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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Xamarin.Forms.Controls
{
public class DisposeGallery : ContentPage
{
public DisposeGallery ()
{
var disposePage = new DisposePage ();
var pushButton = new Button {Text = "Push disposable page"};
var pushModalButton = new Button {Text = "PushModal disposable page"};
pushButton.Clicked += (sender, args) => {
disposePage.PopAction = () => Navigation.PopAsync ();
Navigation.PushAsync (disposePage);
};
pushModalButton.Clicked += (sender, args) => {
disposePage.PopAction = () => Navigation.PopModalAsync ();
Navigation.PushModalAsync (disposePage);
};
var appearingLabel = new Label {Text = "Appearing not sent"};
var disappearingLabel = new Label {Text = "Disappearing not sent"};
var disposedPageLabel = new Label {Text = "Page renderer not yet disposed"};
var disposedLabelsLabel = new Label {Text = "Number of disposed labels: 0"};
disposePage.Appearing += (sender, args) => appearingLabel.Text = "Appearing sent";
disposePage.Disappearing += (sender, args) => disappearingLabel.Text = "Disappearing sent";
disposePage.RendererDisposed += (sender, args) => {
disposedPageLabel.Text = "Page renderer disposed";
// give some time for this to propogate
Device.StartTimer (TimeSpan.FromSeconds (1), () => {
disposedLabelsLabel.Text = "Number of disposed labels: " + disposePage.DisposedLabelCount;
return false;
});
};
Content = new StackLayout {
Padding = new Thickness (20),
Children = {
pushButton,
pushModalButton,
appearingLabel,
disappearingLabel,
disposedLabelsLabel,
disposedPageLabel
}
};
}
}
}
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