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Break out some duplicated code into a seperate function

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15802 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2007-11-25 14:07:40 +00:00
parent 475e64eb5c
commit 54ecc698a5
1 changed files with 40 additions and 72 deletions
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112
apps/gui/scrollbar.c
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@ -23,17 +23,11 @@
#include "limits.h"
#include "bmp.h"
void gui_scrollbar_draw(struct screen * screen, int x, int y,
int width, int height, int items,
int min_shown, int max_shown,
unsigned flags)
/* calculates the start and size of the knob */
static void scrollbar_helper(int min_shown, int max_shown, int items,
int inner_len, int *size, int *start)
{
int inner_x, inner_y, inner_wd, inner_ht, inner_len;
int min, max, range;
int start, size;
#ifdef HAVE_LCD_COLOR
int infill;
#endif
/* min should be min */
if(min_shown < max_shown) {
@ -58,6 +52,40 @@ void gui_scrollbar_draw(struct screen * screen, int x, int y,
range = max - min;
/* avoid overflows */
while (items > (INT_MAX / inner_len)) {
items >>= 1;
range >>= 1;
}
/* calc start and end of the knob */
if (items > 0 && items > range) {
*size = inner_len * range / items;
if (*size == 0) { /* width of knob is null */
*size = 1;
*start = (inner_len - 1) * min / items;
} else {
*start = (inner_len - *size) * min / (items - range);
}
} else { /* if null draw full bar */
*size = inner_len;
*start = 0;
}
return;
}
void gui_scrollbar_draw(struct screen * screen, int x, int y,
int width, int height, int items,
int min_shown, int max_shown,
unsigned flags)
{
int inner_x, inner_y, inner_wd, inner_ht, inner_len;
int start, size;
#ifdef HAVE_LCD_COLOR
int infill;
#endif
inner_x = x + 1;
inner_y = y + 1;
inner_wd = width - 2;
@ -68,25 +96,7 @@ void gui_scrollbar_draw(struct screen * screen, int x, int y,
else
inner_len = inner_ht;
/* avoid overflows */
while (items > (INT_MAX / inner_len)) {
items >>= 1;
range >>= 1;
}
/* calc start and end of the knob */
if (items > 0 && items > range) {
size = inner_len * range / items;
if (size == 0) { /* width of knob is null */
size = 1;
start = (inner_len - 1) * min / items;
} else {
start = (inner_len - size) * min / (items - range);
}
} else { /* if null draw full bar */
size = inner_len;
start = 0;
}
scrollbar_helper(min_shown, max_shown, items, inner_len, &size, &start);
/* draw box */
#ifdef HAVE_LCD_COLOR
@ -157,63 +167,21 @@ void gui_bitmap_scrollbar_draw(struct screen * screen, struct bitmap bm, int x,
int min_shown, int max_shown,
unsigned flags)
{
int min;
int max;
int inner_len;
int start;
int size;
int inner_len;
screen->set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
/* clear pixels in progress bar */
screen->fillrect(x, y, width, height);
/* 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 (flags & HORIZONTAL)
inner_len = width;
else
inner_len = height;
/* 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;
}
scrollbar_helper(min_shown, max_shown, items, inner_len, &size, &start);
screen->set_drawmode(DRMODE_SOLID);