public static bool SetPropertyValue <TProperty>(
IModel model,
ref TProperty property,
TProperty value,
string propertyName)
{
IModelOptions options = model.ModelOptions ?? ModelOptions.Default;
if (options.UseOnlyOnPropertyChanged)
{
property = value;
model.OnPropertyChanged(propertyName);
return(true);
}
if (property == null & value == null)
{
return(true);
}
else if (property != null && property.Equals(value))
{
return(true);
}
TProperty oldValue = property;
property = value;
if (options.UseOnVerification)
{
var args = new MvvmElementPropertyVerifyChangeEventArgs(propertyName);
model.OnVerification(args);
if (!args.IsValid)
{
property = oldValue;
model.OnErrors(args.GetErrors());
return(false);
}
}
if (options.UseVerifyPropertyChange && !model.OnVerifyPropertyChange(propertyName))
{
property = oldValue;
return(false);
}
model.OnPropertyChanged(propertyName);
return(true);
}
public static bool OnVerifyPropertyChange(IModel element, Action <MvvmElementPropertyVerifyChangeEventArgs> onVerifyPropertyChange, string propertyName)
{
var options = element.ModelOptions ?? ModelOptions.Default;
if (!options.UseVerifyPropertyChange)
{
return(false);
}
var args = new MvvmElementPropertyVerifyChangeEventArgs(propertyName);
onVerifyPropertyChange(args);
if (!args.IsValid)
{
element.OnErrors(args.GetErrors());
}
return(args.IsValid);
}
/// <summary>
/// Verification hendler
/// </summary>
/// <param name="e"></param>
public virtual void OnVerification(MvvmElementPropertyVerifyChangeEventArgs e)
{
}