public static async void SetBackgroundSource(this Grid grid, AdaptiveBackgroundImage adaptiveBackgroundImage, AdaptiveRenderContext context)
{
// Try to resolve the image URI
Uri finalUri = context.Config.ResolveFinalAbsoluteUri(adaptiveBackgroundImage?.Url);
if (finalUri == null)
{
return;
}
BitmapImage bi = await context.ResolveImageSource(finalUri);
if (bi != null)
{
// bi.Pixel{Width, Height}: dimensions of image
// grid.Actual{Width, Height}: dimensions of grid containing background image
switch (adaptiveBackgroundImage.Mode)
{
case AdaptiveBackgroundImageMode.Repeat:
grid.Background = new ImageBrush(bi)
{
TileMode = TileMode.Tile,
Viewport = new Rect(0, 0, bi.PixelWidth, bi.PixelHeight),
ViewportUnits = BrushMappingMode.Absolute
};
break;
case AdaptiveBackgroundImageMode.RepeatHorizontally:
grid.Background = new ImageBrush(bi)
{
TileMode = TileMode.FlipY,
Stretch = Stretch.Uniform,
AlignmentY = (AlignmentY)adaptiveBackgroundImage.VerticalAlignment,
Viewport = new Rect(0, 0, bi.PixelWidth, grid.ActualHeight + 1),
ViewportUnits = BrushMappingMode.Absolute
};
break;
case AdaptiveBackgroundImageMode.RepeatVertically:
grid.Background = new ImageBrush(bi)
{
TileMode = TileMode.FlipX,
Stretch = Stretch.Uniform,
AlignmentX = (AlignmentX)adaptiveBackgroundImage.HorizontalAlignment,
Viewport = new Rect(0, 0, grid.ActualWidth + 1, bi.PixelWidth),
ViewportUnits = BrushMappingMode.Absolute
};
break;
case AdaptiveBackgroundImageMode.Stretch:
default:
grid.Background = new ImageBrush(bi)
{
Stretch = Stretch.UniformToFill,
AlignmentY = AlignmentY.Top
};
break;
}
}
}
public static void SetSource(this Image image, Uri url, AdaptiveRenderContext context)
{
if (url == null)
{
return;
}
image.Source = context.ResolveImageSource(url);
}
public static void SetBackgroundSource(this Grid grid, Uri url, AdaptiveRenderContext context)
{
if (url == null)
{
return;
}
grid.Background = new ImageBrush(context.ResolveImageSource(url))
{
Stretch = Stretch.UniformToFill,
AlignmentX = AlignmentX.Left,
AlignmentY = AlignmentY.Top
};
}
public static async void SetSource(this Image image, Uri url, AdaptiveRenderContext context)
{
if (url == null)
{
return;
}
image.Source = await context.ResolveImageSource(url);
var binding = new Binding
{
RelativeSource = RelativeSource.Self,
Path = new PropertyPath("Parent.ActualWidth"),
Mode = BindingMode.OneWay,
Converter = new StretchConverter(),
ConverterParameter = image
};
image.SetBinding(Image.StretchProperty, binding);
}
public static async void SetBackgroundSource(this Grid grid, Uri uri, AdaptiveRenderContext context)
{
// Try to resolve the image URI
Uri finalUri = context.Config.ResolveFinalAbsoluteUri(uri);
if (finalUri == null)
{
return;
}
BitmapImage bi = await context.ResolveImageSource(finalUri);
if (bi != null)
{
grid.Background = new ImageBrush(bi)
{
Stretch = Stretch.UniformToFill,
AlignmentX = AlignmentX.Left,
AlignmentY = AlignmentY.Top
};
}
}
/** Helper function to call async function from context */
private static async void SetImageSource(this Image image, string urlString, AdaptiveRenderContext context)
{
image.Source = await context.ResolveImageSource(context.Config.ResolveFinalAbsoluteUri(urlString));
}
