Chris@523: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@523: 
Chris@523: /*
Chris@523:     EasyMercurial
Chris@523: 
Chris@523:     Based on HgExplorer by Jari Korhonen
Chris@523:     Copyright (c) 2010 Jari Korhonen
Chris@644:     Copyright (c) 2013 Chris Cannam
Chris@644:     Copyright (c) 2013 Queen Mary, University of London
Chris@523:     
Chris@523:     This program is free software; you can redistribute it and/or
Chris@523:     modify it under the terms of the GNU General Public License as
Chris@523:     published by the Free Software Foundation; either version 2 of the
Chris@523:     License, or (at your option) any later version.  See the file
Chris@523:     COPYING included with this distribution for more information.
Chris@523: */
Chris@523: 
Chris@523: /*
Chris@523:     This file adapted from Rosegarden, a sequencer and musical
Chris@560:     notation editor.  Copyright 2000-2012 the Rosegarden development
Chris@523:     team.
Chris@523: 
Chris@523:     Adapted from KDE 4.2.0, this code originally Copyright (c) 2000
Chris@523:     Ronny Standtke.
Chris@523: */
Chris@523: 
Chris@523: #include "squeezedlabel.h"
Chris@523: 
Chris@523: #include <iostream>
Chris@523: 
Chris@523: #include <QContextMenuEvent>
Chris@523: #include <QAction>
Chris@523: #include <QMenu>
Chris@523: #include <QClipboard>
Chris@523: #include <QApplication>
Chris@523: #include <QMimeData>
Chris@523: #include <QDesktopWidget>
Chris@523: 
Chris@523: 
Chris@523: class SqueezedLabelPrivate
Chris@523: {
Chris@523: public:
Chris@523: };
Chris@523: 
Chris@523: void SqueezedLabel::_k_copyFullText()
Chris@523: {
Chris@523:     QMimeData* data = new QMimeData;
Chris@523:     data->setText(fullText);
Chris@523:     QApplication::clipboard()->setMimeData(data);
Chris@523: }
Chris@523: 
Chris@523: SqueezedLabel::SqueezedLabel(const QString &text , QWidget *parent)
Chris@523:         : QLabel (parent)
Chris@523: {
Chris@523:     setObjectName("SQUEEZED");
Chris@523:     setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed));
Chris@523:     fullText = text;
Chris@523:     elideMode = Qt::ElideMiddle;
Chris@523:     squeezeTextToLabel();
Chris@523: }
Chris@523: 
Chris@523: SqueezedLabel::SqueezedLabel(QWidget *parent)
Chris@523:         : QLabel (parent)
Chris@523: {
Chris@523:     setObjectName("SQUEEZED");
Chris@523:     setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed));
Chris@523:     elideMode = Qt::ElideMiddle;
Chris@523: }
Chris@523: 
Chris@523: SqueezedLabel::~SqueezedLabel()
Chris@523: {
Chris@523: }
Chris@523: 
Chris@523: void SqueezedLabel::resizeEvent(QResizeEvent *)
Chris@523: {
Chris@523:     squeezeTextToLabel();
Chris@523: }
Chris@523: 
Chris@523: QSize SqueezedLabel::minimumSizeHint() const
Chris@523: {
Chris@523:     QSize sh = QLabel::minimumSizeHint();
Chris@523:     sh.setWidth(-1);
Chris@523:     return sh;
Chris@523: }
Chris@523: 
Chris@523: QSize SqueezedLabel::sizeHint() const
Chris@523: {
Chris@523:     int dw = QApplication::desktop()->availableGeometry(QPoint(0, 0)).width();
Chris@523:     int maxWidth = dw * 3 / 4;
Chris@523:     QFontMetrics fm(fontMetrics());
Chris@523:     int textWidth = fm.width(fullText);
Chris@523:     if (textWidth > maxWidth) {
Chris@523:         textWidth = maxWidth;
Chris@523:     }
Chris@523:     return QSize(textWidth, QLabel::sizeHint().height());
Chris@523: }
Chris@523: 
Chris@523: void SqueezedLabel::setText(const QString &text)
Chris@523: {
Chris@523:     fullText = text;
Chris@523:     squeezeTextToLabel();
Chris@523: }
Chris@523: 
Chris@523: void SqueezedLabel::clear() {
Chris@523:     fullText.clear();
Chris@523:     QLabel::clear();
Chris@523: }
Chris@523: 
Chris@523: void SqueezedLabel::squeezeTextToLabel() {
Chris@523:     QFontMetrics fm(fontMetrics());
Chris@523:     int labelWidth = size().width();
Chris@523:     QStringList squeezedLines;
Chris@523:     bool squeezed = false;
Chris@523:     Q_FOREACH(const QString& line, fullText.split('\n')) {
Chris@523:         int lineWidth = fm.width(line);
Chris@523:         if (lineWidth > labelWidth) {
Chris@523:             squeezed = true;
Chris@523:             squeezedLines << fm.elidedText(line, elideMode, labelWidth);
Chris@523:         } else {
Chris@523:             squeezedLines << line;
Chris@523:         }
Chris@523:     }
Chris@523: 
Chris@523:     if (squeezed) {
Chris@523:         QLabel::setText(squeezedLines.join("\n"));
Chris@523:         setToolTip(fullText);
Chris@523:     } else {
Chris@523:         QLabel::setText(fullText);
Chris@523:         setToolTip(QString());
Chris@523:     }
Chris@523: }
Chris@523: 
Chris@523: void SqueezedLabel::setAlignment(Qt::Alignment alignment)
Chris@523: {
Chris@523:     // save fullText and restore it
Chris@523:     QString tmpFull(fullText);
Chris@523:     QLabel::setAlignment(alignment);
Chris@523:     fullText = tmpFull;
Chris@523: }
Chris@523: 
Chris@523: Qt::TextElideMode SqueezedLabel::textElideMode() const
Chris@523: {
Chris@523:     return elideMode;
Chris@523: }
Chris@523: 
Chris@523: void SqueezedLabel::setTextElideMode(Qt::TextElideMode mode)
Chris@523: {
Chris@523:     elideMode = mode;
Chris@523:     squeezeTextToLabel();
Chris@523: }
Chris@523: 
Chris@523: void SqueezedLabel::contextMenuEvent(QContextMenuEvent* ev)
Chris@523: {
Chris@523:     // "We" means the KDE team here.
Chris@523:     //
Chris@523:     // We want to reimplement "Copy" to include the elided text.
Chris@523:     // But this means reimplementing the full popup menu, so no more
Chris@523:     // copy-link-address or copy-selection support anymore, since we
Chris@523:     // have no access to the QTextDocument.
Chris@523:     // Maybe we should have a boolean flag in SqueezedLabel itself for
Chris@523:     // whether to show the "Copy Full Text" custom popup?
Chris@523:     // For now I chose to show it when the text is squeezed; when it's not, the
Chris@523:     // standard popup menu can do the job (select all, copy).
Chris@523: 
Chris@523:     const bool squeezed = text() != fullText;
Chris@523:     const bool showCustomPopup = squeezed;
Chris@523:     if (showCustomPopup) {
Chris@523:         QMenu menu(this);
Chris@523: 
Chris@523:         QAction* act = new QAction(tr("&Copy Full Text"), this);
Chris@523:         connect(act, SIGNAL(triggered()), this, SLOT(_k_copyFullText()));
Chris@523:         menu.addAction(act);
Chris@523: 
Chris@523:         ev->accept();
Chris@523:         menu.exec(ev->globalPos());
Chris@523:     } else {
Chris@523:         QLabel::contextMenuEvent(ev);
Chris@523:     }
Chris@523: }
Chris@523: