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#ifndef THUMBNAILSERVICE_H
#define THUMBNAILSERVICE_H
/**
* Copyright (C) 1997-2003 the KGhostView authors. See file AUTHORS.
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <set>
#include <qobject.h>
#include <qpixmap.h>
#include <qguardedptr.h>
#include <stdio.h>
class KPSWidget;
class KGVMiniWidget;
class QTimer;
class ThumbnailService : public QObject {
Q_OBJECT
public:
ThumbnailService( KGVMiniWidget* parent, const char* name = 0 );
~ThumbnailService();
public slots:
void delayedGetThumbnail( int page, QObject* receiver, const char* slot, bool urgent = false );
/**
* Cancels the request matching the signature below.
*
* @param page the page of the request. Use "-1" for wildcard
* @param receiver the receiver. Use null for wildcard
* @param slot Use null for wildcard
*/
void cancelRequests( int page, QObject* receiver, const char* slot);
void reset();
/**
* This "suspends" the service.
* Unlike @ref reset(), if you call setEnabled( false ),
* old requests will be kept and will be serviced when
* you call setEnabled( true ) later.
*/
void setEnabled( bool );
signals:
/**
* Don't connect to this directly
*/
void relayPixmap( QPixmap );
private slots:
void slotDone( QPixmap );
void processOne();
private:
struct Request {
Request( int p, QObject* r, const char* s ) :
page( p ), receiver( r ), slot( s ), urgent( false ) { }
Request( int p, QObject* r, const char* s, bool u ) :
page( p ), receiver( r ), slot( s ), urgent( u ) { }
int page;
QObject* receiver;
const char* slot;
bool urgent;
bool operator < ( Request ) const;
};
static bool pageCmp( Request, Request );
std::set<Request> pending;
QGuardedPtr<KPSWidget> _thumbnailDrawer;
KGVMiniWidget* _mini;
QTimer* timer_;
bool _busy;
bool _enabled;
};
// vim:sw=4:sts=4:ts=8:sta:tw=78:noet
#endif // THUMBNAILSERVICE_H
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