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Diffstat (limited to 'intern/ghost/test/multitest/ScrollBar.c')
| -rw-r--r-- | intern/ghost/test/multitest/ScrollBar.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/intern/ghost/test/multitest/ScrollBar.c b/intern/ghost/test/multitest/ScrollBar.c new file mode 100644 index 00000000000..cd690f6f14e --- /dev/null +++ b/intern/ghost/test/multitest/ScrollBar.c @@ -0,0 +1,145 @@ +/** + * $Id$ + * ***** BEGIN GPL/BL DUAL LICENSE BLOCK ***** + * + * This program 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; either version 2 + * of the License, or (at your option) any later version. The Blender + * Foundation also sells licenses for use in proprietary software under + * the Blender License. See http://www.blender.org/BL/ for information + * about this. + * + * This program 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, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL/BL DUAL LICENSE BLOCK ***** + */ + +#include <stdlib.h> + +#include <math.h> + +#include "MEM_guardedalloc.h" + +#include "Basic.h" +#include "ScrollBar.h" + +struct _ScrollBar { + int rect[2][2]; + float thumbpos, thumbpct; + + int inset; + int minthumb; + + int scrolling; + float scrolloffs; +}; + +static int scrollbar_get_thumbH(ScrollBar *sb) { + int scrollable_h= rect_height(sb->rect) - 2*sb->inset; + + return clamp_i(sb->thumbpct*scrollable_h, sb->minthumb, scrollable_h); +} +static int scrollbar_get_thumbableH(ScrollBar *sb) { + int scrollable_h= rect_height(sb->rect) - 2*sb->inset; + int thumb_h= scrollbar_get_thumbH(sb); + + return scrollable_h - thumb_h; +} + +static float scrollbar_co_to_pos(ScrollBar *sb, int yco) { + int thumb_h= scrollbar_get_thumbH(sb); + int thumbable_h= scrollbar_get_thumbableH(sb); + int thumbable_y= (sb->rect[0][1]+sb->inset) + thumb_h/2; + + return (float) (yco-thumbable_y)/thumbable_h; +} + +/**/ + +ScrollBar *scrollbar_new(int inset, int minthumb) { + ScrollBar *sb= MEM_callocN(sizeof(*sb), "scrollbar_new"); + sb->inset= inset; + sb->minthumb= minthumb; + + return sb; +} + +void scrollbar_get_thumb(ScrollBar *sb, int thumb_r[2][2]) { + int thumb_h= scrollbar_get_thumbH(sb); + int thumbable_h= scrollbar_get_thumbableH(sb); + + thumb_r[0][0]= sb->rect[0][0]+sb->inset; + thumb_r[1][0]= sb->rect[1][0]-sb->inset; + + thumb_r[0][1]= sb->rect[0][1]+sb->inset + sb->thumbpos*thumbable_h; + thumb_r[1][1]= thumb_r[0][1] + thumb_h; +} + +int scrollbar_is_scrolling(ScrollBar *sb) { + return sb->scrolling; +} +int scrollbar_contains_pt(ScrollBar *sb, int pt[2]) { + return rect_contains_pt(sb->rect, pt); +} + +void scrollbar_start_scrolling(ScrollBar *sb, int yco) { + int thumb_h_2= scrollbar_get_thumbH(sb)/2; + int thumbable_h= scrollbar_get_thumbableH(sb); + float npos= scrollbar_co_to_pos(sb, yco); + + sb->scrolloffs= sb->thumbpos - npos; + if (fabs(sb->scrolloffs) >= (float) thumb_h_2/thumbable_h) { + sb->scrolloffs= 0.0; + } + + sb->scrolling= 1; + sb->thumbpos= clamp_f(npos + sb->scrolloffs, 0.0, 1.0); +} +void scrollbar_keep_scrolling(ScrollBar *sb, int yco) { + float npos= scrollbar_co_to_pos(sb, yco); + + sb->thumbpos= clamp_f(npos + sb->scrolloffs, 0.0, 1.0); +} +void scrollbar_stop_scrolling(ScrollBar *sb) { + sb->scrolling= 0; + sb->scrolloffs= 0.0; +} + +void scrollbar_set_thumbpct(ScrollBar *sb, float pct) { + sb->thumbpct= pct; +} +void scrollbar_set_thumbpos(ScrollBar *sb, float pos) { + sb->thumbpos= clamp_f(pos, 0.0, 1.0); +} +void scrollbar_set_rect(ScrollBar *sb, int rect[2][2]) { + rect_copy(sb->rect, rect); +} + +float scrollbar_get_thumbpct(ScrollBar *sb) { + return sb->thumbpct; +} +float scrollbar_get_thumbpos(ScrollBar *sb) { + return sb->thumbpos; +} +void scrollbar_get_rect(ScrollBar *sb, int rect_r[2][2]) { + rect_copy(rect_r, sb->rect); +} + +void scrollbar_free(ScrollBar *sb) { + MEM_freeN(sb); +} |