sd/source/ui/slidesorter/inc/controller/SlsSelectionObserver.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  19
  20 #ifndef INCLUDED_SD_SOURCE_UI_SLIDESORTER_INC_CONTROLLER_SLSSELECTIONOBSERVER_HXX
  21 #define INCLUDED_SD_SOURCE_UI_SLIDESORTER_INC_CONTROLLER_SLSSELECTIONOBSERVER_HXX
  22
  23 #include <sal/types.h>
  24 #include <vector>
  25 #include <boost/shared_ptr.hpp>
  26
  27 namespace sd { namespace slidesorter {
  28 class SlideSorter;
  29 } }
  30
  31 class SdDrawDocument;
  32 class SdrPage;
  33
  34 namespace sd { namespace slidesorter { namespace controller {
  35
  36 /** Observe insertions and deletions of pages between calls to
  37     StartObservation() and EndObservation().  When the later is called
  38     the selection is set to just the newly inserted pages.
  39 */
  40 class SelectionObserver
  41 {
  42 public:
  43     SelectionObserver (SlideSorter& rSlideSorter);
  44     virtual ~SelectionObserver();
  45
  46     void NotifyPageEvent (const SdrPage* pPage);
  47     void StartObservation();
  48     void AbortObservation();
  49     void EndObservation();
  50
  51     /** Use this little class instead of calling StartObservation and
  52         EndObservation directly so that EndObservation is not forgotten or
  53         omitted due to an exception or some break or return in the middle of
  54         code.
  55     */
  56     class Context
  57     {
  58     public:
  59         Context (SlideSorter& rSlideSorter);
  60         ~Context();
  61         void Abort();
  62     private:
  63         ::boost::shared_ptr<SelectionObserver> mpSelectionObserver;
  64     };
  65
  66 private:
  67     SlideSorter& mrSlideSorter;
  68     bool mbIsOvservationActive;
  69
  70     ::std::vector<const SdPage*> maInsertedPages;
  71     ::std::vector<sal_Int32> maDeletedPages;
  72 };
  73
  74 } } } // end of namespace ::sd::slidesorter::controller
  75
  76 #endif
  77
  78 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */