Questions on UI for WPF Forum

7 answers

242 views

Large Datasets

Hi,

I work with cartesian charts using a large number of series with a large number of points.
In example, 25 series with 150.000 points each.
All work pretty good but not if Zoom and/or Trackball is enabled.
I understand that this require a lot of processor use.

The two theoretical problems that occurs is:

1) For TrackBall: Find, for each Series, the points closer to one x value.
2) For Zoom: Find, for each series, points between x-min and x-max.

Now, I work with ordered datasets, so I can provide myself the methods that solve 1 and 2 efficently.

So my question.

I can override some methods in CartesiaChart, ChartPanAndZoomBehavior, ChartTrackBallBehavior, Other Classes, that can allow me to use this features also in giant charts? Or I can provide a "DataSourceManager" that solve efficently this problemns?

Thanks,
marcello

ChartView

answered on 17 Aug 2016

1 answer

432 views

Alert position using Ultrawide monitor (21:9 aspect ratio, 3440x1440 resolution)

Hello,

When using an "ultra wide" monitor, with a 21:9 aspect ratio, and 3440x1440 resolution, RadDesktopAlerts do not appear at the edge of the screen, but towards the center.

Is there any way to adjust this behaviour? Thanks

(Screenshot attached)

DesktopAlert

answered on 17 Aug 2016

1 answer

94 views

How to add a center point mark in diagram

Hi,

I want to set a center point (0,0 position) mark in diagram.

Is there a way I can set the mark without customer diagram shapes?

Regards,

Haochen.Ye

8/16/2016

Diagram

answered on 17 Aug 2016

1 answer

113 views

PanelBarItem not showing expand/collapse icon on second level

Can anyone tell me how to get the second level items to behave like the first level items? I would expect any level that has children to show an expander. In my example, the Send Items header should have an expander icon.

PanelBar

answered on 17 Aug 2016

1 answer

149 views

adding a shape from ribbon to the wpf diagram

Hi dear telerik supporters,

I need to add a custom shape from a ribbon (not diagram toolbox) to the wpf diagram control in the way that the user can drag the ribbon button to the diagram control and drop it in the right position to draw it. how can I do that?

Best regards,

Diagram

answered on 17 Aug 2016

2 answers

358 views

Allow Drag and Drop, Prevent reorder

I have a RadListBox that I am dragging items to a RadDiagram. This part works, but I can't figure out how to prevent reorder from within the RadListBox. I have tried several things. I just want to prevent the horizontal line from showing when the item is dragged away from the listboxand move to a different position within the list box.

This is my current code.

Xaml (Simplified to focus on problem)

01.<UserControl>

02. <UserControl.Resources>

03. <Style x:Key="DraggableListBoxItem" TargetType="telerik:RadListBoxItem" BasedOn="{StaticResource RadListBoxItemStyle}">

04. <Setter Property="telerik:DragDropManager.AllowDrag" Value="True" />

05. </Style>

06. </UserControl.Resources>

07.

08. <Grid Margin="5">

09. <Grid.ColumnDefinitions>

10. <ColumnDefinition Width="Auto" />

11. <ColumnDefinition Width="*" />

12. </Grid.ColumnDefinitions>

13.

14. <Grid>

15. <telerik:RadListBox Margin="0 10 0 0" Width="250" Grid.IsSharedSizeScope="True"

16. Background="Transparent" ScrollViewer.HorizontalScrollBarVisibility="Disabled" AllowDrop="False"

17. ItemContainerStyle="{StaticResource DraggableListBoxItem}"

18. ItemsSource="">

19. <telerik:RadListBox.DragDropBehavior>

20. <behaviors:DatasourceDragDropBehavior AllowReorder="False" />

21. </telerik:RadListBox.DragDropBehavior>

22.

23. <telerik:RadListBox.DragVisualProvider>

24. <telerik:ScreenshotDragVisualProvider />

25. </telerik:RadListBox.DragVisualProvider>

26.

27. <telerik:RadListBox.ItemTemplate>

28. <DataTemplate>

29. <Grid>

30. </Grid>

31. </DataTemplate>

32. </telerik:RadListBox.ItemTemplate>

33. </telerik:RadListBox>

34. </Grid>

35.

36. <Grid>

37. <telerik:RadDiagram IsSnapToGridEnabled="True" BorderThickness="1" BorderBrush="Black">

38. </telerik:RadDiagram>

39. </Grid>

40. </Grid>

41.</UserControl>

Behavior

01. class DatasourceDragDropBehavior : ListBoxDragDropBehavior

02. {

03. public override void DragDropCompleted(DragDropState state)

04. {

05. //implement some custom logic here

06. //Do not call -> base.DragDropCompleted(state);

07. }

08.

09. public override bool CanDrop(DragDropState state)

10. {

11. return state.IsSameControl == false;

12. }

13. }

ListBox

answered on 16 Aug 2016

9 answers

940 views

WPF RadGridView Very Bad Performance when Binding

I use RadGridView , my business is display stock market ,so high performance is a must .
When i use Regular WPF DataGrid with MVVM Design Pattern it's working very good for my , when i replace (WPF DataGrid) with (RadGridView ) the performance became very bad , your fast response is highly appreciated , See the the Following

View Model :

using INtra_Day_EXplorer.Business_Logic; using ServiceClient.HistoricalINDEXServiceClient; using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.ComponentModel; using System.Dynamic; using System.Linq; using System.Text; using System.Windows.Documents; using System.Timers; using System.Diagnostics; using System.Threading; using System.Windows.Threading; namespace INtra_Day_EXplorer.View { class Market { #region FBD - MSeif - 29-10-2013 Properties private MarketWatch[] data = null; private Stopwatch stopWatch = new Stopwatch(); private ServiceWrapper serviceWrapper = ServiceWrapper.GetSingleton(); IEnumerable<short> IntCompanyCode { get; set; } IEnumerable<short> IntSectorCode { get; set; } List<short> CompaniesSectorsCodes { get; set; } private dynamic ExpandoTemplate { get; set; } public Boolean IsRun { get; set; } private int index { get; set; } #endregion #region FBD - MSeif - 28-10-2013 - Binding Lists for (Sector/Comapny/Comapies inside Sctors) private ObservableCollection<ExpandoObject> bindingList_CurrentCompanyWatch = new AsyncObservableCollection<ExpandoObject>(); public ObservableCollection<ExpandoObject> BindingList_CurrentCompanyWatch { get { return bindingList_CurrentCompanyWatch; } set { bindingList_CurrentCompanyWatch = value; } } private ObservableCollection<ExpandoObject> bindingList_CurrentSectorWatch = new AsyncObservableCollection<ExpandoObject>(); public ObservableCollection<ExpandoObject> BindingList_CurrentSectorWatch { get { return bindingList_CurrentSectorWatch; } set { bindingList_CurrentSectorWatch = value; } } private ObservableCollection<ExpandoObject> bindingList_CurrentSectorDetailsWatch = new AsyncObservableCollection<ExpandoObject>(); public ObservableCollection<ExpandoObject> BindingList_CurrentSectorDetailsWatch { get { return bindingList_CurrentSectorDetailsWatch; } set { bindingList_CurrentSectorDetailsWatch = value; } } #endregion /// <summary> /// FBD - MSeif - 28-10-2013 /// Get List Of Codes(Sctor/Company) and start Load data to Binding Lists (Using Backgroud thread) /// </summary> public Market() { //get companies Codes<br

>            IntCompanyCode = CompanyManager.WorkingCompanies.FindAll((CompanyInfo cinfo) => cinfo.Code <= MainData.LAST_COMPANY_CODE && cinfo.Code >= MainData.FIRST_COMPANY_CODE).Select(c => c.Code);<

br> //get sectors Codes<br

>            IntSectorCode = CompanyManager.WorkingCompanies.FindAll((CompanyInfo cinfo) => cinfo.Code <= MainData.LAST_PDS_CODE).Select(c => c.Code);<

br> //set all codes(sectors/comapnies) in one list CompaniesSectorsCodes = IntCompanyCode.ToList(); for (int i = 0; i < IntSectorCode.ToList().Count; i++) { CompaniesSectorsCodes.Add(IntSectorCode.ToList()[i]); } IsRun = true;//allow load data from WCF service // Create new instance of the thread. Thread marketWatchThrd = new Thread(new ThreadStart(RunMarketWatch)); // Set the thread to be a background one marketWatchThrd.IsBackground = true; // Start the order book requests marketWatchThrd.Start(); } /// <summary> /// FBD - MSeif - 28-10-2013 /// Get Data from WCF service and bind this data to it's List(Sectors/Companies) /// </summary> protected void RunMarketWatch() { while (IsRun) { try { //Load Data For (Sctors/Companies)<br

>                    data = serviceWrapper.ServiceReference.GetCurrentMarketWatch(CompaniesSectorsCodes.ToArray());<

br> if (data != null) { for (int i = 0; i < data.Length; i++) { // sector check if (data[i].SymbolID <= MainData.LAST_PDS_CODE) {<br

>                                ExpandoTemplate = ToDynamic(data[i]);//Cast each object(Sector) from BackEnd to be Dynamic object(ExpandoObject)<

br> index = BindingList_CurrentSectorWatch.Cast<dynamic>().Where(c => c.SymbolID == ExpandoTemplate.SymbolID).Select<dynamic, int>(x => BindingList_CurrentSectorWatch.IndexOf(x)).SingleOrDefault<int>();//Get the Index For Current Sector in the binding list <br

>                                if (IntSectorCode.ToList().Count > BindingList_CurrentSectorWatch.Count)<

br

>                                    BindingList_CurrentSectorWatch.Add(ExpandoTemplate);//add new sector to the binding list<

br> else {<br

>                                    BindingList_CurrentSectorWatch[index] = ExpandoTemplate;//Edit sector to the binding list<

br> } } else//Companies check {<br

>                                ExpandoTemplate = ToDynamic(data[i]);//Cast each object(company) from BackEnd to be Dynamic object(ExpandoObject)<

br> index = BindingList_CurrentCompanyWatch.Cast<dynamic>().Where(c => c.SymbolID == ExpandoTemplate.SymbolID).Select<dynamic, int>(x => BindingList_CurrentCompanyWatch.IndexOf(x)).SingleOrDefault<int>();//Get the Index For Current company in the binding list <br

>                                if (IntCompanyCode.ToList().Count > BindingList_CurrentCompanyWatch.Count)<

br

>                                    BindingList_CurrentCompanyWatch.Add(ExpandoTemplate);//add new company to the binding list<

br> else {<br

>                                    BindingList_CurrentCompanyWatch[index] = ExpandoTemplate;//edit new sector to the binding list<

br> } } } } } catch (Exception ex) { String str = ex.Message; // throw; } Thread.Sleep(200); } } /// <summary> /// FBD - MSeif - 28-10-2013 /// Cast any object to Dynamic object(ExpandoObject) /// </summary> /// <param name="value">Object to be Cast</param> /// <returns>Dynamic Object(Exbando Object)</returns> public static dynamic ToDynamic(object value) { IDictionary<string, object> expando = new ExpandoObject(); foreach (PropertyDescriptor property in TypeDescriptor.GetProperties(value.GetType())) expando.Add(property.Name, property.GetValue(value)); return expando as ExpandoObject; } /// <summary> /// FBD - MSeif -29-10-2013 /// Load Childs Companies to Specific sector /// </summary> /// <param name="SectorSymbolID"Sector Symbol ID></param> public void LoadChilds(short[] codes) { data = (dynamic)serviceWrapper.ServiceReference.GetCurrentMarketWatch(codes); if (data != null) { bindingList_CurrentSectorDetailsWatch = (dynamic)(data);//new ObservableCollection<MarketWatch> } } } } <div></div>

XAML :

<div><UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" <br

>             xmlns:telerikQuickStart="clr-namespace:Telerik.Windows.Controls.QuickStart;assembly=QuickStart.Common" <

br> xmlns:local="clr-namespace:INtra_Day_EXplorer.View.UserControls" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class ="INtra_Day_EXplorer.View.UserControls.ucMarketWatch" xmlns:MarketWatch="clr-namespace:INtra_Day_EXplorer.View" d:DesignWidth="535" d:DesignHeight="205"> <UserControl.Resources> <DataTemplate x:Key="StockChangeTemplate"> <local:ucStockPricePresenter StockPrice="{Binding Change}" OldStockPrice="{Binding ChangePrev}" /> </DataTemplate> <DataTemplate x:Key="StockChangePercTemplate"> <local:ucStockPricePresenter StockPrice="{Binding ChangePerc}" OldStockPrice="{Binding ChangePercPrev}" /> </DataTemplate> <DataTemplate x:Key="StockMoneyValueTemplate"> <local:ucStockPricePresenter StockPrice="{Binding MoneyValue}" OldStockPrice="{Binding MoneyValuePrev}" /> </DataTemplate> <DataTemplate x:Key="StockTradesTemplate"> <local:ucStockPricePresenter StockPrice="{Binding _trades}" OldStockPrice="{Binding TradesPrev}" /> </DataTemplate> <DataTemplate x:Key="StockTransactionPriceTemplate"> <local:ucStockPricePresenter StockPrice="{Binding _transactionPrice}" OldStockPrice="{Binding TransactionPricePrev}" /> </DataTemplate> <DataTemplate x:Key="StockVolumeTemplate"> <local:ucStockPricePresenter StockPrice="{Binding Volume}" OldStockPrice="{Binding VolumePrev}" /> </DataTemplate> <Style x:Key="DataGridContentCellCentering" TargetType="{x:Type DataGridCell}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type DataGridCell}"> <Grid Background="{TemplateBinding Background}"> <ContentPresenter VerticalAlignment="Center" /> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> <MarketWatch:Market x:Key="Market"></MarketWatch:Market> </UserControl.Resources> <Grid DataContext="{StaticResource Market}"> <Grid.RowDefinitions> <RowDefinition Height="20"></RowDefinition> <RowDefinition Height="21*"></RowDefinition> </Grid.RowDefinitions> <Grid Grid.Row="0"> <Grid.ColumnDefinitions> <ColumnDefinition Width="5*"/> <ColumnDefinition Width="6*"/> </Grid.ColumnDefinitions> <Canvas Grid.Column="1" > <telerik:RadComboBox x:Name="cb_View" SelectionChanged="cb_View_SelectionChanged" Width="80" Canvas.Right="10" Canvas.Top="5" Grid.Column="1" SelectedIndex="0" > <telerik:RadComboBoxItem Content="Company"/> <telerik:RadComboBoxItem Content="Sector"/> </telerik:RadComboBox> <telerik:RadComboBox x:Name="cb_Currency" Canvas.Right="95" Canvas.Top="5" Width="60" /> <TextBox Name="txt_Rate" Text="{Binding ChangePrev}" Canvas.Top="5" Canvas.Right="160" Width="60" TextChanged="txt_Rate_TextChanged" KeyDown="txt_Rate_KeyDown"></TextBox> </Canvas> </Grid> <telerik:RadGridView x:Name="grd_Result_Sector"  GroupRenderMode="Flat" <span class="Apple-tab-span" style="white-space:pre"> AutoGenerateColumns="False" <span class="Apple-tab-span" style="white-space:pre"> CanUserFreezeColumns="True" CanUserDeleteRows="True" CanUserInsertRows="False" IsReadOnly ="True" Grid.Row="1" <span class="Apple-tab-span" style="white-space:pre"> RowIndicatorVisibility="Collapsed" BorderThickness="1" BorderBrush="#3090C7" Visibility="Hidden" ItemsSource="{Binding BindingList_CurrentSectorWatch}" <span class="Apple-tab-span" style="white-space:pre"> IsFilteringAllowed="True" Margin="1,10,1,1" ShowGroupPanel="False" AlternationCount="2"> <telerik:RadGridView.Columns> <telerik:GridViewDataColumn Header="Name" DataMemberBinding="{Binding CompanyName}" Width="*" /> <telerik:GridViewDataColumn Header="Code" DataMemberBinding="{Binding SymbolID,StringFormat={}{0:0.####}}" Width="*" /> <telerik:GridViewDataColumn Header="Change" CellTemplate="{StaticResource StockChangeTemplate}" DataMemberBinding="{Binding Change}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Change Percentage" CellTemplate="{StaticResource StockChangePercTemplate}" DataMemberBinding="{Binding ChangePerc}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Money Value" CellTemplate="{StaticResource StockMoneyValueTemplate}" DataMemberBinding="{Binding MoneyValue}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Trades" CellTemplate="{StaticResource StockTradesTemplate}" DataMemberBinding="{Binding _trades}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Transaction Price" CellTemplate="{StaticResource StockTransactionPriceTemplate}" DataMemberBinding="{Binding _transactionPrice}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Volume" CellTemplate="{StaticResource StockVolumeTemplate}" DataMemberBinding="{Binding Volume}" DataFormatString="{}{0:C}" Width="*" /> </telerik:RadGridView.Columns> </telerik:RadGridView> <telerik:RadGridView x:Name="grd_Result_Company" GroupRenderMode="Flat" <span class="Apple-tab-span" style="white-space:pre"> AutoGenerateColumns="False" <span class="Apple-tab-span" style="white-space:pre"> CanUserFreezeColumns="True" CanUserDeleteRows="True" CanUserInsertRows="False" IsReadOnly ="True" Grid.Row="1" <span class="Apple-tab-span" style="white-space:pre"> RowIndicatorVisibility="Collapsed" BorderThickness="1" BorderBrush="#3090C7" Visibility="Visible" ItemsSource="{Binding BindingList_CurrentCompanyWatch}" <span class="Apple-tab-span" style="white-space:pre"> IsFilteringAllowed="True" Margin="1,10,1,1" ShowGroupPanel="False" AlternationCount="2"> <telerik:RadGridView.Columns>   <telerik:GridViewDataColumn Header="Code" DataMemberBinding="{Binding SymbolID}" Width="*" /> <telerik:GridViewDataColumn Header="Change" CellTemplate="{StaticResource StockChangeTemplate}" DataMemberBinding="{Binding Change}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Change Percentage" CellTemplate="{StaticResource StockChangePercTemplate}" DataMemberBinding="{Binding ChangePerc}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Money Value" CellTemplate="{StaticResource StockMoneyValueTemplate}" DataMemberBinding="{Binding MoneyValue}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Trades" CellTemplate="{StaticResource StockTradesTemplate}" DataMemberBinding="{Binding _trades}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Transaction Price" CellTemplate="{StaticResource StockTransactionPriceTemplate}" DataMemberBinding="{Binding _transactionPrice}" DataFormatString="{}{0:C}" Width="*" /> <telerik:GridViewDataColumn Header="Volume" CellTemplate="{StaticResource StockVolumeTemplate}" DataMemberBinding="{Binding Volume}" DataFormatString="{}{0:C}" Width="*" /> </telerik:RadGridView.Columns> </telerik:RadGridView> </Grid> </UserControl> <div> </div> </div>

In Code Behind :
I Only Declare Market Object :

Market objMarket = new Market();

GridView

answered on 16 Aug 2016

14 answers

189 views

DataFormatString Binding is ignored in nested sub grid view

I have nested sub grid views in my main grid view.

I use this technique for the sub grid:

<tk:RadGridView.HierarchyChildTemplate>

<DataTemplate>

<tk:RadGridView

I use DataFormatString binding like this in the sub grid:

<tk:GridViewDataColumn DataMemberBinding="{Binding Path=CustomerObject.Birthday}"

DataFormatString="{Binding Path=CustomerObject.BirthdayFormatString}"

The "Birthday" value binds just fine but for some reason, the "BirthdayFormatString" binding gets completely ignored. I don't even get a binding error in the console debug output. If I set "DataFormatString" to some constant value like "d" it formats correctly.

It seems that a binding does not get resolved correctly in nested sub grids.

Note that the same technique works fine in the main grid view.

GridView

answered on 16 Aug 2016

2 answers

214 views

RadContextMenu with RadRibbonDropDownButton

Hi,

I have a RadRibbonDropDownButton which has RadContextMenu set to its DropDownContent. My issue is after selection of any RadMenuItem we perform some action & dropdown gets closed but the focus is still set to the RadRibbondropDownButton due to which upon any other RadButton selection within the same RadRibbon doesn't not allow me select for the first click & upon next click the focus is lost for the RadRibbondropDownButton & things are normal.

Why does the RadRibbondropDownButton has this Focus issue?? I have read somewhere that: "Setting the RadContextMenu as direct content in DropDownButton could lead to various focus issues which need additional code to bypass. For direct content in Popups/DropDownContents its better to use RadMenu instead of RadContextMenu". I have replaced RadContextMenu with RadMenu but still issue persists.

Did someone faced the same issue??

Regards,

Deepthi

ContextMenu

answered on 16 Aug 2016

1 answer

214 views

IsolatedStorage + Citrix (Roaming-User)

Hello!

Our application is hosted on a Citrix/XenApp server and we are using the PersistenceFramework from Telerik.

On Citrix/XenApp we have the problem, that the IsolatedStorage will be lost each time, a user is signing off from his computer - so the files in the "Local"-folder are deleted.

Is there a way to save the files in the Roaming-folder?

thx

Ludwig

PersistenceFramework

answered on 16 Aug 2016