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/*
This file is part of the Nepomuk KDE project.
Copyright (C) 2007 Sebastian Trueg <[email protected]>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "resourcetaggingwidget.h"
#include "tagcloud.h"
#include "taggingpopup.h"
#include <QtGui/QVBoxLayout>
#include <QtGui/QContextMenuEvent>
#include <QtGui/QCursor>
#include <QtGui/QLabel>
#include <QtCore/QSet>
#include <KLocale>
namespace Nepomuk {
inline uint qHash( const Tag& res )
{
return qHash( res.resourceUri().toString() );
}
}
class Nepomuk::ResourceTaggingWidget::Private
{
public:
QList<Nepomuk::Resource> resources;
TagCloud* resourceTagCloud;
TaggingPopup* popup;
QList<Tag> resourceTags;
void showTaggingPopup( const QPoint& );
void _k_slotShowTaggingPopup();
static QList<Tag> intersectTags( const QList<Resource>& );
};
void Nepomuk::ResourceTaggingWidget::Private::showTaggingPopup( const QPoint& pos )
{
popup->showAllTags();
resourceTags = intersectTags( resources );
Q_FOREACH( const Tag &tag, resourceTags ) {
popup->setTagSelected( tag, true );
}
popup->exec( pos );
foreach( Resource res, resources ) {
res.setTags( resourceTags );
}
resourceTagCloud->showTags( resourceTags );
}
void Nepomuk::ResourceTaggingWidget::Private::_k_slotShowTaggingPopup()
{
showTaggingPopup( QCursor::pos() );
}
QList<Nepomuk::Tag> Nepomuk::ResourceTaggingWidget::Private::intersectTags( const QList<Resource>& res )
{
if ( res.count() == 1 ) {
return res.first().tags();
}
else if ( !res.isEmpty() ) {
// determine the tags used for all resources
QSet<Tag> tags = QSet<Tag>::fromList( res.first().tags() );
QList<Resource>::const_iterator it = res.begin();
for ( ++it; it != res.end(); ++it ) {
tags.intersect( QSet<Tag>::fromList( (*it).tags() ) );
}
return tags.values();
}
else {
return QList<Tag>();
}
}
Nepomuk::ResourceTaggingWidget::ResourceTaggingWidget( QWidget* parent )
: QWidget( parent ),
d( new Private() )
{
QVBoxLayout* layout = new QVBoxLayout( this );
layout->setMargin( 0 );
d->resourceTagCloud = new TagCloud( this );
layout->addWidget( d->resourceTagCloud );
QLabel* changeTagsLabel = new QLabel( "<p align=center><a style=\"font-size:small;\" href=\"dummy\">" + i18nc( "@label", "Change tags..." ) + "</a>", this );
connect( changeTagsLabel, SIGNAL( linkActivated( const QString ) ),
this, SLOT( _k_slotShowTaggingPopup() ) );
layout->addWidget( changeTagsLabel );
// the popup tag cloud
d->popup = new TaggingPopup;
d->popup->setSelectionEnabled( true );
d->popup->setNewTagButtonEnabled( true );
connect( d->popup, SIGNAL( tagToggled( const Nepomuk::Tag&, bool ) ),
this, SLOT( slotTagToggled( const Nepomuk::Tag&, bool ) ) );
connect( d->popup, SIGNAL( tagAdded( const Nepomuk::Tag& ) ),
this, SLOT( slotTagAdded( const Nepomuk::Tag& ) ) );
connect( d->resourceTagCloud, SIGNAL( tagClicked( const Nepomuk::Tag& ) ),
this, SIGNAL( tagClicked( const Nepomuk::Tag& ) ) );
}
Nepomuk::ResourceTaggingWidget::~ResourceTaggingWidget()
{
delete d->popup;
delete d;
}
void Nepomuk::ResourceTaggingWidget::setResource( const Nepomuk::Resource& res )
{
setResources( QList<Resource>() << res );
}
void Nepomuk::ResourceTaggingWidget::setResources( const QList<Nepomuk::Resource>& resList )
{
d->resources = resList;
d->resourceTagCloud->showTags( d->intersectTags( resList ) );
}
void Nepomuk::ResourceTaggingWidget::slotTagToggled( const Nepomuk::Tag& tag, bool enabled )
{
if ( enabled ) {
d->resourceTags.append( tag );
}
else {
d->resourceTags.removeAll( tag );
}
d->popup->hide();
}
void Nepomuk::ResourceTaggingWidget::slotTagAdded( const Nepomuk::Tag& tag )
{
// assign it right away
d->resourceTags.append( tag );
// d->resource.addTag( tag );
}
void Nepomuk::ResourceTaggingWidget::contextMenuEvent( QContextMenuEvent* e )
{
d->showTaggingPopup( e->globalPos() );
}
#include "resourcetaggingwidget.moc"
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