lightlinenumberwidget.cpp

/***************************************************************************
 *   copyright       : (C) 2003-2011 by Pascal Brachet                     *
 *   http://www.xm1math.net/texmaker/                                      *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "lightlinenumberwidget.h"
#include <QTextDocument>
#include <QTextCursor>
#include <QPlainTextEdit>
#include <QTextBlock>
#include "blockdata.h"

LightLineNumberWidget::LightLineNumberWidget(LightLatexEditor* editor, QWidget* parent)
    : QWidget( parent) ,
      m_editor( editor ) {
    setAutoFillBackground( true );
    QPalette p( palette() );
    p.setColor( backgroundRole(), QColor( "#DEE4EB" ) );
    setPalette( p );
//setToolTip(tr("Click to add or remove a bookmark"));
    start=-1;
    end=-1;
    connect( m_editor->verticalScrollBar(), SIGNAL( valueChanged( int ) ), this, SLOT( update() ) );
    connect( m_editor->verticalScrollBar(), SIGNAL( actionTriggered( int ) ), this, SLOT( update() ) );
    connect( m_editor, SIGNAL( textChanged() ), this, SLOT( update() ) );
    connect(m_editor, SIGNAL(updatelineWidget()), this, SLOT(update()));
}

LightLineNumberWidget::~LightLineNumberWidget() {
}

void LightLineNumberWidget::paintEvent( QPaintEvent* event ) {
    int max=0;
    int l=0;
    QPainter painter( this );
    painter.setFont(numfont);
    const QFontMetrics fm(numfont);
    const QBrush oldbrush=painter.brush();
    QPen oldpen(QColor("#136872"));
    oldpen.setStyle(Qt::SolidLine);
    const QBrush bookmarkbrush(QColor("#1B8EA6"));
    const QPen bookmarkpen(QColor("#FFFFFF"));

    QTextDocument *doc = m_editor->document();
    int i = 1;
    QTextBlock p = doc->begin();
    QTextBlock np;
    QString numtext;


    painter.setPen(oldpen);
    painter.drawLine(width()-2,0,width()-2,height());

    int rmin=-1;
    int rmax=-1;
    int realmin=-1;
    int top;
    int delta;
    while ( p.isValid()) {
        if (p.isVisible()) top = (int) m_editor->blockGeometry(p).top();
        np=p.next();
        if ( np.isValid() && np.isVisible()) delta= (int) m_editor->blockGeometry(np).top()-top;
        else delta=fm.lineSpacing();
        if (top<0) {
            if (i==start+1) {
                realmin=top;
                if (top>=0) rmin=top;
                else rmin=0;
            }
            if (i<=end+1) rmax=top+delta;//top+fm.lineSpacing();
            p = p.next();
            i++;
            continue;
        }
        if (top>height()) break;
        for (int j = 0; j < 3; ++j) {
            if (m_editor->UserBookmark[j]==i) {

                painter.fillRect(2, top,fm.width("0")+6,fm.lineSpacing(), bookmarkbrush);
                painter.setPen(bookmarkpen);
                painter.drawText(4,top,width()-4,fm.lineSpacing(),Qt::AlignLeft | Qt::AlignTop,QString::number(j+1));
            }
        }
        painter.setPen(oldpen);
        numtext=QString::number(i);
        if (p.isVisible()) painter.drawText(10+fm.width("0"), top,fm.width(numtext),fm.lineSpacing(),Qt::AlignRight | Qt::AlignTop,numtext);
        l= fm.width(numtext)+8+fm.width("0");
        if (l>max) max=l;
        if (i==start+1) {
            realmin=top;
            if (top>=0) rmin=top;
            else rmin=0;
        }
        if (i<=end+1) rmax=top+delta;//top+fm.lineSpacing();

        p = p.next();
        i++;
    }
    if (i>=10000) setFixedWidth(max);
    painter.end();
}

void LightLineNumberWidget::mousePressEvent(QMouseEvent *e) {
    e->accept();
    const QFontMetrics fm(numfont);
    QPoint p = m_editor->viewport()->mapFromGlobal(e->globalPos());
    QTextCursor cur( m_editor->cursorForPosition(p) );
    int i = m_editor->linefromblock(cur.block());

    if ( i==-1 ) return;
    for (int j = 0; j < 3; ++j) {
        if (m_editor->UserBookmark[j]==i) {
            m_editor->UserBookmark[j]=0;
            update();
            return;
        }
    }
    for (int j = 0; j < 3; ++j) {
        if (m_editor->UserBookmark[j]==0) {
            m_editor->UserBookmark[j]=i;
            update();
            return;
        }
    }

}

void LightLineNumberWidget::setFont(QFont efont) {
    numfont=efont;
}

bool LightLineNumberWidget::event(QEvent *event) {
    const QFontMetrics fm(numfont);
    if (event->type() == QEvent::ToolTip) {
        QHelpEvent *helpEvent = static_cast<QHelpEvent *>(event);
        int p = helpEvent->pos().x();
        if (abs(p)>=fm.width("0")+8) {
            QToolTip::hideText();
            event->ignore();
        } else QToolTip::showText(helpEvent->globalPos(),tr("Click to add or remove a bookmark"));
        return true;
    }
    return QWidget::event(event);
}