/src/libtomahawk/widgets/BreadcrumbButton.cpp
http://github.com/tomahawk-player/tomahawk · C++ · 197 lines · 134 code · 39 blank · 24 comment · 13 complexity · 2c0fd87dfc89a213367cc3a1f996639c MD5 · raw file
- /* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
- *
- * Copyright 2011, Casey Link <unnamedrambler@gmail.com>
- * Copyright 2010-2011, Leo Franchi <lfranchi@kde.org>
- *
- * Tomahawk 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 3 of the License, or
- * (at your option) any later version.
- *
- * Tomahawk 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 Tomahawk. If not, see <http://www.gnu.org/licenses/>.
- */
- #include "BreadcrumbButton.h"
- #include "Breadcrumb.h"
- #include "ComboBox.h"
- #include "utils/TomahawkStyle.h"
- #include "utils/TomahawkUtilsGui.h"
- #include "utils/Logger.h"
- #include <QPaintEvent>
- #include <QPainter>
- #include <QHBoxLayout>
- using namespace Tomahawk;
- class BreadcrumbArrow : public QWidget
- {
- public:
- BreadcrumbArrow( QWidget* parent )
- : QWidget(parent)
- {
- setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
- }
- protected:
- virtual void paintEvent( QPaintEvent* ) {
- QPainter p( this );
- QStyleOption opt;
- opt.initFrom( this );
- QRect r = rect();
- const bool reverse = opt.direction == Qt::RightToLeft;
- const int menuButtonWidth = 12;
- const int rightSpacing = 10;
- const int right = !reverse ? r.right() - rightSpacing : r.left() + menuButtonWidth;
- const int height = r.height();
- QLine l1( 1, 0, right, height / 2 );
- QLine l2( 1, height, right, height / 2 );
- p.setRenderHint( QPainter::Antialiasing, true );
- // Draw the shadow
- QColor shadow( 0, 0, 0, 100 );
- p.translate( 0, 1 );
- p.setPen( shadow );
- p.drawLine( l1 );
- p.drawLine( l2 );
- // Draw the main arrow
- QColor foreGround( "#747474" );
- p.translate( 0, -1 );
- p.setPen( foreGround );
- p.drawLine( l1 );
- p.drawLine( l2 );
- }
- virtual QSize sizeHint() const
- {
- return QSize( 20, TomahawkUtils::defaultFontHeight() + 8 );
- }
- };
- BreadcrumbButton::BreadcrumbButton( Breadcrumb* parent, QAbstractItemModel* model )
- : QWidget( parent )
- , m_breadcrumb( parent )
- , m_model( model )
- , m_combo( new ComboBox( this ) )
- , m_arrow( new BreadcrumbArrow( this ) )
- {
- setLayout( new QHBoxLayout );
- TomahawkUtils::unmarginLayout( layout() );
- layout()->addWidget( m_combo );
- layout()->addWidget( m_arrow );
- setFixedHeight( TomahawkUtils::defaultFontHeight() + 8 );
- m_combo->setSizeAdjustPolicy( QComboBox::AdjustToContents );
- setSizePolicy( QSizePolicy::Maximum, QSizePolicy::Expanding );
- connect( m_combo, SIGNAL( activated( int ) ), SLOT( comboboxActivated( int ) ) );
- }
- void
- BreadcrumbButton::paintEvent( QPaintEvent* )
- {
- QPainter p( this );
- TomahawkStyle::horizontalHeader( &p, rect() ); // draw the background
- m_arrow->setVisible( hasChildren() );
- }
- QSize
- BreadcrumbButton::sizeHint() const
- {
- // our width = width of combo + 20px for right-arrow and spacing
- const int padding = hasChildren() ? 20 : 8;
- return m_combo->sizeHint() + QSize( padding, 0 );
- }
- void
- BreadcrumbButton::setParentIndex( const QModelIndex& idx )
- {
- m_parentIndex = idx;
- // Populate listview with list of children.
- // Then try to find a default
- QStringList list;
- int count = m_model->rowCount( m_parentIndex );
- int defaultIndex = -1, userSelected = -1;
- for ( int i = 0; i < count; ++i )
- {
- QModelIndex idx = m_model->index( i, 0, m_parentIndex );
- if ( idx.isValid() )
- {
- list << idx.data().toString();
- if ( idx.data( Breadcrumb::DefaultRole ).toBool() )
- defaultIndex = i;
- if ( idx.data( Breadcrumb::UserSelectedRole ).toBool() )
- userSelected = i;
- }
- }
- if ( m_combo->count() && !list.isEmpty() )
- {
- // Check if it's the same, Don't change if it is, as it'll cause flickering
- QStringList old;
- for ( int i = 0; i < m_combo->count(); i++ )
- old << m_combo->itemText( i );
- if ( list == old )
- return;
- }
- m_combo->hide();
- m_combo->clear();
- m_combo->addItems( list );
- if ( userSelected > -1 )
- m_combo->setCurrentIndex( userSelected );
- else if ( defaultIndex > -1 )
- m_combo->setCurrentIndex( defaultIndex );
- m_curIndex = m_model->index( m_combo->currentIndex(), 0, m_parentIndex );
- m_combo->show();
- m_combo->adjustSize();
- }
- void
- BreadcrumbButton::comboboxActivated( int idx )
- {
- m_model->setData( m_curIndex, false, Breadcrumb::UserSelectedRole );
- QModelIndex selected = m_model->index( idx, 0, m_parentIndex );
- m_curIndex = selected;
- m_model->setData( selected, true, Breadcrumb::UserSelectedRole );
- emit currentIndexChanged( selected );
- }
- bool
- BreadcrumbButton::hasChildren() const
- {
- return m_model->rowCount( m_model->index( m_combo->currentIndex(), 0, m_parentIndex ) ) > 0;
- }
- QModelIndex
- BreadcrumbButton::currentIndex() const
- {
- return m_model->index( m_combo->currentIndex(), 0, m_parentIndex );
- }