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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 "Debug.h"
#include "ElidedLabel.h"
#include <QApplication>
#include <QClipboard>
#include <QStringList>
//___________________________________________________
ElidedLabel::ElidedLabel( const QString& text, QWidget* parent ):
QLabel( parent ),
Counter( "ElidedLabel" ),
hRefRegExp_( "(<a href=.+>)|(</a>)" )
{
Debug::Throw( "ElidedLabel::ElidedLabel.\n" );
hRefRegExp_.setMinimal( true );
// set size policy
setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Fixed );
// set text
setText( text );
}
//___________________________________________________
ElidedLabel::ElidedLabel( QWidget* parent ):
QLabel( parent ),
Counter( "ElidedLabel" ),
hRefRegExp_( "(<a href=.+>)|(</a>)" ),
elideMode_( Qt::ElideLeft )
{
Debug::Throw( "ElidedLabel::ElidedLabel.\n" );
hRefRegExp_.setMinimal( true );
// set size policy
setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Fixed );
}
//___________________________________________________
void ElidedLabel::setText( const QString& text )
{
fullText_ = text;
updateElidedText();
}
//___________________________________________________
QSize ElidedLabel::minimumSizeHint() const
{ return QSize( -1, QLabel::minimumSizeHint().height() ); }
//___________________________________________________
QSize ElidedLabel::sizeHint() const
{ return QSize( fontMetrics().width(fullText_), QLabel::sizeHint().height() ); }
//___________________________________________________
void ElidedLabel::mouseReleaseEvent( QMouseEvent *event )
{
#if QT_VERSION >= 0x040700
if(
QApplication::clipboard()->supportsSelection() &&
textInteractionFlags() != Qt::NoTextInteraction &&
event->button() == Qt::LeftButton &&
!fullText_.isEmpty() &&
hasSelectedText() )
{
// Expand "..." when selecting with the mouse
QString text = selectedText();
const QChar ellipsis(0x2026); // from qtextengine.cpp
const int dotsPos = text.indexOf(ellipsis);
if (dotsPos > -1)
{
// Ex: abcde...yz, selecting de...y (selectionStart=3)
// charsBeforeSelection = selectionStart = 2 (ab)
// charsAfterSelection = 1 (z)
// final selection length= 26 - 2 - 1 = 23
const int start = selectionStart();
int charsAfterSelection = QLabel::text().length() - start - selectedText().length();
text = fullText_;
// Strip markup tags
if (textFormat() == Qt::RichText )
{
text.replace(QRegExp("<[^>]*>"), "");
// account for stripped characters
charsAfterSelection -= fullText_.length() - text.length();
}
text = text.mid( selectionStart(), text.length() - start - charsAfterSelection );
}
// update clipboard
QApplication::clipboard()->setText( text, QClipboard::Selection );
} else
#endif
{ QLabel::mouseReleaseEvent( event ); }
}
//___________________________________________________
void ElidedLabel::resizeEvent( QResizeEvent* e )
{
QLabel::resizeEvent( e );
updateElidedText();
}
//___________________________________________________
void ElidedLabel::updateElidedText()
{
if( fullText_.isEmpty() ) return;
auto fontMetrics( this->fontMetrics() );
int labelWidth = size().width();
QStringList elidedLines;
bool elided = false;
for( const auto& fullLine:fullText_.split( '\n' ) )
{
// attempt at dealing with rich text
QString prefix;
QString suffix;
QString line( fullLine );
switch( elideMode_ )
{
case Qt::ElideLeft:
{
if( fullLine.indexOf( hRefRegExp_ ) == 0 )
{
prefix = fullLine.left( hRefRegExp_.matchedLength() );
line = fullLine.mid( hRefRegExp_.matchedLength() );
}
break;
}
case Qt::ElideRight:
{
int position( fullLine.lastIndexOf( hRefRegExp_ ) );
if( position >= 0 && position + hRefRegExp_.matchedLength() == fullLine.length() )
{
suffix = fullLine.mid( position );
line = fullLine.left( position );
}
break;
}
default: break;
}
int lineWidth = fontMetrics.width(line);
if (lineWidth > labelWidth)
{
elided = true;
elidedLines << prefix + fontMetrics.elidedText(line, elideMode_, labelWidth ) + suffix;
} else {
elidedLines << fullLine;
}
}
if( elided )
{
QLabel::setText(elidedLines.join("\n"));
setToolTip( fullText_ );
} else {
QLabel::setText( fullText_ );
setToolTip(QString());
}
}
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