new widget and canvas item to replace GtkCalendar. Not quite finished yet.

2000-07-25  Damon Chaplin  <damon@helixcode.com>

	* e-calendar-item.h:
	* e-calendar.[hc]: new widget and canvas item to replace GtkCalendar.
	Not quite finished yet.

svn path=/trunk/; revision=4322

1 files changed, 481 insertions, 0 deletions

diff --git a/widgets/misc/e-calendar.c b/widgets/misc/e-calendar.c
new file mode 100644
index 0000000000..638d50de56
--- /dev/null
+++ b/widgets/misc/e-calendar.c
@@ -0,0 +1,481 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/*
+ * Author :
+ *  Damon Chaplin <damon@helixcode.com>
+ *
+ * Copyright 2000, Helix Code, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+/*
+ * ECalendar - displays a table of monthly calendars, allowing highlighting
+ * and selection of one or more days. Like GtkCalendar with more features.
+ * Most of the functionality is in the ECalendarItem canvas item, though
+ * we also add GnomeCanvasWidget buttons to go to the previous/next month and
+ * to got to the current day.
+ */
+
+#include <config.h>
+#include <e-util/e-util.h>
+#include "e-calendar.h"
+
+#define E_CALENDAR_SMALL_FONT	\
+	"-adobe-utopia-regular-r-normal-*-*-100-*-*-p-*-iso8859-*"
+#define E_CALENDAR_SMALL_FONT_FALLBACK	\
+	"-adobe-helvetica-medium-r-normal-*-*-80-*-*-p-*-iso8859-*"
+
+#define E_CALENDAR_BUTTON_X_PAD	2
+#define E_CALENDAR_BUTTON_Y_PAD	0
+
+static void e_calendar_class_init	(ECalendarClass *class);
+static void e_calendar_init		(ECalendar	*cal);
+static void e_calendar_destroy		(GtkObject	*object);
+static void e_calendar_realize		(GtkWidget	*widget);
+static void e_calendar_style_set	(GtkWidget	*widget,
+					 GtkStyle	*previous_style);
+static void e_calendar_size_request	(GtkWidget      *widget,
+					 GtkRequisition *requisition);
+static void e_calendar_size_allocate	(GtkWidget	*widget,
+					 GtkAllocation	*allocation);
+static gint e_calendar_expose		(GtkWidget      *widget,
+					 GdkEventExpose *event);
+static void e_calendar_draw		(GtkWidget	*widget,
+					 GdkRectangle	*area);
+static gint e_calendar_button_press	(GtkWidget	*widget,
+					 GdkEventButton	*event);
+static gint e_calendar_button_release	(GtkWidget	*widget,
+					 GdkEventButton	*event);
+static gint e_calendar_focus_in		(GtkWidget	*widget,
+					 GdkEventFocus	*event);
+static gint e_calendar_focus_out	(GtkWidget	*widget,
+					 GdkEventFocus	*event);
+static gint e_calendar_key_press	(GtkWidget	*widget,
+					 GdkEventKey	*event);
+
+static void e_calendar_paint		(ECalendar	*cal,
+					 GdkRectangle	*area);
+
+static void e_calendar_on_prev_clicked	(ECalendar	*cal);
+static void e_calendar_on_next_clicked	(ECalendar	*cal);
+
+static GnomeCanvasClass *parent_class;
+static GtkLayoutClass *grandparent_class;
+
+E_MAKE_TYPE (e_calendar, "ECalendar", ECalendar,
+	     e_calendar_class_init, e_calendar_init, E_CANVAS_TYPE)
+
+
+static void
+e_calendar_class_init (ECalendarClass *class)
+{
+	GtkObjectClass *object_class;
+	GtkWidgetClass *widget_class;
+
+	object_class = (GtkObjectClass *) class;
+	widget_class = (GtkWidgetClass *) class;
+
+	parent_class = gtk_type_class (E_CANVAS_TYPE);
+	grandparent_class = gtk_type_class (GTK_TYPE_LAYOUT);
+
+	object_class->destroy = e_calendar_destroy;
+
+	widget_class->realize		   = e_calendar_realize;
+	widget_class->style_set		   = e_calendar_style_set;
+ 	widget_class->size_request	   = e_calendar_size_request;
+ 	widget_class->size_allocate	   = e_calendar_size_allocate;
+	widget_class->expose_event	   = e_calendar_expose;
+	widget_class->draw		   = e_calendar_draw;
+#if 0
+	widget_class->button_press_event   = e_calendar_button_press;
+	widget_class->button_release_event = e_calendar_button_release;
+#endif
+	widget_class->focus_in_event	   = e_calendar_focus_in;
+	widget_class->focus_out_event	   = e_calendar_focus_out;
+	widget_class->key_press_event	   = e_calendar_key_press;
+}
+
+
+static void
+e_calendar_init (ECalendar *cal)
+{
+	GnomeCanvasGroup *canvas_group;
+	GdkFont *small_font;
+	GtkWidget *button, *arrow;
+
+	/* Create the small font. */
+	small_font = gdk_font_load (E_CALENDAR_SMALL_FONT);
+	if (!small_font)
+		small_font = gdk_font_load (E_CALENDAR_SMALL_FONT_FALLBACK);
+	if (!small_font)
+		g_warning ("Couldn't load font");
+
+	canvas_group = GNOME_CANVAS_GROUP (GNOME_CANVAS (cal)->root);
+
+	cal->calitem = E_CALENDAR_ITEM (gnome_canvas_item_new (canvas_group,
+							       e_calendar_item_get_type (),
+							       "week_number_font", small_font,
+							       "week_start_day", 6,
+							       NULL));
+
+#if 0
+							       "show_week_numbers", TRUE,
+							       "minimum_columns", 5,
+							       "maximum_columns", 5,
+#endif
+
+	if (small_font)
+		gdk_font_unref (small_font);
+
+
+	button = gtk_button_new ();
+	/* FIXME: The buttons doesn't display properly if we do this. */
+	/*gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);*/
+	gtk_widget_show (button);
+	gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
+				   GTK_SIGNAL_FUNC (e_calendar_on_prev_clicked),
+				   GTK_OBJECT (cal));
+	arrow = gtk_arrow_new (GTK_ARROW_LEFT, GTK_SHADOW_OUT);
+	gtk_widget_show (arrow);
+	gtk_container_add (GTK_CONTAINER (button), arrow);
+	cal->prev_item = gnome_canvas_item_new (canvas_group,
+						gnome_canvas_widget_get_type (),
+						"widget", button,
+						NULL);
+
+	button = gtk_button_new ();
+	/*gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);*/
+	gtk_widget_show (button);
+	gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
+				   GTK_SIGNAL_FUNC (e_calendar_on_next_clicked),
+				   GTK_OBJECT (cal));
+	arrow = gtk_arrow_new (GTK_ARROW_RIGHT, GTK_SHADOW_OUT);
+	gtk_widget_show (arrow);
+	gtk_container_add (GTK_CONTAINER (button), arrow);
+	cal->next_item = gnome_canvas_item_new (canvas_group,
+						gnome_canvas_widget_get_type (),
+						"widget", button,
+						NULL);
+
+	cal->min_rows = 1;
+	cal->min_cols = 1;
+	cal->max_rows = -1;
+	cal->max_cols = -1;
+}
+
+
+/**
+ * e_calendar_new:
+ * @Returns: a new #ECalendar.
+ *
+ * Creates a new #ECalendar.
+ **/
+GtkWidget *
+e_calendar_new			(void)
+{
+	GtkWidget *cal;
+
+	cal = gtk_type_new (e_calendar_get_type ());
+
+	return cal;
+}
+
+
+static void
+e_calendar_destroy		(GtkObject *object)
+{
+	ECalendar *cal;
+
+	g_return_if_fail (object != NULL);
+	g_return_if_fail (E_IS_CALENDAR (object));
+
+	cal = E_CALENDAR (object);
+
+
+
+}
+
+
+static void
+e_calendar_realize (GtkWidget *widget)
+{
+	(*GTK_WIDGET_CLASS (parent_class)->realize) (widget);
+}
+
+
+static void
+e_calendar_style_set		(GtkWidget	*widget,
+				 GtkStyle	*previous_style)
+{
+}
+
+
+static void
+e_calendar_size_request		(GtkWidget      *widget,
+				 GtkRequisition *requisition)
+{
+	ECalendar *cal;
+	GtkStyle *style;
+	gdouble col_width, row_height;
+	gint width, height;
+
+	cal = E_CALENDAR (widget);
+	style = GTK_WIDGET (cal)->style;
+
+	gtk_object_get (GTK_OBJECT (cal->calitem),
+			"row_height", &row_height,
+			"column_width", &col_width,
+			NULL);
+
+	height = row_height * cal->min_rows;
+	width = col_width * cal->min_cols;
+
+	/* FIXME: Add on space for line & button if shown. */
+
+	requisition->width = width + style->klass->xthickness * 2;
+	requisition->height = height + style->klass->ythickness * 2;
+}
+
+
+static void
+e_calendar_size_allocate	(GtkWidget	*widget,
+				 GtkAllocation	*allocation)
+{
+	ECalendar *cal;
+	GdkFont *font;
+	gdouble old_x2, old_y2, new_x2, new_y2;
+	gdouble xthickness, ythickness, button_size;
+
+	cal = E_CALENDAR (widget);
+	font = widget->style->font;
+	xthickness = widget->style->klass->xthickness;
+	ythickness = widget->style->klass->ythickness;
+
+	(*GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
+
+	/* Set the scroll region to its allocated size, if changed. */
+	gnome_canvas_get_scroll_region (GNOME_CANVAS (cal),
+					NULL, NULL, &old_x2, &old_y2);
+	new_x2 = widget->allocation.width - 1;
+	new_y2 = widget->allocation.height - 1;
+	if (old_x2 != new_x2 || old_y2 != new_y2)
+		gnome_canvas_set_scroll_region (GNOME_CANVAS (cal),
+						0, 0, new_x2, new_y2);
+
+	/* FIXME: Take off space for line & buttons if shown. */
+	gnome_canvas_item_set (GNOME_CANVAS_ITEM (cal->calitem),
+			       "x1", 0.0,
+			       "y1", 0.0,
+			       "x2", new_x2,
+			       "y2", new_y2,
+			       NULL);
+
+	button_size = font->ascent + font->descent + E_CALENDAR_ITEM_YPAD1
+		+ E_CALENDAR_ITEM_YPAD2 - E_CALENDAR_BUTTON_Y_PAD * 2;
+
+	gnome_canvas_item_set (cal->prev_item,
+			       "x", xthickness * 2 + E_CALENDAR_BUTTON_X_PAD,
+			       "y", ythickness * 2 + E_CALENDAR_BUTTON_Y_PAD,
+			       "width", button_size,
+			       "height", button_size,
+			       NULL);
+
+	gnome_canvas_item_set (cal->next_item,
+			       "x", new_x2 + 1 - xthickness * 2
+			       - E_CALENDAR_BUTTON_X_PAD - button_size,
+			       "y", ythickness * 2 + E_CALENDAR_BUTTON_Y_PAD,
+			       "width", button_size,
+			       "height", button_size,
+			       NULL);
+}
+
+
+static gint
+e_calendar_expose		(GtkWidget      *widget,
+				 GdkEventExpose *event)
+{
+	ECalendar *cal;
+
+	cal = E_CALENDAR (widget);
+
+	(*GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
+
+	e_calendar_paint (cal, &event->area);
+
+	return FALSE;
+}
+
+
+static void
+e_calendar_draw			(GtkWidget	*widget,
+				 GdkRectangle	*area)
+{
+	ECalendar *cal;
+
+	cal = E_CALENDAR (widget);
+
+	(*GTK_WIDGET_CLASS (parent_class)->draw) (widget, area);
+
+	(*GTK_WIDGET_CLASS (grandparent_class)->draw) (widget, area);
+
+	e_calendar_paint (cal, area);
+}
+
+
+static void
+e_calendar_paint		(ECalendar	*cal,
+				 GdkRectangle	*area)
+{
+#if 0
+	g_print ("In e_calendar_paint: %i,%i %ix%i\n", area->x, area->y,
+		 area->width, area->height);
+#endif
+}
+
+
+
+static gint
+e_calendar_button_press		(GtkWidget	*widget,
+				 GdkEventButton	*event)
+{
+	ECalendar *cal;
+
+	cal = E_CALENDAR (widget);
+
+	g_print ("In e_calendar_button_press\n");
+
+	return FALSE;
+}
+
+
+static gint
+e_calendar_button_release	(GtkWidget	*widget,
+				 GdkEventButton	*event)
+{
+	g_print ("In e_calendar_button_release\n");
+
+	return FALSE;
+}
+
+
+static gint
+e_calendar_focus_in		(GtkWidget	*widget,
+				 GdkEventFocus	*event)
+{
+	return FALSE;
+}
+
+
+static gint
+e_calendar_focus_out		(GtkWidget	*widget,
+				 GdkEventFocus	*event)
+{
+	return FALSE;
+}
+
+
+static gint
+e_calendar_key_press		(GtkWidget	*widget,
+				 GdkEventKey	*event)
+{
+	return FALSE;
+}
+
+
+void
+e_calendar_set_minimum_size	(ECalendar	*cal,
+				 gint		 rows,
+				 gint		 cols)
+{
+	g_return_if_fail (E_IS_CALENDAR (cal));
+
+	cal->min_rows = rows;
+	cal->min_cols = cols;
+
+	gnome_canvas_item_set (GNOME_CANVAS_ITEM (cal->calitem),
+			       "minimum_rows", rows,
+			       "minimum_columns", cols,
+			       NULL);
+
+	gtk_widget_queue_resize (GTK_WIDGET (cal));
+}
+
+
+void
+e_calendar_set_maximum_size	(ECalendar	*cal,
+				 gint		 rows,
+				 gint		 cols)
+{
+	g_return_if_fail (E_IS_CALENDAR (cal));
+
+	cal->max_rows = rows;
+	cal->max_cols = cols;
+
+	gnome_canvas_item_set (GNOME_CANVAS_ITEM (cal->calitem),
+			       "maximum_rows", rows,
+			       "maximum_columns", cols,
+			       NULL);
+
+	gtk_widget_queue_resize (GTK_WIDGET (cal));
+}
+
+
+static void
+e_calendar_on_prev_clicked	(ECalendar	*cal)
+{
+	gint year, month;
+
+	gtk_object_get (GTK_OBJECT (cal->calitem),
+			"year", &year,
+			"month", &month,
+			NULL);
+
+	month--;
+	if (month == -1) {
+		year--;
+		month = 11;
+	}
+
+	gnome_canvas_item_set (GNOME_CANVAS_ITEM (cal->calitem),
+			       "year", year,
+			       "month", month,
+			       NULL);
+}
+
+
+static void
+e_calendar_on_next_clicked	(ECalendar	*cal)
+{
+	gint year, month;
+
+	gtk_object_get (GTK_OBJECT (cal->calitem),
+			"year", &year,
+			"month", &month,
+			NULL);
+
+	month++;
+	if (month == 12) {
+		year++;
+		month = 0;
+	}
+
+	gnome_canvas_item_set (GNOME_CANVAS_ITEM (cal->calitem),
+			       "year", year,
+			       "month", month,
+			       NULL);
+}
+