protected sealed override HWND BuildWindowCore(HWND hwndParent)
{
HwndSourceParameters hwndSourceParameters = new HwndSourceParameters();
hwndSourceParameters.WindowStyle = (int)(WS.VISIBLE | WS.CHILD | WS.CLIPSIBLINGS | WS.CLIPCHILDREN);
//hwndSourceParameters.ExtendedWindowStyle = (int)(WS_EX.NOACTIVATE);
hwndSourceParameters.ParentWindow = hwndParent.DangerousGetHandle();
_hwndSource = new HwndSource(hwndSourceParameters);
_hwndSource.SizeToContent = SizeToContent.Manual;
// TODO: make this an option
// On Vista, or when Win7 uses vista-blit, DX content is not
// available via BitBlit or PrintWindow? If WPF is using hardware
// acceleration, anything it renders won't be available either.
// One workaround is to force WPF to use software rendering. Of
// course, this is only a partial workaround since other content
// like XNA or D2D won't work either.
//_hwndSource.CompositionTarget.RenderMode = RenderMode.SoftwareOnly;
// Set the root visual of the HwndSource to an instance of
// HwndSourceHostRoot. Hook it up as a logical child if
// we are on the same thread.
HwndSourceHostRoot root = new HwndSourceHostRoot();
_hwndSource.RootVisual = root;
root.OnMeasure += OnRootMeasured;
AddLogicalChild(_hwndSource.RootVisual);
SetRootVisual(Child);
return(new HWND(_hwndSource.Handle));
}
/// <summary>
/// Determine the desired size of this element within the
/// specified constraints.
/// </summary>
protected override Size MeasureOverride(Size constraint)
{
if (_hwndSource != null && _hwndSource.RootVisual != null)
{
HwndSourceHostRoot root = (HwndSourceHostRoot)_hwndSource.RootVisual;
// We are a simple pass-through element.
root.Measure(constraint);
return(root.DesiredSize);
}
else
{
// We don't have a child yet.
return(new Size());
}
}
// Delegate IKeyboardInputSink calls to the hosted HwndSource.
protected sealed override bool TranslateAcceleratorCore(ref MSG msg, ModifierKeys modifiers)
{
if (_hwndSource != null)
{
HwndSourceHostRoot root = (HwndSourceHostRoot)_hwndSource.RootVisual;
Debug.Assert(root.IsLogicalParentEnabled);
root.IsLogicalParentEnabled = false;
try {
return(((IKeyboardInputSink)_hwndSource).TranslateAccelerator(ref msg, modifiers));
} finally {
root.IsLogicalParentEnabled = true;
}
}
else
{
return(base.TranslateAcceleratorCore(ref msg, modifiers));
}
}
private object SetRootVisual(object arg)
{
Debug.Assert(_hwndSource != null);
FrameworkElement child = arg as FrameworkElement;
if (child == null && arg is Uri)
{
child = (FrameworkElement)Application.LoadComponent((Uri)arg);
}
HwndSourceHostRoot root = (HwndSourceHostRoot)_hwndSource.RootVisual;
root.Child = child;
// Invalidate measure on this HwndHost so that we can remeasure
// ourselves to our content.
InvalidateMeasure();
return(null);
}
protected sealed override HWND BuildWindowOverride(HWND hwndParent)
{
HwndSourceParameters hwndSourceParameters = new HwndSourceParameters();
hwndSourceParameters.WindowStyle = (int)(WS.VISIBLE | WS.CHILD | WS.CLIPSIBLINGS | WS.CLIPCHILDREN);
hwndSourceParameters.ParentWindow = hwndParent.DangerousGetHandle();
_hwndSource = new HwndSource(hwndSourceParameters);
_hwndSource.SizeToContent = SizeToContent.Manual;
// Set the root visual of the HwndSource to an instance of
// HwndSourceHostRoot. Hook it up as a logical child if
// we are on the same thread.
HwndSourceHostRoot root = new HwndSourceHostRoot();
_hwndSource.RootVisual = root;
root.OnMeasure += OnRootMeasured;
AddLogicalChild(_hwndSource.RootVisual);
SetRootVisual(Child);
return(new HWND(_hwndSource.Handle));
}
protected override sealed HWND BuildWindowOverride(HWND hwndParent)
{
HwndSourceParameters hwndSourceParameters = new HwndSourceParameters();
hwndSourceParameters.WindowStyle = (int)(WS.VISIBLE | WS.CHILD | WS.CLIPSIBLINGS | WS.CLIPCHILDREN);
hwndSourceParameters.ParentWindow = hwndParent.DangerousGetHandle();
_hwndSource = new HwndSource(hwndSourceParameters);
_hwndSource.SizeToContent = SizeToContent.Manual;
// Set the root visual of the HwndSource to an instance of
// HwndSourceHostRoot. Hook it up as a logical child if
// we are on the same thread.
HwndSourceHostRoot root = new HwndSourceHostRoot();
_hwndSource.RootVisual = root;
root.OnMeasure += OnRootMeasured;
AddLogicalChild(_hwndSource.RootVisual);
SetRootVisual(Child);
return new HWND(_hwndSource.Handle);
}
protected override sealed HWND BuildWindowCore(HWND hwndParent)
{
HwndSourceParameters hwndSourceParameters = new HwndSourceParameters();
hwndSourceParameters.WindowStyle = (int)(WS.VISIBLE | WS.CHILD | WS.CLIPSIBLINGS | WS.CLIPCHILDREN);
//hwndSourceParameters.ExtendedWindowStyle = (int)(WS_EX.NOACTIVATE);
hwndSourceParameters.ParentWindow = hwndParent.DangerousGetHandle();
_hwndSource = new HwndSource(hwndSourceParameters);
_hwndSource.SizeToContent = SizeToContent.Manual;
// TODO: make this an option
// On Vista, or when Win7 uses vista-blit, DX content is not
// available via BitBlit or PrintWindow? If WPF is using hardware
// acceleration, anything it renders won't be available either.
// One workaround is to force WPF to use software rendering. Of
// course, this is only a partial workaround since other content
// like XNA or D2D won't work either.
//_hwndSource.CompositionTarget.RenderMode = RenderMode.SoftwareOnly;
// Set the root visual of the HwndSource to an instance of
// HwndSourceHostRoot. Hook it up as a logical child if
// we are on the same thread.
HwndSourceHostRoot root = new HwndSourceHostRoot();
_hwndSource.RootVisual = root;
root.OnMeasure += OnRootMeasured;
AddLogicalChild(_hwndSource.RootVisual);
SetRootVisual(Child);
return new HWND(_hwndSource.Handle);
}
