public override ESize MeasureItem(int index, int widthConstraint, int heightConstraint)
{
if (_dataBindedViewTable.TryGetValue(this[index], out View createdView) && createdView != null)
{
return(createdView.Measure(Forms.ConvertToScaledDP(widthConstraint), Forms.ConvertToScaledDP(heightConstraint), MeasureFlags.IncludeMargins).Request.ToPixel());
}
View view = null;
if (ItemTemplate is DataTemplateSelector selector)
{
view = selector.SelectTemplate(this[index], _itemsView).CreateContent() as View;
}
else
{
view = ItemTemplate.CreateContent() as View;
}
using (var renderer = Platform.GetOrCreateRenderer(view))
{
view.Parent = _itemsView;
if (Count > index)
{
view.BindingContext = this[index];
}
var request = view.Measure(Forms.ConvertToScaledDP(widthConstraint), Forms.ConvertToScaledDP(heightConstraint), MeasureFlags.IncludeMargins).Request;
return(request.ToPixel());
}
}
protected override void OnCompleted(View sender, object data)
{
if (Recognizer is SwipeGestureRecognizer swipeGesture)
{
var lineData = (GestureLayer.LineData)data;
(swipeGesture as ISwipeGestureController)?.SendSwipe(sender, Forms.ConvertToScaledDP(lineData.X2 - lineData.X1), Forms.ConvertToScaledDP(lineData.Y2 - lineData.Y1));
(swipeGesture as ISwipeGestureController)?.DetectSwipe(sender, swipeGesture.Direction);
}
}
public override ESize MeasureItem(int widthConstraint, int heightConstraint)
{
var view = (View)ItemTemplate.CreateContent();
if (Count > 0)
{
((view as StackLayout).Children[0] as XLabel).Text = this[0].ToString();
}
var renderer = Platform.GetOrCreateRenderer(view);
var request = view.Measure(Forms.ConvertToScaledDP(widthConstraint), Forms.ConvertToScaledDP(heightConstraint), MeasureFlags.IncludeMargins).Request;
renderer.Dispose();
return(request.ToPixel());
}
public override ESize MeasureItem(int widthConstraint, int heightConstraint)
{
var view = ItemTemplate.CreateContent() as View;
var renderer = Platform.GetOrCreateRenderer(view);
view.Parent = _itemsView;
if (Count > 0)
{
view.BindingContext = this[0];
}
var request = view.Measure(Forms.ConvertToScaledDP(widthConstraint), Forms.ConvertToScaledDP(heightConstraint), MeasureFlags.IncludeMargins).Request;
renderer.Dispose();
return(request.ToPixel());
}
static double ComputeAbsoluteY(VisualElement e)
{
var parentY = 0.0;
if (e.RealParent is VisualElement ve)
{
if (CompressedLayout.GetIsHeadless(e.RealParent))
{
parentY = ComputeAbsoluteY(ve);
}
else
{
parentY = Forms.ConvertToScaledDP(Platform.GetRenderer(e.RealParent).GetNativeContentGeometry().Y);
}
}
return(e.Y + parentY);
}
void UpdatPageLayout(object sender, LayoutEventArgs e)
{
double dHeight = _titleView.Measure(Forms.ConvertToScaledDP(e.Geometry.Width), Forms.ConvertToScaledDP(e.Geometry.Height)).Request.Height;
int height = 0;
if (_hasNavigationBar)
{
height = Forms.ConvertToScaledPixel(dHeight);
}
var renderer = Platform.GetOrCreateRenderer(_titleView);
renderer.NativeView.Move(e.Geometry.X, e.Geometry.Y);
renderer.NativeView.Resize(e.Geometry.Width, height);
_page.Move(e.Geometry.X, e.Geometry.Y + height);
_page.Resize(e.Geometry.Width, e.Geometry.Height - height);
}
static double ComputeAbsoluteY(VisualElement e)
{
var parentY = 0.0;
if (e.RealParent is VisualElement parent)
{
if (CompressedLayout.GetIsHeadless(e.RealParent))
{
parentY = ComputeAbsoluteY(parent);
}
else
{
if (parent.Handler is IPlatformViewHandler nativeHandler)
{
parentY = nativeHandler.GetPlatformContentGeometry().Y.ToScaledDP();
}
else
{
parentY = Forms.ConvertToScaledDP(Platform.GetRenderer(e.RealParent).GetNativeContentGeometry().Y);
}
}
}
return(e.Y + parentY);
}
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 : this.GetDefaultHeightPixel();
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.Fill,
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 XStackLayout()
{
Orientation = StackOrientation.Horizontal,
Children =
{
label,
entry
}
};
layout.Parent = cell;
layout.BindingContext = entryCell;
layout.MinimumHeightRequest = Forms.ConvertToScaledDP(pixelHeight);
var renderer = Platform.GetOrCreateRenderer(layout);
(renderer as ILayoutRenderer)?.RegisterOnLayoutUpdated();
var nativeEntry = Platform.GetRenderer(entry)?.NativeView ?? null;
if (nativeEntry != null)
{
nativeEntry.PropagateEvents = false;
}
var nativeView = renderer.NativeView;
nativeView.MinimumHeight = pixelHeight;
_cacheCandidate[nativeView] = layout;
nativeView.Deleted += (sender, e) =>
{
_cacheCandidate.Remove(sender as EvasObject);
};
return(nativeView);
}
return(null);
}
public static Size ToDP(this ESize size)
{
return(new Size(Forms.ConvertToScaledDP(size.Width), Forms.ConvertToScaledDP(size.Height)));
}
public static Rectangle ToDP(this ERect rect)
{
return(new Rectangle(Forms.ConvertToScaledDP(rect.X), Forms.ConvertToScaledDP(rect.Y), Forms.ConvertToScaledDP(rect.Width), Forms.ConvertToScaledDP(rect.Height)));
}
void OnMoved(GestureLayer.MomentumData moment)
{
if (SwipeDirection == 0)
{
var direction = SwipeDirectionHelper.GetSwipeDirection(new Graphics.Point(moment.X1, moment.Y1), new Graphics.Point(moment.X2, moment.Y2));
if (HasRightItems && direction == SwipeDirection.Left)
{
SwipeDirection = SwipeDirection.Left;
}
else if (HasLeftItems && direction == SwipeDirection.Right)
{
SwipeDirection = SwipeDirection.Right;
}
else if (HasTopItems && direction == SwipeDirection.Down)
{
SwipeDirection = SwipeDirection.Down;
}
else if (HasBottomItems && direction == SwipeDirection.Up)
{
SwipeDirection = SwipeDirection.Up;
}
else
{
return;
}
UpdateItems();
((ISwipeViewController)Element).SendSwipeStarted(new SwipeStartedEventArgs(SwipeDirection));
}
var offset = GetSwipeOffset(moment);
if (IsNegativeDirection)
{
if (offset > 0)
{
offset = 0;
}
}
else
{
if (offset < 0)
{
offset = 0;
}
}
if (Math.Abs(offset) > MaximumSwipeSize)
{
offset = MaximumSwipeSize * (offset < 0 ? -1 : 1);
}
var toDragBound = NativeView.Geometry;
if (IsHorizontalSwipe)
{
toDragBound.X += offset;
}
else
{
toDragBound.Y += offset;
}
Platform.GetRenderer(SwipeView.Content).NativeView.Geometry = toDragBound;
((ISwipeViewController)Element).SendSwipeChanging(new SwipeChangingEventArgs(SwipeDirection, Forms.ConvertToScaledDP(offset)));
}
public override ESize MeasureFooter(int widthConstraint, int heightConstraint)
{
return(_footerCache?.Measure(Forms.ConvertToScaledDP(widthConstraint), Forms.ConvertToScaledDP(heightConstraint)).Request.ToPixel() ?? new ESize(0, 0));
}
private void OnMouseMove(object sender, EvasMouseEventArgs e)
{
Element?.OnTouchMove(new Point(Forms.ConvertToScaledDP(e.Point.X), Forms.ConvertToScaledDP(e.Point.Y)));
}
protected override void OnMoved(View sender, object data)
{
var lineData = (GestureLayer.MomentumData)data;
(Recognizer as IPanGestureController)?.SendPan(sender, Forms.ConvertToScaledDP(lineData.X2 - lineData.X1), Forms.ConvertToScaledDP(lineData.Y2 - lineData.Y1), _currentPanGestureId);
}
