C++ Track::GetLink方法代码示例

// Gets the number of children.
wxAccStatus TrackPanelAx::GetChildCount( int* childCount )
{
   TrackListIterator iter( mTrackPanel->mTracks );
   Track *t = iter.First();
   int cnt = 0;

   while( t != NULL )
   {
      cnt++;

      if( t->GetLink() != NULL )
      {
         t = iter.Next();
      }

      t = iter.Next();
   }

   *childCount = cnt;

   return wxACC_OK;
}

void ControlToolBar::SetupCutPreviewTracks(double WXUNUSED(playStart), double cutStart,
                                           double cutEnd, double  WXUNUSED(playEnd))
{
   ClearCutPreviewTracks();
   AudacityProject *p = GetActiveProject();
   if (p) {
      // Find first selected track (stereo or mono) and duplicate it
      Track *track1 = NULL, *track2 = NULL;
      TrackListIterator it(p->GetTracks());
      for (Track *t = it.First(); t; t = it.Next())
      {
         if (t->GetKind() == Track::Wave && t->GetSelected())
         {
            track1 = t;
            track2 = t->GetLink();
            break;
         }
      }

      if (track1)
      {
         // Duplicate and change tracks
         auto new1 = track1->Duplicate();
         new1->Clear(cutStart, cutEnd);
         decltype(new1) new2{};
         if (track2)
         {
            new2 = track2->Duplicate();
            new2->Clear(cutStart, cutEnd);
         }

         mCutPreviewTracks = new TrackList();
         mCutPreviewTracks->Add(std::move(new1));
         if (track2)
            mCutPreviewTracks->Add(std::move(new2));
      }
   }
}

TrackPanelResizeHandle::TrackPanelResizeHandle
( const std::shared_ptr<Track> &track, int y, const AudacityProject *pProject )
   : mpTrack{ track }
   , mMouseClickY( y )
{
   auto tracks = pProject->GetTracks();
   Track *prev = tracks->GetPrev(track.get());
   Track *next = tracks->GetNext(track.get());

   //STM:  Determine whether we should rescale one or two tracks
   if (prev && prev->GetLink() == track.get()) {
      // mpTrack is the lower track
      mInitialTrackHeight = track->GetHeight();
      mInitialActualHeight = track->GetActualHeight();
      mInitialMinimized = track->GetMinimized();
      mInitialUpperTrackHeight = prev->GetHeight();
      mInitialUpperActualHeight = prev->GetActualHeight();
      mMode = IsResizingBelowLinkedTracks;
   }
   else if (next && track->GetLink() == next) {
      // mpTrack is the upper track
      mInitialTrackHeight = next->GetHeight();
      mInitialActualHeight = next->GetActualHeight();
      mInitialMinimized = next->GetMinimized();
      mInitialUpperTrackHeight = track->GetHeight();
      mInitialUpperActualHeight = track->GetActualHeight();
      mMode = IsResizingBetweenLinkedTracks;
   }
   else {
      // DM: Save the initial mouse location and the initial height
      mInitialTrackHeight = track->GetHeight();
      mInitialActualHeight = track->GetActualHeight();
      mInitialMinimized = track->GetMinimized();
      mMode = IsResizing;
   }
}

bool EffectTruncSilence::ProcessIndependently()
{
   unsigned nGroups = 0;

   const bool syncLock = ::GetActiveProject()->IsSyncLocked();

   // Check if it's permissible
   {
      SelectedTrackListOfKindIterator iter(Track::Wave, mTracks);
      for (Track *track = iter.First(); track;
         track = iter.Next(true) // skip linked tracks
      ) {
         if (syncLock) {
            Track *const link = track->GetLink();
            SyncLockedTracksIterator syncIter(mTracks);
            for (Track *track2 = syncIter.StartWith(track); track2; track2 = syncIter.Next()) {
               if (track2->GetKind() == Track::Wave &&
                  !(track2 == track || track2 == link) &&
                  track2->GetSelected()) {
                  ::wxMessageBox(_("When truncating independently, there may only be one selected audio track in each sync-lock group."));
                  return false;
               }
            }
         }

         ++nGroups;
      }
   }

   if (nGroups == 0)
      // nothing to do
      return true;

   // Now do the work

   // Copy tracks
   CopyInputTracks(Track::All);
   double newT1 = 0.0;

   {
      unsigned iGroup = 0;
      SelectedTrackListOfKindIterator iter(Track::Wave, mOutputTracks);
      for (Track *track = iter.First(); track;
         ++iGroup, track = iter.Next(true) // skip linked tracks
      ) {
         Track *const link = track->GetLink();
         Track *const last = link ? link : track;

         RegionList silences;

         if (!FindSilences(silences, track, last))
            return false;
         // Treat tracks in the sync lock group only
         Track *groupFirst, *groupLast;
         if (syncLock) {
            SyncLockedTracksIterator syncIter(mOutputTracks);
            groupFirst = syncIter.StartWith(track);
            groupLast = syncIter.Last();
         }
         else {
            groupFirst = track;
            groupLast = last;
         }
         double totalCutLen = 0.0;
         if (!DoRemoval(silences, iGroup, nGroups, groupFirst, groupLast, totalCutLen))
            return false;
         newT1 = std::max(newT1, mT1 - totalCutLen);
      }
   }

   mT1 = newT1;

   return true;
}