自学教程：C++ ContentChanged函数代码示例

voidnsHTMLStyleElement::ContentAppended(nsIDocument* aDocument,                                    nsIContent* aContainer,                                    PRInt32 aNewIndexInContainer){  ContentChanged(aContainer);}

voidSVGStyleElement::CharacterDataChanged(nsIDocument* aDocument,                                      nsIContent* aContent,                                      CharacterDataChangeInfo* aInfo){  ContentChanged(aContent);}

GLSLTextEditor::GLSLTextEditor(QWidget* parent)  : QPlainTextEdit (parent){  _highlighter = new GLSLSyntaxHighlighter(document());  _lineNumberArea = new LineNumberArea (this);  connect(this, SIGNAL(blockCountChanged(int)), this, SLOT(UpdateLineNumberAreaWidth(int)));  connect(this, SIGNAL(updateRequest(QRect,int)), this, SLOT(UpdateLineNumberArea(QRect,int)));  connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(HighlightCurrentLine()));  setWordWrapMode(QTextOption::NoWrap);  QTextDocument* doc = document();#ifdef _WIN32  QFont f ("Courier");#else  QFont f ("Monospace");#endif  f.setStyleHint(QFont::Monospace);	f.setPixelSize(11);  doc->setDefaultFont(f);  connect (doc, SIGNAL(contentsChange(int,int,int)), SLOT(on_document_contentChanged (int, int, int)));  connect(doc, SIGNAL(contentsChanged()), this, SIGNAL(ContentChanged()));}

voidHTMLTextAreaElement::CharacterDataChanged(nsIDocument* aDocument,                                          nsIContent* aContent,                                          CharacterDataChangeInfo* aInfo){  ContentChanged(aContent);}

voidnsHTMLTextAreaElement::ContentInserted(nsIDocument* aDocument,                                       nsIContent* aContainer,                                       nsIContent* aChild,                                       PRInt32 aIndexInContainer){  ContentChanged(aChild);}

bool HexView::Redo(){	if(m_pDataSeq->redo())	{		m_nSelectionStart = m_pDataSeq->event_index();		m_nSelectionEnd   = m_pDataSeq->event_length() + m_nSelectionStart;		m_nCursorOffset   = m_nSelectionEnd;		ContentChanged();		return true;	}	else	{		return false;	}}

bool HexView::ForwardDelete(){	if(SelectionSize() > 0)	{		m_pDataSeq->erase(SelectionStart(), SelectionSize());		m_nCursorOffset = SelectionStart();		m_pDataSeq->breakopt();	}	else	{		m_pDataSeq->erase(m_nCursorOffset, 1);	}	m_nSelectionStart = m_nCursorOffset;	m_nSelectionEnd   = m_nCursorOffset;	ContentChanged();	return true;}

void HTMLTextAreaElement::ContentAppended(nsIContent* aFirstNewContent) {  ContentChanged(aFirstNewContent);}

void SVGStyleElement::ContentRemoved(nsIContent* aChild,                                     nsIContent* aPreviousSibling) {  ContentChanged(aChild);}

LRESULT HexView::OnChar(UINT nChar){	if(nChar < 32)		return 0;	if(m_nEditMode == HVMODE_READONLY)	{		MessageBeep(MB_ICONASTERISK);		return 0;	}			if(m_nWhichPane == 0)	// hex column	{		int  cl[4] = { 2, 3, 3, 8 };		int  cb[4] = { 16, 10, 8, 2 };		//int  cw[4] = { 2, 3, 3, 2 };		int  cf = m_nControlStyles & HVS_FORMAT_MASK;		int  val;		BYTE b = 0;		// get data under caret		if(m_nSubItem > 0)		{			b = m_pDataSeq->getlastmodref();		}		else		{			GetData(m_nCursorOffset, &b, 1);		}		// check this is an allowed character		if(cf == HVS_FORMAT_HEX && !isxdigit(nChar) ||		   cf == HVS_FORMAT_DEC && !(nChar >= '0' && nChar <= '9')  ||		   cf == HVS_FORMAT_OCT && !(nChar >= '0' && nChar <= '7')  ||		   cf == HVS_FORMAT_BIN && !(nChar >= '0' && nChar <= '1')		   )		{			MessageBeep(MB_ICONASTERISK);			return 0;		}		int val2;		if(nChar >= 'a')		val2 = nChar - 'a' + 0x0a;		else if(nChar >= 'A')	val2 = nChar - 'A' + 0x0A;		else					val2 = nChar - '0';		int power = 1;		int base  = cb[cf];		for(int i = cl[cf] - 1; i > m_nSubItem; i--)			power *= base;		if(m_nEditMode == HVMODE_INSERT)			b = 0;		val = b;		val = (val / power) % base;		val *= power;		val = b - val;		val += val2 * power;		// check that we won't overflow the underlying value		if(val > 0xff)		{			//MessageBeep(MB_ICONASTERISK);			//return 0;			val -= b % power;		}		if(m_nSubItem++ == 0)		{				b = (BYTE)val;			// enter the data			EnterData(&b, 1, m_nWhichPane == 0 ? false : true, true, false);		}		else		{			// directly edit the byte in the sequence - this			// prevents us from introducing any more spans than necessary			// and keeps this as a single 'byte' edit			m_pDataSeq->getlastmodref() = val;			ContentChanged();			if(m_nSubItem == cl[cf])			{				m_nSubItem = 0;				m_nCursorOffset++;			}						RepositionCaret();		}	}	else	{		BYTE b = nChar;		// ascii column - enter the data as-is		m_nSubItem = 0;		EnterData(&b, 1, true, true, false);//.........这里部分代码省略.........

void FlowTab::EmitContentChanged(){    m_safeToLoad = false;    emit ContentChanged();}