Listiview Item not highlighting when hovering over - UWP (Windows 10) - xaml

I have a UserControl used as an item template in a ListView and when I hover a specific item it doesn't highlight it yet I have other ListViews in my project where the specific item is highlighted over.
I've removed the code from my UserControl and copy/pasted it directly in my DataTemplate to check if it was related to the fact that I was using a UserControl but no difference.
This ListView is contained in a SemanticZoom, so again I removed the SemanticZoom to check if the behaviour would change, but to no avail! Still doesn't get highlighted.
All my ListViews have their SelectionMode set to Single and I've got a style defined at the app level which is applied to all my ListViews
This is the code in my UserControl:
<UserControl
x:Class="MyApp.UserControls.ZoomedIn"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:MyApp.UserControls"
xmlns:converters="using:MyApp.Converters"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="470">
<UserControl.Resources>
<converters:WrapOnConverter x:Key="WrapOnConverter"/>
</UserControl.Resources>
<Grid x:Name="Details"
Background="White"
Grid.Column="0"
Grid.Row="0"
Margin="12,5,12,5">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Image x:Name="Image"
Source="{Binding Image}"
Width="100"
Height="100"
Stretch="UniformToFill"
Grid.Row="0"
Grid.Column="0"
Grid.RowSpan="2"
HorizontalAlignment="Left"
VerticalAlignment="Top" />
<Image x:Name="Image2"
Source="{Binding Image2}"
Width="30"
Height="30"
Margin="67,67,0,0"
Stretch="UniformToFill"
Grid.Row="0"
Grid.Column="0"
Grid.RowSpan="2"
HorizontalAlignment="Left"
VerticalAlignment="Top" />
<Image x:Name="Image3"
Source="{Binding Image3}"
Width="30"
Height="30"
Margin="32,67,0,0"
Stretch="UniformToFill"
Grid.Row="0"
Grid.Column="0"
Grid.RowSpan="2"
HorizontalAlignment="Left"
VerticalAlignment="Top" />
<StackPanel Margin="5,0,5,0"
Grid.Row="0"
Grid.Column="1"
VerticalAlignment="Top">
<TextBlock x:Name="Title"
Text="{Binding Title}"
Foreground="{ThemeResource
SystemControlForegroundAccentBrush}"
FontWeight="SemiBold"
VerticalAlignment="Top"
TextWrapping="{Binding
Converter={StaticResource WrapOnConverter}}" />
<TextBlock x:Name="Time"
Text="{Binding Time}"
Foreground="DarkCyan"
VerticalAlignment="Top"
HorizontalAlignment="Left"
Margin="0,5,0,5" />
<TextBlock x:Name="Description"
Text="{Binding Description}"
Foreground="Black"
TextWrapping="Wrap"
VerticalAlignment="Top"
HorizontalAlignment="Left"
MaxLines="2"/>
</StackPanel>
</Grid>
</UserControl>
And my ListView is defined as follows:
<ListView ItemsSource="{Binding Source={StaticResource cvsDetails}}"
SelectionMode="Single"
SelectedIndex="{Binding SelectedDetailIndex}"
SelectedItem="{Binding SelectedDetail, Mode=TwoWay}"
ItemContainerStyle="{StaticResource ListViewItemStyle}">
<ListView.ItemTemplate>
<DataTemplate>
<usercontrols:ZoomedIn DataContext="{Binding}" />
</DataTemplate>
</ListView.ItemTemplate>
<ListView.GroupStyle>
<GroupStyle>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<TextBlock FontSize="20"
Text="{Binding CategoryName}"
Foreground="{ThemeResource
SystemControlForegroundAccentBrush}"
FontWeight="SemiBold" />
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
</ListView.GroupStyle>
<Interactivity:Interaction.Behaviors>
<Core:EventTriggerBehavior EventName="Tapped">
<Core:InvokeCommandAction
Command="{Binding ItemClickCommand}"
CommandParameter="{Binding SelectedDetail}" />
</Core:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</ListView>
Does anyone have any ideas why one ListView would be behaving differently to the others?
Thanks.

The item is not highlighted because you have the Background="White" set, and this color will always be above the highlight color. The UserControl background needs to be set to Transparent.
To make it work the way you want, you need to change the ItemContainerStyle of your ListView. If you have different elements in your ListView you can use ItemContainerStyleSelector.
You can read more about ListViewItem here.
You need the change the Background property of list view items, for example:
<ListView>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="Background" Value="White"/>
</Style>
</ListView.ItemContainerStyle>
</ListView>

Related

UWP ListView with no scrolling

For some reason, scrolling simply doesn't work on this ListView, and I really don't know why. The items display properly, just the list isn't scrollable. Using grids isn't viable (from what I know, anyway) since the items that are set to appear are pulled from a web source (don't know how many there will be, nor am I very willing to use hacky methods to get a scrollable list).
<Page
x:Class="Hello_World.News_Feed"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Hello_World"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:muxc="using:Microsoft.UI.Xaml.Controls"
mc:Ignorable="d">
<ListView x:Name="NewsFeedList" x:FieldModifier="public"
Padding="15,15,15,15"
FontFamily="Segoe UI Variable Display"
SelectionMode="None"
VerticalAlignment="Top"
Margin="10,0,0,0">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="Margin" Value="0, 10, 0, 10"/>
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<Frame
BorderThickness="1"
Padding="10,10,10,10"
CornerRadius="5"
Height="Auto">
<Frame.BorderBrush>
<SolidColorBrush Color="Gray" Opacity="0.2" />
</Frame.BorderBrush>
<Frame.Background>
<SolidColorBrush Color="Gray" Opacity="0.05" />
</Frame.Background>
<Grid>
<Grid Padding="0,5,0,0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="60"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Border Grid.Column="0" Margin="3,3,0,0" CornerRadius="100" Height="50" Width="50" VerticalAlignment="Top">
<Border.Background>
<ImageBrush Stretch="Fill" ImageSource="{Binding AuthorPicture}"/>
</Border.Background>
</Border>
<TextBlock x:Name="Author" Margin="15,5,0,0" Height="Auto" Grid.Column="1" FontSize="17" FontFamily="Segoe UI Variable Text" FontWeight="Semibold" Text="{Binding Author}" TextWrapping="WrapWholeWords">
<TextBlock.Foreground>
<SolidColorBrush>#353535</SolidColorBrush>
</TextBlock.Foreground>
</TextBlock>
<TextBlock x:Name="Time" Margin="15,28,0,0" Height="Auto" Grid.Column="1" FontSize="15" FontFamily="Segoe UI Variable Text" FontWeight="Normal" Text="{Binding Time}" TextWrapping="WrapWholeWords">
<TextBlock.Foreground>
<SolidColorBrush>#656565</SolidColorBrush>
</TextBlock.Foreground>
</TextBlock>
</Grid>
<Grid Padding="10,5,10,10">
<TextBlock x:Name="Heading" Margin="0,70,0,0" Height="Auto" Grid.Column="1" FontSize="18" FontFamily="Segoe UI Variable Text" FontWeight="Semibold" Text="{Binding Title}" TextWrapping="WrapWholeWords"/>
<TextBlock x:Name="Body" Margin="0,100,0,0" Height="Auto" Grid.Column="1" FontFamily="Segoe UI Variable Text" FontWeight="Normal" Text="{Binding Body}" TextWrapping="WrapWholeWords"/>
</Grid>
</Grid>
</Frame>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Page>
Even after conducting some research online, I couldn't find a solution to this annoying issue. Any ideas?
After conducting more tests, I finally found that it was the automatic height of the frame which I call NavigateTo on which causes this issue. Manually setting the height fixes the problem, but the problem with is I want the size to be dynamic but also know when content stops fitting on the screen. What could I do about that?
Edit: Fixed this - realised the frame was under a StackPanel (forgot that they break auto height/width).

Controls going outside of window

I'm attempting to make a "information" page, but when I get to a finished product this happens:
Video of application
So as you can see the poster of the movie and the description is fine to start with, but when the user attempts to use a different size than default it doesn't resize so the the user can see the same information.
Code:
<Grid>
<Image
Name="Backdrop"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Stretch="UniformToFill" />
<Grid Background="{ThemeResource SystemControlAcrylicElementBrush}">
<StackPanel Margin="80">
<StackPanel Orientation="Horizontal">
<Button Click="ButtonBase_OnClick" Style="{StaticResource MaterialDesignRaisedLightButton}">
<SymbolIcon Symbol="Back" />
</Button>
<TextBlock
Margin="20,0,0,0"
VerticalAlignment="Center"
Style="{StaticResource TitleTextBlockStyle}"
Text="{x:Bind Movie.Title}" />
</StackPanel>
<Border
Margin="0,10,0,10"
VerticalAlignment="Bottom"
BorderBrush="Gray"
BorderThickness="1"
Style="{StaticResource DownwardDropShadow}" />
<StackPanel
HorizontalAlignment="Center"
VerticalAlignment="Center"
Orientation="Horizontal">
<StackPanel>
<Grid>
<Image
Name="Poster"
MinWidth="200"
MaxWidth="500"
Margin="10" />
<Button
Width="100"
Height="100"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Background="{ThemeResource SystemControlAcrylicElementBrush}"
CornerRadius="100">
<Viewbox MaxWidth="60" MaxHeight="60">
<SymbolIcon Foreground="Gray" Symbol="Play" />
</Viewbox>
</Button>
</Grid>
</StackPanel>
<StackPanel
MinWidth="300"
MaxWidth="600"
Padding="20">
<TextBlock Style="{StaticResource PageTitleStyle}" Text="Information" />
<Border
Margin="0,10,0,10"
VerticalAlignment="Bottom"
BorderBrush="Gray"
BorderThickness="1"
Style="{StaticResource DownwardDropShadow}" />
<TextBlock
Style="{StaticResource BodyTextStyle}"
Text="{x:Bind Movie.Overview}"
TextWrapping="WrapWholeWords" />
</StackPanel>
</StackPanel>
</StackPanel>
</Grid>
</Grid>
So in short, how do I keep the design, but make is so when the window changes size the image & text resizes to stay inside the window and stay visible.
Controls going outside of window
The problem is that when set root panel as StackPanel , the size of children element will be fixed. And it will not change as the window size changes. For solve the this, you could try to use Grid to replace. Please refer the following xaml layout.
<Grid>
<Image
Name="Backdrop"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Source="Assets/hello.jpg"
Stretch="UniformToFill"
/>
<Grid Background="{ThemeResource SystemControlAcrylicElementBrush}">
<Grid Margin="80" >
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="9*" />
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal">
<Button Click="ButtonBase_OnClick">
<SymbolIcon Symbol="Back" />
</Button>
<TextBlock
Margin="20,0,0,0"
VerticalAlignment="Center"
Style="{StaticResource TitleTextBlockStyle}"
Text="Grid Test Page"
/>
</StackPanel>
<Border
Margin="0,10,0,10"
VerticalAlignment="Bottom"
BorderBrush="Gray"
BorderThickness="1"
/>
<Grid
Grid.Row="1"
Margin="0,20,0,0"
HorizontalAlignment="Center"
VerticalAlignment="Top"
>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid>
<Image
Name="Poster"
MinWidth="200"
MaxWidth="500"
Margin="10"
Source="Assets/hello.jpg"
/>
<Button
Width="100"
Height="100"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Background="{ThemeResource SystemControlAcrylicElementBrush}"
CornerRadius="100"
>
<Viewbox MaxWidth="60" MaxHeight="60">
<SymbolIcon Foreground="Gray" Symbol="Play" />
</Viewbox>
</Button>
</Grid>
<StackPanel
Grid.Column="1"
MinWidth="300"
MaxWidth="600"
Padding="20"
>
<TextBlock Text="Information" />
<Border
Margin="0,10,0,10"
VerticalAlignment="Bottom"
BorderBrush="Gray"
BorderThickness="1"
/>
<TextBlock Text="Defines a flexible grid area that consists of columns and rows. Child elements of the Grid are measured and arranged according to their row/column assignments (set by using Grid.Row and Grid.Column attached properties) and other logic." TextWrapping="WrapWholeWords" />
</StackPanel>
</Grid>
</Grid>
</Grid>
</Grid>

GridView ItemTemplate Full Width

My question is: how can I stretch the DataTemplate to the full width of the screen. I've tried many solutions but they does not work.
I've tried HorizontalContentAlignment, setting GridView.ItemContainerStyle and etc. But nothing works. Can anybody explain me how can I do this?
Here is part of my code:
<Grid Style="{StaticResource GeneralAppBackground}">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Pivot x:Name="AccountInfoOptions" Grid.Row="1">
<PivotItem Header="История">
<GridView ItemsSource="{x:Bind CheckoutList}" Margin="5,0,5,0">
<GridView.ItemTemplate>
<DataTemplate x:DataType="data:UserCheckout">
<StackPanel Orientation="Horizontal" BorderBrush="Transparent" Background="White" Padding="5" Margin="0,5,0,0">
<StackPanel Grid.Column="0" Orientation="Vertical" VerticalAlignment="Center" Margin="0,0,10,0">
<TextBlock FontSize="14" Text="{x:Bind CheckoutDate}" Foreground="#979797" />
<TextBlock FontSize="14" Text="{x:Bind CheckoutTime}" Foreground="#979797" />
</StackPanel>
<StackPanel Grid.Column="1" VerticalAlignment="Center">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{x:Bind CheckoutSum}" FontSize="22" FontWeight="Bold" />
<Image Source="/Assets/TengeIcon.png" Width="20" Margin="5,0,0,0"/>
</StackPanel>
<TextBlock Text="{x:Bind CheckoutTitle}" TextAlignment="Center" />
</StackPanel>
</StackPanel>
</DataTemplate>
</GridView.ItemTemplate>
<GridView.ItemContainerStyle>
<Style TargetType="GridViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</GridView.ItemContainerStyle>
</GridView>
</PivotItem>
</Pivot>
The key to making it work, is changing the ItemsPanelTemplate. Define it as a page resource:
<Page.Resources>
<ItemsPanelTemplate x:Key="ItemsPanelTemplate">
<ItemsStackPanel />
</ItemsPanelTemplate>
</Page.Resources>
Now set it as the ItemsPanel for your GridView:
<GridView ItemsSource="{x:Bind CheckoutList}"
Margin="5,0,5,0"
ItemsPanel="{StaticResource ResourceKey=ItemsPanelTemplate}">
This will allow individual items to stretch across the full width. You will still need to replace the root StackPanel in your DataTemplate with a Grid as Nikita suggested:
<DataTemplate x:DataType="local:UserCheckout">
<Grid BorderBrush="Transparent" Background="White" Padding="5" Margin="0,5,0,0">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<StackPanel Grid.Column="0" Orientation="Vertical" VerticalAlignment="Center" Margin="0,0,10,0">
<TextBlock FontSize="14" Text="{x:Bind CheckoutDate}" Foreground="#979797" />
<TextBlock FontSize="14" Text="{x:Bind CheckoutTime}" Foreground="#979797" />
</StackPanel>
<StackPanel Grid.Column="1" VerticalAlignment="Center">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{x:Bind CheckoutSum}" FontSize="22" FontWeight="Bold" />
<Image Source="/Assets/TengeIcon.png" Width="20" Margin="5,0,0,0"/>
</StackPanel>
<TextBlock Text="{x:Bind CheckoutTitle}" TextAlignment="Center" />
</StackPanel>
</Grid>
</DataTemplate>
You already have the Grid.Column property set correctly for the inner StackPanels. It seems you were attempting to use a Grid there before.

Universal App ListView Item HorizontalAlignment

I would like to create a ListView that has right aligned items as well as left aligned. So far in all my attempts with DataTemplates and ItemContainerStyles, I am not able to get this working. The left alignment works fine as that is the default, but I cannot figure out how to get some items right-aligned. For example, this would be similar to a chat/conversation type view like the Windows Phone Messaging app.
My current XAML looks like this:
<Page
x:Class="MDControl.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:MDControl"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<CollectionViewSource x:Name="Messages" Source="{Binding mMessages}"/>
<DataTemplate x:Key="SentMessageTemplate">
<StackPanel Padding="10" Margin="5" Background="Teal" HorizontalAlignment="Right" Width="Auto">
<TextBlock Text="{Binding MessageType}" FontWeight="Bold" TextWrapping="NoWrap" Foreground="White"/>
<TextBlock Text="{Binding MessageBody}" TextWrapping="Wrap" Foreground="White" />
<TextBlock Text="{Binding Timestamp}" TextWrapping="NoWrap" Foreground="White" FontStyle="Italic" FontSize="12"/>
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="ReceivedMessageTemplate">
<StackPanel Padding="10" Margin="5" Background="LightGray">
<TextBlock Text="{Binding MessageType}" FontWeight="Bold" TextWrapping="NoWrap"/>
<TextBlock Text="{Binding MessageBody}" TextWrapping="Wrap"/>
<TextBlock Text="{Binding Timestamp}" TextWrapping="NoWrap" TextAlignment="Right" FontStyle="Italic" FontSize="12"/>
</StackPanel>
</DataTemplate>
<Style TargetType="ListViewItem" x:Key="SentMessageStyle">
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
</Style>
<Style TargetType="ListViewItem" x:Key="ReceivedMessageStyle">
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
</Style>
<local:MessageListTemplateSelector x:Key="MessageListTemplateSelector"
SentMessageTemplate="{StaticResource SentMessageTemplate}"
ReceivedMessageTemplate="{StaticResource ReceivedMessageTemplate}">
</local:MessageListTemplateSelector>
<local:MessageListContainerStyleSelector x:Key="MessageListContainerStyleSelector"
SentMessageStyle="{StaticResource SentMessageStyle}"
ReceivedMessageStyle="{StaticResource ReceivedMessageStyle}">
</local:MessageListContainerStyleSelector>
</Page.Resources>
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<ListView x:Name="messageList" ScrollViewer.VerticalScrollBarVisibility="Visible" ItemContainerStyleSelector="{StaticResource MessageListContainerStyleSelector}" ItemsSource="{Binding Source={StaticResource Messages}}" ItemTemplateSelector="{StaticResource MessageListTemplateSelector}" Margin="10,120,10,50" VerticalAlignment="Bottom" IsDoubleTapEnabled="False"/>
</Grid>
What can I change to get the "Sent" messages to be right aligned? Currently they show up with a Teal background which I want, but they are still Left aligned instead of Right. I am a little new to XAML, so forgive me if I'm way off here.
UPDATE: Solution
Grids were the key, I ended up having to use multiple grids to achieve the correct right-alignment, in conjunction with an ItemContainerStyle setting the HorizontalContentAlignment.
<Page
x:Class="MDControl.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:MDControl"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<CollectionViewSource x:Name="Messages" Source="{Binding mMessages}"/>
<DataTemplate x:Key="SentMessageTemplate">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid Height="Auto" Grid.Row="1" Margin="5" HorizontalAlignment="Right">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<StackPanel Padding="10" Background="Teal">
<TextBlock Text="{Binding MessageType}" FontWeight="Bold" TextWrapping="NoWrap" Foreground="White" />
<TextBlock Text="{Binding MessageBody}" TextWrapping="Wrap" Foreground="White" />
<TextBlock Text="{Binding Timestamp}" TextWrapping="NoWrap" Foreground="White" FontStyle="Italic" FontSize="12" HorizontalAlignment="Right"/>
</StackPanel>
</Grid>
</Grid>
</DataTemplate>
<DataTemplate x:Key="ReceivedMessageTemplate">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid Height="Auto" Grid.Row="1" Margin="5" HorizontalAlignment="Left">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<StackPanel Padding="10" Background="LightGray">
<TextBlock Text="{Binding MessageType}" FontWeight="Bold" TextWrapping="NoWrap" />
<TextBlock Text="{Binding MessageBody}" TextWrapping="Wrap" />
<TextBlock Text="{Binding Timestamp}" TextWrapping="NoWrap" FontStyle="Italic" FontSize="12" HorizontalAlignment="Right"/>
</StackPanel>
</Grid>
</Grid>
</DataTemplate>
<local:MessageListTemplateSelector x:Key="MessageListTemplateSelector"
SentMessageTemplate="{StaticResource SentMessageTemplate}"
ReceivedMessageTemplate="{StaticResource ReceivedMessageTemplate}">
</local:MessageListTemplateSelector>
</Page.Resources>
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<ListView x:Name="messageList" ScrollViewer.VerticalScrollBarVisibility="Visible" ItemsSource="{Binding Source={StaticResource Messages}}" ItemTemplateSelector="{StaticResource MessageListTemplateSelector}" Margin="10,120,10,50" VerticalAlignment="Bottom" IsDoubleTapEnabled="False">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
</Style>
</ListView.ItemContainerStyle>
</ListView>
</Grid>
The problem is in your DataTemplates , not in styles or etc.You must use Grid instead of Stackpanel in your DataTemplate to achieve that.
Stackpanels won't stretch to parent.They'll only get the width / height of all controls inside it.Try something like
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
You should use HorizontalAlignment property which defines the position of the element inside a parent element.<Grid x:Name="simpleGrid" height = 50 width = 100 HorizontalAlignment="right" />

QT spacer equivalent in WPF

I have a StackPanel with some vertically alligned controls (stackpanel on the right in this picture:
The last control should always be placed at the bottom of the window inside of the border control (The OK button on the picture). In QT I'd insert a spacer control to push the button down. How do I do that in WPF? Thank you. Here is the xaml:
<Window x:Class="Test.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="354*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Border Margin="5" Background="Gray" CornerRadius="6" BorderBrush="Gray">
<Viewport3D Grid.Column="0" Name="viewport" ClipToBounds="True">
</Viewport3D>
</Border>
<Border Grid.Column="1" CornerRadius="6" BorderBrush="Gray" Background="LightGray" BorderThickness="1" Margin="5" HorizontalAlignment="Left" Name="border1" VerticalAlignment="Stretch" >
<StackPanel>
<StackPanel Orientation="Horizontal">
<Label Content="Dimension" Name="label1" VerticalAlignment="Center" />
<ComboBox Text="3D" HorizontalAlignment="Right" Name="dimensioncb" VerticalAlignment="Center" IsReadOnly="True" IsEditable="True">
<ComboBoxItem>2D</ComboBoxItem>
<ComboBoxItem>3D</ComboBoxItem>
</ComboBox>
</StackPanel>
<Separator/>
<DockPanel>
<Label Content="Iteration" Name="label2" VerticalAlignment="Center" />
<ComboBox Text="3" HorizontalAlignment="Right" Name="iterationcb" VerticalAlignment="Center" IsReadOnly="True" IsEditable="True">
<ComboBoxItem>1</ComboBoxItem>
<ComboBoxItem>2</ComboBoxItem>
<ComboBoxItem>3</ComboBoxItem>
<ComboBoxItem>4</ComboBoxItem>
<ComboBoxItem>5</ComboBoxItem>
<ComboBoxItem>6</ComboBoxItem>
<ComboBoxItem>7</ComboBoxItem>
<ComboBoxItem>8</ComboBoxItem>
</ComboBox>
</DockPanel>
<Button Content="OK" VerticalAlignment="Bottom"/>
</StackPanel>
</Border>
</Grid>
</Window>
There are a bunch of ways that you can accomplish this in WPF. Shown below is one:
<Border Grid.Column="1" CornerRadius="6" BorderBrush="Gray" Background="LightGray" BorderThickness="1" Margin="5" HorizontalAlignment="Left" Name="border1" VerticalAlignment="Stretch" >
<!--Add a grid control to separate your stackpanel and button-->
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<StackPanel Grid.Row="0">
<StackPanel Orientation="Horizontal">
<Label Content="Dimension" Name="label1" VerticalAlignment="Center" />
<ComboBox Text="3D" HorizontalAlignment="Right" Name="dimensioncb" VerticalAlignment="Center" IsReadOnly="True" IsEditable="True">
<ComboBoxItem>2D</ComboBoxItem>
<ComboBoxItem>3D</ComboBoxItem>
</ComboBox>
</StackPanel>
<Separator/>
<DockPanel>
<Label Content="Iteration" Name="label2" VerticalAlignment="Center" />
<ComboBox Text="3" HorizontalAlignment="Right" Name="iterationcb" VerticalAlignment="Center" IsReadOnly="True" IsEditable="True">
<ComboBoxItem>1</ComboBoxItem>
<ComboBoxItem>2</ComboBoxItem>
<ComboBoxItem>3</ComboBoxItem>
<ComboBoxItem>4</ComboBoxItem>
<ComboBoxItem>5</ComboBoxItem>
<ComboBoxItem>6</ComboBoxItem>
<ComboBoxItem>7</ComboBoxItem>
<ComboBoxItem>8</ComboBoxItem>
</ComboBox>
</DockPanel>
</StackPanel>
<Button Grid.Row="1" Content="OK" VerticalAlignment="Bottom"/>
</Grid>
</Border>
The above XAML, used to replace the right-hand Border in your XAML will produce the following result, and will keep the button on the bottom when re-sizing the window.