/* General-purpose monthly calendar canvas item for GNOME
*
* Copyright (C) 1998 Red Hat Software, Inc.
*
* Author: Federico Mena <federico@nuclecu.unam.mx>
*/
#include <config.h>
#include <math.h>
#include <time.h>
#include <gnome.h>
#include "gnome-month-item.h"
/* These are indices into the items array of a GnomeMonthItem structure */
enum {
ITEM_HEAD_GROUP = 0,
ITEM_HEAD_BOX = 7,
ITEM_HEAD_LABEL = 14
};
enum {
ARG_0,
ARG_YEAR,
ARG_MONTH,
ARG_X,
ARG_Y,
ARG_WIDTH,
ARG_HEIGHT,
ARG_ANCHOR,
ARG_PADDING,
ARG_DAY_NAMES,
ARG_HEADING_HEIGHT,
ARG_HEADING_ANCHOR,
ARG_START_ON_MONDAY
};
static void gnome_month_item_class_init (GnomeMonthItemClass *class);
static void gnome_month_item_init (GnomeMonthItem *mitem);
static void gnome_month_item_destroy (GtkObject *object);
static void gnome_month_item_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gnome_month_item_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static GnomeCanvasGroupClass *parent_class;
GtkType
gnome_month_item_get_type (void)
{
static GtkType month_item_type = 0;
if (!month_item_type) {
GtkTypeInfo month_item_info = {
"GnomeMonthItem",
sizeof (GnomeMonthItem),
sizeof (GnomeMonthItemClass),
(GtkClassInitFunc) gnome_month_item_class_init,
(GtkObjectInitFunc) gnome_month_item_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
month_item_type = gtk_type_unique (gnome_canvas_group_get_type (), &month_item_info);
}
return month_item_type;
}
static void
gnome_month_item_class_init (GnomeMonthItemClass *class)
{
GtkObjectClass *object_class;
GnomeCanvasItemClass *item_class;
object_class = (GtkObjectClass *) class;
item_class = (GnomeCanvasItemClass *) class;
parent_class = gtk_type_class (gnome_canvas_group_get_type ());
gtk_object_add_arg_type ("GnomeMonthItem::year", GTK_TYPE_UINT, GTK_ARG_READWRITE, ARG_YEAR);
gtk_object_add_arg_type ("GnomeMonthItem::month", GTK_TYPE_UINT, GTK_ARG_READWRITE, ARG_MONTH);
gtk_object_add_arg_type ("GnomeMonthItem::x", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X);
gtk_object_add_arg_type ("GnomeMonthItem::y", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y);
gtk_object_add_arg_type ("GnomeMonthItem::width", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_WIDTH);
gtk_object_add_arg_type ("GnomeMonthItem::height", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_HEIGHT);
gtk_object_add_arg_type ("GnomeMonthItem::anchor", GTK_TYPE_ANCHOR_TYPE, GTK_ARG_READWRITE, ARG_ANCHOR);
gtk_object_add_arg_type ("GnomeMonthItem::padding", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_PADDING);
gtk_object_add_arg_type ("GnomeMonthItem::day_names", GTK_TYPE_POINTER, GTK_ARG_READABLE, ARG_DAY_NAMES);
gtk_object_add_arg_type ("GnomeMonthItem::heading_height", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_HEADING_HEIGHT);
gtk_object_add_arg_type ("GnomeMonthItem::heading_anchor", GTK_TYPE_ANCHOR_TYPE, GTK_ARG_READWRITE, ARG_HEADING_ANCHOR);
gtk_object_add_arg_type ("GnomeMonthItem::start_on_monday", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_START_ON_MONDAY);
object_class->destroy = gnome_month_item_destroy;
object_class->set_arg = gnome_month_item_set_arg;
object_class->get_arg = gnome_month_item_get_arg;
}
/* Takes an anchor specification and the corners of a rectangle, and returns an anchored point with
* respect to that rectangle.
*/
static void
get_label_anchor (GtkAnchorType anchor, double x1, double y1, double x2, double y2, double *x, double *y)
{
switch (anchor) {
case GTK_ANCHOR_NW:
case GTK_ANCHOR_W:
case GTK_ANCHOR_SW:
*x = x1;
break;
case GTK_ANCHOR_N:
case GTK_ANCHOR_CENTER:
case GTK_ANCHOR_S:
*x = (x1 + x2) / 2.0;
break;
case GTK_ANCHOR_NE:
case GTK_ANCHOR_E:
case GTK_ANCHOR_SE:
*x = x2;
break;
}
switch (anchor) {
case GTK_ANCHOR_NW:
case GTK_ANCHOR_N:
case GTK_ANCHOR_NE:
*y = y1;
break;
case GTK_ANCHOR_W:
case GTK_ANCHOR_CENTER:
case GTK_ANCHOR_E:
*y = (y1 + y2) / 2.0;
break;
case GTK_ANCHOR_SW:
case GTK_ANCHOR_S:
case GTK_ANCHOR_SE:
*y = y2;
break;
}
}
/* Resets the position of the day name headings in the calendar */
static void
reshape_headings (GnomeMonthItem *mitem)
{
double width;
int i;
double x, y;
width = mitem->width / 7;
for (i = 0; i < 7; i++) {
/* Group */
gnome_canvas_item_set (mitem->items[ITEM_HEAD_GROUP + i],
"x", width * i,
"y", 0.0,
NULL);
/* Box */
gnome_canvas_item_set (mitem->items[ITEM_HEAD_BOX + i],
"x1", 0.0,
"y1", 0.0,
"x2", width,
"y2", mitem->head_height,
NULL);
/* Label */
get_label_anchor (mitem->head_anchor,
mitem->padding,
mitem->padding,
width - mitem->padding,
mitem->head_height - mitem->padding,
&x, &y);
gnome_canvas_item_set (mitem->items[ITEM_HEAD_LABEL + i],
"x", x,
"y", y,
"anchor", mitem->head_anchor,
NULL);
}
}
/* Changes the positions and resizes the items in the calendar to match the new size of the
* calendar.
*/
static void
reshape (GnomeMonthItem *mitem)
{
reshape_headings (mitem);
}
/* Creates the items for the day name headings */
static void
create_headings (GnomeMonthItem *mitem)
{
int i;
/* Just create the items; they will be positioned and configured by a call to reshape() */
for (i = 0; i < 7; i++) {
/* Group */
mitem->items[ITEM_HEAD_GROUP + i] =
gnome_canvas_item_new (GNOME_CANVAS_GROUP (mitem),
gnome_canvas_group_get_type (),
NULL);
/* Box */
mitem->items[ITEM_HEAD_BOX + i] =
gnome_canvas_item_new (GNOME_CANVAS_GROUP (mitem->items[ITEM_HEAD_GROUP + i]),
gnome_canvas_rect_get_type (),
"fill_color", "black",
NULL);
/* Label */
mitem->items[ITEM_HEAD_LABEL + i] =
gnome_canvas_item_new (GNOME_CANVAS_GROUP (mitem->items[ITEM_HEAD_GROUP + i]),
gnome_canvas_text_get_type (),
"fill_color", "white",
NULL);
}
}
/* Returns a normalized day index (as in sunday to saturday) based on a visible day index */
static int
get_day_index (GnomeMonthItem *mitem, int draw_index)
{
if (mitem->start_on_monday)
return (draw_index + 1) % 7;
else
return draw_index;
}
/* Resets the text of the day name headings */
static void
set_day_names (GnomeMonthItem *mitem)
{
int i;
for (i = 0; i < 7; i++)
gnome_canvas_item_set (mitem->items[ITEM_HEAD_LABEL + get_day_index (mitem, i)],
"text", mitem->day_names[get_day_index (mitem, i)],
NULL);
}
/* Creates all the canvas items that make up the calendar */
static void
create_items (GnomeMonthItem *mitem)
{
/* 7 heading groups
* 7 heading boxes
* 7 heading labels
* ------------------
* 21 items total
*/
mitem->items = g_new (GnomeCanvasItem *, 21);
create_headings (mitem);
/* FIXME */
/* Initialize by default to three-letter day names */
mitem->day_names[0] = _("Sun");
mitem->day_names[1] = _("Mon");
mitem->day_names[2] = _("Tue");
mitem->day_names[3] = _("Wed");
mitem->day_names[4] = _("Thu");
mitem->day_names[5] = _("Fri");
mitem->day_names[6] = _("Sat");
set_day_names (mitem);
reshape (mitem);
}
static void
gnome_month_item_init (GnomeMonthItem *mitem)
{
time_t t;
struct tm *tm;
/* Initialize to the current month by default */
t = time (NULL);
tm = localtime (&t);
mitem->year = tm->tm_year + 1900;
mitem->month = tm->tm_mon;
mitem->x = 0.0;
mitem->y = 0.0;
mitem->width = 150.0; /* not unreasonable defaults, I hope */
mitem->height = 100.0;
mitem->anchor = GTK_ANCHOR_NW;
mitem->padding = 0.0;
mitem->head_height = 14.0;
mitem->head_anchor = GTK_ANCHOR_CENTER;
}
GnomeCanvasItem *
gnome_month_item_new (GnomeCanvasGroup *parent)
{
GnomeMonthItem *mitem;
g_return_val_if_fail (parent != NULL, NULL);
g_return_val_if_fail (GNOME_IS_CANVAS_GROUP (parent), NULL);
mitem = GNOME_MONTH_ITEM (gnome_canvas_item_new (parent,
gnome_month_item_get_type (),
NULL));
gnome_month_item_construct (mitem);
return GNOME_CANVAS_ITEM (mitem);
}
void
gnome_month_item_construct (GnomeMonthItem *mitem)
{
g_return_if_fail (mitem != NULL);
g_return_if_fail (GNOME_IS_MONTH_ITEM (mitem));
create_items (mitem);
}
static void
free_day_names (GnomeMonthItem *mitem)
{
int i;
if (mitem->day_names[0])
for (i = 0; i < 7; i++)
g_free (mitem->day_names[i]);
}
static void
gnome_month_item_destroy (GtkObject *object)
{
GnomeMonthItem *mitem;
g_return_if_fail (object != NULL);
g_return_if_fail (GNOME_IS_MONTH_ITEM (object));
mitem = GNOME_MONTH_ITEM (object);
free_day_names (mitem);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
/* Recalculates the position of the toplevel calendar group based on the logical position and anchor */
static void
reanchor (GnomeMonthItem *mitem)
{
double x, y;
x = mitem->x;
y = mitem->y;
switch (mitem->anchor) {
case GTK_ANCHOR_NW:
case GTK_ANCHOR_W:
case GTK_ANCHOR_SW:
break;
case GTK_ANCHOR_N:
case GTK_ANCHOR_CENTER:
case GTK_ANCHOR_S:
x -= mitem->width / 2;
break;
case GTK_ANCHOR_NE:
case GTK_ANCHOR_E:
case GTK_ANCHOR_SE:
x -= mitem->width;
break;
}
switch (mitem->anchor) {
case GTK_ANCHOR_NW:
case GTK_ANCHOR_N:
case GTK_ANCHOR_NE:
break;
case GTK_ANCHOR_W:
case GTK_ANCHOR_CENTER:
case GTK_ANCHOR_E:
y -= mitem->height / 2;
break;
case GTK_ANCHOR_SW:
case GTK_ANCHOR_S:
case GTK_ANCHOR_SE:
y -= mitem->height;
break;
}
/* Explicitly use the canvas group class prefix since the month item class has x and y
* arguments as well.
*/
gnome_canvas_item_set (GNOME_CANVAS_ITEM (mitem),
"GnomeCanvasGroup::x", x,
"GnomeCanvasGroup::y", y,
NULL);
}
static void
recalc_month (GnomeMonthItem *mitem)
{
/* FIXME */
}
static void
gnome_month_item_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
GnomeMonthItem *mitem;
char **day_names;
int i;
mitem = GNOME_MONTH_ITEM (object);
switch (arg_id) {
case ARG_YEAR:
mitem->year = GTK_VALUE_UINT (*arg);
recalc_month (mitem);
break;
case ARG_MONTH:
mitem->month = GTK_VALUE_UINT (*arg);
recalc_month (mitem);
break;
case ARG_X:
mitem->x = GTK_VALUE_DOUBLE (*arg);
reanchor (mitem);
break;
case ARG_Y:
mitem->y = GTK_VALUE_DOUBLE (*arg);
reanchor (mitem);
break;
case ARG_WIDTH:
mitem->width = fabs (GTK_VALUE_DOUBLE (*arg));
reanchor (mitem);
reshape (mitem);
break;
case ARG_HEIGHT:
mitem->height = fabs (GTK_VALUE_DOUBLE (*arg));
reanchor (mitem);
reshape (mitem);
break;
case ARG_ANCHOR:
mitem->anchor = GTK_VALUE_ENUM (*arg);
reanchor (mitem);
break;
case ARG_PADDING:
mitem->padding = fabs (GTK_VALUE_DOUBLE (*arg));
reshape (mitem);
break;
case ARG_DAY_NAMES:
day_names = GTK_VALUE_POINTER (*arg);
/* First, check that none of the names is null */
for (i = 0; i < 7; i++)
if (!day_names[i]) {
g_warning ("Day number %d was NULL; day names cannot be NULL!", i);
return;
}
/* Set the new names */
free_day_names (mitem);
for (i = 0; i < 7; i++)
mitem->day_names[i] = g_strdup (day_names[i]);
set_day_names (mitem);
break;
case ARG_HEADING_HEIGHT:
mitem->head_height = fabs (GTK_VALUE_DOUBLE (*arg));
reshape (mitem);
break;
case ARG_HEADING_ANCHOR:
mitem->head_anchor = GTK_VALUE_ENUM (*arg);
reshape (mitem);
break;
case ARG_START_ON_MONDAY:
mitem->start_on_monday = GTK_VALUE_BOOL (*arg);
set_day_names (mitem);
break;
default:
break;
}
}
static void
gnome_month_item_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
GnomeMonthItem *mitem;
mitem = GNOME_MONTH_ITEM (object);
switch (arg_id) {
case ARG_YEAR:
GTK_VALUE_UINT (*arg) = mitem->year;
break;
case ARG_MONTH:
GTK_VALUE_UINT (*arg) = mitem->month;
break;
case ARG_X:
GTK_VALUE_DOUBLE (*arg) = mitem->x;
break;
case ARG_Y:
GTK_VALUE_DOUBLE (*arg) = mitem->y;
break;
case ARG_WIDTH:
GTK_VALUE_DOUBLE (*arg) = mitem->width;
break;
case ARG_HEIGHT:
GTK_VALUE_DOUBLE (*arg) = mitem->height;
break;
case ARG_ANCHOR:
GTK_VALUE_ENUM (*arg) = mitem->anchor;
break;
case ARG_PADDING:
GTK_VALUE_DOUBLE (*arg) = mitem->padding;
break;
case ARG_HEADING_HEIGHT:
GTK_VALUE_DOUBLE (*arg) = mitem->head_height;
break;
case ARG_HEADING_ANCHOR:
GTK_VALUE_ENUM (*arg) = mitem->head_anchor;
break;
case ARG_START_ON_MONDAY:
GTK_VALUE_BOOL (*arg) = mitem->start_on_monday;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
