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The WPF Podcatcher Series - Part 2 (Structural Skinning)

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5 Mar 2008CPOL16 min read 253.4K   7.2K   166  
The second article in a series devoted to a WPF application that plays streaming audio podcasts off the Internet. This article discusses the idea and implementation of look-less applications.
<UserControl 
  x:Class="Podder.DefaultSkin.Views.PodcastsControlView"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:podder="clr-namespace:Podder"
  Background="{DynamicResource PrimaryViewBackBrush}"
  >
  <UserControl.Resources>
    <!-- This Storyboard is used when a new podcast is added to the list. -->
    <Storyboard x:Key="STORYBOARD_PodcastAdded">
      <ColorAnimation 
        Completed="OnPodcastAddedAnimationCompleted" 
        Duration="0:0:0.5"
        FillBehavior="Stop"
        Storyboard.TargetName="_feedTextBox"
        Storyboard.TargetProperty="Foreground.Color"
        To="Transparent"   
        />
    </Storyboard>

    <!-- This Storyboard is used when a podcast feed URL does not point to a valid feed. -->
    <Storyboard x:Key="STORYBOARD_FeedValidationFailed" RepeatBehavior="3x">
      <ColorAnimation 
        AutoReverse="True"
        Duration="0:0:0.5"
        FillBehavior="Stop"
        Storyboard.TargetName="_feedTextBox"
        Storyboard.TargetProperty="Foreground.Color"
        To="Red"   
        />
    </Storyboard>
  </UserControl.Resources>
  <Grid Margin="4">

    <Grid.RowDefinitions>
      <RowDefinition Height="Auto" />
      <RowDefinition Height="*" />
      <RowDefinition Height="Auto" />
      <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>

    <DockPanel DataContext="{Binding Path=SourceCollection.NewPodcastInfo}" Grid.Row="0" Margin="4">
      <DockPanel DockPanel.Dock="Top">
        <TextBlock DockPanel.Dock="Left" Text="{podder:ResourceString PodcastMgmt_AddNewRssFeedHeader}" />
        <Button Content="{podder:ResourceString PodcastMgmt_AddButtonText}" Command="New" DockPanel.Dock="Right" HorizontalAlignment="Center" IsDefault="True" Padding="8,0"  />
        <TextBox x:Name="_feedTextBox" Margin="4,0" Text="{Binding Path=FeedUrl, UpdateSourceTrigger=PropertyChanged}" />
      </DockPanel>
      <TextBlock FontStyle="Italic" Text="{Binding Path=StatusMessage}" TextAlignment="Center" />
    </DockPanel>

    <ListBox 
      x:Name="_podcastsListBox" 
      Grid.Row="1" 
      IsSynchronizedWithCurrentItem="True" 
      ItemsSource="{Binding Path=.}"
      Margin="0,4"  
      MinHeight="120" 
      />

    <Button Grid.Row="2" Content="{podder:ResourceString PodcastMgmt_RemoveButtonText}" Command="Delete" HorizontalAlignment="Center" Padding="8,0" />

    <Expander Grid.Row="3" Header="{podder:ResourceString PodcastMgmt_PodcastDetailsAreaHeader}" IsExpanded="True">
      <Grid DataContext="{Binding ElementName=_podcastsListBox, Path=SelectedItem}" Margin="4">
        <Grid.Style>
          <Style TargetType="Grid">
            <Setter Property="Background" Value="{DynamicResource GroupBoxBackBrush}" />
            <Style.Triggers>
              <DataTrigger Binding="{Binding ElementName=_podcastsListBox, Path=SelectedItem}" Value="{x:Null}">
                <Setter Property="IsEnabled" Value="False" />
              </DataTrigger>
            </Style.Triggers>
          </Style>
        </Grid.Style>
        <Grid.ColumnDefinitions>
          <ColumnDefinition Width="Auto" />
          <ColumnDefinition Width="8" />
          <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <Grid.RowDefinitions>
          <RowDefinition Height="Auto" />
          <RowDefinition Height="Auto" />
          <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Image Grid.Row="0" Grid.Column="0" Margin="4" Width="190" Height="190" Source="Images\ImageNotAvailable.jpg" />
        <Image Grid.Row="0" Grid.Column="0" Margin="4" Width="190" Height="190" Source="{Binding Path=ImageUrl, IsAsync=True}" />

        <TextBlock 
          Grid.Row="0" Grid.Column="2" 
          Margin="4" 
          MaxHeight="200" 
          Text="{Binding Path=Description}" 
          TextWrapping="Wrap" 
          />
        
        <TextBlock Grid.Row="1" Grid.Column="0" HorizontalAlignment="Right" Margin="4" Text="{podder:ResourceString PodcastMgmt_PodcastNameHeader}" />
        <TextBox Grid.Row="1" Grid.Column="2" Margin="4" Text="{Binding Path=Name, Mode=OneWay}" IsReadOnly="True" />

        <TextBlock Grid.Row="2" Grid.Column="0" HorizontalAlignment="Right" Margin="4" Text="{podder:ResourceString PodcastMgmt_RssFeedNameHeader}" />
        <TextBox Grid.Row="2" Grid.Column="2" Margin="4" Text="{Binding Path=RssUrl, Mode=OneWay}" IsReadOnly="True" />  
        
        <TextBlock Grid.Row="2" Grid.Column="0" HorizontalAlignment="Left" Margin="4" ToolTip="{podder:ResourceString PodcastMgmt_WebSiteHyperlinkTooltip}">
          <Hyperlink Command="Open" CommandParameter="{Binding Path=Link}">
            <TextBlock Text="{podder:ResourceString PodcastMgmt_WebSiteHyperlinkText}" />
          </Hyperlink>
        </TextBlock>
      </Grid>
    </Expander>

  </Grid>
</UserControl>

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Software Developer (Senior)
United States United States
Josh creates software, for iOS and Windows.

He works at Black Pixel as a Senior Developer.

Read his iOS Programming for .NET Developers[^] book to learn how to write iPhone and iPad apps by leveraging your existing .NET skills.

Use his Master WPF[^] app on your iPhone to sharpen your WPF skills on the go.

Check out his Advanced MVVM[^] book.

Visit his WPF blog[^] or stop by his iOS blog[^].

See his website Josh Smith Digital[^].

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