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Bidirectional scrolling implemented. The text will go back and forth

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when more than 4 characters are outside the LCD.
Small texts will wrap as normal.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3063 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Kjell Ericson 2003-01-10 13:22:07 +00:00
parent dc88e23700
commit 54c8c71d85
1 changed files with 45 additions and 27 deletions
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72
firmware/drivers/lcd-player.c
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@ -63,13 +63,13 @@ extern unsigned char extended_font_player[NO_EXTENDED_LCD_CHARS][8];
struct scrollinfo {
int mode;
char text[MAX_PATH];
char line[32];
int textlen;
int offset;
int turn_offset;
int startx;
int starty;
int space;
long scroll_start_tick;
int direction; /* +1 for right or -1 for left*/
};
static void scroll_thread(void);
@ -444,29 +444,33 @@ void lcd_init (void)
void lcd_puts_scroll(int x, int y, unsigned char* string )
{
struct scrollinfo* s;
int i;
DEBUGF("lcd_puts_scroll(%d, %d, %s)\n", x, y, string);
s = &scroll[y];
s->space = 11 - x;
lcd_puts(x,y,string);
s->textlen = strlen(string);
if ( s->textlen > s->space ) {
if ( s->textlen > 11-x ) {
s->mode = SCROLL_MODE_RUN;
s->scroll_start_tick = current_tick + scroll_delay;
s->offset=s->space;
s->offset=0;
s->startx=x;
s->starty=y;
s->direction=+1;
strncpy(s->text,string,sizeof s->text);
s->turn_offset=-1;
if ( s->textlen + x > 11+4)
s->turn_offset=s->textlen-x-11+4;
for (i=0; i<scroll_spacing && s->textlen<(int)sizeof(s->text); i++) {
s->text[s->textlen++]=' ';
}
if (s->textlen<(int)sizeof(s->text))
s->text[s->textlen]=' ';
s->text[sizeof s->text - 1] = 0;
memset(s->line, 0, sizeof s->line);
strncpy(s->line,string,
s->space > (int)sizeof s->line ?
(int)sizeof s->line : s->space );
s->line[sizeof s->line - 1] = 0;
} else
s->mode = SCROLL_MODE_OFF;
}
@ -564,7 +568,7 @@ static void scroll_thread(void)
{
struct scrollinfo* s;
int index;
int i;
int i, o;
bool update;
/* initialize scroll struct array */
@ -577,26 +581,40 @@ static void scroll_thread(void)
update = false;
for ( index = 0; index < SCROLLABLE_LINES; index++ ) {
s = &scroll[index];
if ( s->mode == SCROLL_MODE_RUN ) {
if ( TIME_AFTER(current_tick, s->scroll_start_tick) ) {
s = &scroll[index];
if ( s->mode == SCROLL_MODE_RUN ) {
if ( TIME_AFTER(current_tick, s->scroll_start_tick) ) {
char buffer[12];
update = true;
for ( i = 0; i < s->space - 1; i++ )
s->line[i] = s->line[i+1];
if ( s->offset < s->textlen ) {
s->line[(int)s->space - 1] = s->text[(int)s->offset];
s->offset++;
DEBUGF("offset=%d, turn_offset=%d, len=%d",
s->offset, s->turn_offset, s->textlen);
if ( s->offset < s->textlen-1 ) {
s->offset+=s->direction;
if (s->offset==0) {
s->direction=+1;
s->scroll_start_tick = current_tick + scroll_delay;
} else if (s->offset==s->turn_offset) {
s->direction=-1;
s->scroll_start_tick = current_tick + scroll_delay;
}
}
else {
s->line[s->space - 1] = ' ';
if ( s->offset < s->textlen + scroll_spacing - 1 )
s->offset++;
else
s->offset = 0;
}
lcd_puts(s->startx,s->starty,s->line);
i=0;
o=s->offset;
while (i<11) {
buffer[i++]=s->text[o++];
if (o==s->textlen)
break;
}
o=0;
while (i<11) {
buffer[i++]=s->text[o++];
}
buffer[11]=0;
lcd_puts(s->startx, s->starty, buffer);
}
}