// Set next item in carousel view
private void ShowNext(object sender, System.EventArgs e)
{
if (Carousel.Position != Carousel.ItemsSource.Count() - 1)
{
Carousel.ScrollTo(Carousel.Position + 1);
}
}
// Set previous item in carousel view
private void ShowPrevious(object sender, System.EventArgs e)
{
if (Carousel.Position != 0)
{
Carousel.ScrollTo(Carousel.Position - 1);
}
}
private void Subscribe()
{
MessagingCenter.Subscribe <ProductListView, ProductItemDTO>(
this, GlobalEventSender.PAYMENT_DELETE_PRODUCT, async(sender, arg) =>
{
bool choose = await DisplayAlert(
"Eliminar producto",
"¿Continuar?",
"Continuar",
"Cancelar");
if (choose)
{
modelContext.DeleteProduct(arg);
}
});
MessagingCenter.Subscribe <ProductListView, object>(
this, GlobalEventSender.PAYMENT_ADD_REDEEM_CODE, async(sender, arg) =>
{
await modelContext.AddRedeemCode();
});
MessagingCenter.Subscribe <ProductListView, object>(
this, GlobalEventSender.PAYMENT_CONTINUE_TO_PAY, (sender, arg) =>
{
Carousel.ScrollTo(1);
});
MessagingCenter.Subscribe <UserInfoView, object>(
this, GlobalEventSender.PAYMENT_COMFIRM_PAY, async(sender, arg) =>
{
if ((bool)arg)
{
await modelContext.Submit();
return;
}
await DisplayAlert(
"Alerta",
"Verifique los datos proporcionados",
"Entendido");
});
MessagingCenter.Subscribe <ProductListView, int>(this, GlobalEventSender.PAYMENT_EDIT_PRODUCT_QUANTITY, (sender, arg) =>
{
modelContext.EditQuantity((int)arg);
});
}
protected override async void OnAppearing()
{
//!((string)Carousel.CurrentItem).Equals(Path)
Console.WriteLine("Current Path: " + ((BindingContext as ViewModel_DiaryEntry).Entry.PhotoLinks[Carousel.Position]));
Console.WriteLine("Clicked Path" + Path);
if (InEditState == true)
{
ToolbarDelete.IconImageSource = "baseline_delete_24.png";
}
else
{
ToolbarItems.Remove(ToolbarDelete);
}
await Task.Delay(50);//Just realised this is a thing that we need to use in order to scroll automatically more than one item on a carousel
Carousel.ScrollTo(Path);
base.OnAppearing();
}
private async void EntryAdded(object sender, EventArgs e)
{
//This function scrolls the carousel all the way to the end. When a new item is added to the end of the Itemsource.
//This automatically triggers the Carousel_PositionChanged function as it goes towards the end, saving all subsequent entries.
//In Xamarin Forms 5.0, there is an IOS bug where the ScrollTo function would always put the current item to the first entry,
//The fix for this was to set the animate variable to false, so that on IOS it will still take the user to the last entry
await Task.Delay(500); //Necessary to get the last page displayed as an Editing diary page
Console.WriteLine("[EntryAdded] Number of Pages " + _viewModel.DiaryEntries.Count);
if (Device.RuntimePlatform == Device.iOS)
{
int num = _viewModel.DiaryEntries.Count - 1;
Console.WriteLine("Scrolling to position " + num);
Carousel.ScrollTo(num, animate: false);
}
else if (Device.RuntimePlatform == Device.Android)
{
Carousel.ScrollTo(index: _viewModel.DiaryEntries.Count - 1);
}
}
