public void SetElement(VisualElement element)
{
if (element != null && !(element is TabbedPage))
{
throw new ArgumentException("Element must be a TabbedPage", "element");
}
var oldElement = Page;
Element = element;
if (oldElement != null)
{
oldElement.PropertyChanged -= OnElementPropertyChanged;
((INotifyCollectionChanged)oldElement.Children).CollectionChanged -= OnPagesChanged;
}
if (element != null)
{
if (_tracker == null)
{
_tabs = new TabsControl();
_canvas = new Canvas();
_canvas.ChildrenTransitions = new TransitionCollection
{
new EntranceThemeTransition()
};
Tracker = new BackgroundTracker <Canvas>(Panel.BackgroundProperty)
{
Element = (Page)element,
Control = _canvas,
Container = _canvas
};
_canvas.Loaded += OnLoaded;
_canvas.Unloaded += OnUnloaded;
}
_tabs.DataContext = element;
OnPagesChanged(Page.Children, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
UpdateCurrentPage();
UpdateBarTextColor();
UpdateBarBackgroundColor();
((INotifyCollectionChanged)Page.Children).CollectionChanged += OnPagesChanged;
element.PropertyChanged += OnElementPropertyChanged;
}
OnElementChanged(new VisualElementChangedEventArgs(oldElement, element));
}
public void SetElement(VisualElement element)
{
if (element != null && !(element is TabbedPage))
throw new ArgumentException("Element must be a TabbedPage", "element");
var oldElement = Page;
Element = element;
if (oldElement != null)
{
oldElement.PropertyChanged -= OnElementPropertyChanged;
((INotifyCollectionChanged)oldElement.Children).CollectionChanged -= OnPagesChanged;
}
if (element != null)
{
if (_tracker == null)
{
_tabs = new TabsControl();
_canvas = new Canvas();
_canvas.ChildrenTransitions = new TransitionCollection
{
new EntranceThemeTransition()
};
Tracker = new BackgroundTracker<Canvas>(Panel.BackgroundProperty)
{
Element = (Page)element,
Control = _canvas,
Container = _canvas
};
_canvas.Loaded += OnLoaded;
_canvas.Unloaded += OnUnloaded;
}
_tabs.DataContext = element;
OnPagesChanged(Page.Children, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
UpdateCurrentPage();
UpdateBarTextColor();
UpdateBarBackgroundColor();
((INotifyCollectionChanged)Page.Children).CollectionChanged += OnPagesChanged;
element.PropertyChanged += OnElementPropertyChanged;
}
OnElementChanged(new VisualElementChangedEventArgs(oldElement, element));
}