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using Windows.Foundation;
using Windows.Graphics.Display;
using Windows.UI;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media;
namespace Xamarin.Forms.ControlGallery.WindowsUniversal
{
internal class BrokenNativeControl : Panel
{
public BrokenNativeControl ()
{
_textBlock = new TextBlock {
MinHeight = 0,
MaxHeight = double.PositiveInfinity,
MinWidth = 0,
MaxWidth = double.PositiveInfinity,
FontSize = 24,
HorizontalAlignment = HorizontalAlignment.Center
};
Children.Add (_textBlock);
Background =
new LinearGradientBrush (
new GradientStopCollection { new GradientStop { Color = Colors.Green, Offset = 0.5}, new GradientStop { Color = Colors.Blue, Offset = 1} }, 0);
}
public static readonly DependencyProperty TextProperty = DependencyProperty.Register (
"Text", typeof(string), typeof(BrokenNativeControl), new PropertyMetadata (default(string), PropertyChangedCallback));
static void PropertyChangedCallback (DependencyObject dependencyObject,
DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
{
((BrokenNativeControl)dependencyObject)._textBlock.Text = (string)dependencyPropertyChangedEventArgs.NewValue;
}
public string Text
{
get { return (string)GetValue (TextProperty); }
set { SetValue (TextProperty, value); }
}
readonly TextBlock _textBlock;
protected override Windows.Foundation.Size ArrangeOverride(Windows.Foundation.Size finalSize)
{
_textBlock.Arrange(new Rect(0, 0, finalSize.Width, finalSize.Height));
return finalSize;
}
protected override Windows.Foundation.Size MeasureOverride (Windows.Foundation.Size availableSize)
{
_textBlock.Measure (availableSize);
// This deliberately does something wrong so we can demo fixing it
Rect bounds = ApplicationView.GetForCurrentView ().VisibleBounds;
double scaleFactor = DisplayInformation.GetForCurrentView ().RawPixelsPerViewPixel;
var size = new Size (bounds.Width * scaleFactor, bounds.Height * scaleFactor);
return new Windows.Foundation.Size (size.Width, _textBlock.DesiredSize.Height);
}
}
}
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