#include <LabelGlyphHandle.h>

Collaboration diagram for LabelTrackHit:

Public Member Functions
	LabelTrackHit (const std::shared_ptr< LabelTrack > &pLT)

	~LabelTrackHit ()

void	OnLabelPermuted (const LabelTrackEvent &e)

Public Attributes
int	mEdge {}

int	mMouseOverLabel { -1 }

int	mMouseOverLabelLeft { -1 }
	Keeps track of which (ranged) label the mouse is currently over. More...

int	mMouseOverLabelRight { -1 }
	Keeps track of which left label the mouse is currently over. More...

bool	mIsAdjustingLabel {}
	Keeps track of which right label the mouse is currently over. More...

std::shared_ptr< LabelTrack >	mpLT {}

Observer::Subscription	mSubscription

Detailed Description

mEdge: 0 if not over a glyph, else a bitwise or of : 1 if over the left-hand glyph, 2 if over the right-hand glyph on a label, 4 if over center.

mMouseLabelLeft - index of any left label hit mMouseLabelRight - index of any right label hit

Definition at line 33 of file LabelGlyphHandle.h.

Constructor & Destructor Documentation

◆ LabelTrackHit()

LabelTrackHit::LabelTrackHit ( const std::shared_ptr< LabelTrack > & pLT )

Definition at line 32 of file LabelGlyphHandle.cpp.

   : mpLT{ pLT }
{
   mSubscription = pLT->Subscribe( *this, &LabelTrackHit::OnLabelPermuted );
}

References mSubscription, and OnLabelPermuted().

Here is the call graph for this function:

◆ ~LabelTrackHit()

LabelTrackHit::~LabelTrackHit ( )

Definition at line 38 of file LabelGlyphHandle.cpp.

39{

40}

Member Function Documentation

◆ OnLabelPermuted()

void LabelTrackHit::OnLabelPermuted ( const LabelTrackEvent & e )

Definition at line 42 of file LabelGlyphHandle.cpp.

{
   if ( e.mpTrack.lock() != mpLT )
      return;
   if ( e.type != LabelTrackEvent::Permutation )
      return;
 
   auto former = e.mFormerPosition;
   auto present = e.mPresentPosition;
 
   auto update = [=]( int &index ){
      if ( index == former )
         index = present;
      else if ( former < index && index <= present )
         -- index;
      else if ( former > index && index >= present )
         ++ index;
   };
 
   update( mMouseOverLabelLeft );
   update( mMouseOverLabelRight );
   update( mMouseOverLabel );
}