Questions on UI for WPF Forum

5 answers

193 views

Horizontal Orientation inside TileListPanel

Hello Telerik Team,

I'm trying to change the orientation of my tiles within a group from vertical default orientation to horizontal orientation.

I already created a class derived from TileListPanel overriding the default orientation:

public class CustomTileListPanel : TileListPanel

{

protected override bool HasLogicalOrientation { get { return true; } }

protected override Orientation LogicalOrientation { get { return Orientation.Horizontal; } }

}

But unfortunately this has no effect.

Please tell me how I can change the orientation of the tiles.

Regards,

Johannes

TileList

answered on 29 Jan 2021

5 answers

288 views

Navigation hierarchy Item Shortcut ???

Hello.

I'm trying to use a shortcut key for an item in the navigation child.

It was successful until the view was opened by generating a command by receiving a gesture by key binding.

However, it is not a choice for navigation items.

I set the navigation index, but it didn't work.

Is there a way to open the upper layer and select the lower layer?

Thanks.

NavigationView (Hamburger Menu)

answered on 29 Jan 2021

11 answers

678 views

Hide/Collapse tab strip in RibbonView

Is there a way to hide the RibbonTab strip when contained within a RibbonView?

When previously using the RibbonBar, setting HeaderVisibility="Collapsed" in the RibbonTab would hide the tab strip entirely. In the RibbonView, this functionality appears to be absent. Is there a workaround to get the same effect?

RibbonView and RibbonWindow

answered on 28 Jan 2021

3 answers

81 views

TabControl.Item unhandled exception error

Hello,

The application I am working on is throwing the following unhandled exception whenever I attempt to identify a TabControl WPF object using my automation tool. This issue started occurring when we upgraded our Telerik libraries from Library v2012.3.1129.40 to v2012.1.326.402. We are using HP QTP to automate our testing.

When I try to access the TabControl I get the following unhandled exception:

System.Reflection.TargetInvocationException was unhandled
Message=Exception has been thrown by the target of an invocation.
Source=mscorlib
StackTrace:
       at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
       at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
       at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
       at System.Delegate.DynamicInvokeImpl(Object[] args)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.DispatcherOperation.InvokeImpl()
       at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
       at System.Threading.ExecutionContext.runTryCode(Object userData)
       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Windows.Threading.DispatcherOperation.Invoke()
       at System.Windows.Threading.Dispatcher.ProcessQueue()
       at System.Windows.Threading.Dispatcher.WndProcHook(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 MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.InvokeImpl(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.Application.RunDispatcher(Object ignore)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run(Window window)
       at System.Windows.Application.Run()
       at PM.Live.Client.App.Main() in C:\pl\Source\PM\PM.Live.Client\obj\Debug\App.g.cs:line 0
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.MissingMethodException
       Message=Method 'PM.Live.Client.Common.Controls.TertiaryTabControl.Item' not found.
       Source=mscorlib
       StackTrace:
            at System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams)
            at Mercury.WpfAgent.DispWrapper.DispThreadInvoke(String name, BindingFlags invokeAttr, Binder binder, Object obj, Object[] UnWrappedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParameters)
       InnerException:

I have had a similar issue with an Telerik.Windows.Automation.Peers.GridViewGroupPanelAutomationPeer.GetChildrenCore() which was resolved in internal build version 2012.3.1314. Is this too related to the Automation class change from the last quarterly build? Will there be a fix provided for this issue as well?

Regards,

Mike

TabControl

answered on 27 Jan 2021

2 answers

252 views

Labels not udpdated on chartview with label binding

Hi,

I've created a ChartView with a label bindind based on the code that I've found here https://www.telerik.com/forums/categoricalaxis-set-the-label-from-a-datapoint-dataitem.

My problem is that I'm not able to have the label updated when I change the set of data. The graphic is correctly updated but not the label.
I suspect an issue around the Attached Propery but I'm not able to find where is my issue. Is a way to force the update of the AxisLabel ?

Here is the code that I've changed in the code found in the previous link.

Thanks for your help.

<Window x:Class="Label_Binding.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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns:local="clr-namespace:Label_Binding"

mc:Ignorable="d"

Title="MainWindow" >

<Grid>

<Grid.RowDefinitions>

<RowDefinition/>

<RowDefinition Height="20"/>

</Grid.RowDefinitions>

<telerik:RadCartesianChart Grid.Row="0">

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:CategoricalAxis >

<telerik:CategoricalAxis.LabelTemplate>

<DataTemplate>

<StackPanel Orientation="Vertical">

<telerik:Label local:ChartUtilities.AxisLabelContent="{Binding}" />

</StackPanel>

</DataTemplate>

</telerik:CategoricalAxis.LabelTemplate>

</telerik:CategoricalAxis>

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis Minimum="0" Maximum="100" MajorStep="20" />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.Series>

<telerik:BarSeries CategoryBinding="Category" ValueBinding="Level" ItemsSource="{Binding FilteredData}" CombineMode="Stack">

<telerik:BarSeries.PointTemplate>

<DataTemplate>

<Rectangle Fill="{Binding DataItem.FillColor}"/>

</DataTemplate>

</telerik:BarSeries.PointTemplate>

</telerik:BarSeries>

<!--<telerik:StepLineSeries CategoryBinding="Category" ValueBinding="MaxLevel" ItemsSource="{Binding OctaveData}" ShowLabels="True" Stroke="DarkGray" />-->

</telerik:RadCartesianChart.Series>

</telerik:RadCartesianChart>

<telerik:RadButton Grid.Row="1" Content="Change Source" Click="RadButton_Click"/>

</Grid>

</Window>

using System.Windows;

namespace Label_Binding

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

ViewModel vm;

public MainWindow()

{

InitializeComponent();

this.DataContext = vm = new ViewModel();

}

private void RadButton_Click(object sender, RoutedEventArgs e)

{

vm.ChangeData();

}

using System;

using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.ComponentModel;

using System.Linq;

using System.Windows.Media;

namespace Label_Binding

{

public class ViewModel : INotifyPropertyChanged

{

public ObservableCollection<ChartData> Data { get; set; }

public IEnumerable<ChartData> FilteredData { get; set; }

Random rnd = new Random();

private Boolean isChanged;

public event PropertyChangedEventHandler PropertyChanged;

private void RaisePropertyChanged(string propertyName)

{

if (this.PropertyChanged != null)

this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));

}

public ViewModel()

{

Data = new ObservableCollection<ChartData>();

GetData();

isChanged = false;

FilteredData = Data.Where(n => n.Index < 5);

}

public void ChangeData()

{

if (!isChanged)

{

FilteredData = Data.Where(n => n.Index >= 5);

}

else

{

FilteredData = Data.Where(n => n.Index < 5);

}

isChanged = !isChanged;

RaisePropertyChanged("FilteredData");

}

private void GetData()

{

for (int i = 0; i < 5; i++)

{

ChartData point = new ChartData();

point.Index = i;

point.Category = "Cat "+i;

point.Average = rnd.Next(10,60);

point.Level = rnd.Next(10,60);

point.FillColor = new SolidColorBrush(Colors.Bisque);

Data.Add(point);

}

for (int i = 0; i < 5; i++)

{

ChartData point = new ChartData();

point.Index = i + 5;

point.Category = "Cat " + i;

point.Average = rnd.Next(10, 60);

point.Level = rnd.Next(10, 60);

point.FillColor = new SolidColorBrush(Colors.Bisque);

Data.Add(point);

}

ChartView

answered on 27 Jan 2021

1 answer

250 views

How to extract Theme settings when using XAML.DLL / StyleManager?

Is there a way to extract active theme settings from the StyleManager?

Cheers, Rob.

General Discussions

answered on 27 Jan 2021

2 answers

263 views

Styling tabitem

I am trying to change the selected tab's background color. I've managed to do this the following code, but when i run the project, I can't select any tabs at all. Nothing happens when I click a tab.

<Window.Resources>

<Style TargetType="{x:Type telerik:RadTabItem}">

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="{x:Type telerik:RadTabItem}">

<Grid >

<Border

Name="Border"

Background="LightBlue"

BorderBrush="Black"

BorderThickness="1,1,1,1"

CornerRadius="6,6,0,0" >

<ContentPresenter x:Name="ContentSite" Margin="12,2,12,2" VerticalAlignment="Center" HorizontalAlignment="Center" ContentSource="Header"/>

</Border>

</Grid>

<ControlTemplate.Triggers>

<Trigger Property="IsSelected" Value="True">

<Setter TargetName="Border" Property="Background" Value="LightBlue" />

</Trigger>

<Trigger Property="IsSelected" Value="False">

<Setter TargetName="Border" Property="Background" Value="LightGray" />

</Trigger>

</ControlTemplate.Triggers>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

</Window.Resources>

TabControl

answered on 27 Jan 2021

6 answers

307 views

ArgumentNullException in GetValidationErrors

Hello

Do I get it right, that when I receive following exception, that means that somewhere my ```INotifyDataErrorInfo.GetErrors``` returns null instead of empty list?

```

System.ArgumentNullException: Value cannot be null.
Parameter name: collection
   at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
   at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection)
   at Telerik.Windows.Controls.GridViewBoundColumnBase.GetDataErrorValidationErrors(Object dataItem, String propertyName, GridViewValidationType gridViewValidationType)
   at Telerik.Windows.Controls.GridViewBoundColumnBase.GetValidationErrors(Object dataItem, String propertyName)
   at Telerik.Windows.Controls.GridView.GridViewCell.GetDataErrors()
   at Telerik.Windows.Controls.GridView.GridViewCell.UpdateIsValidState()
   at Telerik.Windows.Controls.GridView.GridViewDataControl.Telerik.Windows.Data.IWeakEventListener<System.ComponentModel.DataErrorsChangedEventArgs>.ReceiveWeakEvent(Object sender, DataErrorsChangedEventArgs args)
   at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
   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)

```

GridView

answered on 27 Jan 2021

2 answers

245 views

Setting TextAlignment of GridViewExpressionColumn at Runtime

Hi

I'm attempting to set the TextAlignment property of a GridViewExpressionColumn at runtime. The property is set correctly but the change is not reflected in the grid. The same change to a GridViewDataColumn works as I would expect - the alignment is set visually on the screen straight away.

var col = this.RadGridView.Columns[0];

col.TextAlignment = TextAlignment.Right;

I have found that it the column is removed and re-inserted it will work correctly:

var col = this.RadGridView.Columns[0];

this.RadGridView.Columns.Remove(col);

col.TextAlignment = TextAlignment.Right;

this.RadGridView.Columns.Insert(0, col);

Is this a bug? Or am I missing something?

Regards

Dave

GridView