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Clean up snap behavior.

This commit is contained in:
Jonathan Moore Liles 2008-05-12 23:38:05 -05:00
parent 71c4964174
commit 50897c6cd7
1 changed files with 50 additions and 32 deletions
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72
Timeline/Timeline.C
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@ -250,41 +250,57 @@ Timeline::time ( nframes_t when, int bpb, int note_type )
time_track->add( new Time_Point( when, bpb, note_type ) );
}
#if 0
struct BBT
{
int bar, beat, tick;
/* struct BBT */
/* { */
/* int bar, beat, tick; */
BBT ( int bar, int beat, int tick ) : bar( bar ), beat( beat ), tick( tick )
/* BBT ( int bar, int beat, int tick ) : bar( bar ), beat( beat ), tick( tick ) */
/* { */
/* } */
/* }; */
/* /\** returns the BBT value for timestamp /when/ by examining the tempo/time maps *\/ */
/* BBT */
/* Timeline::bbt ( nframes_t when ) */
/* { */
/* Tempo_Sequence *tempo = (Tempo_Sequence*)rulers->child( 0 ); */
/* BBT bbt; */
/* for ( list <Sequence_Widget *>::const_iterator i = tempo.widgets.begin(); */
/* i != tempo.widgets.end(); ++i ) */
/* { */
/* Tempo_Point *p = *i; */
/* } */
/* } */
struct nearest_line_arg
{
}
nframes_t original;
nframes_t closest;
};
/** returns the BBT value for timestamp /when/ by examining the tempo/time maps */
BBT
Timeline::bbt ( nframes_t when )
const int snap_pixel = 10;
static nframes_t
abs_diff ( nframes_t n1, nframes_t n2 )
{
Tempo_Sequence *tempo = (Tempo_Sequence*)rulers->child( 0 );
BBT bbt;
for ( list <Sequence_Widget *>::const_iterator i = tempo.widgets.begin();
i != tempo.widgets.end(); ++i )
{
Tempo_Point *p = *i;
return n1 > n2 ? n1 - n2 : n2 - n1;
}
};
#endif
void
nearest_line_cb ( nframes_t frame, int X, int Y, int H, void *arg )
{
*((nframes_t*)arg) = frame;
nearest_line_arg *n = (nearest_line_arg *)arg;
if ( Timeline::snap_magnetic &&
abs_diff( frame, n->original ) > timeline->x_to_ts( snap_pixel ) )
return;
if ( abs_diff( frame, n->original ) < abs_diff( n->original, n->closest ) )
n->closest = frame;
}
/** return the absolute pixel of the nearest measure line to /x/ */
@ -294,10 +310,12 @@ Timeline::nearest_line ( nframes_t when, nframes_t *frame ) const
if ( snap_to == None )
return false;
*frame = -1;
nearest_line_arg n = { when, -1 };
/* FIXME: handle snap to bar */
draw_measure( when - x_to_ts( 10 ), 0, 20, 0, (Fl_Color)0, nearest_line_cb, frame, false );
draw_measure( when - x_to_ts( 10 ), 0, 20, 0, (Fl_Color)0, nearest_line_cb, &n, false );
*frame = n.closest;
return *frame != (nframes_t)-1;
}