Questions on UI for WPF Forum

3 answers

141 views

Hi,

I have a problem with visualizating images, which was signed by component (SecureBlackBox).
The final document (which is signed by this component) has image, which is shown vertically mirrored in Telerik component RadPdfViewer as shown in attached file "current.png". I am currently using version 2018.2.1912.45.

In any other pdf viewer (webBrowser, acrobat reader) it looks normal. In newest version of "Demos - Telerik UI for WPF" the PDFViewer showing created pdf normally too, shown in attached file: "demo.png".

PS: I don't know, if it has anything to do with it, but it seems widget, which is connected to created PDF, is using transformation matrix (MatrixPosition) which has attribute hasInverse set on True. But it seems like the value of this matrix doesn't change anything.

I wanted to ask, if this problem was solved/patched in newer version then 2018.2 or If is there some property which is managing this kind of behaviour?

Thanks.

Best regards
Martin.

PDFViewer

answered on 13 Oct 2020

3 answers

184 views

Not able to make GridViewComboBoxColumn editing to work

The requirement is to have a dropdown of string collection which can be different from row to row. So I used ItemsSourceBinding according to the document. But the combox didn't show up when I clicked the cell.

<telerik:GridViewComboBoxColumn Header="Reason"
DataMemberBinding="{Binding MyReason}"
HeaderCellStyle="{StaticResource GridHeaderStyle}"
ItemsSourceBinding="{Binding ValidReasons}"
IsComboBoxEditable="True"
EditTriggers="CurrentCellClick"
IsReadOnly="False"
GroupMemberPath="Check"
/>

"GroupMemberPath" was there before. I added "IsComboBoxEditable", "EditTriggers" and "IsReadOnly" and found nothing changed. I assumed that IsComboBoxEditable can be used if the reason is not found in "ValidReasons".

GridView

answered on 13 Oct 2020

3 answers

619 views

"The property ... is not a Dependency Property" After Upgrading Assemblies

Hello,

I updated to the newest version of Telerik UI for WPF last Friday, and ever since I have been receiving this issue. Any control where I set a property for a GridView, or some GridView component, using a style, I now receive this error:

"The property 'CanUserSelectColumns' is not a DependencyProperty. To be used in markup, non-attached properties must be exposed on the target type with an accessible instance property 'CanUserSelectColumns'. For attached properties, the declaring type must provide static 'GetCanUserSelectColumns' and 'SetCanUserSelectColumns' methods."

This error occurs even when I set styles on GridViewCell, but not all GridView components. See attached images for example. The project still builds and runs correctly, but this prevents me from using the designer, and also adds a lot of noise to my errors list.

Please let me know if there is a solution.

Thanks

GridView

answered on 13 Oct 2020

7 answers

816 views

SelectedItem binding issue

Hello,

We are using RadListBox as part of UserControl. Control consists of couple of data templates one of which contains list box:

<telerik:RadListBox Grid.Row="2" x:Name="DocumentListBox" ItemsSource="{Binding ItemsView}" BorderThickness="0"

ItemTemplateSelector="{Binding TemplateSelector}"

SelectedItem="{Binding SelectedItem, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

Background="Transparent"

HorizontalContentAlignment="Stretch"

SelectionMode="Single"

ScrollViewer.VerticalScrollBarVisibility="Auto"

ScrollViewer.HorizontalScrollBarVisibility="Disabled"

ScrollViewer.IsDeferredScrollingEnabled="{Binding IsDeferredScrollingEnabled}">

<telerik:EventToCommandBehavior.EventBindings>

<telerik:EventBinding EventName="MouseDoubleClick" Command="{Binding OpenItemCommand}" CommandParameter="{Binding SelectedItem}"/>

</telerik:EventToCommandBehavior.EventBindings>

<telerik:RadListBox.ItemContainerStyle>

<Style TargetType="telerik:RadListBoxItem" BasedOn="{StaticResource {x:Type telerik:RadListBoxItem}}">

<EventSetter Event="MouseMove" Handler="DocumentListBox_OnMouseMove"/>

</Style>

</telerik:RadListBox.ItemContainerStyle>

<telerik:RadListBox.InputBindings>

<KeyBinding Key="Delete" Command="{Binding DeleteItemCommand}" CommandParameter="{Binding SelectedItem}"/>

<KeyBinding Modifiers="Control" Key="O" Command="{Binding OpenItemCommand}" CommandParameter="{Binding SelectedItem}"/>

</telerik:RadListBox.InputBindings>

</telerik:RadListBox>

Control always used with the same view model. Most of the times SelectedItem binding works fine. But in two places it doesn't.

There is no binding related errors in the output, RadListBox is correctly populated with items and RadListBox.SelectedItem has correct value.

But in this two problematic cases SelectedItem property of the view model does not get updated.

We suspect that the problem might have something to do with the initialization order, but could not detect any specific pattern.

In one case the control used in the tab in the other in dialog window.

ListBox

answered on 12 Oct 2020

0 answers

143 views

Floating Dockable RadPane misplaced dock indicators on multiple screens [WPF host edition]

Hello!

I have similar, but slightly different scenario for misplaced dock indicators. Similar to https://www.telerik.com/forums/wrong-rootcompass-indicators-location, but in my case the host process is also WPF application that have ContentPresenter with content from another WPF process.

I've tried to implement IWindowInteropabilityAdapter, but it's properties are not being read at all.

Attaching Adapter

View = FrameworkElementAdapters.ContractToViewAdapter(_remoteProcess.RemotePlugin.Contract);

WindowInteropabilityHelper.SetWindowInteropabilityAdapter(View,

new WindowInteropabilityAdapter(App.Current.MainWindow));

//or App.Current.MainWindow.FindChildByType<ContentPresenter>()

Host Main Window xaml

<Window >

<AdornerDecorator>

<DockPanel>

<ContentPresenter Content="{Binding PluginService.SelectedPlugin.View}" />

</DockPanel>

</AdornerDecorator>

</Window>

I also tried to look at OnPreviewShowCompass(PreviewShowCompassEventArgs args) on child process RadDocking, because I can track main app to know that it was moved to the other screen, I'm able to have screen handle and screen dimensions, but I have no clue how to correct Compass placement even with all that information.

Is there anything I got missing, done wrong or could change to make it work as expected?

Docking

asked on 09 Oct 2020

5 answers

128 views

SeletectedItem does not consistently populate when control loses focus

I have a few AutocompleteBoxes databound to some objects (standard MVVM pattern).

If I make a selection, then press the Tab key, the objects are updated just fine.

If I just click to another control, they are not. The lose focus event is fired, but the Selecteditems is null.

Is there a way to make this work properly?

AutoCompleteBox

answered on 09 Oct 2020

3 answers

112 views

Agenda View - Columns for Ressources

Good day,

i would like to achieve something like the Agenda View with Columns for each "Resource". eg:

Person 1 | Person 2 | Person 3 | ....

Monday

Tuesday

Wednesday

....

Is this possible? Could you please point me in de right direction?

Thank you for your time and help!

Best regards
Jürgen

ScheduleView

answered on 09 Oct 2020

10 answers

537 views

Floating RadPane (ToolWindow) in windows taskbar?

Is it possible to show the floating RadPane in the windows taskbar with the other application windows? I was looking through documentation and couldn't find a way to do this.

I know the floating windows come to the front when the application window is focused, but wondered if that was the desired functionality instead of having them in the taskbar.

Docking