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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 <unistd.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.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 "config.h"
#include "xgpsspeed.icon"
#include "gps.h"
#if defined(ultrix) || defined(SOLARIS)
extern double rint();
#endif
static struct gps_data_t *gpsdata;
static Widget toplevel, base, tacho, label;
static XrmOptionDescRec options[] = {
{"-rv", "*reverseVideo", XrmoptionNoArg, "TRUE"},
{"-nc", "*needleColor", XrmoptionSepArg, NULL},
{"-needlecolor","*needleColor", XrmoptionSepArg, NULL},
};
String fallback_resources[] = {
NULL
};
static void update_display(char *buf)
{
int new = rint(gpsdata->speed * KNOTS_TO_MPH);
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;
int option;
char *colon, *server = NULL;
char *port = DEFAULT_GPSD_PORT;
toplevel = XtVaAppInitialize(&app, "xpsspeed.ad",
options, XtNumber(options),
&argc, argv, fallback_resources, NULL);
while ((option = getopt(argc, argv, "h")) != -1) {
switch (option) {
case 'h':
case '?':
default:
fputs("usage: gps [-h] [-rv] [-nc] [-needlecolor] [server[:port]]\n", stderr);
exit(1);
}
}
if (optind < argc) {
server = strdup(argv[optind]);
colon = strchr(server, ':');
if (colon != NULL) {
server[colon - server] = '\0';
port = colon + 1;
}
}
/**** Shell Widget ****/
XtSetArg(args[0], XtNiconPixmap,
XCreateBitmapFromData(XtDisplay(toplevel),
XtScreen(toplevel)->root, xgps_bits,
xgps_width, xgps_height)); i++;
XtSetValues(toplevel, args, 1);
/**** Form widget ****/
base = XtCreateManagedWidget("pane", panedWidgetClass, toplevel, NULL, 0);
/**** Label widget (Title) ****/
XtSetArg(args[0], XtNlabel, "GPS Speedometer"); i++;
label = XtCreateManagedWidget("title", labelWidgetClass, base, args, 1);
/**** Label widget ****/
XtSetArg(args[0], XtNlabel, "Miles per Hour"); i++;
label = XtCreateManagedWidget("name", labelWidgetClass, base, args, 1);
/**** Tachometer widget ****/
tacho = XtCreateManagedWidget("meter",
tachometerWidgetClass,
base, NULL, 0);
XtRealizeWidget(toplevel);
gpsdata = gps_open(server, DEFAULT_GPSD_PORT);
if (!gpsdata) {
fprintf(stderr, "xgpsspeed: no gpsd running or network error (%d).\n", errno);
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;
}
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