www.pudn.com > print_preview000.rar > TitleTip.cpp

//////////////////////////////////////////////////////////////////////////// 
// TitleTip.cpp : implementation file 
// 
// Code taken from www.codeguru.com. - thanks Zafir! 
// 
// Modifed 10 Apr 1999  Now accepts a LOGFONT pointer and  
//                      a tracking rect in Show(...)  (Chris Maunder) 
//         18 Apr 1999  Resource leak in Show fixed by Daniel Gehriger 
    
 
#include "stdafx.h" 
#include "gridctrl.h" 
 
#ifndef GRIDCONTROL_NO_TITLETIPS 
 
#include "TitleTip.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CTitleTip 
 
CTitleTip::CTitleTip() 
{ 
	// Register the window class if it has not already been registered. 
	WNDCLASS wndcls; 
	HINSTANCE hInst = AfxGetInstanceHandle(); 
	if(!(::GetClassInfo(hInst, TITLETIP_CLASSNAME, &wndcls))) 
	{ 
		// otherwise we need to register a new class 
		wndcls.style			= CS_SAVEBITS; 
		wndcls.lpfnWndProc		= ::DefWindowProc; 
		wndcls.cbClsExtra		= wndcls.cbWndExtra = 0; 
		wndcls.hInstance		= hInst; 
		wndcls.hIcon			= NULL; 
		wndcls.hCursor			= LoadCursor( hInst, IDC_ARROW ); 
		wndcls.hbrBackground	= (HBRUSH)(COLOR_INFOBK + 1);  
		wndcls.lpszMenuName		= NULL; 
		wndcls.lpszClassName	= TITLETIP_CLASSNAME; 
 
		if (!AfxRegisterClass(&wndcls)) 
			AfxThrowResourceException(); 
	} 
} 
 
CTitleTip::~CTitleTip() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CTitleTip, CWnd) 
	//{{AFX_MSG_MAP(CTitleTip) 
	ON_WM_MOUSEMOVE() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
 
///////////////////////////////////////////////////////////////////////////// 
// CTitleTip message handlers 
 
BOOL CTitleTip::Create(CWnd * pParentWnd) 
{ 
	ASSERT_VALID(pParentWnd); 
 
	DWORD dwStyle = WS_BORDER | WS_POPUP;  
	DWORD dwExStyle = WS_EX_TOOLWINDOW | WS_EX_TOPMOST; 
	m_pParentWnd = pParentWnd; 
 
	return CreateEx(dwExStyle, TITLETIP_CLASSNAME, NULL, dwStyle,  
                    CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,  
		            NULL, NULL, NULL ); 
} 
 
 
// Show 		 - Show the titletip if needed 
// rectTitle	 - The rectangle within which the original  
//				    title is constrained - in client coordinates 
// lpszTitleText - The text to be displayed 
// xoffset		 - Number of pixel that the text is offset from 
//				   left border of the cell 
void CTitleTip::Show(CRect rectTitle, LPCTSTR lpszTitleText, int xoffset /*=0*/, 
                     LPRECT lpHoverRect /*=NULL*/, 
                     LPLOGFONT lpLogFont /*=NULL*/) 
{ 
	ASSERT( ::IsWindow( GetSafeHwnd() ) ); 
 
    if (rectTitle.IsRectEmpty()) 
        return; 
 
    m_rectHover = (lpHoverRect != NULL)? lpHoverRect : rectTitle; 
 
	m_pParentWnd->ClientToScreen( m_rectHover ); 
    ScreenToClient( m_rectHover ); 
 
	// If titletip is already displayed, don't do anything. 
	if( IsWindowVisible() )  
		return; 
 
	// Do not display the titletip is app does not have focus 
	if( GetFocus() == NULL ) 
		return; 
 
	// Define the rectangle outside which the titletip will be hidden. 
	// We add a buffer of one pixel around the rectangle 
	m_rectTitle.top    = -1; 
	m_rectTitle.left   = -xoffset-1; 
	m_rectTitle.right  = rectTitle.Width()-xoffset; 
	m_rectTitle.bottom = rectTitle.Height()+1; 
 
	// Determine the width of the text 
	m_pParentWnd->ClientToScreen( rectTitle ); 
 
	CClientDC dc(this); 
	CString strTitle = _T(""); 
    strTitle += _T(" "); 
    strTitle += lpszTitleText;  
    strTitle += _T(" "); 
 
	CFont font, *pOldFont = NULL; 
    if (lpLogFont) 
    { 
        font.CreateFontIndirect(lpLogFont); 
	    pOldFont = dc.SelectObject( &font ); 
    } 
    else 
    { 
        // use same font as ctrl 
	    pOldFont = dc.SelectObject( m_pParentWnd->GetFont() ); 
    } 
 
	CSize size = dc.GetTextExtent( strTitle ); 
 
    TEXTMETRIC tm; 
    dc.GetTextMetrics(&tm); 
    size.cx += tm.tmOverhang; 
 
	CRect rectDisplay = rectTitle; 
	rectDisplay.left += xoffset; 
	rectDisplay.right = rectDisplay.left + size.cx + xoffset; 
     
    // Do not display if the text fits within available space 
    if( rectDisplay.right > rectTitle.right-xoffset ) 
    { 
        // Show the titletip 
        SetWindowPos( &wndTop, rectDisplay.left, rectDisplay.top,  
            rectDisplay.Width(), rectDisplay.Height(),  
            SWP_SHOWWINDOW|SWP_NOACTIVATE ); 
         
        dc.SetBkMode( TRANSPARENT ); 
        dc.TextOut( 0, 0, strTitle ); 
        SetCapture(); 
    } 
     
    dc.SelectObject( pOldFont ); 
} 
 
void CTitleTip::Hide() 
{ 
  	if (!::IsWindow(GetSafeHwnd())) 
        return; 
 
    if (GetCapture()->GetSafeHwnd() == GetSafeHwnd()) 
        ReleaseCapture(); 
 
	ShowWindow( SW_HIDE ); 
} 
 
void CTitleTip::OnMouseMove(UINT nFlags, CPoint point)  
{ 
    if (!m_rectHover.PtInRect(point))  
    { 
        Hide(); 
         
        // Forward the message 
        ClientToScreen( &point ); 
        CWnd *pWnd = WindowFromPoint( point ); 
        if ( pWnd == this )  
            pWnd = m_pParentWnd; 
         
        int hittest = (int)pWnd->SendMessage(WM_NCHITTEST,0,MAKELONG(point.x,point.y)); 
         
        if (hittest == HTCLIENT) { 
            pWnd->ScreenToClient( &point ); 
            pWnd->PostMessage( WM_MOUSEMOVE, nFlags, MAKELONG(point.x,point.y) ); 
        } else { 
            pWnd->PostMessage( WM_NCMOUSEMOVE, hittest, MAKELONG(point.x,point.y) ); 
        } 
    } 
} 
 
BOOL CTitleTip::PreTranslateMessage(MSG* pMsg)  
{ 
	CWnd *pWnd; 
	int hittest; 
	switch (pMsg->message) 
	{ 
	case WM_LBUTTONDOWN: 
	case WM_RBUTTONDOWN: 
	case WM_MBUTTONDOWN: 
		POINTS pts = MAKEPOINTS( pMsg->lParam ); 
		POINT  point; 
		point.x = pts.x; 
		point.y = pts.y; 
		ClientToScreen( &point ); 
		pWnd = WindowFromPoint( point ); 
		if( pWnd == this )  
			pWnd = m_pParentWnd; 
 
		hittest = (int)pWnd->SendMessage(WM_NCHITTEST,0,MAKELONG(point.x,point.y)); 
 
		if (hittest == HTCLIENT) { 
			pWnd->ScreenToClient( &point ); 
			pMsg->lParam = MAKELONG(point.x,point.y); 
		} else { 
			switch (pMsg->message) { 
			case WM_LBUTTONDOWN:  
				pMsg->message = WM_NCLBUTTONDOWN; 
				break; 
			case WM_RBUTTONDOWN:  
				pMsg->message = WM_NCRBUTTONDOWN; 
				break; 
			case WM_MBUTTONDOWN:  
				pMsg->message = WM_NCMBUTTONDOWN; 
				break; 
			} 
			pMsg->wParam = hittest; 
			pMsg->lParam = MAKELONG(point.x,point.y); 
		} 
 
        Hide(); 
		pWnd->PostMessage(pMsg->message,pMsg->wParam,pMsg->lParam); 
		return TRUE;	 
		 
	case WM_KEYDOWN: 
	case WM_SYSKEYDOWN: 
        Hide(); 
		m_pParentWnd->PostMessage( pMsg->message, pMsg->wParam, pMsg->lParam ); 
		return TRUE; 
	} 
 
	if( GetFocus() == NULL ) 
	{ 
        Hide(); 
		return TRUE; 
	} 
 
	return CWnd::PreTranslateMessage(pMsg); 
} 
 
#endif // GRIDCONTROL_NO_TITLETIPS