WPF Book Reader

<Window x:Class="BookReader.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ucc="clr-namespace:BookReader"    
    xmlns:local="clr-namespace:BookReader"
    Title="Book Reader" Height="400" Width="800" Loaded="Window_Loaded" WindowStyle="SingleBorderWindow" WindowState="Normal" 
        Closing="Window_Closing">
    <Grid Name="MainGrid">
        <Grid.RowDefinitions>
            <RowDefinition Height="40" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <ToolBar Height="36" Margin="-3,0,0,0">
            <Button Name="btnOpen" HorizontalAlignment="Stretch" Click="btnOpen_Click" Width="30" Margin="5,0,0,0" ToolTip="Open a book everywhere on your disks">
                <Image Source="Resources\open_folder.png"></Image>
            </Button>
            <Button Name="btnFullScreen" HorizontalAlignment="Stretch" Click="btnFullScreen_Click" Width="30" Margin="5,0,0,0" ToolTip="Put Book Reader in full screen mode and hide explorers">
                <Image Source="Resources\ecran.png"></Image>
            </Button>
            <Button Name="btnRefresh" HorizontalAlignment="Stretch" Click="btnRefresh_Click" Width="30" Margin="5,0,5,0" ToolTip="Refresh the catalog by a full scan of the folder">
                <Image Source="Resources\refresh.png"></Image>
            </Button>
            <Button Name="btnOptions" Width="30" Click="btnOptions_Click" ToolTip="Display the options dialog" >
                    <Image Source="Resources\tools.png"></Image>
            </Button>
            <Separator Width="3"></Separator>
            <Button Name="bntQuit" HorizontalAlignment="Stretch" Click="btnQuit_Click" Width="30" Margin="5,0,0,0" ToolTip="Close Book Reader">
                <Image Source="Resources\exit.png"></Image>
            </Button>
            <Button Name="bntAbout" Click="btnAbout_Click" Width="30" Margin="5,0,5,0" ToolTip="About the author and Acknowlegdments">
                <Image Source="Resources\info.png"></Image>
            </Button>
            <Separator Width="3"></Separator>
            <Button Name="bntFitWidth" Click="btnFitWidth_Click" Width="30" Margin="5,0,0,0" ToolTip="Fit the display to the page width">
                <Image Source="Resources\FitWidth.png"></Image>
            </Button>
            <Button Name="bntFitHeight" Click="btnFitHeight_Click" Width="30" Margin="5,0,5,0" ToolTip="Fit the display to the page height">
                <Image Source="Resources\FitHeight.png"></Image>
            </Button>
            <Separator Width="3"></Separator>
            <Button Name="bntConvertPDF" Width="30" Margin="5,0,5,0" ToolTip="Convert a PDF to CBZ/CBR" Click="bntConvertPDF_Click">
                <Image Source="Resources\acroread.png"></Image>
            </Button>
            <Separator Width="3"></Separator>
            <Slider Name="zoomSlider" Minimum="1" Maximum="400" SmallChange="1" TickPlacement="None"
                    Value="100" Width="200" VerticalAlignment="Center" ValueChanged="Slider_ValueChanged"
                    LargeChange="10" IsSnapToTickEnabled="True" Focusable="False"></Slider>
            <Label Name="zoomPercent" Margin="5,0,0,0" VerticalAlignment="Center" Content="{Binding ElementName=zoomSlider, Path=Value}"></Label>
            <Label Margin="5,0,0,0" VerticalAlignment="Center">%</Label>
            <Separator Width="3"></Separator>
            <Label Name="Info" VerticalAlignment="Center" HorizontalAlignment="Stretch" IsHitTestVisible="False" Margin="5,0,0,0" ToolTip="Get information about the image cache">No cache info available</Label>
            <Separator Width="3"></Separator>
            <Label Name="PageInfo" VerticalAlignment="Center" HorizontalAlignment="Stretch" IsHitTestVisible="False" Margin="5,0,0,0" ToolTip="Display the current page displayed">No displayed page</Label>
        </ToolBar>
        <Grid Grid.Row="1">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="200"/>
                <ColumnDefinition Width="20"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
        <ListBox Grid.Column="0" BorderThickness="0"
              VirtualizingStackPanel.IsVirtualizing="True"
              IsSynchronizedWithCurrentItem="True"
              Name="CatalogListBox" 
              SelectionMode="Single" 
              ItemsSource="{Binding}" 
              SelectedIndex="0"
              Style="{DynamicResource CatalogCoverStyle}"
                >
        <ListBox.ContextMenu>
            <ContextMenu>
                <MenuItem Header="Read" Click="MenuItem_Load" />
                <MenuItem Header="Set bookmark" Click="MenuItem_BookMark"/>
                <MenuItem Header="Goto bookmark" Click="MenuItem_GotoBookMark"
                         Visibility="{Binding Path=Bookmark, Converter={StaticResource BookmarkToVisibilityConverter}}"/>
                <MenuItem Header="Clear bookmark" Click="MenuItem_ClearBookMark"
                         Visibility="{Binding Path=Bookmark, Converter={StaticResource BookmarkToVisibilityConverter}}"/>
            </ContextMenu>
        </ListBox.ContextMenu>
        </ListBox>
        <ucc:GridSplitterExpander Grid.Column="1" Orientation="Vertical" Title="Catalog's covers" GridIndex="0" 
            x:Name="Splitter" Background="{DynamicResource ControlBackgroundBrush}"/>
        <local:PageViewer x:Name="SimplePageView" Grid.Column="2" 
                          PageChanged="SimplePageView_PageChanged"
                          ZoomChanged="SimplePageView_ZoomChanged" />
        </Grid>
    </Grid>
</Window>