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g15daemon/plugins/g15_plugin_clock.c
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/*
This file is part of g15daemon.
g15daemon 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.
g15daemon 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 g15daemon; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
(c) 2006 Mike Lampard, Philip Lawatsch, and others
$Revision: 290 $ - $Date: 2007-09-08 08:50:33 +0200 (Sat, 08 Sep 2007) $ $Author: mlampard $
simple Clock plugin, replace the various functions with your own, and change the g15plugin_info struct below to suit,
edit Makefile.am and compile. Add salt and pepper to taste. For a more advanced plugin that creates it's own lcd screens on-the-fly,
see the tcpserver plugin in this directory.
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <math.h>
#include <time.h>
#include <libg15.h>
#include <config.h>
#include <g15daemon.h>
#include <libg15render.h>
extern double round(double);
// clock specs:
#define CLOCK_CENTERX 25
#define CLOCK_CENTERY 21
#define CLOCK_RADIUS 20
// useful shortcuts (g15r_drawCircle() is a bit egg-shaped, or my math is :)
#define CLOCK_STARTX (CLOCK_CENTERX-CLOCK_RADIUS-1)
#define CLOCK_STARTY (CLOCK_CENTERY-CLOCK_RADIUS)
#define CLOCK_ENDX (CLOCK_CENTERX+CLOCK_RADIUS+1)
#define CLOCK_ENDY (CLOCK_CENTERY+CLOCK_RADIUS)
static int mode=1;
static int showdate=0;
static int digital=1;
g15canvas *static_canvas = NULL;
//----------------------------------------------------------------------------
// calc x,y for given minute/hour/sec (pos), cut_off is for radius variations
// ( ie. shorter/longer clock-hands, line parts....)
void get_clock_pos(int pos, int *x, int *y, int cut_off)
{
// pos = [0-60]
// make sure it's in range:
pos %= 60;
// angles go contra-clockwise, but clock goes clockwise :), so invert clock orientation
pos = 60 - pos;
// this math is patent-copy-trademark-protected by <Rasta Freak> :)
double ang = 270.0 - 6.0*(double)pos;
ang = (ang * 2.0 * M_PI) / 360.0;
// simple pre-school math for naturaly dumb:
double _x = (double)CLOCK_CENTERX + (cos(ang)*(double)(CLOCK_RADIUS+1-cut_off));
double _y = (double)CLOCK_CENTERY + (sin(ang)*(double)(CLOCK_RADIUS-cut_off));
*x = (int)(round(_x));
*y = (int)(round(_y));
}
//----------------------------------------------------------------------------
// draw clock frame (only once, as it is stored in static_canvas)
// NOTE - coords here are hardcoded !
void draw_static_canvas(void)
{
g15canvas *c = static_canvas;
int i;
g15r_clearScreen (c, G15_COLOR_WHITE);
g15r_drawCircle(c, CLOCK_CENTERX, CLOCK_CENTERY, CLOCK_RADIUS, 0, G15_COLOR_BLACK);
g15r_drawCircle(c, CLOCK_CENTERX, CLOCK_CENTERY, 2, 1, G15_COLOR_BLACK);
for (i=0; i<60; i+=5)
{
if ((i%15)==0)
{
// draw number (12/3/6/9):
switch (i)
{
case 0:
g15r_renderString(c, (unsigned char*)"12", 0, G15_TEXT_SMALL, 22, 3);
break;
case 15:
g15r_renderString(c, (unsigned char*)"3", 3, G15_TEXT_SMALL, 42, 1);
break;
case 30:
g15r_renderString(c, (unsigned char*)"6", 6, G15_TEXT_SMALL, 24, -1);
break;
case 45:
g15r_renderString(c, (unsigned char*)"9", 3, G15_TEXT_SMALL, 6, 1);
break;
}
}
else
{
// draw 4-pixel square dot for other hours:
int x1,y1,dir;
if (i>15 && i<45) dir=-1; else dir=1;
get_clock_pos(i, &x1, &y1, 3);
g15r_setPixel(c, x1, y1, G15_COLOR_BLACK);
g15r_setPixel(c, x1+dir, y1, G15_COLOR_BLACK);
g15r_setPixel(c, x1, y1+dir, G15_COLOR_BLACK);
g15r_setPixel(c, x1+dir, y1+dir, G15_COLOR_BLACK);
}
}
}
static int draw_digital(g15canvas *canvas)
{
unsigned int col = 0;
unsigned int len=0;
int narrows=0;
int totalwidth=0;
char buf[10];
char ampm[3];
int height = G15_LCD_HEIGHT - 1;
time_t currtime = time(NULL);
memset(buf,0,10);
memset(ampm,0,3);
if(showdate) {
char buf2[40];
strftime(buf2,40,"%A %e %B %Y",localtime(&currtime));
g15r_renderString (canvas,(unsigned char *)buf2 , 0, G15_TEXT_MED, 80-((strlen(buf2)*5)/2), height-6);
height-=10;
}
if(mode) {
strftime(buf,6,"%H:%M",localtime(&currtime));
} else {
strftime(buf,6,"%l:%M",localtime(&currtime));
strftime(ampm,3,"%p",localtime(&currtime));
}
if(buf[0]==49)
narrows=1;
len = strlen(buf);
if(buf[0]==' ')
len++;
if(narrows)
totalwidth=(len*20)+(15);
else
totalwidth=len*20;
for (col=0;col<len;col++)
{
int num = -1;
if ((buf[col] > 47) && (buf[col] < 59))
num = buf[col] - 48;
else if (buf[col] == 45)
num = 11;
else if (buf[col] == 46)
num = 12;
if (num >= 0)
g15r_drawBigNum (canvas, (80-(totalwidth)/2)+col*20, 1,(80-(totalwidth)/2)+(col+1)*20, height, G15_COLOR_BLACK, num);
}
if(ampm[0]!=0)
g15r_renderString (canvas,(unsigned char *)ampm,0,G15_TEXT_LARGE,totalwidth+15,height-6);
return G15_PLUGIN_OK;
}
static int draw_analog(g15canvas *c)
{
int xh, yh;
int xm, ym;
int xs, ys;
time_t now = time(NULL);
struct tm *t = localtime(&now);
int h;
h = t->tm_hour;
h %= 12;
h *= 5;
h += t->tm_min * 5 / 60;
get_clock_pos(h, &xh, &yh, 9);
get_clock_pos(t->tm_min, &xm, &ym, 6);
get_clock_pos(t->tm_sec, &xs, &ys, 3);
// put background:
memcpy(c, static_canvas, sizeof(g15canvas));
// hour
g15r_drawLine(c, CLOCK_CENTERX-2, CLOCK_CENTERY, xh, yh, G15_COLOR_BLACK);
g15r_drawLine(c, CLOCK_CENTERX-1, CLOCK_CENTERY, xh, yh, G15_COLOR_BLACK);
g15r_drawLine(c, CLOCK_CENTERX, CLOCK_CENTERY, xh, yh+1, G15_COLOR_BLACK);
g15r_drawLine(c, CLOCK_CENTERX+1, CLOCK_CENTERY, xh, yh, G15_COLOR_BLACK);
g15r_drawLine(c, CLOCK_CENTERX+2, CLOCK_CENTERY, xh, yh, G15_COLOR_BLACK);
// minute
g15r_drawLine(c, CLOCK_CENTERX-1, CLOCK_CENTERY, xm, ym, G15_COLOR_BLACK);
g15r_drawLine(c, CLOCK_CENTERX, CLOCK_CENTERY, xm, ym+1, G15_COLOR_BLACK);
g15r_drawLine(c, CLOCK_CENTERX+1, CLOCK_CENTERY, xm, ym, G15_COLOR_BLACK);
// second:
g15r_drawLine(c, CLOCK_CENTERX, CLOCK_CENTERY, xs, ys, G15_COLOR_BLACK);
//
// draw texts:
//
char day[32]; // Tuesday
char mon[32]; // March
char year[32]; // 1234 AD
char time[32]; // 22:33:44
char date[32]; // 21.April
strftime(day, sizeof(day), "%A", t);
strftime(mon, sizeof(mon), "%B", t);
sprintf(date, "%d.%s", t->tm_mday, mon);
sprintf(year, "%4d AD", t->tm_year+1900);
if(mode)
strftime(time,sizeof(time),"%H:%M:%S",t);
else
strftime(time,sizeof(time),"%r",t);
if(showdate) {
g15r_renderString(c, (unsigned char*)time, 0, G15_TEXT_LARGE, 60, 4);
g15r_renderString(c, (unsigned char*)day, 1, G15_TEXT_LARGE, 60, 5);
g15r_renderString(c, (unsigned char*)date, 2, G15_TEXT_LARGE, 60, 6);
g15r_renderString(c, (unsigned char*)year, 3, G15_TEXT_LARGE, 60, 7);
} else
g15r_renderString(c, (unsigned char*)time, 0, G15_TEXT_LARGE, 60, 18);
return G15_PLUGIN_OK;
}
static int lcdclock(lcd_t *lcd)
{
int ret = 0;
g15canvas *canvas = (g15canvas *) malloc (sizeof (g15canvas));
if (canvas == NULL) {
g15daemon_log(LOG_ERR, "Unable to allocate canvas");
return G15_PLUGIN_QUIT;
}
memset(canvas->buffer, 0, G15_BUFFER_LEN);
canvas->mode_cache = 0;
canvas->mode_reverse = 0;
canvas->mode_xor = 0;
memset(lcd->buf,0,G15_BUFFER_LEN);
if(digital)
ret = draw_digital(canvas);
else
ret = draw_analog(canvas);
memcpy (lcd->buf, canvas->buffer, G15_BUFFER_LEN);
lcd->ident = random();
free(canvas);
return G15_PLUGIN_OK;
}
static int myeventhandler(plugin_event_t *myevent) {
lcd_t *lcd = (lcd_t*) myevent->lcd;
config_section_t *clockcfg =NULL;
switch (myevent->event)
{
case G15_EVENT_KEYPRESS:
clockcfg = g15daemon_cfg_load_section(lcd->masterlist,"Clock");
if(myevent->value & G15_KEY_L2){
mode = 1^mode;
g15daemon_cfg_write_bool(clockcfg, "24hrFormat", mode);
}
if(myevent->value & G15_KEY_L3) {
showdate = 1^showdate;
g15daemon_cfg_write_bool(clockcfg, "ShowDate", showdate);
}
if(myevent->value & G15_KEY_L4) {
digital = 1^digital;
g15daemon_cfg_write_bool(clockcfg, "Digital", digital);
}
// printf("Clock plugin received keypress event : %i\n",myevent->value);
break;
case G15_EVENT_VISIBILITY_CHANGED:
// printf("Clock received new visibility status (%i)\n",myevent->value);
break;
default:
break;
}
return G15_PLUGIN_OK;
}
/* completely uncessary function called when plugin is exiting */
static void callmewhenimdone(lcd_t *lcd){
if(static_canvas != NULL) free(static_canvas);
return;
}
/* completely unnecessary initialisation function which could just as easily have been set to NULL in the g15plugin_info struct */
static int myinithandler(lcd_t *lcd){
config_section_t *clockcfg = g15daemon_cfg_load_section(lcd->masterlist,"Clock");
mode=g15daemon_cfg_read_bool(clockcfg, "24hrFormat",1);
showdate=g15daemon_cfg_read_bool(clockcfg, "ShowDate",0);
digital=g15daemon_cfg_read_bool(clockcfg, "Digital",1);
static_canvas = (g15canvas*)malloc(sizeof(g15canvas));
if (static_canvas != NULL)
{
memset(static_canvas->buffer, 0, G15_BUFFER_LEN);
static_canvas->mode_cache = 0;
static_canvas->mode_reverse = 0;
static_canvas->mode_xor = 0;
draw_static_canvas();
}
return static_canvas == NULL ? G15_PLUGIN_QUIT : G15_PLUGIN_OK;
}
/* if no exitfunc or eventhandler, member should be NULL */
plugin_info_t g15plugin_info[] = {
/* TYPE, name, initfunc, updatefreq, exitfunc, eventhandler, initfunc */
{G15_PLUGIN_LCD_CLIENT, "Clock", (void*)lcdclock, 500, (void*)callmewhenimdone, (void*)myeventhandler, (void*)myinithandler},
{G15_PLUGIN_NONE, "" , NULL, 0, NULL, NULL, NULL}
};
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