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using System;
using System.ComponentModel;
using Windows.UI.Xaml;
#if WINDOWS_UWP
namespace Xamarin.Forms.Platform.UWP
#else
namespace Xamarin.Forms.Platform.WinRT
#endif
{
public class ActivityIndicatorRenderer : ViewRenderer<ActivityIndicator, Windows.UI.Xaml.Controls.ProgressBar>
{
#if !WINDOWS_UWP
Windows.UI.Xaml.Media.SolidColorBrush _resourceBrush;
#endif
object _foregroundDefault;
protected override void OnElementChanged(ElementChangedEventArgs<ActivityIndicator> e)
{
base.OnElementChanged(e);
if (e.NewElement != null)
{
if (Control == null)
{
SetNativeControl(new Windows.UI.Xaml.Controls.ProgressBar { IsIndeterminate = true });
Control.Loaded += OnControlLoaded;
}
// UpdateColor() called when loaded to ensure we can cache dynamic default colors
UpdateIsRunning();
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == ActivityIndicator.IsRunningProperty.PropertyName)
UpdateIsRunning();
else if (e.PropertyName == ActivityIndicator.ColorProperty.PropertyName)
UpdateColor();
}
void OnControlLoaded(object sender, RoutedEventArgs routedEventArgs)
{
#if !WINDOWS_UWP
_resourceBrush = (Control.Resources["ProgressBarIndeterminateForegroundThemeBrush"] as Windows.UI.Xaml.Media.SolidColorBrush);
_foregroundDefault = _resourceBrush.Color;
#else
_foregroundDefault = Control.GetForegroundCache();
#endif
UpdateColor();
}
void UpdateColor()
{
Color color = Element.Color;
if (color.IsDefault)
{
#if !WINDOWS_UWP
_resourceBrush.Color = (Windows.UI.Color) _foregroundDefault;
#else
Control.RestoreForegroundCache(_foregroundDefault);
#endif
}
else
{
#if !WINDOWS_UWP
_resourceBrush.Color = color.ToWindowsColor();
#else
Control.Foreground = color.ToBrush();
#endif
}
}
void UpdateIsRunning()
{
Opacity = Element.IsRunning ? 1 : 0;
}
}
}
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