void LoadIconImage(IImageSourceHandler handler, ImageSource source)
{
_iconTokenSource = new CancellationTokenSource();
var token = _iconTokenSource.Token;
UIImage image = null;
var scale = (float)UIScreen.MainScreen.Scale;
Task.Run(async() =>
{
if (source is FontImageSource)
{
DispatchQueue.MainQueue.DispatchSync(async() => {
image = await handler.LoadImageAsync(source, token, scale: scale);
});
}
else
{
image = await handler.LoadImageAsync(source, token, scale: scale);
}
token.ThrowIfCancellationRequested();
}, token).ContinueWith(t =>
{
if (t.IsCompleted)
{
ImageCacheController.Instance.SetObjectforKey(image, FromObject(CellBase.IconSource.GetHashCode()));
BeginInvokeOnMainThread(() =>
{
IconView.Image = image;
SetNeedsLayout();
});
}
});
}
void LoadIconImage(IImageSourceHandler handler, ImageSource source)
{
_iconTokenSource = new CancellationTokenSource();
var token = _iconTokenSource.Token;
Bitmap image = null;
var scale = (float)_Context.Resources.DisplayMetrics.Density;
Task.Run(async() =>
{
image = await handler.LoadImageAsync(source, _Context, token);
token.ThrowIfCancellationRequested();
image = CreateRoundImage(image);
}, token).ContinueWith(t =>
{
if (t.IsCompleted)
{
//entrust disposal of returned old image to Android OS.
ImageCacheController.Instance.Put(CellBase.IconSource.GetHashCode(), image);
Device.BeginInvokeOnMainThread(() =>
{
Task.Delay(50); // in case repeating the same source, sometimes the icon not be shown. by inserting delay it be shown.
IconView.SetImageBitmap(image);
Invalidate();
});
}
});
}
private async void UpdateImage()
{
IImageSourceHandler imageSourceHandler = Registrar.Registered.GetHandler <IImageSourceHandler> (Element.Image.GetType());
if (Element.Image != null && imageSourceHandler != null)
{
NSImage image2;
try
{
image2 = await imageSourceHandler.LoadImageAsync(Element.Image, new CancellationToken());
}
catch (OperationCanceledException ex)
{
image2 = null;
}
if (Control != null && image2 != null)
{
Control.Image = image2;
//Control.ImageView.ContentMode = UIViewContentMode.ScaleAspectFit;
//this.Control.ImageEdgeInsets = new UIEdgeInsets ((nfloat)0, (nfloat)0, (nfloat)0, (nfloat)10);
//this.Control.TitleEdgeInsets = new UIEdgeInsets ((nfloat)0, (nfloat)10, (nfloat)0, (nfloat)0);
}
}
else
{
this.Control.Image = null;
//this.Control.ImageEdgeInsets = new UIEdgeInsets ((nfloat)0, (nfloat)0, (nfloat)0, (nfloat)0);
//this.Control.TitleEdgeInsets = new UIEdgeInsets ((nfloat)0, (nfloat)0, (nfloat)0, (nfloat)0);
}
((IVisualElementController)Element).NativeSizeChanged();
}
async void SetImage(CustomSwitchCell cell, CellTableViewCell target)
{
var source = cell.ImageSource;
target.ImageView.Image = null;
IImageSourceHandler handler = GetHandler(source);
if (source != null && handler != null)
{
UIImage uiimage;
try
{
uiimage = await handler.LoadImageAsync(source).ConfigureAwait(false);
}
catch (TaskCanceledException)
{
uiimage = null;
}
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
target.ImageView.Image = uiimage;
target.SetNeedsLayout();
});
}
else
{
target.ImageView.Image = null;
}
}
private async Task <Gdk.Pixbuf> LoadImageAsync(ImageSource imageSource)
{
IImageSourceHandler handler =
Registrar.Registered.GetHandler <IImageSourceHandler>(imageSource.GetType());
var image = await handler.LoadImageAsync(imageSource);
return(image);
}
public async void Share(string subject, string message,
ImageSource imageSource)
{
var intent = new Intent(Intent.ActionSend);
intent.SetType("image/jpeg");
if (imageSource is FileImageSource)
{
handler = new FileImageSourceHandler();
}
else if (imageSource is StreamImageSource)
{
handler = new StreamImagesourceHandler(); // sic
}
else if (imageSource is UriImageSource)
{
handler = new ImageLoaderSourceHandler(); // sic
}
else
{
}
var bitmap = await handler.LoadImageAsync(imageSource, CrossCurrentActivity.Current.Activity);
Java.IO.File path = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDownloads
+ Java.IO.File.Separator + "MyDiagram.jpg");
using (System.IO.FileStream os = new System.IO.FileStream(path.AbsolutePath, System.IO.FileMode.Create))
{
bitmap.Compress(Bitmap.CompressFormat.Jpeg, 100, os);
}
intent.AddFlags(ActivityFlags.GrantReadUriPermission);
intent.AddFlags(ActivityFlags.GrantWriteUriPermission);
intent.PutExtra(Intent.ExtraStream, FileProvider.GetUriForFile(CrossCurrentActivity.Current.Activity, "com.companyname.ecomdemo.fileprovider", path));
CrossCurrentActivity.Current.Activity.StartActivity(Intent.CreateChooser(intent, "Share Image"));
}
private async Task UpdateHamburguerIconAsync()
{
var hamburguerIcon = Page.Master.Icon;
if (hamburguerIcon != null)
{
IImageSourceHandler handler =
Registrar.Registered.GetHandler <IImageSourceHandler>(hamburguerIcon.GetType());
var image = await handler.LoadImageAsync(hamburguerIcon);
Widget.UpdateHamburguerIcon(image);
var navigationPage = Page.Detail as NavigationPage;
if (navigationPage != null)
{
var navigationRenderer = Platform.GetRenderer(navigationPage) as IToolbarTracker;
navigationRenderer?.NativeToolbarTracker.UpdateToolBar();
}
}
}
public static Task <UIImage> ToUIImage(this ImageSource imageSource)
{
IImageSourceHandler handler = imageSource.GetHandler();
return(handler.LoadImageAsync(imageSource));
}