public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
VisualElement visualElement = value as VisualElement;
if (visualElement != null)
{
var frameworkElement = Platform.GetOrCreateRenderer(visualElement)?.GetNativeElement();
if (frameworkElement != null)
{
frameworkElement.Loaded += (sender, args) =>
{
visualElement.Layout(new Rectangle(0, 0, frameworkElement.ActualWidth, frameworkElement.ActualHeight));
};
frameworkElement.SizeChanged += (sender, args) =>
{
visualElement.Layout(new Rectangle(0, 0, frameworkElement.ActualWidth, frameworkElement.ActualHeight));
};
return(frameworkElement);
}
}
return(null);
}
void UpdateContent()
{
if (_currentView != null)
{
_currentView.Cleanup(); // cleanup old view
}
_currentView = Element.Content;
Control.Child = _currentView != null?Platform.GetOrCreateRenderer(_currentView).GetNativeElement() : null;
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var visualElement = value as VisualElement;
if (visualElement == null)
{
return(null);
}
var frameworkElement = Platform.GetOrCreateRenderer(visualElement)?.GetNativeElement();
return(frameworkElement);
}
void UpdateContent()
{
ContentPage page = Element as ContentPage;
if (page != null)
{
if (_currentView != null)
{
_currentView.Cleanup(); // cleanup old view
}
_currentView = page.Content;
Control.Content = _currentView != null?Platform.GetOrCreateRenderer(_currentView).GetNativeElement() : null;
}
}
private object CreateOrResizeContent(FrameworkElement parent, VisualElement visualElement)
{
var renderer = Platform.GetOrCreateRenderer(visualElement);
//if (Debugger.IsAttached)
// Console.WriteLine("Page type : " + visualElement.GetType() + " (" + (visualElement as Page).Title + ") -- Parent type : " + visualElement.Parent.GetType() + " -- " + parent.ActualHeight + "H*" + parent.ActualWidth + "W");
visualElement.Layout(new Rectangle(0, 0, parent.ActualWidth, parent.ActualHeight));
IPageController pageController = visualElement.RealParent as IPageController;
if (pageController != null)
{
pageController.ContainerArea = new Rectangle(0, 0, parent.ActualWidth, parent.ActualHeight);
}
return(renderer.GetNativeElement());
}
void LoadContent()
{
if (_currentView != null)
{
_currentView.Cleanup(); // cleanup old view
}
_currentView = Element.Content;
if (_currentView != null)
{
/*
* Wrap Content in a DockPanel : The goal is to reduce ce Measure Cycle on scolling
*/
DockPanel dockPanel = new DockPanel();
dockPanel.Children.Add(Platform.GetOrCreateRenderer(_currentView).GetNativeElement());
Control.Content = dockPanel;
}
else
{
Control.Content = null;
}
UpdateMargins();
}
private object CreateOrResizeContent(FrameworkElement parent, VisualElement visualElement)
{
var renderer = Platform.GetOrCreateRenderer(visualElement);
//if (Debugger.IsAttached)
// Console.WriteLine("Page type : " + visualElement.GetType() + " (" + (visualElement as Page).Title + ") -- Parent type : " + visualElement.Parent.GetType() + " -- " + parent.ActualHeight + "H*" + parent.ActualWidth + "W");
var actualRect = new Rectangle(0, 0, parent.ActualWidth, parent.ActualHeight);
visualElement.Layout(actualRect);
// ControlTemplate adds an additional layer through which to send sizing changes.
var contentPage = visualElement as ContentPage;
if (contentPage?.ControlTemplate != null)
{
contentPage.Content?.Layout(actualRect);
}
else
{
var contentView = visualElement as ContentView;
if (contentView?.ControlTemplate != null)
{
contentView.Content?.Layout(actualRect);
}
}
IPageController pageController = visualElement.RealParent as IPageController;
if (pageController != null)
{
pageController.ContainerArea = actualRect;
}
return(renderer.GetNativeElement());
}