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TabBar.cpp
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TabBar.cpp
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/*
* TabBar.cpp - implementation of tab-bar
*
* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
*
* This file is part of LMMS - https://lmms.io
*
* 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#include "TabBar.h"
#include "TabButton.h"
namespace lmms::gui
{
TabBar::TabBar( QWidget * _parent, QBoxLayout::Direction _dir ) :
QWidget( _parent ),
m_layout( new QBoxLayout( _dir, this ) ),
m_exclusive( false )
{
m_layout->setContentsMargins(8, 8, 8, 8);
m_layout->setSpacing( 0 );
setLayout( m_layout );
}
TabButton * TabBar::addTab( QWidget * _w, const QString & _text, int _id,
bool _add_stretch, bool _text_is_tooltip, bool fixWidgetToParentSize )
{
// already tab with id?
if( m_tabs.contains( _id ) )
{
// then remove it
removeTab( _id );
}
QString caption = ( _text_is_tooltip ) ? QString( "" ) : _text;
// create tab-button
auto b = new TabButton(caption, _id, this);
connect( b, SIGNAL(clicked(int)), this, SLOT(tabClicked(int)));
b->setIconSize( QSize( 48, 48 ) );
b->setFixedSize( 64, 64 );
b->show();
if( _text_is_tooltip )
{
b->setToolTip(_text);
}
// small workaround, because QBoxLayout::addWidget(...) doesn't
// work properly, so we first have to remove all tabs from the
// layout and them add them in the correct order
QMap<int, QPair<TabButton *, QWidget *> >::iterator it;
for( it = m_tabs.begin(); it != m_tabs.end(); ++it )
{
m_layout->removeWidget( it.value().first );
}
m_tabs.insert( _id, qMakePair( b, _w ) );
for( it = m_tabs.begin(); it != m_tabs.end(); ++it )
{
m_layout->addWidget( it.value().first );
}
if( _add_stretch )
{
m_layout->addStretch();
}
if (fixWidgetToParentSize)
{
// we assume, parent-widget is a widget acting as widget-stack so all
// widgets have the same size and only the one on the top is visible
_w->setFixedSize( _w->parentWidget()->size() );
}
return( b );
}
void TabBar::removeTab( int _id )
{
// find tab-button and delete it
if( m_tabs.find( _id ) != m_tabs.end() )
{
delete m_tabs[_id].first;
m_tabs.erase( m_tabs.find( _id ) );
}
}
void TabBar::setActiveTab( int _id )
{
setTabState( _id, true );
hideAll( _id );
if( allHidden() )
{
emit allWidgetsHidden();
}
else
{
emit widgetShown();
}
}
int TabBar::activeTab()
{
QMap<int, QPair<TabButton *, QWidget *> >::iterator it;
for( it = m_tabs.begin(); it != m_tabs.end(); ++it )
{
if( tabState( it.key() ) == true )
{
return( it.key() );
}
}
return( -1 );
}
bool TabBar::tabState( int _id )
{
if( m_tabs.find( _id ) == m_tabs.end() )
{
return( false );
}
return( m_tabs[_id].first->isChecked() );
}
void TabBar::setTabState( int _id, bool _checked )
{
if( m_tabs.find( _id ) != m_tabs.end() )
{
m_tabs[_id].first->setChecked( _checked );
}
}
void TabBar::hideAll( int _exception )
{
QMap<int, QPair<TabButton *, QWidget *> >::iterator it;
for( it = m_tabs.begin(); it != m_tabs.end(); ++it )
{
if( it.key() != _exception )
{
setTabState( it.key(), false );
}
it.value().second->hide();
}
if( m_tabs.find( _exception ) != m_tabs.end() )
{
if( tabState( _exception ) )
{
m_tabs[_exception].second->show();
}
else
{
m_tabs[_exception].second->hide();
}
}
}
void TabBar::tabClicked( int _id )
{
if( m_exclusive == true && activeTab() == -1 )
{
setActiveTab( _id );
}
else
{
bool all_hidden_before = allHidden();
// disable tabbar-buttons except the one clicked
hideAll( _id );
bool now_hidden = allHidden();
if( all_hidden_before == true && now_hidden == false )
{
emit widgetShown();
}
else if( all_hidden_before == false && now_hidden == true )
{
emit allWidgetsHidden();
}
}
}
bool TabBar::allHidden()
{
QMap<int, QPair<TabButton *, QWidget *> >::iterator it;
for( it = m_tabs.begin(); it != m_tabs.end(); ++it )
{
if( !it.value().second->isHidden() )
{
return( false );
}
}
return( true );
}
} // namespace lmms::gui