Using MRU on submenu

The following contains a method for putting MRU's on a separate submenu.

After studying Todd C. Gleason's method for implementing MRU's on a submenu MRU's, I ended up taking a slightly different approach. Namely, a helper function to handle the application's OnUpdateFileMruFile1(CCmdUI* pCmdUI) function.

CRecentFileList::UpdateMenu() seems to work OK if there's another item on the submenu before the MRU. So we insert such an item, update the menu, and then remove the inserted menu.

The update function seems to be called under various circumstances.
  • m_pMenu != 0 && m_pSubMenu != 0 -- popup menu opened up but not the submenu
    Don't do anything
  • m_pMenu != 0 && m_pSubMenu == 0 -- Opening the submenu
    Fix up then menu
  • m_pMenu == 0 && m_pSubMenu == 0 -- We've clicked on menu
    Don't do anything
//////////////////////////////////////////////////////////////////////
// SubmenuMRU.h
//
#ifndef _SUBMENUMRU_H_
#define _SUBMENUMRU_H_

class SubmenuMRU
{
public:
  static void Handle_OnUpdateFileMruFile1(CCmdUI* pCmdUI, CRecentFileList* pRecentFileList);
};

#endif
//////////////////////////////////////////////////////////////////////
// SubmenuMRU.cpp
//
#include 
#include 

#include "SubmenuMRU.h"

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

void SubmenuMRU::Handle_OnUpdateFileMruFile1(CCmdUI* pCmdUI, CRecentFileList* pRecentFileList)
{
	if (pRecentFileList == NULL) // no MRU files
		pCmdUI->Enable(FALSE);
	else
    {
        if (pCmdUI->m_pMenu && !pCmdUI->m_pSubMenu) // Only do something if we're the submenu
        {
            // Insert a separator so that CRecentFileList::UpdateMenu() will behave
            pCmdUI->m_pMenu->InsertMenu(0, MF_SEPARATOR | MF_BYPOSITION);
            pCmdUI->m_nIndex++;
            pCmdUI->m_nIndexMax++;

            pRecentFileList->UpdateMenu(pCmdUI); // Update the menu

            // Get rid of the separator we just inerted
            pCmdUI->m_pMenu->DeleteMenu(0, MF_BYPOSITION);
            pCmdUI->m_nIndex--;
            pCmdUI->m_nIndexMax--;
        }
    }
}
//////////////////////////////////////////////////////////////////////
// Snippet from test program's MenuTest.rc
//
IDR_MAINFRAME MENU PRELOAD DISCARDABLE 
BEGIN
    POPUP "&File"
    BEGIN
		...
        POPUP "Recent &Files"
        BEGIN
            MENUITEM "Recent File", ID_FILE_MRU_FILE1, GRAYED
        END
        MENUITEM SEPARATOR
        MENUITEM "E&xit", ID_APP_EXIT
    END
	...
END
//////////////////////////////////////////////////////////////////////
// Snippet from test program's MenuTest.cpp
//
#include "SubmenuMRU.h"

BEGIN_MESSAGE_MAP(CMenuTestApp, CWinApp)
	...
	ON_UPDATE_COMMAND_UI(ID_FILE_MRU_FILE1, OnUpdateFileMruFile1)
END_MESSAGE_MAP()


void CMenuTestApp::OnUpdateFileMruFile1(CCmdUI* pCmdUI) 
{
    // TODO: Add your command update UI handler code here
    SubmenuMRU::Handle_OnUpdateFileMruFile1(pCmdUI, m_pRecentFileList);
}



Comments

  • How to delete a item of recent file list?

    Posted by Legacy on 08/21/2001 12:00am

    Originally posted by: Cherry

    When select a file from recent file list.
    But the file wat changed by others and not the format I need.
    So I want to delete this file from recent file list.
    I know add a file is AddToRecentFileList(LPCTSTR lpszPathName), but how to delete one?
    Thank you!

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Live Event Date: December 11, 2014 @ 1:00 p.m. ET / 10:00 a.m. PT Market pressures to move more quickly and develop innovative applications are forcing organizations to rethink how they develop and release applications. The combination of public clouds and physical back-end infrastructures are a means to get applications out faster. However, these hybrid solutions complicate DevOps adoption, with application delivery pipelines that span across complex hybrid cloud and non-cloud environments. Check out this …

  • VMware vCloud® Government Service provided by Carpathia® is an enterprise-class hybrid cloud service that delivers the tried and tested VMware capabilities widely used by government organizations today, with the added security and compliance assurance of FedRAMP authorization. The hybrid cloud is becoming more and more prevalent – in fact, nearly three-fourths of large enterprises expect to have hybrid deployments by 2015, according to a recent Gartner analyst report. Learn about the benefits of …

Most Popular Programming Stories

More for Developers

RSS Feeds