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qd_thumb.h

//C-  -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002  Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001  AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, either Version 2 of the license,
//C- or (at your option) any later version. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//C- GNU General Public License for more details.
//C- 
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library from
//C- Lizardtech Software.  Lizardtech Software has authorized us to
//C- replace the original DjVu(r) Reference Library notice by the following
//C- text (see doc/lizard2002.djvu and doc/lizardtech2007.djvu):
//C-
//C-  ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, either Version 2 of the license,
//C- | or (at your option) any later version. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE."  Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free, 
//C- | non-exclusive license to make, use, sell, or otherwise dispose of 
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the 
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU 
//C- | General Public License.   This grant only confers the right to 
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to 
//C- | the extent such infringement is reasonably necessary to enable 
//C- | recipient to make, have made, practice, sell, or otherwise dispose 
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to 
//C- | any greater extent that may be necessary to utilize further 
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
// 
// $Id: qd_thumb.h,v 1.10 2007/03/25 20:48:27 leonb Exp $
// $Name: debian_version_3_5_20-7 $

#ifndef HDR_QD_THUMB
#define HDR_QD_THUMB
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma interface
#endif


#include "qd_port.h"
#include "GContainer.h"

#include <qlistbox.h>
#include <qcursor.h>



class QDThumbnails : public QListBox
{
   Q_OBJECT
   friend class QDThumbItem;
private:
   class Pending : public GPEnabled
   {
   public:
      int         page;
      GP<DataPool>      pool;
      Pending(int _page, const GP<DataPool> & _pool) 
        : page(_page), pool(_pool) {}
   };
   GP<DjVuDocument>     doc;
   QDPort         port;
   QDMessenger          messenger;
   bool                 need_rescan;
   GArray<QPixmap>      pixmaps_arr;
   GList<int>           pixmaps_list;
   GPList<Pending>      pending_list;

   QCursor  normalCursor;
   bool           fast_mode;
   int            cur_page_num;
   bool         rowMajor;
   int          min_list_width;
   int          max_list_width;
   
   QPixmap  getImage(int page_num, int width, int height);
   static void    trigger_cb(void * cl_data);
private slots:
   void           slotNotifyFileFlagsChanged(const GP<DjVuFile> & source,
                                 long set_mask, long clr_mask);
   void           slotNotifyDocFlagsChanged(const GP<DjVuDocument> & source,
                                long set_mask, long clr_mask);
   void           slotTriggerCB(int);
   void         slotGotoPage(QListBoxItem *);
protected:
   virtual void   resizeEvent(QResizeEvent * ev);
   virtual void   dataSet(int page_num, const TArray<char> & data) {}
   void           setData(int page_num, const TArray<char> & data);
   bool           getDataForPage(int page_num);
   void           getDataForNextPage(void);
signals:
   void           sigGotoPage(int page_num);
   void           sigCloseThumbnails(void);
public slots:
   void           slotReloadPage(int page_num) { reloadPage(page_num); }
public:
   virtual QSize sizeHint(void) const;
   virtual void   show(void);
   
   void           rescan(void);
      // Will clear data for page 'page_num' and request it from DjVuDocument
      // again. fast_mode will be used to determine if DjVuDocument should
      // decode the file or just return predecoded data (if any)
   void           reloadPage(int page_num);

   void           rereadGamma(void);
   void           setFastMode(bool en);
   void           setDjVuDocument(GP<DjVuDocument> & doc);
   virtual void   setCurPageNum(int cur_page_num);

   QDThumbnails(QWidget * parent=0, const char * name=0, bool _rowMajor=FALSE);
   ~QDThumbnails(void) {}
};

#endif

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