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// deferWndMove.cpp: implementation of the CDeferWndMove class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "deferWndMove.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CDeferWndMove::CDeferWndMove(int nNumWindows) : m_hdwp(NULL)
{
if (nNumWindows)
BeginMove(nNumWindows);
}
CDeferWndMove::~CDeferWndMove()
{
if (m_hdwp)
EndMove();
}
BOOL CDeferWndMove::BeginMove(int nNumWindows)
{
ASSERT (nNumWindows > 0);
if (m_hdwp)
EndMove();
if (nNumWindows > 0)
m_hdwp = ::BeginDeferWindowPos(nNumWindows);
return (m_hdwp != NULL);
}
BOOL CDeferWndMove::EndMove()
{
ASSERT (m_hdwp);
BOOL bRes = ::EndDeferWindowPos(m_hdwp);
m_hdwp = NULL;
return bRes;
}
BOOL CDeferWndMove::MoveWindow(CWnd* pWnd, int x, int y, int nWidth, int nHeight, BOOL bRepaint)
{
ASSERT (m_hdwp);
if (!m_hdwp)
return FALSE;
ASSERT (pWnd->GetParent());
// figure out what flags we need
int nFlags = SWP_NOACTIVATE | SWP_NOZORDER;
CRect rWnd;
pWnd->GetWindowRect(rWnd);
pWnd->GetParent()->ScreenToClient(rWnd);
if (x == rWnd.left && y == rWnd.top)
nFlags |= SWP_NOMOVE;
if (nWidth == rWnd.Width() && nHeight == rWnd.Height())
nFlags |= SWP_NOSIZE;
BOOL bNeedMove = !((nFlags & SWP_NOMOVE) && (nFlags & SWP_NOSIZE));
if (!bNeedMove)
return TRUE;
if (!bRepaint)
nFlags |= SWP_NOREDRAW;
HWND hWnd = pWnd->GetSafeHwnd();
m_hdwp = ::DeferWindowPos(m_hdwp, hWnd, HWND_BOTTOM, x, y, nWidth, nHeight, nFlags);
// fallback
if (!m_hdwp)
{
ASSERT (0); // shouldn't fail but it might
::SetWindowPos(hWnd, HWND_BOTTOM, x, y, nWidth, nHeight, nFlags);
}
return TRUE;
}
BOOL CDeferWndMove::MoveWindow(CWnd* pWnd, LPCRECT lpRect, BOOL bRepaint)
{
return MoveWindow(pWnd, lpRect->left, lpRect->top,
lpRect->right - lpRect->left,
lpRect->bottom - lpRect->top, bRepaint);
}
CRect CDeferWndMove::OffsetCtrl(CWnd* pParent, UINT nCtrlID, int x, int y)
{
CWnd* pCtrl = pParent->GetDlgItem(nCtrlID);
if (pCtrl)
{
CRect rChild;
pCtrl->GetWindowRect(rChild);
pParent->ScreenToClient(rChild);
if (x || y)
{
rChild.OffsetRect(x, y);
MoveWindow(pCtrl, rChild); // our own version
}
return rChild;
}
return CRect(0, 0, 0, 0);
}
CRect CDeferWndMove::ResizeCtrl(CWnd* pParent, UINT nCtrlID, int cx, int cy)
{
CWnd* pCtrl = pParent->GetDlgItem(nCtrlID);
if (pCtrl)
{
CRect rChild, rParent;
pCtrl->GetWindowRect(rChild);
pParent->ScreenToClient(rChild);
pParent->GetClientRect(rParent);
if (cx || cy)
{
rChild.right += cx;
rChild.bottom += cy;
// make sure it also intersects with parent
if (rChild.IntersectRect(rChild, rParent))
MoveWindow(pCtrl, rChild); // our own version
}
return rChild;
}
return CRect(0, 0, 0, 0);
}
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.dan.g. is a naturalised Australian and has been developing commercial windows software since 1998.