Software FX Community

The graph and gridlines often don't match with the labels on the y-axis. This seems to be dependent on the values and  once a zoom and un-zoom of the whole application window is done the chart mostly gets redrawn without the problem.

The problem exist with line and bar charts. Is there a workaround for this? 

Can you please send us a sample app that duplicates this issue? If this is not possible, please send us details about the settings applied to the chart (both XAML and code) as well as the data that seems to trigger this behavior.

Regards,

JuanC

Thanks for answering so quickly.

Please find further down the code I use. An interesting point: if I do a refresh at the end of the data assignment in the presenter class then the chart gets drawn without the problem :  View.fxVamiChart.Refresh();

    <UserControl.Resources>

       ...
       <report:FXchartSeries x:Key="vamiChartData"/>
    </UserControl.Resources>
  
       ... 

            <ChartFX:Chart  Name ="fxVamiChart" Grid.Row="0" Grid.Column="0"  Width="500" Height="340" ItemsSource="{Binding Source={StaticResource vamiChartData}}" Gallery="Line">

                <ChartFX:Chart.Titles>
                    <ChartFX:Title  FontSize="16" Foreground="Black">value added monthly index (VAMI)</ChartFX:Title>
                </ChartFX:Chart.Titles>

                <ChartFX:Chart.AxisY>
                    <ChartFX:Axis  Title="" >

                        <ChartFX:Axis.Grids>
                            <ChartFX:Grids Minor="{x:Null}">
                                <ChartFX:Grids.Major>
                                    <ChartFX:GridLine Stroke="LightGray"  Visibility="Visible"/>
                                </ChartFX:Grids.Major>
                            </ChartFX:Grids>
                        </ChartFX:Axis.Grids>

                    </ChartFX:Axis>
                </ChartFX:Chart.AxisY>
                <ChartFX:Chart.Series>
                    <ChartFX:SeriesAttributes ToolTips="{x:Null}" BindingPath="Val" >
                        <ChartFX:SeriesAttributes.Marker>
                            <ChartFX:MarkerAttributes Stroke="{x:Null}" Visibility="Hidden" />
                        </ChartFX:SeriesAttributes.Marker>
                    </ChartFX:SeriesAttributes>
                </ChartFX:Chart.Series>

                <ChartFX:Chart.AxisX>
                    <ChartFX:Axis Title="Time">

                        <ChartFX:Axis.Grids>
                            <ChartFX:Grids Minor="{x:Null}" >
                                <ChartFX:Grids.Major>
                                    <ChartFX:GridLine Stroke="LightGray"  Visibility="Hidden" />
                                </ChartFX:Grids.Major>
                            </ChartFX:Grids>
                        </ChartFX:Axis.Grids>

                        <ChartFX:Axis.Labels>
                            <ChartFX:AxisLabelAttributes BindingPath="Cat"  Angle="90" />
                        </ChartFX:Axis.Labels>

                    </ChartFX:Axis>
                </ChartFX:Chart.AxisX>

            </ChartFX:Chart>

===> In the code-behind class (View)

        public FXchartSeries ChartVAMI { get { return (FXchartSeries)this.FindResource("vamiChartData"); } }

===> In the presenter class

                    View.ChartVAMI.Clear();
                    View.ChartVAMI.Add(new Reporting.Point { Cat = dates[0].ToString("MMM yy"), Val = 100 });

                    for (int i = 0; i < performance.Index.Length; i++)
                    {
                        View.ChartVAMI.Add(new Reporting.Point { Cat = dates[i + 1].ToString("MMM yy"), Val = 100 * performance.Index[i] });
                    }

===> The Reporting.Point class

    public class Point
    {
        public double Val { get; set; }
        public string Cat { get; set; }
        public string Tx { get; set; }
        public double X { get; set; }
        public DateTime Time { get; set; }
    }

Can you tell use when is the code that adds the data points being executed? Do you run in on the Loaded event for your Window? In a button? In a separate thread?

Regards,

JuanC

It's getting a bit difficult now. I use the Smart Client framework WPFCAB - a full  port of CAB to WPF and update several charts in an event subscription. The thread which does the work is the user interface thread.

 As to how CAB does all the event mapping to .net I cannot say.

 Kind regards,

Stefan

==> The event gets fired :

      WorkItem.RootWorkItem.EventTopics[BusinessEntities.Constants.PortfolioQuantChanged].Fire(

==> and triggers a couple of charts to be redrawn with new data:

 ....

}

It's getting a bit difficult now. I use the Smart Client framework WPFCAB - a full  port of CAB to WPF and update several charts in an event subscription. The thread which does the work is the user interface thread.

 As to how CAB does all the event mapping to .net I cannot say.

 Kind regards,

Stefan

==> The event gets fired :

      WorkItem.RootWorkItem.EventTopics[BusinessEntities.Constants.PortfolioQuantChanged].Fire(

==> and triggers a couple of charts to be redrawn with new data:

 ....

}