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/* gkrellmoon.c
* Copyright (C) 2001,2002, Dale P. Smith, Altus Technologies Corporation
*/
#include <gkrellm2/gkrellm.h>
#include <X11/X.h>
#include "moon_60.xpm"
/* #define SPINNING 1 */
#define IMAGE_WIDTH 48
#define IMAGE_HEIGHT 48
#define IMAGE_COUNT 60
#define STYLE_NAME "moon"
#define PLUGIN_CONFIG_KEYWORD "moon"
#define MOONCLOCK_MAJOR_VERSION 0
#define MOONCLOCK_MINOR_VERSION 5
typedef struct {
int longitude;
int latitude;
int age;
int fraction;
int illumination;
int visible;
int riseset;
#ifdef SPINNING
int testing;
#endif
} Options;
static GkrellmMonitor *monitor;
static GkrellmPanel *panel;
static Options options;
static gint style_id;
static GtkWidget *longitude_spin_button;
static GtkWidget *latitude_spin_button;
static GtkWidget *age_button;
static GtkWidget *fraction_button;
static GtkWidget *illumination_button;
static GtkWidget *visible_button;
static GtkWidget *riseset_button;
#ifdef SPINNING
static GtkWidget *testing_button;
#endif
static GdkPixmap *moon_image = NULL;
static GdkBitmap *moon_mask = NULL;
static GkrellmDecal *moon = NULL;
static GtkTooltips *tooltip;
#include "CalcEphem.h"
#include "MoonRise.h"
typedef struct CTrans MoonData;
static MoonData moondata;
static void update_tooltip(MoonData *moon);
static void
update_moon_data(MoonData * moon)
{
struct tm *time_struc; /* The tm struct is defined in <time.h> */
time_t current_gmt;
gdouble local_std_time, univ_time, eot;
glong date;
gint day_of_month, month, year;
current_gmt = time(CurrentTime); /* CurrentTime defined in <X11/X.h> */
time_struc = gmtime(¤t_gmt);
univ_time =
time_struc->tm_hour + time_struc->tm_min / 60.0 +
time_struc->tm_sec / 3600.0;
/* The date needs to be the date in UTC, i.e. in greenwich, so
* be sure not to call the localtime function until after date
* has been set (there's only one tm structure). */
year = time_struc->tm_year + 1900;
month = time_struc->tm_mon + 1;
day_of_month = time_struc->tm_mday;
date = year * 10000 + month * 100 + day_of_month;
time_struc = localtime(¤t_gmt);
local_std_time =
time_struc->tm_hour + time_struc->tm_min / 60.0 +
time_struc->tm_sec / 3600.0;
moon->Glat = options.latitude;
moon->Glon = options.longitude;
CalcEphem(date, univ_time, moon);
moon->LST = local_std_time;
moon->LMT = univ_time - moon->Glon / 15.0;
if (moon->LMT < 0.0)
moon->LMT += 24.0;
if (moon->LMT > 24.0)
moon->LMT -= 24.0;
/* eot is the equation of time. gmst is Greenwich Sidereal
* Time. This equation below is correct, but confusing at
* first. It's easy to see when you draw the following
* picture: A sphere with 0 and 180 degree longitude, North on
* top, a meridian for the real sun, a meridian for a fictive
* average sun, a meridian denoting the vernal equinox. Note
* that universal time is the hour angle between 180 degrees
* and the fictive sun's meridian measured clockwise. gmst is
* the hour angle between 0 degrees and the meridian of the
* vernal equinox measured clockwise. RA_sun/15.0 is the hour
* angle of the real sun measured counterclockwise from the
* vernal equinox. eot is the difference between the real and
* the fictive sun. Looking at the picture, it's easy to see
* that 12=RA_sun/15-gmst+eot+utc (12 hours = 180 deg.) */
eot =
12.0 - univ_time + moon->gmst - moon->RA_sun / 15.0;
if (eot < 0.0)
eot += 24.0;
if (eot > 24.0)
eot -= 24.0;
moon->LAT = moon->LMT + eot;
if (moon->LAT < 0.0)
moon->LAT += 24.0;
if (moon->LAT > 24.0)
moon->LAT -= 24.0;
update_tooltip(moon);
}
static int
moon_image_number(MoonData * moon)
{
gdouble image_float;
gint image_int;
gint image_number;
/* MoonPhase expresses phase of moon as fraction of 1; 0.5=full. */
image_float = moon->MoonPhase * (gdouble) IMAGE_COUNT;
image_int = (gint) image_float;
if ((image_float - image_int) >= 0.5)
image_number = (image_int + 1) % IMAGE_COUNT;
else
image_number = image_int % IMAGE_COUNT;
return image_number;
}
static void
moon_update_plugin()
{
static int image_number;
/* Draw plugin specific data on the chart */
/* Use xlib or gdk functions, or gkrellm_draw_chart() if applicable */
#ifdef SPINNING
if (GK.minute_tick) {
update_moon_data(&moondata);
}
if (options.testing) {
++image_number;
image_number %= IMAGE_COUNT;
} else {
image_number = moon_image_number(&moondata);
}
#else
if (GK.minute_tick) {
update_moon_data(&moondata);
}
image_number = moon_image_number(&moondata);
#endif
gkrellm_draw_decal_pixmap(panel, moon, image_number);
gkrellm_draw_panel_layers(panel);
}
#define HOUR(time) ((gint) (time))
#define MINUTE(time) ((gint) ((ABS(time - HOUR(time))) * 60))
#define ANGLE_HOUR(angle) ((gint) (angle / 15.0))
#define ANGLE_MINUTE(angle) ((gint) ((ABS(angle - ANGLE_HOUR(angle) * 15.0)) * 4.0))
static void
calc_riseset_time(CTrans * c, const char * day, GString *mboxes)
{
gchar buf[128];
gdouble rise, set;
MoonRise(c, &rise, &set);
snprintf(buf, sizeof(buf), "\n%s: ", day);
g_string_append(mboxes, buf);
if (abs(rise) > 24.0) {
snprintf(buf, sizeof(buf), "no rise ");
g_string_append(mboxes, buf);
} else {
snprintf(buf, sizeof(buf), "%02d:%02d ", HOUR(rise), MINUTE(rise));
g_string_append(mboxes, buf);
}
if (abs(set) > 24.0) {
snprintf(buf, sizeof(buf), "no set");
g_string_append(mboxes, buf);
} else {
snprintf(buf, sizeof(buf), "%02d:%02d", HOUR(set), MINUTE(set));
g_string_append(mboxes, buf);
}
}
static void
update_tooltip(MoonData *moon)
{
GString *mboxes = NULL;
gchar buf[128];
if (tooltip == NULL)
return;
mboxes = g_string_sized_new(512);
g_string_append(mboxes, "MoonClock");
#if 0
format_time("A: ", moon->A_moon);
format_time("h: ", moon->h_moon);
printf("EarthMoon Distance: %5.1f Re", moon->EarthMoonDistance);
#endif
#if 0
format_angle_hours("RA:", buf, sizeof(buf), moon->RA_moon);
format_time("Declination: ", moon->DEC_moon);
printf("EarthMoon Distance: %5.1f Re", moon->EarthMoonDistance);
printf("\n");
#endif
if (options.age) {
snprintf(buf, sizeof(buf), "\nAge: %2.2f Days", moon->MoonAge);
g_string_append(mboxes, buf);
}
if (options.fraction) {
snprintf(buf, sizeof(buf), "\nFrac: %5.1f%%", 100 * moon->MoonPhase);
g_string_append(mboxes, buf);
}
if (options.illumination) {
snprintf(buf, sizeof(buf), "\nIllum: %5.1f%%",
50.0 * (1.0 - cos(moon->MoonPhase * 6.2831853)));
g_string_append(mboxes, buf);
}
if (options.visible) {
snprintf(buf, sizeof(buf), "\nVisible: %s",
moon->Visible ? "Yes" : "No");
g_string_append(mboxes, buf);
}
if (options.riseset) {
snprintf(buf, sizeof(buf), "\n- Rise and Set times -");
g_string_append(mboxes, buf);
moon->day -= 1;
calc_riseset_time(moon, "Yesterday", mboxes);
moon->day += 1;
calc_riseset_time(moon, "Today", mboxes);
moon->day += 1;
calc_riseset_time(moon, "Tomorrrow", mboxes);
moon->day -= 1;
}
gtk_tooltips_set_tip(tooltip, panel->drawing_area, mboxes->str, NULL);
gtk_tooltips_set_delay(tooltip, 750);
gtk_tooltips_enable(tooltip);
if (mboxes)
g_string_free(mboxes, TRUE);
}
static gint
panel_expose_event(GtkWidget *widget, GdkEventExpose *ev)
{
gdk_draw_pixmap(widget->window,
widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
panel->pixmap, ev->area.x, ev->area.y, ev->area.x, ev->area.y,
ev->area.width, ev->area.height);
return FALSE;
}
static void
panel_button_event(GtkWidget *widget, GdkEventButton *event, gpointer data)
{
if (event->button == 3)
gkrellm_open_config_window(monitor);
}
static void
load_images()
{
GkrellmPiximage *image = NULL;
gkrellm_load_piximage(NULL, moon_60_xpm, &image, NULL);
gkrellm_scale_piximage_to_pixmap(image, &moon_image, &moon_mask, 0, 0);
}
static void
moon_create_plugin(GtkWidget *vbox, gint first_create)
{
GkrellmStyle *style = NULL;
load_images();
if (first_create)
panel = gkrellm_panel_new0();
else {
gkrellm_destroy_decal_list(panel);
}
style = gkrellm_meter_style(style_id);
moon = gkrellm_create_decal_pixmap(panel, moon_image, moon_mask,
IMAGE_COUNT, style, 0, 0);
moon->x = (gkrellm_chart_width() - IMAGE_WIDTH) / 2;
panel->textstyle = gkrellm_meter_textstyle(style_id);
gkrellm_panel_configure(panel, NULL, style);
gkrellm_panel_create(vbox, monitor, panel);
if (first_create) {
gtk_signal_connect(GTK_OBJECT(panel->drawing_area),
"expose_event", (GtkSignalFunc) panel_expose_event,
NULL);
gtk_signal_connect(GTK_OBJECT(panel->drawing_area),
"button_release_event", (GtkSignalFunc) panel_button_event,
NULL);
tooltip = gtk_tooltips_new();
}
update_moon_data(&moondata);
gkrellm_draw_decal_pixmap(panel, moon, moon_image_number(&moondata));
}
static void
moon_create_tab(GtkWidget *tab_vbox)
{
GtkWidget *tabs;
GtkWidget *vbox;
tabs = gtk_notebook_new();
gtk_notebook_set_tab_pos(GTK_NOTEBOOK(tabs), GTK_POS_TOP);
gtk_box_pack_start(GTK_BOX(tab_vbox), tabs, TRUE, TRUE, 0);
/* --Setup Tab */
vbox = gkrellm_gtk_notebook_page(tabs, _("Setup"));
gkrellm_gtk_spin_button(vbox, &longitude_spin_button,
(gfloat) options.longitude,
-180.0, 180.0, 1.0, 1.0, 0, 60, NULL, NULL,
FALSE, _("Longitude (decimal degrees + = W, - = E)"));
gkrellm_gtk_spin_button(vbox, &latitude_spin_button,
(gfloat) options.latitude,
-90.0, 90.0, 1.0, 1.0, 0, 60, NULL, NULL,
FALSE, _("Latitude (decimal degrees + = N, - = S)"));
gkrellm_gtk_check_button(vbox, &age_button,
options.age,
TRUE, 0, _("Age"));
gkrellm_gtk_check_button(vbox, &fraction_button,
options.fraction,
TRUE, 0, _("Fraction"));
gkrellm_gtk_check_button(vbox, &illumination_button,
options.illumination,
TRUE, 0, _("Illumination"));
gkrellm_gtk_check_button(vbox, &visible_button,
options.visible,
TRUE, 0, _("Visible"));
gkrellm_gtk_check_button(vbox, &riseset_button,
options.riseset,
TRUE, 0, _("Rise and Set"));
#ifdef SPINNING
gkrellm_gtk_check_button(vbox, &testing_button,
options.testing,
TRUE, 0, _("Spin images fast"));
#endif
/* ----------------- info text --------------------*/
{
GtkWidget *text;
gchar *info_text[] = {
"<b>Gkrellm Moonclock Plugin\n\n",
"\"Ya gotta have a moon clock!\"\n\n",
"<b>Longitude and Latitude:\n",
"\tPostitive is North and West, Negative is South and East\n\n",
"The following options contol what is displayed in the tooltip:\n\n",
"<b>Age:\n",
"\tthe number of days since the last new moon\n",
"<b>Fraction:\n",
"\tthe fraction of the way through the lunar cycle (50 is full moon)\n",
"<b>Illumination:\n",
"\tthe fraction of the disk that's illuminated\n",
"<b>Visible:\n",
"\tIs the moon aboove the horizon\n",
"<b>Rise and Set:\n",
"\ttimes for Yesterday, Today, and Tomorrow\n"
};
vbox = gkrellm_gtk_notebook_page(tabs, _("Info"));
text = gkrellm_gtk_scrolled_text_view(vbox, NULL,
GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gkrellm_gtk_text_view_append_strings(text, info_text,
sizeof(info_text)/sizeof(gchar *));
}
/* ----------------- about text --------------------*/
{
gchar *plugin_about_text;
GtkWidget *label, *text;
plugin_about_text = g_strdup_printf(
"MoonClock %d.%d\n"
"GKrellM MoonClock Plugin\n\n"
"Copyright (C) 2001,2002 Dale P. Smith\n"
"dsmith@altustech.com\n\n"
"Released under the GNU Public Licence",
MOONCLOCK_MAJOR_VERSION, MOONCLOCK_MINOR_VERSION);
text = gtk_label_new(plugin_about_text);
label = gtk_label_new("About");
gtk_notebook_append_page(GTK_NOTEBOOK(tabs), text, label);
g_free(plugin_about_text);
}
}
static void
moon_apply_config()
{
options.longitude = gtk_spin_button_get_value_as_int(
GTK_SPIN_BUTTON(longitude_spin_button));
options.latitude = gtk_spin_button_get_value_as_int(
GTK_SPIN_BUTTON(latitude_spin_button));
options.age = GTK_TOGGLE_BUTTON(age_button)->active;
options.fraction = GTK_TOGGLE_BUTTON(fraction_button)->active;
options.illumination = GTK_TOGGLE_BUTTON(illumination_button)->active;
options.visible = GTK_TOGGLE_BUTTON(visible_button)->active;
options.riseset = GTK_TOGGLE_BUTTON(riseset_button)->active;
#ifdef SPINNING
options.testing = GTK_TOGGLE_BUTTON(testing_button)->active;
#endif
update_tooltip(&moondata);
}
static void
moon_save_config (FILE *f)
{
fprintf(f, "%s longitude %d\n", PLUGIN_CONFIG_KEYWORD, options.longitude);
fprintf(f, "%s latitude %d\n", PLUGIN_CONFIG_KEYWORD, options.latitude);
fprintf(f, "%s age %d\n", PLUGIN_CONFIG_KEYWORD, options.age);
fprintf(f, "%s fraction %d\n", PLUGIN_CONFIG_KEYWORD, options.fraction);
fprintf(f, "%s illumination %d\n", PLUGIN_CONFIG_KEYWORD, options.illumination);
fprintf(f, "%s visible %d\n", PLUGIN_CONFIG_KEYWORD, options.visible);
fprintf(f, "%s risefall %d\n", PLUGIN_CONFIG_KEYWORD, options.riseset);
#ifdef SPINNING
fprintf(f, "%s testing %d\n", PLUGIN_CONFIG_KEYWORD, options.testing);
#endif
}
static void
moon_load_config (gchar *arg)
{
gchar config[64], item[256];
gint n;
n = sscanf(arg, "%s %[^\n]", config, item);
if (n != 2)
return;
if (strcmp(config, "longitude") == 0)
sscanf(item, "%d\n", &(options.longitude));
if (strcmp(config, "latitude") == 0)
sscanf(item, "%d\n", &(options.latitude));
if (strcmp(config, "age") == 0)
sscanf(item, "%d\n", &(options.age));
if (strcmp(config, "fraction") == 0)
sscanf(item, "%d\n", &(options.fraction));
if (strcmp(config, "illumination") == 0)
sscanf(item, "%d\n", &(options.illumination));
if (strcmp(config, "visible") == 0)
sscanf(item, "%d\n", &(options.visible));
if (strcmp(config, "risefall") == 0)
sscanf(item, "%d\n", &(options.riseset));
#ifdef SPINNING
if (strcmp(config, "testing") == 0)
sscanf(item, "%d\n", &(options.testing));
#endif
}
static GkrellmMonitor plugin_mon = {
"Moon Clock", /* Name, for config tab. */
0, /* Id, 0 if a plugin */
moon_create_plugin, /* The create_plugin() function */
moon_update_plugin, /* The update_plugin() function */
moon_create_tab, /* The create_plugin_tab() config function */
moon_apply_config, /* The apply_plugin_config() function */
moon_save_config, /* The save_plugin_config() function */
moon_load_config, /* The load_plugin_config() function */
PLUGIN_CONFIG_KEYWORD, /* config keyword */
NULL, /* Undefined 2 */
NULL, /* Undefined 1 */
NULL, /* private */
MON_INSERT_AFTER|MON_CLOCK, /* Insert plugin before this monitor. */
NULL, /* Handle if a plugin, filled in by GKrellM */
NULL /* path if a plugin, filled in by GKrellM */
};
GkrellmMonitor *
gkrellm_init_plugin(void)
{
options.longitude = 81; /* Where I live! */
options.latitude = 44;
style_id = gkrellm_add_meter_style(&plugin_mon, STYLE_NAME);
return (monitor = &plugin_mon);
}
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