coolmenu.cpp

一个很好的富文本编辑程序,类似于windows中的写字板但并不同

////////////////////////////////////////////////////////////////
// CoolMenu 1997 Microsoft Systems Journal. 
// If this code works, it was written by Paul DiLascia.
// If not, I don't know who wrote it.
//
// ==========================================================================  
// HISTORY:	  
// ==========================================================================
//		1.01	13 Aug 1998 - Andrew Bancroft [[e-mail]] - Since we've already 
//							  added the entire toolbar to the imagelist we need to 
//							  increment nNextImage even if we didn't add this button to 
//							  m_mapIDtoImage in the LoadToolbar() method.
//		1.01a	13 Aug 1998	- Peter Tewkesbury - Added AddSingleBitmap(...)
//							  method for adding a single bitmap to a pulldown
//							  menu item.
//		1.02	13 Aug 1998 - Omar L Francisco - Fixed bug with lpds->CtlType
//							  and lpds->itemData item checking.
//		1.03	12 Nov 1998	- Fixes debug assert in system menu. - Wang Jun
//		1.04	17 Nov 1998 - Fixes debug assert when you maximize a view - Wang Jun
//							  window, then try to use the system menu for the view.
//		1.05	09 Jan 1998 - Seain B. Conover [[e-mail]] - Fix for virtual 
//							  key names.
//		1.06	24 Feb 1999 - Michael Lange [[e-mail]] - Fix for memory 
//							  leak in CMyItemData structure, added a destructor that 
//							  calls text.Empty().
//							- Boris Kartamishev [[e-mail]] - Fix for resource
//							  ID bug.
//							- Jeremy Horgan [[e-mail]] - During 
//							  accelerator key processing OnInitMenuPopup() calls 
//							  ConvertMenu() which allocates a new CMyItemData for each 
//						      menu item. This is memory is normally freed by a call to 
//						      OnMenuSelect(), which is not called when processing 
//							  accelerator keys. This results in a memory leak. This was
//							  fixed by modifying the ~CCoolMenuManager() destructor.
//		1.07	24 Feb 1999 - Koji MATSUNAMI [[e-mail]] - Fixed problem with 
//							  popup menus being drawn correctly as cool menus.
// ==========================================================================
//
/////////////////////////////////////////////////////////////////////////////

#include "StdAfx.h"
#include "CoolMenu.h"

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

// helpers
void PLFillRect(CDC& dc, const CRect& rc, COLORREF color);
void PLDrawEmbossed(CDC& dc, CImageList& il, int i,
	CPoint p, BOOL bColor=FALSE);
HBITMAP PLLoadSysColorBitmap(LPCTSTR lpResName, BOOL bMono=FALSE);
inline HBITMAP PLLoadSysColorBitmap(UINT nResID, BOOL bMono=FALSE) {
	return PLLoadSysColorBitmap(MAKEINTRESOURCE(nResID), bMono);
}

// if you want to see extra TRACE diagnostics, set below to TRUE
BOOL CCoolMenuManager::bTRACE = FALSE;
#define safe_delete(p){if(p){delete p;p=NULL;}}

#ifdef _DEBUG
#define CMTRACEFN			\
	CTraceFn __fooble;	\
	if (bTRACE)				\
		TRACE
#define CMTRACE			\
	if (bTRACE)				\
		TRACE
#else
#define CMTRACEFN TRACE
#define CMTRACE   TRACE
#endif

// constants used for drawing
const CXGAP = 1;				// num pixels between button and text
const CXTEXTMARGIN = 1;//2;		// num pixels after hilite to start text
const CXBUTTONMARGIN = 2;//2;	// num pixels wider button is than bitmap
const CYBUTTONMARGIN = 2;//2;	// ditto for height

// DrawText flags
const DT_MYSTANDARD = DT_SINGLELINE|DT_LEFT|DT_VCENTER;

// identifies owner-draw data as mine
const LONG MYITEMID = MAKELONG(MAKEWORD(_T('m'),_T('i')),MAKEWORD(_T('d'),_T('0')));

// private struct: one of these for each owner-draw menu item
struct CMyItemData {
	long		magicNum;		// magic number identifying me
	CString	text;				// item text
	UINT		fType;			// original item type flags
	int		iButton;			// index of button image in image list
	CMyItemData()				{ magicNum = MYITEMID; }
	~CMyItemData()				{ text.Empty(); }
	BOOL IsMyItemData()		{ return magicNum == MYITEMID; }
};

IMPLEMENT_DYNAMIC(CCoolMenuManager, CSubclassWnd)

CCoolMenuManager::CCoolMenuManager()
{
	m_szBitmap = m_szButton = CSize(0,0);	// will compute later
	m_bShowButtons = TRUE;						// show buttons by default
	m_bAutoAccel = TRUE;							// auto accelerators by default
	m_hAccel = NULL;								// no accelerators loaded yet
	m_pAccel = NULL;								// no accelerators loaded yet
	m_bUseDrawState = FALSE;					// use DrawEmbossed by default
	m_bDrawDisabledButtonsInColor = FALSE;	// use color for disabled buttons
	FixMFCDotBitmap();
}

CCoolMenuManager::~CCoolMenuManager()
{
	// Jeremy Horgan [[e-mail]]

	while (!m_menuList.IsEmpty()) 
	{
		ConvertMenu(CMenu::FromHandle((HMENU)m_menuList.RemoveHead()),0,     
			FALSE, FALSE);
	}
	
	Destroy();
}

//////////////////
// Destroy everything. Called from destructor and Refresh.
//
void CCoolMenuManager::Destroy()
{
	m_ilButtons.DeleteImageList();
	m_mapIDtoImage.RemoveAll();
	m_szBitmap = m_szButton = CSize(0,0);
	m_arToolbarID.RemoveAll();
	m_fontMenu.DeleteObject();
	DestroyAccel();
}

/////////////////
// Destroy accelerators
//
void CCoolMenuManager::DestroyAccel()
{
	m_mapIDtoAccel.RemoveAll();		// delete ACCEL entries in map
	safe_delete(m_pAccel);			// delete current accelerators
}

//////////////////
// Call this to install the menu manager. Install(NULL) to un-install.
//
void CCoolMenuManager::Install(CFrameWnd* pFrame)
{
	ASSERT_VALID(pFrame);
	m_pFrame = pFrame;
	HookWindow(pFrame);   // install message hook
}

//////////////////
// Load array of toolbar IDs.
//
BOOL CCoolMenuManager::LoadToolbars(const UINT* arID, int n)
{
	ASSERT(arID);
	BOOL bRet = TRUE;
	for (int i=0; i<n; i++)
		bRet |= LoadToolbar(arID[i]);
	return bRet;
}

// structure of RT_TOOLBAR resource
struct TOOLBARDATA {
	WORD wVersion;		// version # should be 1
	WORD wWidth;		// width of one bitmap
	WORD wHeight;		// height of one bitmap
	WORD wItemCount;	// number of items
	WORD items[1];		// array of command IDs, actual size is wItemCount
};

//////////////////
// Load one toolbar. Assumes bg color is gray.
// 
//  * add toolbar bitmap to image list
//	 * add each button ID to button map
//
BOOL CCoolMenuManager::LoadToolbar(UINT nIDToolbar)
{
	// load bitmap
	HBITMAP hbmToolbar = PLLoadSysColorBitmap(nIDToolbar);
	if (!hbmToolbar) {
		TRACE(_T("*** Can't load bitmap for toolbar %d!\n"), nIDToolbar);
		return FALSE;
	}
	CBitmap bmToolbar;
	bmToolbar.Attach(hbmToolbar); // destructor will detach & destroy

	// load toolbar
	LPTSTR lpResName = MAKEINTRESOURCE(nIDToolbar);
	HINSTANCE hInst;
	HRSRC hRsrc;
	TOOLBARDATA* ptbd;
	if ((hInst= AfxFindResourceHandle(lpResName, RT_TOOLBAR)) == NULL ||
		 (hRsrc= FindResource(hInst, lpResName, RT_TOOLBAR))   == NULL ||
		 (ptbd = (TOOLBARDATA*)LoadResource(hInst, hRsrc))     == NULL) {

		TRACE(_T("*** Can't load toolbar %d!\n"), nIDToolbar);
		return FALSE;
	}
	ASSERT(ptbd->wVersion==1);
		
	// OK, I have the bitmap and toolbar. 

	CSize sz(ptbd->wWidth, ptbd->wHeight);
	if (m_szBitmap.cx==0) {
		// First toolbar: initialized bitmap/button sizes and create image list.
		m_szBitmap = sz;
		m_szButton = sz + CSize(CXBUTTONMARGIN<<1, CYBUTTONMARGIN<<1);
		VERIFY(m_ilButtons.Create(sz.cx, sz.cy, ILC_MASK, 0, 10));

	} else if (m_szBitmap != sz) {
		// button sizes different -- oops
		TRACE(_T("*** Toolbar %d button size differs!\n"), nIDToolbar);
		return FALSE;
	}

	// I have a good toolbar: now add bitmap to the image list, and each
	// command ID to m_mapIDtoImage array. Note that LoadSysColorBitmap will
	// change gray -> COLOR_3DFACE, so use that for image list background.
	//
	int iNextImage = m_ilButtons.GetImageCount();
	m_ilButtons.Add(&bmToolbar, GetSysColor(COLOR_3DFACE));
	for (int i = 0; i < ptbd->wItemCount; i++) {
		UINT nID = ptbd->items[i];
		if (nID > 0) {
			if (GetButtonIndex(nID) >= 0) {
				TRACE(_T("*** Duplicate button ID %d ignored\n"), nID);
			} else {
				m_mapIDtoImage.SetAt(nID, (void*)iNextImage);
				TRACE(_T("CCoolMenuManager::LoadToolbar(). Added Menu Id %d, Button Number %d\n"), nID, iNextImage-1);
			}
			// AB. 13-08-98. Since we've already added the entire toolbar to the imagelist
			// we need to increment nNextImage even if we didn't add this button to
			// m_mapIDtoImage.
			iNextImage++;
		}
	}
	m_arToolbarID.Add(nIDToolbar);  // remember toolbar ID for Refresh
	bmToolbar.Detach();
	return TRUE; // success!
}

//////////////////
// Virtual CSubclassWnd window proc. All messages come here before frame
// window. Isn't it cool? Just like in the old days!
//
LRESULT CCoolMenuManager::WindowProc(UINT msg, WPARAM wp, LPARAM lp)
{
	switch(msg) {
	case WM_SYSCOLORCHANGE:
	case WM_SETTINGCHANGE:
		Refresh();
		break;

	case WM_MEASUREITEM:
		if (OnMeasureItem((MEASUREITEMSTRUCT*)lp))
			return TRUE; // handled
		break;

	case WM_DRAWITEM:
		if (OnDrawItem((DRAWITEMSTRUCT*)lp))
			return TRUE; // handled
		break;

	case WM_INITMENUPOPUP:
		// Very important: must let frame window handle it first!
		// Because if someone calls CCmdUI::SetText, MFC will change item to
		// MFT_STRING, so I must change back to MFT_OWNERDRAW.
		//
		CSubclassWnd::WindowProc(msg, wp, lp);
		OnInitMenuPopup(CMenu::FromHandle((HMENU)wp),
			(UINT)LOWORD(lp), (BOOL)HIWORD(lp));
		return 0;

	case WM_MENUSELECT:
		OnMenuSelect((UINT)LOWORD(wp), (UINT)HIWORD(wp), (HMENU)lp);
		break;

	case WM_MENUCHAR:
		LRESULT lr = OnMenuChar((TCHAR)LOWORD(wp), (UINT)HIWORD(wp),
			CMenu::FromHandle((HMENU)lp));
		if (lr!=0)
			return lr;
		break;
	}
	return CSubclassWnd::WindowProc(msg, wp, lp);
}

//////////////////
// Refresh all colors, fonts, etc. For WM_SETTINGCHANGE, WM_SYSCOLORCHANGE.
//
void CCoolMenuManager::Refresh()
{
	// first copy list (array) of toolbar IDs now loaded.
	CUIntArray arToolbarID;
	arToolbarID.Copy(m_arToolbarID);

	// destroy everything
	Destroy();

	// re-load toolbars.
	int nToolbars = arToolbarID.GetSize();
	for (int i = 0; i < nToolbars; i++)
		LoadToolbar(arToolbarID[i]);
}

//////////////////
// Get menu font, creating if needed
//
CFont* CCoolMenuManager::GetMenuFont()
{
	if (!(HFONT)m_fontMenu) {
		NONCLIENTMETRICS info;
		info.cbSize = sizeof(info);
		SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(info), &info, 0);
		VERIFY(m_fontMenu.CreateFontIndirect(&info.lfMenuFont));
	}
	return &m_fontMenu;
}

//////////////////
// Handle WM_MEASUREITEM on behalf of frame: compute menu item size.
//
BOOL CCoolMenuManager::OnMeasureItem(LPMEASUREITEMSTRUCT lpms)
{
	ASSERT(lpms);
	CMyItemData* pmd = (CMyItemData*)lpms->itemData;
	ASSERT(pmd);
	if (lpms->CtlType != ODT_MENU || !pmd->IsMyItemData())
		return FALSE; // not handled by me

	if (pmd->fType & MFT_SEPARATOR) {
		// separator: use half system height and zero width
		lpms->itemHeight = GetSystemMetrics(SM_CYMENU)>>1;
		lpms->itemWidth  = 0;

	} else {

		// compute size of text: use DrawText with DT_CALCRECT

		CWindowDC dc(NULL);	// screen DC--I won't actually draw on it
		CRect rcText(0,0,0,0);
		CFont* pOldFont = dc.SelectObject(GetMenuFont());
		dc.DrawText(pmd->text, rcText, DT_MYSTANDARD|DT_CALCRECT);
		dc.SelectObject(pOldFont);

		// height of item is just height of a standard menu item
		lpms->itemHeight= max(GetSystemMetrics(SM_CYMENU), rcText.Height());

		// width is width of text plus a bunch of stuff
		int cx = rcText.Width();	// text width 
		cx += CXTEXTMARGIN<<1;		// L/R margin for readability
		cx += CXGAP;					// space between button and menu text