PRB: SetItemRects Causes Server to Change Zoom Factor

MORE INFORMATION

COleClientItem::SetItemRects() calls IOleInPlaceObject::SetObjectRects() and passes its parameters. The following is the description of IOleInPlaceObject::SetObjectRects() in Volume 2 of the OLE2 Programmer's Reference: The object's width and height are determined by the extent information passed to it via COleClientItem::SetExtent() -- which calls IOleObject::SetExtent on the in-place object). Therefore if you want the client application to change the rectangle used by an in-place active object, have it first set the extent of the object in HIMETRIC units to the size of the new rectangle and then set the rectangle.

The following sample code demonstrates this technique. It assumes that CMyClientItem is derived from COleClientItem and that rect has coordinates specified with respect to the view which contains the object. It returns true if SetItemRects was successful.

Sample Code

BOOL CMyClientItem::MySetObjectRects(CRect &rect)
{
  ASSERT_VALID(this);
  ASSERT(m_lpObject != NULL);
  ASSERT(IsInPlaceActive());

  // get the size of this new rectangle
  CSize size = rect.Size();

  // now convert this size to HIMETRIC units
  size.cx = XformHeightInPixelsToHimetric(NULL, size.cx);
  size.cy = XformWidthInPixelsToHimetric(NULL, size.cy);

  // use this size to set the extent of the object
  SetExtent(size);

  // finally set the new size for the in-place window
  return SetItemRects(rect, rect);
}