/// <summary>
/// Determine if the property corresponding to 'bit' is dirty. If dirty, this normally indicates
/// that a corresponding register needs to be updated in Apply().
///
/// If a derived class needs to keep track of more than 32 properties, override
/// PropertyChangePending(object) and delegate the operation to a method similar
/// to this one that tracks more bits...
/// </summary>
/// <param name="bit">the bit (or bits) to clear</param>
protected bool PropertyChangePending(CorePropertyChanged bit)
{
// One possible way to override this method to support more than 32 properties
// (448 as shown) is:
// int index = (int)(bit & 0x000f);
// return ( mBigPropertyChangePending[index] & bit & ~0x000f ) != 0;
return((mCorePropertyChangePending & bit) != 0);
}
protected virtual bool SetIfPropertyChanged <T>(ref T memberVar, T newValue, CorePropertyChanged propertyId)
{
if (EqualityComparer <T> .Default.Equals(memberVar, newValue))
{
// no changes
return(false);
}
memberVar = newValue;
SetPropertyChangePending(propertyId);
// anytime a property changes, we need to re-validate.
NeedValidate = true;
return(true);
}
/// <summary>
/// Clear a bit indicating the corresponding property is clean. This is normally called
/// from Apply after a corresponding register has been update.
///
/// If a derived class needs to keep track of more than 32 properties, override
/// SetPropertyChangePending(object) and delegate the operation to a method similar
/// to this one that tracks more bits...
/// </summary>
/// <param name="bit">the bit (or bits) to set</param>
protected void ClearPropertyChangePending(CorePropertyChanged bit)
{
mCorePropertyChangePending &= ~bit;
}
/// <summary>
/// Set a bit indicating the corresponding property is dirty. This normally indicates
/// that a corresponding register needs to be updated in Apply().
///
/// If a derived class needs to keep track of more than 32 properties, override
/// SetPropertyChangePending(object) and delegate the operation to a method similar
/// to this one that tracks more bits...
/// </summary>
/// <param name="bit">the bit (or bits) to set</param>
protected void SetPropertyChangePending(CorePropertyChanged bit)
{
mCorePropertyChangePending |= bit;
}
