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tomahawk/src/libtomahawk/widgets/BreadcrumbButton.cpp

180 lines
5.1 KiB
C++

/* === 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/stylehelper.h"
#include "utils/tomahawkutils.h"
#include <QPaintEvent>
#include <QPainter>
#include <QHBoxLayout>
using namespace Tomahawk;
BreadcrumbButton::BreadcrumbButton( Breadcrumb* parent, QAbstractItemModel* model )
: QWidget( parent )
, m_breadcrumb( parent )
, m_model( model )
, m_combo( new ComboBox( this ) )
{
setLayout( new QHBoxLayout );
layout()->setContentsMargins( 0, 0, 0, 0 );
layout()->setSpacing( 0 );
layout()->addWidget( m_combo );
setFixedHeight( TomahawkUtils::headerHeight() );
m_combo->setSizeAdjustPolicy( QComboBox::AdjustToContents );
setSizePolicy( QSizePolicy::Minimum, QSizePolicy::Expanding );
connect( m_combo, SIGNAL( activated( int ) ), SLOT( comboboxActivated( int ) ) );
}
void
BreadcrumbButton::paintEvent( QPaintEvent* )
{
QPainter p( this );
QStyleOption opt;
opt.initFrom( this );
QRect r = rect();
StyleHelper::horizontalHeader( &p, r ); // draw the background
qDebug() << "BREADCRUMBBUTTON PAINTING IN:" << r << mapToParent( r.topLeft() ) << m_curIndex.data();
if( !hasChildren() )
return;
bool reverse = opt.direction == Qt::RightToLeft;
int menuButtonWidth = 12;
int rightSpacing = 10;
int left = !reverse ? r.right()-rightSpacing - menuButtonWidth : r.left();
int right = !reverse ? r.right()-rightSpacing : r.left() + menuButtonWidth;
int height = r.height();
QRect arrowRect( ( left + right ) / 2 + ( reverse ? 6 : -6 ), 0, height, height );
QStyleOption arrowOpt = opt;
arrowOpt.rect = arrowRect;
QLine l1( left, 0, right, height/2 );
QLine l2( left, 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 );
}
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.count() )
{
// 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 );
}