internal static void SyncColumnProperty <T>(AvaloniaObject column, AvaloniaObject content, AvaloniaProperty <T> contentProperty, AvaloniaProperty <T> columnProperty)
{
if (!column.IsSet(columnProperty))
{
content.ClearValue(contentProperty);
}
else
{
content.SetValue(contentProperty, column.GetValue(columnProperty));
}
}
public static object UpdateDependencyColor(this AvaloniaObject depo, AvaloniaProperty dp, Color newColor)
{
if (!newColor.IsDefault)
{
depo.SetValue(dp, newColor.ToBrush());
}
else
{
depo.ClearValue(dp);
}
return(depo.GetValue(dp));
}
/// <summary>
/// Gets a diagnostic for a <see cref="AvaloniaProperty"/> on a <see cref="AvaloniaObject"/>.
/// </summary>
/// <param name="o">The object.</param>
/// <param name="property">The property.</param>
/// <returns>
/// A <see cref="AvaloniaPropertyValue"/> that can be used to diagnose the state of the
/// property on the object.
/// </returns>
public static AvaloniaPropertyValue GetDiagnostic(this AvaloniaObject o, AvaloniaProperty property)
{
var set = o.GetSetValues();
PriorityValue value;
if (set.TryGetValue(property, out value))
{
return(new AvaloniaPropertyValue(
property,
o.GetValue(property),
(BindingPriority)value.ValuePriority,
value.GetDiagnostic()));
}
else
{
return(new AvaloniaPropertyValue(
property,
o.GetValue(property),
BindingPriority.Unset,
"Unset"));
}
}
private Layoutable?GetDependencyElement(AvaloniaProperty property, AvaloniaObject child)
{
var dependency = child.GetValue(property);
if (dependency is Layoutable layoutable)
{
if (Children.Contains((ILayoutable)layoutable))
{
return(layoutable);
}
throw new ArgumentException($"RelativePanel error: Element does not exist in the current context: {property.Name}");
}
return(null);
}
/// <summary>
/// Returns an <see cref="ObservableObject{T}"/> wrapper around the RegionContext value. The RegionContext
/// will be set on any views (dependency objects) that are inside the <see cref="IRegion.Views"/> collection by
/// the <see cref="Behaviors.BindRegionContextToAvaloniaObjectBehavior"/> Behavior.
/// The RegionContext will also be set to the control that hosts the Region, by the <see cref="Behaviors.SyncRegionContextWithHostBehavior"/> Behavior.
///
/// If the <see cref="ObservableObject{T}"/> wrapper does not already exist, an empty one will be created. This way, an observer can
/// notify when the value is set for the first time.
/// </summary>
/// <param name="view">Any view that hold the RegionContext value. </param>
/// <returns>Wrapper around the Regioncontext value. </returns>
public static ObservableObject <object> GetObservableContext(AvaloniaObject view)
{
if (view == null)
{
throw new ArgumentNullException(nameof(view));
}
ObservableObject <object> context = view.GetValue(ObservableRegionContextProperty) as ObservableObject <object>;
if (context == null)
{
context = new ObservableObject <object>();
view.SetValue(ObservableRegionContextProperty, context);
}
return(context);
}
/// <summary>
/// Returns an <see cref="ObservableObject{T}"/> wrapper that can hold an <see cref="IRegion"/>. Using this wrapper
/// you can detect when an <see cref="IRegion"/> has been created by the <see cref="RegionAdapterBase{T}"/>.
///
/// If the <see cref="ObservableObject{T}"/> wrapper does not yet exist, a new wrapper will be created. When the region
/// gets created and assigned to the wrapper, you can use the <see cref="ObservableObject{T}.PropertyChanged"/> event
/// to get notified of that change.
/// </summary>
/// <param name="view">The view that will host the region. </param>
/// <returns>Wrapper that can hold an <see cref="IRegion"/> value and can notify when the <see cref="IRegion"/> value changes. </returns>
public static ObservableObject <IRegion> GetObservableRegion(AvaloniaObject view)
{
if (view == null)
{
throw new ArgumentNullException(nameof(view));
}
ObservableObject <IRegion> regionWrapper = view.GetValue(ObservableRegionProperty) as ObservableObject <IRegion>;
if (regionWrapper == null)
{
regionWrapper = new ObservableObject <IRegion>();
view.SetValue(ObservableRegionProperty, regionWrapper);
}
return(regionWrapper);
}
private IEnumerable <(AvaloniaProperty, object)> CollectChangedValue(AvaloniaObject obj, IEnumerable <AvaloniaProperty> aprops)
{
foreach (var aprop in aprops)
{
if (aprop.Name == "Parent")
{
continue;
}
if (aprop.IsReadOnly)
{
continue;
}
if (obj.IsSet(aprop))
{
var objValue = obj.GetValue(aprop);
yield return(aprop, objValue);
}
}
}
/// <summary>
/// Gets the value of the Bottom attached property for a control.
/// </summary>
/// <param name="element">The control.</param>
/// <returns>The control's bottom coordinate.</returns>
public static double GetBottom(AvaloniaObject element)
{
return element.GetValue(BottomProperty);
}
/// <summary>
/// Gets renderer attached property.
/// </summary>
/// <param name="obj">The avalonia object.</param>
/// <returns>The shape renderer property.</returns>
public static IShapeRenderer GetRenderer(AvaloniaObject obj)
{
return(obj.GetValue(RendererProperty));
}
public static string GetName(AvaloniaObject avaloniaObject) => avaloniaObject.GetValue(NameProperty);
/// <summary>
/// Gets the value of the RowSpan attached property for a control.
/// </summary>
/// <param name="element">The control.</param>
/// <returns>The control's row span.</returns>
public static int GetRowSpan(AvaloniaObject element)
{
return(element.GetValue(RowSpanProperty));
}
public static string GetFoo(AvaloniaObject target) => (string)target.GetValue(FooProperty);
public static bool GetShowAlternation(AvaloniaObject obj)
{
return((bool)obj.GetValue(ShowAlternationProperty));
}
/// <summary>
/// Gets renderer options attached property.
/// </summary>
/// <param name="obj">The avalonia object.</param>
/// <returns>The shape renderer property.</returns>
public static ShapeRenderer GetRenderer(AvaloniaObject obj)
{
return obj.GetValue(RendererProperty);
}
/// <summary>
/// Gets the value of the Top attached property for a control.
/// </summary>
/// <param name="element">The control.</param>
/// <returns>The control's top coordinate.</returns>
public static double GetTop(AvaloniaObject element)
{
return element.GetValue(TopProperty);
}
/// <summary>
/// Gets the value of the RowSpan attached property for a control.
/// </summary>
/// <param name="element">The control.</param>
/// <returns>The control's row span.</returns>
public static int GetRowSpan(AvaloniaObject element)
{
return element.GetValue(RowSpanProperty);
}
/// <summary>
/// Gets the value of the Column attached property for a control.
/// </summary>
/// <param name="element">The control.</param>
/// <returns>The control's column.</returns>
public static int GetColumn(AvaloniaObject element)
{
return element.GetValue(ColumnProperty);
}
public static SolidColorBrush GetSwitchTrackOffBackground(AvaloniaObject element)
{
return((SolidColorBrush)element.GetValue(SwitchTrackOffBackgroundProperty));
}
public static bool GetIsFileDragDropEnabled(AvaloniaObject obj)
{
return((bool)obj.GetValue(IsFileDragDropEnabledProperty));
}
public static string GetLabel(AvaloniaObject element) => (string)element.GetValue(LabelProperty);
/// <summary>
/// Gets the value of the Right attached property for a control.
/// </summary>
/// <param name="element">The control.</param>
/// <returns>The control's right coordinate.</returns>
public static double GetRight(AvaloniaObject element)
{
return element.GetValue(RightProperty);
}
/// <summary>
/// Gets the value of the BitmapInterpolationMode attached property for a control.
/// </summary>
/// <param name="element">The control.</param>
/// <returns>The control's left coordinate.</returns>
public static BitmapInterpolationMode GetBitmapInterpolationMode(AvaloniaObject element)
{
return(element.GetValue(BitmapInterpolationModeProperty));
}
public static ICommand GetCommand(AvaloniaObject element)
{
return(element.GetValue(CommandProperty));
}
public static KeyGesture GetHotKey(AvaloniaObject target) => target.GetValue(HotKeyProperty);
public static object GetAlignRightWith(AvaloniaObject obj)
{
return((object)obj.GetValue(AlignRightWithProperty));
}
public static bool GetFileDragDropTarget(AvaloniaObject obj)
{
return((bool)obj.GetValue(FileDragDropTargetProperty));
}
public static bool GetAlignVerticalCenterWithPanel(AvaloniaObject obj)
{
return((bool)obj.GetValue(AlignVerticalCenterWithPanelProperty));
}
public static ISelection GetSelection(AvaloniaObject obj)
{
return(obj.GetValue(SelectionProperty));
}
public static object GetAlignVerticalCenterWith(AvaloniaObject obj)
{
return((object)obj.GetValue(AlignVerticalCenterWithProperty));
}
/// <summary>
/// Gets the value of the Column attached property for a control.
/// </summary>
/// <param name="element">The control.</param>
/// <returns>The control's column.</returns>
public static int GetColumn(AvaloniaObject element)
{
return(element.GetValue(ColumnProperty));
}
public static object GetBelow(AvaloniaObject obj)
{
return((object)obj.GetValue(BelowProperty));
}
public static NativeMenu GetMenu(AvaloniaObject o) => o.GetValue(MenuProperty);
public static object GetAbove(AvaloniaObject obj)
{
return((object)obj.GetValue(AboveProperty));
}
public static KeyGesture GetHotKey(AvaloniaObject target) => target.GetValue(HotKeyProperty);
public static object GetRightOf(AvaloniaObject obj)
{
return((object)obj.GetValue(RightOfProperty));
}
/// <summary>
/// Gets data flow attached property.
/// </summary>
/// <param name="obj">The avalonia object.</param>
/// <returns>The data flow property.</returns>
public static IDataFlow GetDataFlow(AvaloniaObject obj)
{
return(obj.GetValue(DataFlowProperty));
}
public static bool GetAlignBottomWithPanel(AvaloniaObject obj)
{
return((bool)obj.GetValue(AlignBottomWithPanelProperty));
}
