checkfrm.cpp

visual c++ 实例编程

#include "stdafx.h"
#include "Checkfrm.h"

// EnumChildWnds Callback
// 查找框架内控件
BOOL CALLBACK EnumChildWnds(HWND hwnd, CCheckFrame *pObj)
{
	CRect R;
	GetWindowRect(hwnd, &R);
	pObj->m_pDialog->ScreenToClient(&R);

	if (hwnd != pObj->m_pFrame->m_hWnd)
	{
		if (IsRectContainedInRect(R, pObj->m_rFrm))
			pObj->m_adwWndHandles.Add((DWORD)hwnd);
	}

	return TRUE;
}

//设置一框架为检查框架
//pParentWnd::框架父窗口
//nFrmCtl::框架ID
void CCheckFrame::Set(CWnd *pParentWnd, UINT nFrmCtl)
{
	m_pDialog = pParentWnd;

	// Calculate the size of the rect that should contain the controls
	m_pFrame = m_pDialog->GetDlgItem(nFrmCtl);
	if (!m_pFrame)
	{
		AfxMessageBox("Unable to find frame control");
		return;
	}
	m_pFrame->GetWindowRect(&m_rFrm);
	m_pDialog->ScreenToClient(&m_rFrm);

	// Make sure the array is empty
	m_adwWndHandles.RemoveAll();

	// The (control) windows contained within the boundaries of the frame control
	// are enumerated and their associated window-handles collected in an array.
	EnumChildWindows(m_pDialog->m_hWnd, (WNDENUMPROC)EnumChildWnds, (LONG)(CCheckFrame *)this);

}

//允许或禁止框架中所有控件
void CCheckFrame::Enable(BOOL bEnable)
{
	for (int i=0 ; i<m_adwWndHandles.GetSize() ; i++)
		EnableWindow((HWND)m_adwWndHandles[i], bEnable);
}
//判断 rcChild  是否完全在 RcMother  内
BOOL IsRectContainedInRect(CRect &rcChild, CRect &rcMother)
{	 

	if (rcMother.PtInRect(CPoint(rcChild.left,  rcChild.top)) &&
		rcMother.PtInRect(CPoint(rcChild.left,  rcChild.bottom)) &&
		rcMother.PtInRect(CPoint(rcChild.right, rcChild.top)) &&
		rcMother.PtInRect(CPoint(rcChild.right, rcChild.bottom)))
		return TRUE;

	return FALSE;
}