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Version 4.13.1 Cache "no tile" responses.

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ClemensF 2019-07-22 19:47:57 +02:00
parent 576dd8e8e7
commit 219171381f
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63
MapImages/Shared/ZoomLevelToOpacityConverter.cs
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// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
// © 2019 Clemens Fischer
// Licensed under the Microsoft Public License (Ms-PL)
using System;
using System.Globalization;
#if WINDOWS_UWP
using Windows.UI.Xaml;
using Windows.UI.Xaml.Data;
#else
using System.Windows;
using System.Windows.Data;
#endif
namespace MapControl.Images
{
public class ZoomLevelToOpacityConverter : IValueConverter
{
public double MinZoomLevel { get; set; } = 0d;
public double MaxZoomLevel { get; set; } = 22d;
public double FadeZoomRange { get; set; } = 1d;
public double MaxOpacity { get; set; } = 1d;
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (!(value is double))
{
return DependencyProperty.UnsetValue;
}
var zoomLevel = (double)value;
var opacity = 0d;
if (zoomLevel > MinZoomLevel && zoomLevel < MaxZoomLevel)
{
opacity = MaxOpacity;
if (FadeZoomRange > 0d)
{
opacity = Math.Min(opacity, (zoomLevel - MinZoomLevel) / FadeZoomRange);
opacity = Math.Min(opacity, (MaxZoomLevel - zoomLevel) / FadeZoomRange);
}
}
return opacity;
}
public object Convert(object value, Type targetType, object parameter, string language)
{
return Convert(value, targetType, parameter, CultureInfo.InvariantCulture);
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotSupportedException();
}
public object ConvertBack(object value, Type targetType, object parameter, string language)
{
throw new NotSupportedException();
}
}
}