zooming and scrolling problem with multiple series

[Dmitry Dinamit]

Hi,

I noticed a very unpleasant behavior of RadChart when using zooming & scrolling with several SeriesMappings. If both series  have XValue binded to a DateTime field, and if there is a large gap in DateTime values, then when you scroll or zoom to that portion of the chart, "No Data Series" appears.

Take a look at example file zoomscrollupdated.zip located in  this thread , and modify the following piece of code  in order to see what's the problem. Just add a gap to the DateTime values:
from this:

            for (int i = 0; i < 100; i++)
            {
                data.Add(new MyZoomData(i, i*4, DateTime.Today.AddDays(i)));
            }

to this:

for (int i = 0; i < 800; i++)
            {
                if (i == 200)
                    i += 365;
                data.Add(new MyZoomData(i, i*4, DateTime.Today.AddDays(i)));
            }

Please, help.

Thanks

[Dmitry Dinamit]

Attached is the image of the chart in which this problem happens. I set SeriesDefinition to ScatterSeriesDefinition,  in ordet to distinct the regions with no data. As I wrote, if you try to zoom or scroll into this regions, chart dissapears and "No Data Series" message appears, and instead of this i'd like that my chart remain visible

[Ves]

Hi Dmitry,

I am afraid this is related to the way zoom/scroll is currently implemented. Our developers are already aware of this behavior and they will research the possibilities to fix it. For the time being, please set the ChartArea.ZoomScrollSettingsX.MinZoomRange with a number, that would not allow zooming too much (ex. a value of 0.1 would only allow zooming in to a range which is one tenth of the original X axis range).

Best regards,
Ves
the Telerik team

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[Aurélien Dubosson]

Hi Ves,

How long time do you think your developers can fix this problem ? Less than 2 months ?

Because I need to employ this particularity for a project, if it's too long are there alternatives to draw a chart and zooming in function of time ?

Thanks and best regards.

Cheers.

Aurélien

[Ves]

Hello Aurélien,

I am afraid there is no certain schedule for this. Our next major release (2010 Q2) is expected in mid-July and this change is not planned. So it is likely, though it is not for sure, that it is not implemented by then. Please, accept our apologies for the inconvenience caused.

Kind regards,
Ves
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Nadav]

Is There any update on this bug?

It's 2011 Q1 and the bug still exists...

Nadav

[Rahul]

I'm also having the same problem.

[Ves]

Hi,

I am sorry to say it - this has not been updated, so zooming in clustered data might not always yield best results.

Kind regards
Ves
the Telerik team

[Stumple]

This is hilarious.

We recently downloaded your product and are evaluating your charting package. We noticed the same thing happening when using a line series definition. If the user zooms into the chart and then scrolls to the part of the chart where data is not there the chart goes empty. What is even worse is the user is then unable to zoom back.

What I find funny is this issues occurs with many people and the initial posting was May of last year.

[Jussi]

Is this going to be fixed or should we consider changing the charting component? We really need the zoom slider to work properly even with clustered data. In our case there are large gaps with no data and then sporadically large amounts of data.

   - Jussi

[Ves]

Hi Jussi,

Our developers are already working on a more general solution to the issues and limitations, discussed here. This solution, however, will not be available in the next release -- Q2 2011. It can be expected later with Q3 2011.

Best regards,
Ves
the Telerik team

[Nate]

We are still experiencing this issue with Q3 2011. Has this been resolved? Or is there an updated timeline on this, as this issue has been open since 2010. 

Those that are following this thread is there an issue in the Tracker that we can up vote to get this resolved? If so what is the name?

Thank you for your time.

[Ves]

Hello,

Unfortunately, due to the complexity of the feature and given the current state of RadChart this has not been changed. However, our developers already implemented it in our new control -- RadChartView, you can check this help topic on adding ChartPanAndZoomBeahvior.


Kind regards,
Ves
the Telerik team