/* General-purpose monthly calendar canvas item for GNOME * * Copyright (C) 1998 Red Hat Software, Inc. * * Author: Federico Mena */ #include #include #include #include #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", "font", "-adobe-helvetica-medium-r-normal--12-*-72-72-p-*-iso8859-1", 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 + 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; } }