public void UpdateMarkerLayout()
{
var view = Element;
var _context = Context;
var headlessOffset = CompressedLayout.GetHeadlessOffset(view);
var x = (int)_context.ToPixels(view.X + headlessOffset.X);
var y = (int)_context.ToPixels(view.Y + headlessOffset.Y);
var size = view.Measure(double.PositiveInfinity, double.PositiveInfinity, MeasureFlags.IncludeMargins);
var width = Math.Max(0, (int)_context.ToPixels(size.Request.Width));
var height = Math.Max(0, (int)_context.ToPixels(size.Request.Height));
Measure(MeasureSpec.MakeMeasureSpec(width, Android.Views.MeasureSpecMode.Unspecified), MeasureSpec.MakeMeasureSpec(height, Android.Views.MeasureSpecMode.Unspecified));
Layout(x, y, x + width, y + height);
}
public void UpdateLayout()
{
Performance.Start(out string reference);
VisualElement view = _renderer.Element;
AView aview = _renderer.View;
var headlessOffset = CompressedLayout.GetHeadlessOffset(view);
var x = (int)_context.ToPixels(view.X + headlessOffset.X);
var y = (int)_context.ToPixels(view.Y + headlessOffset.Y);
var width = Math.Max(0, (int)_context.ToPixels(view.Width));
var height = Math.Max(0, (int)_context.ToPixels(view.Height));
if (aview is FormsViewGroup formsViewGroup)
{
Performance.Start(reference, "MeasureAndLayout");
formsViewGroup.MeasureAndLayout(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.Exactly), x, y, x + width, y + height);
Performance.Stop(reference, "MeasureAndLayout");
}
else if (aview is LayoutViewGroup && width == 0 && height == 0)
{
// Nothing to do here; just chill.
}
else
{
Performance.Start(reference, "Measure");
aview.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.Exactly));
Performance.Stop(reference, "Measure");
Performance.Start(reference, "Layout");
aview.Layout(x, y, x + width, y + height);
Performance.Stop(reference, "Layout");
}
// If we're running sufficiently new Android, we have to make sure to update the ClipBounds to
// match the new size of the ViewGroup
if ((int)Forms.SdkInt >= 18)
{
UpdateClipToBounds();
}
UpdateClip();
Performance.Stop(reference);
//On Width or Height changes, the anchors needs to be updated
UpdateAnchorX();
UpdateAnchorY();
}
public void UpdateLayout()
{
var reference = Guid.NewGuid().ToString();
Performance.Start(reference);
VisualElement view = _renderer.Element;
AView aview = _renderer.View;
var headlessOffset = CompressedLayout.GetHeadlessOffset(view);
var x = (int)_context.ToPixels(view.X + headlessOffset.X);
var y = (int)_context.ToPixels(view.Y + headlessOffset.Y);
var width = Math.Max(0, (int)_context.ToPixels(view.Width));
var height = Math.Max(0, (int)_context.ToPixels(view.Height));
var formsViewGroup = aview as FormsViewGroup;
if (formsViewGroup == null)
{
Performance.Start(reference, "Measure");
aview.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.Exactly));
Performance.Stop(reference, "Measure");
Performance.Start(reference, "Layout");
aview.Layout(x, y, x + width, y + height);
Performance.Stop(reference, "Layout");
}
else
{
Performance.Start(reference, "MeasureAndLayout");
formsViewGroup.MeasureAndLayout(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.Exactly), x, y, x + width, y + height);
Performance.Stop(reference, "MeasureAndLayout");
}
// If we're running sufficiently new Android, we have to make sure to update the ClipBounds to
// match the new size of the ViewGroup
if ((int)Build.VERSION.SdkInt >= 18)
{
UpdateClipToBounds();
}
Performance.Stop(reference);
//On Width or Height changes, the anchors needs to be updated
UpdateAnchorX();
UpdateAnchorY();
}
public void UpdateLayout()
{
var reference = Guid.NewGuid().ToString();
Performance.Start(reference);
VisualElement view = _renderer.Element;
AView aview = _renderer.View;
var headlessOffset = CompressedLayout.GetHeadlessOffset(view);
var x = (int)_context.ToPixels(view.X + headlessOffset.X);
var y = (int)_context.ToPixels(view.Y + headlessOffset.Y);
var width = Math.Max(0, (int)_context.ToPixels(view.Width));
var height = Math.Max(0, (int)_context.ToPixels(view.Height));
var formsViewGroup = aview as FormsViewGroup;
if (formsViewGroup == null)
{
Performance.Start(reference, "Measure");
aview.Measure(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.Exactly));
Performance.Stop(reference, "Measure");
Performance.Start(reference, "Layout");
aview.Layout(x, y, x + width, y + height);
Performance.Stop(reference, "Layout");
}
else
{
Performance.Start(reference, "MeasureAndLayout");
formsViewGroup.MeasureAndLayout(MeasureSpecFactory.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpecFactory.MakeMeasureSpec(height, MeasureSpecMode.Exactly), x, y, x + width, y + height);
Performance.Stop(reference, "MeasureAndLayout");
}
Performance.Stop(reference);
//On Width or Height changes, the anchors needs to be updated
UpdateAnchorX();
UpdateAnchorY();
}
void OnUpdateNativeControl(CALayer caLayer)
{
var view = Renderer.Element;
var uiview = Renderer.NativeView;
if (view == null || view.Batched)
{
return;
}
bool shouldInteract;
if (view is Layout layout)
{
if (layout.InputTransparent)
{
shouldInteract = !layout.CascadeInputTransparent;
}
else
{
shouldInteract = layout.IsEnabled;
}
}
else
{
shouldInteract = !view.InputTransparent && view.IsEnabled;
}
if (_isInteractive != shouldInteract)
{
#if __MOBILE__
uiview.UserInteractionEnabled = shouldInteract;
#endif
_isInteractive = shouldInteract;
}
var boundsChanged = _lastBounds != view.Bounds && TrackFrame;
#if !__MOBILE__
var viewParent = view.RealParent as VisualElement;
var parentBoundsChanged = _lastParentBounds != (viewParent == null ? Rectangle.Zero : viewParent.Bounds);
#else
var thread = !boundsChanged && !caLayer.Frame.IsEmpty && Application.Current?.OnThisPlatform()?.GetHandleControlUpdatesOnMainThread() == false;
#endif
var anchorX = (float)view.AnchorX;
var anchorY = (float)view.AnchorY;
var translationX = (float)view.TranslationX;
var translationY = (float)view.TranslationY;
var rotationX = (float)view.RotationX;
var rotationY = (float)view.RotationY;
var rotation = (float)view.Rotation;
var scale = (float)view.Scale;
var scaleX = (float)view.ScaleX * scale;
var scaleY = (float)view.ScaleY * scale;
var width = (float)view.Width;
var height = (float)view.Height;
var x = (float)view.X + (float)CompressedLayout.GetHeadlessOffset(view).X;
var y = (float)view.Y + (float)CompressedLayout.GetHeadlessOffset(view).Y;
var opacity = (float)view.Opacity;
var isVisible = view.IsVisible;
var updateTarget = Interlocked.Increment(ref _updateCount);
void update()
{
if (updateTarget != _updateCount)
{
return;
}
#if __MOBILE__
var visualElement = view;
#endif
var parent = view.RealParent;
var shouldRelayoutSublayers = false;
if (isVisible && caLayer.Hidden)
{
#if !__MOBILE__
uiview.Hidden = false;
#endif
caLayer.Hidden = false;
if (!caLayer.Frame.IsEmpty)
{
shouldRelayoutSublayers = true;
}
}
if (!isVisible && !caLayer.Hidden)
{
#if !__MOBILE__
uiview.Hidden = true;
#endif
caLayer.Hidden = true;
shouldRelayoutSublayers = true;
}
// ripe for optimization
var transform = CATransform3D.Identity;
#if __MOBILE__
bool shouldUpdate = (!(visualElement is Page) || visualElement is ContentPage) && width > 0 && height > 0 && parent != null && boundsChanged;
#else
// We don't care if it's a page or not since bounds of the window can change
// TODO: Find why it doesn't work to check if the parentsBounds changed and remove true;
parentBoundsChanged = true;
bool shouldUpdate = width > 0 && height > 0 && parent != null && (boundsChanged || parentBoundsChanged);
#endif
// Dont ever attempt to actually change the layout of a Page unless it is a ContentPage
// iOS is a really big fan of you not actually modifying the View's of the UIViewControllers
if (shouldUpdate && TrackFrame)
{
#if __MOBILE__
var target = new RectangleF(x, y, width, height);
#else
var visualParent = parent as VisualElement;
float newY = visualParent == null ? y : Math.Max(0, (float)(visualParent.Height - y - view.Height));
var target = new RectangleF(x, newY, width, height);
#endif
// must reset transform prior to setting frame...
caLayer.Transform = transform;
uiview.Frame = target;
if (shouldRelayoutSublayers)
{
caLayer.LayoutSublayers();
}
}
else if (width <= 0 || height <= 0)
{
//TODO: FInd why it doesn't work
#if __MOBILE__
caLayer.Hidden = true;
#endif
return;
}
#if __MOBILE__
caLayer.AnchorPoint = new PointF(anchorX, anchorY);
#else
caLayer.AnchorPoint = new PointF(anchorX - 0.5f, anchorY - 0.5f);
#endif
caLayer.Opacity = opacity;
const double epsilon = 0.001;
// position is relative to anchor point
if (Math.Abs(anchorX - .5) > epsilon)
{
transform = transform.Translate((anchorX - .5f) * width, 0, 0);
}
if (Math.Abs(anchorY - .5) > epsilon)
{
transform = transform.Translate(0, (anchorY - .5f) * height, 0);
}
if (Math.Abs(translationX) > epsilon || Math.Abs(translationY) > epsilon)
{
transform = transform.Translate(translationX, translationY, 0);
}
if (Math.Abs(scaleX - 1) > epsilon || Math.Abs(scaleY - 1) > epsilon)
{
transform = transform.Scale(scaleX, scaleY, scale);
}
// not just an optimization, iOS will not "pixel align" a view which has m34 set
if (Math.Abs(rotationY % 180) > epsilon || Math.Abs(rotationX % 180) > epsilon)
{
transform.m34 = 1.0f / -400f;
}
if (Math.Abs(rotationX % 360) > epsilon)
{
transform = transform.Rotate(rotationX * (float)Math.PI / 180.0f, 1.0f, 0.0f, 0.0f);
}
if (Math.Abs(rotationY % 360) > epsilon)
{
transform = transform.Rotate(rotationY * (float)Math.PI / 180.0f, 0.0f, 1.0f, 0.0f);
}
transform = transform.Rotate(rotation * (float)Math.PI / 180.0f, 0.0f, 0.0f, 1.0f);
if (Foundation.NSThread.IsMain)
{
caLayer.Transform = transform;
return;
}
CoreFoundation.DispatchQueue.MainQueue.DispatchAsync(() =>
{
caLayer.Transform = transform;
});
}
#if __MOBILE__
if (thread)
{
CADisplayLinkTicker.Default.Invoke(update);
}
else
{
update();
}
#else
update();
#endif
_lastBounds = view.Bounds;
#if !__MOBILE__
_lastParentBounds = viewParent?.Bounds ?? Rectangle.Zero;
#endif
}