/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*
* Authors:
* Damon Chaplin <damon@ximian.com>
* Bolian Yin <bolian.yin@sun.com>
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
*/
/*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "e-calendar.h"
#include <gtk/gtk.h>
#include <libgnomecanvas/gnome-canvas-widget.h>
#include <glib/gi18n.h>
#define E_CALENDAR_SMALL_FONT_PTSIZE 6
#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-*"
/* The space between the arrow buttons and the edge of the widget. */
#define E_CALENDAR_ARROW_BUTTON_X_PAD 2
#define E_CALENDAR_ARROW_BUTTON_Y_PAD 0
/* Vertical padding. The padding above the button includes the space for the
horizontal line. */
#define E_CALENDAR_YPAD_ABOVE_LOWER_BUTTONS 4
#define E_CALENDAR_YPAD_BELOW_LOWER_BUTTONS 3
/* Horizontal padding inside & between buttons. */
#define E_CALENDAR_IXPAD_BUTTONS 4
#define E_CALENDAR_XPAD_BUTTONS 8
/* The time between steps when the prev/next buttons is pressed, in 1/1000ths
of a second, and the number of timeouts we skip before we start
automatically moving back/forward. */
#define E_CALENDAR_AUTO_MOVE_TIMEOUT 150
#define E_CALENDAR_AUTO_MOVE_TIMEOUT_DELAY 2
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_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static void e_calendar_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time);
static gboolean e_calendar_button_has_focus (ECalendar *cal);
static gboolean e_calendar_focus (GtkWidget *widget,
GtkDirectionType direction);
static void e_calendar_on_prev_pressed (ECalendar *cal);
static void e_calendar_on_prev_released (ECalendar *cal);
static void e_calendar_on_prev_clicked (ECalendar *cal);
static void e_calendar_on_next_pressed (ECalendar *cal);
static void e_calendar_on_next_released (ECalendar *cal);
static void e_calendar_on_next_clicked (ECalendar *cal);
static void e_calendar_start_auto_move (ECalendar *cal,
gboolean moving_forward);
static gboolean e_calendar_auto_move_handler (gpointer data);
static void e_calendar_stop_auto_move (ECalendar *cal);
G_DEFINE_TYPE (ECalendar, e_calendar, 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;
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->drag_motion = e_calendar_drag_motion;
widget_class->drag_leave = e_calendar_drag_leave;
widget_class->focus = e_calendar_focus;
}
static void
e_calendar_init (ECalendar *cal)
{
GnomeCanvasGroup *canvas_group;
PangoFontDescription *small_font_desc;
GtkWidget *button, *pixmap;
AtkObject *a11y;
/* Create the small font. */
small_font_desc =
pango_font_description_copy (gtk_widget_get_style (GTK_WIDGET (cal))->font_desc);
pango_font_description_set_size (small_font_desc,
E_CALENDAR_SMALL_FONT_PTSIZE * PANGO_SCALE);
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_desc", small_font_desc,
NULL));
pango_font_description_free (small_font_desc);
/* Create the arrow buttons to move to the previous/next month. */
button = gtk_button_new ();
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
gtk_widget_show (button);
g_signal_connect_swapped (
button, "pressed",
G_CALLBACK (e_calendar_on_prev_pressed), cal);
g_signal_connect_swapped (
button, "released",
G_CALLBACK (e_calendar_on_prev_released), cal);
g_signal_connect_swapped (
button, "clicked",
G_CALLBACK (e_calendar_on_prev_clicked), cal);
pixmap = gtk_arrow_new (GTK_ARROW_LEFT, GTK_SHADOW_NONE);
gtk_widget_show (pixmap);
gtk_container_add (GTK_CONTAINER (button), pixmap);
cal->prev_item = gnome_canvas_item_new (canvas_group,
gnome_canvas_widget_get_type (),
"widget", button,
NULL);
a11y = gtk_widget_get_accessible (button);
atk_object_set_name (a11y, _("Previous"));
button = gtk_button_new ();
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
gtk_widget_show (button);
g_signal_connect_swapped (
button, "pressed",
G_CALLBACK (e_calendar_on_next_pressed), cal);
g_signal_connect_swapped (
button, "released",
G_CALLBACK (e_calendar_on_next_released), cal);
g_signal_connect_swapped (
button, "clicked",
G_CALLBACK (e_calendar_on_next_clicked), cal);
pixmap = gtk_arrow_new (GTK_ARROW_RIGHT, GTK_SHADOW_NONE);
gtk_widget_show (pixmap);
gtk_container_add (GTK_CONTAINER (button), pixmap);
cal->next_item = gnome_canvas_item_new (canvas_group,
gnome_canvas_widget_get_type (),
"widget", button,
NULL);
a11y = gtk_widget_get_accessible (button);
atk_object_set_name (a11y, _("Next"));
cal->min_rows = 1;
cal->min_cols = 1;
cal->max_rows = -1;
cal->max_cols = -1;
cal->timeout_id = 0;
}
/**
* e_calendar_new:
* @Returns: a new #ECalendar.
*
* Creates a new #ECalendar.
**/
GtkWidget *
e_calendar_new (void)
{
GtkWidget *cal;
AtkObject *a11y;
cal = g_object_new (e_calendar_get_type (), NULL);
a11y = gtk_widget_get_accessible (cal);
atk_object_set_name (a11y, _("Month Calendar"));
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);
if (cal->timeout_id != 0) {
g_source_remove (cal->timeout_id);
cal->timeout_id = 0;
}
if (GTK_OBJECT_CLASS (e_calendar_parent_class)->destroy)
(* GTK_OBJECT_CLASS (e_calendar_parent_class)->destroy) (object);
}
static void
e_calendar_realize (GtkWidget *widget)
{
(*GTK_WIDGET_CLASS (e_calendar_parent_class)->realize) (widget);
/* Set the background of the canvas window to the normal color,
or the arrow buttons are not displayed properly. */
gdk_window_set_background (GTK_LAYOUT (widget)->bin_window,
&widget->style->bg[GTK_STATE_NORMAL]);
}
static void
e_calendar_style_set (GtkWidget *widget,
GtkStyle *previous_style)
{
ECalendar *e_calendar;
e_calendar = E_CALENDAR(widget);
if (GTK_WIDGET_CLASS (e_calendar_parent_class)->style_set)
(*GTK_WIDGET_CLASS (e_calendar_parent_class)->style_set) (widget,
previous_style);
/* Set the background of the canvas window to the normal color,
or the arrow buttons are not displayed properly. */
if (GTK_WIDGET_REALIZED (widget->parent))
gdk_window_set_background (GTK_LAYOUT (widget)->bin_window,
&widget->style->bg[GTK_STATE_NORMAL]);
e_calendar_item_style_set (widget, e_calendar->calitem);
}
static void
e_calendar_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
ECalendar *cal;
GtkStyle *style;
gint col_width, row_height, width, height;
cal = E_CALENDAR (widget);
style = GTK_WIDGET (cal)->style;
g_object_get((cal->calitem),
"row_height", &row_height,
"column_width", &col_width,
NULL);
height = row_height * cal->min_rows;
width = col_width * cal->min_cols;
requisition->width = width + style->xthickness * 2;
requisition->height = height + style->ythickness * 2;
}
static void
e_calendar_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
ECalendar *cal;
PangoFontDescription *font_desc;
PangoContext *pango_context;
PangoFontMetrics *font_metrics;
gdouble old_x2, old_y2, new_x2, new_y2;
gdouble xthickness, ythickness, arrow_button_size;
cal = E_CALENDAR (widget);
xthickness = widget->style->xthickness;
ythickness = widget->style->ythickness;
(*GTK_WIDGET_CLASS (e_calendar_parent_class)->size_allocate) (widget, allocation);
/* Set up Pango prerequisites */
font_desc = gtk_widget_get_style (widget)->font_desc;
pango_context = gtk_widget_get_pango_context (widget);
font_metrics = pango_context_get_metrics (pango_context, font_desc,
pango_context_get_language (pango_context));
/* 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);
/* 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);
/* Position the arrow buttons. */
arrow_button_size =
PANGO_PIXELS (pango_font_metrics_get_ascent (font_metrics))
+ PANGO_PIXELS (pango_font_metrics_get_descent (font_metrics))
+ E_CALENDAR_ITEM_YPAD_ABOVE_MONTH_NAME
+ E_CALENDAR_ITEM_YPAD_BELOW_MONTH_NAME
- E_CALENDAR_ARROW_BUTTON_Y_PAD * 2;
gnome_canvas_item_set (cal->prev_item,
"x", (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
? new_x2 + 1 - xthickness * 2 - E_CALENDAR_ARROW_BUTTON_X_PAD
- arrow_button_size
: xthickness * 2 + E_CALENDAR_ARROW_BUTTON_X_PAD,
"y", ythickness * 2
+ E_CALENDAR_ARROW_BUTTON_Y_PAD,
"width", arrow_button_size,
"height", arrow_button_size,
NULL);
gnome_canvas_item_set (cal->next_item,
"x", (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
? xthickness * 2 + E_CALENDAR_ARROW_BUTTON_X_PAD
: new_x2 + 1 - xthickness * 2 - E_CALENDAR_ARROW_BUTTON_X_PAD
- arrow_button_size,
"y", ythickness * 2
+ E_CALENDAR_ARROW_BUTTON_Y_PAD,
"width", arrow_button_size,
"height", arrow_button_size,
NULL);
pango_font_metrics_unref (font_metrics);
}
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));
}
/* Returns the border size on each side of the month displays. */
void
e_calendar_get_border_size (ECalendar *cal,
gint *top,
gint *bottom,
gint *left,
gint *right)
{
GtkStyle *style;
g_return_if_fail (E_IS_CALENDAR (cal));
style = GTK_WIDGET (cal)->style;
if (style) {
*top = style->ythickness;
*bottom = style->ythickness;
*left = style->xthickness;
*right = style->xthickness;
} else {
*top = *bottom = *left = *right = 0;
}
}
static void
e_calendar_on_prev_pressed (ECalendar *cal)
{
e_calendar_start_auto_move (cal, FALSE);
}
static void
e_calendar_on_next_pressed (ECalendar *cal)
{
e_calendar_start_auto_move (cal, TRUE);
}
static void
e_calendar_start_auto_move (ECalendar *cal,
gboolean moving_forward)
{
if (cal->timeout_id == 0) {
cal->timeout_id = g_timeout_add (E_CALENDAR_AUTO_MOVE_TIMEOUT,
e_calendar_auto_move_handler,
cal);
}
cal->timeout_delay = E_CALENDAR_AUTO_MOVE_TIMEOUT_DELAY;
cal->moving_forward = moving_forward;
}
static gboolean
e_calendar_auto_move_handler (gpointer data)
{
ECalendar *cal;
ECalendarItem *calitem;
gint offset;
g_return_val_if_fail (E_IS_CALENDAR (data), FALSE);
cal = E_CALENDAR (data);
calitem = cal->calitem;
GDK_THREADS_ENTER ();
if (cal->timeout_delay > 0) {
cal->timeout_delay--;
} else {
offset = cal->moving_forward ? 1 : -1;
e_calendar_item_set_first_month (calitem, calitem->year,
calitem->month + offset);
}
GDK_THREADS_LEAVE ();
return TRUE;
}
static void
e_calendar_on_prev_released (ECalendar *cal)
{
e_calendar_stop_auto_move (cal);
}
static void
e_calendar_on_next_released (ECalendar *cal)
{
e_calendar_stop_auto_move (cal);
}
static void
e_calendar_stop_auto_move (ECalendar *cal)
{
if (cal->timeout_id != 0) {
g_source_remove (cal->timeout_id);
cal->timeout_id = 0;
}
}
static void
e_calendar_on_prev_clicked (ECalendar *cal)
{
e_calendar_item_set_first_month (cal->calitem, cal->calitem->year,
cal->calitem->month - 1);
}
static void
e_calendar_on_next_clicked (ECalendar *cal)
{
e_calendar_item_set_first_month (cal->calitem, cal->calitem->year,
cal->calitem->month + 1);
}
static gint
e_calendar_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
#if 0
g_print ("In e_calendar_drag_motion\n");
#endif
return FALSE;
}
static void
e_calendar_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
#if 0
g_print ("In e_calendar_drag_leave\n");
#endif
}
static gboolean
e_calendar_button_has_focus (ECalendar *cal)
{
GtkWidget *prev_widget, *next_widget;
gboolean ret_val;
g_return_val_if_fail (E_IS_CALENDAR (cal), FALSE);
prev_widget = GNOME_CANVAS_WIDGET(cal->prev_item)->widget;
next_widget = GNOME_CANVAS_WIDGET(cal->next_item)->widget;
ret_val = GTK_WIDGET_HAS_FOCUS (prev_widget) ||
GTK_WIDGET_HAS_FOCUS (next_widget);
return ret_val;
}
static gboolean
e_calendar_focus (GtkWidget *widget, GtkDirectionType direction)
{
#define E_CALENDAR_FOCUS_CHILDREN_NUM 3
ECalendar *cal;
GnomeCanvas *canvas;
GnomeCanvasItem *children[E_CALENDAR_FOCUS_CHILDREN_NUM];
gint focused_index = -1;
gint index;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (E_IS_CALENDAR (widget), FALSE);
cal = E_CALENDAR (widget);
canvas = GNOME_CANVAS (widget);
if (!GTK_WIDGET_CAN_FOCUS (widget))
return FALSE;
children[0] = GNOME_CANVAS_ITEM (cal->calitem);
children[1] = cal->prev_item;
children[2] = cal->next_item;
/* get current focused item, if e-calendar has had focus */
if (GTK_WIDGET_HAS_FOCUS (widget) || e_calendar_button_has_focus (cal))
for (index = 0; canvas->focused_item && index < E_CALENDAR_FOCUS_CHILDREN_NUM; ++index) {
if (children[index] == canvas->focused_item) {
focused_index = index;
break;
}
}
if (focused_index == -1)
if (direction == GTK_DIR_TAB_FORWARD)
focused_index = 0;
else
focused_index = E_CALENDAR_FOCUS_CHILDREN_NUM - 1;
else
if (direction == GTK_DIR_TAB_FORWARD)
++focused_index;
else
--focused_index;
if (focused_index < 0 ||
focused_index >= E_CALENDAR_FOCUS_CHILDREN_NUM)
/* move out of e-calendar */
return FALSE;
gnome_canvas_item_grab_focus (children[focused_index]);
if (GNOME_IS_CANVAS_WIDGET (children[focused_index])) {
widget = GNOME_CANVAS_WIDGET (children[focused_index])->widget;
gtk_widget_grab_focus (widget);
}
return TRUE;
}
void
e_calendar_set_focusable (ECalendar *cal, gboolean focusable)
{
GtkWidget *prev_widget, *next_widget;
g_return_if_fail (E_IS_CALENDAR (cal));
prev_widget = GNOME_CANVAS_WIDGET(cal->prev_item)->widget;
next_widget = GNOME_CANVAS_WIDGET(cal->next_item)->widget;
if (focusable) {
GTK_WIDGET_SET_FLAGS (cal, GTK_CAN_FOCUS);
GTK_WIDGET_SET_FLAGS (prev_widget, GTK_CAN_FOCUS);
GTK_WIDGET_SET_FLAGS (next_widget, GTK_CAN_FOCUS);
}
else {
if (GTK_WIDGET_HAS_FOCUS (cal) || e_calendar_button_has_focus (cal)) {
GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (cal));
if (toplevel)
gtk_widget_grab_focus (toplevel);
}
GTK_WIDGET_UNSET_FLAGS (cal, GTK_CAN_FOCUS);
GTK_WIDGET_UNSET_FLAGS (prev_widget, GTK_CAN_FOCUS);
GTK_WIDGET_UNSET_FLAGS (next_widget, GTK_CAN_FOCUS);
}
}
