Questions on UI for WPF Forum

3 answers

249 views

Hi,

I am using a Timeline to show and edit Employee shift times (see attachment).

The user is able to use the TAB key to go through every Time in order and works great until the schedule is scrolled.

Once the user scrolls the schedule the TAB order is random and takes the user to random employees / days.

I am guessing this has got to do with virtualization and container reuse in the control.

Is there a way to turn off virtualization? My data set will always be small so the users will be able to cope with a less responsive control if they can use the TAB key properly.

Thanks
Anthony

ScheduleView

answered on 16 Dec 2014

1 answer

197 views

Default Save Format Param

Hi,

How to show the default file format as pdf clicking the save button in RadRichTextBox Ribbon Bar?
Perhaps a parameter in the SaveCommand?

Thanks,
marc.

RichTextBox

answered on 16 Dec 2014

4 answers

143 views

TabControl ScrollViewer_MouseWheel unhandled exception

Hi guys,
my application recently logged the following unhandled exception.
It happened just once and I'm unable to reproduce it, but looking at the stacktrace it seems an invalid cast on the RadTabControl.ScrollViewer_MouseWheel.

I never subscribe to that event so I'm assuming it's something related to RadTabControl internal implementation...
Can you have a look at it?

Thanks

Manuel

<SerializableException xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ExtendedInformation>
<HResult>-2146233079</HResult>
</ExtendedInformation>
<Message>'System.Windows.Documents.Hyperlink' is not a Visual or Visual3D.</Message>
<Source>PresentationCore</Source>
<StackTrace> at MS.Internal.Media.VisualTreeUtils.AsVisual(DependencyObject element, Visual& visual, Visual3D& visual3D)

at Telerik.Windows.Controls.RadTabControl.ScrollViewer_MouseWheel(Object sender, MouseWheelEventArgs e)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
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.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 MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
</StackTrace>
<TargetSite>Void AsVisual(System.Windows.DependencyObject, System.Windows.Media.Visual ByRef, System.Windows.Media.Media3D.Visual3D ByRef) @ MS.Internal.Media.VisualTreeUtils</TargetSite>
<Type>System.InvalidOperationException</Type>
</SerializableException>

TabControl

answered on 16 Dec 2014

8 answers

168 views

Grouping and UI Virtualization

Hi,

We are using WPF RadGridView in our screen.
We notice that the screens which have RadGridView without grouping perform better but the screens where grouping is enabled take a long time to load.
Our best guess is that UI virtualization is not happening for RadGridView with grouping enabled.

Is UI Virtualization turned off when grouping is enabled? If yes, please suggest an alternative way to improve performance.

Thanks.

GridView

answered on 16 Dec 2014

3 answers

422 views

GridViewCell ControlTemplate binding

Hello,
i have a controltemplate for GridViewCell and I'm having some problems with its binding.
First of all when i used: (the column is binded to Price)

    
            Text="{Binding Path=Content.Field.Value}"

The value disapears from the cell when the row is selected.

Then i tried:

    
            Text="{Binding Path=DataContext.Price, Mode=TwoWay, Converter = {StaticResource CentPriceConverter}, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewRow}}}"

but this way the value in the source object is not updated. the setter is called with the old value

can you tell what I'm doing wrong?

my controlTemplate looks like this:

    
                            <ControlTemplate x:Key="PriceExpandedCell" TargetType="telerik:GridViewCell">  
        
                                <Border Name="Part_Border"   
        
                                        CornerRadius="0"   
        
                                        Loaded="Part_Border_Loaded" 
        
                                        Height="Auto" 
        
                                        BorderBrush="{StaticResource SolidBorderBrush}" 
        
                                        VerticalAlignment="Stretch">  
        
                                    <StackPanel Name="Part_StackPanel"   
        
                                                ScrollViewer.VerticalScrollBarVisibility="Hidden" 
        
                                                Orientation="Vertical" 
        
                                                Background="{Binding Path=Background, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewRow}}}">  
        
                                        <TextBox Name="Part_Text"    
        
                                                 Width="Auto"   
        
                                                 BorderThickness="0" 
        
                                                 Background="Transparent" 
        
                                                 Margin="2,2,2,2"   
        
                                                 TextChanged="Part_Text_TextChanged" 
        
                                                 Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewRow}}}" 
        
                                                 Text="{Binding Path=DataContext.Price, Mode=TwoWay, Converter = {StaticResource CentPriceConverter},   
        
                                            RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewRow}}}"/> 
        
                                        <Button Content="Discount" Margin="15,3,3,3"   
        
                                                Name="btnDiscount" 
        
                                                Click="btnDiscount_Click" 
        
                                                HorizontalAlignment="Left" 
        
                                                Style="{StaticResource CompactButton}"/>  
        
                                    </StackPanel> 
        
                                </Border> 
        
                                <ControlTemplate.Triggers> 
        
                                    <DataTrigger Binding="{Binding Path=IsSelected, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewRow}}}" Value="True">  
        
                                        <Setter TargetName="Part_StackPanel" Property="Background" Value="{StaticResource HighlightGradientBrush}"/>  
        
                                    </DataTrigger> 
        
                                    <Trigger Property="IsInEditMode" Value="True">  
        
                                        <Setter TargetName="Part_Border" Property="BorderThickness" Value="3"/>  
        
                                        <Setter TargetName="Part_StackPanel" Property="Background" Value="{StaticResource LightBlueBrush}"/>  
        
                                    </Trigger> 
        
                                </ControlTemplate.Triggers> 
        
                            </ControlTemplate>

Thanks!

GridView

answered on 16 Dec 2014

1 answer

223 views

[Solved] WPF & Prism.

Hello,

Could you please point me to a working code of WPF (that uses a ribbon view similar to Microsoft word) and using PRISM (and unity or MEF). Thanks.

-Jayanth

General Discussions

answered on 16 Dec 2014

8 answers

453 views

Bind RibbonTab to Command

Hello!
How to bind the radribbon tab to a command?
like ... <RadRibbonTab Command="{Binding MyCommand}"...>

Thanks.

RibbonView and RibbonWindow

answered on 15 Dec 2014

2 answers

137 views

Determine if upload is in progress

Is there a property that I can reliably use to determine if the CloudUpload is currently working on 1 or more uploads? I suppose I could subscribe to one of the events and set a custom property if not.

CloudUpload

answered on 15 Dec 2014

1 answer

157 views

Root Node suppression/filter?

Hello, I'm setting up a windows explorer tree view and when it displays, I get a header node then C: then Folder then File. How can I suppress the Header and drive letter so the first node starts with a sub-folder? I can't find an event to filter as it's creating the node structure.

attached in yellow are the two nodes I would like to remove on initialization of the control.

thanks.

TreeView

answered on 15 Dec 2014

1 answer

153 views

Access elements inside of a page

Hi
I'm trying to using RadBook control to display a PDF file and also a custom control named DrawingCanvas to draw some shapes over the PDF file loaded.
I've done this successfully thanks to the vast amount of samples available.
Here is how I do:

I load the file as follows:

private void LoadFile(String filePath)

{

documentStream = new FileStream(filePath, FileMode.Open);

var doc = new PdfFormatProvider(documentStream, FormatProviderSettings.ReadOnDemand).Import();

book.ItemsSource = doc.Pages;

}

And here is the DataTemplate which I use:

<DataTemplate x:Key="PageTemplate">

<Viewbox>

<Grid>

<ui:FixedDocumentSinglePagePresenter Page="{Binding}" Width="500" Height="500"/>

<hosts:DrawingCanvas Width="500" Height="500" Margin="15" Background="#00000000" />

</Grid>

</Viewbox>

</DataTemplate>

And everything works great.
My problem is that, when the page is changed (on PageChanged event), I want to access the DrawingCanvas!
I tries the 2 approaches mentioned in this post How to access controls in RadBook DataTemplete?, but it doesn't help me.
When using the loaded event, I have 2 problems:

When paging back, the events (sometimes) does not raise!
It seems the RadBook caches the pages, so while RightPageIndex is 0, I get events of canvases in page 1 and 2.

And when trying to use the RadBook.ItemContainerGenerator the problem is that myBook.ItemContainerGenerator.ContainerFromIndex(leftPageInd) returns null,
and I also tried to use the book.Items property, but my Items type are RadFixedPage (because I've set ItemsSource of book to PdfFormatProvider's Pages property) and I don't know how can I use it to get my DrawingCanvas.

Regards, Vahid

Book

answered on 15 Dec 2014