QTextEdit height using Qt3.3.5

[vermarajeev]

Hi All,
This is a simple problem but I'm having tough time to solve this.

My Problem::::
I have a QTextEdit, where the user can input text in it. Now I want to fix the number of lines say by 14. ie. I need to fix the contents height for QTextEdit. There should not be a scrollView and its contents should not move up/down. I have tried out the solution but is unable to fix the contents height

Here is what I have done

//header.cpp
ChemHeader::ChemHeader(QWidget* parent, const char* name )
:QFrame ( parent, name )
{	
	setBackgroundColor(Qt::white);
	_headerText = new QTextEdit(this);	
 
	_headerLabel = new QLabel(this);
	_headerLabel->setText("Header");
	_headerLabel->setBackgroundColor(Qt::white);
	_headerText->setFocus();
	QRect rec = frameRect();
	QPoint p= rec.topLeft();
	_headerLabel->setGeometry(p.x()+10, p.y(), 45, 10);	
 
	QRect labelRect = _headerLabel->geometry();
	QPoint pp = labelRect.bottomLeft();
 
	_headerText->setGeometry(p.x(), pp.y()+3, width(),height()-_headerLabel->height()-20);		
 
	_headerText->setHScrollBarMode(QScrollView::AlwaysOff);	
	_headerText->setWrapPolicy ( QTextEdit::AtWordOrDocumentBoundary );
	connect(_headerText, SIGNAL(textChanged()), this, SLOT( slotHeaderTextChanged())); 
 
	_headerNoOfLines = 2;				
	_headerMaxHeight = parent->height()/3;	
                 //set Maximum height
	_headerText->setMaximumHeight(_headerMaxHeight);
}
 
ChemHeader::~ChemHeader()
{}
 
//_headerText  is a QTextEdit
void ChemHeader::slotHeaderTextChanged()
{	
	int noOfLines = _headerText->lines();
 
	QFont f = _headerText->currentFont();
	QFontMetrics fm(f);
	int ht = fm.height();
	if(noOfLines > _headerNoOfLines)
	{
		#ifdef _WIN32
			resize(width(), height()+(ht) );
		#else
			resize(width(), height()+(ht+1) );
		#endif		
		_headerText->resize(width(), height() -_headerLabel->height()-2);
		_headerNoOfLines = noOfLines;		
	}
	else if( _headerNoOfLines > 2 && noOfLines < _headerNoOfLines)	
	{
		#ifdef _WIN32
			resize(width(), height()-(ht) );
		#else
			resize(width(), height()-(ht+1) );
		#endif		
		_headerText->resize(width(), height()-_headerLabel->height()-2);
		_headerNoOfLines--;		
	}
}
 
void ChemHeader::resizeEvent(QResizeEvent*)
{
	if(height() > _headerMaxHeight)
	{
 
	}
}

//header.cpp
ChemHeader::ChemHeader(QWidget* parent, const char* name )
:QFrame ( parent, name )
{	
	setBackgroundColor(Qt::white);
	_headerText = new QTextEdit(this);	
	
	_headerLabel = new QLabel(this);
	_headerLabel->setText("Header");
	_headerLabel->setBackgroundColor(Qt::white);
	_headerText->setFocus();
	QRect rec = frameRect();
	QPoint p= rec.topLeft();
	_headerLabel->setGeometry(p.x()+10, p.y(), 45, 10);	

	QRect labelRect = _headerLabel->geometry();
	QPoint pp = labelRect.bottomLeft();
	
	_headerText->setGeometry(p.x(), pp.y()+3, width(),height()-_headerLabel->height()-20);		
	
	_headerText->setHScrollBarMode(QScrollView::AlwaysOff);	
	_headerText->setWrapPolicy ( QTextEdit::AtWordOrDocumentBoundary );
	connect(_headerText, SIGNAL(textChanged()), this, SLOT( slotHeaderTextChanged())); 

	_headerNoOfLines = 2;				
	_headerMaxHeight = parent->height()/3;	
                 //set Maximum height
	_headerText->setMaximumHeight(_headerMaxHeight);
}

ChemHeader::~ChemHeader()
{}

//_headerText  is a QTextEdit
void ChemHeader::slotHeaderTextChanged()
{	
	int noOfLines = _headerText->lines();
	
	QFont f = _headerText->currentFont();
	QFontMetrics fm(f);
	int ht = fm.height();
	if(noOfLines > _headerNoOfLines)
	{
		#ifdef _WIN32
			resize(width(), height()+(ht) );
		#else
			resize(width(), height()+(ht+1) );
		#endif		
		_headerText->resize(width(), height() -_headerLabel->height()-2);
		_headerNoOfLines = noOfLines;		
	}
	else if( _headerNoOfLines > 2 && noOfLines < _headerNoOfLines)	
	{
		#ifdef _WIN32
			resize(width(), height()-(ht) );
		#else
			resize(width(), height()-(ht+1) );
		#endif		
		_headerText->resize(width(), height()-_headerLabel->height()-2);
		_headerNoOfLines--;		
	}
}

void ChemHeader::resizeEvent(QResizeEvent*)
{
	if(height() > _headerMaxHeight)
	{
	   			
	}
}

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Any suggestions will be highly appreciated
Thankx

[vermarajeev]

I have also tried this, but after line number 14 whatever I enter, the QTextEdit does not accept anything, But what is I want the user to delete some lines, move cursor up or down...

chemMainWindow::chemMainWindow(QWidget* parent, const char* name)
:QMainWindow(parent, name)
{
	header = new ChemHeader(this);
	footer = new ChemFooter(this);
	setGeometry(80, 300, 300, 50);
 
	_headerEditor = header->headerEditor();
	_headerEditor->installEventFilter( this );
 
	QPopupMenu * disable = new QPopupMenu( this );
    menuBar()->insertItem( "&Disable", disable );
    disable->insertItem( "&Disable", this, SLOT(slotDisable()), Key_F1 );	
 
	QPopupMenu * enable = new QPopupMenu( this );
    menuBar()->insertItem( "&Enable", enable );
    enable->insertItem( "&Ensable", this, SLOT(slotEnable()), Key_F2 );	
}
 
bool chemMainWindow::eventFilter( QObject *obj, QEvent *ev )
 {
        if ( obj == _headerEditor ) 
		{
            if ( _headerEditor->lines() >= 14  && ev->type() == QEvent::KeyPress ) 
			{
                QKeyEvent *k = (QKeyEvent*)ev;
                qDebug( "Ate key press %d", k->key() );
                return TRUE;
            } else 
			{
                return FALSE;
            }
        }
		else
		{
            // pass the event on to the parent class
            return QMainWindow::eventFilter( obj, ev );
        }
}

chemMainWindow::chemMainWindow(QWidget* parent, const char* name)
:QMainWindow(parent, name)
{
	header = new ChemHeader(this);
	footer = new ChemFooter(this);
	setGeometry(80, 300, 300, 50);

	_headerEditor = header->headerEditor();
	_headerEditor->installEventFilter( this );

	QPopupMenu * disable = new QPopupMenu( this );
    menuBar()->insertItem( "&Disable", disable );
    disable->insertItem( "&Disable", this, SLOT(slotDisable()), Key_F1 );	

	QPopupMenu * enable = new QPopupMenu( this );
    menuBar()->insertItem( "&Enable", enable );
    enable->insertItem( "&Ensable", this, SLOT(slotEnable()), Key_F2 );	
}

bool chemMainWindow::eventFilter( QObject *obj, QEvent *ev )
 {
        if ( obj == _headerEditor ) 
		{
            if ( _headerEditor->lines() >= 14  && ev->type() == QEvent::KeyPress ) 
			{
                QKeyEvent *k = (QKeyEvent*)ev;
                qDebug( "Ate key press %d", k->key() );
                return TRUE;
            } else 
			{
                return FALSE;
            }
        }
		else
		{
            // pass the event on to the parent class
            return QMainWindow::eventFilter( obj, ev );
        }
}

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[joseph]

I could not fully catchup your problem. But if you need to avoid the scroll view
you can use like this

QTextEdit  * m_textEdit =  new QTextEdit ( .... );
 
m_textEdit-> setHScrollBarMode ( QScrollView::AlwaysOff  ); //or use any mode as u prefer

QTextEdit  * m_textEdit =  new QTextEdit ( .... );

m_textEdit-> setHScrollBarMode ( QScrollView::AlwaysOff  ); //or use any mode as u prefer

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else if you want more than the feature of a normal QTextEdit..
Why don't you create your own TextEdit ( subclass QTextEdit ).

[vermarajeev]

Thankx, I have got it...