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/******************************************************************************
*
* Copyright (C) 2002 Hugo PEREIRA <mailto: hugo.pereira@free.fr>
*
* This 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.
*
* This software 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 General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/
#include "IconViewItem.h"
#include "QtUtil.h"
#include <QApplication>
#include <QStyle>
#include <QStyleOptionViewItem>
#include <QTextLayout>
const int IconViewItem::margin = 5;
const int IconViewItem::spacing = 5;
const int IconViewItem::maxTextWidth = 100;
//____________________________________________________________________
/*!
copied from kdelibs/kdecore/text/kstringhandler.cpp
Copyright (C) 1999 Ian Zepp (icszepp@islc.net)
Copyright (C) 2006 by Dominic Battre <dominic@battre.de>
Copyright (C) 2006 by Martin Pool <mbp@canonical.com>
*/
QString preProcessWrap(const QString &text)
{
// break
const QChar brk(0x200b);
// word join
const QChar join(0x2060);
QString result;
result.reserve(text.length());
for (int i = 0; i < text.length(); i++)
{
const QChar c = text[i];
const bool openingParenthesis( (c == QLatin1Char('(') || c == QLatin1Char('{') || c == QLatin1Char('[')) );
const bool closingParenthesis( (c == QLatin1Char(')') || c == QLatin1Char('}') || c == QLatin1Char(']')) );
const bool singleQuote( (c == QLatin1Char('\'') ) );
const bool breakAfter( (closingParenthesis || c.isPunct() || c.isSymbol()) );
const bool nextIsSpace( (i == (text.length() - 1) || text[i + 1].isSpace()) );
const bool prevIsSpace( (i == 0 || text[i - 1].isSpace() || result[result.length() - 1] == brk) );
// Provide a breaking opportunity before opening parenthesis
if( openingParenthesis && !prevIsSpace ) result += brk;
// Provide a word joiner before the single quote
if( singleQuote && !prevIsSpace ) result += join;
result += c;
if( breakAfter && !openingParenthesis && !nextIsSpace && !singleQuote )
{ result += brk; }
}
return result;
}
//____________________________________________________________________
QRect IconViewItem::boundingRect() const
{
if( dirty_ ) const_cast<IconViewItem*>( this )->_updateBoundingRect();
return boundingRect_;
}
//____________________________________________________________________
void IconViewItem::paint( QPainter* painter, const QStyleOption* option, QWidget* widget ) const
{
QRectF boundingRect( this->boundingRect() );
QRectF textRect( boundingRect.adjusted( 0, margin, 0, -margin ) );
const qreal dpiRatio( pixmap_.devicePixelRatio() );
// draw selection
widget->style()->drawPrimitive( QStyle::PE_PanelItemViewItem, option, painter, widget );
if( !pixmap_.isNull() )
{
painter->drawPixmap( QPointF( (boundingRect.width() - pixmap_.width()/dpiRatio)/2, margin ), pixmap_ );
textRect.adjust( 0, pixmap_.height()/dpiRatio + spacing, 0, 0 );
}
if( !text_.isEmpty() )
{
const QString text( preProcessWrap( text_ ) );
const int maxWidth( qMax( maxTextWidth, int(pixmap_.width()/dpiRatio) ) );
QTextOption textOption(Qt::AlignHCenter);
textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
qreal height(0);
QTextLine line;
QTextLayout layout( text, static_cast<const QStyleOptionViewItem*>(option)->font );
layout.setTextOption(textOption);
layout.beginLayout();
while( ( line = layout.createLine() ).isValid())
{
line.setLineWidth(maxWidth);
line.naturalTextWidth();
line.setPosition(QPointF(0, height));
height += line.height();
}
layout.endLayout();
// save old pen
const QPen oldPen( painter->pen() );
// set correct foreground color and render text
painter->setPen( option->palette.color(
option->state & QStyle::State_Active ? QPalette::Active:QPalette::Inactive,
option->state&QStyle::State_Selected ? QPalette::HighlightedText:QPalette::Text ) );
layout.draw( painter, textRect.topLeft() + QPointF( 0.5*(textRect.width()-layout.boundingRect().width()), 0 ), QVector<QTextLayout::FormatRange>(), textRect );
// restore old pen
painter->setPen( oldPen );
}
}
//____________________________________________________________________
void IconViewItem::_updateBoundingRect()
{
boundingRect_ = QRect( 0, 0, 2*margin, 2*margin );
// calculate pixmap size
QSize pixmapSize( pixmap_.size()/pixmap_.devicePixelRatio() );
// calculate text size
QSize textSize;
if( !text_.isEmpty() )
{
const QString text( preProcessWrap( text_ ) );
const int maxWidth( qMax( maxTextWidth, pixmapSize.width() ) );
int maxLineWidth( 0 );
QTextOption textOption(Qt::AlignHCenter);
textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
qreal height(0);
QTextLine line;
QTextLayout layout( text, QApplication::font() );
layout.setTextOption(textOption);
layout.beginLayout();
while( ( line = layout.createLine() ).isValid())
{
line.setLineWidth(maxWidth);
maxLineWidth = qMax( maxLineWidth, (int) line.naturalTextWidth() );
line.setPosition( QPointF( 0, height ) );
height += line.height();
}
layout.endLayout();
textSize = QSize( maxLineWidth, layout.boundingRect().size().toSize().height() );
}
if( !( pixmap_.isNull() || text_.isEmpty() ) )
{
boundingRect_.adjust( 0, 0, qMax( pixmapSize.width(), textSize.width() ), spacing + pixmapSize.height() + textSize.height() );
} else if( !pixmap_.isNull() ) {
boundingRect_.adjust( 0, 0, pixmapSize.width(), pixmapSize.height() );
} else if( !text_.isEmpty() ) {
boundingRect_.adjust( 0, 0, textSize.width(), textSize.height() );
}
dirty_ = false;
}
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