Method OnSelExtendLeft

src/menus/SelectMenus.cpp:719–724

SeekInfo mSeekInfo;

void OnSelExtendLeft(const CommandContext &context)
{
   if( !OnlyHandleKeyUp( context ) )
      SeekLeftOrRight( context.project, DIRECTION_LEFT, SELECTION_EXTEND,
         mSeekInfo );
}

void OnSelExtendRight(const CommandContext &context)
{