Questions on UI for WPF Forum

1 answer

296 views

Is TouchDragTrigger no longer available (it is missing in 2024.2.514.70) ?

It is not in Telerik.Windows.Controls.dll for WPF70 2024.2.514.70

GridView

answered on 20 Jun 2024

2 answers

70 views

RadCartesianChart LinearAxis DateFormat Germany?

Hi,

i found a sample:

    <Window.Resources>
        <local:DoubleToDateTimeLabelConverter x:Key="DoubleToDateTimeLabelConverter" />
    </Window.Resources>
    <Grid>
        <telerik:RadCartesianChart>
            <telerik:RadCartesianChart.HorizontalAxis>
                <telerik:LinearAxis>
                    <telerik:LinearAxis.LabelTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding StringFormat='h:MM tt', Converter={StaticResource DoubleToDateTimeLabelConverter}}" />
                        </DataTemplate>
                    </telerik:LinearAxis.LabelTemplate>
                </telerik:LinearAxis>
            </telerik:RadCartesianChart.HorizontalAxis>
            
            <telerik:RadCartesianChart.VerticalAxis>
                <telerik:CategoricalAxis />
            </telerik:RadCartesianChart.VerticalAxis>
            
            <telerik:LineSeries CategoryBinding="City" ValueBinding="StartTimeOA" ItemsSource="{Binding}" />
        </telerik:RadCartesianChart>
    </Grid>

        public MainWindow()
        {
            InitializeComponent();

            var Items = new ObservableCollection<PlotItemViewModel>();
            var dateTime = DateTime.Now;
            Items.Add(new PlotItemViewModel() { City = "Atlanta", StartTime = dateTime.AddMinutes(5) });
            Items.Add(new PlotItemViewModel() { City = "Atlanta", StartTime = dateTime.AddMinutes(10), });
            Items.Add(new PlotItemViewModel() { City = "New York", StartTime = dateTime.AddMinutes(100), });
            Items.Add(new PlotItemViewModel() { City = "Miami", StartTime = dateTime.AddMinutes(120), });
            Items.Add(new PlotItemViewModel() { City = "Miami", StartTime = dateTime.AddMinutes(150), });
            Items.Add(new PlotItemViewModel() { City = "Savannah", StartTime = dateTime.AddMinutes(200), });
            Items.Add(new PlotItemViewModel() { City = "Birmingham", StartTime = dateTime.AddMinutes(250), });
            Items.Add(new PlotItemViewModel() { City = "New Orleans", StartTime = dateTime.AddMinutes(280), });

            this.DataContext = Items;
        }
    }

    public class PlotItemViewModel
    {
        public string City { get; set; }
        public DateTime StartTime { get; set; }
        public double StartTimeOA { get { return this.StartTime.ToOADate(); } }
    }

    public class DoubleToDateTimeLabelConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            double doubleValue = double.Parse(value.ToString());
            return DateTime.FromOADate(doubleValue);
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

The Result is:

Here is the Dateformat "us-US" (10:05 AM / 4:06 PM) but i need German "de-DE" (10:05 / 16:06) !

Have anyone a idea how i can do this?

Best regards

Bernd

ChartView

answered on 19 Jun 2024

1 answer

90 views

WPF RadGridView OnCellEditEnded with Custom column NewData and OldData are always empty

We have the similar problem on 2024.1.228.45
https://www.telerik.com/forums/gridview-celleditended-returns-null-data-properties-for-custom-column

Is there any solution to get NewData and OldData on OncellEditEnded for a custom column?

GridView

answered on 18 Jun 2024

0 answers

47 views

Changing table properties in code after calling InsertTable()

I have a button which inserts a table.

myRichTextBox.InsertTable(2,4)

I want to modify some properties on the table after it is inserted.

I want to set fontsize, fontfamily, change border and cell color to RED and make it so that the table will always fill the available width. Is this a possibility? Or do I have to manually build out the entire table and insert at cursor location?

RichTextBox

asked on 17 Jun 2024

0 answers

75 views

Removing Tabs programmatically.

Hello,

I'm trying to remove tab items from RadTabControl where ItemsSource is bound to an ObservableCollection<RadTabItem>. However, when an item is deleted from the collection the tab does not disappear. The desired behavior is for the tab to disappear. What do I need to do to achieve this?

Here's what I have:

xaml declaration:

 <telerik:RadTabControl x:Name="radTabControl"  
                     
                                ItemsSource="{ Binding Tabs }"
                                Padding="0, 0, 0, 0" 
                                Margin="0, 0, 0, 0" >

         </telerik:RadTabControl>

Here, I declare Tabs as an observable collection:

   public ObservableCollection<RadTabItem> Tabs { get; set; }

Here is where the tab items are deleted:

  private void RemoveTab(int dev)
        {
                Tabs.Clear();
 
        }

I'm not very familiar with WPF and Telerik in general. Any help would be appreciated.

Thanks.

TabControl

asked on 11 Jun 2024

2 answers

100 views

RadGridView randomly changes cell content

Hi,

I'm using the CellLoaded event to customize a RadGridView. Setting a background brush and foreground + fontweight for the TextBlock in the cell works as expected. I'm also using the AutoGeneratingColumn event to set a DataTemplate for a column.

Now I want to use DataTemplates for individual cells. But when I do so I have to set a DataTemplate for every cell, every time it's rendered. If I'm not setting a DataTemplate I get a random content from a random cell, everytime a cell is scrolled into view. If I'm using DataTemplates for all cells I can't edit the cells anymore.

Is there anything I can do to stop the RadGridView messing up my cells? Changing the virtualization settings didn't changed anything, even if I disabled virtualization (VirtualizingPanel.IsVirtualizing="False").

This is my GridView now:

<telerik:RadGridView AutoGenerateColumns="True"
                     VirtualizingPanel.VirtualizationMode="Recycling"                                     
                     Grid.Row="1"
                     x:Name="Gv"
                     Margin="0 20 10 0"
                     SelectionMode="Extended"
                     SelectionUnit="Cell"
                     CellLoaded="GvCellLoaded"
                     BeginningEdit="GvEditBegins"
                     CellEditEnded="CellEditEnded"
                     AutoExpandGroups="True"
                     GroupRenderMode="Flat"
                     ValidatesOnDataErrors="None"
                     telerik:TouchManager.TouchMode="None"
                     CanUserSortColumns="False"
                     CanUserSortGroups="False"
                     IsReadOnly="False"
                     AllowDrop="True"
                     ItemsSource="{Binding Items}"
                     FrozenColumnsSplitterVisibility="Collapsed"
                     ContextMenuOpening="GvContextMenuOpening"
                     ScrollViewer.VerticalScrollBarVisibility="Visible"
                     ScrollViewer.HorizontalScrollBarVisibility="Visible"
                     PreviewMouseRightButtonDown="GvRightMouseDown"
                     PreviewMouseLeftButtonDown="GvMouseDown"
                     PreviewMouseLeftButtonUp="GvMouseUp"
                     AutoGeneratingColumn="GvAutoGenerate">

GridView

answered on 11 Jun 2024

1 answer

545 views

.NET 8 support?

I was surprised when I downloaded the latest Q2 release to not find any folder with .NET 8 DLLs, only .NET 7.

NET 7 is already at "End of Support" as of May 14th according to Microsoft.

https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core

Considering NET 8 is designated as having LTS (long term support) from Microsoft I was wondering what Telerik's plans are regarding a NET 8 release of your WPF suite?

We would like to move from .NET 6 which we currently use, to .NET 8 which has LTS.

General Discussions

answered on 11 Jun 2024

0 answers

124 views

Setting OverrideColor of RadSVGImage in DataTrigger

Hello,

I'm not sure if this is a bug or if this just isn't the way to change the OverrideColor for this case. I ran into an error when attempting to use the following:

<telerik:RadToggleButton Grid.Row="0" Background="Transparent" BorderThickness="0">
    <telerik:RadToggleButton.Content>
        <telerik:RadSvgImage Height="60" Width="60">
            <telerik:RadSvgImage.Style>
                <Style TargetType="telerik:RadSvgImage">
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding IsChecked, RelativeSource={RelativeSource AncestorType=telerik:RadToggleButton}}" Value="False">
                            <Setter Property="UriSource" Value="{Binding RelativeSource={RelativeSource AncestorType={x:Type local:MainWindow}}, Path=PlusImagePath}"/>
                            <Setter Property="OverrideColor" Value="Blue"/>
                        </DataTrigger>
                        <DataTrigger Binding="{Binding IsChecked, RelativeSource={RelativeSource AncestorType=telerik:RadToggleButton}}" Value="True">
                            <Setter Property="UriSource" Value="{Binding RelativeSource={RelativeSource AncestorType={x:Type local:MainWindow}}, Path=MinusImagePath}"/>
                            <Setter Property="OverrideColor" Value="Red"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </telerik:RadSvgImage.Style>
        </telerik:RadSvgImage>
    </telerik:RadToggleButton.Content>
</telerik:RadToggleButton>

My intention here is to have the OverrideColor change the color of the svg image I am also setting using UriSource. I get the following error only when going from IsChecked being true to being false.

System.NullReferenceException
  HResult=0x80004003
  Message=Object reference not set to an instance of an object.
  Source=Telerik.Windows.Controls
  StackTrace:
   at Telerik.Windows.Controls.RadSvgImage.OverrideColorPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) in Telerik.Windows.Controls\RadSvgImage.cs:line 414
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
   at System.Windows.StyleHelper.InvalidateDependents(Style ownerStyle, FrameworkTemplate frameworkTemplate, DependencyObject container, DependencyProperty dp, FrugalStructList`1& dependents, Boolean invalidateOnlyContainer)
   at System.Windows.StyleHelper.OnBindingValueInStyleChanged(Object sender, BindingValueChangedEventArgs e)
   at System.Windows.Data.BindingExpressionBase.ChangeValue(Object newValue, Boolean notify)
   at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.ScheduleTransfer(Boolean isASubPropertyChange)
   at MS.Internal.Data.ClrBindingWorker.NewValueAvailable(Boolean dependencySourcesChanged, Boolean initialValue, Boolean isASubPropertyChange)
   at MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k, ICollectionView collectionView, Object newValue, Boolean isASubPropertyChange)
   at MS.Internal.Data.PropertyPathWorker.OnDependencyPropertyChanged(DependencyObject d, DependencyProperty dp, Boolean isASubPropertyChange)
   at MS.Internal.Data.ClrBindingWorker.OnSourceInvalidation(DependencyObject d, DependencyProperty dp, Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.HandlePropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.Data.BindingExpressionBase.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.Data.BindingExpression.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.DependentList.InvalidateDependents(DependencyObject source, DependencyPropertyChangedEventArgs sourceArgs)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetCurrentValueInternal(DependencyProperty dp, Object value)
   at System.Windows.Controls.Primitives.ToggleButton.OnToggle()
   at Telerik.Windows.Controls.RadToggleButton.OnClick() in Telerik.Windows.Controls\RadToggleButton.cs:line 201
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at Telerik.Windows.Controls.RadToggleButton.OnMouseLeftButtonUp(MouseButtonEventArgs e) in Telerik.Windows.Controls\RadToggleButton.cs:line 231
   at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run()
   at RadSVGImageTest.App.Main()

Perhaps this combination of setters isn't possible? I've attached an example project. Any help is appreciated.

Thank You,

Giuliano

Buttons

SvgImage

asked on 10 Jun 2024

1 answer

89 views

Drag and Drop from RadListBox to RadGridView with RowDataTemplate

Hi,

I wanted to know if it is contemplated the possibility of drag and drop from a component such as the RadListBox for example to a RadGridView which has as RowDataTemplate another RadGridView. But, only allow to drag the activity of the RadListBox to the child RadGridView. How could I achieve that?

Thanks in advance.

<Window x:Class="ComponentesTestWPF.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
        xmlns:local="clr-namespace:ComponentesTestWPF"
        mc:Ignorable="d"
        Title="MainWindow">
    <Window.Resources>
        
        <!--Child grid (activities template)-->
        <DataTemplate x:Key="ChildTemplate">
            <Grid MaxWidth="800" HorizontalAlignment="Left" Margin="5">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="Auto" />
                </Grid.ColumnDefinitions>

                <telerik:RadButton Grid.Column="1" Width="25" Height="25" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="5,0,0,0" 
                                   Command="{Binding DataContext.Commands[DeleteCommand],RelativeSource={RelativeSource AncestorType=UserControl}}" 
                                   CommandParameter="{Binding }" ToolTipService.ToolTip="Delete">
                    <TextBlock Text="Delete"/>
                </telerik:RadButton>

                <telerik:RadGridView x:Name="ActiviesRadGridView" 
                                     Grid.Column="0" IsBusy="{Binding IsBusy}" ActionOnLostFocus="None" CanUserFreezeColumns="False" 
                                     SelectionMode="Single" MaxHeight="200" MinHeight="150" AutoGenerateColumns="False"
                                     ItemsSource="{Binding Activities, Mode=TwoWay}" 
                                     SelectedItem="{Binding SelectedActivity, RelativeSource={RelativeSource AncestorType=UserControl}, Mode=TwoWay}"
                                     FrozenColumnsSplitterVisibility="Collapsed" CanUserDeleteRows="True" NewRowPosition="None">

                    <telerik:RadGridView.RowStyle>
                        <Style TargetType="telerik:GridViewRow">
                            <Setter Property="telerik:DragDropManager.AllowDrag" Value="True" />
                        </Style>
                    </telerik:RadGridView.RowStyle>

                    <telerik:RadGridView.Columns>
                        <telerik:GridViewDataColumn DataMemberBinding="{Binding DescActivity}" Width="*" TextWrapping="Wrap" IsReadOnly="True"/>
                    </telerik:RadGridView.Columns>

                    <telerik:RadGridView.Resources >
                        <Style TargetType="telerik:GridViewRow" >
                            <Setter Property="AllowDrop" Value="True"/>
                            <Setter Property="telerik:DragDropManager.AllowDrag" Value="True"/>
                            <Setter Property="telerik:DragDropManager.AllowCapturedDrag" Value="True"/>
                        </Style>
                    </telerik:RadGridView.Resources>

                </telerik:RadGridView>

            </Grid>
        </DataTemplate>
    </Window.Resources>

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="Auto"/>
        </Grid.ColumnDefinitions>
        
        <!--Main grid (groups)-->
        <telerik:RadGridView x:Name="GroupsGridView"  Grid.Column="0"
                             SelectionMode="Extended" Margin="0,5,5,0" ActionOnLostFocus="None" CanUserFreezeColumns="False" 
                             ItemsSource="{Binding Group, Mode=TwoWay}" 
                             SelectedItem="{Binding SelectedGroup, Mode=TwoWay}"              
                             RowDetailsTemplate="{StaticResource ChildTemplate}" IsBusy="{Binding IsBusy}">

            <telerik:RadGridView.Columns>
                <telerik:GridViewToggleRowDetailsColumn ExpandMode="Multiple"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Description}" Width="*" TextWrapping="Wrap" IsReadOnly="True"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Quantity}" Width="Auto" TextWrapping="Wrap" IsReadOnly="True"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Info}" Width="Auto" TextWrapping="Wrap" IsReadOnly="True"/>
            </telerik:RadGridView.Columns>

            <telerik:RadGridView.Resources >
                <Style TargetType="telerik:GridViewRow" >
                    <Setter Property="AllowDrop" Value="False"/>
                    <Setter Property="telerik:DragDropManager.AllowDrag" Value="False"/>
                    <Setter Property="telerik:DragDropManager.AllowCapturedDrag" Value="False"/>
                </Style>
            </telerik:RadGridView.Resources>
            
        </telerik:RadGridView>

        <!--ListBox (activities)-->
        <telerik:RadListBox x:Name="ActivitiesListBox" Grid.Column="1" Width="200" ItemsSource="{Binding ActivitiesList}" />
        
    </Grid>
</Window>

DragAndDrop

GridView

answered on 10 Jun 2024

1 answer

163 views

Replacement for PDFDocumentSource?

I have a PDF file that's been imported into a MemoryStream object and now I need to display it using the Telerik UI for WPF pdfViewer control. The existing documentation says that you can create a PdfDocumentSource object and bind the pdfViewer.DocumentSource to that. However, either PdfDocumentSource no longer exists, or I can't figure out what the correct Namespace is.

I'm using TelerikUI for WPF v2024 Q2. However changelogs for 2020 (https://docs.telerik.com/devtools/wpf/controls/radpdfviewer/changes-and-backward-compatibility/backward-compatibility) say that:

Changed
Obsolete constructors of Telerik.Windows.Documents.Fixed.PdfDocumentSource:

PdfDocumentSource(Uri uri, FormatProviderSettings settings)
PdfDocumentSource(Stream stream, FormatProviderSettings settings)
What to do now
Use the overloads that accept Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.PdfImportSettings instead.

I've also read that there is some kind of merge going on trying to replace the previous PDF code with Telerik.Windows.Documents.Fixed . In any case, I can't seem to figure out how to go from a MemoryStream to something that the pdfViewer.DocumentSource likes.

Can anyone help with a very basic code sample to take a PDF as a memorystream and create something that pdfView.DocumentSource will accept? Thank you!

PDFViewer

answered on 07 Jun 2024