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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: not checked in
*
* Copyright (C) 2002 Markus Braun
*
* 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 <lcd.h>
#include <limits.h>
#include "widgets.h"
#ifdef HAVE_LCD_BITMAP
/* Valid dimensions return true, invalid false */
static bool valid_dimensions(int x, int y, int width, int height)
{
if((x < 0) || (x + width > LCD_WIDTH) ||
(y < 0) || (y + height > LCD_HEIGHT))
{
return false;
}
return true;
}
/*
* Print a scroll bar
*/
void scrollbar(int x, int y, int width, int height, int items, int min_shown,
int max_shown, int orientation)
{
int min;
int max;
int inner_len;
int start;
int size;
/* check position and dimensions */
if (!valid_dimensions(x, y, width, height))
return;
/* draw box */
lcd_drawrect(x, y, width, height);
lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
/* clear edge pixels */
lcd_drawpixel(x, y);
lcd_drawpixel((x + width - 1), y);
lcd_drawpixel(x, (y + height - 1));
lcd_drawpixel((x + width - 1), (y + height - 1));
/* clear pixels in progress bar */
lcd_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;
start = (inner_len - size) * min / (items - (max - min));
}
else { /* if null draw a full bar */
size = inner_len;
start = 0;
}
/* width of knob is null */
if(size == 0) {
start = (inner_len - 1) * min / items;
size = 1;
}
lcd_set_drawmode(DRMODE_SOLID);
if(orientation == VERTICAL)
lcd_fillrect(x + 1, y + start + 1, width - 2, size);
else
lcd_fillrect(x + start + 1, y + 1, size, height - 2);
}
/*
* Print a checkbox
*/
void checkbox(int x, int y, int width, int height, bool checked)
{
/* check position and dimensions */
if((x < 0) || (x + width > LCD_WIDTH) ||
(y < 0) || (y + height > LCD_HEIGHT) ||
(width < 4 ) || (height < 4 ))
{
return;
}
lcd_drawrect(x, y, width, height);
if (checked){
lcd_drawline(x + 2, y + 2, x + width - 2 - 1 , y + height - 2 - 1);
lcd_drawline(x + 2, y + height - 2 - 1, x + width - 2 - 1, y + 2);
} else {
/* be sure to clear box */
lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
lcd_fillrect(x + 1, y + 1, width - 2, height - 2);
lcd_set_drawmode(DRMODE_SOLID);
}
}
#endif
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