protected virtual void OnCurrentHwndSourceChanged(DependencyPropertyChangedEventArgs e)
{
Initialize();
// Unregister the old keyboard input site.
IKeyboardInputSite keyboardInputSite = ((IKeyboardInputSink)this).KeyboardInputSite;
if (keyboardInputSite != null)
{
((IKeyboardInputSink)this).KeyboardInputSite = null;
keyboardInputSite.Unregister();
}
// Register the new keyboard input site with the containing
// HwndSource.
IKeyboardInputSink sink = CurrentHwndSource;
if (sink != null)
{
((IKeyboardInputSink)this).KeyboardInputSite = sink.RegisterKeyboardInputSink(this);
}
// Set the owner of the RedirectedWindow to our CurrentHwndSource.
// This keeps the RedirectedWindow on top of the HwndSource.
if (CurrentHwndSource != null)
{
HWND hwndSource = new HWND(CurrentHwndSource.Handle);
HWND hwndRoot = hwndSource; // User32NativeMethods.GetAncestor(hwndSource, GA.ROOT); // need to get the top-level window?
NativeMethods.SetWindowLongPtr(
_redirectedWindow.Handle,
GWL.HWNDPARENT,
hwndRoot.DangerousGetHandle());
}
}
private void OnSourceChanged(object sender, SourceChangedEventArgs e)
{
IKeyboardInputSite keyboardInputSite = ((IKeyboardInputSink)this).KeyboardInputSite;
if (keyboardInputSite != null)
{
((IKeyboardInputSink)this).KeyboardInputSite = null;
keyboardInputSite.Unregister();
}
IKeyboardInputSink sink = source as IKeyboardInputSink;
if (sink != null)
{
((IKeyboardInputSink)this).KeyboardInputSite = sink.RegisterKeyboardInputSink(this);
}
source = e.NewSource;
if (!isBuildingWindow)
{
isBuildingWindow = true;
HwndSource parent = (HwndSource)e.NewSource;
try
{
if (hWnd.Handle == IntPtr.Zero)
{
hWnd = new HandleRef(this, ((INativeHandleContract)contract.Contract).GetHandle());
LayoutUpdated += OnLayoutUpdated;
IsEnabledChanged += OnEnabledChanged;
IsVisibleChanged += OnVisibleChanged;
PostMessage(new HandleRef(null, Handle), 0x9005, parent.Handle, IntPtr.Zero);
PostMessage(new HandleRef(null, Handle), 0x9002, IntPtr.Zero, IntPtr.Zero);
InvalidateMeasure();
}
}
finally
{
isBuildingWindow = false;
}
}
else
{
Debug.Assert(false);
}
}
private void OnSourceChanged(object sender, SourceChangedEventArgs e)
{
IKeyboardInputSite keyboardInputSite = ((IKeyboardInputSink)this).KeyboardInputSite;
if (keyboardInputSite != null)
{
if (this._fTrusted.Value)
{
new UIPermission(PermissionState.Unrestricted).Assert();
}
try
{
((IKeyboardInputSink)this).KeyboardInputSite = null;
keyboardInputSite.Unregister();
}
finally
{
if (this._fTrusted.Value)
{
CodeAccessPermission.RevertAssert();
}
}
}
IKeyboardInputSink keyboardInputSink = PresentationSource.CriticalFromVisual(this, false) as IKeyboardInputSink;
if (keyboardInputSink != null)
{
if (this._fTrusted.Value)
{
new UIPermission(PermissionState.Unrestricted).Assert();
}
try
{
((IKeyboardInputSink)this).KeyboardInputSite = keyboardInputSink.RegisterKeyboardInputSink(this);
}
finally
{
if (this._fTrusted.Value)
{
CodeAccessPermission.RevertAssert();
}
}
}
this.BuildOrReparentWindow();
}
private void OnSourceChanged(object sender, SourceChangedEventArgs e)
{
// Remove ourselves as an IKeyboardInputSinks child of our previous
// containing window.
IKeyboardInputSite keyboardInputSite = ((IKeyboardInputSink)this).KeyboardInputSite;
if (keyboardInputSite != null)
{
// Derived classes that implement IKeyboardInputSink should support setting it to null.
((IKeyboardInputSink)this).KeyboardInputSite = null;
keyboardInputSite.Unregister();
}
// Add ourselves as an IKeyboardInputSinks child of our containing window.
IKeyboardInputSink source = PresentationSource.CriticalFromVisual(this, false /* enable2DTo3DTransition */) as IKeyboardInputSink;
if (source != null)
{
((IKeyboardInputSink)this).KeyboardInputSite = source.RegisterKeyboardInputSink(this);
}
BuildOrReparentWindow();
}
