plasma-framework/applet.cpp

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/*
* Copyright (C) 2005 by Aaron Seigo <aseigo@kde.org>
*
* This program 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 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 Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <QEvent>
#include <QList>
#include <QSize>
#include <QStringList>
#include <QTimer>
#include <KPluginInfo>
#include <KStandardDirs>
#include <KService>
#include "applet.h"
#include "interface.h"
namespace Plasma
{
class Applet::Private
{
public:
Private( KService::Ptr appletDescription, int uniqueID )
: appletId( uniqueID ),
globalConfig( 0 ),
appletConfig( 0 ),
appletDescription( new KPluginInfo( appletDescription ) )
{ }
~Private()
{
foreach ( const QString& engine, loadedEngines ) {
Interface::self()->unloadDataEngine( engine );
}
delete appletDescription;
}
int appletId;
KSharedConfig::Ptr globalConfig;
KSharedConfig::Ptr appletConfig;
KPluginInfo* appletDescription;
QList<QObject*> watchedForFocus;
QStringList loadedEngines;
};
Applet::Applet( QGraphicsItem *parent,
QString serviceID,
int appletId )
: QWidget( 0 ),
QGraphicsItemGroup( parent )
{
KService::Ptr service = KService::serviceByStorageId( serviceID );
d = new Private( service, appletId );
}
Applet::~Applet()
{
needsFocus( false );
delete d;
}
KSharedConfig::Ptr Applet::appletConfig() const
{
if ( !d->appletConfig ) {
QString file = KStandardDirs::locateLocal( "appdata",
"applets/" + instanceName() + "rc",
true );
d->appletConfig = KSharedConfig::openConfig( file );
}
return d->appletConfig;
}
KSharedConfig::Ptr Applet::globalAppletConfig() const
{
if ( !d->globalConfig ) {
QString file = KStandardDirs::locateLocal( "config", "plasma_" + globalName() + "rc" );
d->globalConfig = KSharedConfig::openConfig( file );
}
return d->globalConfig;
}
bool Applet::loadDataEngine( const QString& name )
{
if ( d->loadedEngines.indexOf( name ) != -1 ) {
return true;
}
if ( Plasma::Interface::self()->loadDataEngine( name ) ) {
d->loadedEngines.append( name );
return true;
}
return false;
}
void Applet::constraintsUpdated()
{
}
QString Applet::globalName() const
{
return d->appletDescription->service()->library();
}
QString Applet::instanceName() const
{
return d->appletDescription->service()->library() + QString::number( d->appletId );
}
void Applet::watchForFocus(QObject *widget, bool watch)
{
if ( !widget ) {
return;
}
int index = d->watchedForFocus.indexOf(widget);
if ( watch ) {
if ( index == -1 ) {
d->watchedForFocus.append( widget );
widget->installEventFilter( this );
}
} else if ( index != -1 ) {
d->watchedForFocus.removeAt( index );
widget->removeEventFilter( this );
}
}
void Applet::needsFocus( bool focus )
{
if ( focus == QWidget::hasFocus() ||
focus == QGraphicsItem::hasFocus() ) {
return;
}
emit requestFocus(focus);
}
bool Applet::eventFilter( QObject *o, QEvent * e )
{
if ( !d->watchedForFocus.contains( o ) )
{
if ( e->type() == QEvent::MouseButtonRelease ||
e->type() == QEvent::FocusIn ) {
needsFocus( true );
} else if ( e->type() == QEvent::FocusOut ) {
needsFocus( false );
}
}
return QWidget::eventFilter( o, e );
}
} // Plasma namespace
#include "applet.moc"