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<TITLE>Menu - Finding a menuitem from command id</TITLE>
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<FONT COLOR="#AOAO99">Finding a menu item position from command id</FONT></H3></CENTER>
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This article was contributed by <A HREF="mailto:jochenr@iait.de">Jochen Ruhland</A> <A HREF="http://www.iait.de">(www.iait.de) </A>.
<h3>Indentify a Menupos based on it's Command-ID</h3>
<p>This is taken from a Doc/View-App that is mostly straight from the
AppWizard of VC5.</p>
<p>I recently got the Problem, that I had to insert Menuitem at a specific
position _below_ a defined MenuItem. Unfortunaletly I found no easy way
to enumerate all item in the menubar, so I had to do it myself. In MFC
there is a func to get the Command-ID if you know the Menu and Position
but no func gives you the Menu and the Menupos from the CommandID :-(</p>
This function will find the first menu item with the given command id looping
through the submenu until it is found.
<h4>It is used like this:</h4>
<pre><tt><font COLOR="#990000">
CWnd* pWnd = AfxGetMainWnd();
CMenu *pMenu = pWnd->GetMenu();
int m_Pos = 0;
CMenu *pmMenu = pMenu;
// Insert the Menuitem ID_DUMPRECORD exactly 2 Positions below FileSaveAs
FindMenuPos( pMenu, ID_FILE_SAVE_AS, pmMenu, m_Pos );
m_Pos += 2;
InsertMenu(pmMenu, m_Pos, MF_BYPOSITION, ID_DUMPRECORD, "Print Record" );
</font></tt></pre>
<h4>with a little Hack for InsertMenu:</h4>
<pre><tt><font COLOR="#990000">
void CMainFrame::InsertMenu(CMenu* pMenu, UINT oldID, int Flags, UINT newID, const char * MenuText)
{
if( pMenu == NULL ) return;
if(pMenu->GetMenuState( newID, Flags) == 0xFFFFFFFF )
pMenu->InsertMenu(oldID, Flags, newID, MenuText );
else
SetMenuState( newID, MF_ENABLED );
}
void CMainFrame::InsertMenu(UINT oldID, int Flags, UINT newID, const char * MenuText)
{
CWnd* pWnd = AfxGetMainWnd();
CMenu *pMenu = pWnd->GetMenu();
InsertMenu(pMenu, oldID, Flags, newID, MenuText);
}
</font></tt></pre>
<p>So that my InsertMenu inserts the MenuItem if it dos not exist, if it exist,
it will be enabled.</p>
<h4>Find a specific Menupos based on the Command-ID</h4>
<p>I havn't cheched it with cascading submenues, but IF MS tells the truth about their
MFC-functions, there should be no problems.</p>
<pre><tt><font COLOR="#990000">
bool CMainFrame::FindMenuPos(CMenu *pBaseMenu, UINT myID, CMenu * & pMenu, int & mpos)
{
// REMARK: pMenu is a pointer to a Cmenu-Pointer
int myPos;
if( pBaseMenu == NULL )
{
// Sorry, Wrong Number
pMenu == NULL;
mpos = -1;
return true;
}
for( myPos = pBaseMenu->GetMenuItemCount() -1; myPos >= 0; myPos-- )
{
int Status = pBaseMenu->GetMenuState( myPos, MF_BYPOSITION);
CMenu* mNewMenu;
if( Status == 0xFFFFFFFF )
{
// That was not an legal Menu/Position-Combination
pMenu = NULL;
mpos = -1;
return true;
}
// Is this the real one?
if( pBaseMenu->GetMenuItemID(myPos) == myID )
{
// Yep!
pMenu = pBaseMenu;
mpos = myPos;
return true;
}
// Maybe a subMenu?
mNewMenu = pBaseMenu->GetSubMenu(myPos);
// This function will return NULL if ther is NO SubMenu
if( mNewMenu != NULL )
{
// rekursive!
bool found = FindMenuPos( mNewMenu, myID, pMenu, mpos);
if(found)
return true; // return this loop
}
// I have to check the next in my loop
}
return false; // iterate in the upper stackframe
}
</font></tt></pre>
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