Inheritance diagram for anonymous_namespace{TrackView.cpp}::TrackPositioner:

Collaboration diagram for anonymous_namespace{TrackView.cpp}::TrackPositioner:

Public Member Functions
	TrackPositioner (AudacityProject &project)

	TrackPositioner (const TrackPositioner &) PROHIBITED

TrackPositioner &	operator= (const TrackPositioner &) PROHIBITED

void	OnUpdate (const TrackListEvent &e)

Public Member Functions inherited from ClientData::Base
virtual	~Base ()

Public Attributes
AudacityProject &	mProject

Observer::Subscription	mSubscription

Detailed Description

Attached to each project, it receives track list events and maintains the cache of cumulative track view heights for use by TrackPanel.

Definition at line 194 of file TrackView.cpp.

Constructor & Destructor Documentation

◆ TrackPositioner() [1/2]

anonymous_namespace{TrackView.cpp}::TrackPositioner::TrackPositioner ( AudacityProject & project )

inlineexplicit

Definition at line 198 of file TrackView.cpp.

      : mProject{ project }
   {
      mSubscription = TrackList::Get( project )
         .Subscribe(*this, &TrackPositioner::OnUpdate);
   }

References TrackList::Get(), and Observer::Publisher< Message, NotifyAll >::Subscribe().

Here is the call graph for this function:

◆ TrackPositioner() [2/2]

anonymous_namespace{TrackView.cpp}::TrackPositioner::TrackPositioner ( const TrackPositioner & )

Member Function Documentation

◆ OnUpdate()

void anonymous_namespace{TrackView.cpp}::TrackPositioner::OnUpdate ( const TrackListEvent & e )

inline

Definition at line 207 of file TrackView.cpp.

   {
      switch (e.mType) {
      case TrackListEvent::ADDITION:
      case TrackListEvent::DELETION:
      case TrackListEvent::PERMUTED:
      case TrackListEvent::RESIZING:
         break;
      default:
         return;
      }
      auto iter =
         TrackList::Get( mProject ).Find( e.mpTrack.lock().get() );
      if ( !*iter )
         return;
 
      auto prev = iter;
      auto yy = TrackView::GetCumulativeHeight( *--prev );
 
      while( auto pTrack = *iter ) {
         auto &view = TrackView::Get( *pTrack );
         view.SetCumulativeHeightBefore( yy );
         yy += view.GetHeight();
         ++iter;
      }
   }

References TrackListEvent::ADDITION, TrackListEvent::DELETION, TrackList::Find(), TrackList::Get(), TrackView::Get(), TrackView::GetCumulativeHeight(), TrackListEvent::mpTrack, TrackListEvent::mType, TrackListEvent::PERMUTED, and TrackListEvent::RESIZING.

Here is the call graph for this function:

◆ operator=()

TrackPositioner & anonymous_namespace{TrackView.cpp}::TrackPositioner::operator= ( const TrackPositioner & )

Member Data Documentation

◆ mProject

AudacityProject& anonymous_namespace{TrackView.cpp}::TrackPositioner::mProject

Definition at line 196 of file TrackView.cpp.

◆ mSubscription

Observer::Subscription anonymous_namespace{TrackView.cpp}::TrackPositioner::mSubscription

Definition at line 234 of file TrackView.cpp.

The documentation for this struct was generated from the following file:

TrackView.cpp

Public Member Functions

Public Attributes