ca564287ee
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26876 a1c6a512-1295-4272-9138-f99709370657
149 lines
4.6 KiB
C++
149 lines
4.6 KiB
C++
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* This file has been copied from Nokia's Qt Examples, with minor modifications
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* made available under the LGPL version 2.1, as the original file was licensed
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*
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****************************************************************************
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****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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****************************************************************************/
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#include <QtGui>
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#include "codeeditor.h"
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//![constructor]
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CodeEditor::CodeEditor(QWidget *parent) : QPlainTextEdit(parent)
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{
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lineNumberArea = new LineNumberArea(this);
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connect(this, SIGNAL(blockCountChanged(int)),
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this, SLOT(updateLineNumberAreaWidth(int)));
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connect(this, SIGNAL(updateRequest(QRect,int)),
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this, SLOT(updateLineNumberArea(QRect,int)));
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updateLineNumberAreaWidth(0);
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}
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//![constructor]
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//![extraAreaWidth]
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int CodeEditor::lineNumberAreaWidth()
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{
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int digits = 1;
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int max = qMax(1, blockCount());
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while (max >= 10) {
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max /= 10;
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++digits;
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}
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int space = 3 + fontMetrics().width(QLatin1Char('9')) * digits;
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return space;
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}
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//![extraAreaWidth]
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//![slotUpdateExtraAreaWidth]
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void CodeEditor::updateLineNumberAreaWidth(int /* newBlockCount */)
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{
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setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
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}
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//![slotUpdateExtraAreaWidth]
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//![slotUpdateRequest]
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void CodeEditor::updateLineNumberArea(const QRect &rect, int dy)
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{
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if (dy)
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lineNumberArea->scroll(0, dy);
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else
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lineNumberArea->update(0, rect.y(), lineNumberArea->width(), rect.height());
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if (rect.contains(viewport()->rect()))
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updateLineNumberAreaWidth(0);
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}
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//![slotUpdateRequest]
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//![resizeEvent]
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void CodeEditor::resizeEvent(QResizeEvent *e)
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{
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QPlainTextEdit::resizeEvent(e);
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QRect cr = contentsRect();
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lineNumberArea->setGeometry(QRect(cr.left(), cr.top(),
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lineNumberAreaWidth(), cr.height()));
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}
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//![resizeEvent]
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//![extraAreaPaintEvent_0]
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void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
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{
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QPainter painter(lineNumberArea);
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painter.fillRect(event->rect(), Qt::lightGray);
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//![extraAreaPaintEvent_0]
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//![extraAreaPaintEvent_1]
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QTextBlock block = firstVisibleBlock();
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int blockNumber = block.blockNumber();
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int top = (int) blockBoundingGeometry(block).translated(contentOffset()).top();
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int bottom = top + (int) blockBoundingRect(block).height();
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//![extraAreaPaintEvent_1]
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//![extraAreaPaintEvent_2]
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while (block.isValid() && top <= event->rect().bottom()) {
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if (block.isVisible() && bottom >= event->rect().top()) {
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QString number = QString::number(blockNumber + 1);
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/* Drawing an error circle if necessary */
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if(errors.contains(blockNumber + 1))
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{
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painter.fillRect(QRect(0, top, lineNumberArea->width(),
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fontMetrics().height()), errorColor);
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}
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painter.setPen(Qt::black);
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painter.drawText(0, top, lineNumberArea->width(),
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fontMetrics().height(), Qt::AlignRight, number);
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}
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block = block.next();
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top = bottom;
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bottom = top + (int) blockBoundingRect(block).height();
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++blockNumber;
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}
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}
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//![extraAreaPaintEvent_2]
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