Questions on UI for WPF Forum

2 answers

357 views

Possible to have status bar when using RadTabbedWindow with itemsource?

Hi

We have a RadTabbedWindow with tabs as itemsource. Is it possible to have a status bar at the bottom?

And whenI put in the statusbar-markup I get the error message "System.InvalidOperationException: 'Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead.'"

Just for laughs I have tried to add status bar to the user controls for the tabs as well, but it cant go there

<telerik:RadTabbedWindow

...
ItemsSource="{Binding WindowTabs}"
SelectedItem="{Binding SelectedWindowTab, Mode=TwoWay}">

<telerik:RadTabbedWindow.Resources>
...
</telerik:RadTabbedWindow.Resources>

<telerik:RadTabbedWindow.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding TabHeader}" Foreground="Black"/>
</DataTemplate>
</telerik:RadTabbedWindow.ItemTemplate>

<StatusBar Name="sbar" VerticalAlignment="Bottom" >
<StatusBarItem>
<TextBlock>Im a status bar!</TextBlock>
</StatusBarItem>
</StatusBar>
</telerik:RadTabbedWindow>

TabbedWindow

answered on 28 Jul 2020

3 answers

156 views

Very Slow Labels for ScatterAreaSeries RadCartesianChart

I have a chart showing only 3012 scatter area series. Each series is just a filled narrow bar that represents a frequency range, so there are only 2 data points for each series.

When I enable labels, it takes 38+ seconds to draw the chart. When I disable labels (ScatterAreaSeries.ShowLabels = false), it is less than 2 seconds.

Any ideas what is going on? I do have an isolated sample.

(I am running on 64-bit Win 10 with 2017.3.1018.45 (NoXaml)).

Thanks.

-John.

ChartView

answered on 28 Jul 2020

1 answer

906 views

Automatic scrolling for TreeView when node is expanded

Hi,

I am seeing that the wpf TreeView do not scroll automatically to show the expanded nodes, when I expand a node in the tree view(I have to scroll manually after expanding), So I want to achieve the behaviour in the gif that I attached. This was the default behaviour for my legacy winforms tree, but the wpf telerik:RadTreeView does not have that behaviour. How can I achieve that behaviour with wpf telerik:TreeView.

TreeView

answered on 28 Jul 2020

1 answer

182 views

[Solved] RadDiagram routing sample have different result (newbie)

Hello,

I have copied the Example 1 XAML code from

https://docs.telerik.com/devtools/wpf/controls/raddiagram/features/routing

but the result is not the one shown in Figure 1 of the same link, but the one in the attached image. What is the difference? I have tried changing the DiagramConstants.RoutingGridSize constant, but it does not solve the issue.

Someone can help me?

Thank you!

Diagram

answered on 28 Jul 2020

1 answer

186 views

Orthogonal connections with connection points.

All connections in my project should be orthogonal. I have two type of connection in my project.

Routed connections.
Connections with manually set connection points (“manual connections”).

I use: AStarRouter and WallOptimization = true.

Problem: When I move a shape with „manual connections", this connection is not orthogonal.
Question: Is there a way to keep connections orthogonal and keep connection points?

Diagram

answered on 27 Jul 2020

5 answers

973 views

RadDatePicker and UpdateSourceTrigger

Hi,

I have a RadDatePicker where i can type the date and also i select a date.

I have a save button which should become enabled the moment i change the date in date picker.

Problem is only when i change the date using datepicker, the save is getting triggered. If i type in a date, only when the datepicker is lost focus, save is getting enabled. I want the save to be enabled the moment i type in some text using keyboard in the datepicker text box.

I am using the following code and it is not working

SelectedDate

="{Binding Path=SampleDate,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"

Note: In WPF datepicker i have a "Text" property where the UpdateSourceTrigger works perfectly. Need a similar behavior in RadDatePicker also.

Also I am using MVVM model. So i need suggestions which does not require XAML.cs change. All i should do is within XAML.

I have pasted a sample code below. Just type in some valid date in WPF datepicker, button will be enabled. But the same button is not getting enabled if i type in a date in RadDatePicker. You might know better than me... I need the same behavior as like the WPF date picker. Please help

    
            <Window x:Class="DatePickerTextBoxSample.MainWindow" 
        
                    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" 
        
                    Title="MainWindow" Height="350" Width="525">  
        
                <Grid> 
        
                    <Button Name="SampleButton" Content="Click Here" Height="20" Width="150" HorizontalAlignment="Left" VerticalAlignment="Bottom" IsEnabled="{Binding Path=IsDateChanged,Mode=TwoWay}" Click="SampleButton_Click" /> 
        
                    <DatePicker Text="{Binding Path=WpfDatePickerDate,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Height="25" HorizontalAlignment="Left" Margin="118,218,0,0" Name="datePicker1" VerticalAlignment="Top" Width="115" /> 
        
                    <telerik:RadDatePicker SelectedDate="{Binding Path=RadDatePickerDate,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" Height="25" HorizontalAlignment="Left" Margin="250,218,0,0" Name="datePicker2" IsDropDownOpen="False" VerticalAlignment="Top" Width="115" /> 
        
                </Grid> 
        
            </Window>

    
            using System;  
        
            using System.Collections.Generic;  
        
            using System.Linq;  
        
            using System.Text;  
        
            using System.Windows;  
        
            using System.Windows.Controls;  
        
            using System.Windows.Data;  
        
            using System.Windows.Documents;  
        
            using System.Windows.Input;  
        
            using System.Windows.Media;  
        
            using System.Windows.Media.Imaging;  
        
            using System.Windows.Navigation;  
        
            using System.Windows.Shapes;  
        
            using System.ComponentModel;  
        
            namespace DatePickerTextBoxSample  
        
            {  
        
                /// <summary> 
        
                /// Interaction logic for MainWindow.xaml  
        
                /// </summary> 
        
                public partial class MainWindow : Window, INotifyPropertyChanged  
        
                {  
        
                    private DateTime radDatePickerDate;  
        
                    private DateTime wpfDatePickerDate;  
        
                    public DateTime WpfDatePickerDate  
        
                    {  
        
                        get { return wpfDatePickerDate; }  
        
                        set   
        
                        {   
        
                            wpfDatePickerDate = value;  
        
                            IsDateChanged = true;  
        
                            NotifyPropertyChanged("WpfDatePickerDate");  
        
                        }  
        
                    }  
        
                    private bool _isDateChanged;  
        
                    public bool IsDateChanged  
        
                    {  
        
                        get { return _isDateChanged; }  
        
                        set   
        
                        {   
        
                            _isDateChanged = value;  
        
                            NotifyPropertyChanged("IsDateChanged");  
        
                        }  
        
                    }  
        
                    public DateTime RadDatePickerDate   
        
                    {  
        
                        get  
        
                        {  
        
                            return radDatePickerDate;  
        
                        }  
        
                        set  
        
                        {  
        
                            wpfDatePickerDate = value;  
        
                            IsDateChanged = true;  
        
                            NotifyPropertyChanged("RadDatePickerDate");  
        
                        }  
        
                    }  
        
                    public MainWindow()  
        
                    {  
        
                        InitializeComponent();  
        
                        thisthis.DataContext = this;  
        
                    }  
        
                    #region INotifyPropertyChanged Members  
        
                    public event PropertyChangedEventHandler PropertyChanged;  
        
                    protected void NotifyPropertyChanged(String info)  
        
                    {  
        
                        if (PropertyChanged != null)  
        
                        {  
        
                            PropertyChanged(this, new PropertyChangedEventArgs(info));  
        
                        }  
        
                    }  
        
                    #endregion  
        
                    private void SampleButton_Click(object sender, RoutedEventArgs e)  
        
                    {  
        
                        SampleButton.IsEnabled = false;  
        
                    }  
        
                }  
        
            }

DatePicker

answered on 27 Jul 2020

5 answers

359 views

Detect if fluent scrollbar is normal or compact

Hi there,

I'd like to change the padding of my listbox on the right side depending on the 3 states of the vertical scrollbar (i.e collapsed, compact, normal).

Doing the following tweak allows me to change the padding when the vertical scrollbar is visible or not but I can't find how to change the padding based on the compact/normal mode state of the scrollbar.

<telerik:RadListBox.Style>

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

<Setter Property="Padding" Value="8,4" />

<Style.Triggers>

<Trigger Property="ScrollViewer.ComputedVerticalScrollBarVisibility" Value="Visible">

<Setter Property="Padding" Value="8,4,24,4" />

</Trigger>

</Style.Triggers>

</Style>

</telerik:RadListBox.Style>

General Discussions

answered on 24 Jul 2020

1 answer

146 views

GridViewSpreadStreamExportOptions missing ExcludedColumns

Hi!

According to the documentation for SpreadsheetStreamingExport there is a property "ExcludedColumns" in the class "GridViewSpreadStreamExportOptions". See here . This property is missing and only available in "GridViewDocumentExportOptions". I really miss this property badly because I have to exlude some columns when exporting. Is this a bug or error in documentation?

Best regards
Heiko

GridView

answered on 24 Jul 2020

3 answers

436 views

ApplicationCommands.Delete context menu is disabled

In the sample below, copy and paste will operate on the row as expected but delete is disabled. I'm expecting delete to allow me to delete the row (as if I pressed the delete key on the keyboard).

<telerik:RadGridView x:Name="RadGridView" >

<telerik:RadGridView.ContextMenu>

<ContextMenu >

<MenuItem Command="ApplicationCommands.Copy"></MenuItem>

<MenuItem Command="ApplicationCommands.Paste"></MenuItem>

<MenuItem Command="ApplicationCommands.Delete"></MenuItem>

</ContextMenu>

</telerik:RadGridView.ContextMenu>

</telerik:RadGridView>

public GridMenuTestWindow ()

{

InitializeComponent ();

ObservableCollection<MyData> dataList = new ObservableCollection<MyData> ();

for (int i = 0; i < 4; i++)

{

dataList.Add (new MyData () {Name = "Name" + i});

}

this.RadGridView.ItemsSource = dataList;

}

public class MyData

{

public String Name { get; set; }

}

GridView

answered on 24 Jul 2020

3 answers

373 views

Out of memory exception when cropping image

When I try to crop a large image (10 MB jpg), I always get an "Out of memory exception". I there a size limit for images?

Stack trace:

Exception of type 'System.OutOfMemoryException' was thrown.*   at Telerik.Windows.Media.Imaging.RadBitmap.GetPixels()
   at Telerik.Windows.Media.Imaging.RadBitmap.Crop(Int32 x, Int32 y, Int32 newWidth, Int32 newHeight)
   at Telerik.Windows.Media.Imaging.Commands.CropCommand.Execute(RadBitmap source, Object context)
   at Telerik.Windows.Media.Imaging.History.ImageHistory.Execute(IImageCommand command, Object context)
   at Telerik.Windows.Controls.RadImageEditor.ExecuteCommand(IImageCommand command, Object context)
   at Telerik.Windows.Controls.RadImageEditor.CommitTool(Boolean executeSameToolAfterCommit)
   at Telerik.Windows.Controls.RichTextBoxUI.Dialogs.ImageEditorDialog.OK_Click(Object sender, RoutedEventArgs e)
   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.RaiseEvent(RoutedEventArgs e)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at Telerik.Windows.Controls.RadButton.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   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.Window.ShowHelper(Object booleanBox)
   at System.Windows.Window.Show()
   at System.Windows.Window.ShowDialog()
   at Telerik.Windows.Controls.InternalWindow.WindowWithNoChromeWindowHost.Open(Boolean isModal)
   at Telerik.Windows.Controls.WindowBase.ShowWindow(Boolean isModal)
   at Telerik.Windows.Controls.RichTextBoxUI.Dialogs.ImageEditorDialog.ShowDialogInternal(Inline orgInline, Action`2 replaceCurrentImageCallback, String executeToolName, RadRichTextBox owner)
   at Telerik.Windows.Controls.RichTextBoxUI.Dialogs.ImageEditorDialog.ShowDialog(Inline selectedImage, Action`2 replaceCurrentImageCallback, String executeToolName, RadRichTextBox owner)
   at Telerik.Windows.Controls.RadRichTextBox.ShowImageEditorDialog(String executeToolName)
   at Telerik.Windows.Controls.RichTextBoxUI.ImageMiniToolBar.ExecuteShowImageEditor(Object param)
   at Telerik.Windows.Controls.DelegateCommand.Execute(Object parameter)
   at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at Telerik.Windows.Controls.RadButton.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   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.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at System.Windows.Application.Run()

...

ImageEditor

answered on 23 Jul 2020