/src/libtomahawk/playlist/ViewHeader.cpp

  1/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
  2 *
  3 *   Copyright 2010-2015, Christian Muehlhaeuser <muesli@tomahawk-player.org>
  4 *
  5 *   Tomahawk is free software: you can redistribute it and/or modify
  6 *   it under the terms of the GNU General Public License as published by
  7 *   the Free Software Foundation, either version 3 of the License, or
  8 *   (at your option) any later version.
  9 *
 10 *   Tomahawk is distributed in the hope that it will be useful,
 11 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 13 *   GNU General Public License for more details.
 14 *
 15 *   You should have received a copy of the GNU General Public License
 16 *   along with Tomahawk. If not, see <http://www.gnu.org/licenses/>.
 17 */
 18
 19#include "ViewHeader.h"
 20
 21#include <QContextMenuEvent>
 22#include <QMenu>
 23
 24#include "TomahawkSettings.h"
 25#include "utils/TomahawkUtilsGui.h"
 26#include "utils/Logger.h"
 27
 28
 29ViewHeader::ViewHeader( QAbstractItemView* parent )
 30    : QHeaderView( Qt::Horizontal, parent )
 31    , m_parent( parent )
 32    , m_menu( new QMenu( this ) )
 33    , m_sigmap( new QSignalMapper( this ) )
 34    , m_init( false )
 35{
 36    m_menu->setFont( TomahawkUtils::systemFont() );
 37
 38    setSectionResizeMode( QHeaderView::Interactive );
 39    setSectionsMovable( true );
 40    setMinimumSectionSize( 60 );
 41    setDefaultAlignment( Qt::AlignLeft );
 42    setStretchLastSection( true );
 43
 44//    m_menu->addAction( tr( "Resize columns to fit window" ), this, SLOT( onToggleResizeColumns() ) );
 45//    m_menu->addSeparator();
 46
 47    connect( m_sigmap, SIGNAL( mapped( int ) ), SLOT( toggleVisibility( int ) ) );
 48}
 49
 50
 51ViewHeader::~ViewHeader()
 52{
 53}
 54
 55
 56int
 57ViewHeader::visibleSectionCount() const
 58{
 59    return count() - hiddenSectionCount();
 60}
 61
 62
 63void
 64ViewHeader::onSectionsChanged()
 65{
 66    tDebug( LOGVERBOSE ) << "Saving columns state for view guid:" << m_guid;
 67    if ( !m_guid.isEmpty() )
 68        TomahawkSettings::instance()->setPlaylistColumnSizes( m_guid, saveState() );
 69}
 70
 71
 72bool
 73ViewHeader::checkState()
 74{
 75    if ( !count() || m_init )
 76        return false;
 77
 78    disconnect( this, SIGNAL( sectionMoved( int, int, int ) ), this, SLOT( onSectionsChanged() ) );
 79    disconnect( this, SIGNAL( sectionResized( int, int, int ) ), this, SLOT( onSectionsChanged() ) );
 80
 81    QByteArray state;
 82    if ( !m_guid.isEmpty() )
 83        state = TomahawkSettings::instance()->playlistColumnSizes( m_guid );
 84
 85    if ( !state.isEmpty() )
 86    {
 87        tDebug( LOGVERBOSE ) << Q_FUNC_INFO << "Restoring columns state for view:" << m_guid;
 88        restoreState( state );
 89    }
 90    else
 91    {
 92        tDebug( LOGVERBOSE ) << Q_FUNC_INFO << "Giving columns of view" << m_guid << "initial weighting:" << m_columnWeights << "for" << count() << "columns";
 93        for ( int i = 0; i < count() - 1; i++ )
 94        {
 95            if ( isSectionHidden( i ) )
 96                continue;
 97            if ( i >= m_columnWeights.count() )
 98                break;
 99
100            double nw = (double)m_parent->width() * m_columnWeights.at( i );
101            resizeSection( i, qMax( minimumSectionSize(), int( nw - 0.5 ) ) );
102        }
103    }
104
105    connect( this, SIGNAL( sectionMoved( int, int, int ) ), SLOT( onSectionsChanged() ) );
106    connect( this, SIGNAL( sectionResized( int, int, int ) ), SLOT( onSectionsChanged() ) );
107
108    m_init = true;
109    return true;
110}
111
112
113void
114ViewHeader::addColumnToMenu( int index )
115{
116    QString title = m_parent->model()->headerData( index, Qt::Horizontal, Qt::DisplayRole ).toString();
117
118    QAction* action = m_menu->addAction( title, m_sigmap, SLOT( map() ) );
119    action->setCheckable( true );
120    action->setChecked( !isSectionHidden( index ) );
121    m_visActions << action;
122
123    m_sigmap->setMapping( action, index );
124}
125
126
127void
128ViewHeader::contextMenuEvent( QContextMenuEvent* e )
129{
130    qDeleteAll( m_visActions );
131    m_visActions.clear();
132
133    for ( int i = 0; i < count(); i++ )
134        addColumnToMenu( i );
135
136    m_menu->popup( e->globalPos() );
137}
138
139
140void
141ViewHeader::onToggleResizeColumns()
142{
143}
144
145
146void
147ViewHeader::toggleVisibility( int index )
148{
149    if ( isSectionHidden( index ) )
150        showSection( index );
151    else
152        hideSection( index );
153}
154
155
156void
157ViewHeader::setGuid( const QString& guid )
158{
159    m_guid = guid;
160
161    // If we are _not_ initialized yet, this means we're still waiting for the view to resize initially.
162    // We need to wait with restoring our state (column sizes) until that has happened.
163    if ( m_init )
164    {
165        m_init = false;
166        checkState();
167    }
168}