Tooltip of annotation doesn't working and tooltip of series is overlaid by Annotation

Question

Hi, I'm trying to create annotation from C# but the tooltip of this annotation cannot work.

And one more thing is that my series is overlaid by this annotation

TextAnnotation textAnnotation = new TextAnnotation()

{

Text = "Buy",

FontSize = 12,

HorizontalAlignment = HorizontalAlignment.Center,

VerticalAlignment = VerticalAlignment.Top,

X1 = X1,

Y1 = Y1,

Foreground = color,

ShowToolTip = true,

ToolTipContent = new TextBlock()

{

Text = tooltip,

Foreground = color

}

};

Durgadevi Selvaraj · Answer

Hi Hung, 
 
Thanks for contacting Syncfusion Support. 
 
Query 1: tooltip of this annotation cannot work. 
We have analyzed the reported problem based on the provided code snippet and by default there is no content for tooltip and to display content inside tooltip you need to set TooltipContent as string for annotation as like in below code, 
 
Code Snippet[C#] 
 




TextAnnotation textAnnotation = new TextAnnotation() 
{ 
                Text = "Buy", 
                FontSize = 12, 
                HorizontalAlignment = HorizontalAlignment.Center, 
                VerticalAlignment = VerticalAlignment.Top, 
                X1 = 4, 
                Y1 = 860, 
                Foreground = new SolidColorBrush(Colors.Red), 
                ShowToolTip = true, 
                ToolTipContent = "This is TextAnnotation", 
     }; 
            chart.Annotations.Add(textAnnotation); 
 
Please find the output screenshot, 
  
 
You can refer our UG documentation link to know more about tooltip in chart Annotations, 
Link: https://help.syncfusion.com/wpf/sfchart/annotations#tooltip 
 
 
Query 2: my series is overlaid by this annotation 
 
We have already identified this problem in our Chart and this will be resolved in our upcoming Vol 1, 2018 release. 

Also, we have prepared a workaround solution for this requirement by changing the order of tooltip canvas explicitly using custom chart class as shown in the below code, 
 
Code Snippet[SfChartExt.cs] 
 




public class SfChartExt : SfChart 
{ 
        private Canvas adorningCanvas; 
        public override void OnApplyTemplate() 
        { 
            adorningCanvas = GetTemplateChild("adorningCanvas") as Canvas; 
            base.OnApplyTemplate(); 
            Canvas.SetZIndex(adorningCanvas, 1); 
        } 
} 
 
Please find the output screenshot, 
  
We have prepared a sample based on above requirements and it can be downloaded from the below link, 
Sample :SfChart_Sample 
 
Please let us know if you have any concerns. 
 
Regards,  
Durgadevi S

Hung Nguyen · Answer

Thanks for your answer.For Query 1:I Think it's not because of tool tip content. I already set tool tip content, but it cannot be shown. I think the problem is the overlay problem that I cannot hover these annotation, that's why it will not show tool tip

Durgadevi Selvaraj · Answer

Hi Hung, 
Thanks for the update. 
  
Please let us know if you required any further assistance on this. 
  
Regards, 
Durgadevi S

Mita · Answer

Hello Hung,I am having the same problem with the annotation tooltip not appearing.  I tried the solution from this thread, but no luck.  Did you end up getting it to work?-Mita

Muneesh Kumar G · Answer

Hi Mita, 
 
Greetings from Syncfusion, we have analyzed your query and we would like to inform you that the overlaid problem resolved in our 2018 Vol 1 (16.1.0.24) release itself. Now the annotation tootip shown fine with mentioned TooTipContent as per the below code snippet. Here we don’t need the workaround solution for annotation tooltip.  
 
Code snippet [C#]: 




TextAnnotation textAnnotation = new TextAnnotation() 
            { 
                Text = "Buy", 
                FontSize = 12, 
                HorizontalAlignment = HorizontalAlignment.Center, 
                VerticalAlignment = VerticalAlignment.Top, 
                X1 = 4, 
                Y1 = 850, 
                Foreground = new SolidColorBrush(Colors.Red), 
                ShowToolTip = true, 
                ToolTipContent = "This is TextAnnotation", 
                ToolTipPlacement = ToolTipLabelPlacement.Top, 
            }; 
            TextAnnotation textAnnotation1 = new TextAnnotation() 
            { 
                Text = "Buy", 
                FontSize = 12, 
                HorizontalAlignment = HorizontalAlignment.Center, 
                VerticalAlignment = VerticalAlignment.Top, 
                X1 = 5, 
                Y1 = 850, 
                Foreground = new SolidColorBrush(Colors.Red), 
                ShowToolTip = true, 
                ToolTipContent = "This is TextAnnotation", 
                ToolTipPlacement = ToolTipLabelPlacement.Top, 
            }; 
            chart.Annotations.Add(textAnnotation); 
            chart.Annotations.Add(textAnnotation1); 
 
Make sure you have set ShowToolTip as true in annotation, please find the sample from the following location.  
 
Sample: http://www.syncfusion.com/downloads/support/forum/135260/ze/Tooltip_Annotation2106841491.zip 
 
Output:  
  
 
Please let us know if you are still facing any issue in this. 
 
Thanks, 
Muneesh Kumar G.