/// <summary>
/// Sets the current OS theme using the given HighContrastTheme parameter
/// </summary>
/// <param name="theme"></param>
public static void SetCurrent(HighContrastTheme theme)
{
var themes = new List <Theme>(Theme.GetAccessibleThemes());
var hcTheme = themes.Find((Theme t) =>
{
return(string.Equals(t.Name, theme.ToString(), StringComparison.InvariantCultureIgnoreCase));
});
if (hcTheme == null)
{
throw new NotSupportedException($"Theme {theme.ToString()} is not supported");
}
Theme.SetCurrent(hcTheme);
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
string[] strArray = parameter.ToString().Split(',');
HighContrastTheme theme = HighContrastHelper.GetTheme(value);
if (theme != HighContrastTheme.None)
{
if (strArray[0] == "HighContrastBlackAndWhiteEffect")
{
HighContrastBlackAndWhiteEffect blackAndWhiteEffect = new HighContrastBlackAndWhiteEffect();
blackAndWhiteEffect.Invert = theme == HighContrastTheme.White ? 1.0 : 0.0;
if (strArray.Length == 2)
{
blackAndWhiteEffect.Amount = double.Parse(strArray[1], (IFormatProvider)CultureInfo.InvariantCulture);
}
return((object)blackAndWhiteEffect);
}
if (strArray[0] == "HighContrastInvertColorsEffect")
{
HighContrastInvertColorsEffect invertColorsEffect = new HighContrastInvertColorsEffect();
invertColorsEffect.Invert = theme == HighContrastTheme.White ? 1.0 : 0.0;
if (strArray.Length == 3)
{
invertColorsEffect.Brightness = double.Parse(strArray[1], (IFormatProvider)CultureInfo.InvariantCulture);
invertColorsEffect.Contrast = double.Parse(strArray[2], (IFormatProvider)CultureInfo.InvariantCulture);
}
return((object)invertColorsEffect);
}
if (strArray[0] == "MonochromeEffect")
{
return (object)new MonochromeEffect()
{
Invert = (theme == HighContrastTheme.White ? 1.0 : 0.0)
}
}
;
}
return((object)null);
}
/// <summary>
///
/// </summary>
/// <param name="theme"></param>
public ThemeSwitcher(HighContrastTheme theme) : this()
{
Theme.SetCurrent(theme);
}
/// <summary>
/// Sets the current OS theme using the given HighContrastTheme parameter.
/// </summary>
/// <param name="theme"></param>
/// <returns></returns>
public static ThemeSwitcher SetTheme(HighContrastTheme theme)
{
return(new ThemeSwitcher(theme));
}
public HighContrastProvider()
{
this.Theme = HighContrastHelper.CurrentTheme;
}
