Is it possible to set the position alignment for a GroupBox Header in WPF? The default is to place in the top left corner of the GroupBox outline but I would like it to be centered at the top. I know that you can set the properties of the text using:
<GroupBox Grid.Row="1" HorizontalAlignment="Center">
<GroupBox.Header>
<TextBlock Text="Cash Match" Foreground="Black" FontWeight="Bold"/>
</GroupBox.Header>
</GroupBox>
But I'm looking to set the position of it with respect to the GroupBox outline.
It's simple! Just edit Template of GroupBox:
In Blend, do the following :
Right click GroupBox > Edit Template > Edit a Copy > OK
Search for following section:
<Border x:Name="Header" Padding="3,1,3,0"
Grid.Column="1" Grid.Row="0" Grid.RowSpan="2">
...
</Border>
Change Grid.Column to 2
Also set HorizontalAlignment="Right"
You have just aligned the header to right!!! But bot the white gap behind it. For that,
Now search for following section :
<Border BorderBrush="White" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="4" Grid.ColumnSpan="4" Grid.Row="1" Grid.RowSpan="3">
<Border.OpacityMask>
...
</Border.OpacityMask>
...
</Border>
Add RenderTransformOrigin="0.5,0.5" to the border
Just above , add following code (this will shift the "white gap" behind header to right:
<Border.RenderTransform>
<ScaleTransform ScaleX="-1"/>
</Border.RenderTransform>
You are done! You just got a GroupBox with right aligned header!!!
Please tell me if this is what you required.
Changing the group-box-header alinment will result in non-OS-conform controls.
Therefore, I think you won't be able to change this using the default styles. A custom template will solve your problem.
Related
I've got the following control template which I use as a Validation.ErrorTemplate for TextBoxes:-
<ControlTemplate x:Key="ControlValidationErrorTemplate">
<DockPanel LastChildFill="True">
<Border Background="Red"
DockPanel.Dock="right"
Padding="2,0,2,0"
ToolTip="{Binding ElementName=valAdorner, Path=AdornedElement.(Validation.Errors), Converter={x:Static val:ValidationErrorsConverter.Instance}}">
<TextBlock Text="!"
VerticalAlignment="center"
HorizontalAlignment="center"
FontWeight="Bold"
Foreground="white" />
</Border>
<AdornedElementPlaceholder x:Name="valAdorner"
VerticalAlignment="Center">
<Border BorderBrush="red"
BorderThickness="1" />
</AdornedElementPlaceholder>
</DockPanel>
</ControlTemplate>
When a TextBox contains invalid content, the above template applies a red border and adds a red box containing an exclamation mark immediately to the right of the TB.
The problem is, the exclamation mark overlaps anything immediately to the right of the TB, rather than the layout changing to accomomodate the exclamation mark. I have a similar problem in DataGrids - the exclamation mark overlaps the right-hand edge of the containing cell, rather than the column width increasing to accommodate it.
Using Snoop, it appears that the template is being displayed in an "adorner layer" which I assume is a separate visual tree? This would explain why the window's layout isn't recalculated to take into account the exclamation mark. Can anyone suggest a way to achieve what I want?
As I suspected, it's due to the error template being rendered on the adorner layer, so it doesn't affect the layout of the window. See: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/9de3c9e5-5759-4f88-9184-175d3eaabdad/
I'm now using this control template instead:-
<ControlTemplate x:Key="ControlValidationErrorTemplate">
<Grid>
<Polygon Points="9,9 9,0 0,0"
Stroke="Red"
StrokeThickness="1"
Fill="Red"
HorizontalAlignment="Right"
VerticalAlignment="Top"
ToolTip="{Binding ElementName=valAdorner, Path=AdornedElement.(Validation.Errors), Converter={x:Static val:ValidationErrorsConverter.Instance}}" />
<AdornedElementPlaceholder x:Name="valAdorner"
VerticalAlignment="Center">
<Border BorderBrush="red"
BorderThickness="1" />
</AdornedElementPlaceholder>
</Grid>
</ControlTemplate>
This draws a red border around the control, with a small red triangle overlapping the top-right corner of the control - hovering over this displays a tooltip containing the error message.
I want my to have a sunken border like a textbox. How to do this? Is there a way to get the controltemplate to mimc the parent border?
There is no theme for you to use, but you can work around like this:
Using this MSDN model (http://i.msdn.microsoft.com/dynimg/IC84967.gif):
Here's my recommendation: (sunken inner)
Just change the height/width of the outside border and you use this block of XAML like a TextBox. Reverse the two border tags if you want an outder border instead. Should be easy for you.
<Border Width="100" Height="200"
BorderBrush="Gainsboro" BorderThickness="0,0,5,5">
<Border BorderBrush="Gray" BorderThickness="5,5,0,0">
<TextBox Text="Hello World"
BorderThickness="0"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" />
</Border>
</Border>
Special thanks to: Style a border with a different brush color for each corner
Should look like this:
You can try something like this
<Border Margin="20" BorderThickness="0.5" BorderBrush="Gray">
<Border BorderThickness="1,1,0,0" BorderBrush="DarkGray">
<ContentPresenter />
</Border>
</Border>
You might need to play with the colours though.
I've created a highlighting mechanism for a RichTextBox in Silverlight 4. It'll get character positions and draw rectangle(s) over the text.
The trouble I have now is with scrolling on the RichTextBox. As I scroll all of my precious highlighting gets left behind. Is there any way I can add an event handler to a scroll event and/or a scrolling position of the RichTextBox? Or is there some better way in which I can link the position of the highlighting rectangles to the RichTextBox?
The trick would be to get what ever panel (I guess its a Canvas?) that you are overlaying the RichTextBox with to actually exist within the same ScrollViewer that rich text exists in.
The following is very rough idea but should get you on the path to reasonable solution.
You can do this using a custom style for the RichTextBox. The default style for this control can be found here.
Copy this style into a resource in your containing UserControl and point your RichTextBox Style property at it. So far nothing is different but now you can play about with the template. The relevant portion currently looks like this:-
<Border x:Name="MouseOverBorder" BorderThickness="1" BorderBrush="Transparent">
<ScrollViewer x:Name="ContentElement" Padding="{TemplateBinding Padding}" BorderThickness="0" IsTabStop="False" />
</Border>
Now we can tweak it like this:-
<Border x:Name="MouseOverBorder" BorderThickness="1" BorderBrush="Transparent">
<ScrollViewer Padding="{TemplateBinding Padding}" BorderThickness="0" IsTabStop="False">
<Grid>
<ContentControl x:Name="ContentElement" />
<Canvas x:Name="HighlightOverlay" />
</Grid>
</ScrollViewer>
</Border>
You'll note that we've moved the name "ContentElement" from the ScrollViewer to the new ContentControl. Having a FrameworkElement called "ContentElement" is the only feature that the RichTextBox stipulates about its template.
Now overlaying this ContentControl we can place a Canvas where you can place your highlighting rectangles. If the user scrolls this RichTextBox the whole Grid containing both the Content and the Highlights will scroll together.
The only remaining trick is acquiring the "HighlightOverlay" so that you can add your rectangle to it. Here is some code that will grab it:-
private Canvas HightlightOverlay;
public MyUserControl()
{
InitializeComponent();
MyRichText.LayoutUpdated += MyRichText_LayoutUpdated;
}
void MyRichText_LayoutUpdated(object sender, EventArgs e)
{
HightlightOverlay = MyRichText.Descendents()
.OfType<Canvas>()
.FirstOrDefault(elem => elem.Name == "HighlightOverlay");
}
You will be wondering where the Descendents method is coming from, it is here.
Anthony W Jones came up with a brilliant solution. There were just a couple tweaks to the XAML I had to make.
As suggested I started with this inside the template:
<Border x:Name="MouseOverBorder" BorderThickness="1" BorderBrush="Transparent">
<ScrollViewer Padding="{TemplateBinding Padding}" BorderThickness="0" IsTabStop="False">
<Grid>
<ContentControl x:Name="ContentElement" />
<Canvas x:Name="HighlightOverlay" />
</Grid>
</ScrollViewer>
</Border>
But the ContentControl messed things up somehow and you can't actually type into the RichTextBox anymore. Also, the scroll bars weren't showing up.
But I found the two changes necessary to make this work:
<Border x:Name="MouseOverBorder" BorderBrush="Transparent" BorderThickness="1">
<ScrollViewer BorderThickness="0" IsTabStop="False" Padding="{TemplateBinding Padding}" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<Grid>
<Grid x:Name="ContentElement" />
<Canvas x:Name="HighlightOverlay" />
</Grid>
</ScrollViewer>
</Border>
Adding HorizontalScrollBarVisibility="Auto" and VerticalScrollBarVisibility="Auto" brought the scroll bars back, and simply using Grid instead of the ContentControl made the RichTextBox editable again.
I have a StackPanel containing five images and I want to put a black border around each image.
The XAML I have at the moment is:
<Image Name="imgPic1"
Width="100"
Height="75"
Stretch="Fill"
VerticalAlignment="Top" />
I thought I would be just able to put a one-unit margin or padding on the image and set a background color to 000000 but Padding and Background are both invalid for images.
What is an easy way to do this in XAML? Do I really have to put each image inside another control to get a border around it or is there some other trickery I can use?
Simply wrap the Image in a Border control
<Border BorderThickness="1">
<Image Name="imgPic1"
Width="100"
Height="75"
Stretch="Fill"
VerticalAlignment="Top" />
</Border>
You could also provide a style you apply to images that does this if you don't want to do it around every image
Final solution from answer and comments added by Pax:
<Border BorderThickness="1"
BorderBrush="#FF000000"
VerticalAlignment="Top">
<Image Name="imgPic1"
Width="100"
Height="75"
Stretch="Fill"
VerticalAlignment="Top"/>
</Border>
The accepted answer will not work because of the problem described here
https://wpf.2000things.com/2011/04/17/279-adding-a-border-around-an-image-control/
I solved it this way.
<Viewbox>
<Border BorderThickness="3" BorderBrush="Red">
<Image Stretch="None" ></Image>
</Border>
</Viewbox>
I just stumbled upon this post and the other answer did not work right. Maybe because I now use framework 4 and this post is old?
In any case - if someone will see this by chance in the future - here is my answer:
<Border Name="brdSiteLogo"
BorderThickness="2"
BorderBrush="#FF000000"
VerticalAlignment="Top"
HorizontalAlignment="Left"
Margin="12,112,0,0"
Height="128"
Width="128">
<Image Name="imgSiteLogo"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Stretch="Fill"/>
</Border>
The border thickness and brush are important (if you wont choose a color - you will not see the border!!!)
Also, the border should be aligned on your window. The image is "inside" the border, so you can use margins or just stretch it like I did.
Please pardon my ignorance- I'm very new to WPF.
I am looking to implement a minor, visual effect in my application that gives the look of "inner" rounded corners. The window in question has a dark border that encapsulates several UIElements, one of which is a StatusBar, located at the bottom of the window. This StatusBar has a dark background that matches the window's border. Above the StatusBar is a content view, which is currently a Grid- its background is semi-transparent (I think that this is something of a constraint- you can see through the content view to the desktop below). I would like for the content view (represented by the transparent, inner area in the figure below) to have the look of rounded corners, though I expect to have to sort of create the illusion myself.
(Can't post the image because I'm a lurker and not a poster- please find the drawing here)
My first approach was to add a Rectangle (filled with the same, dark color as the border) immediately above the StatusBar and to assign a Border with rounded corners to its OpacityMask (similar to the solution proposed by Chris Cavanagh**). Sadly, the effect that is produced is the exact opposite of that which I am trying to achieve.
I understand that the Clip property can be of use in this sort of situation, but it seems to me that using any sort of Geometry will prove to be inadequate as it won't be dynamically sized to the region in which it resides.
EDIT: Including my XAML:
<Grid Background="{StaticResource ClientBg}" Tag="{Binding OverlayVisible}" Style="{StaticResource mainGridStyle}">
<DockPanel LastChildFill="True">
<!-- Translates to a StackPanel with a Menu and a Button -->
<local:FileMenuView DockPanel.Dock="Top" />
<!-- Translates to a StatusBar -->
<local:StatusView DockPanel.Dock="Bottom" />
<!-- Translates to a Grid -->
<local:ContentView />
</DockPanel>
</Grid>
Any pointers are more than welcome- I'm ready to provide more indepth detail if necessary.
** http://www.dotnetkicks.com/wpf/WPF_easy_rounded_corners_for_anything
EDIT: Now I got what you mean. In fact you can use Path + OpacityMask approach. You have to draw "inverted" path, to use it as opacity mask. But I have simpler and faster solution for you :). Use Border + CornerRadius, and fill the gaps with solid paths. Just try the following code in Kaxaml and let me know if this is what you were looking for:
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="240"
Height="320"
AllowsTransparency="True"
Background="Transparent"
WindowStyle="None">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="24"/>
<RowDefinition Height="*"/>
<RowDefinition Height="24"/>
</Grid.RowDefinitions>
<Border Background="Black"/>
<Border Grid.Row="1" BorderBrush="Black" BorderThickness="5">
<Grid>
<Border Background="White" CornerRadius="0, 0, 5, 5" Opacity="0.7"/>
<Path
Width="15"
Height="15"
HorizontalAlignment="Left"
VerticalAlignment="Bottom"
Data="M10,10 L5,10 L5,5 C4.999,8.343 6.656,10 10,10 z"
Fill="Black"
Stretch="Fill"/>
<Path
Width="15"
Height="15"
HorizontalAlignment="Right"
VerticalAlignment="Bottom"
Data="M10,10 L5,10 L5,5 C4.999,8.343 6.656,10 10,10 z"
Fill="Black"
Stretch="Fill">
<Path.RenderTransform>
<TransformGroup>
<ScaleTransform ScaleX="-1"/>
<TranslateTransform X="15"/>
</TransformGroup>
</Path.RenderTransform>
</Path>
</Grid>
</Border>
<Border Grid.Row="2" Background="Black"/>
</Grid>
</Window>
PS: You can simplify this solution by avoiding render transforms, but you got the idea.