var touchPoint = recognizer.LocationInView(Control.PlotView);  // Control is TKChart
     this.Control.Trackball.ShowAtPoint(touchPoint);
}

Let me know if this helps. 

Regards,
Tsvyatko
Progress Telerik