Questions on UI for WPF Forum

3 answers

449 views

Good day.

I am using a WatermarkTextBox inside a Grid. The WatermarkTextBox width depends on the Grid's width. I am using HorizontalAlignment="Stretch"

What is happening is when i input long text in my WatermarkTextBox, the textbox is growing. I don't want this to happen.

I can't set a fixed width for the WatermarkTextBox since I need it to adjust based on the Grid's width. I just want the textbox Not to grow when I input long text.

How can I achieve this?

Thank you.

WatermarkTextBox

answered on 29 Jul 2020

1 answer

249 views

Theme change (mouse over)

Hello,

i'm want to change mouse over event to disable in RadPanelBar. I tried several thinks on that topic, but nothing works. I tried this:

https://docs.telerik.com/devtools/wpf/styling-and-appearance/styling-apperance-editing-control-templates?_ga=2.187479073.827374626.1595174688-1718886426.1590775437

When i found component for changing (first i tried to RadButton). I'm change mouse over value property (setter) and nothing change. First i cannot found in Telerik.Windows.Controls.xaml , but i found it in Telerik.Windows.Controls.ConversationalUI.xaml . Pls do you have it some guide how to change it properly ?

Thanks for your time and i'm glad to see your answer.

General Discussions

answered on 28 Jul 2020

2 answers

338 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

149 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

889 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

157 views

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

158 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

942 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

330 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

142 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