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POWPF: Sizing images inside grid and listbox
 

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  1. POWPF: Sizing images inside grid and listbox
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    <p>I have a ListBox with horizontal scrolling, and each item consists of a two row grid. The first row contains an image, and the second row a border used to render a reflection of the first.<br> (Yeah, yeah. I know. Yet another coverflow attempt...)</p> <p>I need some help with the sizing of the images. If I don't specify any size, it will render the image at full size, but I want it to be restricted by height of the grid row. If the window resizes, the images should resize.</p> <p>Any clues?</p> <p><strong>Update:</strong><br> I have now changed the code a little. First of all I have removed a unnecessary trigger, but the important part is </p> <ul> <li>Disabled vertical scrollbar on listbox. </li> <li>Removed height on coverImage</li> <li>Changed from layoutTransformation to RenderTransformation</li> <li>Shrink non-selected item instead of scaling selected item.</li> </ul> <p>This gives me nearly what I want. There is a gap between the coverImage and the coverReflection that I cant find a reason for. Any clues for that, og maybe I should post a new question...?</p> <p><strong>Second Update:</strong><br> I think I have a solution for the reflection-gap to now. It feels a little awkward, though. I guess there are better ways of doing it.</p> <p>What I've done is - I'm no longer flipping the border, I'm flipping the visual brush instead. - I have added a TileMode="Tile" for the visual brush</p> <p>Now, I'm not sure why this works, but it's coming close to what I want, so...</p> <pre><code>&lt;Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="UntitledProject1.Window1" x:Name="Window" Title="Window1" Width="801" Height="786"&gt; &lt;Window.Resources&gt; &lt;XmlDataProvider x:Key="dataProvider" XPath="Bilder"&gt; &lt;x:XData&gt; &lt;Bilder xmlns=""&gt; &lt;Bilde&gt;75760-1_-8589666289339775808.jpg&lt;/Bilde&gt; &lt;Bilde&gt;73255-3_-8589662994232744558.jpg&lt;/Bilde&gt; &lt;Bilde&gt;75760-1_-8589666289339775808.jpg&lt;/Bilde&gt; &lt;Bilde&gt;73255-3_-8589662994232744558.jpg&lt;/Bilde&gt; &lt;Bilde&gt;75760-1_-8589666289339775808.jpg&lt;/Bilde&gt; &lt;Bilde&gt;73255-3_-8589662994232744558.jpg&lt;/Bilde&gt; &lt;/Bilder&gt; &lt;/x:XData&gt; &lt;/XmlDataProvider&gt; &lt;ControlTemplate x:Key="listControlTemplate" TargetType="{x:Type ListBoxItem}"&gt; &lt;Grid x:Name="listItemGrid"&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition/&gt; &lt;RowDefinition/&gt; &lt;/Grid.RowDefinitions&gt; &lt;Image x:Name="coverImage" Source="{Binding Path=InnerText}" Stretch="Uniform" HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Grid.Row="0" RenderTransformOrigin="0.5,1"&gt; &lt;Image.RenderTransform&gt; &lt;TransformGroup&gt; &lt;ScaleTransform ScaleX="0.7" ScaleY="0.7"/&gt; &lt;SkewTransform AngleX="0" AngleY="0"/&gt; &lt;RotateTransform Angle="0"/&gt; &lt;TranslateTransform X="0" Y="0"/&gt; &lt;/TransformGroup&gt; &lt;/Image.RenderTransform&gt; &lt;/Image&gt; &lt;Border x:Name="coverReflection" RenderTransformOrigin="0.5,0" Height="{Binding Path=ActualHeight, ElementName=coverImage, Mode= Default}" VerticalAlignment="Top" Grid.Row="1" &gt; &lt;Border.OpacityMask&gt; &lt;LinearGradientBrush EndPoint="0.0,1" StartPoint="0.0,0"&gt; &lt;GradientStop Color="#00000000" Offset="0.6"/&gt; &lt;GradientStop Color="#BBFFFFFF" Offset="0"/&gt; &lt;/LinearGradientBrush&gt; &lt;/Border.OpacityMask&gt; &lt;Border.RenderTransform&gt; &lt;TransformGroup&gt; &lt;ScaleTransform ScaleX="0.7" ScaleY="0.7"/&gt; &lt;SkewTransform AngleX="0" AngleY="0"/&gt; &lt;RotateTransform Angle="0"/&gt; &lt;TranslateTransform X="0" Y="0"/&gt; &lt;/TransformGroup&gt; &lt;/Border.RenderTransform&gt; &lt;Border.Background&gt; &lt;VisualBrush Visual="{Binding ElementName=coverImage}" TileMode="Tile"&gt; &lt;VisualBrush.Transform&gt; &lt;TransformGroup&gt; &lt;ScaleTransform ScaleX="1" ScaleY="-1"/&gt; &lt;SkewTransform AngleX="0" AngleY="0"/&gt; &lt;RotateTransform Angle="0"/&gt; &lt;TranslateTransform X="0" Y="0"/&gt; &lt;/TransformGroup&gt; &lt;/VisualBrush.Transform&gt; &lt;/VisualBrush&gt; &lt;/Border.Background&gt; &lt;/Border&gt; &lt;/Grid&gt; &lt;ControlTemplate.Triggers&gt; &lt;Trigger Property="IsSelected" Value="True"&gt; &lt;Setter Property="RenderTransform" TargetName="coverImage"&gt; &lt;Setter.Value&gt; &lt;TransformGroup&gt; &lt;ScaleTransform ScaleX="1" ScaleY="1"/&gt; &lt;SkewTransform AngleX="0" AngleY="0"/&gt; &lt;RotateTransform Angle="0"/&gt; &lt;TranslateTransform X="0" Y="0"/&gt; &lt;/TransformGroup&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;Setter Property="RenderTransform" TargetName="coverReflection"&gt; &lt;Setter.Value&gt; &lt;TransformGroup&gt; &lt;ScaleTransform ScaleX="1" ScaleY="1"/&gt; &lt;SkewTransform AngleX="0" AngleY="0"/&gt; &lt;RotateTransform Angle="0"/&gt; &lt;TranslateTransform X="0" Y="0"/&gt; &lt;/TransformGroup&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Trigger&gt; &lt;/ControlTemplate.Triggers&gt; &lt;/ControlTemplate&gt; &lt;Style TargetType="{x:Type ListBoxItem}" x:Key="listStyle"&gt; &lt;Setter Property="Template" Value="{StaticResource listControlTemplate}" /&gt; &lt;/Style&gt; &lt;/Window.Resources&gt; &lt;Window.BindingGroup&gt; &lt;BindingGroup/&gt; &lt;/Window.BindingGroup&gt; &lt;Grid x:Name="LayoutRoot" DataContext="{Binding Source={StaticResource dataProvider}, XPath=/Bilder/Bilde}"&gt; &lt;ListBox ScrollViewer.HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Disabled" ItemsSource="{Binding }" IsSynchronizedWithCurrentItem="True" Background="#FF000000" ItemContainerStyle="{StaticResource listStyle}" VerticalAlignment="Stretch" &gt; &lt;ListBox.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;VirtualizingStackPanel IsItemsHost="True" Orientation="Horizontal" /&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ListBox.ItemsPanel&gt; &lt;/ListBox&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre>
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