xgps.c

gpsd, a popular GPS daemon.

	(void)XtVaCreateManagedWidget("Latitude", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		6,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		5,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		12,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		0,
	    NULL);
	(void)XtVaCreateManagedWidget("Longitude", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		12,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		5,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		18,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		0,
	    NULL);
	(void)XtVaCreateManagedWidget("Altitude", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		18,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		5,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		24,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		0,
	    NULL);
	(void)XtVaCreateManagedWidget("Speed", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		24,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		5,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		30,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		0,
	    NULL);

	text_1 = XtVaCreateManagedWidget("time",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		0,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		15,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		6,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		5,
	    NULL);
	text_2 = XtVaCreateManagedWidget("latitude",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		6,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		15,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		12,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		5,
	    NULL);
	text_3 = XtVaCreateManagedWidget("longitude",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		12,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		15,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		18,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		5,
	    NULL);
	text_4 = XtVaCreateManagedWidget("altitude",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		18,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		15,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		24,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		5,
	    NULL);
	text_5 = XtVaCreateManagedWidget("speed",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		24,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		15,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		30,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		5,
	    NULL);

	(void)XtVaCreateManagedWidget("EPH", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		0,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		20,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		6,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		15,
	    NULL);
	(void)XtVaCreateManagedWidget("EPV", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		6,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		20,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		12,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		15,
	    NULL);
	(void)XtVaCreateManagedWidget("Climb", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		12,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		20,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		18,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		15,
	    NULL);
	(void)XtVaCreateManagedWidget("Track", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		18,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		20,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		24,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		15,
	    NULL);
	(void)XtVaCreateManagedWidget("Status", xmLabelGadgetClass, gps_data,
	    XmNalignment,		XmALIGNMENT_END,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		24,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		20,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		30,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		15,
	    NULL);

	text_7 = XtVaCreateManagedWidget("eph",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		0,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		30,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		6,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		20,
	    NULL);
	text_8 = XtVaCreateManagedWidget("epv",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		6,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		30,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		12,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		20,
	    NULL);
	text_9 = XtVaCreateManagedWidget("climb",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		12,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		30,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		18,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		20,
	    NULL);
	text_6 = XtVaCreateManagedWidget("track",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		18,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		30,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		24,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		20,
	    NULL);
	text_10 = XtVaCreateManagedWidget("status",
	    xmTextFieldWidgetClass,	gps_data,
	    XmNeditable,		False,
	    XmNcursorPositionVisible,	False,
	    XmNtopAttachment,		XmATTACH_POSITION,
	    XmNtopPosition,		24,
	    XmNrightAttachment,		XmATTACH_POSITION,
	    XmNrightPosition,		30,
	    XmNbottomAttachment,	XmATTACH_POSITION,
	    XmNbottomPosition,		30,
	    XmNleftAttachment,		XmATTACH_POSITION,
	    XmNleftPosition,		20,
	    NULL);

	XtManageChild(gps_data);
	XtManageChild(sat_frame);
	XtManageChild(sky_frame);
	XtManageChild(gps_frame);

	XtVaSetValues(main_w,
	    XmNmenuBar,		menubar,
	    XmNworkWindow,	form,
	    NULL);

	XtRealizeWidget(toplevel);
	/*@ -type -nullpass @*/
	delw = XmInternAtom(XtDisplay(toplevel), "WM_DELETE_WINDOW",
	    (Boolean)False);
	(void)XmAddWMProtocolCallback(toplevel, delw, 
		(XtCallbackProc)quit_cb, NULL);
	/*@ +type +onlytrans @*/

	/* create empty list items to be replaced on update */
	string = XmStringCreateSimple(" ");
	for (i = 0; i <= MAXCHANNELS; i++)
		XmListAddItem(satellite_list, string, 0);
	XmStringFree(string);
}
/*@ +mustfreefresh -ignoresigns +immediatetrans @*/

/* runs when there is no data for a while */
static void
handle_time_out(XtPointer client_data, XtIntervalId *ignored)
{
	XmTextFieldSetString(text_10, "UNKNOWN");
}

static void
handle_input(XtPointer client_data, int *source, XtInputId *id)
{
	if (gps_poll(gpsdata) < 0) {
		XtRemoveInput(gps_input);
		(void)gps_close(gpsdata);
		XtRemoveTimeOut(timeout);
		XmTextFieldSetString(text_10, "No GPS data available");
		(void)err_dialog(toplevel, "No GPS data available.\n\n"
		    "Check the connection to gpsd and if gpsd is running");
		gps_lost = true;
		gps_timeout = XtAppAddTimeOut(app, 3000, handle_gps, app);
	}
}

/* runs on each sentence */
static void
update_panel(struct gps_data_t *gpsdata, char *message, 
	size_t len UNUSED, int level UNUSED)
{
	unsigned int i;
	int newstate;
	XmString string[MAXCHANNELS + 1];
	char s[128], *latlon, *sp;

	/* the raw data sisplay */
	if (message[0] != '\0')
		while (isspace(*(sp = message + strlen(message) - 1)))
			*sp = '\0';
	XmTextFieldSetString(status, message);

	/* This is for the satellite status display */
	if (gpsdata->satellites) {
		string[0] = XmStringCreateSimple(
		    "PRN:   Elev:  Azim:  SNR:  Used:");
		for (i = 0; i < MAXCHANNELS; i++) {
			if (i < (unsigned int)gpsdata->satellites) {
				(void)snprintf(s, sizeof(s),  
				    " %3d    %2d    %3d    %2d      %c", 
				    gpsdata->PRN[i], gpsdata->elevation[i],
				    gpsdata->azimuth[i], gpsdata->ss[i],
				    gpsdata->used[i] ? 'Y' : 'N');
			} else
			    (void)strlcpy(s, "                  ", sizeof(s));
			string[i + 1] = XmStringCreateSimple(s);
		}
		XmListReplaceItemsPos(satellite_list, string,
		    (int)sizeof(string), 1);
#ifndef S_SPLINT_S
		for (i = 0; i < (sizeof(string)/sizeof(string[0])); i++)
			XmStringFree(string[i]);
#endif /* S_SPLINT_S */
	}

	/* here are the value fields */
	if (isnan(gpsdata->fix.time)==0) {
	    (void)unix_to_iso8601(gpsdata->fix.time, s, sizeof(s));
		XmTextFieldSetString(text_1, s);
	} else
		XmTextFieldSetString(text_1, "n/a");
	if (gpsdata->fix.mode >= MODE_2D) {
		latlon = deg_to_str(deg_type,
		    fabs(gpsdata->fix.latitude));
		(void)snprintf(s, sizeof(s), "%s %c", latlon,
		    (gpsdata->fix.latitude < 0) ? 'S' : 'N');
		XmTextFieldSetString(text_2, s);
	} else
		XmTextFieldSetString(text_2, "n/a");
	if (gpsdata->fix.mode >= MODE_2D) {
		latlon = deg_to_str(deg_type,
		    fabs(gpsdata->fix.longitude));
		(void)snprintf(s, sizeof(s), "%s %c", latlon,
		    (gpsdata->fix.longitude < 0) ? 'W' : 'E');
		XmTextFieldSetString(text_3, s);
	} else
		XmTextFieldSetString(text_3, "n/a");
	if (gpsdata->fix.mode == MODE_3D) {
		(void)snprintf(s, sizeof(s), "%f %s",
		    gpsdata->fix.altitude * altunits->factor,
		    altunits->legend);
		XmTextFieldSetString(text_4, s);
	} else
		XmTextFieldSetString(text_4, "n/a");
	if (gpsdata->fix.mode >= MODE_2D && isnan(gpsdata->fix.track)==0) {
		(void)snprintf(s, sizeof(s), "%f %s",
		    gpsdata->fix.speed * speedunits->factor,
		    speedunits->legend);
		XmTextFieldSetString(text_5, s);
	} else
		XmTextFieldSetString(text_5, "n/a");
	if (gpsdata->fix.mode >= MODE_2D && isnan(gpsdata->fix.track)==0) {
		(void)snprintf(s, sizeof(s), "%f degrees",