Ticket T295873

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Chart Data Source does not update after loading a workspace

Roni Hoffman

created 9 years ago

Hello,

I have a ChartControl inside a LayoutPanel inside a DockLayoutManager.

Everything works fine, ie the chart data source is correctly bound and displays data, if I don't restore a work space. As soon as I restore a workspace from a file the chart does not display any data. The data source which is an observable collection of series points, contains data, but the diagram.series.points collection never updates and is always empty. How can I fix this? Thank you.

here is my chart

XAML
<dxc:ChartControl.Diagram>  
               <dxc:XYDiagram2D x:Name="Diagram2D">  
                   <dxc:XYDiagram2D.AxisX>  
                       <dxc:AxisX2D GridLinesVisible="True">  

                       </dxc:AxisX2D>  

                   </dxc:XYDiagram2D.AxisX>  
                   <dxc:XYDiagram2D.Series>  
                       <dxc:BarSideBySideSeries2D x:Name="series" dx:DXSerializer.SerializationID="crmChartSeriesID"  
                                                      ArgumentDataMember="Argument"  
                                                      ValueDataMember="Value"  
                                                       ArgumentScaleType="Qualitative"  
                                                      DataSource="{Binding ChartData, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"  
                                                      AnimationAutoStartMode="PlayOnce">  
                           <dxc:BarSideBySideSeries2D.Model>  
                               <dxc:Quasi3DBar2DModel />  
                           </dxc:BarSideBySideSeries2D.Model>  
                           <dxc:BarSideBySideSeries2D.Label>  
                               <dxc:SeriesLabel ResolveOverlappingMode="Default" />  
                           </dxc:BarSideBySideSeries2D.Label>  
                       </dxc:BarSideBySideSeries2D>  
                   </dxc:XYDiagram2D.Series>  
               </dxc:XYDiagram2D>  
           </dxc:ChartControl.Diagram>  
           <dxc:ChartControl.Legend>  
               <dxc:Legend />  
           </dxc:ChartControl.Legend>  
       </dxc:ChartControl>

And here is how I am loading a workspace

C#
var workspaceManager = WorkspaceManager.GetWorkspaceManager(DockLayoutManager) as WorkspaceManager;  
              workspaceManager.TransitionEffect = TransitionEffect.Dissolve;  
              workspaceManager.LoadWorkspace("crmWorkspace", fileName);  
              workspaceManager.ApplyWorkspace("crmWorkspace");

Answers approved by DevExpress Support

DevExpress Support Team

created 9 years ago

Hi Roni,

Since the data source is a complex object and cannot be serialized automatically, you will need to manually initialize the chart's data source after restoring the workspace from a file. Please update your source code accordingly and let us know if you need any clarification.

Show previous comments (8)

Roni Hoffman 9 years ago

Thanks Alex,
I am still running into the issue. So I restored a workspace and then after its restored I tried a few things nothing seemed to work.
My chart has a few series/panes. I tried setting the individual data sources.
firstSeries.DataSource = (this.DataContext as ViewModel).FirstChartData;
secondSeries.DataSource = (this.DataContext as ViewModel).SecondChartData;
I also tried setting the data source for the entire chart itself but that didn't work either.
Is this the correct method and maybe I have something else wrong?

DevExpress Support Team 9 years ago

Hi Roni,

Please check whether or not adding the UpdateData method call solves the missing data issue. If this does not help, upload your sample project for further examination. We will check for a suitable solution.

Roni Hoffman 9 years ago

Hi Alex, so I was able to get the binding working after I restore a workspace via setting the binding manually.
var first = chart.Diagram.Series.FirstOrDefault(x => x.DisplayName.Equals("Series1"));
           if (first != null)
           {
               var binding = new Binding
               {
                   Path = new PropertyPath("Series1"),
                   UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
               };
               first.SetBinding(Series.DataSourceProperty, binding);
           }
but now the charts layout and events are not being restored.
so I have the diagram set as follows
<dxc:ChartControl.Diagram>
               <dxc:XYDiagram2D x:Name="Diagram2D">

<dxc:XYDiagram2D.PanesPanel>
                       <ItemsPanelTemplate>
                           <Grid>
                               <Grid.RowDefinitions>
                                   <RowDefinition Height="2*" />
                                   <RowDefinition Height="0.7*"/>
                                   <RowDefinition Height="0.7*" />
                               </Grid.RowDefinitions>
                           </Grid>
                       </ItemsPanelTemplate>
                   </dxc:XYDiagram2D.PanesPanel>

but after its restored from workspace each panel has the same height.
Also after its restored from workspace
<dxc:ChartControl Grid.Row="1" Name="chart" dx:DXSerializer.SerializationID="crmChartControlID"
                             AnimationMode="Disabled"
                             BorderThickness="0"
                             CrosshairEnabled="True"
                             ToolTipEnabled="True"
                         MouseLeftButtonDown="Chart_OnMouseLeftButtonDown"
                         MouseLeftButtonUp="Chart_OnMouseLeftButtonUp"
                         MouseMove="Chart_OnMouseMove">
none of the Mouse Events fire. Any ideas?

Roni Hoffman 9 years ago

Also I have tried using the ChartControl.SaveToFile and ChartControl.LoadFromFile methods and they do not work to fix this.

DevExpress Support Team 9 years ago

Hi Roni,

Thank you for the update. It would be helpful if you provide your sample project for further examination. We will examine the event handling issue in greater detail and check for a suitable solution.

Roni Hoffman 9 years ago

Attached Sample project.
Just hit the load workspace button. You a couple things.
1: The pane grid layout and the x axis label visibility is not restored.
2: The mouse move events on the legend do not work after the workspace is restored.

ChartLayout.7z

DevExpress Support Team 9 years ago

Hi Roni,

Special thanks for posting your sample project. Having examined this scenario in greater detail, we detected an issue that affected the Axis Label visibility after restoring the chart's layout at runtime. I have registered a separate ticket in this regard:

The Axis2D.VisibilityInPanes option is not restored correctly after applying the saved chart layout.

However, according to our tests, mouse event handlers defined in the MainWindow.xaml.cs source file are working as expected. A custom diagram layout defined in the ItemsPanelTemplate section is a complex object and it is not included in the serialized chart layout. You will need to apply this custom template manually after the chart layout is loaded.

Roni Hoffman 9 years ago

Thanks Alex
Ok a few things

Sorry you are right the events work but for some reason the drag/drop of the legend does not, after its loaded from a workspace. The mouse move event seems to be fine, but the legend does not move?
How can I apply the template manually? I tried this after the layout is loaded but it did not work.
Diagram2D.PanesPanel = new ItemsPanelTemplate();

var factory = new FrameworkElementFactory(typeof(Grid));
           var row1 = new FrameworkElementFactory(typeof(RowDefinition));
           row1.SetValue(RowDefinition.HeightProperty, new GridLength(2, GridUnitType.Star));
           var row2 = new FrameworkElementFactory(typeof(RowDefinition));
           row2.SetValue(RowDefinition.HeightProperty, new GridLength(0.7, GridUnitType.Star));
           var row3 = new FrameworkElementFactory(typeof(RowDefinition));
           row3.SetValue(RowDefinition.HeightProperty, new GridLength(0.7, GridUnitType.Star));
           factory.AppendChild(row1);
           factory.AppendChild(row2);
           factory.AppendChild(row3);
           Diagram2D.PanesPanel.VisualTree = factory;
           Series1Pane.SetValue(Grid.RowProperty, 0);
           Series2Pane.SetValue(Grid.RowProperty, 1);
           Series3Pane.SetValue(Grid.RowProperty, 2);
any ideas?
3) Will someone be looking at that second ticket about the VisiblityInPanes as well?
Thank for your help.

DevExpress Support Team 9 years ago

Hi Roni,

After the chart layout is restored, mouse events are not processed correctly because actual chart entities (e.g., Legend) are different from instance names referenced in your code. I have modified your example to illustrate how to access actual diagram layout items (Panes, Legend, X-Axis) at runtime. We will also continue working on the VisibilityInPanes issue and update the corresponding ticket status once we find a permanent solution. Let me know if you need further assistance. I will be happy to help you.

T295873.zip

Roni Hoffman 9 years ago

This works, Thank you very much Alex

DevExpress Support Team 9 years ago

You are always welcome, Roni!

Created: October 1, 2015 3:18 PM

Modified: October 9, 2015 1:58 PM

Platform: WPF

Product: DXCharts for WPF

IDE: Microsoft Visual Studio 2013

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Chart Data Source does not update after loading a workspace

Answers approved by DevExpress Support

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