public void Dispose()
{
sourceExpression.Dispose();
if (Target is Visual)
{
((Visual)Target).VisualAncestorChanged -= OnTargetVisualAncestorChanged;
}
if (Target is UIElement)
{
((UIElement)Target).LostFocus -= OnLostFocus;
}
Target = null;
TargetProperty = null;
Status = BindingStatus.Detached;
}
public void Dispose()
{
sourceExpression.Dispose();
if (sourceObserver is IDisposable)
{
((IDisposable)sourceObserver).Dispose();
}
if (UpdateSourceTrigger == UpdateSourceTrigger.LostFocus && isSourceUpdateMode && Target is UIElement)
{
((UIElement)Target).LostFocus -= OnLostFocus;
}
Target = null;
TargetProperty = null;
Status = BindingStatus.Detached;
}
public void ObservableExpressionClrPropertyTest()
{
ObservableNode child1 = new ObservableNode { Value = 1 };
ObservableNode child2 = new ObservableNode { Value = 2 };
ObservableNode root = new ObservableNode { Value = 0 };
int valueChangedCount = 0;
ObservableExpression observableExpression = new ObservableExpression(root, "Child.Value");
observableExpression.ValueChanged += (sender, e) => valueChangedCount++;
Assert.AreEqual(ObservableValue.UnsetValue, observableExpression.Value);
root.Child = child1;
Assert.AreEqual(1, observableExpression.Value);
Assert.AreEqual(1, valueChangedCount);
child1.Value = 2;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
root.Child = child2;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
child1.Value = 3;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
child2.Value = 3;
Assert.AreEqual(3, observableExpression.Value);
Assert.AreEqual(3, valueChangedCount);
Assert.AreEqual(true, observableExpression.TrySetValue(4));
Assert.AreEqual(3, child1.Value);
Assert.AreEqual(4, child2.Value);
Assert.AreEqual(4, valueChangedCount);
root.Child = null;
Assert.AreEqual(ObservableValue.UnsetValue, observableExpression.Value);
Assert.AreEqual(5, valueChangedCount);
observableExpression.Dispose();
root.Child = child1;
Assert.AreEqual(5, valueChangedCount);
}
public void ObservableExpressionIndexerTest()
{
ObservableNode root = new ObservableNode { Children = new ObservableCollection<ObservableNode> { new ObservableNode { Value = 1 } } };
int valueChanged = 0;
ObservableExpression observableExpression = new ObservableExpression(root, "Children[0].Value");
observableExpression.ValueChanged += (sender, e) => valueChanged++;
Assert.AreEqual(1, observableExpression.Value);
Assert.AreEqual(0, valueChanged);
root.Children[0].Value = 2;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(1, valueChanged);
root.Children[0] = new ObservableNode { Value = 3 };
Assert.AreEqual(3, observableExpression.Value);
Assert.AreEqual(2, valueChanged);
root.Children = new ObservableCollection<ObservableNode> { new ObservableNode { Value = 4 } };
Assert.AreEqual(4, observableExpression.Value);
Assert.AreEqual(3, valueChanged);
root.Children[0] = new ObservableNode { Value = 4 };
Assert.AreEqual(4, observableExpression.Value);
Assert.AreEqual(3, valueChanged);
root.Children = new ObservableCollection<ObservableNode> { new ObservableNode { Value = 4 } };
Assert.AreEqual(4, observableExpression.Value);
Assert.AreEqual(3, valueChanged);
root.Children.Add(new ObservableNode { Value = 5 });
Assert.AreEqual(4, observableExpression.Value);
Assert.AreEqual(3, valueChanged);
root.Children.RemoveAt(0);
Assert.AreEqual(5, observableExpression.Value);
Assert.AreEqual(4, valueChanged);
observableExpression.Dispose();
root.Children[0].Value = 6;
Assert.AreEqual(4, valueChanged);
}
public void ObservableExpressionHybridPropertyTest()
{
DependencyObjectNode child = new DependencyObjectNode();
ObservableNode observableChild = new ObservableNode { Value = 1 };
DependencyObjectNode root = new DependencyObjectNode { Value_ClrWrapper = 0 };
int valueChangedCount = 0;
ObservableExpression observer = new ObservableExpression(root, "Child.ObservableChild.Value");
observer.ValueChanged += (sender, e) => valueChangedCount++;
Assert.AreEqual(ObservableValue.UnsetValue, observer.Value);
root.Child_ClrWrapper = child;
child.ObservableChild_ClrWrapper = observableChild;
Assert.AreEqual(1, observer.Value);
Assert.AreEqual(1, valueChangedCount);
observableChild.Value = 2;
Assert.AreEqual(2, observer.Value);
Assert.AreEqual(2, valueChangedCount);
root.Child_ClrWrapper = null;
Assert.AreEqual(ObservableValue.UnsetValue, observer.Value);
Assert.AreEqual(3, valueChangedCount);
observer.Dispose();
root.Child_ClrWrapper = child;
Assert.AreEqual(3, valueChangedCount);
}
