Questions on UI for WPF Forum

3 answers

329 views

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

171 views

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

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answered on 16 Dec 2014

8 answers

366 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

87 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.

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answered on 15 Dec 2014

1 answer

111 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

106 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

2 answers

945 views

Override Background Colour with a Style

I am attempting to set a style for the RadWatermarkTextbox as follows;

<Style TargetType="telerik:RadWatermarkTextBox" x:Key="RadWatermark">

<Style.Triggers>

<DataTrigger Binding="{Binding Path=IsActive}" Value="False">

<Setter Property="TextBlock.Foreground" Value="Red"/>

<Setter Property="TextBlock.Background" Value="LightYellow" />

</DataTrigger>

</Style.Triggers>

</Style>

The foreground colour changers to red but the background appears grey. I haver tried various opacity settings and also;

<Style TargetType="telerik:RadWatermarkTextBox" x:Key="RadWatermark">

<Style.Triggers>

<DataTrigger Binding="{Binding Path=IsActive}" Value="False">

<Setter Property="TextBlock.Foreground" Value="Red"/>

<Setter Property="TextBlock.Background" Value="LightYellow" />

<Setter Property="Background" Value="LightYellow" />

</DataTrigger>

</Style.Triggers>

</Style>

but the best I seem to get is a dirty-yellow background.

How do I override the default "battleship grey"?

WatermarkTextBox

answered on 15 Dec 2014

2 answers

131 views

Force sorting of colums

We have a grid with its ItemsSource bound to a QCV (and an EF query as source). There has to be a sorted column so that Paging works properly. However, I can also completely remove a sort which means paging is no longer working. How can I prevent the user from "un-sorting" a column? What I would like to have is instead of a threestate sorting (asc, desc, unsorted) only a twostate sorting (asc, desc). Any idea?

Regards
Neils

GridView

answered on 14 Dec 2014

4 answers

173 views

Copy e Paste TableCell

Hi,

In a separate thread (so I can't access RadRichTextBox object) I manipulate a RadDocument.
Now, I want to copy the TableCell "source" into the TableCell "destination"

For the style and options I use:

destination.CopyPropertiesFrom(source);

For the content I use:

foreach (Block b in source.Blocks)

destination.Blocks.Add((Block)b.CreateDeepCopy());

All work good but, then CreateDeepCopy method generates a document that is not possible to export as pdf.
Workarounds?

Thank,
marc.

RichTextBox

answered on 13 Dec 2014

7 answers

138 views

Set CurrentItem of GridView to embedded RadButton row

Hello,

Could you please specify how can a button placed in the CellTemplate tag of a GridViewDataColumn (1) map the row in which the button is placed at click?
In my implementation, I need to embed buttons in each row of a specific column in order to remove those rows. The button is bound to a command which removes the CurrentItem from the ListCollectionView bound to the GridView (2).
However, clicking the embedded button doesn't mark its row as the selected one and the command removes the row which is marked as Selected in the GridView (by clicking on one of the columns which don't embed the mentioned button).
In conclusion, the button is supposed to mark its row as selected when clikcked, in order for the bound Command to remove the desired row, without having to click on the row (thus selecting it) and then click on the button.

GridView

answered on 12 Dec 2014