globalmfchelperfunc.cpp

vc++网络程序设计实例详解 人民邮电出版社1-2章源码

#include <afxwin.h>
#include "GlobalMFCHelperFunc.h"
#include "RemoteAdminView.h"
#include "MachineView.h"
#include "RemoteAdminDoc.h"
#include "MainFrame.h"
#include "RemoteAdmin.h"

CRemoteAdminDoc* MFC_DocView::GetAppDocument()
{
    CDocManager* pDocManager = ::AfxGetApp()->m_pDocManager;

    // As only one document template exits , we can avoid the check, as to at
    // which position in the template list our document template is stored
    // We know it is at the first position.
    POSITION posDocTemplate = pDocManager->GetFirstDocTemplatePosition();
    CSingleDocTemplate* pDocTemplate = static_cast<CSingleDocTemplate*>(pDocManager->GetNextDocTemplate(posDocTemplate));

    POSITION posDoc = pDocTemplate->GetFirstDocPosition();
    CRemoteAdminDoc* pDoc = static_cast<CRemoteAdminDoc*>(pDocTemplate->GetNextDoc(posDoc));

    ASSERT_VALID(pDoc);
	ASSERT_KINDOF(CRemoteAdminDoc, pDoc);
    
	return pDoc;
}

CRemoteAdminView* MFC_DocView::GetRemoteAdminView()
{
    CRemoteAdminDoc* pDoc = MFC_DocView::GetAppDocument();

	POSITION pos = pDoc->GetFirstViewPosition();
    CView* t_pView = NULL;

    while(pos != NULL)
	{
		t_pView = pDoc->GetNextView(pos);
		if(t_pView->IsKindOf(RUNTIME_CLASS(CRemoteAdminView)))
        {
            return static_cast<CRemoteAdminView*>(t_pView);
        }
			
	}
	
    // Could not get the Remote Admin View
    ASSERT(NULL);

	return NULL;
}

CMachineView* MFC_DocView::GetMachineView()
{
    CRemoteAdminDoc* pDoc = MFC_DocView::GetAppDocument();

	POSITION pos = pDoc->GetFirstViewPosition();
    CView* t_pView = NULL;

	while(pos != NULL)
	{
	    t_pView = pDoc->GetNextView(pos);
		if(t_pView->IsKindOf(RUNTIME_CLASS(CMachineView)))
        {
            return (static_cast<CMachineView*>(t_pView));
        }
	}
	
    // Could not get the Machine View
    ASSERT(NULL);

	return NULL;
}

CMainFrame* MFC_DocView::GetMainFrame()
{
    CMainFrame* pMainFrame = static_cast<CMainFrame*>(::AfxGetMainWnd());
    
    ASSERT(pMainFrame);
    ASSERT_KINDOF(CMainFrame, pMainFrame);

    return pMainFrame;
}


/* Helps in removing the casting problem while using AfxGetApp(), as it returns a (CWinApp*)
   not a (CRemoteAdminApp*).  So we can use the application pointer directly. */
CRemoteAdminApp* MFC_DocView::GetApp()	
{
	CRemoteAdminApp* pApp = static_cast<CRemoteAdminApp*>(::AfxGetApp());
	ASSERT(pApp);

	/* Can't use ASSERT_KINDOF as the CRamoteAdminApp class is not built with
	 the macros DELARE_DYNAMIC() or DECALRE_SERIAL() */
//	ASSERT_KINDOF(CRemoteAdminApp, pApp);

	return pApp;
}