132 lines
3.3 KiB
C
Executable File
132 lines
3.3 KiB
C
Executable File
/*
|
||
* Copyright 2010 Ole Loots <ole@monochrom.net>
|
||
*
|
||
* This file is part of NetSurf, http://www.netsurf-browser.org/
|
||
*
|
||
* NetSurf is free software; you can redistribute it and/or modify
|
||
* it under the terms of the GNU General Public License as published by
|
||
* the Free Software Foundation; version 2 of the License.
|
||
*
|
||
* NetSurf is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License
|
||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
#include "atari/slider.h"
|
||
|
||
long inline slider_pages( long content_dim, long workarea_dim )
|
||
{
|
||
long ret;
|
||
ret = (long)ceil( (float)content_dim / (float)workarea_dim );
|
||
if( ret <= 0 )
|
||
ret = 1;
|
||
return( ret );
|
||
}
|
||
|
||
float inline slider_pages_dec( long content_dim, long workarea_dim )
|
||
{
|
||
float ret;
|
||
ret = (float)content_dim / (float)workarea_dim );
|
||
if( ret <= 0 )
|
||
ret = 1;
|
||
return( ret );
|
||
}
|
||
|
||
|
||
int slider_gem_size( long content_dim, long workarea_dim )
|
||
{
|
||
int ret;
|
||
int pages = slider_pages(content_dim, workarea_dim);
|
||
if( pages <= 0 )
|
||
return 1;
|
||
ret = 1000 / pages;
|
||
if( ret <= 0 )
|
||
ret = 1;
|
||
return( ret );
|
||
}
|
||
|
||
|
||
int slider_pos_to_gem_pos( long content_dim, long workarea_dim, long slider_pos )
|
||
{
|
||
int ret;
|
||
int spos = slider_max_pos( content_dim, workarea_dim );
|
||
if( spos < 1 )
|
||
return( 0 );
|
||
float x = (float)1000 / spos;
|
||
if(content_dim >= 1000)
|
||
ret = (int)( x * slider_pos );
|
||
else
|
||
ret = (int)ceilf( (float)x * slider_pos );
|
||
return( max(0, ret) );
|
||
}
|
||
|
||
|
||
long slider_gem_pos_to_pos( long content_dim, long workarea_dim, int slider_pos )
|
||
{
|
||
long ret;
|
||
int nmax = slider_max_pos( content_dim, workarea_dim );
|
||
float x = (float)1000 / nmax;
|
||
if(content_dim >= 1000)
|
||
ret = (int) ( (float) slider_pos * x);
|
||
else
|
||
ret = (int) ceilf( (float)slider_pos * x );
|
||
return( max(0, ret) );
|
||
}
|
||
|
||
|
||
long inline slider_gem_size_to_res( long workarea_dim, int gem_size )
|
||
{
|
||
/* subtract [<-] and [->] buttons (16*2) from workarea: */
|
||
int factor = 1000 / (workarea_dim - 16*2);
|
||
return( max(1, gem_size / factor) );
|
||
}
|
||
|
||
|
||
long slider_gem_pos_to_res( long content_dim, long workarea_dim, int gem_pos )
|
||
{
|
||
/* subtract size of boxchar: */
|
||
int room = workarea_dim - 16 * 2 - slider_gem_size_to_res(workarea_dim, slider_gem_sz );
|
||
|
||
/*
|
||
1. Berechnen welchem Prozentsatz die GEM Position entspricht:
|
||
1000 = Grundwert
|
||
gem_pos = Prozentwert
|
||
Prozentsatz = ?
|
||
Rechnung: Prozentwert * 100 / 1000
|
||
Gek<65>rzt: Prozentwert / 10
|
||
p_calc = der Prozentsatz / 100 -> fuer vereinfachte nutzung
|
||
*/
|
||
/* float p_gem = (float)gem_pos / 10; */
|
||
float p_calc = (float)gem_pos / 1000;
|
||
|
||
/*
|
||
2. Berechnen welchem Pixel der Prozentsatz entspricht
|
||
room = Grundwert
|
||
p_gem = Prozentsatz
|
||
Prozentwert = ?
|
||
Rechnung = G * p / 100
|
||
Anmerkung: es wird p_calc verwendet, da praktischer...
|
||
*/
|
||
int pixel = (float)((float)room * p_calc)+0.5;
|
||
|
||
return( pixel );
|
||
}
|
||
|
||
|
||
/*
|
||
|
||
Not implemented
|
||
|
||
long slider_pos_to_res( long content_dim, long workarea_dim, int pos )
|
||
{
|
||
long max_pos = slider_max_pos( content_dim, workarea_dim );
|
||
return( -1 );
|
||
}
|
||
*/
|
||
|
||
|