C++ Track::GetSelected方法代码示例

bool EffectAutoDuck::Init()
{
   mControlTrack = NULL;

   TrackListIterator iter(inputTracks());
   Track *t = iter.First();

   bool lastWasSelectedWaveTrack = false;
   const WaveTrack *controlTrackCandidate = NULL;

   while(t)
   {
      if (lastWasSelectedWaveTrack && !t->GetSelected() &&
          t->GetKind() == Track::Wave)
      {
         // This could be the control track, so remember it
         controlTrackCandidate = (WaveTrack*)t;
      }

      lastWasSelectedWaveTrack = false;

      if (t->GetSelected())
      {
         if (t->GetKind() == Track::Wave)
         {
            lastWasSelectedWaveTrack = true;
         }
         else
         {
            Effect::MessageBox(
               _("You selected a track which does not contain audio. AutoDuck can only process audio tracks."),
               /* i18n-hint: Auto duck is the name of an effect that 'ducks' (reduces the volume)
                * of the audio automatically when there is sound on another track.  Not as
                * in 'Donald-Duck'!*/
               wxICON_ERROR);
            return false;
         }
      }

      t = iter.Next();
   }

   if (!controlTrackCandidate)
   {
      Effect::MessageBox(
         _("Auto Duck needs a control track which must be placed below the selected track(s)."),
         wxICON_ERROR);
      return false;
   }

   mControlTrack = controlTrackCandidate;

   return true;
}

// Returns a state constant.
wxAccStatus TrackPanelAx::GetState( int childId, long* state )
{
#if defined(__WXMSW__)
   if( childId > 0 )
   {
      Track *t = FindTrack( childId );

      *state = wxACC_STATE_SYSTEM_FOCUSABLE | wxACC_STATE_SYSTEM_SELECTABLE;
      if (t)
      {
         if( t == mFocusedTrack )
         {
            *state |= wxACC_STATE_SYSTEM_FOCUSED;
         }

         if( t->GetSelected() )
         {
            *state |= wxACC_STATE_SYSTEM_SELECTED;
         }
      }
   }
   else     // childId == wxACC_SELF
   {
      *state = wxACC_STATE_SYSTEM_FOCUSABLE + wxACC_STATE_SYSTEM_FOCUSED;
   }
#endif

#if defined(__WXMAC__)
   *state = wxACC_STATE_SYSTEM_FOCUSABLE | wxACC_STATE_SYSTEM_SELECTABLE;

   if( childId > 0 )
   {
      Track *t = FindTrack( childId );

      if (t)
      {
         if( t == mFocusedTrack )
         {
            *state |= wxACC_STATE_SYSTEM_FOCUSED;
         }

         if( t->GetSelected() )
         {
            *state |= wxACC_STATE_SYSTEM_SELECTED;
         }
      }
   }
#endif

   return wxACC_OK;
}

//
// private methods
//
// Use these two methods to copy the input tracks to mOutputTracks, if 
// doing the processing on them, and replacing the originals only on success (and not cancel).
// Copy the group tracks that have tracks selected
void Effect::CopyInputTracks(int trackType)
{
   // Reset map
   mIMap.Clear();
   mOMap.Clear();

   mOutputTracks = new TrackList();
   mOutputTracksType = trackType;

   //iterate over tracks of type trackType (All types if Track::All)
   TrackListOfKindIterator aIt(trackType, mTracks);
   t2bHash added;

   for (Track *aTrack = aIt.First(); aTrack; aTrack = aIt.Next()) {

      // Include selected tracks, plus sync-lock selected tracks for Track::All.
      if (aTrack->GetSelected() ||
            (trackType == Track::All && aTrack->IsSyncLockSelected()))
      {
         Track *o = aTrack->Duplicate();
         mOutputTracks->Add(o);
         mIMap.Add(aTrack);
         mOMap.Add(o);
      }
   }
}

int TrackList::GetNumExportChannels(bool selectionOnly)
{
   /* counters for tracks panned different places */
   int numLeft = 0;
   int numRight = 0;
   int numMono = 0;
   /* track iteration kit */
   Track *tr;
   TrackListIterator iter;

   for (tr = iter.First(this); tr != NULL; tr = iter.Next()) {

      // Want only unmuted wave tracks.
      if ((tr->GetKind() != Track::Wave) || tr->GetMute())
         continue;

      // do we only want selected ones?
      if (selectionOnly && !(tr->GetSelected())) {
         //want selected but this one is not
         continue;
      }

      // Found a left channel
      if (tr->GetChannel() == Track::LeftChannel) {
         numLeft++;
      }

      // Found a right channel
      else if (tr->GetChannel() == Track::RightChannel) {
         numRight++;
      }

      // Found a mono channel, but it may be panned
      else if (tr->GetChannel() == Track::MonoChannel) {
         float pan = ((WaveTrack*)tr)->GetPan();

         // Figure out what kind of channel it should be
         if (pan == -1.0) {   // panned hard left
            numLeft++;
         }
         else if (pan == 1.0) {  // panned hard right
            numRight++;
         }
         else if (pan == 0) { // panned dead center
            numMono++;
         }
         else {   // panned somewhere else
            numLeft++;
            numRight++;
         }
      }
   }

   // if there is stereo content, report 2, else report 1
   if (numRight > 0 || numLeft > 0) {
      return 2;
   }

   return 1;
}

void FreqWindow::GetAudio()
{
   mData.reset();
   mDataLen = 0;

   int selcount = 0;
   bool warning = false;
   TrackListIterator iter(p->GetTracks());
   Track *t = iter.First();
   while (t) {
      if (t->GetSelected() && t->GetKind() == Track::Wave) {
         WaveTrack *track = (WaveTrack *)t;
         if (selcount==0) {
            mRate = track->GetRate();
            auto start = track->TimeToLongSamples(p->mViewInfo.selectedRegion.t0());
            auto end = track->TimeToLongSamples(p->mViewInfo.selectedRegion.t1());
            auto dataLen = end - start;
            if (dataLen > 10485760) {
               warning = true;
               mDataLen = 10485760;
            }
            else
               // dataLen is not more than 10 * 2 ^ 20
               mDataLen = dataLen.as_size_t();
            mData = Floats{ mDataLen };
            // Don't allow throw for bad reads
            track->Get((samplePtr)mData.get(), floatSample, start, mDataLen,
                       fillZero, false);
         }
         else {
            if (track->GetRate() != mRate) {
               AudacityMessageBox(_("To plot the spectrum, all selected tracks must be the same sample rate."));
               mData.reset();
               mDataLen = 0;
               return;
            }
            auto start = track->TimeToLongSamples(p->mViewInfo.selectedRegion.t0());
            Floats buffer2{ mDataLen };
            // Again, stop exceptions
            track->Get((samplePtr)buffer2.get(), floatSample, start, mDataLen,
                       fillZero, false);
            for (size_t i = 0; i < mDataLen; i++)
               mData[i] += buffer2[i];
         }
         selcount++;
      }
      t = iter.Next();
   }

   if (selcount == 0)
      return;

   if (warning) {
      wxString msg;
      msg.Printf(_("Too much audio was selected.  Only the first %.1f seconds of audio will be analyzed."),
                          (mDataLen / mRate));
      AudacityMessageBox(msg);
   }
}

// Gets the name of the specified object.
wxAccStatus TrackPanelAx::GetName( int childId, wxString* name )
{
#if defined(__WXMSW__)
   if( childId == wxACC_SELF )
   {
      *name = _( "TrackView" );
   }
   else
   {
      Track *t = FindTrack( childId );

      if( t == NULL )
      {
         return wxACC_FAIL;
      }
      else
      {
         *name = t->GetName();
         if( *name == t->GetDefaultName() )
         {
            /* i18n-hint: The %d is replaced by th enumber of the track.*/
            name->Printf(_("Track %d"), TrackNum( t ) );
         }

         // LLL: Remove these during "refactor"
         if( t->GetMute() )
         {
            /* i18n-hint: This is for screen reader software and indicates that
               on this track mute is on.*/
            *name->Append( _( " Mute On" ) );
         }
         
         if( t->GetSolo() )
         {
            /* i18n-hint: This is for screen reader software and indicates that
               on this track solo is on.*/
            *name->Append( _( " Solo On" ) );
         }
         if( t->GetSelected() )
         {
            /* i18n-hint: This is for screen reader software and indicates that
               this track is selected.*/
            *name->Append( _( " Select On" ) );
         }
      }
   }

   return wxACC_OK;
#endif

#if defined(__WXMAC__)
   return wxACC_NOT_IMPLEMENTED;
#endif
}

bool EffectReverse::Process()
{
   //Track::All is needed because Reverse should move the labels too
   this->CopyInputTracks(Track::All); // Set up mOutputTracks.
   bool bGoodResult = true;

   TrackListIterator iter(mOutputTracks);
   Track *t = iter.First();
   int count = 0;
   while (t) {
      if (t->GetKind() == Track::Wave &&
            (t->GetSelected() || t->IsSyncLockSelected()))
      {
         WaveTrack *track = (WaveTrack*)t;

         if (mT1 > mT0) {
            sampleCount start = track->TimeToLongSamples(mT0);
            sampleCount end = track->TimeToLongSamples(mT1);
            sampleCount len = (sampleCount)(end - start);

            if (!ProcessOneWave(count, track, start, len))
            {
               bGoodResult = false;
               break;
            }
         }
      }
      else if (t->GetKind() == Track::Label &&
            (t->GetSelected() || t->IsSyncLockSelected()))
      {
         LabelTrack *track = (LabelTrack*)t;
         track->ChangeLabelsOnReverse(mT0, mT1);
      }
      t = iter.Next();
      count++;
   }

   this->ReplaceProcessedTracks(bGoodResult); 
   return bGoodResult;
}

void ContrastDialog::OnUseSelectionB(wxCommandEvent & event)
{
   AudacityProject *p = GetActiveProject();
   TrackListIterator iter(p->GetTracks());
   Track *t = iter.First();
   while (t) {
      if (t->GetSelected() && t->GetKind() == Track::Wave) {
         mBackgroundStartT->SetTimeValue(p->mViewInfo.sel0);
         mBackgroundEndT->SetTimeValue(p->mViewInfo.sel1);
         break;
      }
      t = iter.Next();
   }
   bBGset = true;
   OnGetBackgroundDB(event);
}

void EditToolBar::EnableDisableButtons()
{
   AudacityProject *p = GetActiveProject();
   if (!p) return;

   // Is anything selected?
   bool selection = false;
   TrackListIterator iter(p->GetTracks());
   for (Track *t = iter.First(); t; t = iter.Next())
      if (t->GetSelected()) {
         selection = true;
         break;
      }
   selection &= (p->GetSel0() < p->GetSel1());

   mButtons[ETBCutID]->SetEnabled(selection);
   mButtons[ETBCopyID]->SetEnabled(selection);
   mButtons[ETBTrimID]->SetEnabled(selection);
   mButtons[ETBSilenceID]->SetEnabled(selection);

   mButtons[ETBUndoID]->SetEnabled(p->GetUndoManager()->UndoAvailable());
   mButtons[ETBRedoID]->SetEnabled(p->GetUndoManager()->RedoAvailable());

   bool tracks = (!p->GetTracks()->IsEmpty());

   mButtons[ETBZoomInID]->SetEnabled(tracks && (p->ZoomInAvailable()));
   mButtons[ETBZoomOutID]->SetEnabled(tracks && (p->ZoomOutAvailable()) );

   #if 0 // Disabled for version 1.2.0 since it doesn't work quite right...
   mButtons[ETBZoomToggleID]->SetEnabled(tracks);
   #endif

   mButtons[ETBZoomSelID]->SetEnabled(selection);
   mButtons[ETBZoomFitID]->SetEnabled(tracks);

   mButtons[ETBPasteID]->SetEnabled(p->Clipboard());

#ifdef EXPERIMENTAL_SYNC_LOCK
   bool bSyncLockTracks;
   gPrefs->Read(wxT("/GUI/SyncLockTracks"), &bSyncLockTracks, false);

   if (bSyncLockTracks)
      mButtons[ETBSyncLockID]->PushDown();
   else
      mButtons[ETBSyncLockID]->PopUp();
#endif
}

wxAccStatus TrackPanelAx::GetValue( int WXUNUSED(childId), wxString* WXUNUSED(strValue) )
#endif
{
#if defined(__WXMSW__)
   return wxACC_NOT_IMPLEMENTED;
#endif

#if defined(__WXMAC__)
   if( childId == wxACC_SELF )
   {
      *strValue = _( "TrackView" );
   }
   else
   {
      Track *t = FindTrack( childId );

      if( t == NULL )
      {
         return wxACC_FAIL;
      }
      else
      {
         *strValue = t->GetName();
         if( *strValue == t->GetDefaultName() )
         {
            strValue->Printf(_("Track %d"), TrackNum( t ) );
         }

         // LLL: Remove these during "refactor"
         if( t->GetMute() )
         {
            strValue->Append( _( " Mute On" ) );
         }

         if( t->GetSolo() )
         {
            strValue->Append( _( " Solo On" ) );
         }
         if( t->GetSelected() )
         {
            strValue->Append( _( " Select On" ) );
         }
      }
   }
   return wxACC_OK;
#endif
}

void TranscriptionToolBar::EnableDisableButtons()
{
#ifdef EXPERIMENTAL_VOICE_DETECTION
   AudacityProject *p = GetActiveProject();
   if (!p) return;
   // Is anything selected?
   bool selection = false;
   TrackListIterator iter(p->GetTracks());
   for (Track *t = iter.First(); t; t = iter.Next())
      if (t->GetSelected()) {
         selection = true;
         break;
      }
   selection &= (p->GetSel0() < p->GetSel1());

   mButtons[TTB_Calibrate]->SetEnabled(selection);
#endif
}

// Gets the name of the specified object.
wxAccStatus TrackPanelAx::GetName( int childId, wxString* name )
{
   if( childId == wxACC_SELF )
   {
      *name = _( "TrackView" );
   }
   else
   {
      Track *t = FindTrack( childId );

      if( t == NULL )
      {
         *name = _( "Track Accessible out of sync" );
         return wxACC_FAIL;
      }
      else
      {
         *name = t->GetName();
         if( *name == t->GetDefaultName() )
         {
            name->Printf(_("Track %d"), TrackNum( t ) );
         }

         // LLL: Remove these during "refactor"
         if( t->GetMute() )
         {
            *name->Append( _( " Mute On" ) );
         }
         
         if( t->GetSolo() )
         {
            *name->Append( _( " Solo On" ) );
         }
         if( t->GetSelected() )
         {
            *name->Append( _( " Select On" ) );
         }
      }
   }

   return wxACC_OK;
}

bool EffectSilence::Process()
{
   double length = mT1 - mT0;

   if (length <= 0.0)
      length = sDefaultGenerateLen;

   //Iterate over each track
   TrackListIterator iter(mTracks);
   Track *track = iter.First();
   while (track) {
      if (track->GetSelected())
         track->InsertSilence(mT0, length);
      
      //Iterate to the next track
      track = iter.Next();
   }

   return true;
}

void OnToggle(const CommandContext &context)
{
   auto &project = context.project;
   auto trackPanel = project.GetTrackPanel();
   auto &selectionState = project.GetSelectionState();

   Track *t;

   t = trackPanel->GetFocusedTrack();   // Get currently focused track
   if (!t)
      return;

   selectionState.SelectTrack
      ( *t, !t->GetSelected(), true );
   trackPanel->EnsureVisible( t );
   project.ModifyState(false);

   trackPanel->GetAx().Updated();

   return;
}

void Effect::CountWaveTracks()
{
   mNumTracks = 0;
   mNumGroups = 0;

   TrackListOfKindIterator iter(Track::Wave, mTracks);
   Track *t = iter.First();

   while(t) {
      if (!t->GetSelected()) {
         t = iter.Next();
         continue;
      }
      
      if (t->GetKind() == Track::Wave) {
         mNumTracks++;
         if (!t->GetLinked())
            mNumGroups++;
      }
      t = iter.Next();
   }
}