//See: http://blog.ningzhang.org/2008/11/dependencyproperty-validation-coercion.html
/// <summary>
/// This ensures the Busy will not be false, untill the last Busy call is dealt with
/// It will keep the value true untill the counter is 0
/// </summary>
/// <param name="d"></param>
/// <param name="value"></param>
/// <returns></returns>
private static object CoerceBusyProperty(DependencyObject d, object value)
{
BusyIndicatorControl busyControl = (BusyIndicatorControl)d;
bool val = (bool)value;
if (val == false && busyControl.BusyMode == BusyMode.BusyIfTrue)
{
// if the user set it to false, then HideBusy will decriment the counter, and determine if this is the last one
// if it is the last one we will get back a false, if it isn't we will leave the busy value at true
return(busyControl.HideBusy());
}
else if (val == true && busyControl.BusyMode == BusyMode.BusyIfTrue)
{
busyControl.ShowBusy();
return(true);
}
else if (val == false && busyControl.BusyMode == BusyMode.BusyIfFalse)
{
busyControl.ShowBusy();
return(true);
}
else if (val == true && busyControl.BusyMode == BusyMode.BusyIfFalse)
{
return(busyControl.HideBusy());
}
throw new NotImplementedException("Should never reach this point. All conditions should be covered");
}
private static void BusyPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
BusyIndicatorControl busyControl = (BusyIndicatorControl)d;
}