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Resize WPF TextBlock with WrapWithOverflow

I have a textblock on a window which is contained in a scroll viewer. For the textlblock I have set the text wrapping to "WrapWithOverflow". In addition I bound the textblock width property to the actual width of the scroll viewer.
My desired behavior is, that I can resize my window and the textblock should wrap the content. The window should only show the scrollbars when other controls (e.g. the buttons in the example xaml get cut)
Xaml:
<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<DockPanel Margin="5">
<StackPanel DockPanel.Dock="Top" Orientation="Horizontal">
<Button Content="First Button" Margin="0,0,10,0"/>
<Button Content="Second Button"/>
</StackPanel>
<DockPanel>
<TextBlock VerticalAlignment="Center" IsHitTestVisible="False" TextAlignment="Center" TextWrapping="WrapWithOverflow"
Width="{Binding RelativeSource={RelativeSource AncestorType=ScrollViewer}, Path=ActualWidth}" MaxWidth="260">
Just a small line<LineBreak />
This is the long line which will wrap during resize</TextBlock>
</DockPanel>
</DockPanel>
</ScrollViewer>
But I see the scroll bars even befor the buttons get cut. I guess this is because of the margin in the dockpanel which is required in my case.

I guess this is because of the margin in the dockpanel
Correct.
...which is required in my case.
Why? You should move the Margin to the StackPanel:
<DockPanel>
<StackPanel DockPanel.Dock="Top" Orientation="Horizontal" Margin="5">
...
...or the buttons:
<DockPanel>
<StackPanel DockPanel.Dock="Top" Orientation="Horizontal">
<Button Content="First Button" Margin="5,5,5,5"/>
<Button Content="Second Button" Margin="5,5,0,5"/>
</StackPanel>
...
This is necessary as the margins are included in the ActualWidth that you bind to.

Making a Scrollviewer fill the available space in a DockPanel

I somewhat of a WPF noob and am using a DockPanel to display the text content of an email in a TextBox in a ScrollViewer. The panel has a button bar and area for the email headers at the top, a button bar at the bottom, a panel at the right and the email itself should fill the remaining space dynamically:
[Banner at top, below which is a button bar and box with email headers. At the bottom is another full width button bar. The space between them is divided into a fixed-width panel at the right and a large text box for the email contents.]
http://rowlandsoftware.com/Screenshots/LongEmail.png
(The DockPanel sits inside a grid that provides the bit at the very top and is used when the email is not visible.)
The problem is that if the email is too short or too narrow, the textbox fails to fill the remaining width. In this screenshot, you can see some of the underlying stuff between the box and the panel:
[Between the text box and the panel is a column that is not filled. Part of what lies under it can be seen.]
http://rowlandsoftware.com/Screenshots/TooNarrow.png
The XAML is:
<DockPanel x:Name="EmailCanvas" Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2" Visibility="Collapsed" Height="Auto">
<DockPanel x:Name="topButtonBar" DockPanel.Dock="Top" Height="50" Background="White">
<Button x:Name="btnReturn" DockPanel.Dock="Left" Content="Return to List" Click="btnReturn_Click" />
<Image Width="15" Source="Images/transparent.png" />
<Button x:Name="btnTextToggle" Content="Plain text" Click="btnTextToggle_Click" />
<Button x:Name="btnZoomOut" Content="Zoom Out" />
<Button x:Name="btnZoomIn" Content="Zoom In" />
<Image Width="150" DockPanel.Dock="Right" Source="Images/transparent.png" />
<Button x:Name="btnPrint" DockPanel.Dock="Right" Content="Print" Width="100"/>
<Image DockPanel.Dock="Right" Source="Images/transparent.png" />
</DockPanel>
<StackPanel x:Name="EmailHeaders" Orientation="Horizontal" DockPanel.Dock="Top" Width="Auto" Background="Linen">
<StackPanel Orientation="Vertical">
<TextBlock Text="Subject:" FontSize="16" />
<TextBlock Text="Time Sent:" FontSize="16"/>
<TextBlock Text="Other Recipients: " FontSize="16"/>
</StackPanel>
<StackPanel Orientation="Vertical">
<TextBlock x:Name="labSubject" Text="Subject:" FontSize="16" />
<TextBlock x:Name="labDateTime" Text="Sent:" FontSize="16"/>
<TextBlock x:Name="labSpare" Text="Other Recipients:" FontSize="14"/>
</StackPanel>
</StackPanel>
<DockPanel x:Name="bottomButtonBar" DockPanel.Dock="Bottom" Height="80" >
<Image Width="150" DockPanel.Dock="Left" Source="Images/transparent.png" />
<Button x:Name="btnDelete" DockPanel.Dock="Left" Content="Delete" />
<Image Width="150" Source="Images/transparent.png" />
<Button x:Name="btnSave" Content="Save" />
<Image Width="150" Source="Images/transparent.png" />
<Button x:Name="btnReply" Content="Reply" />
<Image Width="150" DockPanel.Dock="Right" Source="Images/transparent.png" />
</DockPanel>
<StackPanel DockPanel.Dock="Right" Orientation="Vertical" Background="White" Width="150">
<Button x:Name="btnAttachments" Content="Attachment"/>
</StackPanel>
<ScrollViewer x:Name="eTextViewer" VerticalScrollBarVisibility="Auto" HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch">
<TextBox x:Name="eText" Background="White" HorizontalAlignment="Stretch" TextWrapping="Wrap" FontFamily="Verdana" FontSize="18" IsReadOnly="True" />
</ScrollViewer>
<!--Image Width="Auto" Height="Auto" DockPanel.Dock="Bottom" Source="Images/white.png" /-->
<WebBrowser x:Name="eHTML" Height="Auto" DockPanel.Dock="Top" Visibility="Collapsed" />
</DockPanel>
The box is extended only to fill the available height, not the width. The documentation for the DockPanel.LastChildFill Property says,
If you set the LastChildFill property to true, which is the default setting, the
last child element of a DockPanel always fills the remaining space, regardless
of any other dock value that you set on the last child element.
msdn.microsoft.com/en-us/library/system.windows.controls.dockpanel.lastchildfill%28v=vs.110%29.aspx
That does not appear to be the case: in my program it is only filling height, not width. LastFillChild=true is the default, but explicitly setting it to True or False doesn't make a blind bit of difference.
Interestingly, if you set DockPanel.Dock="Top" on the ScrollViewer, it fills the available width but not the height, leaving some of the underlying stuff showing between the text box and the bottom button bar. Again this is contrary to the documentation which says that the dock value set on the last child element is ignored.
Setting HorizontalAlignment="Stretch" to both the ScrollViewer and the TextBox and HorizontalContentAlignment="Stretch" to the ScrollViewer makes not a jot of difference.
So my question is, how can I ensure that the textbox fills the available space in the DockPanel even when the contents of the email are too short?
UPDATE: I have just noticed that if I remove the WebBrowser that is set initially to Visibility="Collapsed", then it works fine. I guess that its presence fools the DockPanel into regarding it as the LastChild even though it is Collapsed.
However, I need to toggle between displaying the email in the web browser and the text box, so removing it isn't an option. Both need to be treated as last child when they are visible. Any ideas?
UPDATE 2: So I wrap the scrollviewer and the web browser in another container, e.g. grid, which is the Last Child. Then I can toggle between the the two but they both fill the space.
Thanks guys. I wouldn't have got there without humiliating myself in public ;)

DockPanel will work, but beware of Collapsed items. Although the documentation says that a collapsed item has no effect on layout, with DockPanel it does if it is the LastChild.
The solution in my case was to add another container as the last child, and place the two items that I wanted to toggle between in that container. Then both will fill the remaining space in the panel.

MvvmCross Popup Window

I would like to have a popup window. Even though I am using MvvmCross, it will strictly run on Android. In Windows Store, you can do the following with xaml:
<Popup VerticalOffset="300" HorizontalOffset="200" x:Name="SigPopup" >
<Border BorderBrush="{StaticResource ApplicationForegroundThemeBrush}"
Background="{StaticResource ApplicationPageBackgroundThemeBrush}"
BorderThickness="1">
<StackPanel>
<StackPanel Orientation="Horizontal" >
<Button x:Name="btnAccept" Content="Accept" Click="btnAccept_Click"/>
<Button x:Name="btnCancel" Grid.Column="1" Content="Cancel" Click="btnCancel_Click"/>
<TextBlock x:Name="txtSigner" Text="Shipper" Style="{StaticResource SubheaderTextBlockStyle}" Margin="25,3,0,0" />
</StackPanel>
<!-- Inking area -->
<Border BorderBrush="{StaticResource ApplicationForegroundThemeBrush}"
Background="{StaticResource ApplicationPageBackgroundThemeBrush}"
BorderThickness="2" Width="750" Height="175">
<Grid x:Name="inkPanel" Margin="5">
<!-- Inking area -->
<Canvas x:Name="InkCanvas" Background="White" Margin="5" />
</Grid>
</Border>
</StackPanel>
</Border>
</Popup>
You can use this to popup a window to collect a Signature. There is an accept and cancel button you can wire up accordingly. Is there any way to do this using MvvmCross? I have watched the ViewModel demo and saw where you could draw rectangles and put data in them and it was bound, but it didn't show how to make them go away once you were done. I had this vision of being able to popup some sort of child ViewModel with a SignatureWidget in it and collect a signature then close the popup. Can this be done using MvvmCross?

there is a Xamarin Component available.
Is this something that fits your need?
http://components.xamarin.com/view/signature-pad
Regards,
Benjamin

How to optimize window layout for full screen view? WPF

I have a WPF window that hosts a simple layout of a home button, top row of buttons and a video feed
but when I maximise the window. the layout is out of sync with the standard view.
I have tried to remedy some of the layout by setting the image element to stretch "fill" but the top row of buttons don't look uniform also the home button relocates to the center of the screen which doesn't look good
My question I how would I adjust the xaml layout properties to support standard and maximised view?
This is the layout for the window:
<Window x:Class="KinectKickboxingBVversion1.TrainingFrm"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="TrainingFrm" Height="377.612" Width="637.313" Loaded="Window_Loaded">
<Grid>
<StackPanel Orientation="Horizontal" >
<Button x:Name="jabBtn" Background="BlueViolet" Content="Jab" Width="100" Height="50" Click="jabBtn_Click" HorizontalAlignment="Center" VerticalAlignment="Top"/>
<Button x:Name="crossBtn" Background="BlueViolet" Content="Cross" Width="100" Height="50" Click="crossBtn_Click" HorizontalAlignment="Center" VerticalAlignment="Top"/>
<Button x:Name="jabCrossHookBtn" Background="BlueViolet" Content="Jab-Cross-Hook" Width="100" Height="50" Click="jabCrossHookBtn_Click" HorizontalAlignment="Center" VerticalAlignment="Top"/>
<Button x:Name="pKickBtn" Content="Push Kick" Background="BlueViolet" Width="100" Height="50" Click="pKickBtn_Click" HorizontalAlignment=" Center" VerticalAlignment="Top"/>
<Button x:Name="blockBtn" Content="Kick Block" Background="BlueViolet" Width="100" Height="50" Click="blockBtn_Click" HorizontalAlignment=" Center" VerticalAlignment="Top"/>
<Label Content="SCORE: " x:Name="lblScore" Visibility="Collapsed"/>
<TextBlock x:Name="tblkScore" />
</StackPanel>
<Viewbox Grid.Row="1" Stretch="Uniform" HorizontalAlignment="Center">
<Image x:Name="KinectVideo" Width="640" Height="250" Visibility="Visible" Stretch="Fill" />
</Viewbox>
<Button x:Name="homeBtn" Content="" Width="50" Click="homeBtn_Click" Height="35" Margin="272,294,277,10" >
<Button.Background>
<ImageBrush ImageSource="Images/ContentIcon.png" />
</Button.Background>
</Button>
</Grid>
</Window>

Your buttons are all a fixed size. StackPanel just plonks them next to each other, so when your screen size is bigger, you end up with space left over on the right.
Same with your home button. It's being positioned via the absolute margins.
You could make your layout fluid by using 6 grid columns for the top buttons, and removing the margins on the home button and just setting it to HorizontalAlignment="Center" VerticalAlignment="Bottom".
However, this will still result in effectively smaller text on the buttons. If you want the display to always have the same proportions it may be easier for you to simply plonk the whole thing in a ViewBox.

use grid instead of stackpanel and set the column width to "*" and put your buttons in that grid

WPF Button with multiple text elements for 10 foot gui

I am trying to create buttons for a 10-foot GUI using WPF. Each button requires a little more data than just a single text string and an image, maybe 2-3 strings located in different positions and some imagery.
I have tried
<Button Height="52" HorizontalAlignment="Stretch" Name="button1" Width="407">
<Button.Content>
<DockPanel LastChildFill="True" HorizontalAlignment="Stretch">
<TextBlock Name="textBloczk2" Text="ABC" TextAlignment="Left" DockPanel.Dock="Left"/>
<TextBlock Name="textBlxock1" Text="CDE" TextAlignment="Right" DockPanel.Dock="Right"/>
</DockPanel>
</Button.Content>
</Button>
But no matter which inner container I use, the button seems to disregard the layout from the DockPanel and the combined text ends up in the middle of the button. Am I doing something wrong or should I be using a different outer container ?

The problem seems to be that the DockPanel's width is so small that the Right and Left panels are the same width as your TextBlocks.
This seems to work as expected (setting the width of the DockPanel):
<Button Height="52" HorizontalAlignment="Stretch" Name="button1" Width="407">
<Button.Content>
<DockPanel LastChildFill="True" Width="300">
<TextBlock Name="textBloczk1" Text="Left" DockPanel.Dock="Left" />
<TextBlock Name="textBlxock2" Text="Right" DockPanel.Dock="Right" />
<TextBlock Name="textBlxock3" Text="Top" DockPanel.Dock="Top" />
<TextBlock Name="textBlxock4" Text="Bottom" DockPanel.Dock="Bottom" />
</DockPanel>
</Button.Content>
</Button>

Try to add "HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" to your button. This way dockpanel will occupy all space inside the button.