0cc507214a
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26683 a1c6a512-1295-4272-9138-f99709370657
143 lines
4.3 KiB
C++
143 lines
4.3 KiB
C++
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* This file has been copied from Nokia's Qt Examples, with minor modifications
|
|
* made available under the LGPL version 2.1, as the original file was licensed
|
|
*
|
|
****************************************************************************
|
|
****************************************************************************
|
|
**
|
|
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
|
|
** All rights reserved.
|
|
** Contact: Nokia Corporation (qt-info@nokia.com)
|
|
**
|
|
** This file is part of the examples of the Qt Toolkit.
|
|
**
|
|
** GNU Lesser General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU Lesser
|
|
** General Public License version 2.1 as published by the Free Software
|
|
** Foundation and appearing in the file LICENSE.LGPL included in the
|
|
** packaging of this file. Please review the following information to
|
|
** ensure the GNU Lesser General Public License version 2.1 requirements
|
|
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
|
**
|
|
** In addition, as a special exception, Nokia gives you certain additional
|
|
** rights. These rights are described in the Nokia Qt LGPL Exception
|
|
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
|
**
|
|
****************************************************************************/
|
|
|
|
#include <QtGui>
|
|
|
|
#include "codeeditor.h"
|
|
|
|
//![constructor]
|
|
|
|
CodeEditor::CodeEditor(QWidget *parent) : QPlainTextEdit(parent)
|
|
{
|
|
lineNumberArea = new LineNumberArea(this);
|
|
|
|
connect(this, SIGNAL(blockCountChanged(int)),
|
|
this, SLOT(updateLineNumberAreaWidth(int)));
|
|
connect(this, SIGNAL(updateRequest(QRect,int)),
|
|
this, SLOT(updateLineNumberArea(QRect,int)));
|
|
|
|
updateLineNumberAreaWidth(0);
|
|
}
|
|
|
|
//![constructor]
|
|
|
|
//![extraAreaWidth]
|
|
|
|
int CodeEditor::lineNumberAreaWidth()
|
|
{
|
|
int digits = 1;
|
|
int max = qMax(1, blockCount());
|
|
while (max >= 10) {
|
|
max /= 10;
|
|
++digits;
|
|
}
|
|
|
|
int space = 3 + fontMetrics().width(QLatin1Char('9')) * digits;
|
|
|
|
return space;
|
|
}
|
|
|
|
//![extraAreaWidth]
|
|
|
|
//![slotUpdateExtraAreaWidth]
|
|
|
|
void CodeEditor::updateLineNumberAreaWidth(int /* newBlockCount */)
|
|
{
|
|
setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
|
|
}
|
|
|
|
//![slotUpdateExtraAreaWidth]
|
|
|
|
//![slotUpdateRequest]
|
|
|
|
void CodeEditor::updateLineNumberArea(const QRect &rect, int dy)
|
|
{
|
|
if (dy)
|
|
lineNumberArea->scroll(0, dy);
|
|
else
|
|
lineNumberArea->update(0, rect.y(), lineNumberArea->width(), rect.height());
|
|
|
|
if (rect.contains(viewport()->rect()))
|
|
updateLineNumberAreaWidth(0);
|
|
}
|
|
|
|
//![slotUpdateRequest]
|
|
|
|
//![resizeEvent]
|
|
|
|
void CodeEditor::resizeEvent(QResizeEvent *e)
|
|
{
|
|
QPlainTextEdit::resizeEvent(e);
|
|
|
|
QRect cr = contentsRect();
|
|
lineNumberArea->setGeometry(QRect(cr.left(), cr.top(),
|
|
lineNumberAreaWidth(), cr.height()));
|
|
}
|
|
|
|
//![resizeEvent]
|
|
|
|
//![extraAreaPaintEvent_0]
|
|
|
|
void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event)
|
|
{
|
|
QPainter painter(lineNumberArea);
|
|
painter.fillRect(event->rect(), Qt::lightGray);
|
|
|
|
//![extraAreaPaintEvent_0]
|
|
|
|
//![extraAreaPaintEvent_1]
|
|
QTextBlock block = firstVisibleBlock();
|
|
int blockNumber = block.blockNumber();
|
|
int top = (int) blockBoundingGeometry(block).translated(contentOffset()).top();
|
|
int bottom = top + (int) blockBoundingRect(block).height();
|
|
//![extraAreaPaintEvent_1]
|
|
|
|
//![extraAreaPaintEvent_2]
|
|
while (block.isValid() && top <= event->rect().bottom()) {
|
|
if (block.isVisible() && bottom >= event->rect().top()) {
|
|
QString number = QString::number(blockNumber + 1);
|
|
painter.setPen(Qt::black);
|
|
painter.drawText(0, top, lineNumberArea->width(), fontMetrics().height(),
|
|
Qt::AlignRight, number);
|
|
}
|
|
|
|
block = block.next();
|
|
top = bottom;
|
|
bottom = top + (int) blockBoundingRect(block).height();
|
|
++blockNumber;
|
|
}
|
|
}
|
|
//![extraAreaPaintEvent_2]
|
|
|