private void BuildWindow(HandleRef hwndParent)
{
this.DemandIfUntrusted();
this._hwnd = this.BuildWindowCore(hwndParent);
if (this._hwnd.Handle == IntPtr.Zero || !UnsafeNativeMethods.IsWindow(this._hwnd))
{
throw new InvalidOperationException(SR.Get("ChildWindowNotCreated"));
}
int windowLong = UnsafeNativeMethods.GetWindowLong(new HandleRef(this, this._hwnd.Handle), -16);
if ((windowLong & 1073741824) == 0)
{
throw new InvalidOperationException(SR.Get("HostedWindowMustBeAChildWindow"));
}
if (hwndParent.Handle != UnsafeNativeMethods.GetParent(this._hwnd))
{
throw new InvalidOperationException(SR.Get("ChildWindowMustHaveCorrectParent"));
}
if (DpiUtil.GetDpiAwarenessContext(this._hwnd.Handle) != DpiUtil.GetDpiAwarenessContext(hwndParent.Handle))
{
this._hasDpiAwarenessContextTransition = true;
}
int num;
int windowThreadProcessId = UnsafeNativeMethods.GetWindowThreadProcessId(this._hwnd, out num);
if (windowThreadProcessId == SafeNativeMethods.GetCurrentThreadId() && num == SafeNativeMethods.GetCurrentProcessId())
{
this._hwndSubclass = new HwndSubclass(this._hwndSubclassHook);
this._hwndSubclass.CriticalAttach(this._hwnd.Handle);
}
UnsafeNativeMethods.ShowWindowAsync(this._hwnd, 0);
NativeMethods.RECT rect = default(NativeMethods.RECT);
SafeNativeMethods.GetWindowRect(this._hwnd, ref rect);
PresentationSource presentationSource = PresentationSource.CriticalFromVisual(this, false);
Point point = new Point((double)rect.left, (double)rect.top);
Point point2 = new Point((double)rect.right, (double)rect.bottom);
point = presentationSource.CompositionTarget.TransformFromDevice.Transform(point);
point2 = presentationSource.CompositionTarget.TransformFromDevice.Transform(point2);
this._desiredSize = new Size(point2.X - point.X, point2.Y - point.Y);
base.InvalidateMeasure();
}
private void BuildWindow(HandleRef hwndParent)
{
// Demand unmanaged code to the caller. IT'S RISKY TO REMOVE THIS
DemandIfUntrusted();
// Allow the derived class to build our HWND.
_hwnd = BuildWindowCore(hwndParent);
if (_hwnd.Handle == IntPtr.Zero || !UnsafeNativeMethods.IsWindow(_hwnd))
{
throw new InvalidOperationException(SR.Get(SRID.ChildWindowNotCreated));
}
// Make sure that the window that was created is indeed a child window.
int windowStyle = UnsafeNativeMethods.GetWindowLong(new HandleRef(this, _hwnd.Handle), NativeMethods.GWL_STYLE);
if ((windowStyle & NativeMethods.WS_CHILD) == 0)
{
throw new InvalidOperationException(SR.Get(SRID.HostedWindowMustBeAChildWindow));
}
// Make sure the child window is the child of the expected parent window.
if (hwndParent.Handle != UnsafeNativeMethods.GetParent(_hwnd))
{
throw new InvalidOperationException(SR.Get(SRID.ChildWindowMustHaveCorrectParent));
}
// Test to see if hwndParent and _hwnd have different DPI_AWARENESS_CONTEXT's
if (DpiUtil.GetDpiAwarenessContext(_hwnd.Handle) != DpiUtil.GetDpiAwarenessContext(hwndParent.Handle))
{
_hasDpiAwarenessContextTransition = true;
}
// Only subclass the child HWND if it is owned by our thread.
int idWindowProcess;
int idWindowThread = UnsafeNativeMethods.GetWindowThreadProcessId(_hwnd, out idWindowProcess);
#if WCP_SERVER2003_OR_LATER_ENABLED
IntPtr hCurrentThread = UnsafeNativeMethods.GetCurrentThread();
if ((idWindowThread == SafeNativeMethods.GetThreadId(hCurrentThread)) &&
(idWindowProcess == UnsafeNativeMethods.GetProcessIdOfThread(hCurrentThread)))
#else
if ((idWindowThread == SafeNativeMethods.GetCurrentThreadId()) &&
(idWindowProcess == SafeNativeMethods.GetCurrentProcessId()))
#endif
{
_hwndSubclass = new HwndSubclass(_hwndSubclassHook);
_hwndSubclass.CriticalAttach(_hwnd.Handle);
}
// Initially make sure the window is hidden. We will show it later during rendering.
UnsafeNativeMethods.ShowWindowAsync(_hwnd, NativeMethods.SW_HIDE);
// Assume the desired size is the initial size. If the window was
// created with a 0-length dimension, we assume this means we
// should fill all available space.
NativeMethods.RECT rc = new NativeMethods.RECT();
SafeNativeMethods.GetWindowRect(_hwnd, ref rc);
// Convert from pixels to measure units.
// PresentationSource can't be null if we get here.
PresentationSource source = PresentationSource.CriticalFromVisual(this, false /* enable2DTo3DTransition */);
Point ptUpperLeft = new Point(rc.left, rc.top);
Point ptLowerRight = new Point(rc.right, rc.bottom);
ptUpperLeft = source.CompositionTarget.TransformFromDevice.Transform(ptUpperLeft);
ptLowerRight = source.CompositionTarget.TransformFromDevice.Transform(ptLowerRight);
_desiredSize = new Size(ptLowerRight.X - ptUpperLeft.X, ptLowerRight.Y - ptUpperLeft.Y);
// We have a new desired size, so invalidate measure.
InvalidateMeasure();
}