protected virtual void OnElementChanged(ElementChangedEventArgs <TElement> e)
{
var args = new VisualElementChangedEventArgs(e.OldElement, e.NewElement);
for (var i = 0; i < _elementChangedHandlers.Count; i++)
{
_elementChangedHandlers[i](this, args);
}
ElementChanged?.Invoke(this, e);
}
async void OnElementChanged(ElementChangedEventArgs <Image> e)
{
await TryUpdateBitmap(e.OldElement);
UpdateAspect();
this.EnsureId();
ElevationHelper.SetElevation(this, e.NewElement);
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
protected virtual void OnElementChanged(ElementChangedEventArgs <TElement> e)
{
var args = new VisualElementChangedEventArgs(e.OldElement, e.NewElement);
foreach (EventHandler <VisualElementChangedEventArgs> handler in _elementChangedHandlers)
{
handler(this, args);
}
ElementChanged?.Invoke(this, e);
}
public void SetElement(VisualElement element)
{
if (Element != null)
{
throw new NotSupportedException("Reuse of the Shell Renderer is not supported");
}
Element = element;
OnElementSet((Shell)Element);
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(null, Element));
}
void OnElementChanged(ItemsView oldElement, ItemsView newElement)
{
TearDownOldElement(oldElement);
SetUpNewElement(newElement);
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(oldElement, newElement));
EffectUtilities.RegisterEffectControlProvider(this, oldElement, newElement);
UpdateBackgroundColor();
UpdateFlowDirection();
}
void OnElementChanged(ElementChangedEventArgs <CheckBox> e)
{
if (e.NewElement != null && !_disposed)
{
this.EnsureId();
UpdateOnColor();
UpdateIsChecked();
UpdateBackgroundColor();
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
/// <summary>
/// Notification that the associated element has changed.
/// </summary>
/// <param name="e">Event parameters.</param>
protected virtual void OnElementChanged(ElementChangedEventArgs <TElement> e)
{
if (null != e.OldElement)
{
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
e.OldElement.BatchCommitted -= OnBatchCommitted;
e.OldElement.ChildAdded -= OnChildAdded;
e.OldElement.ChildRemoved -= OnChildRemoved;
e.OldElement.ChildrenReordered -= OnChildrenReordered;
e.OldElement.FocusChangeRequested -= OnFocusChangeRequested;
var controller = e.OldElement as IElementController;
if (controller != null && controller.EffectControlProvider == this)
{
controller.EffectControlProvider = null;
}
}
var args = new VisualElementChangedEventArgs(e.OldElement, e.NewElement);
for (var i = 0; i < _elementChangedHandlers.Count; i++)
{
_elementChangedHandlers[i](this, args);
}
ElementChanged?.Invoke(this, e);
if (null != e.NewElement)
{
e.NewElement.PropertyChanged += OnElementPropertyChanged;
e.NewElement.BatchCommitted += OnBatchCommitted;
e.NewElement.ChildAdded += OnChildAdded;
e.NewElement.ChildRemoved += OnChildRemoved;
e.NewElement.ChildrenReordered += OnChildrenReordered;
e.NewElement.FocusChangeRequested += OnFocusChangeRequested;
(NativeView as IBatchable)?.BatchBegin();
UpdateAllProperties(true);
(NativeView as IBatchable)?.BatchCommit();
var controller = e.NewElement as IElementController;
if (controller != null)
{
controller.EffectControlProvider = this;
}
}
}
/// <summary>
/// Indexer for matrix.
/// </summary>
/// <param name="row">The row index.</param>
/// <param name="column">The column index.</param>
/// <returns>The value of given matrix cell.</returns>
public virtual T this[int row, int column]
{
get
{
CheckIndexes(row, column);
return(GetValue(row, column));
}
set
{
CheckIndexes(row, column);
SetValue(row, column, value);
ElementChanged?.Invoke(this, new MatrixEventArgs(row, column));
}
}
protected virtual void OnElementChanged(VisualElementChangedEventArgs e)
{
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= HandlePropertyChanged;
}
if (e.NewElement != null)
{
e.NewElement.PropertyChanged += HandlePropertyChanged;
}
ElementChanged?.Invoke(this, e);
}
void RaiseElementChanged(VisualElementChangedEventArgs e)
{
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
}
if (e.NewElement != null)
{
e.NewElement.PropertyChanged += OnElementPropertyChanged;
}
OnElementChanged(e);
ElementChanged?.Invoke(this, e);
}
protected virtual void OnElementChanged(ElementChangedEventArgs <Button> e)
{
if (e.NewElement != null)
{
UpdateFont();
UpdateText();
UpdateBitmap();
UpdateTextColor();
UpdateIsEnabled();
UpdateInputTransparent();
UpdateBackgroundColor();
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
protected virtual void OnElementChanged(ElementChangedEventArgs <BasePopup?> e)
{
if (e.NewElement != null && !isDisposed && Element is BasePopup basePopup)
{
SetEvents(basePopup);
SetColor(basePopup);
SetSize(basePopup);
SetAnchor(basePopup);
SetLightDismiss(basePopup);
Show();
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
/// <summary>
/// Provides access to the matrix fields.
/// </summary>
/// <param name="row"> Row number.</param>
/// <param name="column">Column number.</param>
/// <returns>
/// A field with given indices.
/// </returns>
public T this[int row, int column]
{
get
{
VerifyPosition(row, column);
return(GetValue(row, column));
}
set
{
VerifyPosition(row, column);
var eventArgs = new ElementChangesEventArgs <T>(GetValue(row, column), value, row, column);
SetValue(value, row, column);
ElementChanged?.Invoke(this, eventArgs);
}
}
protected virtual void OnElementChanged(ElementChangedEventArgs <MediaElement> e)
{
if (e.NewElement != null)
{
this.EnsureId();
UpdateKeepScreenOn();
UpdateLayoutParameters();
UpdateShowPlaybackControls();
UpdateSource();
UpdateBackgroundColor();
ElevationHelper.SetElevation(this, e.NewElement);
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
protected virtual void OnElementChanged(ElementChangedEventArgs <TElement> e)
{
var args = new VisualElementChangedEventArgs(e.OldElement, e.NewElement);
for (var i = 0; i < _elementChangedHandlers.Count; i++)
{
_elementChangedHandlers[i](this, args);
}
ElementChanged?.Invoke(this, e);
#if __MOBILE__
if (e.NewElement != null)
{
SetBlur((BlurEffectStyle)e.NewElement.GetValue(PlatformConfiguration.iOSSpecific.VisualElement.BlurEffectProperty));
}
#endif
}
protected virtual void OnElementChanged(ElementChangedEventArgs <TElement> e)
{
var args = new VisualElementChangedEventArgs(e.OldElement, e.NewElement);
// The list of event handlers can be changed inside the handlers. (ex.: are used CompressedLayout)
// To avoid an exception, a copy of the handlers is called.
var handlers = _elementChangedHandlers.ToArray();
foreach (var handler in handlers)
{
handler(this, args);
}
ElementChanged?.Invoke(this, e);
ElevationHelper.SetElevation(this, e.NewElement);
}
public void SetElement(VisualElement element)
{
var oldElement = Element;
if (oldElement != null)
{
oldElement.PropertyChanged -= OnElementPropertyChanged;
}
if (Element != null)
{
Element.PropertyChanged += OnElementPropertyChanged;
}
Element = element;
ViewHandler.SetVirtualView((IView)element);
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(oldElement, Element));
}
protected virtual void OnElementChanged(ElementChangedEventArgs <Label> e)
{
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
this.MaybeRequestLayout();
}
if (e.NewElement != null)
{
this.EnsureId();
if (_visualElementTracker == null)
{
_visualElementTracker = new VisualElementTracker(this);
}
e.NewElement.PropertyChanged += OnElementPropertyChanged;
SkipNextInvalidate();
UpdateText();
UpdateLineHeight();
UpdateCharacterSpacing();
UpdateTextDecorations();
if (e.OldElement?.LineBreakMode != e.NewElement.LineBreakMode)
{
UpdateLineBreakMode();
}
if (e.OldElement?.HorizontalTextAlignment != e.NewElement.HorizontalTextAlignment || e.OldElement?.VerticalTextAlignment != e.NewElement.VerticalTextAlignment)
{
UpdateGravity();
}
if (e.OldElement?.MaxLines != e.NewElement.MaxLines)
{
UpdateMaxLines();
}
UpdatePadding();
ElevationHelper.SetElevation(this, e.NewElement);
}
}
void OnElementChanged(ElementChangedEventArgs <Button> e)
{
if (e.NewElement != null && !_isDisposed)
{
this.EnsureId();
UpdateFont();
UpdateText();
UpdateBitmap();
UpdateTextColor();
UpdateIsEnabled();
UpdateInputTransparent();
UpdateBackgroundColor();
ElevationHelper.SetElevation(this, e.NewElement);
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
protected virtual void OnElementChanged(ElementChangedEventArgs <BasePopup?> e)
{
if (e.NewElement != null && !isDisposed)
{
ModalInPopover = true;
ModalPresentationStyle = UIModalPresentationStyle.Popover;
SetViewController();
SetPresentationController();
SetEvents();
SetSize();
SetLayout();
SetBackgroundColor();
SetView();
AddToCurrentPageViewController();
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
public void HandleBpmnElementEvent(BpmnElementEvent e)
{
TranslateProcessId(e);
switch (e.Type)
{
case BpmnConstants.BPMN_EVENT_CLICK:
ElementClick?.Invoke(this, e);
break;
case BpmnConstants.BPMN_EVENT_ELEMENT_CHANGED:
ElementChanged?.Invoke(this, e);
break;
case BpmnConstants.BPMN_EVENT_SHAPE_ADDED:
ShapeAdded?.Invoke(this, e);
break;
case BpmnConstants.BPMN_EVENT_SHAPE_REMOVED:
ShapeRemoved?.Invoke(this, e);
break;
case BpmnConstants.BPMN_EVENT_UPDATE_ID:
ElementIdUpdated?.Invoke(this, e);
break;
case BpmnConstants.BPMN_EVENT_CONNECTION_REMOVED:
ConnectionRemoved?.Invoke(this, e);
break;
case BpmnConstants.BPMN_EVENT_CONNECTION_ADDED:
ConnectionAdded?.Invoke(this, e);
break;
case BpmnConstants.BPMN_EVENT_ROOT_ADDED:
RootAdded?.Invoke(this, e);
break;
case BpmnConstants.BPMN_EVENT_ROOT_REMOVED:
RootRemoved?.Invoke(this, e);
break;
}
}
protected virtual void OnElementChanged(ElementChangedEventArgs <RadioButton> e)
{
if (e.NewElement != null && !_isDisposed)
{
this.EnsureId();
_textColorSwitcher = new Lazy <TextColorSwitcher>(
() => new TextColorSwitcher(TextColors, e.NewElement.UseLegacyColorManagement()));
UpdateFont();
UpdateTextColor();
UpdateInputTransparent();
UpdateBackgroundColor();
UpdateIsChecked();
UpdateContent();
ElevationHelper.SetElevation(this, e.NewElement);
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
private void OnElementChanged(ElementChangedEventArgs <TestLabelControl> e)
{
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
}
if (e.NewElement != null)
{
this.EnsureId();
if (visualElementTracker == null)
{
visualElementTracker = new VisualElementTracker(this);
}
CreateNative();
e.NewElement.PropertyChanged += OnElementPropertyChanged;
}
}
public void HandleBpmnElementEvent(BpmnElementEvent e)
{
switch (e.Type)
{
case "element.click":
ElementClick?.Invoke(this, e);
break;
case "element.changed":
ElementChanged?.Invoke(this, e);
break;
case "shape.added":
ShapeAdded?.Invoke(this, e);
break;
case "shape.removed":
ShapeRemoved?.Invoke(this, e);
break;
case "element.updateId":
ElementIdUpdated?.Invoke(this, e);
break;
case "connection.removed":
ConnectionRemoved?.Invoke(this, e);
break;
case "connection.added":
ConnectionAdded?.Invoke(this, e);
break;
case "root.added":
RootAdded?.Invoke(this, e);
break;
case "root.removed":
RootRemoved?.Invoke(this, e);
break;
}
}
protected virtual void OnElementChanged(VisualElementChangedEventArgs e)
{
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
}
if (e.NewElement != null)
{
if (Control == null)
{
Control = new Controls.Page();
Add(Control);
}
e.NewElement.PropertyChanged += OnElementPropertyChanged;
}
UpdateBackgroundImage();
ElementChanged?.Invoke(this, e);
}
protected virtual void OnElementChanged(ElementChangedEventArgs <Button> e)
{
if (e.OldElement != null)
{
_backgroundTracker?.Reset();
}
if (e.NewElement != null && !_isDisposed)
{
this.EnsureId();
UpdateFont();
UpdateText();
UpdateBitmap();
UpdateTextColor();
UpdateIsEnabled();
UpdateInputTransparent();
UpdateBackgroundColor();
UpdateDrawable();
}
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
}
protected override void UpdateElement(Input oldElement, Context oldContext)
{
var childContext = child.Context;
if (oldContext != Context)
{
if (Context.Layer != oldContext.Layer)
{
layer.Dispose();
layer = Context.Layer.AddChild(this);
}
childContext = new Context(Context, Layer);
}
child = child.UpdateElement(Element.Child, childContext);
if (oldElement != Element)
{
ElementChanged?.Invoke(this, EventArgs.Empty);
}
}
public void SetElement(VisualElement element)
{
CarouselScrollView oldElement = _view;
_view = (CarouselScrollView)element;
if (oldElement != null)
{
((IScrollViewController)oldElement).ScrollToRequested -= OnScrollToRequested;
}
if (element != null)
{
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(oldElement, element));
if (_container == null)
{
Tracker = new VisualElementTracker(this);
_container = new CustomScrollViewContainer(_view, Context);
}
Controller.ScrollToRequested += OnScrollToRequested;
LoadContent();
UpdateBackgroundColor();
UpdateOrientation();
UpdateIsEnabled();
UpdateHorizontalScrollBarVisibility();
UpdateVerticalScrollBarVisibility();
UpdateFlowDirection();
if (!string.IsNullOrEmpty(element.AutomationId))
{
ContentDescription = element.AutomationId;
}
}
}
void OnElementChanged(ElementChangedEventArgs <Label> e)
{
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
}
if (e.NewElement != null)
{
this.EnsureId();
if (_visualElementTracker == null)
{
_visualElementTracker = new VisualElementTracker(this);
}
e.NewElement.PropertyChanged += OnElementPropertyChanged;
SkipNextInvalidate();
UpdateText();
UpdateLineHeight();
if (e.OldElement?.LineBreakMode != e.NewElement.LineBreakMode)
{
UpdateLineBreakMode();
}
if (e.OldElement?.HorizontalTextAlignment != e.NewElement.HorizontalTextAlignment ||
e.OldElement?.VerticalTextAlignment != e.NewElement.VerticalTextAlignment)
{
UpdateGravity();
}
ElevationHelper.SetElevation(this, e.NewElement);
}
}
protected virtual void OnElementChanged(ElementChangedEventArgs <Frame> e)
{
ElementChanged?.Invoke(this, new VisualElementChangedEventArgs(e.OldElement, e.NewElement));
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
}
if (e.NewElement != null)
{
if (_visualElementTracker == null)
{
_visualElementTracker = new VisualElementTracker(this);
_visualElementPackager = new VisualElementPackager(this);
_visualElementPackager.Load();
}
e.NewElement.PropertyChanged += OnElementPropertyChanged;
UpdateShadow();
UpdateBackgroundColor();
UpdateCornerRadius();
}
}
