diff --git a/.ncrunch/NativeEmbedSample.v3.ncrunchproject b/.ncrunch/NativeEmbedSample.v3.ncrunchproject
new file mode 100644
index 0000000000..319cd523ce
--- /dev/null
+++ b/.ncrunch/NativeEmbedSample.v3.ncrunchproject
@@ -0,0 +1,5 @@
+
+
+ True
+
+
\ No newline at end of file
diff --git a/nukebuild/Numerge b/nukebuild/Numerge
index 4464343aef..aef10ae67d 160000
--- a/nukebuild/Numerge
+++ b/nukebuild/Numerge
@@ -1 +1 @@
-Subproject commit 4464343aef5c8ab7a42fcb20a483a6058199f8b8
+Subproject commit aef10ae67dc55c95f49b52a505a0be33bfa297a5
diff --git a/packages/Avalonia/Avalonia.csproj b/packages/Avalonia/Avalonia.csproj
index 2c5a09bee7..cd3ce9adcd 100644
--- a/packages/Avalonia/Avalonia.csproj
+++ b/packages/Avalonia/Avalonia.csproj
@@ -41,6 +41,10 @@
true
build\
+
+ true
+ build\
+
diff --git a/packages/Avalonia/AvaloniaBuildTasks.props b/packages/Avalonia/AvaloniaBuildTasks.props
index 30bafa37ee..deea3aa391 100644
--- a/packages/Avalonia/AvaloniaBuildTasks.props
+++ b/packages/Avalonia/AvaloniaBuildTasks.props
@@ -1,3 +1,11 @@
-
+
+
+
+
+
+
+
+
+
diff --git a/packages/Avalonia/AvaloniaBuildTasks.targets b/packages/Avalonia/AvaloniaBuildTasks.targets
index 537495fcad..84a62bb5c0 100644
--- a/packages/Avalonia/AvaloniaBuildTasks.targets
+++ b/packages/Avalonia/AvaloniaBuildTasks.targets
@@ -4,6 +4,20 @@
<_AvaloniaUseExternalMSBuild Condition="'$(_AvaloniaForceInternalMSBuild)' == 'true'">false
low
+
+
+
+
+ %(Filename)
+ Code
+
+
+ %(Filename)
+ Code
+
+
+
+
+ DependsOnTargets="$(BuildAvaloniaResourcesDependsOn)">
+
+
+
+
diff --git a/packages/Avalonia/AvaloniaItemSchema.xaml b/packages/Avalonia/AvaloniaItemSchema.xaml
new file mode 100644
index 0000000000..a51ea3c0be
--- /dev/null
+++ b/packages/Avalonia/AvaloniaItemSchema.xaml
@@ -0,0 +1,18 @@
+
+
+
+
+
+
+
+
+
+
+
diff --git a/readme.md b/readme.md
index a9263d4816..6a04c7e31e 100644
--- a/readme.md
+++ b/readme.md
@@ -68,7 +68,7 @@ Avalonia is licenced under the [MIT licence](licence.md).
## Contributors
-This project exists thanks to all the people who contribute. [[Contribute](http://avaloniaui.net/contributing/contributing)].
+This project exists thanks to all the people who contribute. [[Contribute](http://avaloniaui.net/contributing)].
### Backers
diff --git a/src/Avalonia.Base/Threading/DispatcherTimer.cs b/src/Avalonia.Base/Threading/DispatcherTimer.cs
index ebafc8b946..56cde9738e 100644
--- a/src/Avalonia.Base/Threading/DispatcherTimer.cs
+++ b/src/Avalonia.Base/Threading/DispatcherTimer.cs
@@ -14,7 +14,7 @@ namespace Avalonia.Threading
private readonly DispatcherPriority _priority;
private TimeSpan _interval;
-
+
///
/// Initializes a new instance of the class.
///
@@ -154,6 +154,8 @@ namespace Avalonia.Threading
TimeSpan interval,
DispatcherPriority priority = DispatcherPriority.Normal)
{
+ interval = (interval != TimeSpan.Zero) ? interval : TimeSpan.FromTicks(1);
+
var timer = new DispatcherTimer(priority) { Interval = interval };
timer.Tick += (s, e) =>
@@ -197,7 +199,7 @@ namespace Avalonia.Threading
}
}
-
+
///
/// Raises the event on the dispatcher thread.
diff --git a/src/Avalonia.Build.Tasks/GenerateAvaloniaResourcesTask.cs b/src/Avalonia.Build.Tasks/GenerateAvaloniaResourcesTask.cs
index 406abe6f99..ae2bf99d1e 100644
--- a/src/Avalonia.Build.Tasks/GenerateAvaloniaResourcesTask.cs
+++ b/src/Avalonia.Build.Tasks/GenerateAvaloniaResourcesTask.cs
@@ -107,7 +107,7 @@ namespace Avalonia.Build.Tasks
foreach (var s in sources.ToList())
{
- if (s.Path.ToLowerInvariant().EndsWith(".xaml") || s.Path.ToLowerInvariant().EndsWith(".paml"))
+ if (s.Path.ToLowerInvariant().EndsWith(".xaml") || s.Path.ToLowerInvariant().EndsWith(".paml") || s.Path.ToLowerInvariant().EndsWith(".axaml"))
{
XamlFileInfo info;
try
@@ -150,7 +150,7 @@ namespace Avalonia.Build.Tasks
BuildEngine.LogMessage($"GenerateAvaloniaResourcesTask -> Root: {Root}, {Resources?.Count()} resources, Output:{Output}", _reportImportance < MessageImportance.Low ? MessageImportance.High : _reportImportance);
- foreach (var r in EmbeddedResources.Where(r => r.ItemSpec.EndsWith(".xaml") || r.ItemSpec.EndsWith(".paml")))
+ foreach (var r in EmbeddedResources.Where(r => r.ItemSpec.EndsWith(".xaml") || r.ItemSpec.EndsWith(".paml") || r.ItemSpec.EndsWith(".axaml")))
BuildEngine.LogWarning(BuildEngineErrorCode.LegacyResmScheme, r.ItemSpec,
"XAML file is packed using legacy EmbeddedResource/resm scheme, relative URIs won't work");
var resources = BuildResourceSources();
diff --git a/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs b/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs
index 3b69109e68..30e8f120d7 100644
--- a/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs
+++ b/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs
@@ -25,7 +25,8 @@ namespace Avalonia.Build.Tasks
public static partial class XamlCompilerTaskExecutor
{
static bool CheckXamlName(IResource r) => r.Name.ToLowerInvariant().EndsWith(".xaml")
- || r.Name.ToLowerInvariant().EndsWith(".paml");
+ || r.Name.ToLowerInvariant().EndsWith(".paml")
+ || r.Name.ToLowerInvariant().EndsWith(".axaml");
public class CompileResult
{
diff --git a/src/Avalonia.Controls/Embedding/EmbeddableControlRoot.cs b/src/Avalonia.Controls/Embedding/EmbeddableControlRoot.cs
index 8a21d7aa4b..5ff0fd1feb 100644
--- a/src/Avalonia.Controls/Embedding/EmbeddableControlRoot.cs
+++ b/src/Avalonia.Controls/Embedding/EmbeddableControlRoot.cs
@@ -25,7 +25,7 @@ namespace Avalonia.Controls.Embedding
{
EnsureInitialized();
ApplyTemplate();
- LayoutManager.ExecuteInitialLayoutPass(this);
+ LayoutManager.ExecuteInitialLayoutPass();
}
private void EnsureInitialized()
diff --git a/src/Avalonia.Controls/Embedding/Offscreen/OffscreenTopLevel.cs b/src/Avalonia.Controls/Embedding/Offscreen/OffscreenTopLevel.cs
index d326ab5734..b037dd9901 100644
--- a/src/Avalonia.Controls/Embedding/Offscreen/OffscreenTopLevel.cs
+++ b/src/Avalonia.Controls/Embedding/Offscreen/OffscreenTopLevel.cs
@@ -18,7 +18,7 @@ namespace Avalonia.Controls.Embedding.Offscreen
{
EnsureInitialized();
ApplyTemplate();
- LayoutManager.ExecuteInitialLayoutPass(this);
+ LayoutManager.ExecuteInitialLayoutPass();
}
private void EnsureInitialized()
diff --git a/src/Avalonia.Controls/Repeater/ViewportManager.cs b/src/Avalonia.Controls/Repeater/ViewportManager.cs
index b705a518ff..0d22187b34 100644
--- a/src/Avalonia.Controls/Repeater/ViewportManager.cs
+++ b/src/Avalonia.Controls/Repeater/ViewportManager.cs
@@ -49,8 +49,8 @@ namespace Avalonia.Controls
// For non-virtualizing layouts, we do not need to keep
// updating viewports and invalidating measure often. So when
// a non virtualizing layout is used, we stop doing all that work.
- bool _managingViewportDisabled;
- private IDisposable _effectiveViewportChangedRevoker;
+ private bool _managingViewportDisabled;
+ private bool _effectiveViewportChangedSubscribed;
private bool _layoutUpdatedSubscribed;
public ViewportManager(ItemsRepeater owner)
@@ -228,11 +228,15 @@ namespace Avalonia.Controls
_pendingViewportShift = default;
_unshiftableShift = default;
- _effectiveViewportChangedRevoker?.Dispose();
-
- if (!_managingViewportDisabled)
+ if (_managingViewportDisabled && _effectiveViewportChangedSubscribed)
{
- _effectiveViewportChangedRevoker = SubscribeToEffectiveViewportChanged(_owner);
+ _owner.EffectiveViewportChanged -= OnEffectiveViewportChanged;
+ _effectiveViewportChangedSubscribed = false;
+ }
+ else if (!_managingViewportDisabled && !_effectiveViewportChangedSubscribed)
+ {
+ _owner.EffectiveViewportChanged += OnEffectiveViewportChanged;
+ _effectiveViewportChangedSubscribed = true;
}
}
@@ -340,6 +344,11 @@ namespace Avalonia.Controls
// Note that the element being brought into view could be a descendant.
var targetChild = GetImmediateChildOfRepeater((IControl)args.TargetObject);
+ if (targetChild is null)
+ {
+ return;
+ }
+
// Make sure that only the target child can be the anchor during the bring into view operation.
foreach (var child in _owner.Children)
{
@@ -373,7 +382,7 @@ namespace Avalonia.Controls
if (parent == null)
{
- throw new InvalidOperationException("OnBringIntoViewRequested called with args.target element not under the ItemsRepeater that recieved the call");
+ return null;
}
return targetChild;
@@ -415,15 +424,15 @@ namespace Avalonia.Controls
_scroller = null;
}
- _effectiveViewportChangedRevoker?.Dispose();
- _effectiveViewportChangedRevoker = null;
+ _owner.EffectiveViewportChanged -= OnEffectiveViewportChanged;
+ _effectiveViewportChangedSubscribed = false;
_ensuredScroller = false;
}
- private void OnEffectiveViewportChanged(Rect effectiveViewport)
+ private void OnEffectiveViewportChanged(object sender, EffectiveViewportChangedEventArgs e)
{
Logger.TryGet(LogEventLevel.Verbose, "Repeater")?.Log(this, "{LayoutId}: EffectiveViewportChanged event callback", _owner.Layout.LayoutId);
- UpdateViewport(effectiveViewport);
+ UpdateViewport(e.EffectiveViewport);
_pendingViewportShift = default;
_unshiftableShift = default;
@@ -468,8 +477,8 @@ namespace Avalonia.Controls
}
else if (!_managingViewportDisabled)
{
- _effectiveViewportChangedRevoker?.Dispose();
- _effectiveViewportChangedRevoker = SubscribeToEffectiveViewportChanged(_owner);
+ _owner.EffectiveViewportChanged += OnEffectiveViewportChanged;
+ _effectiveViewportChangedSubscribed = true;
}
_ensuredScroller = true;
@@ -529,38 +538,6 @@ namespace Avalonia.Controls
}
}
- private IDisposable SubscribeToEffectiveViewportChanged(IControl control)
- {
- // HACK: This is a bit of a hack. We need the effective viewport of the ItemsRepeater -
- // we can get this from TransformedBounds, but this property is updated after layout has
- // run, which is too late. Instead, for now lets just hook into an internal event on
- // ScrollContentPresenter to find out what the offset and viewport will be after arrange
- // and use those values. Note that this doesn't handle nested ScrollViewers at all, but
- // it's enough to get scrolling to non-uniformly sized items working for now.
- //
- // UWP uses the EffectiveViewportChanged event (which I think was implemented specially
- // for this case): we need to implement that in Avalonia, but the semantics of it aren't
- // clear to me. Hopefully the source for this event will be released with WinUI 3.
- if (control.VisualParent is ScrollContentPresenter scp)
- {
- scp.PreArrange += ScrollContentPresenterPreArrange;
- return Disposable.Create(() => scp.PreArrange -= ScrollContentPresenterPreArrange);
- }
-
- return Disposable.Empty;
- }
-
- private void ScrollContentPresenterPreArrange(object sender, VectorEventArgs e)
- {
- var scp = (ScrollContentPresenter)sender;
- var effectiveViewport = new Rect((Point)scp.Offset, new Size(e.Vector.X, e.Vector.Y));
-
- if (effectiveViewport != _visibleWindow)
- {
- OnEffectiveViewportChanged(effectiveViewport);
- }
- }
-
private class ScrollerInfo
{
public ScrollerInfo(ScrollViewer scroller)
diff --git a/src/Avalonia.Controls/SelectionModel.cs b/src/Avalonia.Controls/SelectionModel.cs
index ff1c0260bb..aa6552579f 100644
--- a/src/Avalonia.Controls/SelectionModel.cs
+++ b/src/Avalonia.Controls/SelectionModel.cs
@@ -189,8 +189,6 @@ namespace Avalonia.Controls
}
set
{
- var isSelected = IsSelectedWithPartialAt(value);
-
if (!IsSelectedAt(value) || SelectedItems.Count > 1)
{
using var operation = new Operation(this);
diff --git a/src/Avalonia.Controls/TopLevel.cs b/src/Avalonia.Controls/TopLevel.cs
index c5491746a3..f058942116 100644
--- a/src/Avalonia.Controls/TopLevel.cs
+++ b/src/Avalonia.Controls/TopLevel.cs
@@ -318,7 +318,7 @@ namespace Avalonia.Controls
///
/// Creates the layout manager for this .
///
- protected virtual ILayoutManager CreateLayoutManager() => new LayoutManager();
+ protected virtual ILayoutManager CreateLayoutManager() => new LayoutManager(this);
///
/// Handles a paint notification from .
@@ -340,6 +340,9 @@ namespace Avalonia.Controls
_globalStyles.GlobalStylesRemoved -= ((IStyleHost)this).StylesRemoved;
}
+ Renderer?.Dispose();
+ Renderer = null;
+
var logicalArgs = new LogicalTreeAttachmentEventArgs(this, this, null);
((ILogical)this).NotifyDetachedFromLogicalTree(logicalArgs);
@@ -349,8 +352,8 @@ namespace Avalonia.Controls
(this as IInputRoot).MouseDevice?.TopLevelClosed(this);
PlatformImpl = null;
OnClosed(EventArgs.Empty);
- Renderer?.Dispose();
- Renderer = null;
+
+ LayoutManager?.Dispose();
}
///
diff --git a/src/Avalonia.Controls/Window.cs b/src/Avalonia.Controls/Window.cs
index ff7cc41e3b..cedd20ace5 100644
--- a/src/Avalonia.Controls/Window.cs
+++ b/src/Avalonia.Controls/Window.cs
@@ -519,7 +519,7 @@ namespace Avalonia.Controls
}
}
- LayoutManager.ExecuteInitialLayoutPass(this);
+ LayoutManager.ExecuteInitialLayoutPass();
using (BeginAutoSizing())
{
@@ -592,7 +592,7 @@ namespace Avalonia.Controls
}
}
- LayoutManager.ExecuteInitialLayoutPass(this);
+ LayoutManager.ExecuteInitialLayoutPass();
var result = new TaskCompletionSource();
diff --git a/src/Avalonia.Controls/WindowBase.cs b/src/Avalonia.Controls/WindowBase.cs
index afc01db506..eb6e7319f5 100644
--- a/src/Avalonia.Controls/WindowBase.cs
+++ b/src/Avalonia.Controls/WindowBase.cs
@@ -162,7 +162,7 @@ namespace Avalonia.Controls
if (!_hasExecutedInitialLayoutPass)
{
- LayoutManager.ExecuteInitialLayoutPass(this);
+ LayoutManager.ExecuteInitialLayoutPass();
_hasExecutedInitialLayoutPass = true;
}
PlatformImpl?.Show();
diff --git a/src/Avalonia.Layout/EffectiveViewportChangedEventArgs.cs b/src/Avalonia.Layout/EffectiveViewportChangedEventArgs.cs
new file mode 100644
index 0000000000..1cdc775b13
--- /dev/null
+++ b/src/Avalonia.Layout/EffectiveViewportChangedEventArgs.cs
@@ -0,0 +1,24 @@
+using System;
+
+namespace Avalonia.Layout
+{
+ ///
+ /// Provides data for the event.
+ ///
+ public class EffectiveViewportChangedEventArgs : EventArgs
+ {
+ public EffectiveViewportChangedEventArgs(Rect effectiveViewport)
+ {
+ EffectiveViewport = effectiveViewport;
+ }
+
+ ///
+ /// Gets the representing the effective viewport.
+ ///
+ ///
+ /// The viewport is expressed in coordinates relative to the control that the event is
+ /// raised on.
+ ///
+ public Rect EffectiveViewport { get; }
+ }
+}
diff --git a/src/Avalonia.Layout/ILayoutManager.cs b/src/Avalonia.Layout/ILayoutManager.cs
index 6e63d3edbb..614670a53b 100644
--- a/src/Avalonia.Layout/ILayoutManager.cs
+++ b/src/Avalonia.Layout/ILayoutManager.cs
@@ -7,7 +7,7 @@ namespace Avalonia.Layout
///
/// Manages measuring and arranging of controls.
///
- public interface ILayoutManager
+ public interface ILayoutManager : IDisposable
{
///
/// Raised when the layout manager completes a layout pass.
@@ -35,6 +35,15 @@ namespace Avalonia.Layout
///
void ExecuteLayoutPass();
+ ///
+ /// Executes the initial layout pass on a layout root.
+ ///
+ ///
+ /// You should not usually need to call this method explictly, the layout root will call
+ /// it to carry out the initial layout of the control.
+ ///
+ void ExecuteInitialLayoutPass();
+
///
/// Executes the initial layout pass on a layout root.
///
@@ -43,6 +52,19 @@ namespace Avalonia.Layout
/// You should not usually need to call this method explictly, the layout root will call
/// it to carry out the initial layout of the control.
///
+ [Obsolete("Call ExecuteInitialLayoutPass without parameter")]
void ExecuteInitialLayoutPass(ILayoutRoot root);
+
+ ///
+ /// Registers a control as wanting to receive effective viewport notifications.
+ ///
+ /// The control.
+ void RegisterEffectiveViewportListener(ILayoutable control);
+
+ ///
+ /// Registers a control as no longer wanting to receive effective viewport notifications.
+ ///
+ /// The control.
+ void UnregisterEffectiveViewportListener(ILayoutable control);
}
}
diff --git a/src/Avalonia.Layout/ILayoutable.cs b/src/Avalonia.Layout/ILayoutable.cs
index 316a017f1d..54d3ba6a11 100644
--- a/src/Avalonia.Layout/ILayoutable.cs
+++ b/src/Avalonia.Layout/ILayoutable.cs
@@ -111,5 +111,12 @@ namespace Avalonia.Layout
///
/// The child control.
void ChildDesiredSizeChanged(ILayoutable control);
+
+ ///
+ /// Used by the to notify the control that its effective
+ /// viewport is changed.
+ ///
+ /// The viewport information.
+ void EffectiveViewportChanged(EffectiveViewportChangedEventArgs e);
}
}
diff --git a/src/Avalonia.Layout/LayoutManager.cs b/src/Avalonia.Layout/LayoutManager.cs
index aefb319fd0..792de774d1 100644
--- a/src/Avalonia.Layout/LayoutManager.cs
+++ b/src/Avalonia.Layout/LayoutManager.cs
@@ -1,7 +1,10 @@
using System;
+using System.Buffers;
+using System.Collections.Generic;
using System.Diagnostics;
using Avalonia.Logging;
using Avalonia.Threading;
+using Avalonia.VisualTree;
#nullable enable
@@ -10,16 +13,21 @@ namespace Avalonia.Layout
///
/// Manages measuring and arranging of controls.
///
- public class LayoutManager : ILayoutManager
+ public class LayoutManager : ILayoutManager, IDisposable
{
+ private const int MaxPasses = 3;
+ private readonly ILayoutRoot _owner;
private readonly LayoutQueue _toMeasure = new LayoutQueue(v => !v.IsMeasureValid);
private readonly LayoutQueue _toArrange = new LayoutQueue(v => !v.IsArrangeValid);
private readonly Action _executeLayoutPass;
+ private List? _effectiveViewportChangedListeners;
+ private bool _disposed;
private bool _queued;
private bool _running;
- public LayoutManager()
+ public LayoutManager(ILayoutRoot owner)
{
+ _owner = owner ?? throw new ArgumentNullException(nameof(owner));
_executeLayoutPass = ExecuteLayoutPass;
}
@@ -31,6 +39,11 @@ namespace Avalonia.Layout
control = control ?? throw new ArgumentNullException(nameof(control));
Dispatcher.UIThread.VerifyAccess();
+ if (_disposed)
+ {
+ return;
+ }
+
if (!control.IsAttachedToVisualTree)
{
#if DEBUG
@@ -41,6 +54,11 @@ namespace Avalonia.Layout
#endif
}
+ if (control.VisualRoot != _owner)
+ {
+ throw new ArgumentException("Attempt to call InvalidateMeasure on wrong LayoutManager.");
+ }
+
_toMeasure.Enqueue(control);
_toArrange.Enqueue(control);
QueueLayoutPass();
@@ -52,6 +70,11 @@ namespace Avalonia.Layout
control = control ?? throw new ArgumentNullException(nameof(control));
Dispatcher.UIThread.VerifyAccess();
+ if (_disposed)
+ {
+ return;
+ }
+
if (!control.IsAttachedToVisualTree)
{
#if DEBUG
@@ -62,6 +85,11 @@ namespace Avalonia.Layout
#endif
}
+ if (control.VisualRoot != _owner)
+ {
+ throw new ArgumentException("Attempt to call InvalidateArrange on wrong LayoutManager.");
+ }
+
_toArrange.Enqueue(control);
QueueLayoutPass();
}
@@ -69,10 +97,13 @@ namespace Avalonia.Layout
///
public virtual void ExecuteLayoutPass()
{
- const int MaxPasses = 3;
-
Dispatcher.UIThread.VerifyAccess();
+ if (_disposed)
+ {
+ return;
+ }
+
if (!_running)
{
_running = true;
@@ -97,23 +128,15 @@ namespace Avalonia.Layout
_toMeasure.BeginLoop(MaxPasses);
_toArrange.BeginLoop(MaxPasses);
- try
+ for (var pass = 0; pass < MaxPasses; ++pass)
{
- for (var pass = 0; pass < MaxPasses; ++pass)
- {
- ExecuteMeasurePass();
- ExecuteArrangePass();
+ InnerLayoutPass();
- if (_toMeasure.Count == 0)
- {
- break;
- }
+ if (!RaiseEffectiveViewportChanged())
+ {
+ break;
}
}
- finally
- {
- _running = false;
- }
_toMeasure.EndLoop();
_toArrange.EndLoop();
@@ -131,13 +154,18 @@ namespace Avalonia.Layout
}
///
- public virtual void ExecuteInitialLayoutPass(ILayoutRoot root)
+ public virtual void ExecuteInitialLayoutPass()
{
+ if (_disposed)
+ {
+ return;
+ }
+
try
{
_running = true;
- Measure(root);
- Arrange(root);
+ Measure(_owner);
+ Arrange(_owner);
}
finally
{
@@ -151,6 +179,67 @@ namespace Avalonia.Layout
ExecuteLayoutPass();
}
+ [Obsolete("Call ExecuteInitialLayoutPass without parameter")]
+ public void ExecuteInitialLayoutPass(ILayoutRoot root)
+ {
+ if (root != _owner)
+ {
+ throw new ArgumentException("ExecuteInitialLayoutPass called with incorrect root.");
+ }
+
+ ExecuteInitialLayoutPass();
+ }
+
+ public void Dispose()
+ {
+ _disposed = true;
+ _toMeasure.Dispose();
+ _toArrange.Dispose();
+ }
+
+ void ILayoutManager.RegisterEffectiveViewportListener(ILayoutable control)
+ {
+ _effectiveViewportChangedListeners ??= new List();
+ _effectiveViewportChangedListeners.Add(new EffectiveViewportChangedListener(
+ control,
+ CalculateEffectiveViewport(control)));
+ }
+
+ void ILayoutManager.UnregisterEffectiveViewportListener(ILayoutable control)
+ {
+ if (_effectiveViewportChangedListeners is object)
+ {
+ for (var i = _effectiveViewportChangedListeners.Count - 1; i >= 0; --i)
+ {
+ if (_effectiveViewportChangedListeners[i].Listener == control)
+ {
+ _effectiveViewportChangedListeners.RemoveAt(i);
+ }
+ }
+ }
+ }
+
+ private void InnerLayoutPass()
+ {
+ try
+ {
+ for (var pass = 0; pass < MaxPasses; ++pass)
+ {
+ ExecuteMeasurePass();
+ ExecuteArrangePass();
+
+ if (_toMeasure.Count == 0)
+ {
+ break;
+ }
+ }
+ }
+ finally
+ {
+ _running = false;
+ }
+ }
+
private void ExecuteMeasurePass()
{
while (_toMeasure.Count > 0)
@@ -234,5 +323,97 @@ namespace Avalonia.Layout
_queued = true;
}
}
+
+ private bool RaiseEffectiveViewportChanged()
+ {
+ var startCount = _toMeasure.Count + _toArrange.Count;
+
+ if (_effectiveViewportChangedListeners is object)
+ {
+ var count = _effectiveViewportChangedListeners.Count;
+ var pool = ArrayPool.Shared;
+ var listeners = pool.Rent(count);
+
+ _effectiveViewportChangedListeners.CopyTo(listeners);
+
+ try
+ {
+ for (var i = 0; i < count; ++i)
+ {
+ var l = _effectiveViewportChangedListeners[i];
+
+ if (!l.Listener.IsAttachedToVisualTree)
+ {
+ continue;
+ }
+
+ var viewport = CalculateEffectiveViewport(l.Listener);
+
+ if (viewport != l.Viewport)
+ {
+ l.Listener.EffectiveViewportChanged(new EffectiveViewportChangedEventArgs(viewport));
+ _effectiveViewportChangedListeners[i] = new EffectiveViewportChangedListener(l.Listener, viewport);
+ }
+ }
+ }
+ finally
+ {
+ pool.Return(listeners, clearArray: true);
+ }
+ }
+
+ return startCount != _toMeasure.Count + _toMeasure.Count;
+ }
+
+ private Rect CalculateEffectiveViewport(IVisual control)
+ {
+ var viewport = new Rect(0, 0, double.PositiveInfinity, double.PositiveInfinity);
+ CalculateEffectiveViewport(control, control, ref viewport);
+ return viewport;
+ }
+
+ private void CalculateEffectiveViewport(IVisual target, IVisual control, ref Rect viewport)
+ {
+ // Recurse until the top level control.
+ if (control.VisualParent is object)
+ {
+ CalculateEffectiveViewport(target, control.VisualParent, ref viewport);
+ }
+ else
+ {
+ viewport = new Rect(control.Bounds.Size);
+ }
+
+ // Apply the control clip bounds if it's not the target control. We don't apply it to
+ // the target control because it may itself be clipped to bounds and if so the viewport
+ // we calculate would be of no use.
+ if (control != target && control.ClipToBounds)
+ {
+ viewport = control.Bounds.Intersect(viewport);
+ }
+
+ // Translate the viewport into this control's coordinate space.
+ viewport = viewport.Translate(-control.Bounds.Position);
+
+ if (control != target && control.RenderTransform is object)
+ {
+ var origin = control.RenderTransformOrigin.ToPixels(control.Bounds.Size);
+ var offset = Matrix.CreateTranslation(origin);
+ var renderTransform = (-offset) * control.RenderTransform.Value.Invert() * (offset);
+ viewport = viewport.TransformToAABB(renderTransform);
+ }
+ }
+
+ private readonly struct EffectiveViewportChangedListener
+ {
+ public EffectiveViewportChangedListener(ILayoutable listener, Rect viewport)
+ {
+ Listener = listener;
+ Viewport = viewport;
+ }
+
+ public ILayoutable Listener { get; }
+ public Rect Viewport { get; }
+ }
}
}
diff --git a/src/Avalonia.Layout/LayoutQueue.cs b/src/Avalonia.Layout/LayoutQueue.cs
index e261a1b48e..1a9eb6b785 100644
--- a/src/Avalonia.Layout/LayoutQueue.cs
+++ b/src/Avalonia.Layout/LayoutQueue.cs
@@ -4,7 +4,7 @@ using System.Collections.Generic;
namespace Avalonia.Layout
{
- internal class LayoutQueue : IReadOnlyCollection
+ internal class LayoutQueue : IReadOnlyCollection, IDisposable
{
private struct Info
{
@@ -84,5 +84,12 @@ namespace Avalonia.Layout
_notFinalizedBuffer.Clear();
}
+
+ public void Dispose()
+ {
+ _inner.Clear();
+ _loopQueueInfo.Clear();
+ _notFinalizedBuffer.Clear();
+ }
}
}
diff --git a/src/Avalonia.Layout/Layoutable.cs b/src/Avalonia.Layout/Layoutable.cs
index 8d2a825fa0..e62e22f8ec 100644
--- a/src/Avalonia.Layout/Layoutable.cs
+++ b/src/Avalonia.Layout/Layoutable.cs
@@ -132,6 +132,7 @@ namespace Avalonia.Layout
private bool _measuring;
private Size? _previousMeasure;
private Rect? _previousArrange;
+ private EventHandler? _effectiveViewportChanged;
private EventHandler? _layoutUpdated;
///
@@ -152,6 +153,32 @@ namespace Avalonia.Layout
VerticalAlignmentProperty);
}
+ ///
+ /// Occurs when the element's effective viewport changes.
+ ///
+ public event EventHandler? EffectiveViewportChanged
+ {
+ add
+ {
+ if (_effectiveViewportChanged is null && VisualRoot is ILayoutRoot r)
+ {
+ r.LayoutManager.RegisterEffectiveViewportListener(this);
+ }
+
+ _effectiveViewportChanged += value;
+ }
+
+ remove
+ {
+ _effectiveViewportChanged -= value;
+
+ if (_effectiveViewportChanged is null && VisualRoot is ILayoutRoot r)
+ {
+ r.LayoutManager.UnregisterEffectiveViewportListener(this);
+ }
+ }
+ }
+
///
/// Occurs when a layout pass completes for the control.
///
@@ -384,13 +411,6 @@ namespace Avalonia.Layout
}
}
- ///
- /// Called by InvalidateMeasure
- ///
- protected virtual void OnMeasureInvalidated()
- {
- }
-
///
/// Invalidates the measurement of the control and queues a new layout pass.
///
@@ -436,6 +456,11 @@ namespace Avalonia.Layout
}
}
+ void ILayoutable.EffectiveViewportChanged(EffectiveViewportChangedEventArgs e)
+ {
+ _effectiveViewportChanged?.Invoke(this, e);
+ }
+
///
/// Marks a property as affecting the control's measurement.
///
@@ -717,9 +742,17 @@ namespace Avalonia.Layout
{
base.OnAttachedToVisualTreeCore(e);
- if (_layoutUpdated is object && e.Root is ILayoutRoot r)
+ if (e.Root is ILayoutRoot r)
{
- r.LayoutManager.LayoutUpdated += LayoutManagedLayoutUpdated;
+ if (_layoutUpdated is object)
+ {
+ r.LayoutManager.LayoutUpdated += LayoutManagedLayoutUpdated;
+ }
+
+ if (_effectiveViewportChanged is object)
+ {
+ r.LayoutManager.RegisterEffectiveViewportListener(this);
+ }
}
}
@@ -727,12 +760,27 @@ namespace Avalonia.Layout
{
base.OnDetachedFromVisualTreeCore(e);
- if (_layoutUpdated is object && e.Root is ILayoutRoot r)
+ if (e.Root is ILayoutRoot r)
{
- r.LayoutManager.LayoutUpdated -= LayoutManagedLayoutUpdated;
+ if (_layoutUpdated is object)
+ {
+ r.LayoutManager.LayoutUpdated -= LayoutManagedLayoutUpdated;
+ }
+
+ if (_effectiveViewportChanged is object)
+ {
+ r.LayoutManager.UnregisterEffectiveViewportListener(this);
+ }
}
}
+ ///
+ /// Called by InvalidateMeasure
+ ///
+ protected virtual void OnMeasureInvalidated()
+ {
+ }
+
///
protected sealed override void OnVisualParentChanged(IVisual oldParent, IVisual newParent)
{
diff --git a/src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj b/src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj
index a4eab83e4a..84bf799d8d 100644
--- a/src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj
+++ b/src/Avalonia.Themes.Fluent/Avalonia.Themes.Fluent.csproj
@@ -14,6 +14,7 @@
+
diff --git a/src/Avalonia.Themes.Fluent/DensityStyles/Compact.xaml b/src/Avalonia.Themes.Fluent/DensityStyles/Compact.xaml
new file mode 100644
index 0000000000..f0f3e5ea16
--- /dev/null
+++ b/src/Avalonia.Themes.Fluent/DensityStyles/Compact.xaml
@@ -0,0 +1,23 @@
+
+
+
+
diff --git a/src/Avalonia.Visuals/Animation/Animators/SolidColorBrushAnimator.cs b/src/Avalonia.Visuals/Animation/Animators/SolidColorBrushAnimator.cs
index 8776d3a7b7..a8e618af27 100644
--- a/src/Avalonia.Visuals/Animation/Animators/SolidColorBrushAnimator.cs
+++ b/src/Avalonia.Visuals/Animation/Animators/SolidColorBrushAnimator.cs
@@ -1,6 +1,5 @@
using System;
using System.Reactive.Disposables;
-using Avalonia.Logging;
using Avalonia.Media;
using Avalonia.Media.Immutable;
@@ -11,9 +10,9 @@ namespace Avalonia.Animation.Animators
///
public class SolidColorBrushAnimator : Animator
{
- ColorAnimator _colorAnimator;
+ private ColorAnimator _colorAnimator;
- void InitializeColorAnimator()
+ private void InitializeColorAnimator()
{
_colorAnimator = new ColorAnimator();
@@ -27,46 +26,44 @@ namespace Avalonia.Animation.Animators
public override IDisposable Apply(Animation animation, Animatable control, IClock clock, IObservable match, Action onComplete)
{
+ // Preprocess keyframe values to Color if the xaml parser converts them to ISCB.
foreach (var keyframe in this)
{
- if (keyframe.Value as ISolidColorBrush == null)
- return Disposable.Empty;
-
- // Preprocess keyframe values to Color if the xaml parser converts them to ISCB.
- if (keyframe.Value.GetType() == typeof(ImmutableSolidColorBrush))
+ if (keyframe.Value is ISolidColorBrush colorBrush)
{
- keyframe.Value = ((ImmutableSolidColorBrush)keyframe.Value).Color;
+ keyframe.Value = colorBrush.Color;
+ }
+ else
+ {
+ return Disposable.Empty;
}
}
- // Add SCB if the target prop is empty.
- if (control.GetValue(Property) == null)
- control.SetValue(Property, new SolidColorBrush(Colors.Transparent));
-
+ SolidColorBrush finalTarget;
var targetVal = control.GetValue(Property);
-
- // Continue if target prop is not empty & is a SolidColorBrush derivative.
- if (typeof(ISolidColorBrush).IsAssignableFrom(targetVal.GetType()))
+ if (targetVal is null)
+ {
+ finalTarget = new SolidColorBrush(Colors.Transparent);
+ control.SetValue(Property, finalTarget);
+ }
+ else if (targetVal is ImmutableSolidColorBrush immutableSolidColorBrush)
+ {
+ finalTarget = new SolidColorBrush(immutableSolidColorBrush.Color);
+ control.SetValue(Property, finalTarget);
+ }
+ else if (targetVal is ISolidColorBrush)
{
- if (_colorAnimator == null)
- InitializeColorAnimator();
-
- SolidColorBrush finalTarget;
-
- // If it's ISCB, change it back to SCB.
- if (targetVal.GetType() == typeof(ImmutableSolidColorBrush))
- {
- var col = (ImmutableSolidColorBrush)targetVal;
- targetVal = new SolidColorBrush(col.Color);
- control.SetValue(Property, targetVal);
- }
-
finalTarget = targetVal as SolidColorBrush;
-
- return _colorAnimator.Apply(animation, finalTarget, clock ?? control.Clock, match, onComplete);
}
+ else
+ {
+ return Disposable.Empty;
+ }
+
+ if (_colorAnimator == null)
+ InitializeColorAnimator();
- return Disposable.Empty;
+ return _colorAnimator.Apply(animation, finalTarget, clock ?? control.Clock, match, onComplete);
}
public override SolidColorBrush Interpolate(double p, SolidColorBrush o, SolidColorBrush n) => null;
diff --git a/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs b/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
index 5da44c5943..872f69c884 100644
--- a/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
+++ b/src/Avalonia.Visuals/Rendering/SceneGraph/SceneBuilder.cs
@@ -394,13 +394,8 @@ namespace Avalonia.Rendering.SceneGraph
}
}
- private static bool ShouldStartLayer(IVisual visual)
- {
- var o = visual as IAvaloniaObject;
- return visual.VisualChildren.Count > 0 &&
- o != null &&
- o.IsAnimating(Visual.OpacityProperty);
- }
+ // HACK: Disabled layers because they're broken in current renderer. See #2244.
+ private static bool ShouldStartLayer(IVisual visual) => false;
private static IGeometryImpl CreateLayerGeometryClip(VisualNode node)
{
diff --git a/src/Avalonia.X11/XI2Manager.cs b/src/Avalonia.X11/XI2Manager.cs
index 4e44f55fe0..742973e0da 100644
--- a/src/Avalonia.X11/XI2Manager.cs
+++ b/src/Avalonia.X11/XI2Manager.cs
@@ -239,13 +239,13 @@ namespace Avalonia.X11
if (ev.Type == XiEventType.XI_ButtonPress && ev.Button >= 4 && ev.Button <= 7 && !ev.Emulated)
{
- Vector? scrollDelta = ev.Button switch
+ var scrollDelta = ev.Button switch
{
4 => new Vector(0, 1),
5 => new Vector(0, -1),
6 => new Vector(1, 0),
7 => new Vector(-1, 0),
- _ => null
+ _ => (Vector?)null
};
if (scrollDelta.HasValue)
diff --git a/src/Windows/Avalonia.Win32/WindowsMountedVolumeInfoListener.cs b/src/Windows/Avalonia.Win32/WindowsMountedVolumeInfoListener.cs
index db4c916052..ba1bfda949 100644
--- a/src/Windows/Avalonia.Win32/WindowsMountedVolumeInfoListener.cs
+++ b/src/Windows/Avalonia.Win32/WindowsMountedVolumeInfoListener.cs
@@ -5,12 +5,13 @@ using System.Linq;
using System.Reactive.Disposables;
using System.Reactive.Linq;
using Avalonia.Controls.Platform;
+using Avalonia.Logging;
namespace Avalonia.Win32
{
internal class WindowsMountedVolumeInfoListener : IDisposable
{
- private readonly CompositeDisposable _disposables;
+ private readonly CompositeDisposable _disposables;
private bool _beenDisposed = false;
private ObservableCollection mountedDrives;
@@ -32,10 +33,22 @@ namespace Avalonia.Win32
var allDrives = DriveInfo.GetDrives();
var mountVolInfos = allDrives
- .Where(p => p.IsReady)
+ .Where(p =>
+ {
+ try
+ {
+ var ret = p.IsReady;
+ return ret;
+ }
+ catch (Exception e)
+ {
+ Logger.TryGet(LogEventLevel.Warning, LogArea.Control)?.Log(this, $"Error in Windows drive enumeration: {e.Message}");
+ }
+ return false;
+ })
.Select(p => new MountedVolumeInfo()
{
- VolumeLabel = string.IsNullOrEmpty(p.VolumeLabel.Trim()) ? p.RootDirectory.FullName
+ VolumeLabel = string.IsNullOrEmpty(p.VolumeLabel.Trim()) ? p.RootDirectory.FullName
: $"{p.VolumeLabel} ({p.Name})",
VolumePath = p.RootDirectory.FullName,
VolumeSizeBytes = (ulong)p.TotalSize
diff --git a/tests/Avalonia.Benchmarks/Layout/ControlsBenchmark.cs b/tests/Avalonia.Benchmarks/Layout/ControlsBenchmark.cs
index de40c247e6..7170f6d7d4 100644
--- a/tests/Avalonia.Benchmarks/Layout/ControlsBenchmark.cs
+++ b/tests/Avalonia.Benchmarks/Layout/ControlsBenchmark.cs
@@ -24,7 +24,7 @@ namespace Avalonia.Benchmarks.Layout
Renderer = new NullRenderer()
};
- _root.LayoutManager.ExecuteInitialLayoutPass(_root);
+ _root.LayoutManager.ExecuteInitialLayoutPass();
}
[Benchmark]
diff --git a/tests/Avalonia.Benchmarks/Layout/Measure.cs b/tests/Avalonia.Benchmarks/Layout/Measure.cs
index d03d17b4d3..fce2cddec9 100644
--- a/tests/Avalonia.Benchmarks/Layout/Measure.cs
+++ b/tests/Avalonia.Benchmarks/Layout/Measure.cs
@@ -25,7 +25,7 @@ namespace Avalonia.Benchmarks.Layout
_controls.Add(panel);
_controls = ControlHierarchyCreator.CreateChildren(_controls, panel, 3, 5, 5);
- _root.LayoutManager.ExecuteInitialLayoutPass(_root);
+ _root.LayoutManager.ExecuteInitialLayoutPass();
}
[Benchmark, MethodImpl(MethodImplOptions.NoInlining)]
diff --git a/tests/Avalonia.Benchmarks/Traversal/VisualTreeTraversal.cs b/tests/Avalonia.Benchmarks/Traversal/VisualTreeTraversal.cs
index fc2380d670..c6da3a941f 100644
--- a/tests/Avalonia.Benchmarks/Traversal/VisualTreeTraversal.cs
+++ b/tests/Avalonia.Benchmarks/Traversal/VisualTreeTraversal.cs
@@ -26,7 +26,7 @@ namespace Avalonia.Benchmarks.Traversal
_shuffledControls = _controls.OrderBy(r => random.Next()).ToList();
- _root.LayoutManager.ExecuteInitialLayoutPass(_root);
+ _root.LayoutManager.ExecuteInitialLayoutPass();
}
[Benchmark]
diff --git a/tests/Avalonia.Controls.UnitTests/GridTests.cs b/tests/Avalonia.Controls.UnitTests/GridTests.cs
index b3882c534b..4ffa526b85 100644
--- a/tests/Avalonia.Controls.UnitTests/GridTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/GridTests.cs
@@ -1194,7 +1194,7 @@ namespace Avalonia.Controls.UnitTests
Height = 50,
};
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
PrintColumnDefinitions(grids[0]);
Assert.Equal(5, grids[0].ColumnDefinitions[0].ActualWidth);
diff --git a/tests/Avalonia.Controls.UnitTests/ListBoxTests.cs b/tests/Avalonia.Controls.UnitTests/ListBoxTests.cs
index a7679ba388..c4346e571b 100644
--- a/tests/Avalonia.Controls.UnitTests/ListBoxTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/ListBoxTests.cs
@@ -329,7 +329,7 @@ namespace Avalonia.Controls.UnitTests
return tb;
}, true);
- lm.ExecuteInitialLayoutPass(wnd);
+ lm.ExecuteInitialLayoutPass();
target.Items = items;
diff --git a/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization.cs b/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization.cs
index 9caae89cfe..d529cc4f75 100644
--- a/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization.cs
+++ b/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization.cs
@@ -232,7 +232,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
var scroll = (TestScroller)target.Parent;
scroll.Width = scroll.Height = 100;
- scroll.LayoutManager.ExecuteInitialLayoutPass(scroll);
+ scroll.LayoutManager.ExecuteInitialLayoutPass();
// Ensure than an intermediate measure pass doesn't add more controls than it
// should. This can happen if target gets measured with Size.Infinity which
@@ -324,6 +324,11 @@ namespace Avalonia.Controls.UnitTests.Presenters
private class TestScroller : ScrollContentPresenter, IRenderRoot, ILayoutRoot
{
+ public TestScroller()
+ {
+ LayoutManager = new LayoutManager(this);
+ }
+
public IRenderer Renderer { get; }
public Size ClientSize { get; }
public double RenderScaling => 1;
@@ -332,7 +337,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
public double LayoutScaling => 1;
- public ILayoutManager LayoutManager { get; } = new LayoutManager();
+ public ILayoutManager LayoutManager { get; }
public IRenderTarget CreateRenderTarget() => throw new NotImplementedException();
public void Invalidate(Rect rect) => throw new NotImplementedException();
diff --git a/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization_Simple.cs b/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization_Simple.cs
index 5a2cb60a56..a467c6dd03 100644
--- a/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization_Simple.cs
+++ b/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization_Simple.cs
@@ -723,7 +723,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
var scroller = (TestScroller)target.Parent;
scroller.Width = scroller.Height = 100;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
var last = (target.Items as IList)[10];
@@ -740,7 +740,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
var scroller = (TestScroller)target.Parent;
scroller.Width = scroller.Height = 100;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
var last = (target.Items as IList)[10];
@@ -838,7 +838,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
var scroller = (TestScroller)target.Parent;
scroller.Width = scroller.Height = 100;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
var from = target.Panel.Children[5];
var result = ((ILogicalScrollable)target).GetControlInDirection(
@@ -855,7 +855,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
var scroller = (TestScroller)target.Parent;
scroller.Width = scroller.Height = 100;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
var from = target.Panel.Children[9];
var result = ((ILogicalScrollable)target).GetControlInDirection(
@@ -874,7 +874,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
scroller.Width = 100;
scroller.Height = 95;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
var from = target.Panel.Children[8];
var result = ((ILogicalScrollable)target).GetControlInDirection(
@@ -893,7 +893,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
scroller.Width = 100;
scroller.Height = 95;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
((ILogicalScrollable)target).Offset = new Vector(0, 11);
var from = target.Panel.Children[1];
@@ -946,7 +946,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
var scroller = (TestScroller)target.Parent;
scroller.Width = scroller.Height = 100;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
var from = target.Panel.Children[5];
var result = ((ILogicalScrollable)target).GetControlInDirection(
@@ -963,7 +963,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
var scroller = (TestScroller)target.Parent;
scroller.Width = scroller.Height = 100;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
var from = target.Panel.Children[9];
var result = ((ILogicalScrollable)target).GetControlInDirection(
@@ -982,7 +982,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
scroller.Width = 95;
scroller.Height = 100;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
var from = target.Panel.Children[8];
var result = ((ILogicalScrollable)target).GetControlInDirection(
@@ -1001,7 +1001,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
scroller.Width = 95;
scroller.Height = 100;
- scroller.LayoutManager.ExecuteInitialLayoutPass(scroller);
+ scroller.LayoutManager.ExecuteInitialLayoutPass();
((ILogicalScrollable)target).Offset = new Vector(11, 0);
var from = target.Panel.Children[1];
@@ -1062,6 +1062,11 @@ namespace Avalonia.Controls.UnitTests.Presenters
private class TestScroller : ScrollContentPresenter, IRenderRoot, ILayoutRoot, ILogicalRoot
{
+ public TestScroller()
+ {
+ LayoutManager = new LayoutManager(this);
+ }
+
public IRenderer Renderer { get; }
public Size ClientSize { get; }
public double RenderScaling => 1;
@@ -1070,7 +1075,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
public double LayoutScaling => 1;
- public ILayoutManager LayoutManager { get; } = new LayoutManager();
+ public ILayoutManager LayoutManager { get; }
public IRenderTarget CreateRenderTarget() => throw new NotImplementedException();
public void Invalidate(Rect rect) => throw new NotImplementedException();
diff --git a/tests/Avalonia.Controls.UnitTests/ScrollViewerTests.cs b/tests/Avalonia.Controls.UnitTests/ScrollViewerTests.cs
index deca3cfb75..ab21c5d330 100644
--- a/tests/Avalonia.Controls.UnitTests/ScrollViewerTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/ScrollViewerTests.cs
@@ -158,7 +158,7 @@ namespace Avalonia.Controls.UnitTests
target.SetValue(ScrollViewer.ViewportProperty, new Size(50, 50));
target.Offset = new Vector(10, 10);
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
target.ScrollChanged += (s, e) =>
{
@@ -188,7 +188,7 @@ namespace Avalonia.Controls.UnitTests
target.SetValue(ScrollViewer.ViewportProperty, new Size(50, 50));
target.Offset = new Vector(10, 10);
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
target.ScrollChanged += (s, e) =>
{
@@ -218,7 +218,7 @@ namespace Avalonia.Controls.UnitTests
target.SetValue(ScrollViewer.ViewportProperty, new Size(50, 50));
target.Offset = new Vector(10, 10);
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
target.ScrollChanged += (s, e) =>
{
diff --git a/tests/Avalonia.Controls.UnitTests/TopLevelTests.cs b/tests/Avalonia.Controls.UnitTests/TopLevelTests.cs
index 6b107b0187..e49e273bec 100644
--- a/tests/Avalonia.Controls.UnitTests/TopLevelTests.cs
+++ b/tests/Avalonia.Controls.UnitTests/TopLevelTests.cs
@@ -106,7 +106,7 @@ namespace Avalonia.Controls.UnitTests
}
};
- target.LayoutManager.ExecuteInitialLayoutPass(target);
+ target.LayoutManager.ExecuteInitialLayoutPass();
Assert.Equal(new Rect(0, 0, 321, 432), target.Bounds);
}
@@ -267,6 +267,23 @@ namespace Avalonia.Controls.UnitTests
}
}
+ [Fact]
+ public void Close_Should_Dispose_LayoutManager()
+ {
+ using (UnitTestApplication.Start(TestServices.StyledWindow))
+ {
+ var impl = new Mock();
+ impl.SetupAllProperties();
+
+ var layoutManager = new Mock();
+ var target = new TestTopLevel(impl.Object, layoutManager.Object);
+
+ impl.Object.Closed();
+
+ layoutManager.Verify(x => x.Dispose());
+ }
+ }
+
[Fact]
public void Reacts_To_Changes_In_Global_Styles()
{
@@ -282,7 +299,7 @@ namespace Avalonia.Controls.UnitTests
Content = child,
};
- target.LayoutManager.ExecuteInitialLayoutPass(target);
+ target.LayoutManager.ExecuteInitialLayoutPass();
Assert.Equal(new Thickness(0), child.BorderThickness);
@@ -295,7 +312,7 @@ namespace Avalonia.Controls.UnitTests
};
Application.Current.Styles.Add(style);
- target.LayoutManager.ExecuteInitialLayoutPass(target);
+ target.LayoutManager.ExecuteInitialLayoutPass();
Assert.Equal(new Thickness(2), child.BorderThickness);
@@ -323,7 +340,7 @@ namespace Avalonia.Controls.UnitTests
public TestTopLevel(ITopLevelImpl impl, ILayoutManager layoutManager = null)
: base(impl)
{
- _layoutManager = layoutManager ?? new LayoutManager();
+ _layoutManager = layoutManager ?? new LayoutManager(this);
}
protected override ILayoutManager CreateLayoutManager() => _layoutManager;
diff --git a/tests/Avalonia.Layout.UnitTests/LayoutManagerTests.cs b/tests/Avalonia.Layout.UnitTests/LayoutManagerTests.cs
index 332e8a751d..e429adce85 100644
--- a/tests/Avalonia.Layout.UnitTests/LayoutManagerTests.cs
+++ b/tests/Avalonia.Layout.UnitTests/LayoutManagerTests.cs
@@ -13,7 +13,7 @@ namespace Avalonia.Layout.UnitTests
var control = new LayoutTestControl();
var root = new LayoutTestRoot { Child = control };
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control.Measured = control.Arranged = false;
control.InvalidateMeasure();
@@ -23,13 +23,29 @@ namespace Avalonia.Layout.UnitTests
Assert.True(control.Arranged);
}
+ [Fact]
+ public void Doesnt_Measure_And_Arrange_InvalidateMeasured_Control_When_TopLevel_Is_Not_Visible()
+ {
+ var control = new LayoutTestControl();
+ var root = new LayoutTestRoot { Child = control, IsVisible = false };
+
+ root.LayoutManager.ExecuteInitialLayoutPass();
+ control.Measured = control.Arranged = false;
+
+ control.InvalidateMeasure();
+ root.LayoutManager.ExecuteLayoutPass();
+
+ Assert.False(control.Measured);
+ Assert.False(control.Arranged);
+ }
+
[Fact]
public void Arranges_InvalidateArranged_Control()
{
var control = new LayoutTestControl();
var root = new LayoutTestRoot { Child = control };
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control.Measured = control.Arranged = false;
control.InvalidateArrange();
@@ -45,7 +61,7 @@ namespace Avalonia.Layout.UnitTests
var control = new LayoutTestControl();
var root = new LayoutTestRoot();
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
root.Child = control;
root.Measured = root.Arranged = false;
@@ -80,7 +96,7 @@ namespace Avalonia.Layout.UnitTests
root.DoMeasureOverride = MeasureOverride;
control1.DoMeasureOverride = MeasureOverride;
control2.DoMeasureOverride = MeasureOverride;
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control2.InvalidateMeasure();
control1.InvalidateMeasure();
@@ -115,7 +131,7 @@ namespace Avalonia.Layout.UnitTests
root.DoMeasureOverride = MeasureOverride;
control1.DoMeasureOverride = MeasureOverride;
control2.DoMeasureOverride = MeasureOverride;
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control2.InvalidateMeasure();
root.InvalidateMeasure();
@@ -132,7 +148,7 @@ namespace Avalonia.Layout.UnitTests
var control = new LayoutTestControl();
var root = new LayoutTestRoot { Child = control };
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
root.Measured = root.Arranged = false;
control.Measured = control.Arranged = false;
@@ -151,7 +167,7 @@ namespace Avalonia.Layout.UnitTests
var control = new LayoutTestControl();
var root = new LayoutTestRoot { Child = control };
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control.Measured = control.Arranged = false;
control.InvalidateMeasure();
@@ -177,7 +193,7 @@ namespace Avalonia.Layout.UnitTests
return new Size(100, 100);
};
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
Assert.Equal(Size.Infinity, availableSize);
}
@@ -199,7 +215,7 @@ namespace Avalonia.Layout.UnitTests
return s;
};
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
Assert.Equal(new Size(100, 100), arrangeSize);
root.Width = 120;
@@ -225,7 +241,7 @@ namespace Avalonia.Layout.UnitTests
}
};
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
Assert.Equal(new Size(0, 0), root.DesiredSize);
border.Width = 100;
@@ -241,7 +257,7 @@ namespace Avalonia.Layout.UnitTests
var control = new LayoutTestControl();
var root = new LayoutTestRoot { Child = control };
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control.Measured = false;
int cnt = 0;
@@ -272,7 +288,7 @@ namespace Avalonia.Layout.UnitTests
var control = new LayoutTestControl();
var root = new LayoutTestRoot { Child = control };
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control.Arranged = false;
int cnt = 0;
@@ -313,7 +329,7 @@ namespace Avalonia.Layout.UnitTests
panel.Children.AddRange(nonArrageableTargets);
panel.Children.AddRange(targets);
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
foreach (var c in panel.Children.OfType())
{
@@ -347,7 +363,7 @@ namespace Avalonia.Layout.UnitTests
var control = new LayoutTestControl();
var root = new LayoutTestRoot { Child = control };
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control.Measured = false;
control.DoMeasureOverride = (l, s) =>
@@ -380,7 +396,7 @@ namespace Avalonia.Layout.UnitTests
var root = new LayoutTestRoot { Child = control };
var count = 0;
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
control.Measured = false;
control.DoMeasureOverride = (l, s) =>
@@ -399,7 +415,7 @@ namespace Avalonia.Layout.UnitTests
root.InvalidateMeasure();
control.InvalidateMeasure();
- root.LayoutManager.ExecuteInitialLayoutPass(root);
+ root.LayoutManager.ExecuteInitialLayoutPass();
Assert.Equal(new Size(200, 200), control.Bounds.Size);
Assert.Equal(new Size(200, 200), control.DesiredSize);
diff --git a/tests/Avalonia.Layout.UnitTests/LayoutableTests.cs b/tests/Avalonia.Layout.UnitTests/LayoutableTests.cs
index a21c8d589d..44a5af94b9 100644
--- a/tests/Avalonia.Layout.UnitTests/LayoutableTests.cs
+++ b/tests/Avalonia.Layout.UnitTests/LayoutableTests.cs
@@ -208,14 +208,12 @@ namespace Avalonia.Layout.UnitTests
{
Border border1;
Border border2;
- var layoutManager = new LayoutManager();
var root = new TestRoot
{
Child = border1 = new Border
{
Child = border2 = new Border(),
},
- LayoutManager = layoutManager,
};
var raised = 0;
@@ -233,7 +231,7 @@ namespace Avalonia.Layout.UnitTests
root.Measure(new Size(100, 100));
root.Arrange(new Rect(0, 0, 100, 100));
- layoutManager.ExecuteLayoutPass();
+ root.LayoutManager.ExecuteLayoutPass();
Assert.Equal(3, raised);
Assert.Equal(new Rect(0, 0, 100, 100), border1.Bounds);
diff --git a/tests/Avalonia.Layout.UnitTests/LayoutableTests_EffectiveViewportChanged.cs b/tests/Avalonia.Layout.UnitTests/LayoutableTests_EffectiveViewportChanged.cs
new file mode 100644
index 0000000000..504e3fa585
--- /dev/null
+++ b/tests/Avalonia.Layout.UnitTests/LayoutableTests_EffectiveViewportChanged.cs
@@ -0,0 +1,424 @@
+using System;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Controls.Presenters;
+using Avalonia.Controls.Primitives;
+using Avalonia.Controls.Templates;
+using Avalonia.Media;
+using Avalonia.UnitTests;
+using Xunit;
+
+namespace Avalonia.Layout.UnitTests
+{
+ public class LayoutableTests_EffectiveViewportChanged
+ {
+ [Fact]
+ public async Task EffectiveViewportChanged_Not_Raised_When_Control_Added_To_Tree()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas();
+ var raised = 0;
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ ++raised;
+ };
+
+ root.Child = target;
+
+ Assert.Equal(0, raised);
+ });
+ }
+
+ [Fact]
+ public async Task EffectiveViewportChanged_Raised_Before_LayoutUpdated()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas();
+ var raised = 0;
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ ++raised;
+ };
+
+ root.Child = target;
+
+ await ExecuteInitialLayoutPass(root);
+
+ Assert.Equal(1, raised);
+ });
+ }
+
+ [Fact]
+ public async Task Parent_Affects_EffectiveViewport()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 100, Height = 100 };
+ var parent = new Border { Width = 200, Height = 200, Child = target };
+ var raised = 0;
+
+ root.Child = parent;
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ Assert.Equal(new Rect(-550, -400, 1200, 900), e.EffectiveViewport);
+ ++raised;
+ };
+
+ await ExecuteInitialLayoutPass(root);
+ });
+ }
+
+ [Fact]
+ public async Task Invalidating_In_Handler_Causes_Layout_To_Be_Rerun_Before_LayoutUpdated_Raised()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new TestCanvas();
+ var raised = 0;
+ var layoutUpdatedRaised = 0;
+
+ root.LayoutUpdated += (s, e) =>
+ {
+ Assert.Equal(2, target.MeasureCount);
+ Assert.Equal(2, target.ArrangeCount);
+ ++layoutUpdatedRaised;
+ };
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ target.InvalidateMeasure();
+ ++raised;
+ };
+
+ root.Child = target;
+
+ await ExecuteInitialLayoutPass(root);
+
+ Assert.Equal(1, raised);
+ Assert.Equal(1, layoutUpdatedRaised);
+ });
+ }
+
+ [Fact]
+ public async Task Viewport_Extends_Beyond_Centered_Control()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 52, Height = 52, };
+ var raised = 0;
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ Assert.Equal(new Rect(-574, -424, 1200, 900), e.EffectiveViewport);
+ ++raised;
+ };
+
+ root.Child = target;
+
+ await ExecuteInitialLayoutPass(root);
+ Assert.Equal(1, raised);
+ });
+ }
+
+ [Fact]
+ public async Task Viewport_Extends_Beyond_Nested_Centered_Control()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 52, Height = 52 };
+ var parent = new Border { Width = 100, Height = 100, Child = target };
+ var raised = 0;
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ Assert.Equal(new Rect(-574, -424, 1200, 900), e.EffectiveViewport);
+ ++raised;
+ };
+
+ root.Child = parent;
+
+ await ExecuteInitialLayoutPass(root);
+ Assert.Equal(1, raised);
+ });
+ }
+
+ [Fact]
+ public async Task ScrollViewer_Determines_EffectiveViewport()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 200, Height = 200 };
+ var scroller = new ScrollViewer { Width = 100, Height = 100, Content = target, Template = ScrollViewerTemplate() };
+ var raised = 0;
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ Assert.Equal(new Rect(0, 0, 100, 100), e.EffectiveViewport);
+ ++raised;
+ };
+
+ root.Child = scroller;
+
+ await ExecuteInitialLayoutPass(root);
+ Assert.Equal(1, raised);
+ });
+ }
+
+ [Fact]
+ public async Task Scrolled_ScrollViewer_Determines_EffectiveViewport()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 200, Height = 200 };
+ var scroller = new ScrollViewer { Width = 100, Height = 100, Content = target, Template = ScrollViewerTemplate() };
+ var raised = 0;
+
+ root.Child = scroller;
+
+ await ExecuteInitialLayoutPass(root);
+ scroller.Offset = new Vector(0, 10);
+
+ await ExecuteScrollerLayoutPass(root, scroller, target, (s, e) =>
+ {
+ Assert.Equal(new Rect(0, 10, 100, 100), e.EffectiveViewport);
+ ++raised;
+ });
+
+ Assert.Equal(1, raised);
+ });
+ }
+
+ [Fact]
+ public async Task Moving_Parent_Updates_EffectiveViewport()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 100, Height = 100 };
+ var parent = new Border { Width = 200, Height = 200, Child = target };
+ var raised = 0;
+
+ root.Child = parent;
+
+ await ExecuteInitialLayoutPass(root);
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ Assert.Equal(new Rect(-554, -400, 1200, 900), e.EffectiveViewport);
+ ++raised;
+ };
+
+ parent.Margin = new Thickness(8, 0, 0, 0);
+ await ExecuteLayoutPass(root);
+
+ Assert.Equal(1, raised);
+ });
+ }
+
+ [Fact]
+ public async Task Translate_Transform_Doesnt_Affect_EffectiveViewport()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 100, Height = 100 };
+ var parent = new Border { Width = 200, Height = 200, Child = target };
+ var raised = 0;
+
+ root.Child = parent;
+
+ await ExecuteInitialLayoutPass(root);
+ target.EffectiveViewportChanged += (s, e) => ++raised;
+ target.RenderTransform = new TranslateTransform { X = 8 };
+ target.InvalidateMeasure();
+ await ExecuteLayoutPass(root);
+
+ Assert.Equal(0, raised);
+ });
+ }
+
+ [Fact]
+ public async Task Translate_Transform_On_Parent_Affects_EffectiveViewport()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 100, Height = 100 };
+ var parent = new Border { Width = 200, Height = 200, Child = target };
+ var raised = 0;
+
+ root.Child = parent;
+
+ await ExecuteInitialLayoutPass(root);
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ Assert.Equal(new Rect(-558, -400, 1200, 900), e.EffectiveViewport);
+ ++raised;
+ };
+
+ // Change the parent render transform to move it. A layout is then needed before
+ // EffectiveViewportChanged is raised.
+ parent.RenderTransform = new TranslateTransform { X = 8 };
+ parent.InvalidateMeasure();
+ await ExecuteLayoutPass(root);
+
+ Assert.Equal(1, raised);
+ });
+ }
+
+ [Fact]
+ public async Task Rotate_Transform_On_Parent_Affects_EffectiveViewport()
+ {
+ await RunOnUIThread.Execute(async () =>
+ {
+ var root = CreateRoot();
+ var target = new Canvas { Width = 100, Height = 100 };
+ var parent = new Border { Width = 200, Height = 200, Child = target };
+ var raised = 0;
+
+ root.Child = parent;
+
+ await ExecuteInitialLayoutPass(root);
+
+ target.EffectiveViewportChanged += (s, e) =>
+ {
+ AssertArePixelEqual(new Rect(-651, -792, 1484, 1484), e.EffectiveViewport);
+ ++raised;
+ };
+
+ parent.RenderTransformOrigin = new RelativePoint(0, 0, RelativeUnit.Absolute);
+ parent.RenderTransform = new RotateTransform { Angle = 45 };
+ parent.InvalidateMeasure();
+ await ExecuteLayoutPass(root);
+
+ Assert.Equal(1, raised);
+ });
+ }
+
+ private TestRoot CreateRoot() => new TestRoot { Width = 1200, Height = 900 };
+
+ private Task ExecuteInitialLayoutPass(TestRoot root)
+ {
+ root.LayoutManager.ExecuteInitialLayoutPass();
+ return Task.CompletedTask;
+ }
+
+ private Task ExecuteLayoutPass(TestRoot root)
+ {
+ root.LayoutManager.ExecuteLayoutPass();
+ return Task.CompletedTask;
+ }
+
+ private Task ExecuteScrollerLayoutPass(
+ TestRoot root,
+ ScrollViewer scroller,
+ Control target,
+ Action