Develop Reference

Centering ListBoxItem content horizontally and vertically in WPF

I'm trying to center the content of my ListBoxItem vertically and horizontally but I can't get it to work.
My style template :
<Style x:Key="myListBoxItem" TargetType="ListBoxItem">
<Style.Resources>
<Style TargetType="Border">
<Setter Property="Effect">
<Setter.Value>
<DropShadowEffect ShadowDepth="2" Direction="90" BlurRadius="4" Color="Black" Opacity="0.25"/>
</Setter.Value>
</Setter>
</Style>
</Style.Resources>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<Border Background="{TemplateBinding Background}">
<ContentPresenter/>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="#fe3f3f"/>
<Setter Property="Foreground" Value="White"/>
<Setter Property="FontWeight" Value="DemiBold"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="True"/>
<Condition Property="IsSelected" Value="False"/>
</MultiTrigger.Conditions>
<MultiTrigger.Setters>
<Setter Property="Background" Value="#e9e9e9"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="Cursor" Value="Hand"/>
</MultiTrigger.Setters>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="Width" Value="160"/>
<Setter Property="Height" Value="75"/>
<Setter Property="Background" Value="White"/>
<Setter Property="FontSize" Value="19"/>
</Style>
Here is how I apply this style : I have a simple ListBox in my XAML, and I append ListBoxItems to it in code-behind. I set the ResourceReference of each ListBoxItem to my style this way :
foreach (var equipment in listEquipments)
{
var lbi = new ListBoxItem();
lbi.Content = equipment.Name;
lbi.SetResourceReference(StyleProperty, "myListBoxItem");
ListBox_Equipments.Items.Add(lbi);
}
I've tried to set the HorizontalContentAlignment and HorizontalContentAlignment of the ListBoxItem (through the style template) to Center, as well as the HorizontalAlignment and VerticalAlignment, but nothing succeeded. I thought it might have to do with my style template.
I also tried some ItemTemplates such as :
<ListBox HorizontalContentAlignment="Center">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Text}" FontSize="72"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
No luck so far.

An ItemTemplate is not applied to a ListBoxItem.
Set or bind the ItemsSource of the ListBox to your listEquipments:
ListBox_Equipments.ItemsSource = listEquipments;
...and set the ItemContainerStyle of the ListBox to your custom Style:
<ListBox x:Name="ListBox_Equipments"
ItemContainerStyle="{StaticResource myListBoxItem}">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" HorizontalAlignment="Center" VerticalAlignment="Center" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>

How do you put vertical lines in between DataGrid Headers in C# WPF

I have a DataGrid, I'm trying to just put vertical lines in the Headers - just like the datagrid has the feature to put vertical and horizontal gridlines in.. But how in the world can I put GridLines to separate the Headers? Right now I have
<DataGrid.Resources>
<Style TargetType="{x:Type DataGridColumnHeader}">
<Setter Property="Background" Value="LightBlue" />
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="FontSize" Value="18" />
<Setter Property="FontFamily" Value="Calibri" />
</Style>
</DataGrid.Resources>

DataGridColumnHeader is a ButtonBase, you can style its BorderThickness and BorderBrush to achieve what you want, also you may want the header to be center, so we also need to set HorizontalContentAlignment:
<DataGrid.Resources>
<Style TargetType="{x:Type DataGridColumnHeader}">
<Setter Property="Background" Value="LightBlue" />
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="FontSize" Value="18" />
<Setter Property="FontFamily" Value="Calibri" />
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="BorderThickness" Value="0,0,1,0"></Setter>
<Setter Property="BorderBrush" Value="Black"/>
</Style>
</DataGrid.Resources>

Use the HeaderTemplate. A quick way to do this:
<DataGrid>
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Name}"
Header="{Binding HeaderName}">
<DataGridTextColumn.HeaderTemplate>
<DataTemplate>
<Border BorderThickness="0,0,1,0"
BorderBrush="Black">
<TextBlock Text="{Binding Content, RelativeSource={RelativeSource Mode=TemplatedParent}}"
Margin="5"/>
</Border>
</DataTemplate>
</DataGridTextColumn.HeaderTemplate>
</DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>

Binding Failure on ToolBar Dragging

I have have a ToolBar which I am styling using the code shown below. I have come across three problems with the my ToolBar styling:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="http://www.caliburnproject.org">
<Style x:Key="ToolBarToggleButton" TargetType="{x:Type ToggleButton}"
BasedOn="{StaticResource {x:Static ToolBar.ToggleButtonStyleKey}}">
<Setter Property="Icon" Value="{Binding Icon}"/>
<Setter Property="ToolTip" Value="{Binding FullToolTip}" />
<Setter Property="ToolTipService.IsEnabled" Value="{Binding HasToolTip}" />
<Setter Property="IsChecked" Value="{Binding IsChecked}" />
<Setter Property="cal:Action.Target" Value="{Binding}" />
<Setter Property="cal:Message.Attach" Value="{Binding ActionText}" />
</Style>
...
First:
The tool bar images are currently getting used as a single static instance. Even with the property x:Shared="False" moving the ToolBar one over another will cause a rendering failure.
Solution:
In the ToolTip Styles.xaml, include the image source as a ContentTemplate
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="http://www.caliburnproject.org">
<Style x:Key="ToolBarToggleButton" TargetType="{x:Type ToggleButton}"
BasedOn="{StaticResource {x:Static ToolBar.ToggleButtonStyleKey}}">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Image x:Shared="false" Source="{Binding Icon}">
<Image.Style>
<Style TargetType="Image">
<Setter Property="Width" Value="16" />
<Setter Property="Height" Value="16" />
<Setter Property="Stretch" Value="Fill" />
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
</Trigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</DataTemplate>
</Setter.Value>
</Setter>
<Setter Property="ToolTip" Value="{Binding FullToolTip}" />
<Setter Property="ToolTipService.IsEnabled" Value="{Binding HasToolTip}" />
<Setter Property="IsChecked" Value="{Binding IsChecked}" />
<Setter Property="cal:Action.Target" Value="{Binding}" />
<Setter Property="cal:Message.Attach" Value="{Binding ActionText}" />
</Style>
<Style x:Key="ToolBarButton" TargetType="{x:Type Button}"
BasedOn="{StaticResource {x:Static ToolBar.ButtonStyleKey}}">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Image x:Shared="false" Source="{Binding Icon}">
<Image.Style>
<Style TargetType="Image">
<Setter Property="Width" Value="16" />
<Setter Property="Height" Value="16" />
<Setter Property="Stretch" Value="Fill" />
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.5" />
</Trigger>
</Style.Triggers>
</Style>
</Image.Style>
</Image>
</DataTemplate>
</Setter.Value>
</Setter>
<Setter Property="ToolTip" Value="{Binding FullToolTip}" />
<Setter Property="ToolTipService.IsEnabled" Value="{Binding HasToolTip}" />
<Setter Property="cal:Action.Target" Value="{Binding}" />
<Setter Property="cal:Message.Attach" Value="{Binding ActionText}" />
</Style>
</ResourceDictionary>
Now we have:
No other changes required.
Second:
The same dragging procedure the ToolTip and ToolTipService bindings also get corrupted - at this stage I am not sure of the underlying reason. The quick solution is to do what I have done with the image above and add the ToolTip to the Image. However, this causes the ToolTip only to show when over the Image and not when hovering over the very edge of the button.
Partial Solution:
Add the ToolTip to the Image. However, this is not ideal as then the tool tips do not show when on the very edge of the button.
Third:
When the drag operation shown above occurs, this also breaks the Caliburn property bindings
<Setter Property="cal:Action.Target" Value="{Binding}" />
<Setter Property="cal:Message.Attach" Value="{Binding ActionText}" />
Questions: (Second and Third Problem)
How to fix the problem with the ToolTip rendering?
How to fix the problem with the Caliburn property binding?
Thanks for your time.
Solution:
"I've finally fixed this. As near as I can tell, when you initiate a drag on a toolbar, any toolbar items on other toolbars which are covered by the toolbar you're dragging get removed from their current position in the visual tree, and then (presumably) added back when they're made visible again.
When they're removed from the visual tree (again, that's what I think is happening), they also lose access to the ToolBarToggleButton and ToolBarButton styles, because those are defined in the Styles.xaml resource dictionary which is added in ToolBarsView.xaml.
However, if you define those same styles globally, then it works - presumably, even though they're no longer children of ToolBarsView, they still have access to the global resources.
So... I've added a new property, IModule.GlobalResourceDictionaries, which allows each module to declare any resource dictionaries that should be added at the global scope. The ToolBars module makes use of this."
https://github.com/tgjones/gemini/issues/67#issuecomment-60040008

Try to re-assign the tooltips as a style trigger for the mouse over event such as:
<Button.Style>
<Style TargetType="Button">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="ToolTip" Value="{Binding FullToolTip}" />
<Setter Property="ToolTipService.IsEnabled" Value="{Binding HasToolTip}" />
</Trigger>
<Trigger Property="IsMouseOver" Value="False">
<Setter Property="ToolTip" Value="{Binding FullToolTip}" />
<Setter Property="ToolTipService.IsEnabled" Value="{Binding HasToolTip}" />
</Trigger>
</Style.Triggers>
</Style>
</Button.Style>

Text Trimming on DataGrid Template Column

I have the following Column in my datagrid :
<DataGridTemplateColumn CanUserReorder="False" CanUserResize="True" Header="">
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate />
</DataGridTemplateColumn.CellEditingTemplate>
<DataGridTemplateColumn.CellStyle>
<Style TargetType="DataGridCell" BasedOn="{StaticResource DatagridCellHyperlinkStyle}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Border Padding="{TemplateBinding Padding}" VerticalAlignment="Center">
<TextBlock Width="Auto" Height="Auto" TextTrimming="CharacterEllipsis">
<Hyperlink>
<InlineUIContainer TextDecorations="{Binding Path=TextDecorations, RelativeSource={RelativeSource AncestorType=TextBlock}}" Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType=TextBlock}}">
<ContentPresenter Width="Auto" Height="Auto" Content="{Binding DataContext.Value, RelativeSource={RelativeSource AncestorType=DataGridRow}}"/>
</InlineUIContainer>
<Hyperlink.Style>
<Style TargetType="Hyperlink" BasedOn="{StaticResource HyperlinkStyle}">
<EventSetter Event="Hyperlink.Click" Handler="Click" />
</Style>
</Hyperlink.Style>
</Hyperlink>
</TextBlock>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DataGridTemplateColumn.CellStyle>
</DataGridTemplateColumn>
The hyperlink works perfectly (with my style also) but the text trimming doesn't work. How can I change my code to make it work ?
The 2 styles attached :
<Style x:Key="DatagridCellHyperlinkStyle" TargetType="{x:Type DataGridCell}">
<Setter Property="Padding" Value="5" />
<Setter Property="BorderBrush" Value="Transparent" />
<Setter Property="FontSize" Value="14" />
<Setter Property="FontFamily" Value="Helvetica" />
<Setter Property="FocusVisualStyle" Value="{x:Null}" />
<Setter Property="Foreground" Value="{StaticResource CouleurBouton}"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="{StaticResource ResourceKey=CouleurBouton}"/>
<Setter Property="Foreground" Value="{StaticResource ResourceKey=CouleurFond}" />
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{StaticResource ResourceKey=CouleurBouton}"/>
<Setter Property="Foreground" Value="{StaticResource ResourceKey=CouleurFond}" />
</Trigger>
<DataTrigger Binding="{Binding Path=IsMouseOver, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True">
<Setter Property="Background" Value="{StaticResource ResourceKey=CouleurBoutonHover}"/>
<Setter Property="Foreground" Value="{StaticResource ResourceKey=CouleurTexteBoutonHover}" />
</DataTrigger>
</Style.Triggers>
</Style>
<Style x:Key="HyperlinkStyle" TargetType="{x:Type Hyperlink}">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Foreground" Value="{DynamicResource CouleurBoutonPressed}" />
</Trigger>
</Style.Triggers>
<Setter Property="Foreground" Value="{DynamicResource CouleurBouton}" />
<Setter Property="TextBlock.TextDecorations" Value="{x:Null}" />
</Style>
Thank you !

You have nothing that will restrict the TextBlock.Width, so the text in it will never wrap, or be trimmed. To fix this problem, you just need to set some kind of Width restriction on it... you could try something like this:
<ControlTemplate>
<Border Padding="{TemplateBinding Padding}" VerticalAlignment="Center">
<TextBlock MaxWidth="250" TextTrimming="CharacterEllipsis">
...

Well, for WPF engine to understand that the trimming is needed it should see that the control cannot be put into the space available. If the control can be resized(AutoSize) it will just increase its dimensions without any trimming.
From MSDN:
Gets or sets the text trimming behavior to employ when content
overflows the content area.
And I can't see anything in your template that suggests that the space limit will be encountered.
So try to set width limit, either on Column, or on the TextBlock. Or restrict the resize in some other way.
<TextBlock Width="Auto" Height="Auto"
MaxWidth="100"
MinWidth="30"
TextTrimming="CharacterEllipsis">

ItemContainerStyle for RibbonGroup

I'm trying to bind a RibbonGroup and a couple of RibbonButtons to my viewmodel with the following xaml:
<Style TargetType="{x:Type ribbon:RibbonGroup}" x:Key="RibbonGroupStyle">
<Setter Property="Header" Value="{Binding Header}" />
<Setter Property="ItemContainerStyle" Value="{DynamicResource RibbonButtonStyle}" />
<Setter Property="ItemsSource" Value="{Binding Buttons}" />
</Style>
<Style TargetType="{x:Type ribbon:RibbonButton}" x:Key="RibbonButtonStyle">
<Setter Property="Label" Value="{Binding Header}" />
</Style>
This gives me the following error, which I can understand, but how do I properly bind the Label of the RibbonButton to my viewmodel?
A style intended for type 'RibbonButton' cannot be applied to type 'RibbonControl'.

You can place one style inside the other and apply it to every button:
<Style TargetType="{x:Type ribbon:RibbonGroup}" x:Key="RibbonGroupStyle">
<Style.Resources>
<Style TargetType="{x:Type ribbon:RibbonButton}" BasedOn="{StaticResource {x:Type ribbon:RibbonButton}">
<Setter Property="Label" Value="{Binding Header}" />
</Style>
</Style.Resources>
<Setter Property="Header" Value="{Binding Header}" />
<Setter Property="ItemsSource" Value="{Binding Buttons}" />
</Style>