void ApplyTranslation(EvasMap map, ERect geometry, ref bool changed)
{
var shiftX = Forms.ConvertToScaledPixel(Element.TranslationX);
var shiftY = Forms.ConvertToScaledPixel(Element.TranslationY);
// apply translation, i.e. move/shift the object a little
if (shiftX != 0 || shiftY != 0)
{
if (changed)
{
// special care is taken to apply the translation last
Point3D p;
for (int i = 0; i < 4; i++)
{
p = map.GetPointCoordinate(i);
p.X += shiftX;
p.Y += shiftY;
map.SetPointCoordinate(i, p);
}
}
else
{
// in case when we only need translation, then construct the map in a simpler way
geometry.X += shiftX;
geometry.Y += shiftY;
map.PopulatePoints(geometry, 0);
changed = true;
}
}
}
protected override EvasObject OnGetContent(Cell cell, string part)
{
if (part == MainContentPart)
{
var viewCell = (ViewCell)cell;
var listView = viewCell?.RealParent as ListView;
// It is a condition for reusable the cell
if (listView != null &&
listView.HasUnevenRows == false &&
!(listView.ItemTemplate is DataTemplateSelector) && !GetCurrentItem().IsGroupItem)
{
return(CreateReusableContent(viewCell));
}
Platform.GetRenderer(viewCell.View)?.Dispose();
var renderer = Platform.GetOrCreateRenderer(viewCell.View);
double height = viewCell.RenderHeight;
height = height > 0 ? height : FindCellContentHeight(viewCell);
renderer.NativeView.MinimumHeight = Forms.ConvertToScaledPixel(height);
(renderer as LayoutRenderer)?.RegisterOnLayoutUpdated();
UpdatePropagateEvent(viewCell.View);
return(renderer.NativeView);
}
return(null);
}
public SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
{
if (null == NativeView)
{
return(new SizeRequest(new Size(0, 0)));
}
else
{
int availableWidth = Forms.ConvertToScaledPixel(widthConstraint);
int availableHeight = Forms.ConvertToScaledPixel(heightConstraint);
if (availableWidth < 0)
{
availableWidth = int.MaxValue;
}
if (availableHeight < 0)
{
availableHeight = int.MaxValue;
}
Size measured;
var nativeViewMeasurable = NativeView as Native.IMeasurable;
if (nativeViewMeasurable != null)
{
measured = nativeViewMeasurable.Measure(availableWidth, availableHeight).ToDP();
}
else
{
measured = Measure(availableWidth, availableHeight).ToDP();
}
return(new SizeRequest(measured, MinimumSize()));
}
}
void OnLayout()
{
if (Geometry.Width == 0 || Geometry.Height == 0)
{
return;
}
var bound = Geometry;
int navBarHeight;
if (_navBarIsVisible)
{
var navBound = bound;
navBarHeight = Forms.ConvertToScaledPixel(_navBar.GetDefaultHeight());
navBound.Height = navBarHeight;
_navBar.Show();
_navBar.Geometry = navBound;
_navBar.RaiseTop();
}
else
{
navBarHeight = 0;
_navBar.Hide();
}
bound.Y += navBarHeight;
bound.Height -= navBarHeight;
_viewStack.Geometry = bound;
}
public static SKMatrix ToSkia(this Transform transform)
{
SKMatrix skMatrix = SKMatrix.CreateIdentity();
if (transform == null)
{
return(skMatrix);
}
Matrix matrix = transform.Value;
skMatrix.Values = new float[] {
(float)matrix.M11,
(float)matrix.M21,
Forms.ConvertToScaledPixel(matrix.OffsetX),
(float)matrix.M12,
(float)matrix.M22,
Forms.ConvertToScaledPixel(matrix.OffsetY),
0,
0,
1
};
return(skMatrix);
}
protected override EvasObject OnGetContent(Cell cell, string part)
{
if (part == ImagePart)
{
var imgCell = cell as ImageCell;
int pixelSize = Forms.ConvertToScaledPixel(imgCell.RenderHeight);
if (pixelSize <= 0)
{
pixelSize = this.GetDefaultHeightPixel();
}
var image = new Native.Image(Forms.NativeParent)
{
MinimumWidth = pixelSize,
MinimumHeight = pixelSize
};
image.SetAlignment(-1.0, -1.0); // fill
image.SetWeight(1.0, 1.0); // expand
var task = image.LoadFromImageSourceAsync(imgCell.ImageSource);
return(image);
}
else
{
return(null);
}
}
protected override ElmSharp.Size Measure(int availableWidth, int availableHeight)
{
var size = _image.Measure(availableHeight, availableHeight);
size.Width += Forms.ConvertToScaledPixel(Element.Padding.HorizontalThickness);
size.Height += Forms.ConvertToScaledPixel(Element.Padding.VerticalThickness);
return(size);
}
void Initialize(EvasObject parent)
{
_menu = new GenList(parent)
{
BackgroundColor = EColor.Transparent,
Style = "solid/default",
};
_menu.ItemSelected += (s, e) =>
{
_flyoutMenu.TryGetValue(e.Item.Data as Item, out Element element);
SelectedItemChanged?.Invoke(this, new SelectedItemChangedEventArgs(element, -1));
};
_menu.Show();
PackEnd(_menu);
_defaultClass = new GenItemClass("double_label")
{
GetTextHandler = (obj, part) =>
{
if (part == "elm.text")
{
return(((Item)obj).Title);
}
else
{
return(null);
}
},
GetContentHandler = (obj, part) =>
{
if (part == "elm.swallow.icon")
{
var icon = ((Item)obj).Icon;
if (icon != null)
{
var image = new Native.Image(parent)
{
MinimumWidth = Forms.ConvertToScaledPixel(24),
MinimumHeight = Forms.ConvertToScaledPixel(24)
};
var result = image.LoadFromImageSourceAsync(icon);
return(image);
}
else
{
return(null);
}
}
else
{
return(null);
}
}
};
}
protected override EvasObject OnGetContent(Cell cell, string part)
{
if (part == MainContentPart)
{
var entryCell = cell as EntryCell;
int pixelHeight = Forms.ConvertToScaledPixel(entryCell.RenderHeight);
pixelHeight = pixelHeight > 0 ? pixelHeight : Forms.ConvertToPixel(s_defaultHeight);
var label = new Label()
{
HorizontalOptions = LayoutOptions.Start,
VerticalOptions = LayoutOptions.Center,
VerticalTextAlignment = TextAlignment.Center,
FontSize = -1
};
label.SetBinding(Label.TextProperty, new Binding(EntryCell.LabelProperty.PropertyName));
label.SetBinding(Label.TextColorProperty, new Binding(EntryCell.LabelColorProperty.PropertyName, converter: new DefaultColorConverter()));
var entry = new Entry()
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.Center,
FontSize = -1,
};
entry.SetBinding(Entry.TextProperty, new Binding(EntryCell.TextProperty.PropertyName, BindingMode.TwoWay));
entry.SetBinding(Entry.PlaceholderProperty, new Binding(EntryCell.PlaceholderProperty.PropertyName));
entry.SetBinding(InputView.KeyboardProperty, new Binding(EntryCell.KeyboardProperty.PropertyName));
entry.SetBinding(Entry.HorizontalTextAlignmentProperty, new Binding(EntryCell.HorizontalTextAlignmentProperty.PropertyName));
var layout = new StackLayout()
{
Orientation = StackOrientation.Horizontal,
Children =
{
label,
entry
}
};
layout.Parent = cell;
layout.BindingContext = entryCell;
layout.MinimumHeightRequest = Forms.ConvertToScaledDP(pixelHeight);
var renderer = Platform.GetOrCreateRenderer(layout);
(renderer as LayoutRenderer)?.RegisterOnLayoutUpdated();
var nativeView = renderer.NativeView;
nativeView.PropagateEvents = false;
nativeView.MinimumHeight = pixelHeight;
_cacheCandidate[nativeView] = layout;
nativeView.Deleted += (sender, e) =>
{
_cacheCandidate.Remove(sender as EvasObject);
};
return(nativeView);
}
return(null);
}
void Initialize(EvasObject parent)
{
_menu = new GenList(parent)
{
BackgroundColor = EColor.Transparent,
Style = "solid/default",
};
_menu.ItemSelected += (s, e) =>
{
MenuItemSelected?.Invoke(this, e);
};
_menu.Show();
PackEnd(_menu);
_defaultClass = new GenItemClass("double_label")
{
GetTextHandler = (obj, part) =>
{
if (part == "elm.text")
{
return(((Item)obj).Title);
}
else
{
return(null);
}
},
GetContentHandler = (obj, part) =>
{
if (part == "elm.swallow.icon")
{
var icon = ((Item)obj).Icon;
if (icon != null)
{
var image = new ElmSharp.Image(parent)
{
MinimumWidth = Forms.ConvertToScaledPixel(24),
MinimumHeight = Forms.ConvertToScaledPixel(24)
};
var result = image.Load(ResourcePath.GetPath(icon));
return(image);
}
else
{
return(null);
}
}
else
{
return(null);
}
}
};
}
EvasObject GetContent(object data, string part)
{
ShellSection section = data as ShellSection;
var box = new EBox(Forms.NativeParent);
box.Show();
EImage icon = null;
if (section.Icon != null)
{
icon = new EImage(Forms.NativeParent);
icon.Show();
box.PackEnd(icon);
_ = icon.LoadFromImageSourceAsync(section.Icon);
}
var title = new Native.Label(Forms.NativeParent)
{
Text = section.Title,
FontSize = Forms.ConvertToEflFontPoint(14),
HorizontalTextAlignment = Native.TextAlignment.Start,
VerticalTextAlignment = Native.TextAlignment.Center,
};
title.Show();
box.PackEnd(title);
int iconPadding = Forms.ConvertToScaledPixel(this.GetIconPadding());
int iconSize = Forms.ConvertToScaledPixel(this.GetIconSize());
int cellHeight = iconPadding * 2 + iconSize;
box.SetLayoutCallback(() =>
{
var bound = box.Geometry;
int leftMargin = iconPadding;
if (icon != null)
{
var iconBound = bound;
iconBound.X += iconPadding;
iconBound.Y += iconPadding;
iconBound.Width = iconSize;
iconBound.Height = iconSize;
icon.Geometry = iconBound;
leftMargin = (2 * iconPadding + iconSize);
}
bound.X += leftMargin;
bound.Width -= leftMargin;
title.Geometry = bound;
});
box.MinimumHeight = cellHeight;
return(box);
}
void UpdateHorizontalScrollStep(bool initialize)
{
var step = Specific.GetHorizontalScrollStep(Element);
if (initialize && step == -1)
{
return;
}
Control.HorizontalStepSize = step != -1 ? Forms.ConvertToScaledPixel(step) : _defaultHorizontalStepSize;
}
void OnRadiusUpdate(bool init)
{
int topLeft = Forms.ConvertToScaledPixel(Element.CornerRadius.TopLeft);
int topRight = Forms.ConvertToScaledPixel(Element.CornerRadius.TopRight);
int bottomLeft = Forms.ConvertToScaledPixel(Element.CornerRadius.BottomLeft);
int bottomRight = Forms.ConvertToScaledPixel(Element.CornerRadius.BottomRight);
Control.SetRadius(topLeft, topRight, bottomLeft, bottomRight);
if (!init)
{
Control.Draw();
}
}
static SKPath MakePath(EllipseGeometry ellipseGeometry)
{
var path = new SKPath();
path.AddOval(new SKRect(
Forms.ConvertToScaledPixel(ellipseGeometry.Center.X - ellipseGeometry.RadiusX),
Forms.ConvertToScaledPixel(ellipseGeometry.Center.Y - ellipseGeometry.RadiusY),
Forms.ConvertToScaledPixel(ellipseGeometry.Center.X + ellipseGeometry.RadiusX),
Forms.ConvertToScaledPixel(ellipseGeometry.Center.Y + ellipseGeometry.RadiusY)),
SKPathDirection.Clockwise);
return(path);
}
static SKPath MakePath(LineGeometry lineGeometry)
{
var path = new SKPath();
path.MoveTo(
Forms.ConvertToScaledPixel(lineGeometry.StartPoint.X),
Forms.ConvertToScaledPixel(lineGeometry.StartPoint.Y));
path.LineTo(
Forms.ConvertToScaledPixel(lineGeometry.EndPoint.X),
Forms.ConvertToScaledPixel(lineGeometry.EndPoint.Y));
return(path);
}
static SKPath MakePath(RectangleGeometry rectangleGeometry)
{
var path = new SKPath();
FormsRectangle rect = rectangleGeometry.Rect;
path.AddRect(new SKRect(
Forms.ConvertToScaledPixel(rect.Left),
Forms.ConvertToScaledPixel(rect.Top),
Forms.ConvertToScaledPixel(rect.Right),
Forms.ConvertToScaledPixel(rect.Bottom)),
SKPathDirection.Clockwise);
return(path);
}
void OnLayout()
{
var outter = Control.Geometry;
var width = outter.Width - Forms.ConvertToScaledPixel(Element.Padding.HorizontalThickness);
var height = outter.Height - Forms.ConvertToScaledPixel(Element.Padding.VerticalThickness);
var left = outter.Left + Forms.ConvertToScaledPixel(Element.Padding.Left);
var top = outter.Top + Forms.ConvertToScaledPixel(Element.Padding.Top);
var imageBound = new Rect(left, top, width, height);
_image.Geometry = imageBound;
_button.Geometry = outter;
_round.Draw(outter);
_border.Draw(outter);
}
void UpdateContentSize()
{
_scrollCanvas.MinimumWidth = Forms.ConvertToScaledPixel(Element.ContentSize.Width + Element.Padding.HorizontalThickness);
_scrollCanvas.MinimumHeight = Forms.ConvertToScaledPixel(Element.ContentSize.Height + Element.Padding.VerticalThickness);
// elm-scroller updates the CurrentRegion after render
Device.BeginInvokeOnMainThread(() =>
{
if (Control != null)
{
OnScrolled(Control, EventArgs.Empty);
}
});
}
void UpdateBorderWidth(bool init)
{
if (Element.BorderWidth > 0)
{
_border.BorderWidth = Forms.ConvertToScaledPixel(Element.BorderWidth);
}
else
{
_border.BorderWidth = 0;
}
if (!init)
{
_border.Draw();
}
}
protected override EvasObject OnReusableContent(Cell cell, string part, EvasObject old)
{
if (!_cacheCandidate.ContainsKey(old))
{
return(null);
}
var layout = _cacheCandidate[old];
layout.BindingContext = cell;
int height = Forms.ConvertToScaledPixel(cell.RenderHeight);
height = height > 0 ? height : Forms.ConvertToPixel(s_defaultHeight);
old.MinimumHeight = height;
return(old);
}
void UpdateRadius(bool init)
{
if (Element.CornerRadius > 0)
{
_round.SetRadius(Forms.ConvertToScaledPixel(Element.CornerRadius));
_border.SetRadius(Forms.ConvertToScaledPixel(Element.CornerRadius));
}
else
{
_round.SetRadius(0);
_border.SetRadius(0);
}
if (!init)
{
_round.Draw();
_border.Draw();
}
}
void UpdateContentSize()
{
if (_content == null)
{
return;
}
_content.MinimumWidth = Forms.ConvertToScaledPixel(Element.ContentSize.Width);
_content.MinimumHeight = Forms.ConvertToScaledPixel(Element.ContentSize.Height);
// elm-scroller updates the CurrentRegion after render
Device.BeginInvokeOnMainThread(() =>
{
if (Control != null)
{
OnScrolled(Control, EventArgs.Empty);
}
});
}
public static ICollectionViewLayoutManager ToLayoutManager(this IItemsLayout layout, ItemSizingStrategy sizing = ItemSizingStrategy.MeasureFirstItem)
{
switch (layout)
{
case LinearItemsLayout listItemsLayout:
return(new LinearLayoutManager(listItemsLayout.Orientation == ItemsLayoutOrientation.Horizontal, sizing, Forms.ConvertToScaledPixel(listItemsLayout.ItemSpacing)));
case GridItemsLayout gridItemsLayout:
return(new GridLayoutManager(gridItemsLayout.Orientation == ItemsLayoutOrientation.Horizontal,
gridItemsLayout.Span,
sizing,
Forms.ConvertToScaledPixel(gridItemsLayout.VerticalItemSpacing),
Forms.ConvertToScaledPixel(gridItemsLayout.HorizontalItemSpacing)));
default:
break;
}
return(new LinearLayoutManager(false));
}
void InitializeFlyout()
{
((IShellController)Element).StructureChanged += OnShellStructureChanged;
View flyoutHeader = ((IShellController)Element).FlyoutHeader;
if (flyoutHeader != null)
{
var headerView = Platform.GetOrCreateRenderer(flyoutHeader);
(headerView as LayoutRenderer)?.RegisterOnLayoutUpdated();
Size request = flyoutHeader.Measure(Forms.ConvertToScaledDP(_native.NavigationView.MinimumWidth), Forms.ConvertToScaledDP(_native.NavigationView.MinimumHeight)).Request;
headerView.NativeView.MinimumHeight = Forms.ConvertToScaledPixel(request.Height);
_native.NavigationView.Header = headerView.NativeView;
}
BuildMenu();
_native.NavigationView.MenuItemSelected += OnItemSelected;
}
EvasObject GetContent(object data, string part)
{
ShellSection section = data as ShellSection;
var box = new Native.Box(Forms.NativeParent);
box.Show();
var icon = new Native.Image(Forms.NativeParent)
{
MinimumWidth = Forms.ConvertToScaledPixel(44),
MinimumHeight = Forms.ConvertToScaledPixel(27)
};
var task = icon.LoadFromImageSourceAsync(section.Icon);
icon.Show();
var title = new Native.Label(Forms.NativeParent)
{
Text = section.Title,
FontSize = Forms.ConvertToEflFontPoint(14),
HorizontalTextAlignment = Native.TextAlignment.Start,
VerticalTextAlignment = Native.TextAlignment.Center
};
title.Show();
box.PackEnd(icon);
box.PackEnd(title);
box.LayoutUpdated += (object sender, LayoutEventArgs e) =>
{
icon.Move(e.Geometry.X + _iconPadding, e.Geometry.Y + _iconPadding);
icon.Resize(_iconSize, _iconSize);
title.Move(e.Geometry.X + 2 * _iconPadding + _iconSize, e.Geometry.Y);
title.Resize(e.Geometry.Width - (2 * _iconPadding + _iconSize), e.Geometry.Height);
};
box.MinimumHeight = _cellHeight;
return(box);
}
EvasObject CreateReusableContent(ViewCell viewCell)
{
var listView = viewCell.RealParent as ListView;
ViewCell duplicatedCell = (ViewCell)listView.ItemTemplate.CreateContent();
duplicatedCell.BindingContext = viewCell.BindingContext;
duplicatedCell.Parent = listView;
var renderer = Platform.GetOrCreateRenderer(duplicatedCell.View);
double height = duplicatedCell.RenderHeight;
height = height > 0 ? height : FindCellContentHeight(duplicatedCell);
renderer.NativeView.MinimumHeight = Forms.ConvertToScaledPixel(height);
_cacheCandidate[renderer.NativeView] = duplicatedCell;
renderer.NativeView.Deleted += (sender, e) =>
{
_cacheCandidate.Remove((EvasObject)sender);
};
(renderer as LayoutRenderer)?.RegisterOnLayoutUpdated();
return(renderer.NativeView);
}
public static ESize ToPixel(this Size size)
{
return(new ESize(Forms.ConvertToScaledPixel(size.Width), Forms.ConvertToScaledPixel(size.Height)));
}
public static int GetDefaultHeightPixel(this ImageCellRenderer imageCell)
{
return(Forms.ConvertToScaledPixel(ThemeConstants.ImageCell.Resources.DefaultHeight));
}
void OnPromptRequested(Page sender, PromptArguments args)
{
// Verify that the page making the request is child of this platform
if (!_platform.PageIsChildOfPlatform(sender))
{
return;
}
var prompt = Native.Dialog.CreateDialog(Forms.NativeParent, (args.Accept != null));
prompt.Title = args.Title;
var entry = new Entry
{
MinimumWidthRequest = 200,
HorizontalOptions = LayoutOptions.FillAndExpand,
BackgroundColor = Color.FromRgb(250, 250, 250),
TextColor = Color.Black,
Keyboard = args.Keyboard,
};
if (!string.IsNullOrEmpty(args.Placeholder))
{
entry.Placeholder = args.Placeholder;
}
if (args.MaxLength > 0)
{
entry.MaxLength = args.MaxLength;
}
var layout = new StackLayout
{
Spacing = 10,
Children =
{
new Label
{
LineBreakMode = LineBreakMode.CharacterWrap,
TextColor = Device.Idiom == TargetIdiom.Watch ? Color.White : Color.Accent,
Text = args.Message,
HorizontalOptions = LayoutOptions.FillAndExpand,
HorizontalTextAlignment = TextAlignment.Center,
FontSize = Device.GetNamedSize(NamedSize.Subtitle, typeof(Label)),
},
entry,
}
};
layout.Parent = sender;
var layoutrenderer = Platform.GetOrCreateRenderer(layout);
var request = layout.Measure(Device.Idiom == TargetIdiom.Watch ? sender.Width * 0.7 : sender.Width, sender.Height);
(layoutrenderer as LayoutRenderer).RegisterOnLayoutUpdated();
layoutrenderer.NativeView.MinimumHeight = Forms.ConvertToScaledPixel(request.Request.Height);
layoutrenderer.NativeView.MinimumWidth = Forms.ConvertToScaledPixel(request.Request.Width);
prompt.Content = layoutrenderer.NativeView;
var cancel = new EButton(prompt)
{
Text = args.Cancel
};
prompt.NegativeButton = cancel;
cancel.Clicked += (s, evt) =>
{
args.SetResult(null);
prompt.Dismiss();
};
if (args.Accept != null)
{
var ok = new EButton(prompt)
{
Text = args.Accept
};
prompt.NeutralButton = ok;
ok.Clicked += (s, evt) =>
{
args.SetResult(entry.Text);
prompt.Dismiss();
};
}
entry.Completed += (s, e) =>
{
args.SetResult(entry.Text);
prompt.Dismiss();
};
prompt.BackButtonPressed += (s, evt) =>
{
prompt.Dismiss();
};
prompt.Show();
_alerts.Add(prompt);
prompt.Dismissed += (s, e) => _alerts.Remove(prompt);
}
void UpdateItems()
{
CurrentItems = GetSwipedItems();
var itemsLayout = new StackLayout
{
Spacing = 0,
Orientation = IsHorizontalSwipe ? StackOrientation.Horizontal : StackOrientation.Vertical,
FlowDirection = SwipeDirection == SwipeDirection.Left ? FlowDirection.RightToLeft : FlowDirection.LeftToRight
};
foreach (var item in CurrentItems)
{
View itemView = null;
if (item is SwipeItem switem)
{
itemView = CreateItemView(switem, !IsHorizontalSwipe);
}
else if (item is SwipeItemView customItem)
{
itemView = CreateItemView(customItem);
}
else
{
continue;
}
var tap = new TapGestureRecognizer();
tap.Command = item.Command;
tap.CommandParameter = item.CommandParameter;
tap.Tapped += (s, e) =>
{
if (item is SwipeItem swipeItem)
{
swipeItem.OnInvoked();
}
if (item is SwipeItemView customSwipeItem)
{
customSwipeItem.OnInvoked();
}
if (CurrentItems.SwipeBehaviorOnInvoked != SwipeBehaviorOnInvoked.RemainOpen)
{
Device.BeginInvokeOnMainThread(() =>
{
_ = SwipeCloseAsync();
});
}
};
itemView.GestureRecognizers.Add(tap);
if (IsHorizontalSwipe)
{
itemView.HorizontalOptions = LayoutOptions.Start;
itemView.VerticalOptions = LayoutOptions.FillAndExpand;
}
else
{
itemView.VerticalOptions = LayoutOptions.Start;
itemView.HorizontalOptions = LayoutOptions.FillAndExpand;
}
itemsLayout.Children.Add(itemView);
}
var itemsRenderer = Platform.GetOrCreateRenderer(itemsLayout);
(itemsRenderer as LayoutRenderer)?.RegisterOnLayoutUpdated();
var measured = itemsLayout.Measure(Element.Width, Element.Height);
MaximumSwipeSize = Forms.ConvertToScaledPixel(
IsHorizontalSwipe ?
Math.Min(measured.Request.Width, Element.Width) :
Math.Min(measured.Request.Height, Element.Height));
Control.Children.Add(itemsRenderer.NativeView);
var itemsGeometry = NativeView.Geometry;
if (SwipeDirection == SwipeDirection.Up)
{
itemsGeometry.Y += (itemsGeometry.Height - MaximumSwipeSize);
}
itemsRenderer.NativeView.Geometry = itemsGeometry;
itemsRenderer.NativeView.StackBelow(Platform.GetRenderer(SwipeView.Content).NativeView);
_itemsRenderer = itemsRenderer;
}