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ContextMenu on a chart series

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Adam
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Adam asked on 04 Mar 2021, 05:55 PM

Hi 

I would like to bring up a ContextMenu component for a Chart OnSeriesClick event so e.g. the user can click on a chart series and be presented with options.  I am able to do this by e.g. having a OnSeriesClick handler method that invokes ContextMenu.ShowAsync to show the ContextMenu - the problem is that ShowAsync requires the X/Y coordinates from the mouse click and the OnSeriesClickEventArgs class does not provide mouse coordinates so i cannot show the context menu in the right place.

Any ideas how this could be accomplished?

Thanks

Adam

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Stamo Gochev
Telerik team
answered on 05 Mar 2021, 05:20 AM

Hi,

The built-in functionality of the ContextMenu can be used with the Chart directly by setting the "Selector" property:

<TelerikChart Class="chart-selector" ...>
</TelerikChart>

<TelerikContextMenu Selector=".chart-selector" ...>
</TelerikContextMenu>

This will show the context menu without a need for managing its position manually (note it doesn't expose settings for configuring the position).

On the other hand, if you need to display a popup menu with a click on the series, this can be achieved by wrapping the chart in an HTML element and handling "onclick" (or even "oncontextmenu") events:

<div @onclick="@OnClick" @oncontextmenu="@OnContextMenu">
    <TelerikChart ...>
    </TelerikChart>
</div>

and use the position that is exposed in the "MouseEventArgs":

    public void OnClick(MouseEventArgs args)
    {
        Console.WriteLine(args.ClientX);
    }

    public void OnContextMenu(MouseEventArgs args)
    {
        Console.WriteLine(args.ClientX);
    }

to get the coordinates and display information in a customized context menu.

Regards,
Stamo Gochev
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Adam
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answered on 08 Mar 2021, 01:22 PM
Thanks Stamo, this has helped.
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