[Solved] Scrolling

[Paul Lewis]

Hi,

Im having issues trying to get the scrolling working on my chart. 

What Im trying to achieve:

I would like 10 points in view at a time

What Im getting:

I can make the scrollbar appear but it doesnt do anything

Background:

I am binding to the chart and grouping on a company code

my code:
Commented out sections are things i have tried after looking at the help

private void Charting()
 {
     RankChart.ItemsSource = null;

     RankChart.DefaultView.ChartArea.ZoomScrollSettingsX.ScrollMode = ScrollMode.ScrollOnly;
     RankChart.DefaultView.ChartArea.ZoomScrollSettingsX.MinZoomRange = 0.001;
     //RankChart.DefaultView.ChartArea.ZoomScrollSettingsX.RangeStart = 0.4;
     //RankChart.DefaultView.ChartArea.ZoomScrollSettingsX.RangeEnd = 1;
     //RankChart.DefaultView.ChartArea.ZoomScrollSettingsX.SetSelectionRange(0.4, 1);
     RankChart.DefaultView.ChartArea.AxisX.StepLabelLevelCount = 1;

     RankChart.SeriesMappings.Clear();
     RankChart.DefaultView.ChartArea.AxisX.LabelRotationAngle = 90;
     RankChart.DefaultView.ChartArea.AdditionalYAxes.Clear();
     RankChart.DefaultView.ChartArea.AdditionalYAxes.Add(new AxisY());
     RankChart.DefaultView.ChartArea.AdditionalYAxes[0].AxisName = "Secondary";
     RankChart.DefaultView.ChartArea.AdditionalYAxes[0].DefaultLabelFormat = "#VAL{p2}";
     RankChart.DefaultView.ChartArea.AxisX.AutoRange = false;

     RankChart.DefaultView.ChartArea.EnableAnimations = false;
     RankChart.SamplingSettings.SamplingFunction = ChartSamplingFunction.First;
     ScatterSeriesDefinition def2 = new ScatterSeriesDefinition();
     def2.AxisName = "Secondary";
     def2.LegendDisplayMode = LegendDisplayMode.None;
     def2.ItemLabelFormat = "#VAL{p}";
     def2.ItemToolTipFormat = "#VAL{p}";
     def2.ShowItemLabels = true;
     this.AddSeries(def2, "GrowthPCT");

     BarSeriesDefinition def1 = new BarSeriesDefinition();
     def1.InteractivitySettings.HoverScope = InteractivityScope.Item;
     def1.ShowItemLabels = false;
     def1.ShowItemToolTips = true;
     def1.ItemToolTipFormat = "Sales: #VAL{C4}";

     this.AddSeries(def1, "YTDSales");
     RankChart.DefaultView.ChartLegendPosition = Telerik.Windows.Controls.Dock.Bottom;

     RankChart.ItemsSource = this.DataContext;
 }

 private void AddSeries(ISeriesDefinition definition, string fieldName)
 {
     SeriesMapping s = new SeriesMapping();
     s.SeriesDefinition = definition;
     s.GroupingSettings.GroupDescriptors.Add(new ChartGroupDescriptor("Code"));

     s.ItemMappings.Add(new ItemMapping("Code", DataPointMember.XCategory));
     s.ItemMappings.Add(new ItemMapping(fieldName, DataPointMember.YValue));

     RankChart.SeriesMappings.Add(s);
 }

any suggestions?

[Evgeni "Zammy" Petrov]

Hi Paul,

Thank you for contacting us.

Currently we do not support this scenario (Grouping/Aggregation with Scrolling/ Zooming). We are working hard on changing this but we cannot commit to any date at the moment.

Here is a link to a similar problem:
http://www.telerik.com/community/forums/silverlight/chart/no-scrolling-when-grouping-is-used.aspx

Ves has attached a project where he uses a ScrollViewer to simulate scrolling. I hope this work-around can help you out. Get back to us if we can do anything else for you.

Kind regards,
Evgeni "Zammy" Petrov
the Telerik team

[mike]

Any news on this issue of not having zooming/scrolling with Grouping?

[Giuseppe]

Hi mike,

Our developers investigated possible solutions for this missing feature thoroughly but unfortunately it turned out that the current implementation of the zooming / scrolling functionality cannot accommodate such grouped data scenario due to the specific way the charting data engine handles the grouped data.

For the time being we cannot commit a timeframe for the availablity of such feature in the future as it would require significant changes to the design / architecture of the control.


All the best,
Giuseppe
the Telerik team