private static void OnIsCheckedPropertyChanged(
IReactiveObject source, ReactivePropertyChangeEventArgs <bool?> args)
{
var button = source as ToggleButton;
if (button == null)
{
return;
}
bool?newValue = args.NewValue;
if (newValue == true)
{
button.OnChecked();
}
else if (newValue == false)
{
button.OnUnchecked();
}
else
{
button.OnIndeterminate();
}
}
private static void ItemsSourceChanged(
IReactiveObject source, ReactivePropertyChangeEventArgs <IEnumerable> change)
{
var itemsControl = (ItemsControl)source;
if (change.OldValue is INotifyCollectionChanged)
{
itemsControl.changingItems.Dispose();
}
var observableCollection = change.NewValue as INotifyCollectionChanged;
if (observableCollection != null)
{
itemsControl.changingItems =
Observable.FromEventPattern <NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>(
handler => new NotifyCollectionChangedEventHandler(handler),
handler => observableCollection.CollectionChanged += handler,
handler => observableCollection.CollectionChanged -= handler).Subscribe(
itemsControl.OnNextItemChange);
}
itemsControl.isItemsSourceNew = true;
itemsControl.InvalidateMeasure();
}
/// <summary>
/// Invalidates the sender's Measure layout pass when a <see cref = "ReactiveProperty{T}">ReactiveProperty</see> value is changed.
/// </summary>
/// <typeparam name = "T">The type of the <see cref = "ReactiveProperty{T}">ReactiveProperty</see>.</typeparam>
/// <param name = "sender">The ReactiveObject whose <see cref = "ReactiveProperty{T}">ReactiveProperty</see> has changed.</param>
/// <param name = "args">An instance of <see cref = "ReactivePropertyChangeEventArgs{T}">ReactivePropertyChangeEventArgs</see> that carries information about the change.</param>
public static void InvalidateMeasure <T>(IReactiveObject sender, ReactivePropertyChangeEventArgs <T> args)
{
var uiElement = sender as IElement;
if (uiElement != null)
{
uiElement.InvalidateMeasure();
}
}
private static void ChildPropertyChangedCallback(
IReactiveObject source, ReactivePropertyChangeEventArgs <IElement> change)
{
var border = (Border)source;
border.InvalidateMeasure();
IElement oldChild = change.OldValue;
if (oldChild != null)
{
oldChild.VisualParent = null;
}
IElement newChild = change.NewValue;
if (newChild != null)
{
newChild.VisualParent = border;
}
}
private static void ContentPropertyChangedCallback(
IReactiveObject source, ReactivePropertyChangeEventArgs <IElement> change)
{
var contentControl = (ContentControl)source;
contentControl.InvalidateMeasure();
IElement oldContent = change.OldValue;
if (oldContent != null)
{
oldContent.VisualParent = null;
}
IElement newContent = change.NewValue;
if (newContent != null)
{
newContent.VisualParent = contentControl;
}
contentControl.OnContentChanged(oldContent, newContent);
}
private static void ItemsPanelChanged(IReactiveObject source, ReactivePropertyChangeEventArgs <Panel> change)
{
var itemsControl = (ItemsControl)source;
Panel newPanel = change.NewValue;
Panel oldPanel = change.OldValue;
if (oldPanel != null)
{
oldPanel.VisualParent = null;
}
if (newPanel != null)
{
if (!(newPanel.Children is ITemplatedList <IElement>))
{
throw new NotSupportedException(
"ItemsControl requires a panel whose Children collection implements ITemplatedList<IElement>");
}
newPanel.VisualParent = itemsControl;
}
itemsControl.InvalidateMeasure();
}
private static void WidthChangedCallback(
IReactiveObject source, ReactivePropertyChangeEventArgs<double> reactivePropertyChange)
{
((TestBindingObject)source).widthPropertyChangedCalledbackCount++;
}
private static void WidthChangedCallback(
IReactiveObject source, ReactivePropertyChangeEventArgs <double> reactivePropertyChange)
{
((TestBindingObject)source).widthPropertyChangedCalledbackCount++;
}
private static void DataContextChanged(IReactiveObject source, ReactivePropertyChangeEventArgs<object> args)
{
((UIElement)source).InvalidateMeasureOnDataContextInheritors();
}
private static void ChildPropertyChangedCallback(
IReactiveObject source, ReactivePropertyChangeEventArgs<IElement> change)
{
var border = (Border)source;
border.InvalidateMeasure();
IElement oldChild = change.OldValue;
if (oldChild != null)
{
oldChild.VisualParent = null;
}
IElement newChild = change.NewValue;
if (newChild != null)
{
newChild.VisualParent = border;
}
}
private static void WidthChangedCallback(
IReactiveObject source, ReactivePropertyChangeEventArgs <double> reactivePropertyChange)
{
((TestBindingObject)source).WidthChangedCallback(
reactivePropertyChange.OldValue, reactivePropertyChange.NewValue);
}
private static void WidthChangedCallback(
IReactiveObject source, ReactivePropertyChangeEventArgs<double> reactivePropertyChange)
{
((TestBindingObject)source).WidthChangedCallback(
reactivePropertyChange.OldValue, reactivePropertyChange.NewValue);
}
private static void ItemsSourceChanged(
IReactiveObject source, ReactivePropertyChangeEventArgs<IEnumerable> change)
{
var itemsControl = (ItemsControl)source;
if (change.OldValue is INotifyCollectionChanged)
{
itemsControl.changingItems.Dispose();
}
var observableCollection = change.NewValue as INotifyCollectionChanged;
if (observableCollection != null)
{
itemsControl.changingItems =
Observable.FromEventPattern<NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>(
handler => new NotifyCollectionChangedEventHandler(handler),
handler => observableCollection.CollectionChanged += handler,
handler => observableCollection.CollectionChanged -= handler).Subscribe(
itemsControl.OnNextItemChange);
}
itemsControl.isItemsSourceNew = true;
itemsControl.InvalidateMeasure();
}
private static void ItemsPanelChanged(IReactiveObject source, ReactivePropertyChangeEventArgs<Panel> change)
{
var itemsControl = (ItemsControl)source;
Panel newPanel = change.NewValue;
Panel oldPanel = change.OldValue;
if (oldPanel != null)
{
oldPanel.VisualParent = null;
}
if (newPanel != null)
{
if (!(newPanel.Children is ITemplatedList<IElement>))
{
throw new NotSupportedException(
"ItemsControl requires a panel whose Children collection implements ITemplatedList<IElement>");
}
newPanel.VisualParent = itemsControl;
}
itemsControl.InvalidateMeasure();
}
private static void OnIsCheckedPropertyChanged(
IReactiveObject source, ReactivePropertyChangeEventArgs<bool?> args)
{
var button = source as ToggleButton;
if (button == null)
{
return;
}
bool? newValue = args.NewValue;
if (newValue == true)
{
button.OnChecked();
}
else if (newValue == false)
{
button.OnUnchecked();
}
else
{
button.OnIndeterminate();
}
}
