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headerview.cpp

/*
 * QMPDClient - An MPD client written in Qt 4.
 * Copyright (C) 2005-2008 HÃ¥vard Tautra Knutsen <havtknut@tihlde.org>
 *
 * This program 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 program 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include "config.h"
#include "headerview.h"

#include <QContextMenuEvent>
#include <QMenu>

const int HEADER_FORMAT = 108;

HeaderView::HeaderView(QWidget *p) : QHeaderView(Qt::Horizontal, p),
            m_menu(new QMenu(this)) {
      setMovable(true);
      connect(Config::instance(), SIGNAL(autoResizeChanged(bool)), this, SLOT(autoResizeChanged(bool)));
}

void HeaderView::mouseReleaseEvent(QMouseEvent *e) {
      // sectionClicked(int) signal is emitted too early, and thus saves the previous sortorder.
      // Therefore we save it here.
      QHeaderView::mouseReleaseEvent(e);
      save();
}

void HeaderView::autoResizeChanged(bool a) {
      if (!a) {
            setResizeMode(QHeaderView::Interactive);
            setStretchLastSection(true);
            return;
      }

      setUpdatesEnabled(false);
      setStretchLastSection(false);
      for (int i = 0; i < m_columns.size(); i++) {
            if (visualIndex(i) < 0)
                  continue;
            Column col = m_columns.at(i);
            if (col == TRACK || col == LENGTH || col == DATE)
                  setResizeMode(i, QHeaderView::ResizeToContents);
            else
                  setResizeMode(i, QHeaderView::Stretch);
      }
      setUpdatesEnabled(true);

      if (model())
            update();
}

void HeaderView::restore() {
      Q_ASSERT(m_menu);
      Q_ASSERT(model());
      blockSignals(true);

      // Restore view state
      QByteArray ba2(Config::instance()->headerViewState(objectName()));
      if (!ba2.isEmpty()) {
            QDataStream ds2(&ba2, QIODevice::ReadOnly);
            int version;
            ds2 >> version;
            if (version == HEADER_FORMAT) {
                  for (int j = 0;j < model()->columnCount();j++) {
                        int size, vi;
                        bool hidden;
                        ds2 >> size >> vi >> hidden;
                        resizeSection(j, size);
                        moveSection(visualIndex(j), vi);
                        setSectionHidden(j, hidden);
                  }
                  int sortOrder, sortSection;
                  ds2 >> sortOrder >> sortSection;
                  setSortIndicator(sortSection, (Qt::SortOrder)sortOrder);
            } else { // Header state was of incorrect version. Use defaults.
                  setDefaults();
            }
      } else { // Header state was empty. Use defaults.
            setDefaults();
      }

      for (int i = 0; i < m_columns.size(); i++) {
            QAction *a = m_menu->addAction(columnName(m_columns.at(i)), this, SLOT(actionTriggered()));
            a->setCheckable(true);
            a->setChecked(!isSectionHidden(i));
      }

      autoResizeChanged(Config::instance()->autoResizeColumns());

      blockSignals(false);
}

void HeaderView::save() {
      Q_ASSERT(model());
      // Save headerview state
      QByteArray ba;
      QDataStream ds(&ba, QIODevice::ReadWrite);
      ds << HEADER_FORMAT;
      for (int i = 0;i < model()->columnCount();i++) {
            if (isSectionHidden(i))
                  ds << 100;
            else
                  ds << sectionSize(i);
            ds << visualIndex(i);
            ds << isSectionHidden(i);
      }
      ds << (int)sortIndicatorOrder();
      ds << sortIndicatorSection();
      Config::instance()->setHeaderViewState(objectName(), ba);
}

void HeaderView::contextMenuEvent(QContextMenuEvent *event) {
      if (m_columns.size() > 1) {
            Q_ASSERT(m_menu);
            m_menu->popup(event->globalPos());
      }
}

void HeaderView::actionTriggered() {
      Q_ASSERT(m_menu);
      blockSignals(true);
      int i = 0;
      foreach(QAction *a, m_menu->actions()) {
            setSectionHidden(i++, !a->isChecked());
      }
      blockSignals(false);
      save();
}

QList<HeaderView::Column> HeaderView::columns() const {
      return m_columns;
}

QString HeaderView::columnName(Column col) const {
      switch (col) {
            case HeaderView::TITLE:
                  return QObject::tr("Title");
            case HeaderView::TRACK:
                  return QObject::tr("Track");
            case HeaderView::ARTIST:
                  return QObject::tr("Artist");
            case HeaderView::ALBUM:
                  return QObject::tr("Album");
            case HeaderView::LENGTH:
                  return QObject::tr("Length");
            case HeaderView::URL:
                  return QObject::tr("URL");
            case HeaderView::FILENAME:
                  return QObject::tr("Filename");
            case HeaderView::GENRE:
                  return QObject::tr("Genre");
            case HeaderView::DATE:
                  return QObject::tr("Date");
            case HeaderView::COMMENT:
                  return QObject::tr("Comment");
            case HeaderView::DISC:
                  return QObject::tr("Disc");
            case HeaderView::COMPOSER:
                  return QObject::tr("Composer");
            case HeaderView::PERFORMER:
                  return QObject::tr("Performer");
            default:
                  return "?";
      }
}

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