SelectionStateChanger Class Reference

#include <SelectionState.h>

Collaboration diagram for SelectionStateChanger:

Public Member Functions
	SelectionStateChanger (SelectionState &state, TrackList &tracks)
	SelectionStateChanger (const SelectionStateChanger &)=delete
SelectionStateChanger &	operator= (const SelectionStateChanger &)=delete
	~SelectionStateChanger ()
void	Commit ()

Private Attributes
SelectionState *	mpState
TrackList &	mTracks
std::weak_ptr< Track >	mInitialLastPickedTrack
std::vector< bool >	mInitialTrackSelection

Detailed Description

Definition at line 55 of file SelectionState.h.

Constructor & Destructor Documentation

SelectionStateChanger() [1/2]

SelectionStateChanger::SelectionStateChanger	(	SelectionState &	state,
		TrackList &	tracks
	)

Definition at line 144 of file SelectionState.cpp.

   : mpState{ &state }
   , mTracks{ tracks }
   , mInitialLastPickedTrack{ state.mLastPickedTrack }
{
   // Save initial state of track selections
   const auto range = tracks.Leaders();
   mInitialTrackSelection.clear();
   mInitialTrackSelection.reserve(range.size());
   for (const auto track : range) {
      const bool isSelected = track->GetSelected();
      mInitialTrackSelection.push_back(isSelected);
   }
}

References TrackList::Leaders(), and mInitialTrackSelection.

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SelectionStateChanger() [2/2]

SelectionStateChanger::SelectionStateChanger ( const SelectionStateChanger &  )

delete

~SelectionStateChanger()

SelectionStateChanger::~SelectionStateChanger

(

)

Definition at line 160 of file SelectionState.cpp.

{
   if ( mpState ) {
      // roll back changes
      mpState->mLastPickedTrack = mInitialLastPickedTrack;
      std::vector<bool>::const_iterator
         it = mInitialTrackSelection.begin(),
         end = mInitialTrackSelection.end();
 
      for (auto track : mTracks.Leaders()) {
         if (it == end)
            break;
         track->SetSelected( *it++ );
      }
   }
}

References PackedArray::end(), TrackList::Leaders(), mInitialLastPickedTrack, mInitialTrackSelection, SelectionState::mLastPickedTrack, mpState, and mTracks.

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Member Function Documentation

Commit()

void SelectionStateChanger::Commit

(

)

Definition at line 177 of file SelectionState.cpp.

{
   mpState = nullptr;
}

References mpState.

operator=()

SelectionStateChanger & SelectionStateChanger::operator= ( const SelectionStateChanger &  )

delete

Member Data Documentation

mInitialLastPickedTrack

std::weak_ptr<Track> SelectionStateChanger::mInitialLastPickedTrack

private

Definition at line 68 of file SelectionState.h.

Referenced by ~SelectionStateChanger().

mInitialTrackSelection

std::vector<bool> SelectionStateChanger::mInitialTrackSelection

private

Definition at line 69 of file SelectionState.h.

Referenced by SelectionStateChanger(), and ~SelectionStateChanger().

mpState

SelectionState* SelectionStateChanger::mpState

private

Definition at line 66 of file SelectionState.h.

Referenced by Commit(), and ~SelectionStateChanger().

mTracks

TrackList& SelectionStateChanger::mTracks

private

Definition at line 67 of file SelectionState.h.

Referenced by ~SelectionStateChanger().

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The documentation for this class was generated from the following files:

• SelectionState.h
• SelectionState.cpp