Correctly set host window's parent

src/Dock.Avalonia/Controls/HostWindow.axaml

@@ -1,6 +1,7 @@
 <ResourceDictionary xmlns="https:/avaloniaui"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
- xmlns:core="using:Dock.Model.Core">
+ xmlns:core="using:Dock.Model.Core"
+ xmlns:controls="clr-namespace:Dock.Model.Controls;assembly=Dock.Model">
  <Design.PreviewWith>
  <HostWindow IsToolWindow="False" Width="300" Height="400" />
  </Design.PreviewWith>
@@ -14,6 +15,7 @@
  <Setter Property="WindowState" Value="Normal" />
  <Setter Property="UseLayoutRounding" Value="True" />
  <Setter Property="Title" Value="{Binding ActiveDockable.Title}" />
+ <Setter Property="Topmost" Value="{Binding Window.Topmost}" x:DataType="controls:IRootDock" />
  <Setter Property="SystemDecorations" Value="Full" />
  <Setter Property="ExtendClientAreaToDecorationsHint" Value="True" />
  <Setter Property="ExtendClientAreaChromeHints" Value="PreferSystemChrome" />

src/Dock.Avalonia/Controls/HostWindow.axaml.cs

@@ -1,11 +1,13 @@
 using System;
+using System.Linq;
 using System.Runtime.InteropServices;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Metadata;
 using Avalonia.Controls.Primitives;
 using Avalonia.Input;
 using Avalonia.Styling;
+using Avalonia.VisualTree;
 using Dock.Avalonia.Internal;
 using Dock.Model;
 using Dock.Model.Core;
@@ -276,7 +278,15 @@ public void Present(bool isDialog)
  Window.Factory?.OnWindowOpened(Window);
  }
 
- Show();
+ var ownerDockControl = Window?.Layout?.Factory?.DockControls.FirstOrDefault();
+ if (ownerDockControl is Control control && control.GetVisualRoot() is Window parentWindow)
+ {
+ Show(parentWindow);
+ }
+ else
+ {
+ Show();
+ }
  }
  }
  }
@@ -334,12 +344,6 @@ public void GetSize(out double width, out double height)
  height = Height;
  }
 
- /// <inheritdoc/>
- public void SetTopmost(bool topmost)
- {
- Topmost = topmost;
- }
-
  /// <inheritdoc/>
  public void SetTitle(string title)
  {

src/Dock.Model/Adapters/HostAdapter.cs

@@ -56,7 +56,6 @@ public void Present(bool isDialog)
  _window.Host.Present(isDialog);
  _window.Host.SetPosition(_window.X, _window.Y);
  _window.Host.SetSize(_window.Width, _window.Height);
- _window.Host.SetTopmost(_window.Topmost);
  _window.Host.SetTitle(_window.Title);
  _window.Host.SetLayout(_window.Layout);
  _window.Host.IsTracked = true;

src/Dock.Model/Core/IHostWindow.cs

@@ -64,12 +64,6 @@ public interface IHostWindow
  /// <param name="height">The host height.</param>
  void GetSize(out double width, out double height);
 
- /// <summary>
- /// Sets host topmost.
- /// </summary>
- /// <param name="topmost">The host topmost.</param>
- void SetTopmost(bool topmost);
-
  /// <summary>
  /// Sets host title.
  /// </summary>

src/Dock.Model/FactoryBase.cs

@@ -255,7 +255,6 @@ public virtual void SplitToDock(IDock dock, IDockable dockable, DockOperation op
  public virtual IDockWindow? CreateWindowFrom(IDockable dockable)
  {
  IDockable? target;
- bool topmost;
 
  switch (dockable)
  {
@@ -273,7 +272,6 @@ public virtual void SplitToDock(IDock dock, IDockable dockable, DockOperation op
  dock.ActiveDockable = dockable;
  }
  }
- topmost = true;
  break;
  }
  case IDocument:
@@ -305,37 +303,31 @@ public virtual void SplitToDock(IDock dock, IDockable dockable, DockOperation op
  dock.ActiveDockable = dockable;
  }
  }
- topmost = false;
  break;
  }
  case IToolDock:
  {
  target = dockable;
- topmost = true;
  break;
  }
  case IDocumentDock:
  {
  target = dockable;
- topmost = false;
  break;
  }
  case IProportionalDock proportionalDock:
  {
  target = proportionalDock;
- topmost = false;
  break;
  }
  case IDockDock dockDock:
  {
  target = dockDock;
- topmost = false;
  break;
  }
  case IRootDock rootDock:
  {
  target = rootDock.ActiveDockable;
- topmost = false;
  break;
  }
  default:
@@ -361,7 +353,6 @@ public virtual void SplitToDock(IDock dock, IDockable dockable, DockOperation op
  window.Title = "";
  window.Width = double.NaN;
  window.Height = double.NaN;
- window.Topmost = topmost;
  window.Layout = root;
 
  root.Window = window;