www.pudn.com > c02 vc6.rar > FormatBar.cpp

///////////////////////////////////////////////////////////////////////////// 
// FormatBar.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "RichEdit.h" 
#include "FormatBar.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CFormatBar 
 
// Declare const array of font sizes 
const static int nFontSizes[] =  
	{8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72}; 
 
 
CFormatBar::CFormatBar(UINT nID ) 
{ 
	nToolbarID = nID; 
} 
 
CFormatBar::~CFormatBar() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CFormatBar, CSA3DToolBar) 
	//{{AFX_MSG_MAP(CFormatBar) 
	ON_WM_CREATE() 
	//}}AFX_MSG_MAP 
	ON_CBN_SELENDOK(IDC_FONTNAME, OnSelectFontName) 
	ON_CBN_SELENDOK(IDC_FONTSIZE, OnSelectFontSize) 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CFormatBar message handlers 
 
int CFormatBar::OnCreate(LPCREATESTRUCT lpCreateStruct)  
{ 
	if (CToolBar::OnCreate(lpCreateStruct) == -1) 
		return -1; 
	 
	// Load the toolbar 
	if( !LoadToolBar( nToolbarID ) ) 
		return -1; 
 
 
	// Get the average char width 
	CClientDC dc(this); 
 
	// Determine the size required by the font comboboxes 
	// We will use the DEFAULT_GUI_FONT 
	HGDIOBJ hFont = GetStockObject( DEFAULT_GUI_FONT ); 
	CFont font; 
	font.Attach( hFont ); 
	dc.SelectObject( font ); 
 
	TEXTMETRIC tm; 
	dc.GetTextMetrics( &tm ); 
	int cxChar = tm.tmAveCharWidth; 
	int cyChar = tm.tmHeight + tm.tmExternalLeading; 
 
 
	// Create the Font Name combo 
	CRect rect;  
	GetItemRect( CommandToIndex(IDC_FONTNAME), &rect ); 
	rect.right = rect.left + (LF_FACESIZE+2)*cxChar; 
	rect.bottom = rect.top + 16*cyChar; 
 
	SetButtonInfo( CommandToIndex(IDC_FONTNAME), IDC_FONTNAME,  
				TBBS_SEPARATOR, rect.Width() ); 
 
	UINT nCreateStyle = WS_TABSTOP|WS_VISIBLE|WS_VSCROLL; 
	if (!m_cmbFontName.Create(nCreateStyle|CBS_DROPDOWNLIST|CBS_SORT,  
		rect, this, IDC_FONTNAME)) 
	{ 
		TRACE0("Failed to create Font Name combo-box\n"); 
		return -1; 
	} 
 
 
	// Create Font Size combo 
	GetItemRect( CommandToIndex(IDC_FONTSIZE), &rect ); 
	rect.right = rect.left + 8*cxChar; 
	rect.bottom = rect.top + 16*cyChar; 
 
	SetButtonInfo( CommandToIndex(IDC_FONTSIZE), IDC_FONTSIZE,  
				TBBS_SEPARATOR, rect.Width() ); 
 
	if (!m_cmbFontSize.Create(nCreateStyle|CBS_DROPDOWN|WS_HSCROLL,  
		rect, this, IDC_FONTSIZE)) 
	{ 
		TRACE0("Failed to create Font Size combo-box\n"); 
		return -1; 
	} 
	m_cmbFontSize.LimitText(4); 
 
 
	// Set the font for the combo boxes to DEFAULT_GUI_FONT 
	m_cmbFontName.SetFont(&font); 
	m_cmbFontSize.SetFont(&font); 
 
	// Fill the Font names in the Font Name combo 
	::EnumFontFamilies( dc.m_hDC, NULL, (FONTENUMPROC)EnumFontFamProc,  
				(LPARAM) this ); 
 
	// Fill the Font Size combo 
	CString sSize; 
	int nSizeCount = sizeof(nFontSizes) / sizeof(nFontSizes[0]); 
	for( int i=0; i < nSizeCount; i++ ) 
	{ 
		sSize.Format("%d", nFontSizes[i] ); 
		m_cmbFontSize.AddString( sSize ); 
	} 
 
	return 0; 
} 
 
int CALLBACK CFormatBar::EnumFontFamProc(ENUMLOGFONT *lpelf, NEWTEXTMETRIC *lpntm, 
					int nFontType, LPARAM lParam) 
{ 
	CFormatBar* pWnd = (CFormatBar*)lParam; 
 
	// Add the font name to the combo 
	pWnd->m_cmbFontName.AddString(lpelf->elfLogFont.lfFaceName); 
 
	return 1;		// 1 to continue enumeration 
} 
 
void CFormatBar::OnSelectFontName() 
{ 
	TCHAR szFontName[LF_FACESIZE]; 
	int nIndex = m_cmbFontName.GetCurSel(); 
	m_cmbFontName.GetLBText( nIndex, szFontName ); 
 
	// If font name is empty - return 
	if( szFontName[0] == 0 ) 
		return; 
 
	CHARNMHDR fh; 
	CHARFORMAT& cf = fh.cf; 
	fh.hwndFrom = m_hWnd; 
	fh.idFrom = GetDlgCtrlID(); 
	fh.code = FN_SETFORMAT; 
	cf.dwMask = CFM_FACE; 
 
	_tcsncpy(cf.szFaceName, szFontName, LF_FACESIZE);	//strncpy 
 
	GetOwner()->SendMessage(WM_NOTIFY, fh.idFrom, (LPARAM)&fh); 
} 
 
void CFormatBar::OnSelectFontSize() 
{ 
	TCHAR szSize[5]; 
	int index = m_cmbFontSize.GetCurSel(); 
	if( index != CB_ERR ) 
		m_cmbFontSize.GetLBText(index, szSize ); 
	else 
		m_cmbFontSize.GetWindowText( szSize, 5 ); 
 
	// Get size in Twips 
	int nSize = _ttoi( szSize ) * 20;			// atoi for tchar 
 
	if( !nSize ) 
		return; 
 
	CHARNMHDR fh; 
	CHARFORMAT& cf = fh.cf; 
	fh.hwndFrom = m_hWnd; 
	fh.idFrom = GetDlgCtrlID(); 
	fh.code = FN_SETFORMAT; 
 
	cf.dwMask = CFM_SIZE; 
	cf.yHeight = nSize; 
 
	GetOwner()->SendMessage(WM_NOTIFY, fh.idFrom, (LPARAM)&fh); 
} 
 
void CFormatBar::OnUpdateCmdUI(CFrameWnd* pTarget, BOOL bDisableIfNoHndler) 
{ 
	// Take care of the regular toolbar buttons 
	CToolBar::OnUpdateCmdUI( pTarget, bDisableIfNoHndler); 
 
	// Don't update the combo boxes if user changing font attribute 
	CWnd *pWnd = GetFocus(); 
	if( pWnd == &m_cmbFontName || m_cmbFontSize.IsChild(pWnd) ) 
		return; 
 
	// get the current font from the view and update 
	CHARNMHDR fh; 
	CHARFORMAT& cf = fh.cf; 
	fh.hwndFrom = m_hWnd; 
	fh.idFrom = GetDlgCtrlID(); 
	fh.code = FN_GETFORMAT; 
 
	CWnd *pOwnerWnd = GetOwner(); 
	if( !GetOwner()->SendMessage(WM_NOTIFY, fh.idFrom, (LPARAM)&fh) ) 
	{ 
		TRACE0("The Rich Edit View/Control has to handle the FN_GETFORMAT\n" 
			"notification for the Format Bar to work properly\n"); 
		return; 
	} 
 
	// Update the font only if the selection font is different 
	TCHAR szName[LF_FACESIZE]; 
	m_cmbFontName.GetWindowText( szName, LF_FACESIZE ); 
 
	// the selection must be same font and charset to display correctly 
	if ((cf.dwMask & (CFM_FACE|CFM_CHARSET)) != (CFM_FACE|CFM_CHARSET)) 
		m_cmbFontName.SetCurSel( -1 ); 
	else if( ::_tcscmp( szName, cf.szFaceName ) != 0 ) 
	{ 
		if( m_cmbFontName.SelectString( -1, cf.szFaceName ) == CB_ERR ) 
			m_cmbFontName.SetCurSel( -1 ); 
	} 
 
 
	// Update the font size 
	TCHAR szSize[5]; 
	m_cmbFontSize.GetWindowText( szSize, 5 ); 
	int nSize = _ttoi( szSize );				// atoi for tchar 
 
	// Update the font size only if selection is different  
	int nSelSize = (cf.dwMask & CFM_SIZE) ? cf.yHeight/20 : 0; 
	if( nSize != nSelSize ) 
	{ 
		if(cf.dwMask & CFM_SIZE) 
		{ 
			CString strSize; 
			strSize.Format("%d", nSelSize ); 
			m_cmbFontSize.SetWindowText( strSize ); 
		} 
		else 
			m_cmbFontSize.SetCurSel(-1); 
	} 
} 
 
BOOL CFormatBar::PreTranslateMessage(MSG* pMsg)  
{ 
	if (pMsg->message == WM_KEYDOWN) 
	{ 
		NMHDR nm; 
		nm.hwndFrom = m_hWnd; 
		nm.idFrom = GetDlgCtrlID(); 
		nm.code = NM_RETURN; 
		switch (pMsg->wParam) 
		{ 
		case VK_RETURN: 
			// Send change notification 
			if( m_cmbFontName.IsChild(GetFocus()) ) 
				OnSelectFontName(); 
			else if( m_cmbFontSize.IsChild(GetFocus()) ) 
				OnSelectFontSize(); 
			//Fall through 
		case VK_ESCAPE: 
			GetOwner()->SendMessage(WM_NOTIFY, nm.idFrom, (LPARAM)&nm); 
			return TRUE; 
		} 
	} 
	 
	return CToolBar::PreTranslateMessage(pMsg); 
}