1 files changed, 92 insertions, 0 deletions
diff --git a/kghostview/thumbnailservice.h b/kghostview/thumbnailservice.h
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+++ b/kghostview/thumbnailservice.h
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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
+