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/* GPS speedometer as a wrapper around an Athena widget Tachometer
* - Derrick J Brashear <shadow@dementia.org>
* Tachometer widget from Kerberometer (xklife)
*/
#include "config.h"
#include <unistd.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdarg.h>
#include <getopt.h>
#include <stdio.h>
#include <math.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>
#include <X11/Xaw/Box.h>
#include <X11/Xaw/Label.h>
#include <X11/Xaw/Command.h>
#include <X11/Xaw/Paned.h>
#include <Tachometer.h>
#include "xgpsspeed.icon"
#include "gps.h"
#if defined(ultrix) || defined(SOLARIS)
extern double rint();
#endif
struct gps_data_t *gpsdata;
static Widget toplevel, base;
static Widget tacho, label;
static XrmOptionDescRec options[] = {
{"-rv", "*reverseVideo", XrmoptionNoArg, "TRUE"},
{"-nc", "*needleColor", XrmoptionSepArg, NULL},
{"-needlecolor","*needleColor", XrmoptionSepArg, NULL},
};
/*
* Definition of the Application resources structure.
*/
String fallback_resources[] =
{
NULL
};
static void update_display(char *buf)
{
int new = rint(gpsdata->speed * 6076.12 / 5280);
#if 0
fprintf(stderr, "gNMEAspeed %f scaled %f %d\n", gpsdata->speed, rint(gpsdata->speed * 5208/6706.12), (int)rint(gpsdata->speed * 5208/6706.12));
#endif
if (new > 100)
new = 100;
TachometerSetValue(tacho, new);
}
static void handle_input(XtPointer client_data, int *source, XtInputId * id)
{
gps_poll(gpsdata);
}
int main(int argc, char **argv)
{
Arg args[10];
XtAppContext app;
Cardinal i;
extern char *optarg;
int option;
char *device_name = "/dev/gps";
while ((option = getopt(argc, argv, "hp:")) != -1) {
switch (option) {
case 'p':
device_name = strdup(optarg);
break;
case 'h':
case '?':
default:
fputs("usage: gps [options] \n\
options include: \n\
-p string = set GPS device name \n\
-h = help message \n\
", stderr);
exit(1);
}
}
toplevel = XtVaAppInitialize(&app, "xpsspeed.ad", options, XtNumber(options),
&argc, argv, fallback_resources, NULL);
#if 0
XtGetApplicationResources( toplevel, (caddr_t) &resources,
my_resources, XtNumber(my_resources),
NULL, (Cardinal) 0);
#endif
/**** Shell Widget ****/
i = 0;
XtSetArg(args[0], XtNiconPixmap,
XCreateBitmapFromData(XtDisplay(toplevel),
XtScreen(toplevel)->root, xgps_bits,
xgps_width, xgps_height)); i++;
XtSetValues(toplevel, args, i);
/**** Form widget ****/
base = XtCreateManagedWidget("pane", panedWidgetClass, toplevel, NULL, 0);
/**** Label widget (Title) ****/
i = 0;
XtSetArg(args[i], XtNlabel, "GPS Speedometer"); i++;
label = XtCreateManagedWidget("title", labelWidgetClass,
base, args, i);
/**** Label widget ****/
i = 0;
XtSetArg(args[i], XtNlabel, "Miles per Hour"); i++;
label = XtCreateManagedWidget("name", labelWidgetClass,
base, args, i);
/**** Tachometer widget ****/
tacho = XtCreateManagedWidget("meter",
tachometerWidgetClass,
base, NULL, 0);
XtRealizeWidget(toplevel);
/*
* Essentially all the interface to libgps happens below here
*/
gpsdata = gps_open(NULL, NULL);
if (!gpsdata)
{
fprintf(stderr, "xgpsspeed: no gpsd running.\n");
exit(2);
}
XtAppAddInput(app, gpsdata->gps_fd, (XtPointer) XtInputReadMask,
handle_input, NULL);
gps_set_raw_hook(gpsdata, update_display);
gps_query(gpsdata, "w+x\n");
XtAppMainLoop(app);
gps_close(gpsdata);
return 0;
}
void Usage()
{
fprintf(stderr,
"xgpsspeed <Toolkit Options> [-rv] [-nc needlecolor]\n");
exit(-1);
}
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