4. Labor segédanyagok

<Style x:Key="PageHeaderTextBlockStyle" TargetType="TextBlock" BasedOn="{StaticResource HeaderTextBlockStyle}">
    <Setter Property="TextWrapping" Value="NoWrap"/>
    <Setter Property="VerticalAlignment" Value="Bottom"/>
    <Setter Property="Margin" Value="116,0,0,36"/>
</Style>

<Grid.RowDefinitions>
    <RowDefinition Height="Auto" />
    <RowDefinition Height="*" />
</Grid.RowDefinitions>
<StackPanel Orientation="Vertical" Grid.Row="0">
    <TextBlock Text="UNIVERSAL COOKBOOK" Style="{StaticResource ApplicationTitleTextBlockStyle}"/>
    <TextBlock Text="Recipes" Style="{StaticResource PageHeaderTextBlockStyle}"/>
</StackPanel>

<Style x:Key="PageHeaderTextBlockStyle" TargetType="TextBlock" BasedOn="{StaticResource HeaderTextBlockStyle}">
    <Setter Property="TextWrapping" Value="NoWrap"/>
    <Setter Property="Margin" Value="24,0,0,6"/>
    <Setter Property="Padding" Value="0"/>
    <Setter Property="VerticalAlignment" Value="Top"/>
</Style>
<Style x:Key="ApplicationTitleTextBlockStyle" TargetType="TextBlock" BasedOn="{StaticResource TitleTextBlockStyle}">
    <Setter Property="TextWrapping" Value="NoWrap"/>
    <Setter Property="VerticalAlignment" Value="Top"/>
    <Setter Property="FontWeight" Value="ExtraBold"/>
    <Setter Property="Margin" Value="24,6,0,0"/>
    <Setter Property="Padding" Value="0"/>
</Style>

private async void HardwareButtonsOnBackPressed(object sender, BackPressedEventArgs args)
{
    args.Handled = true;
    var dialog = new MessageDialog("Are you sure that you want to exit?", "Exit confirmation");
    dialog.Commands.Add(new UICommand("Exit", command => Application.Current.Exit()));
    dialog.Commands.Add(new UICommand("Cancel", command => { }));
    dialog.DefaultCommandIndex = 0;
    dialog.CancelCommandIndex = 1;
    await dialog.ShowAsync();
}

public class VariableSizedGridView : GridView
{
    protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
    {
    var supportItem = item as ISupportVariableSizedWrapGrid;
    if (supportItem != null)
        {
            element.SetValue(VariableSizedWrapGrid.ColumnSpanProperty, supportItem.ColumnSpan);
            element.SetValue(VariableSizedWrapGrid.RowSpanProperty, supportItem.RowSpan);
        }
    base.PrepareContainerForItemOverride(element, item);
    }
}

partial void PartialOnNavigatedTo(NavigationEventArgs e)
{
    for (int i = 0; i < RecipeGroups.Count; i++)
    {
    var first = RecipeGroups[i].Recipes.First();
    if (i % 2 == 0)
            first.ColumnSpan = 2;
    else
            first.RowSpan = 2;
    }
    recipesViewSource.Source = RecipeGroups;
}

<DataTemplate x:Key="RecipeHeaderTemplate">
    <Grid HorizontalAlignment="Left" Width="250" Height="250">
        <Image Source="{Binding BackgroundImage}" Stretch="UniformToFill" />
        <Border VerticalAlignment="Bottom" Background="#AA000000">
            <TextBlock Text="{Binding Title}" Style="{StaticResource TitleTextBlockStyle}" Height="30" Margin="15,0,15,0"/>
        </Border>
    </Grid>
</DataTemplate>