www.gusucode.com > VC++将对话框做为MDI子窗口的示例程序-源码程序 > VC++将对话框做为MDI子窗口的示例程序-源码程序/code/MDIDialog.cpp

    // MDIDialog.cpp : implementation file
// Download by http://www.NewXing.com

#include "stdafx.h"
#include "TSML.h"
#include "MDIDialog.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMDIDialog dialog


CMDIDialog::CMDIDialog(LPCTSTR lpszTemplateName,CWnd* pParent/* = NULL*/)
: CDialog(lpszTemplateName, pParent)
{
	bInserted=0;
}

CMDIDialog::CMDIDialog(UINT nIDTemplate,CWnd* pParent /*= NULL*/)
: CDialog(nIDTemplate, pParent)
{
	//{{AFX_DATA_INIT(CMDIDialog)
	// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	bInserted=0;
}


void CMDIDialog::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMDIDialog)
	// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CMDIDialog, CDialog)
//{{AFX_MSG_MAP(CMDIDialog)
ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMDIDialog message handlers

void CMDIDialog::OnCancel() 
{
	if(bInserted) DestroyWindow();	
	//	CDialog::OnCancel();//已销毁，不能再销毁
}

void CMDIDialog::OnOK() 
{
	if(bInserted) DestroyWindow();	
	//	CDialog::OnOK();//已销毁，不能再销毁
}

void CMDIDialog::OnDestroy() 
{
	CDialog::OnDestroy();
	// TODO: Add your message handler code here
	if(bInserted) delete(this);
}

void CMDIDialog::DoInsert()
{
	CMDIFrameWnd *pWnd=(CMDIFrameWnd *) ::AfxGetMainWnd();
	CWnd *pChildWnd = FromHandle(pWnd->m_hWndMDIClient);
	bInserted=1;
	Create(IDD_DIALOG_CHILD,NULL);
	SetParent(pChildWnd);
	if(GetStyle()&DS_CENTER) 
		CenterWindow();
	SetFocus();//OK
	ShowWindow(SW_SHOW);
	UpdateWindow();
}

void CMDIDialog::CenterWindow(CWnd *pAlternateOwner)
{
	CWnd* pWnd = ::AfxGetMainWnd();
	CRect rect;
	int nx, ny;
	
	if ( bInserted )
		if ( pAlternateOwner != NULL )//如非空，则有参照窗，直接做可也
			CDialog::CenterWindow(pAlternateOwner);
		else
        {
			pWnd = AfxGetMainWnd();
			
			pWnd -> GetClientRect(&rect);
			nx = rect.Width() / 2;
			ny = rect.Height() / 2;
			
			GetWindowRect(&rect);
			nx -= rect.Width()/2;
			ny -= rect.Height()/2;

			if ( nx <0 )
			{
				nx=0;
				ny /=2;
			} 
			if ( ny <0 ) 
			{
				ny=0;
				nx/=2;
			} 
			SetWindowPos(NULL, nx, ny, 0, 0, SWP_NOSIZE); 
		} 
	else   
		CDialog::CenterWindow(pAlternateOwner);
		
}

BOOL CMDIDialog::IsWndInserted()
{
	return bInserted;
}