Questions on UI for WPF Forum

1 answer

94 views

Line series preventing interpolation to produce a Manhattan bar effect

I would like to create a line series graph that does not interpolate between points: I've been told by the quants and traders that this is called a Manhattan bar plot.

I've attached a mock up of such a graph.I can get the current RadChartView to create this effect by inserting a duplicate data points

i.e.:
DataPoint(Time: 07:00, Price: $101.10) <-- previous price
DataPoint(Time: 08:00, Price: $101.10) <-- Duplicate inserted to prevent interpolation
DataPoint(Time: 08:00, Price: $111.10) <-- New price

The problem with inserting the dummy points is that is doubles the size of the data structure bound to the graph.

I took a look at the samples but didn't see anything about customizing the behavior of the LineSeries. Note we use the light renderer because we have a very large data set.
It seems like

BitmapLineRenderer.RenderCore()in Telerik.Windows.Controls.ChartView.

Is where the current interpolation is carried out?

ChartView

answered on 19 Dec 2012

3 answers

491 views

GridView CellValidating/RowValidating events are not firing up

Hi guys!

I have gridview with custom defined style for it's children. But when I set up cellvalidating | rowvalidating event, it's not fire up! Why??

GridView xaml:

<t:RadGridView Grid.Row="2" Style="{StaticResource OverrideDefaultGridViewStyle}" AddingNewDataItem="OnSpecGridViewAddingNewDataItem"

ItemsSource="{Binding Specifications, Mode=TwoWay}" x:Name="SpecGridView">

<t:RadGridView.Resources>

<DataTemplate x:Key="DraggedItemTemplate">

<StackPanel>

<StackPanel Orientation="Horizontal">

<TextBlock Text="{x:Static p:Resources.AddStandardWindow_TextBlock_Dragging}" />

<TextBlock Text="{Binding CurrentDraggedItem.SpecificationName}" FontWeight="Bold" />

</StackPanel>

<StackPanel Orientation="Horizontal">

<TextBlock Text="{Binding CurrentDropPosition}" FontWeight="Bold" MinWidth="45" Foreground="Gray"/>

<TextBlock Text=", (" Foreground="Gray" />

<TextBlock Text="{Binding CurrentDraggedOverItem.SpecificationName}" Foreground="Gray" />

<TextBlock Text=")" Foreground="Gray" />

</StackPanel>

</DataTemplate>

</t:RadGridView.Resources>

<t:RadGridView.Columns>

<t:GridViewColumn>

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<t:RadButton Content="X" Click="OnDeleteSpecificationButtonClicked" Style="{StaticResource ButtonCustomStyleRed}" />

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

<t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Specifications}">

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" Text="{Binding SpecificationName}"/>

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

<t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Parameter}" Width="20*">

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<t:RadComboBox Style="{StaticResource ComboBoxStyle}" ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type t:RadWindow}},

Path=DataContext.Parameters}" SelectedItem="{Binding Parameter}" DisplayMemberPath="ParameterName" />

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

<t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Nominal}" Width="20*">

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" KeyDown="OnKeyDown" Text="{Binding Nominal, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="OnNominalOrAccuracySourceUpdated">

</TextBox>

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

<t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Accuracy}"

Width="10*" Background="#D8E5F0">

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" KeyDown="OnKeyDown" Text="{Binding Accuracy,

NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="OnNominalOrAccuracySourceUpdated" />

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

<t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Precision}"

Width="10*"

Background="#D8E5F0">

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<TextBox KeyDown="OnKeyDown" Text="{Binding Presition, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" Style="{StaticResource OverrideDefaultTextBoxStyle}">

</TextBox>

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

<t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Min}" Width="10*">

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" KeyDown="OnKeyDown" Text="{Binding Minimum, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="OnMinOrMaxSourceUpdated">

</TextBox>

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

<t:GridViewColumn Header="{x:Static p:Resources.AddStandardWindow_Max}" Width="10*">

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<TextBox Style="{StaticResource OverrideDefaultTextBoxStyle}" KeyDown="OnKeyDown" Text="{Binding Maximum, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" SourceUpdated="OnMinOrMaxSourceUpdated">

</TextBox>

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

<t:GridViewColumn Width="40">

<t:GridViewColumn.CellTemplate>

<DataTemplate>

<Image Source="/Images/UpDown.png" Height="34" Width="34" Stretch="None"/>

</DataTemplate>

</t:GridViewColumn.CellTemplate>

</t:GridViewColumn>

</t:RadGridView.Columns>

</t:RadGridView>

P.S. I am not using these events here in this xaml. IS there any work around?

Thank you,
Ihor.

GridView

answered on 19 Dec 2012

5 answers

441 views

Update just one row in RadGridView

Hi,

I have a RadGridView and I bind a collection of objects (a large amount of data). I also have a context menu which is associated to each grid row and each context menu option will modify the grid view.
At this moment, every time an option is selected through context menu I refresh (rebind) all object collection which contain the correct information. The problem is that works fine when there are a few elements which is not my case.

So, I would like to know if there exists a way to "refresh" only the row which refer to opened context menu in order to avoid the actual lag.

GridView

answered on 19 Dec 2012

1 answer

213 views

RadPDFViewer to wcf Stream object

I am having trouble getting the RadPDF Viewer to bind to a wcf stream.

I am able to work with the stream and collect the bytes of the PDF in test so I know the wcf constructs are working, however when I attempt to bind the radPDFViewer to the stream object from wcf I get the error below. Is the RadPDFviewer only able to support memory stream and file streams?

A first chance exception of type 'System.NotSupportedException' occurred in Telerik.Windows.Documents.Fixed.dll

... snippet from wcf call.

StreamAttachment = client.DownloadAttachment(txtDocumentOID.Text); PdfDocumentSource source = new PdfDocumentSource(StreamAttachment); //, FormatProviderSettings.ReadOnDemand); this.pdfViewer.DocumentSource = source; this.pdfViewer.DocumentSource.Loaded += (s, e) => { StreamAttachment.Close(); };

Thanks

PDFViewer

answered on 19 Dec 2012

1 answer

82 views

[Solved] ScheduleView appointment presentation

Hello,

I have a question I've not found answer yet. I have a ScheduleView control, with a lot of coincidental appointments. I do need the ScheduleView to show them superimposed, the shorter over the larger ones, instead of show them side by side. Is this scenario possible?

Thank you in advance.

ScheduleView

answered on 19 Dec 2012

1 answer

243 views

How to set the background color of the column item

i've read some of the threads in the forum about how to style the item in Ganttview controls,such as the thread "specific color for each type of task " , the thread "Tree column frustrations ", the thread "Adding to GanttView Style "
but i still can not set the background color of the tree column item as same as the color of the task shown in the example program attachment in the thread "specific color for each type of task",and i can not set the color using DataTemplate for the column.
Is there any way in the current code to have the TreeColumn item background to be same as the task background color in the list ? How do I get at my data item from within a DataTemplate? The data context doesn't appear to be correct.
hope for your help

GanttView

answered on 19 Dec 2012

1 answer

131 views

Object Reference Error in FilterDescriptors.Clear()

Hi,

I upgraded my controls to WPF Q3 2012 (2012.3.1017.40) from 2012.1.215.40.

We have a button to reset all filters at once on top of the grid. It calls 1 line of code in the on click event.
<grid>.FilterDescriptors.Clear();

It has been working forever but after the upgrade has started showing intermittent issues. It does not happen all the time. Its not machine specific.Once it happens it does not correct itself and the only option is closing the app and reopening. There is no set of steps to reproduce the issue, and it seems to be very random.

The error & stacktrace is below,
MESSAGE:Object reference not set to an instance of an object.
STACKTRACE:   MESSAGE:Object reference not set to an instance of an object. STACKTRACE:   at Telerik.Windows.Controls.Data.DataFilter.CompositeFilterViewModel.FilterViewModelCollection.get_FilterDescriptors()
   at Telerik.Windows.Controls.Data.DataFilter.CompositeFilterViewModel.FilterViewModelCollection.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs args)
   at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at Telerik.Windows.Data.ObservableItemCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at Telerik.Windows.Data.RadObservableCollection`1.ResumeNotifications()
   at Telerik.Windows.Data.CollectionHelper.Reset(IEnumerable source, IList target, Func`2 itemConverter)
   at Telerik.Windows.Data.ObservableCollectionManager.HandleCollectionChanged(IList sender, NotifyCollectionChangedEventArgs args)
   at Telerik.Windows.Data.ObservableCollectionManager.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs args)
   at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at Telerik.Windows.Data.ObservableItemCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.ClearItems()
   at Telerik.Windows.Data.RadObservableCollection`1.ClearItems()
   at Telerik.Windows.Data.ObservableItemCollection`1.ClearItems()
   at System.Collections.ObjectModel.Collection`1.Clear()
   at <removed [Button_Click(s,e)]>

Help!

Thanks,
Erol

GridView

answered on 19 Dec 2012

1 answer

117 views

New WPF controls in 2013?

Hi,

is there a list with all new WPF-Controls coming up 2013?

Thanks
Best Regards
Rene

General Discussions

answered on 19 Dec 2012

0 answers

73 views

Group Header Template

Hi ,

I need to display Group header at the top of the child grid, But i am not implementing any grouping here, Simply i need to display the data in the child grid with a header.
Number of records in the child grid will be shown in the header.
how can i implement this, kindly help..

Thanks
Somasekharan

GridView

asked on 19 Dec 2012

0 answers

139 views

Starting Demos Projects

Hello,

First to say that Telerik team did excellent job, Bravo!!!

I have used previously some of the telerik controls and it was for ASP.net, and I had no problems at all/

This time I downloaded demos as Visual Studio projects and I wanted to give it a shot about its functionality. But I reached a dead end.

Every single project when I try to run it gives me 2 errors:
Can someone just give me some information, so I can start playing with these tools :)

Thanks

1. Project File Does Not Exist
2. Error 2 The command ""C:\Program Files (x86)\Telerik\RadControls for WPF Q1 2012\Demos\Examples\Carousel\..\..\ProjectFilesListGenerator\Compiled\ProjectFilesListGenerator.exe" /ProjectDir:'C:\Program Files (x86)\Telerik\RadControls for WPF Q1 2012\Demos\Examples\Carousel\' /OutputFileName:FilesList.xml /FileExtensions:cs,vb,xaml,txt,xml
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe" "C:\Program Files (x86)\Telerik\RadControls for WPF Q1 2012\Demos\Examples\Carousel\ProjectReferencesListGenerator.proj" /target:WriteReferencesToFile /property:References="System.XAML;System;System.Data;System.Xml;System.Core;System.Xml.Linq;System.Data.DataSetExtensions;Telerik.Windows.Controls;Telerik.Windows.Controls.DataVisualization, Version=2010.1.422.35, Culture=neutral, PublicKeyToken=5803cfa389c90ce7, processorArchitecture=MSIL;Telerik.Windows.Controls.Input;Telerik.Windows.Controls.Navigation;Telerik.Windows.Data;WindowsBase;PresentationCore;PresentationFramework";ProjectDir="C:\Program Files (x86)\Telerik\RadControls for WPF Q1 2012\Demos\Examples\Carousel\\"." exited with code 1. Carousel.WPF

General Discussions

asked on 18 Dec 2012