RadLinearSparkline & Timebar + annotations?

[Michele]

Hello,
I was having detail iussue on large adta with timebar & radchart... using RadLinearSparkLines I achieve a better deep detail.
I wish to know if it's possible to add 2 horizontal lines for a limit and a warning as I was doing with annotations in radchart.


Thanks

[Petar Kirov]

Hi Paolo,

The RadSparkline does not support annotations like the RadChart or RadCharView do. However you can use its NormalRange feature - a horizontal stripe defined by the  NormalRangeTop and NormalRangeBottom properties. 

In order to have multiple horizontal lines, you can place multiple sparklines behind the one you want to annotate. Note that you will need to manually set its range, in order to sync the ranges of the sparklines. Here is an example:  

<telerik:RadLinearSparkline x:Name="sparkline1"
                   XValuePath="X" YValuePath="Y"
                   Panel.ZIndex="1"

                   AutoRange="False"
                   MinXValue="0"
                   MaxXValue="10"

                   MinYValue="0"
                   MaxYValue="100"/>

<telerik:RadLinearSparkline x:Name="refSparkLine"
                   XValuePath="X" YValuePath="Y"
                   Panel.ZIndex="0"

                   AutoRange="False"
              MinXValue="{Binding ElementName=sparkline1, Path=MinXValue}"
              MaxXValue="{Binding ElementName=sparkline1, Path=MaxXValue}"

              MinYValue="{Binding ElementName=sparkline1, Path=MinYValue}"
              MaxYValue="{Binding ElementName=sparkline1, Path=MaxYValue}"

                 ShowNormalRange="True"
                NormalRangeFill="Blue" NormalRangeTop="30"                                        NormalRangeBottom="29"/>

Another thing you will need to do is to set a fake ItemSource to the reference Sparklines. This is needed because if the sparkline does not contain any items, it will not display its NormalRange stripe:

this.refSparkLine.ItemsSource = new List<PlotInfo>()
{
    new PlotInfo { X = -2000, Y = -5000 },
};

I hope this helps.

Greetings,
Petar Kirov
the Telerik team

[Michele]

Hello,
when I try to put 2 RadLinearSparkline inside a RadTimeBar I got an error saying content is just defined...what control should I wrap in it? StackPanel? Grid?
Thanks

[Petar Kirov]

Hi Paolo,

RadTimeBar inherits from ContentControl, so you need to provide it with a single element.  You can place all the Sparklines in a grid and place the grid itself in RadTimeBar.
 
Best regards,
Petar Kirov
the Telerik team

[Henry]

Hi Petar -- I too would really like to see Annotation for the RadTimeBar.  Is this something that will be available in the future?  You show a demo above, however, are there any other ways to achieve better annotation for a RadTimeBar?
Thanks,
HH

[Martin Ivanov]

Hi Henry,

At this moment we don't have plans to introduce annotations for the RadTimeBar. If you need one you can use the approach described by Petar.

Regards,
Martin
Telerik