/// <summary>
/// Responds to DesktopWindowsXamlSource TakeFocusRequested event
/// </summary>
/// <param name="sender">DesktopWindowsXamlSource</param>
/// <param name="args">DesktopWindowXamlSourceTakeFocusRequestedEventArgs</param>
private void OnTakeFocusRequested(Windows.UI.Xaml.Hosting.DesktopWindowXamlSource sender, Windows.UI.Xaml.Hosting.DesktopWindowXamlSourceTakeFocusRequestedEventArgs args)
{
if (_lastFocusRequest == args.Request.CorrelationId)
{
// If we've arrived at this point, then focus is being move back to us
// therefore, we should complete the operation to avoid an infinite recursion
// by "Restoring" the focus back to us under a new correlationId
var newRequest = new Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationRequest(
Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.Restore);
_xamlSource.NavigateFocus(newRequest);
_lastFocusRequest = newRequest.CorrelationId;
}
else
{
// Focus was not initiated by WindowsXamlHost. Continue processing the Focus request.
var reason = args.Request.Reason;
if (reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.First || reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.Last)
{
var forward = reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.First;
_forceFocusNavigation = true;
try
{
Parent.SelectNextControl(this, forward, tabStopOnly: true, nested: false, wrap: true);
}
finally
{
_forceFocusNavigation = false;
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsXamlHostBase"/> class.
/// </summary>
public WindowsXamlHostBase()
{
SetStyle(ControlStyles.ContainerControl, true);
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
// Must be a container control with TabStop == false to allow nested UWP XAML Focus
// BUGBUG: Uncomment when nested Focus is available
// TabStop = false;
// Respond to size changes on this Control
SizeChanged += OnWindowXamlHostSizeChanged;
// Windows.UI.Xaml.Application object is required for loading custom control metadata. If a custom
// Application object is not provided by the application, the host control will create one (XamlApplication).
// Instantiation of the application object must occur before creating the DesktopWindowXamlSource instance.
// If no Application object is created before DesktopWindowXamlSource is created, DestkopWindowXamlSource
// will create a generic Application object unable to load custom UWP XAML metadata.
Microsoft.Toolkit.Win32.UI.XamlHost.XamlApplication.GetOrCreateXamlApplicationInstance(ref _application);
// Create an instance of the WindowsXamlManager. This initializes and holds a
// reference on the UWP XAML DXamlCore and must be explicitly created before
// any UWP XAML types are programmatically created. If WindowsXamlManager has
// not been created before creating DesktopWindowXamlSource, DesktopWindowXaml source
// will create an instance of WindowsXamlManager internally. (Creation is explicit
// here to illustrate how to initialize UWP XAML before initializing the DesktopWindowXamlSource.)
_windowsXamlManager = Windows.UI.Xaml.Hosting.WindowsXamlManager.InitializeForCurrentThread();
// Create DesktopWindowXamlSource, host for UWP XAML content
_xamlSource = new Windows.UI.Xaml.Hosting.DesktopWindowXamlSource();
// Hook up method for DesktopWindowXamlSource Focus handling
_xamlSource.TakeFocusRequested += this.OnTakeFocusRequested;
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsXamlHostBase"/> class.
/// </summary>
public WindowsXamlHostBase()
{
// Return immediately if control is instantiated by the Visual Studio Designer
// https://stackoverflow.com/questions/1166226/detecting-design-mode-from-a-controls-constructor
if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
{
return;
}
SetStyle(ControlStyles.ContainerControl, true);
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
// Must be a container control with TabStop == false to allow nested UWP XAML Focus
// BUGBUG: Uncomment when nested Focus is available
// TabStop = false;
// Respond to size changes on this Control
SizeChanged += OnWindowXamlHostSizeChanged;
// Create DesktopWindowXamlSource, host for UWP XAML content
_xamlSource = new WUX.Hosting.DesktopWindowXamlSource();
// Hook up method for DesktopWindowXamlSource Focus handling
_xamlSource.TakeFocusRequested += this.OnTakeFocusRequested;
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsXamlHostBase"/> class.
/// </summary>
public WindowsXamlHostBase()
{
// Return immediately if control is instantiated by the Visual Studio Designer
// https://stackoverflow.com/questions/1166226/detecting-design-mode-from-a-controls-constructor
if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
{
return;
}
SetStyle(ControlStyles.ContainerControl, true);
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
// Must be a container control with TabStop == false to allow nested UWP XAML Focus
// BUGBUG: Uncomment when nested Focus is available
// TabStop = false;
// Respond to size changes on this Control
SizeChanged += OnWindowXamlHostSizeChanged;
// Create DesktopWindowXamlSource, host for UWP XAML content
_xamlSource = new WUX.Hosting.DesktopWindowXamlSource();
// Hook up method for DesktopWindowXamlSource Focus handling
_xamlSource.TakeFocusRequested += this.OnTakeFocusRequested;
// Check if the XAML island scales the content according to the current dpi value
_xamlIslandHandlesDpiScaling = ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 8);
// Add scaling panel as the root XAML element
_xamlSource.Content = new DpiScalingPanel();
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsXamlHostBase"/> class.
/// Default constructor is required for use in WPF markup.
/// (When the default constructor is called, object properties have not been set. Put WPF logic in OnInitialized.)
/// </summary>
public WindowsXamlHostBase()
{
// Create a custom UWP XAML Application object that implements reflection-based XAML metdata probing.
// Instantiation of the application object must occur before creating the DesktopWindowXamlSource instance.
// DesktopWindowXamlSource will create a generic Application object unable to load custom UWP XAML metadata.
if (_application == null)
{
try
{
// global::Windows.UI.Xaml.Application.Current may throw if DXamlCore has not been initialized.
// Treat the exception as an uninitialized global::Windows.UI.Xaml.Application condition.
_application = Windows.UI.Xaml.Application.Current as XamlApplication;
}
catch
{
_application = new XamlApplication();
}
}
// Create an instance of the WindowsXamlManager. This initializes and holds a
// reference on the UWP XAML DXamlCore and must be explicitly created before
// any UWP XAML types are programmatically created. If WindowsXamlManager has
// not been created before creating DesktopWindowXamlSource, DesktopWindowXaml source
// will create an instance of WindowsXamlManager internally. (Creation is explicit
// here to illustrate how to initialize UWP XAML before initializing the DesktopWindowXamlSource.)
_windowsXamlManager = Windows.UI.Xaml.Hosting.WindowsXamlManager.InitializeForCurrentThread();
// Create DesktopWindowXamlSource, host for UWP XAML content
desktopWindowXamlSource = new Windows.UI.Xaml.Hosting.DesktopWindowXamlSource();
// Hook OnTakeFocus event for Focus processing
desktopWindowXamlSource.TakeFocusRequested += OnTakeFocusRequested;
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsXamlHostBase"/> class.
/// </summary>
/// <remarks>
/// Default constructor is required for use in WPF markup. When the default constructor is called,
/// object properties have not been set. Put WPF logic in OnInitialized.
/// </remarks>
public WindowsXamlHostBase()
{
// Windows.UI.Xaml.Application object is required for loading custom control metadata. If a custom
// Application object is not provided by the application, the host control will create one (XamlApplication).
// Instantiation of the application object must occur before creating the DesktopWindowXamlSource instance.
// If no Application object is created before DesktopWindowXamlSource is created, DestkopWindowXamlSource
// will create a generic Application object unable to load custom UWP XAML metadata.
Action <XamlApplication> action = Microsoft.Toolkit.Win32.UI.XamlHost.XamlApplication.GetOrCreateXamlApplicationInstance(ref _application);
// Create an instance of the WindowsXamlManager. This initializes and holds a
// reference on the UWP XAML DXamlCore and must be explicitly created before
// any UWP XAML types are programmatically created. If WindowsXamlManager has
// not been created before creating DesktopWindowXamlSource, DesktopWindowXaml source
// will create an instance of WindowsXamlManager internally. (Creation is explicit
// here to illustrate how to initialize UWP XAML before initializing the DesktopWindowXamlSource.)
_windowsXamlManager = windows.UI.Xaml.Hosting.WindowsXamlManager.InitializeForCurrentThread();
action(_application as XamlApplication);
// Create DesktopWindowXamlSource, host for UWP XAML content
_xamlSource = new windows.UI.Xaml.Hosting.DesktopWindowXamlSource();
// Hook DesktopWindowXamlSource OnTakeFocus event for Focus processing
_xamlSource.TakeFocusRequested += OnTakeFocusRequested;
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsXamlHostBase"/> class.
/// </summary>
/// <remarks>
/// Default constructor is required for use in WPF markup. When the default constructor is called,
/// object properties have not been set. Put WPF logic in OnInitialized.
/// </remarks>
public WindowsXamlHostBase()
{
// Create DesktopWindowXamlSource, host for UWP XAML content
_xamlSource = new WUX.Hosting.DesktopWindowXamlSource();
// Hook DesktopWindowXamlSource OnTakeFocus event for Focus processing
_xamlSource.TakeFocusRequested += OnTakeFocusRequested;
}
/// <summary>
/// Responds to DesktopWindowsXamlSource TakeFocusRequested event
/// </summary>
/// <param name="sender">DesktopWindowsXamlSource</param>
/// <param name="args">DesktopWindowXamlSourceTakeFocusRequestedEventArgs</param>
private void OnTakeFocusRequested(Windows.UI.Xaml.Hosting.DesktopWindowXamlSource sender, Windows.UI.Xaml.Hosting.DesktopWindowXamlSourceTakeFocusRequestedEventArgs args)
{
var reason = args.Request.Reason;
if (reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.First || reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.Last)
{
var forward = reason == Windows.UI.Xaml.Hosting.XamlSourceFocusNavigationReason.First;
Parent.SelectNextControl(this, forward, tabStopOnly: true, nested: false, wrap: true);
}
}
/// <summary>
/// WindowsXamlHost Dispose
/// </summary>
/// <param name="disposing">Is disposing?</param>
protected override void Dispose(bool disposing)
{
if (disposing && !IsDisposed)
{
IsDisposed = true;
desktopWindowXamlSource.TakeFocusRequested -= OnTakeFocusRequested;
XamlRootInternal = null;
desktopWindowXamlSource.Dispose();
desktopWindowXamlSource = null;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="UnoXamlHostBase"/> class.
/// </summary>
/// <remarks>
/// Default constructor is required for use in WPF markup. When the default constructor is called,
/// object properties have not been set. Put WPF logic in OnInitialized.
/// </remarks>
public UnoXamlHostBase()
{
if (_metadataContainer is null)
{
throw new InvalidOperationException("Metadata container failed to initialize");
}
// Create DesktopWindowXamlSource, host for UWP XAML content
_xamlSource = new WUX.Hosting.DesktopWindowXamlSource();
// Hook DesktopWindowXamlSource OnTakeFocus event for Focus processing
_xamlSource.TakeFocusRequested += OnTakeFocusRequested;
SizeChanged += OnSizeChanged;
}
/// <summary>
/// Gets the <see cref="IDesktopWindowXamlSourceNative" /> interface from a <see cref="Windows.UI.Xaml.Hosting.DesktopWindowXamlSource" /> instance.
/// </summary>
/// <param name="desktopWindowXamlSource">The DesktopWindowXamlSource instance to get the interface from</param>
/// <returns><see cref="IDesktopWindowXamlSourceNative" /> interface pointer</returns>
/// <remarks>
/// This interface is the only way to set DesktopWindowXamlSource's target window for rendering.
/// </remarks>
public static IDesktopWindowXamlSourceNative GetInterop(this Windows.UI.Xaml.Hosting.DesktopWindowXamlSource desktopWindowXamlSource)
{
var win32XamlSourceIntPtr = Marshal.GetIUnknownForObject(desktopWindowXamlSource);
try
{
var win32XamlSource = Marshal.GetTypedObjectForIUnknown(win32XamlSourceIntPtr, typeof(IDesktopWindowXamlSourceNative)) as IDesktopWindowXamlSourceNative;
return(win32XamlSource);
}
finally
{
Marshal.Release(win32XamlSourceIntPtr);
win32XamlSourceIntPtr = IntPtr.Zero;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="WindowsXamlHostBase"/> class.
/// </summary>
public WindowsXamlHostBase()
{
// Return immediately if control is instantiated by the Visual Studio Designer
// https://stackoverflow.com/questions/1166226/detecting-design-mode-from-a-controls-constructor
if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
{
return;
}
SetStyle(ControlStyles.ContainerControl, true);
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
// Must be a container control with TabStop == false to allow nested UWP XAML Focus
// BUGBUG: Uncomment when nested Focus is available
// TabStop = false;
// Respond to size changes on this Control
SizeChanged += OnWindowXamlHostSizeChanged;
// Windows.UI.Xaml.Application object is required for loading custom control metadata. If a custom
// Application object is not provided by the application, the host control will create one (XamlApplication).
// Instantiation of the application object must occur before creating the DesktopWindowXamlSource instance.
// If no Application object is created before DesktopWindowXamlSource is created, DestkopWindowXamlSource
// will create a generic Application object unable to load custom UWP XAML metadata.
Microsoft.Toolkit.Win32.UI.XamlHost.XamlApplication.GetOrCreateXamlApplicationInstance(ref _application);
// Create an instance of the WindowsXamlManager. This initializes and holds a
// reference on the UWP XAML DXamlCore and must be explicitly created before
// any UWP XAML types are programmatically created. If WindowsXamlManager has
// not been created before creating DesktopWindowXamlSource, DesktopWindowXaml source
// will create an instance of WindowsXamlManager internally. (Creation is explicit
// here to illustrate how to initialize UWP XAML before initializing the DesktopWindowXamlSource.)
_windowsXamlManager = Windows.UI.Xaml.Hosting.WindowsXamlManager.InitializeForCurrentThread();
// Create DesktopWindowXamlSource, host for UWP XAML content
_xamlSource = new Windows.UI.Xaml.Hosting.DesktopWindowXamlSource();
// Hook up method for DesktopWindowXamlSource Focus handling
_xamlSource.TakeFocusRequested += this.OnTakeFocusRequested;
// Check if the XAML island scales the content according to the current dpi value
_xamlIslandHandlesDpiScaling = ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 8);
// Add scaling panel as the root XAML element
_xamlSource.Content = new DpiScalingPanel();
}
/// <summary>
/// Gets the <see cref="IDesktopWindowXamlSourceNative" /> interface from a <see cref="WUX.Hosting.DesktopWindowXamlSource" /> instance.
/// </summary>
/// <typeparam name="TInterface">The interface to cast to</typeparam>
/// <param name="desktopWindowXamlSource">The DesktopWindowXamlSource instance to get the interface from</param>
/// <returns><see cref="IDesktopWindowXamlSourceNative" /> interface pointer</returns>
/// <remarks>
/// This interface is the only way to set DesktopWindowXamlSource's target window for rendering.
/// </remarks>
public static TInterface GetInterop <TInterface>(this WUX.Hosting.DesktopWindowXamlSource desktopWindowXamlSource)
where TInterface : class
{
var win32XamlSourceIntPtr = Marshal.GetIUnknownForObject(desktopWindowXamlSource);
try
{
var win32XamlSource = Marshal.GetTypedObjectForIUnknown(win32XamlSourceIntPtr, typeof(TInterface)) as TInterface;
return(win32XamlSource);
}
finally
{
Marshal.Release(win32XamlSourceIntPtr);
win32XamlSourceIntPtr = IntPtr.Zero;
}
}
public WindowsXamlHostBase()
{
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
// Respond to size changes on this Control
SizeChanged += WindowsXamlHost_SizeChanged;
// Create a custom UWP XAML Application object that implements reflection-based XAML metdata probing.
// Instantiation of the application object must occur before creating the DesktopWindowXamlSource instance.
// DesktopWindowXamlSource will create a generic Application object unable to load custom UWP XAML metadata.
if (_application == null)
{
try
{
// global::Windows.UI.Xaml.Application.Current may throw if DXamlCore has not been initialized.
// Treat the exception as an uninitialized global::Windows.UI.Xaml.Application condition.
_application = Windows.UI.Xaml.Application.Current as XamlApplication;
}
catch
{
_application = new XamlApplication();
}
}
// Create an instance of the WindowsXamlManager. This initializes and holds a
// reference on the UWP XAML DXamlCore and must be explicitly created before
// any UWP XAML types are programmatically created. If WindowsXamlManager has
// not been created before creating DesktopWindowXamlSource, DesktopWindowXaml source
// will create an instance of WindowsXamlManager internally. (Creation is explicit
// here to illustrate how to initialize UWP XAML before initializing the DesktopWindowXamlSource.)
_windowsXamlManager = Windows.UI.Xaml.Hosting.WindowsXamlManager.InitializeForCurrentThread();
// Create DesktopWindowXamlSource, host for UWP XAML content
desktopWindowXamlSource = new Windows.UI.Xaml.Hosting.DesktopWindowXamlSource();
}