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/* This file is part of the KDE libraries
Copyright (C) 2005, 2006 KJSEmbed Authors
See included AUTHORS file.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
--------------------------------------------------------------------------------------
Imported into the WPS editor and simplified by Dominik Wenger
*/
#include <QTextDocument>
#include <QTextBlock>
#include <QTextEdit>
#include <QHBoxLayout>
#include <QScrollBar>
#include <QPainter>
#include <QAbstractTextDocumentLayout>
#include <QDebug>
#include "numberedtextview.h"
NumberBar::NumberBar( QWidget *parent )
: QWidget( parent ), edit(0), markedLine(-1)
{
// Make room for 4 digits and the breakpoint icon
setFixedWidth( fontMetrics().width( QString("0000") + 10 + 32 ) );
markerIcon = QPixmap( "images/marker.png" );
}
NumberBar::~NumberBar()
{
}
void NumberBar::markLine( int lineno )
{
markedLine = lineno;
}
void NumberBar::setTextEdit( QTextEdit *edit )
{
this->edit = edit;
connect( edit->document()->documentLayout(), SIGNAL( update(const QRectF &) ),
this, SLOT( update() ) );
connect( edit->verticalScrollBar(), SIGNAL(valueChanged(int) ),
this, SLOT( update() ) );
}
void NumberBar::paintEvent( QPaintEvent * )
{
QAbstractTextDocumentLayout *layout = edit->document()->documentLayout();
int contentsY = edit->verticalScrollBar()->value();
qreal pageBottom = contentsY + edit->viewport()->height();
const QFontMetrics fm = fontMetrics();
const int ascent = fontMetrics().ascent() + 1; // height = ascent + descent + 1
int lineCount = 1;
QPainter p(this);
markedRect = QRect();
for ( QTextBlock block = edit->document()->begin();
block.isValid(); block = block.next(), ++lineCount )
{
const QRectF boundingRect = layout->blockBoundingRect( block );
QPointF position = boundingRect.topLeft();
if ( position.y() + boundingRect.height() < contentsY )
continue;
if ( position.y() > pageBottom )
break;
const QString txt = QString::number( lineCount );
p.drawText( width() - fm.width(txt), qRound( position.y() ) - contentsY + ascent, txt );
// marker
if ( markedLine == lineCount )
{
p.drawPixmap( 1, qRound( position.y() ) - contentsY, markerIcon );
markedRect = QRect( 1, qRound( position.y() ) - contentsY, markerIcon.width(), markerIcon.height() );
}
}
}
NumberedTextView::NumberedTextView( QWidget *parent )
: QFrame( parent )
{
setFrameStyle( QFrame::StyledPanel | QFrame::Sunken );
setLineWidth( 2 );
// Setup the main view
view = new QTextEdit( this );
//view->setFontFamily( "Courier" );
view->setLineWrapMode( QTextEdit::NoWrap );
view->setFrameStyle( QFrame::NoFrame );
connect( view->document(), SIGNAL(contentsChange(int,int,int)), this, SLOT(textChanged(int,int,int)) );
// Setup the line number pane
numbers = new NumberBar( this );
numbers->setTextEdit( view );
// Test
markLine(2);
//setup layout
box = new QHBoxLayout( this );
box->setSpacing( 0 );
box->setMargin( 0 );
box->addWidget( numbers );
box->addWidget( view );
}
NumberedTextView::~NumberedTextView()
{
}
void NumberedTextView::markLine( int lineno )
{
markedLine = lineno;
numbers->markLine( lineno );
textChanged(1,1,1);
}
void NumberedTextView::scrolltoLine( int lineno )
{
int max = view->verticalScrollBar()->maximum();
int min = view->verticalScrollBar()->minimum();
int lines = view->document()->blockCount();
view->verticalScrollBar()->setValue( (max*lineno)/lines+min );
}
void NumberedTextView::textChanged( int pos, int removed, int added )
{
Q_UNUSED( pos );
if ( removed == 0 && added == 0 )
return;
QTextBlock block = highlight.block();
QTextBlockFormat fmt = block.blockFormat();
QColor bg = view->palette().base().color();
fmt.setBackground( bg );
highlight.setBlockFormat( fmt );
int lineCount = 1;
for ( QTextBlock block = view->document()->begin();
block.isValid(); block = block.next(), ++lineCount )
{
if ( lineCount == markedLine )
{
fmt = block.blockFormat();
QColor bg = Qt::red;
fmt.setBackground( bg.light(150) );
highlight = QTextCursor( block );
highlight.movePosition( QTextCursor::EndOfBlock, QTextCursor::KeepAnchor );
highlight.setBlockFormat( fmt );
break;
}
}
}
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