cbmpmenu.cpp

一个功能挺多的

//
//Modify by 徐景周 2000.10
//功能：条状位图或渐变色菜单显示效果
//

#include "stdafx.h"
#include "CBmpMenu.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBmpMenu
// constructor

CBmpMenu::CBmpMenu(int nBitmapW, BOOL bShowBmp4SubMenu, HBITMAP hBitmap, BOOL bStretchBmp)
{
	//check if hbitmap is a valid handle
	BITMAP bitmap;
	if(GetObject(hBitmap, sizeof(bitmap), &bitmap))
	{
		m_hBitmap   = hBitmap;
	}
	else
	{
		m_hBitmap	= NULL;
	}

	//initialize internal data
	m_bShowBmpAll	= bShowBmp4SubMenu;
	m_pOwnerWnd		= m_pToolbar = 0;
	m_bSubMenu		= FALSE;
	m_pSubMenuWnd	= 0;
	m_bStretchBmp	= bStretchBmp;
	m_nTBOffSet		= nBitmapW; //条状位图或渐变色宽度
}

CBmpMenu::~CBmpMenu()
{
}

IMPLEMENT_DYNAMIC( CBmpMenu, CWnd )

BEGIN_MESSAGE_MAP(CBmpMenu, CWnd)
	//{{AFX_MSG_MAP(CBmpMenu)
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CBmpMenu message handlers

BOOL
CBmpMenu :: Attach( HMENU hMenu )
{
	return CMenu::Attach(hMenu);
}

HMENU
CBmpMenu :: Detach()
{
	return CMenu::Detach();
}


BOOL CBmpMenu::DestroyWindow() 
{
	//Send WM_EXITMENULOOP to the owner window
	m_pOwnerWnd->SendMessage(WM_EXITMENULOOP, FALSE);

	//destroy the current window and set focus to parent if parent is of the same class
	if(::IsWindow(GetParent()->GetSafeHwnd()) && 
		GetParent()->IsKindOf(RUNTIME_CLASS(CBmpMenu)))
	{
		GetParent()->SetFocus();
	}

	return CWnd::DestroyWindow();
}

BOOL
CBmpMenu :: TrackPopupMenu( UINT nFlags, int x, int y, CWnd* pParentWnd, CRect* pItemRect)
{
	//if this is a main menu, then parent window is same as owner window
	if(!m_bSubMenu)
	{
		m_pOwnerWnd = pParentWnd;
	}

	//Send menu messages to owner window
	if(m_pOwnerWnd && IsWindow(m_pOwnerWnd->m_hWnd))
		m_pOwnerWnd->SendMessage(m_bSubMenu?WM_INITMENUPOPUP:WM_INITMENU, (WPARAM)m_hMenu, 0);
	else
		return FALSE;

	//create the main window...child of this will be a toolbar which acts as a kind of menu
	if(!CreateEx(WS_EX_DLGMODALFRAME|WS_EX_PALETTEWINDOW|WS_EX_CONTROLPARENT
					, 0, 0, WS_POPUP|WS_CLIPSIBLINGS|WS_CLIPCHILDREN|WS_BORDER|WS_CHILD, 
					CRect(0,0,0,0), pParentWnd, 0))
		return FALSE;

	//set the data of parent popup menu
	if(m_bSubMenu)
	{
		((CBmpMenu*)GetParent())->m_pSubMenuWnd = this;
	}

	//create toolbar
	m_pToolbar = new MenuToolBar;

	//We add a custom draw toolbar which will act as a menu
	m_pToolbar->CreateEx(this, TBSTYLE_FLAT|TBSTYLE_LIST|TBSTYLE_CUSTOMERASE|TBSTYLE_WRAPABLE,
							WS_CLIPCHILDREN|CCS_NODIVIDER|CCS_NORESIZE|CCS_NOPARENTALIGN|CBRS_TOOLTIPS);

	//Initialize toolbar data and place the menu window on screen
	InitToolBarData(m_pToolbar, CPoint(x,y), pItemRect);

	//show the menu window without activating it....before that make the owner window as foreground window
	if(!m_bSubMenu)
	{
		m_pOwnerWnd->SetForegroundWindow();
	}
	
	ShowWindow(SW_SHOWNA);	

	//capture keyboard input
	SetFocus();

	//if this is a submenu and user had opened it by pressing right arrow key
	if(m_bSubMenu & MENU_SELECTFIRSTITEM)
	{
		m_pToolbar->SendMessage(TB_SETHOTITEM, 0, 0);
	}

	m_bSubMenu &= ~MENU_SELECTFIRSTITEM;

	//send a notification message to owner
	if(m_pOwnerWnd && IsWindow(m_pOwnerWnd->m_hWnd))
		m_pOwnerWnd->SendMessage(WM_ENTERMENULOOP, (WPARAM)m_hMenu, (LPARAM)m_hWnd);

	//run the modal loop so that the menu window acts as a kind of dialog
	RunModalLoop();

	//delete allocated memory and cleanup other stuff
	Cleanup();

	return TRUE;
}
//wp gives a point on which left mouse button was clicked for the parent menu
void CBmpMenu::PopupSubMenu(WPARAM wp, BOOL bSelectFirstItem)
{
	CPoint point(LOWORD(wp), HIWORD(wp));

	//Get the button on which left mouse button was clicked
	int nBtnIndex = (m_pToolbar->GetToolBarCtrl()).HitTest(&point);
	TBBUTTON tbb;
	(m_pToolbar->GetToolBarCtrl()).GetButton(nBtnIndex, &tbb);

/*  
  //得到渐变条显示文字
	MENUITEMINFO *pMIData = (MENUITEMINFO *)tbb.dwData;
	char *pStr = pMIData->dwTypeData;
	CString strTitle;
	while (*pStr) {
		const char c = pStr[0];
		if (c != '&')
			strTitle  += c;
		pStr++;
	};
*/

	//Get window rectangle of this button
	CRect rect;
	(m_pToolbar->GetToolBarCtrl()).GetItemRect(nBtnIndex, &rect);
	(m_pToolbar->GetToolBarCtrl()).ClientToScreen(&rect);

	//Construct popup menu
	CBmpMenu oSubMenu(m_bShowBmpAll?m_nTBOffSet:0, m_bShowBmpAll, m_bShowBmpAll?m_hBitmap:0, m_bStretchBmp);
	
	//可在此设置渐变色条
//	oSubMenu.SetGradientColors(m_Color1, m_Color2, m_ColorText);
//	oSubMenu.SetTitle(strTitle);
	
	//intialize data of popup menu
	oSubMenu.m_pOwnerWnd = m_pOwnerWnd;

	//When user created an instance of CBmpMenu, automatically a handle was associated with root menu
	//when he called loadMenu or CreatePopupMenu. But we are not doing any of it for submenus..so just attach
	//the menu handle of the submenu to this submenu window

	oSubMenu.Attach(((MENUITEMINFO*)(tbb.dwData))->hSubMenu);

	//Set data to indicate whther first item should be set as a hot item
	oSubMenu.m_bSubMenu = TRUE | bSelectFirstItem;

	//Add the blank space with to get bounds rect of this button in root menu
	rect.left -= m_nTBOffSet;

	//Show the submenu window
	oSubMenu.TrackPopupMenu(0, 0, 0, this, &rect);

	//detach the menu handle
	oSubMenu.Detach();
}

void CBmpMenu::InitToolBarData(CToolBar *pToolBar, CPoint pt, CRect* pItemRect)
{
	//enable tooltips
	pToolBar->EnableToolTips(TRUE);

	//set toolbar buutons bitmap size first. This should be equal to checkmark dimensions
	//button size will be automatically calculated by toolbar
	pToolBar->SendMessage(TB_SETBITMAPSIZE, 0, MAKELPARAM(GetSystemMetrics(SM_CXMENUCHECK), GetSystemMetrics(SM_CYMENUCHECK)));

	//for each menu item...add corrsponding buttons to the toolbar
	for(int i=0; i<(int)GetMenuItemCount(); i++)
	{
		MENUITEMINFO	menuInfo, *pMenuInfo;
		TBBUTTON		buttonInfo;
		char			*pszBuffer;

		//initialize
		menuInfo.cbSize = sizeof(menuInfo);
		menuInfo.fMask = MIIM_CHECKMARKS|MIIM_DATA|MIIM_ID|MIIM_STATE|MIIM_SUBMENU|MIIM_TYPE;
		pszBuffer = new char[MAX_PATH];		//buffer for button text
		menuInfo.cch = MAX_PATH;
		menuInfo.dwTypeData = pszBuffer;
		ZeroMemory(&buttonInfo, sizeof(buttonInfo));

		GetMenuItemInfo(i, &menuInfo, TRUE);
		
		if(menuInfo.dwTypeData == 0)
			delete pszBuffer;

		//store the app defined data pointer
		pMenuInfo = new MENUITEMINFO;
		*pMenuInfo = menuInfo;
		buttonInfo.dwData = (ULONG)pMenuInfo;

		//set button info from menuInfo...default state is enabled
		buttonInfo.fsState = TBSTATE_ENABLED|TBSTATE_WRAP;

		//check if its a separator
		if(menuInfo.fType & MFT_SEPARATOR)
		{
			buttonInfo.fsStyle = TBSTYLE_SEP;
		}

		//check if the menu item is disabled or grayed
		if((menuInfo.fState & MF_GRAYED) || (MF_DISABLED & menuInfo.fState))
			buttonInfo.fsState = 0;

		//set button command id
		buttonInfo.idCommand = menuInfo.wID;

		//add the button
		(pToolBar->GetToolBarCtrl()).AddButtons(1, &buttonInfo);

		//Set button text
		if(menuInfo.dwTypeData)
		{
			pToolBar->SetButtonText(i, pszBuffer);
		}
	}

	//Get the button width and add width of arrow mark to be drawn for popup menus
	int nWidth = LOWORD(pToolBar->GetToolBarCtrl().GetButtonSize());
	nWidth += GetSystemMetrics(SM_CXMENUCHECK);
	//add width for showing arrows for submenus
	pToolBar->GetToolBarCtrl().SetButtonWidth(nWidth, nWidth);

	//set the toolbar button size
	CRect rect1, rect2;

	(pToolBar->GetToolBarCtrl()).GetItemRect(0, &rect1);
	//if all the buttons have dropdown arrow...the toolbar returns extra height equal to one row
	(pToolBar->GetToolBarCtrl()).GetItemRect(GetMenuItemCount()-1, &rect2);

	//set the total toolbar size
	//offset of 3 pixels to either side of the toolbar
	//If another control(bitmap or slider) is to be placed by the side of toolbar then we have to take 
	//into account the width of that control=m_nTBOffSet
	//Also we need to check that this window rect lies in the screen rect
	PositionMenuWindow(pt, pItemRect, CRect(0, 0, rect1.Width()+6+m_nTBOffSet, rect2.bottom-rect1.top+6));

	//place the toolbar window in the menu window
	pToolBar->MoveWindow(m_nTBOffSet, 0, rect1.Width()+6, rect2.bottom-rect1.top+6);

	//Show the toolbar window without activating it
	pToolBar->ShowWindow(SW_SHOWNOACTIVATE);
}


LRESULT CBmpMenu::DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam) 
{
	// TODO: Add your specialized code here and/or call the base class
	CWnd*	pWnd = 0;
	BOOL	bFlag = FALSE;

	switch(message)
	{
	case WM_ACTIVATE:
		{
			//Close all menu windows, if another window is being activated because of a mouse click outside menu window
			CWnd oWnd;
			if(lParam && IsWindow(HWND(lParam)) && (LOWORD(wParam) == WA_INACTIVE))
				if(!oWnd.FromHandle(HWND(lParam))->IsKindOf(RUNTIME_CLASS(CBmpMenu)))
					DestroyRootMenu();

			if(!lParam)
				DestroyRootMenu();

			return 0L;
		}
		break;

	case WM_SYSKEYDOWN:
		//destroy root menu when alt or any syskey is pressed
		DestroyRootMenu();
		break;

	case WM_KEYDOWN:
		//pass the keydown event to toolbar
		//If a submenu is being shown for this menu, then key down should be handled by submenu window
		//else pass it to toolbar
		if(m_pSubMenuWnd)
			m_pSubMenuWnd->SendMessage(WM_KEYDOWN, wParam, lParam);
		else
			m_pToolbar->SendMessage(WM_KEYDOWN, wParam, lParam);
		return 0L;

	case WM_RESETDATA:
		//User defined message to be sent to toolbar to reinitialize internal data
		m_pToolbar->SendMessage(WM_RESETDATA, 0, 0);
		return 0L;

	case WM_COMMAND:
		//pass on control specific messages(if any) to owner window
		m_pOwnerWnd->PostMessage(WM_COMMAND, wParam, lParam);
		return 0L;

	case WM_POPUPSUBMENU:
		//popup the submenu
		PopupSubMenu(wParam, lParam);
		return 0L;
	}

	return CWnd::DefWindowProc(message, wParam, lParam);
}

//destroys all menu window
void CBmpMenu::DestroyRootMenu()
{
	if(m_hWnd && IsWindow(m_hWnd))
	{
		CWnd *pParent = GetParent();

		if(pParent && IsWindow(pParent->m_hWnd))
		{
			if(pParent->IsKindOf(RUNTIME_CLASS(CBmpMenu)))
				((CBmpMenu*)pParent)->DestroyRootMenu();	
		}

		if(m_hWnd && IsWindow(m_hWnd))
		{
			DestroySubMenus();

			//end the modal loop started using RunModalLoop in TrackPopupMenu function
			EndModalLoop(0);

			m_pSubMenuWnd = 0;
		}
	}
}

//destroy all the submenu window associated with this menu
void CBmpMenu::DestroySubMenus()
{
	if(m_pSubMenuWnd)
	{
		m_pSubMenuWnd->DestroySubMenus();

		//end the modal loop started using RunModalLoop in TrackPopupMenu function
		m_pSubMenuWnd->EndModalLoop(0);

		m_pSubMenuWnd = 0;
	}
}

void CBmpMenu::Cleanup()
{
	//remove all allocated memory
	if(m_pToolbar && IsWindow(m_pToolbar->m_hWnd))
	{
		for(int i = 0; i<(m_pToolbar->GetToolBarCtrl()).GetButtonCount(); i++)
		{
			TBBUTTON tbb;
			(m_pToolbar->GetToolBarCtrl()).GetButton(i, &tbb);
			if(tbb.dwData)
			{
				if(((MENUITEMINFO*)(tbb.dwData))->dwTypeData)
					delete (char*)(((MENUITEMINFO*)(tbb.dwData))->dwTypeData);
				delete (MENUITEMINFO*)(tbb.dwData);
				tbb.dwData = 0;
			}
		}

		//destroy our windows
		m_pToolbar->DestroyWindow();
		delete m_pToolbar;
		m_pToolbar = 0;
	}

	if(IsWindow(m_hWnd))
		DestroyWindow();
}

BOOL CBmpMenu::PreCreateWindow(CREATESTRUCT& cs) 
{
	// TODO: Add your specialized code here and/or call the base class

	BOOL bRet = CWnd::PreCreateWindow(cs);

	WNDCLASS wc; 

	::GetClassInfo(AfxGetInstanceHandle(), cs.lpszClass, &wc);

	//register new class with same info but different class
	wc.lpszClassName = cs.lpszClass = "BitmapMenu";

	AfxRegisterClass(&wc);

	return bRet;
}


void CBmpMenu::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	CRect rect;
	GetClientRect(&rect);

/*
    //可在在此处画渐变条
	CRect rect2 = rect;
	rect2.right = m_nTBOffSet;
	PaintGradiantRect(&dc, rect2, m_Color1, m_Color2, false, true);

	// Initialize fonts:
	LOGFONT lf;
	memset (&lf, 0, sizeof (LOGFONT));
	
	
	// Text will be rotated counter-clockwise 90 degrees.
	lf.lfOrientation = lf.lfEscapement = 900;
	
	// We need a TrueType font to get rotated text.  MS Sans //Serif won't cut it!
	lstrcpy ( lf.lfFaceName, _T("Arial") );
	
	lf.lfHeight = 14;
	lf.lfWeight = FW_DEMIBOLD;
	lf.lfItalic = TRUE;
	
	// Create a font with the tweaked attributes.
	CFont font;