public void SetResult(Object result)
{
if (!IsCompleted)
{
IsCompleted = true;
if (!CompletionSource.Task.IsCompleted)
{
CompletionSource.SetResult(result);
}
}
}
public void SetCompleted()
{
CompletionSource.SetResult(Responses);
}
protected override void Success(IConsumeContext <TResponse> context)
{
CompletionSource.SetResult(context.Message);
}
public override void Execute()
{
_command();
CompletionSource.SetResult(null);
}
public override void Execute()
{
CompletionSource.SetResult(_query()?.Copy());
}
/// <summary> /// Sets the <typeparamref name="TResult"/> result that invocations will receive. /// </summary> /// <param name="result"></param> public void SetResult(TResult result) => CompletionSource.SetResult(result);
public ItemSelectorPage()
{
InitializeComponent();
nav = DependencyService.Get <INavigation>(DependencyFetchTarget.GlobalInstance);
this.BindingContext = this;
selectButton.Clicked += async(s, e) => {
if (valueSelected)
{
return;
}
valueSelected = true;
INavigation nav = DependencyService.Get <INavigation>(DependencyFetchTarget.GlobalInstance);
await nav.PopModalAsync();
CompletionSource.SetResult(SelectedItem);
};
cancelButton.Clicked += async(s, e) => {
if (valueSelected)
{
return;
}
valueSelected = true;
await nav.PopModalAsync();
CompletionSource.SetResult(previousSelection);
};
searchBar.TextChanged += (s, e) => {
FilterItems();
};
Device.BeginInvokeOnMainThread(async() => {
await Task.Delay(1);
FilterItems();
previousSelection = SelectedItem;
if (ItemTemplate != null)
{
listView.ItemTemplate = new DataTemplate(() =>
{
var c = ItemTemplate.CreateContent() as View;
return(new ViewCell {
View = c
});
});
}
/* we don't want to look for ItemSelected event immediately
* because SelectedItem is set by binding framework after initialization,
* there is no way to detect human selection over default selection*/
await Task.Delay(100);
listView.ItemSelected += async(s, e) => {
if (valueSelected)
{
return;
}
valueSelected = true;
// delay to display little animation...
await Task.Delay(500);
await nav.PopModalAsync(true);
CompletionSource.SetResult(e.SelectedItem);
};
});
if (AddNew != null)
{
selectButton.IsVisible = true;
Grid.SetColumnSpan(cancelButton, 1);
}
else
{
selectButton.IsVisible = false;
Grid.SetColumnSpan(cancelButton, 2);
}
}
