menuex.cpp

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#include "stdafx.h"
#include "MenuEx.h"

IMPLEMENT_DYNAMIC( CMenuEx, CMenu )

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CMenuEx::CMenuEx()
{
	m_bPopupMenu=FALSE;					// initialize this menu flag
										// FALSE indicate this menu is top-level menu
										// TRUE means this menu is popupmenu

	m_nSeparator = 10;					// separator menu item 's height

	// initialize color attribute
	m_crBackground = ::GetSysColor(COLOR_MENU);	
	m_crText =::GetSysColor(COLOR_MENUTEXT);
	m_crTextSelected =::GetSysColor(COLOR_MENUTEXT);
	m_crLeft=RGB(236,233,216);
	m_crSelectedBroder=RGB(49,106,197);
	m_crSelectedFill=RGB(200,220,253);

	// no normal imagelist
	m_pImageList=NULL;					
	m_pDisabledImageList=NULL;			
	m_pHotImageList=NULL;		
	
	// default menu image size
	m_szImage=CSize(20,20);				
}
/////////////////////////////////////////////////////////////////////////////
CMenuEx::~CMenuEx()
{	
	// destroy menu and free all variable
	DestroyMenu();	
}
/////////////////////////////////////////////////////////////////////////////

BOOL CMenuEx::DestroyMenu()
{	
	// delete all imagelist
	if(m_pImageList!=NULL)
		m_pImageList->DeleteImageList();

	if(m_pDisabledImageList!=NULL)
		m_pDisabledImageList->DeleteImageList();

	if(m_pHotImageList!=NULL)
		m_pHotImageList->DeleteImageList();		


	for(int i = 0; i < m_MenuItemArr.GetSize(); i++)
	{
		MENUITEM *pMenuItem = m_MenuItemArr.GetAt(i);
		
		// destroy submenu
		if(pMenuItem->bIsSubMenu)
			pMenuItem->pSubMenu->DestroyMenu(); 		
		
		// remove menu item from array
		m_MenuItemArr.RemoveAt(i);
		
		// free menuitem struct
		delete pMenuItem;
	}	
	return CMenu::DestroyMenu();
}
/////////////////////////////////////////////////////////////////////////////
BOOL CMenuEx::LoadMenu(UINT nIDResource)
{
	// load menu from menu editor created resouce
	CMenu Menu;
	Menu.LoadMenu(nIDResource);

	// empty all variable
	if(m_hMenu!=NULL)	
		DestroyMenu();	
		
	if(m_bPopupMenu)
	{
		// create popupmenu
		if(!CreatePopupMenu()) 
			return FALSE;	
	}
	else
	{
		// create top-level menu  
		if(!CreateMenu()) 
			return FALSE; 
	}		
	return LoadMenu(Menu);
}
/////////////////////////////////////////////////////////////////////////////
BOOL CMenuEx::LoadMenu(HMENU hMenu)
{
	// load menu from global HMENU handle
	CMenu Menu;
	Menu.Attach(hMenu);
	
	// empty all variable
	if(m_hMenu!=NULL)	
		DestroyMenu();	
	
	if(m_bPopupMenu)
	{
		// create popupmenu
		if(!CreatePopupMenu()) 
			return FALSE;	
	}
	else
	{
		// create top-level menu  
		if(!CreateMenu()) 
			return FALSE; 
	}	
	return LoadMenu(Menu);
}
/////////////////////////////////////////////////////////////////////////////
BOOL CMenuEx::LoadMenu(LPCTSTR lpszResourceName)
{
	// load menu from resource string
	CMenu Menu;
	Menu.LoadMenu(lpszResourceName);
	
	// empty all variable
	if(m_hMenu!=NULL)	
		DestroyMenu();	
	
	if(m_bPopupMenu)
	{
		// create popupmenu
		if(!CreatePopupMenu()) 
			return FALSE;	
	}
	else
	{
		// create top-level menu  
		if(!CreateMenu()) 
			return FALSE; 
	}	
	return LoadMenu(Menu);
}
/////////////////////////////////////////////////////////////////////////////
BOOL CMenuEx::LoadMenu(CMenu& Menu)
{	
	UINT nID;
	UINT nIndex;	
	UINT nState;
	CString strMenu;

	// fill this menu use temp menu
	for(nIndex = 0; nIndex < Menu.GetMenuItemCount(); nIndex++)
	{		
		nID=Menu.GetMenuItemID(nIndex);					// get menu ID
		nState=Menu.GetMenuState(nIndex,MF_BYPOSITION);	// get menu state
		Menu.GetMenuString(nIndex,strMenu,MF_BYPOSITION);// get menu name
		
		if(nID==0)
		{	
			// insert separator
			if(!AppendMenu(MF_SEPARATOR))
				return FALSE;
		}
		else if(nID==-1)
		{
			// bypass popupmenu's item number	
			nState&=0x00FFL;	
			
			// insert popupmenu
			if(!AppendMenu(MF_POPUP|nState,(UINT)Menu.GetSubMenu(nIndex)->Detach(),strMenu))
				return FALSE;
		}
		else
		{		
			// insert normal menu item
			if(!AppendMenu(MF_STRING|nState,nID,strMenu))
				return FALSE;
		}
	}		
	return TRUE;
}
/////////////////////////////////////////////////////////////////////////////
BOOL CMenuEx::AppendMenu(UINT nFlags, UINT nIDNewItem, LPCTSTR lpszNewItem )
{	
	// append ownerdrawn style menu item to this menu
	// get last position of this menu
	UINT nIndex=m_MenuItemArr.GetSize();
	
	// insert menu item to last position
	// means append menu item
	return InsertMenu(nIndex,nFlags|MF_BYPOSITION,nIDNewItem,lpszNewItem);	
}

/////////////////////////////////////////////////////////////////////////////
BOOL CMenuEx::InsertMenu(UINT nPosition, UINT nFlags, UINT nIDNewItem , LPCTSTR lpszNewItem )
{
	// insert menu item to specific position or command ID
	LPMENUITEM pMenuItem;
	UINT nIndex;
	CSize  size;	
	
	// mainframe's device context,use to get text size
	CDC	 *pDC =AfxGetMainWnd()->GetDC();

	if(nFlags & MF_BYPOSITION)
	{
		// insert menu item by position
		pMenuItem=new MENUITEM;

		if(nFlags&MF_SEPARATOR)
		{
			// insert separator
			pMenuItem->strText = "";						// no name
			pMenuItem->nID = 0;								// separator's ID
			pMenuItem->itemSize=CSize(0,m_nSeparator);		// separator's default size
			pMenuItem->pImageList=NULL;						// separator has no image
			pMenuItem->pDisabledImageList=NULL;
			pMenuItem->pHotImageList=NULL;
			pMenuItem->nImageIndex=-1;
			pMenuItem->bIsSubMenu=FALSE;					// separator must not be popupmenu
			pMenuItem->pSubMenu=NULL;				
			
			// insert menu item to this menu
			if(!CMenu::InsertMenu(nPosition,nFlags,nIDNewItem,lpszNewItem))
			{
				delete pMenuItem;
				AfxGetMainWnd()->ReleaseDC(pDC);
				return FALSE;
			}
			
			if(m_bPopupMenu)
			{			
				// modify menu item to ownerdrawn style
				// if this menu is not a top-level menu
				if(!CMenu::ModifyMenu(nPosition,MF_SEPARATOR|MF_BYPOSITION|MF_OWNERDRAW,0,(LPCTSTR)pMenuItem))
				{
					delete pMenuItem;
					AfxGetMainWnd()->ReleaseDC(pDC);
					return FALSE;
				}
			}			
			// insert menu item to array
			m_MenuItemArr.InsertAt(nPosition,pMenuItem);
		}
		else if(nFlags&MF_POPUP)
		{
			// insert popupmenu
			CMenuEx* pSubMenu=new CMenuEx;

			// create new popupmenu
			pSubMenu->SetPopupMenu(TRUE);

			// load popupmenu from specific handle
			pSubMenu->LoadMenu((HMENU)nIDNewItem);
			size=pDC->GetTextExtent(lpszNewItem);

			pMenuItem->strText = lpszNewItem;
			pMenuItem->nID = -1;	
			
			// specified menu item size,do not include image's size
			pMenuItem->itemSize.cx=size.cx+25;
			pMenuItem->itemSize.cy=2;
			
			// specified all imagelist for new menu item
			pMenuItem->pImageList=m_pImageList;		
			pMenuItem->pDisabledImageList=m_pDisabledImageList;
			pMenuItem->pHotImageList=m_pHotImageList;
			pMenuItem->nImageIndex=-1;
			pMenuItem->bIsSubMenu=TRUE;
			pMenuItem->pSubMenu=pSubMenu;		// popupmenu's pointor				
			
			if(!CMenu::InsertMenu(nPosition,nFlags,(UINT)(pSubMenu->m_hMenu),lpszNewItem))
			{
				delete pMenuItem;
				AfxGetMainWnd()->ReleaseDC(pDC);
				return FALSE;
			}
			
			if(m_bPopupMenu)
			{			
				if(!CMenu::ModifyMenu(nPosition,nFlags|MF_POPUP|MF_BYPOSITION|MF_OWNERDRAW,(UINT)(pSubMenu->m_hMenu),(LPCTSTR)pMenuItem))
				{
					delete pMenuItem;
					AfxGetMainWnd()->ReleaseDC(pDC);
					return FALSE;
				}
			}			
			m_MenuItemArr.InsertAt(nPosition,pMenuItem);
		}
		else // if(nFlags & MF_STRING)
		{
			// insert normal menu item
			size=pDC->GetTextExtent(lpszNewItem);

			pMenuItem->strText = lpszNewItem;
			pMenuItem->nID = nIDNewItem;			
			pMenuItem->itemSize.cx=size.cx+10;
			pMenuItem->itemSize.cy=2;		
			pMenuItem->pImageList=m_pImageList;		
			pMenuItem->pDisabledImageList=m_pDisabledImageList;
			pMenuItem->pHotImageList=m_pHotImageList;
			pMenuItem->nImageIndex=-1;
			pMenuItem->bIsSubMenu=FALSE;
			pMenuItem->pSubMenu=NULL;					
			
			if(!CMenu::InsertMenu(nPosition,nFlags,nIDNewItem,lpszNewItem))
			{
				delete pMenuItem;
				AfxGetMainWnd()->ReleaseDC(pDC);
				return FALSE;
			}			
			if(m_bPopupMenu)
			{			
				if(!CMenu::ModifyMenu(nPosition,MF_BYPOSITION|MF_OWNERDRAW,nIDNewItem,(LPCTSTR)pMenuItem))
				{
					delete pMenuItem;
					AfxGetMainWnd()->ReleaseDC(pDC);
					return FALSE;
				}
			}
			m_MenuItemArr.InsertAt(nPosition,pMenuItem);
		}			
		return TRUE;
	}
	else if(nFlags & MF_BYCOMMAND)		// insert menu item by command ID
	{		
		for(nIndex = 0; nIndex < (UINT)m_MenuItemArr.GetSize(); nIndex++)
		{
			pMenuItem=m_MenuItemArr.GetAt(nIndex);
			
			// insert menu item with position
			// if the position match command ID
			if(pMenuItem->nID == nPosition)
				return InsertMenu(nIndex,MF_BYPOSITION,nIDNewItem,lpszNewItem);					
		}

		// do not found menu item in this menu
		CMenuEx* pSubMenu=FindPopupMenuFromID(nPosition);

		if(pSubMenu==NULL)
		{
			// not found 
			AfxGetMainWnd()->ReleaseDC(pDC);
			return FALSE;
		}
		else
		{
			// insert menu item to submenu
			return pSubMenu->InsertMenu(nPosition,nFlags,nIDNewItem ,lpszNewItem);
		}		
	}	

	AfxGetMainWnd()->ReleaseDC(pDC);
	return FALSE;
}
/////////////////////////////////////////////////////////////////////////////

BOOL CMenuEx::RemoveMenu(UINT nPosition, UINT nFlags)
{	
	UINT nIndex;
	LPMENUITEM pMenuItem;

	// remove menu item by position
	if(nFlags & MF_BYPOSITION)
	{
		// position out of range of menu item array
		if(nPosition>(UINT)(m_MenuItemArr.GetSize()-1))
			return FALSE;

		// remove menu item from menu item array
		m_MenuItemArr.RemoveAt(nPosition);
				
		// remvoe menu item from this menu
		if(!CMenu::RemoveMenu(nPosition,nFlags))
			return FALSE;
	}
	else if(nFlags & MF_BYCOMMAND)
	{
		// remove menu item by command ID