CBaseControlVideo::SetTargetRect

Microsoft DirectShow 9.0

CBaseControlVideo::SetTargetRect

The SetTargetRect method sets the current target rectangle (pure virtual). This is an internal member function that gets called when the destination rectangle changes.

Syntax

  virtual HRESULT SetTargetRect(
    RECT *pTargetRect
) PURE;

Parameters

pTargetRect

Pointer to the destination rectangle.

Return Value

Returns an HRESULT value.

Remarks

Derived classes should override this to know when the destination rectangle changes. It is called from the following member functions.

• CBaseControlVideo::SetDestinationPosition
• CBaseControlVideo::put_DestinationLeft
• CBaseControlVideo::put_DestinationWidth
• CBaseControlVideo::put_DestinationTop
• CBaseControlVideo::put_DestinationHeight

The following example demonstrates an implementation of this function in a derived class.

HRESULT CVideoText::SetTargetRect(RECT *pTargetRect)
{
    m_pRenderer->m_DrawImage.SetTargetRect(pTargetRect);
    return NOERROR;
}

In this example, CVideoText is a class derived from CBaseControlVideo, m_pRenderer holds an object of a class derived from CBaseVideoRenderer, and the m_DrawImage data member, defined in the derived class, holds a CDrawImage object.

Requirements

**  Header:** Declared in Ctlutil.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

See Also

• CBaseControlVideo Class