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Enforce power of two zoom levels.

This commit is contained in:
Jonathan Moore Liles 2008-04-27 10:45:49 -05:00
parent fb5f111167
commit 146126f2af
3 changed files with 22 additions and 24 deletions
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25
Timeline/Scalebar.H
View File

@ -27,12 +27,12 @@
class Scalebar : public Fl_Scrollbar
{
double _zoom;
int _zoom;
bool _zoom_changed;
double _zoom_min;
double _zoom_max;
int _zoom_min;
int _zoom_max;
void constrain ( void )
{
@ -60,9 +60,9 @@ public:
Scalebar ( int X, int Y, int W, int H ) : Fl_Scrollbar ( X, Y, W, H )
{
_zoom = 1.0f;
_zoom = 1;
_zoom_min = 0;
_zoom_max = 256;
_zoom_max = 4;
_zoom_changed = false;
step( 1 );
@ -70,12 +70,12 @@ public:
bool zoom_changed ( void ) const { return _zoom_changed; }
double zoom ( void ) const { return _zoom; }
void zoom ( double v ) { _zoom = v; }
void zoom ( int v ) { _zoom = v; }
// double value ( void ) const { return Fl_Slider::value(); }
void zoom_range ( double zmin, double zmax ) { _zoom_min = zmin; _zoom_max = zmax; }
void zoom_range ( int zmin, int zmax ) { _zoom_min = zmin; _zoom_max = zmax; }
void zoom_out ( void ) { int z = _zoom; _zoom *= 2; constrain(); maybe_do_callback( z ); }
void zoom_in ( void ) {int z = _zoom; _zoom /= 2; constrain(); maybe_do_callback( z ); }
void zoom_out ( void ) { int z = _zoom; ++_zoom; constrain(); maybe_do_callback( z ); }
void zoom_in ( void ) {int z = _zoom; --_zoom; constrain(); maybe_do_callback( z ); }
int
handle ( int m )
@ -91,12 +91,7 @@ public:
double z = _zoom;
if ( d < 0 )
while ( d++ )
_zoom /= 2;
else
while ( d-- )
_zoom *= 2;
_zoom += d;
constrain();

13
Timeline/Timeline.C
View File

@ -65,7 +65,7 @@ Timeline::cb_scroll ( Fl_Widget *w )
{
if ( hscroll->zoom_changed() )
{
_fpp = hscroll->zoom() * 1;
_fpp = hscroll->zoom();
// hscroll->range( 0, ts_to_x( _length ) - tracks->w() - Track::width() );
const int tw = tracks->w() - Track::width() - vscroll->w();
@ -94,8 +94,11 @@ Timeline::Timeline ( int X, int Y, int W, int H, const char* L ) : Fl_Overlay_Wi
o->range( 0, 48000 * 300 );
// o->zoom_range( 1, 16384 );
o->zoom_range( 1, 65536 << 4 );
o->zoom( 256 );
// o->zoom_range( 1, 65536 << 4 );
o->zoom_range( 1, 20 );
o->zoom( 8 );
o->type( FL_HORIZONTAL );
o->callback( cb_scroll, this );
@ -155,7 +158,7 @@ Timeline::Timeline ( int X, int Y, int W, int H, const char* L ) : Fl_Overlay_Wi
{
// sample_rate() = engine->sample_rate();
_fpp = 256;
_fpp = 8;
// _length = sample_rate() * 60 * 2;
/* FIXME: hack */
_length = -1;
@ -914,7 +917,7 @@ Timeline::zoom ( float secs )
const int sw = w() - vscroll->w() - Track::width();
/* FIXME: we actually need to set this in the scalebar */
_fpp = (int)((secs * sample_rate()) / sw);
// _fpp = (int)((secs * sample_rate()) / sw);
redraw();
}

8
Timeline/Timeline.H
View File

@ -98,7 +98,7 @@ class Timeline : public Fl_Overlay_Window, public RWLock
static void cb_scroll ( Fl_Widget *w, void *v );
void cb_scroll ( Fl_Widget *w );
float _fpp; /* frames per pixel */
int _fpp; /* frames per pixel, power of two */
nframes_t _length;
@ -127,11 +127,11 @@ public:
Timeline ( int X, int Y, int W, int H, const char *L=0 );
float fpp ( void ) const { return _fpp; }
nframes_t fpp ( void ) const { return 1 << _fpp; }
nframes_t length ( void ) const { return _length; }
nframes_t sample_rate ( void ) const { return engine->sample_rate(); }
int ts_to_x( nframes_t ts ) const { return ts / _fpp; }
nframes_t x_to_ts ( int x ) const { return x * _fpp; }
int ts_to_x( nframes_t ts ) const { return ts >> _fpp; }
nframes_t x_to_ts ( int x ) const { return x << _fpp; }
float beats_per_minute ( nframes_t when ) const;
int beats_per_bar ( nframes_t when ) const;