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using System.Threading.Tasks;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media;
#if WINDOWS_UWP
namespace Xamarin.Forms.Platform.UWP
#else
namespace Xamarin.Forms.Platform.WinRT
#endif
{
public class FormsPivot : Pivot, IToolbarProvider
{
public static readonly DependencyProperty ToolbarVisibilityProperty = DependencyProperty.Register("ToolbarVisibility", typeof(Visibility), typeof(FormsPivot),
new PropertyMetadata(Visibility.Collapsed));
public static readonly DependencyProperty ToolbarForegroundProperty = DependencyProperty.Register("ToolbarForeground", typeof(Brush), typeof(FormsPivot), new PropertyMetadata(default(Brush)));
public static readonly DependencyProperty ToolbarBackgroundProperty = DependencyProperty.Register("ToolbarBackground", typeof(Brush), typeof(FormsPivot), new PropertyMetadata(default(Brush)));
CommandBar _commandBar;
TaskCompletionSource<CommandBar> _commandBarTcs;
public Brush ToolbarBackground
{
get { return (Brush)GetValue(ToolbarBackgroundProperty); }
set { SetValue(ToolbarBackgroundProperty, value); }
}
public Brush ToolbarForeground
{
get { return (Brush)GetValue(ToolbarForegroundProperty); }
set { SetValue(ToolbarForegroundProperty, value); }
}
public Visibility ToolbarVisibility
{
get { return (Visibility)GetValue(ToolbarVisibilityProperty); }
set { SetValue(ToolbarVisibilityProperty, value); }
}
Task<CommandBar> IToolbarProvider.GetCommandBarAsync()
{
if (_commandBar != null)
return Task.FromResult(_commandBar);
_commandBarTcs = new TaskCompletionSource<CommandBar>();
ApplyTemplate();
return _commandBarTcs.Task;
}
protected override void OnApplyTemplate()
{
base.OnApplyTemplate();
_commandBar = GetTemplateChild("CommandBar") as CommandBar;
TaskCompletionSource<CommandBar> tcs = _commandBarTcs;
if (tcs != null)
{
tcs.SetResult(_commandBar);
}
}
}
}
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