public static bool IsNavigable <T>(this ObjectBase obj, Expression <Func <T> > propertyExpression)
{
string propertyName = PropertySupport.ExtractPropertyName(propertyExpression);
PropertyInfo propertyInfo = obj.GetType().GetProperty(propertyName);
return(propertyInfo.IsNavigable());
}
public override string this[string propertyName]
{
get
{
var baseResult = base[propertyName];
if (baseResult != null)
{
return(baseResult);
}
if (propertyName == PropertySupport.ExtractPropertyName(() => PlotSquare) && !IsValidAndPositiveDecimal(PlotSquare))
{
return("Площадь участка введена некорректно");
}
if (propertyName == PropertySupport.ExtractPropertyName(() => HouseSquare) && !IsValidAndPositiveDecimal(HouseSquare))
{
return("Площадь дома введена некорректно");
}
if (propertyName == PropertySupport.ExtractPropertyName(() => TotalFloor) && !IsValidAndPositiveInt(TotalFloor))
{
return("Количество этажей введено некорректно");
}
return(null);
}
}
/// <summary>
/// Sets value to the Model object's property
/// </summary>
/// <typeparam name="TObject"></typeparam>
/// <typeparam name="TProperty"></typeparam>
/// <param name="storageObject"></param>
/// <param name="storageObjectPropertyExpression"></param>
/// <param name="value"></param>
/// <param name="propertyName"></param>
/// <param name="userInput"></param>
/// <returns></returns>
protected bool SetProperty <TObject, TProperty>(TObject storageObject,
Expression <Func <dynamic> > storageObjectPropertyExpression, TProperty value,
[CallerMemberName] string propertyName = null, bool userInput = false)
{
if (userInput && !_userInput.Contains(propertyName))
{
_userInput.Add(propertyName);
}
var storagePropertyName = PropertySupport.ExtractPropertyName(storageObjectPropertyExpression);
dynamic val = PropertySupport.GetPropertyValue <TObject, TProperty>(storageObject, storagePropertyName);
if ((val as object)?.GetType().IsValueType ?? false && val != null && value != null)
{
if (val.Equals(value))
{
return(false);
}
}
else if (val == value)
{
return(false);
}
PropertySupport.SetPropertyValue(storageObject, storagePropertyName, value);
{
Invalidate(propertyName);
}
return(true);
}
/// <summary>
/// Call to add specific validator to a model property
/// </summary>
protected PropertyValidationRule <TBindingModel> AddValidationFor <T>(Expression <Func <T> > propertyExpression, ValidationAttribute validator = null)
{
string propertyName = PropertySupport.ExtractPropertyName(propertyExpression);
PropertyValidationRule <TBindingModel> result = AddValidationFor <T>(propertyName, validator);
return(result);
}
protected virtual void OnPropertyChanged <T>(Expression <Func <T> > propertyExpression)
{
var propertyName = PropertySupport.ExtractPropertyName(propertyExpression);
OnPropertyChanged(propertyName);
}
/// <summary>
/// 默认值为 null
/// </summary>
/// <typeparam name="X"></typeparam>
/// <param name="propertyExpresssion"></param>
/// <returns></returns>
public object GetZobject <X>(Expression <Func <X> > propertyExpresssion)
{
var propertyName = PropertySupport.ExtractPropertyName(propertyExpresssion);
var gt = GetZ(propertyName);
return(gt);
}
/// <summary>
/// 默认值为 ObservableCollection<X>
/// </summary>
/// <typeparam name="X"></typeparam>
/// <param name="propertyExpresssion"></param>
/// <returns></returns>
public ObservableCollection <X> GetZcollection <X>(Expression <Func <ObservableCollection <X> > > propertyExpresssion)
where X : ObservableObject
{
var propertyName = PropertySupport.ExtractPropertyName(propertyExpresssion);
var gt = GetZ(propertyName);
if (gt == null)
{
SetZ(propertyName, new ObservableCollection <X>());
}
gt = GetZ(propertyName);
if (gt != null)
{
try
{
return(gt as ObservableCollection <X>);
}
catch (Exception ex)
{
}
}
return(null);
}
private void OnSessionChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == PropertySupport.ExtractPropertyName(() => Session.CurrentFigureDescriptor))
{
var selectedVM = Sources
.Select(s => { s.IsSelected = false; return(s); })
.SelectMany(s => s.Figures)
.Select(f => { f.IsSelected = false; return(f); })
.SingleOrDefault(vm => vm.Model == Session.CurrentFigureDescriptor);
if (selectedVM != null)
{
selectedVM.IsSelected = true;
}
}
else if (e.PropertyName == PropertySupport.ExtractPropertyName(() => Session.CurrentSource))
{
var selectedVM = Sources
.Select(s => { s.IsSelected = false; return(s); })
.SingleOrDefault(vm => vm.Model == Session.CurrentSource);
if (selectedVM != null)
{
selectedVM.IsSelected = true;
}
}
}
/// <summary>
/// Create a series from an enumerable with a projection function.
/// </summary>
/// <typeparam name="TSource">The type of the source data.</typeparam>
/// <typeparam name="TResult">The type of the series.</typeparam>
/// <param name="source">An enumerable of data from which the series should be built.</param>
/// <param name="selectorExpression">A projection function.</param>
/// <param name="isNullable">Optionally specify nullability for object types.</param>
/// <returns>A series.</returns>
public static ISeries CreateSeries <TSource, TResult>(this IEnumerable <TSource> source, Expression <Func <TSource, TResult> > selectorExpression, bool?isNullable = null)
{
var propertyName = PropertySupport.ExtractPropertyName(selectorExpression);
var selector = selectorExpression.Compile();
return(CreateSeries(source, typeof(TResult), propertyName, x => selector((TSource)x), isNullable));
}
public static void RemoveListener <TProperty>(
this INotifyPropertyChanged source,
IWeakEventListener listener,
Expression <Func <TProperty> > expression)
{
PropertyChangedEventManager.RemoveListener(source, listener, PropertySupport.ExtractPropertyName(expression));
}
protected void RegisterParameter(Expression <Func <INotifyPropertyChanged> > parameterExpression)
{
var parameterName = PropertySupport.ExtractPropertyName(parameterExpression);
var parameterObject = parameterExpression.Compile()();
parameterObject.PropertyChanged += (sender, args) => RaisePropertyChanged(parameterName);
}
public void Export <T>(Expression <Func <T> > propertyExpression, string key = null)
{
key = key ?? PropertySupport.ExtractPropertyName(propertyExpression);
if (_exportPropertyGetterDictionary.ContainsKey(key))
{
throw new ArgumentException(string.Format(Resources.DataContext_ExportHasBeenExported_Exception, propertyExpression), nameof(propertyExpression));
}
var getter = propertyExpression.Compile();
_exportPropertyGetterDictionary[key] = getter;
PropertyObserver.Observes(propertyExpression, () =>
{
if (!_importPropertySetterDictionary.TryGetValue(key, out var setterDelegates))
{
return;
}
foreach (var setterDelegate in setterDelegates)
{
var setter = (Action <T>)setterDelegate;
setter(getter());
}
});
}
private void canvasBmp_MouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
Point curPos = e.GetPosition(imgCab);
string selPropName;
OnOffGauge g = GetSelectedGauge(out selPropName);
if (g != null && Math.Abs(curPos.X - lastDown.X) > MIN_MOUSE_MOVE_DRAG / scale && Math.Abs(curPos.Y - lastDown.Y) > MIN_MOUSE_MOVE_DRAG / scale)
{
int newX = (int)(Math.Min(curPos.X, lastDown.X));
int newY = (int)(Math.Min(curPos.Y, lastDown.Y));
int newWidth = (int)(Math.Abs(curPos.X - lastDown.X));
int newHeight = (int)(Math.Abs(curPos.Y - lastDown.Y));
if (selPropName == PropertySupport.ExtractPropertyName(() => g.OnPosition))
{
g.OnPosition.X = newX;
g.OnPosition.Y = newY;
}
else if (selPropName == PropertySupport.ExtractPropertyName(() => g.OffPosition))
{
g.OffPosition.X = newX;
g.OffPosition.Y = newY;
}
else
{
g.Position.X = newX;
g.Position.Y = newY;
}
g.Dimension.Width = newWidth;
g.Dimension.Height = newHeight;
RefreshDisplayedRects();
}
}
}
private void canvasBmp_MouseDown(object sender, MouseButtonEventArgs e)
{
lastDown = e.GetPosition(imgCab);
string selPropName;
OnOffGauge g = GetSelectedGauge(out selPropName);
if (g != null)
{
if (selPropName == null || selPropName == PropertySupport.ExtractPropertyName(() => g.Position))
{
g.Position.X = (int)(lastDown.X);
g.Position.Y = (int)(lastDown.Y);
}
else if (selPropName == PropertySupport.ExtractPropertyName(() => g.OnPosition))
{
g.OnPosition.X = (int)(lastDown.X);
g.OnPosition.Y = (int)(lastDown.Y);
}
else if (selPropName == PropertySupport.ExtractPropertyName(() => g.OffPosition))
{
g.OffPosition.X = (int)(lastDown.X);
g.OffPosition.Y = (int)(lastDown.Y);
}
RefreshDisplayedRects();
}
}
public static DataFrame PivotToDataFrame <TSource, TRow, TColumn, TValue>(
this ICollection <TSource> source,
Expression <Func <TSource, TRow> > rowSelector,
Func <TSource, TColumn> columnSelector,
Func <IEnumerable <TSource>, TValue> valueSelector)
{
var rowName = PropertySupport.ExtractPropertyName(rowSelector);
var columns = source.Select(columnSelector).Distinct().ToList();
var df = new DataFrame(new IVector[] { new Vector <TRow>(rowName) }.Concat(columns.Select(x => x.ToString()).Select(x => new Vector <TValue>(x))));
var rows = source.GroupBy(rowSelector.Compile())
.Select(rowGroup => new
{
Key = rowGroup.Key,
Values = columns.GroupJoin(rowGroup, c => c, columnSelector, (c, values) => valueSelector(values))
});
foreach (var row in rows)
{
var items = new [] { (object)row.Key }.Concat(row.Values.Cast <object>()).ToArray();
df.Add(items);
}
return(df);
}
protected bool SetProperty<T>([CanBeNull] ref T backingField, [CanBeNull] T value, [NotNull] Expression<Func<T>> propertyExpression, [NotNull] Action<T, T> changeCallback)
{
Contract.Requires(propertyExpression != null);
Contract.Requires(changeCallback != null);
return SetProperty(ref backingField, value, PropertySupport.ExtractPropertyName(propertyExpression), changeCallback);
}
private string GetErrorsFor <T>(Expression <Func <T> > propertyExpression)
{
var errors = ErrorsContainer.GetErrors(PropertySupport.ExtractPropertyName(propertyExpression));
var errStrs = errors.Where(r => !r.IsValid).Select(r => r.ErrorContent.ToString());
var errStr = string.Join(Environment.NewLine, errStrs);
return(errStr);
}
[Ignore] // cannot build the expression
public void WhenExpressionRepresentsAPropertyWithNoGetMethod_ThenAnExceptionIsThrown()
{
ExceptionAssert.Throws <ArgumentException>(() =>
PropertySupport.ExtractPropertyName(
Expression.Lambda <Func <int> >(
Expression.MakeMemberAccess(
null,
typeof(PropertySupportFixture).GetProperty("SetOnlyStaticProperty")))));
}
private void OnExecuteMicrophoneSelectedCommand(object param)
{
if (param is string)
{
this.CurrentMicrophone = param as string;
}
this.OnPropertyChanged(PropertySupport.ExtractPropertyName(() => this.IsCaptureDevicesSelected));
}
protected void OnPropertyChanged <T>(Expression <Func <T> > propertyExpression)
{
var propertyName = PropertySupport.ExtractPropertyName(propertyExpression);
if (propertyName != null)
{
OnPropertyChanged(propertyName);
}
}
public static Property <PropertyType> GetProperty <T, PropertyType>(this T owner, Expression <Func <T, PropertyType> > key, IPropertyBindingStrategy bindingStrategy = null, Func <PropertyType> getter = null, Action <T, PropertyType> setter = null)
{
Action <object, PropertyType> mySetter = null;
if (setter != null)
{
mySetter = (o, v) => setter((T)o, v);
}
return(new Property <PropertyType>(owner, PropertySupport.ExtractPropertyName(key), bindingStrategy, getter, mySetter));
}
protected void ClearPropertyToValidate <T>(Expression <Func <T> > propertyExpression)
{
string propertyName = PropertySupport.ExtractPropertyName(propertyExpression);
PropertyInfo property = ThisType.GetProperty(propertyName);
if (property != null)
{
m_PropertiesToValidate.Remove(property);
}
}
/// <summary>
/// 默认值为 Empty
/// </summary>
/// <typeparam name="X"></typeparam>
/// <param name="propertyExpresssion"></param>
/// <returns></returns>
public string GetZstring <X>(Expression <Func <X> > propertyExpresssion)
{
var propertyName = PropertySupport.ExtractPropertyName(propertyExpresssion);
var gt = GetZ(propertyName);
if (gt == null)
{
return(string.Empty);
}
return(gt.ToString());
}
public static Property <TPropertyType> GetProperty <T, TPropertyType>(
this T owner,
Expression <Func <T, TPropertyType> > key,
IPropertyBindingStrategy bindingStrategy = null,
Func <T, TPropertyType> getter = null,
Action <T, TPropertyType> setter = null)
{
var propertyName = PropertySupport.ExtractPropertyName(key);
return(owner.GetProperty(propertyName, bindingStrategy, getter, setter));
}
protected void WhenStateUpdated <TProperty> (Expression <Func <TProperty> > property, Action action)
{
var name = PropertySupport.ExtractPropertyName(property);
if (!_stateHandlers.ContainsKey(name))
{
_stateHandlers[name] = new List <Action> ();
}
_stateHandlers[name].Add(action);
}
public void TrackProperties(params Expression <Func <object> >[] expressions)
{
foreach (var expression in expressions)
{
var propertyName = PropertySupport.ExtractPropertyName(expression);
var propertyValue = PropertySupport.GetPropertyValue <object, dynamic>(this, propertyName);
_initialValues[propertyName] = propertyValue;
OnValidate(propertyName);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="T:TomsToolbox.ObservableCollections.ObservableExtensions.ObservableSelectImpl`2" /> class.
/// </summary>
/// <param name="sourceCollection">The source collection to wrap.</param>
/// <param name="itemGeneratorExpression">The item generator to generate the wrapper for each item.</param>
public ObservableSelectImpl([NotNull, ItemCanBeNull] IList <TSource> sourceCollection, [NotNull] Expression <Func <TSource, TTarget> > itemGeneratorExpression)
: base(sourceCollection, itemGeneratorExpression.Compile())
{
_propertyName = PropertySupport.TryExtractPropertyName(itemGeneratorExpression);
_sourceReference = new WeakReference <IList <TSource> >(sourceCollection);
if (_propertyName == null)
{
return;
}
sourceCollection.ForEach(item => AttachItemEvents(item as INotifyPropertyChanged));
}
/// <summary>
/// Initializes a new instance of the <see cref="T:TomsToolbox.ObservableCollections.ObservableExtensions.ObservableSelectImpl`2" /> class.
/// </summary>
/// <param name="sourceCollection">The source collection to wrap.</param>
/// <param name="itemGeneratorExpression">The item generator to generate the wrapper for each item.</param>
public ObservableSelectImpl([NotNull, ItemCanBeNull] IList <TSource> sourceCollection, [NotNull] Expression <Func <TSource, TTarget> > itemGeneratorExpression)
: base(sourceCollection, itemGeneratorExpression.Compile())
{
_propertyName = PropertySupport.TryExtractPropertyName(itemGeneratorExpression);
_sourceReference = new TomsToolbox.Core.WeakReference <IList <TSource> >(sourceCollection);
if (_propertyName == null)
{
return;
}
_propertyChangeEventListeners = GeneratePropertyChangeEventListeners(sourceCollection);
}
public override string this[string columnName]
{
get
{
if (columnName == PropertySupport.ExtractPropertyName(() => Name))
{
if (String.IsNullOrWhiteSpace(Name))
{
return(String.Format("Значение элемента справочника \"{0}\" не может быть пустым.", _DictionaryService.DictionaryName));
}
}
return(null);
}
}
public bool CheckIsPropertyChanged(string propertyName)
{
var initialValue = _initialValues[propertyName];
var actualValue = PropertySupport.GetPropertyValue <object, dynamic>(this, propertyName);
if (actualValue is IStorableBladeModel storableBladeModel)
{
return(storableBladeModel.IsChanged);
}
else
{
return(!PropertySupport.CompareHelper.AreEquals(actualValue, initialValue));
}
}
