I decided to address this via a quick custom converter for now:
using System;
using System.Globalization;
using System.Windows.Controls;
using System.Windows.Data;
using Microsoft.Phone.Controls;
namespace RiverBuddy.Converters
{
// ScrollViewer.VerticalScrollBarVisibility="{Binding Orientation, ElementName=uxPage, Mode=OneWay, Converter={StaticResource ScrollConverter}}">
public class NoScrollIfPortraitConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
//Debug.WriteLine("convert");
var orient = (PageOrientation)value;
var vis = (orient == PageOrientation.Portrait || orient == PageOrientation.PortraitDown || orient == PageOrientation.PortraitUp)
? ScrollBarVisibility.Disabled : ScrollBarVisibility.Auto;
return vis;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return null;
}
}
}
There was no need for me to convert back the other direction. The View then consumes the converter as follows:
<Views:PhoneApplicationPageBase
x:Class="RiverBuddy.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
d:DataContext="{d:DesignData SampleData/MainViewModelSampleData.xaml}"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WP7"
xmlns:Views="clr-namespace:RiverBuddy.Views"
xmlns:Converters="clr-namespace:RiverBuddy.Converters" FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="PortraitOrLandscape" Orientation="Portrait"
mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
shell:SystemTray.IsVisible="True" x:Name="uxPage">
<Views:PhoneApplicationPageBase.Resources>
<Converters:NoScrollIfPortraitConverter x:Key="ScrollConverter"/>
</Views:PhoneApplicationPageBase.Resources>
<Grid x:Name="LayoutRoot">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.Background>
<ImageBrush ImageSource="/Images/HomeBackground.png"/>
</Grid.Background>
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="24,24,0,12">
<TextBlock x:Name="ApplicationTitle" Text="River Buddy" Foreground="White" Margin="-10,0" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="ListTitle" Text="Home" Margin="-10,0" Foreground="White" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<Grid x:Name="ContentPanel" Grid.Row="1">
<ListBox x:Name="MainListBox" ItemsSource="{Binding Items}" SelectionChanged="MainListBox_SelectionChanged"
ScrollViewer.VerticalScrollBarVisibility="{Binding Orientation, ElementName=uxPage, Mode=OneWay, Converter={StaticResource ScrollConverter}}">
<i:Interaction.Triggers>
<i:EventTrigger EventName="SelectionChanged" >
<cmd:EventToCommand Command="{Binding MenuItemSelected}" PassEventArgsToCommand="True"/>
</i:EventTrigger>
</i:Interaction.Triggers>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel x:Name="DataTemplateStackPanel" Orientation="Horizontal">
<Image x:Name="ItemImage" Source="{Binding Image}" Height="43" Width="43" VerticalAlignment="Top" Margin="10,0,20,0"/>
<StackPanel>
<TextBlock x:Name="ItemText" Text="{Binding LineOne}" Margin="-2,-13,0,0"
Foreground="White" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
<!-- removed PhoneTextAccent style now b/c of custom background-->
<TextBlock x:Name="DetailsText" Text="{Binding LineTwo}" Opacity="0.65" Margin="0,-6,0,13"
Style="{StaticResource PhoneTextAccentStyle}" Foreground="Yellow"/>
</StackPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</Grid>
</Views:PhoneApplicationPageBase>
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