Questions on UI for WPF Forum

1 answer

122 views

When does RadCarousel create its RadCarouselPanel?

I am attempting to get a reference to the RadCarouselPanel in my RadCarousel. I need to know when it is animating. But unless I wait for some sort of manual event (like a keyboard press) the panel is null.

First I tried adding a handler for the Carousel's Loaded event

<tk:RadCarousel x:Name="OtherScanGallery"

    ItemsSource="{Binding OtherScansView}"
    VerticalContentAlignment="Top"
    IsSynchronizedWithCurrentItem="True"
    IsVisibleChanged="OtherScanGallery_OnIsVisibleChanged"
    SelectionChanged="OtherScanGallery_OnSelectionChanged"
    Loaded="OtherScanGallery_OnLoaded"
    SelectedItem="{Binding ElementName=Root, Path=DataContext.SelectedOtherScan, Mode=TwoWay}"
    >

private void OtherScanGallery_OnLoaded(object sender, RoutedEventArgs e)
{
    RadCarouselPanel? panel = null;
    if (sender is not RadCarousel car)
        Log.Debug($"Gallery loaded but no carousel");
    elseif (null == (panel = car.FindCarouselPanel()))
         Log.Debug($"Gallery loaded but no panel");
    else
         Log.Debug($"Gallery fully loaded");
}

Unfortunately the second check fails here. FindCarouselPanel returns null. I guess this makes some sense since the carousel is initially not visible when my page is loaded. So I figured, maybe the carousel waits until it becomes visible to create it's panel

So then I tried to put in a handler for the carousel's IsVisibleChanged event. I figure the carousel will have to have created the panel by then, right?

private void OtherScanGallery_OnIsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
{
    var panel = OtherScanGallery.FindCarouselPanel();
    if (null == panel )
        Log.Error("No panel after visible changed.");
}

But no, wrong. The Panel returned here is still null

However If i then set up an event handler for... say... a keyboard event later on, at that point FindCarouselPanel returns a valid panel.

So what are the rules here? How do I determine definitively when the Carousel creates its panel?

Note: I am using The Windows8Touch theme in the binaries with XAML and the StyleManager. I have not created an sort of ControlTemplate for the carousel or its items. I am using the theme-provided ones

Carousel

answered on 19 Apr 2023

1 answer

149 views

Double click on RadRibbonView causes minimize with minimization enabled

Hi

Current scenario I am trying to fix is we are wanting to make use of the minimization feature, but disable the double click toggling the minimization. Limiting the minimization toggle to only the Minimize button (or a custom context menu).

I have tried using the PreviewMouseDoubleClick event which works at a first glance, however it ends up being that a triple click will now minimize.
Other less successful attempts are disabling minimization and only enable it before the ribbon would be minimized or un minimized. This would mean more control over when the ribbon is minimized but would require more effort in getting all aspects of the minimization working.

Any assistance would be appreciated. It doesnt feel like too complicated of a problem but struggling with it none the less

RibbonView and RibbonWindow

answered on 18 Apr 2023

1 answer

133 views

RadToolbar with windows11 theme

Hi,
I would like to use windows11 theme in my application, but when apply the theme every buttons in the toolbars are loaded of large padding and large margin.
Since I don't like this layout I can change it setting properties inside every button, but if I try to setting a style it is ignored.
I think that toolbar apply a style and overwrite my one.

Can I modify the layout without change every button in my application?

Thank you

Luigi

ToolBar

answered on 17 Apr 2023

1 answer

153 views

RadDocking Control Theme Override.

HI Team,

I wanted to override the theme of RadDocking Control.

I'm using DocumentHost and RadDocumentPane with properties IsDockable="False" CanFloat="False" CanUserClose="False" CanUserPin="False" but after that in the application Border is coming with thickness "2" .

I used snoop tool where if I set this thickness to 0 then border goes away but when I make changes in RadDockingDocument Style BorderLayer3 control to 0 it doesn't work .

Please help me to remove the border in case we use DocumentHost.

 <telerik:RadDocking.DocumentHost>
                <telerik:RadSplitContainer Margin="0,0,0,0" BorderThickness="0" Padding="0">
                    <telerik:RadPaneGroup BorderThickness="0" >
                        <telerik:RadDocumentPane Style="{StaticResource LayoutRadDocument}" PaneHeaderVisibility="Collapsed"  telerik:RadDocking.SerializationTag="AnotherDocPane" Background="Transparent" Margin="0,0,0,0" BorderThickness="0" Padding="0" Header="DocPane" Visibility="Collapsed" IsDockable="False" CanFloat="False"  ContextMenuTemplate="{x:Null}"  CanUserClose="False" CanUserPin="False">
                            <Grid x:Name="RighHandColumn">

Please look into the SS.

Docking

answered on 17 Apr 2023

0 answers

86 views

SelectedItemsBehavior Error

Hello!
I am using Telerik GridView control in WPF application.
I wanted to use the SelectedItems Binding for GridView according article "SelectedItemsBehavior fixes for crashes, changing DataContext" at https://www.telerik.com/forums/selecteditemsbehavior-fixes-for-crashes-changing-datacontext.
I downloaded the example from the link from github, but I had a problem: the downloaded example does not work...
After starting the programm, when trying to select a row, the application throws the error "cannot change ObservableCollection during a CollectionChanged event".
In the comments, one of the users wrote about this error, to which the author replied that he had updated the code on the github and now this error has been fixed. But I still get an error. How do I fix the "MySelectedItemsBindingBehavior" class to make it work?

GridView

asked on 14 Apr 2023

1 answer

182 views

Telerik Document Processing Libraries in a .NET 6 WPF

Is there a way to use Telerik Document Processing Libraries in a .NET 6 WPF project?

General Discussions

answered on 10 Apr 2023

1 answer

129 views

3D PDF content support in RadPdfViewer

Hi Team,

We are using RadPdfViewer in .net 6 WPF application. It is failing to load 3D PDF content. We found the very old thread about this feature from around 2013 and it says this feature is not supported. Is there any option to show the 3D content in latest PDF control or any plans to release this functionality in near future ?

Thanks in Advance.

PDFViewer

answered on 10 Apr 2023

0 answers

271 views

RadDateTimePicker not showing / missing

Hi.

I've tried to use RadDateTimePicker inside RadGridView, but datepicket is not showing (examle from: WPF DateTimePicker - How to use RadDateTimePicker in a Grid - Telerik UI for WPF). Tried to add control outside grid but without any effect.

Project is referenced to Telerik.Windows.Data.dll, Telerik.Windows.Controls, Telerik.Windows.Controls.Input, Telerik.Windows.Controls.GridView...

<Window x:Class="Test"
        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="Test" Height="450" Width="800">
    <Grid>
    
        <telerik:RadDateTimePicker                                 
                                InputMode="DatePicker"
                                telerik:DropDownButtonExtensions.FocusContentOnOpen="True"                              
                                SelectedValue="{Binding Established, Mode=TwoWay}"/>
        
        <telerik:RadGridView Name="radGridView" 
                     AutoGenerateColumns="False">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn Header="Name" 
                                    DataMemberBinding="{Binding Name}" />
                <telerik:GridViewDataColumn Header="Established" 
                                    DataMemberBinding="{Binding Established}">
                    <telerik:GridViewDataColumn.CellEditTemplate>
                        <DataTemplate>
                            <telerik:RadDateTimePicker                                 
                                InputMode="DatePicker"
                                telerik:DropDownButtonExtensions.FocusContentOnOpen="True"
                              
                                SelectedValue="{Binding Established, Mode=TwoWay}"/>
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellEditTemplate>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn Header="Stadium" 
                                    DataMemberBinding="{Binding StadiumCapacity}" 
                                    DataFormatString="{}{0:N0}" />
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>
</Window>

Data Virtualization

DateTimePicker

asked on 06 Apr 2023

1 answer

130 views

I'm having trouble entering Korean in the RichTextBox demo.

This issue seems to be happening in the latest version of Windows 11. (22H2 22621.1413)

This is not a problem with WPF native RichTextBox controls.

RichTextBox

answered on 06 Apr 2023

0 answers

179 views

Wrong position of ToolTip of Material Theme

Hello, everyone,

I found different acts of ToolTip in different computers, the tooltip will drift to the left a little in some computers. Do you have any clue about the reason? How can we solve this? Is there any configuration of computer system we should adjust?

ToolTip

updated question on 06 Apr 2023