public void Add(IView child)
{
_ = NativeView ?? throw new InvalidOperationException($"{nameof(NativeView)} should have been set by base class.");
_ = VirtualView ?? throw new InvalidOperationException($"{nameof(VirtualView)} should have been set by base class.");
_ = MauiContext ?? throw new InvalidOperationException($"{nameof(MauiContext)} should have been set by base class.");
NativeView.AddView(child.ToNative(MauiContext), 0);
}
public void Update(int index, IView child)
{
_ = NativeView ?? throw new InvalidOperationException($"{nameof(NativeView)} should have been set by base class.");
_ = VirtualView ?? throw new InvalidOperationException($"{nameof(VirtualView)} should have been set by base class.");
_ = MauiContext ?? throw new InvalidOperationException($"{nameof(MauiContext)} should have been set by base class.");
NativeView.RemoveViewAt(index);
NativeView.AddView(child.ToNative(MauiContext), index);
}
public void Insert(int index, IView child)
{
_ = NativeView ?? throw new InvalidOperationException($"{nameof(NativeView)} should have been set by base class.");
_ = VirtualView ?? throw new InvalidOperationException($"{nameof(VirtualView)} should have been set by base class.");
_ = MauiContext ?? throw new InvalidOperationException($"{nameof(MauiContext)} should have been set by base class.");
var targetIndex = VirtualView.GetLayoutHandlerIndex(child);
NativeView.AddView(child.ToNative(MauiContext), targetIndex);
}
void UpdateContent()
{
_ = NativeView ?? throw new InvalidOperationException($"{nameof(NativeView)} should have been set by base class.");
_ = MauiContext ?? throw new InvalidOperationException($"{nameof(MauiContext)} should have been set by base class.");
_ = VirtualView ?? throw new InvalidOperationException($"{nameof(VirtualView)} should have been set by base class.");
NativeView.RemoveAllViews();
if (VirtualView.PresentedContent is IView view)
{
NativeView.AddView(view.ToNative(MauiContext));
}
}
public override void SetVirtualView(IView view)
{
base.SetVirtualView(view);
_ = NativeView ?? throw new InvalidOperationException($"{nameof(NativeView)} should have been set by base class.");
_ = VirtualView ?? throw new InvalidOperationException($"{nameof(VirtualView)} should have been set by base class.");
_ = MauiContext ?? throw new InvalidOperationException($"{nameof(MauiContext)} should have been set by base class.");
NativeView.CrossPlatformMeasure = VirtualView.Measure;
NativeView.CrossPlatformArrange = VirtualView.Arrange;
NativeView.AddView(VirtualView.Content.ToNative(MauiContext));
}
public override void SetVirtualView(IView view)
{
base.SetVirtualView(view);
_ = NativeView ?? throw new InvalidOperationException($"{nameof(NativeView)} should have been set by base class.");
_ = VirtualView ?? throw new InvalidOperationException($"{nameof(VirtualView)} should have been set by base class.");
_ = MauiContext ?? throw new InvalidOperationException($"{nameof(MauiContext)} should have been set by base class.");
NativeView.CrossPlatformMeasure = VirtualView.Measure;
NativeView.CrossPlatformArrange = VirtualView.Arrange;
NativeView.RemoveAllViews();
//var wrap = ViewGroup.LayoutParams.WrapContent;
NativeView.AddView(VirtualView.Content.ToNative(MauiContext)); // , new ViewGroup.LayoutParams(wrap, wrap));
}
public override void SetVirtualView(IView view)
{
base.SetVirtualView(view);
_ = NativeView ?? throw new InvalidOperationException($"{nameof(NativeView)} should have been set by base class.");
_ = VirtualView ?? throw new InvalidOperationException($"{nameof(VirtualView)} should have been set by base class.");
_ = MauiContext ?? throw new InvalidOperationException($"{nameof(MauiContext)} should have been set by base class.");
NativeView.CrossPlatformMeasure = VirtualView.CrossPlatformMeasure;
NativeView.CrossPlatformArrange = VirtualView.CrossPlatformArrange;
NativeView.RemoveAllViews();
foreach (var child in VirtualView.OrderByZIndex())
{
NativeView.AddView(child.ToNative(MauiContext));
}
}
public override void SetVirtualView(IView view)
{
base.SetVirtualView(view);
var newContent = VirtualView.Content?.ToNative(MauiContext);
if (_content == null || newContent != _content)
{
if (_content != null)
{
NativeView.RemoveView(_content);
}
_content = newContent;
if (_content != null)
{
NativeView.AddView(_content);
}
}
}
void UpdateFlyout()
{
_ = MauiContext ?? throw new InvalidOperationException($"{nameof(MauiContext)} should have been set by base class.");
_ = VirtualView.Flyout.ToNative(MauiContext);
var newFlyoutView = VirtualView.Flyout.GetNative(true);
if (_flyoutView == newFlyoutView)
{
return;
}
if (_flyoutView != null)
{
_flyoutView.RemoveFromParent();
}
_flyoutView = newFlyoutView;
if (_flyoutView == null)
{
return;
}
_flyoutView.LayoutParameters =
new DrawerLayout.LayoutParams(
DrawerLayout.LayoutParams.WrapContent,
DrawerLayout.LayoutParams.MatchParent,
(int)GravityFlags.Start);
NativeView.AddView(_flyoutView);
if (VirtualView.Flyout.Background == null && Context?.Theme != null)
{
var colors = Context.Theme.ObtainStyledAttributes(new[] { global::Android.Resource.Attribute.ColorBackground });
_flyoutView.SetBackgroundColor(new global::Android.Graphics.Color(colors.GetColor(0, 0)));
}
}
void EnsureZIndexOrder(IView child)
{
if (NativeView.ChildCount == 0)
{
return;
}
AView nativeChildView = child.ToNative(MauiContext !);
var currentIndex = IndexOf(NativeView, nativeChildView);
if (currentIndex == -1)
{
return;
}
var targetIndex = VirtualView.GetLayoutHandlerIndex(child);
if (currentIndex != targetIndex)
{
NativeView.RemoveViewAt(currentIndex);
NativeView.AddView(nativeChildView, targetIndex);
}
}