8517ed8939
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7901 a1c6a512-1295-4272-9138-f99709370657
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) Markus Braun (2002)
|
|
*
|
|
* All files in this archive are subject to the GNU General Public License.
|
|
* See the file COPYING in the source tree root for full license agreement.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include "scrollbar.h"
|
|
#ifdef HAVE_LCD_BITMAP
|
|
#include "config.h"
|
|
#include "limits.h"
|
|
|
|
void gui_scrollbar_draw(struct screen * screen, int x, int y,
|
|
int width, int height, int items,
|
|
int min_shown, int max_shown,
|
|
enum orientation orientation)
|
|
{
|
|
int min;
|
|
int max;
|
|
int inner_len;
|
|
int start;
|
|
int size;
|
|
|
|
/* draw box */
|
|
screen->drawrect(x, y, width, height);
|
|
|
|
screen->set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
|
|
|
|
/* clear edge pixels */
|
|
screen->drawpixel(x, y);
|
|
screen->drawpixel((x + width - 1), y);
|
|
screen->drawpixel(x, (y + height - 1));
|
|
screen->drawpixel((x + width - 1), (y + height - 1));
|
|
|
|
/* clear pixels in progress bar */
|
|
screen->fillrect(x + 1, y + 1, width - 2, height - 2);
|
|
|
|
/* min should be min */
|
|
if(min_shown < max_shown) {
|
|
min = min_shown;
|
|
max = max_shown;
|
|
}
|
|
else {
|
|
min = max_shown;
|
|
max = min_shown;
|
|
}
|
|
|
|
/* limit min and max */
|
|
if(min < 0)
|
|
min = 0;
|
|
if(min > items)
|
|
min = items;
|
|
|
|
if(max < 0)
|
|
max = 0;
|
|
if(max > items)
|
|
max = items;
|
|
|
|
if (orientation == VERTICAL)
|
|
inner_len = height - 2;
|
|
else
|
|
inner_len = width - 2;
|
|
|
|
/* avoid overflows */
|
|
while (items > (INT_MAX / inner_len)) {
|
|
items >>= 1;
|
|
min >>= 1;
|
|
max >>= 1;
|
|
}
|
|
|
|
/* calc start and end of the knob */
|
|
if (items > 0 && items > (max - min)) {
|
|
size = inner_len * (max - min) / items;
|
|
if (size == 0) { /* width of knob is null */
|
|
size = 1;
|
|
start = (inner_len - 1) * min / items;
|
|
} else {
|
|
start = (inner_len - size) * min / (items - (max - min));
|
|
}
|
|
} else { /* if null draw full bar */
|
|
size = inner_len;
|
|
start = 0;
|
|
}
|
|
|
|
screen->set_drawmode(DRMODE_SOLID);
|
|
|
|
if(orientation == VERTICAL)
|
|
screen->fillrect(x + 1, y + start + 1, width - 2, size);
|
|
else
|
|
screen->fillrect(x + start + 1, y + 1, size, height - 2);
|
|
}
|
|
#endif /* HAVE_LCD_BITMAP */
|