src/apps/showimage/ImageFileNavigator.h

   1 /*
   2  * Copyright 2003-2010, Haiku, Inc. All Rights Reserved.
   3  * Copyright 2004-2005 yellowTAB GmbH. All Rights Reserverd.
   4  * Copyright 2006 Bernd Korz. All Rights Reserved
   5  * Distributed under the terms of the MIT License.
   6  *
   7  * Authors:
   8  *              Fernando Francisco de Oliveira
   9  *              Michael Wilber
  10  *              Michael Pfeiffer
  11  *              yellowTAB GmbH
  12  *              Bernd Korz
  13  *              Stephan Aßmus <superstippi@gmx.de>
  14  */
  15 #ifndef IMAGE_FILE_NAVIGATOR_H
  16 #define IMAGE_FILE_NAVIGATOR_H
  17
  18
  19 #include <Entry.h>
  20 #include <Messenger.h>
  21 #include <String.h>
  22
  23
  24 class Navigator;
  25
  26
  27 class ImageFileNavigator {
  28 public:
  29                                                                 ImageFileNavigator(const entry_ref& ref,
  30                                                                         const BMessenger& trackerMessenger);
  31         virtual                                         ~ImageFileNavigator();
  32
  33                         void                            SetTo(const entry_ref& ref, int32 page = 1,
  34                                                                         int32 pageCount = 1);
  35                         const entry_ref&        CurrentRef() const { return fCurrentRef; }
  36
  37                         // The same image file may have multiple pages, TIFF images for
  38                         // example. The page count is determined at image loading time.
  39                         int32                           CurrentPage();
  40                         int32                           PageCount();
  41
  42                         bool                            FirstPage();
  43                         bool                            LastPage();
  44                         bool                            NextPage();
  45                         bool                            PreviousPage();
  46                         bool                            HasNextPage();
  47                         bool                            HasPreviousPage();
  48                         bool                            GoToPage(int32 page);
  49
  50                         bool                            FirstFile();
  51                         bool                            NextFile();
  52                         bool                            PreviousFile();
  53                         bool                            HasNextFile();
  54                         bool                            HasPreviousFile();
  55
  56                         bool                            GetNextFile(const entry_ref& ref,
  57                                                                         entry_ref& nextRef);
  58                         bool                            GetPreviousFile(const entry_ref& ref,
  59                                                                         entry_ref& previousRef);
  60
  61                         bool                            MoveFileToTrash();
  62
  63 private:
  64                         Navigator*                      fNavigator;
  65
  66                         entry_ref                       fCurrentRef;
  67                         int32                           fDocumentIndex;
  68                                 // of the image in the file
  69                         int32                           fDocumentCount;
  70                                 // number of images in the file
  71
  72                         BString                         fImageType;
  73                                 // Type of image, for use in status bar and caption
  74                         BString                         fImageMime;
  75 };
  76
  77
  78 #endif  // IMAGE_FILE_NAVIGATOR_H