/// <summary>
/// Provede vložení hodnoty, a vyvolání eventu <see cref="ValueChanging"/>.
/// Pokud ale na začátku je <see cref="_ValueIsChanging"/> == true, pak nedělá nic; to je ochranou proti zacyklení.
/// </summary>
/// <param name="sender"></param>
/// <param name="value"></param>
/// <param name="eventSource"></param>
protected void _SetValue(object sender, T value, EventSourceType eventSource)
{
if (this._ValueIsChanging)
{
return;
}
try
{
this._ValueIsChanging = true;
T oldValue = this._Value;
T newValue = this.AlignValueToLimit(value);
if (!this.IsEqual(oldValue, newValue))
{
this._Value = newValue;
GPropertyChangeArgs <T> args = new GPropertyChangeArgs <T>(oldValue, newValue, eventSource);
this.CallValueChanging(sender, args);
this._Value = args.CorrectValue;
}
}
finally
{
this._ValueIsChanging = false;
}
}
/// <summary>
/// Metoda vyvolá háček <see cref="OnValueChanging(object, GPropertyChangeArgs{T})"/> a event <see cref="ValueChanging"/>.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
protected void CallValueChanging(object sender, GPropertyChangeArgs <T> args)
{
this.OnValueChanging(sender, args);
if (this.ValueChanging != null)
{
this.ValueChanging(sender, args);
}
}
/// <summary>
/// Protected háček při změně hodnoty
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
protected virtual void OnValueChanging(object sender, GPropertyChangeArgs <T> args)
{
}
