/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* e-canvas-vbox.c
* Copyright (C) 2000 Helix Code, Inc.
* Author: Chris Lahey <clahey@helixcode.com>
*
* This library 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 library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <gnome.h>
#include <math.h>
#include "e-canvas-vbox.h"
#include "e-canvas-utils.h"
#include "e-canvas.h"
#include "gal/util/e-util.h"
static void e_canvas_vbox_init (ECanvasVbox *CanvasVbox);
static void e_canvas_vbox_class_init (ECanvasVboxClass *klass);
static void e_canvas_vbox_set_arg (GtkObject *o, GtkArg *arg, guint arg_id);
static void e_canvas_vbox_get_arg (GtkObject *object, GtkArg *arg, guint arg_id);
static void e_canvas_vbox_destroy (GtkObject *object);
static gint e_canvas_vbox_event (GnomeCanvasItem *item, GdkEvent *event);
static void e_canvas_vbox_realize (GnomeCanvasItem *item);
static void e_canvas_vbox_reflow (GnomeCanvasItem *item, int flags);
static void e_canvas_vbox_real_add_item(ECanvasVbox *e_canvas_vbox, GnomeCanvasItem *item);
static void e_canvas_vbox_resize_children (GnomeCanvasItem *item);
static GnomeCanvasGroupClass *parent_class = NULL;
/* The arguments we take */
enum {
ARG_0,
ARG_WIDTH,
ARG_HEIGHT,
ARG_SPACING,
};
GtkType
e_canvas_vbox_get_type (void)
{
static GtkType type = 0;
if (!type)
{
static const GtkTypeInfo info =
{
"ECanvasVbox",
sizeof (ECanvasVbox),
sizeof (ECanvasVboxClass),
(GtkClassInitFunc) e_canvas_vbox_class_init,
(GtkObjectInitFunc) e_canvas_vbox_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
type = gtk_type_unique (gnome_canvas_group_get_type (), &info);
}
return type;
}
static void
e_canvas_vbox_class_init (ECanvasVboxClass *klass)
{
GtkObjectClass *object_class;
GnomeCanvasItemClass *item_class;
object_class = (GtkObjectClass*) klass;
item_class = (GnomeCanvasItemClass *) klass;
parent_class = gtk_type_class (gnome_canvas_group_get_type ());
gtk_object_add_arg_type ("ECanvasVbox::width", GTK_TYPE_DOUBLE,
GTK_ARG_READWRITE, ARG_WIDTH);
gtk_object_add_arg_type ("ECanvasVbox::height", GTK_TYPE_DOUBLE,
GTK_ARG_READABLE, ARG_HEIGHT);
gtk_object_add_arg_type ("ECanvasVbox::spacing", GTK_TYPE_DOUBLE,
GTK_ARG_READWRITE, ARG_SPACING);
klass->add_item = e_canvas_vbox_real_add_item;
object_class->set_arg = e_canvas_vbox_set_arg;
object_class->get_arg = e_canvas_vbox_get_arg;
object_class->destroy = e_canvas_vbox_destroy;
/* GnomeCanvasItem method overrides */
item_class->event = e_canvas_vbox_event;
item_class->realize = e_canvas_vbox_realize;
}
static void
e_canvas_vbox_init (ECanvasVbox *vbox)
{
vbox->items = NULL;
vbox->width = 10;
vbox->height = 10;
vbox->spacing = 0;
e_canvas_item_set_reflow_callback(GNOME_CANVAS_ITEM(vbox), e_canvas_vbox_reflow);
}
static void
e_canvas_vbox_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
GnomeCanvasItem *item;
ECanvasVbox *e_canvas_vbox;
item = GNOME_CANVAS_ITEM (o);
e_canvas_vbox = E_CANVAS_VBOX (o);
switch (arg_id){
case ARG_WIDTH:
e_canvas_vbox->width = GTK_VALUE_DOUBLE (*arg);
e_canvas_vbox_resize_children(item);
e_canvas_item_request_reflow(item);
break;
case ARG_SPACING:
e_canvas_vbox->spacing = GTK_VALUE_DOUBLE (*arg);
e_canvas_item_request_reflow(item);
break;
}
}
static void
e_canvas_vbox_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
ECanvasVbox *e_canvas_vbox;
e_canvas_vbox = E_CANVAS_VBOX (object);
switch (arg_id) {
case ARG_WIDTH:
GTK_VALUE_DOUBLE (*arg) = e_canvas_vbox->width;
break;
case ARG_HEIGHT:
GTK_VALUE_DOUBLE (*arg) = e_canvas_vbox->height;
break;
case ARG_SPACING:
GTK_VALUE_DOUBLE (*arg) = e_canvas_vbox->spacing;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static void
e_canvas_vbox_destroy (GtkObject *object)
{
ECanvasVbox *vbox = E_CANVAS_VBOX(object);
g_list_foreach(vbox->items, (GFunc) gtk_object_unref, NULL);
g_list_free(vbox->items);
vbox->items = NULL;
GTK_OBJECT_CLASS(parent_class)->destroy (object);
}
static gint
e_canvas_vbox_event (GnomeCanvasItem *item, GdkEvent *event)
{
gint return_val = TRUE;
switch (event->type) {
case GDK_KEY_PRESS:
switch (event->key.keyval) {
case GDK_Left:
case GDK_KP_Left:
case GDK_Right:
case GDK_KP_Right:
case GDK_Down:
case GDK_KP_Down:
case GDK_Up:
case GDK_KP_Up:
case GDK_Return:
case GDK_KP_Enter:
return_val = TRUE;
break;
default:
return_val = FALSE;
break;
}
break;
default:
return_val = FALSE;
break;
}
if (!return_val) {
if (GNOME_CANVAS_ITEM_CLASS(parent_class)->event)
return GNOME_CANVAS_ITEM_CLASS (parent_class)->event (item, event);
}
return return_val;
}
static void
e_canvas_vbox_realize (GnomeCanvasItem *item)
{
if (GNOME_CANVAS_ITEM_CLASS(parent_class)->realize)
(* GNOME_CANVAS_ITEM_CLASS(parent_class)->realize) (item);
e_canvas_vbox_resize_children(item);
e_canvas_item_request_reflow(item);
}
static void
e_canvas_vbox_remove_item (GnomeCanvasItem *item, ECanvasVbox *vbox)
{
vbox->items = g_list_remove(vbox->items, item);
gtk_object_unref(GTK_OBJECT(vbox));
}
static void
e_canvas_vbox_real_add_item(ECanvasVbox *e_canvas_vbox, GnomeCanvasItem *item)
{
e_canvas_vbox->items = g_list_append(e_canvas_vbox->items, item);
gtk_object_ref(GTK_OBJECT(item));
gtk_object_ref(GTK_OBJECT(e_canvas_vbox));
gtk_signal_connect(GTK_OBJECT(item), "destroy",
GTK_SIGNAL_FUNC(e_canvas_vbox_remove_item), e_canvas_vbox);
if ( GTK_OBJECT_FLAGS( e_canvas_vbox ) & GNOME_CANVAS_ITEM_REALIZED ) {
gnome_canvas_item_set(item,
"width", (double) e_canvas_vbox->width,
NULL);
e_canvas_item_request_reflow(item);
}
}
static void
e_canvas_vbox_resize_children (GnomeCanvasItem *item)
{
GList *list;
ECanvasVbox *e_canvas_vbox;
e_canvas_vbox = E_CANVAS_VBOX (item);
for ( list = e_canvas_vbox->items; list; list = list->next ) {
GnomeCanvasItem *child = GNOME_CANVAS_ITEM(list->data);
gnome_canvas_item_set(child,
"width", (double) e_canvas_vbox->width,
NULL);
}
}
static void
e_canvas_vbox_reflow( GnomeCanvasItem *item, int flags )
{
ECanvasVbox *e_canvas_vbox = E_CANVAS_VBOX(item);
if ( GTK_OBJECT_FLAGS( e_canvas_vbox ) & GNOME_CANVAS_ITEM_REALIZED ) {
gdouble old_height;
gdouble running_height;
old_height = e_canvas_vbox->height;
running_height = 0;
if (e_canvas_vbox->items == NULL) {
} else {
GList *list;
gdouble item_height;
list = e_canvas_vbox->items;
gtk_object_get (GTK_OBJECT(list->data),
"height", &item_height,
NULL);
e_canvas_item_move_absolute(GNOME_CANVAS_ITEM(list->data),
(double) 0,
(double) running_height);
running_height += item_height;
list = g_list_next(list);
for( ; list; list = g_list_next(list)) {
running_height += e_canvas_vbox->spacing;
gtk_object_get (GTK_OBJECT(list->data),
"height", &item_height,
NULL);
e_canvas_item_move_absolute(GNOME_CANVAS_ITEM(list->data),
(double) 0,
(double) running_height);
running_height += item_height;
}
}
e_canvas_vbox->height = running_height;
if (old_height != e_canvas_vbox->height)
e_canvas_item_request_parent_reflow(item);
}
}
void
e_canvas_vbox_add_item(ECanvasVbox *e_canvas_vbox, GnomeCanvasItem *item)
{
if (E_CANVAS_VBOX_CLASS(GTK_OBJECT(e_canvas_vbox)->klass)->add_item)
(E_CANVAS_VBOX_CLASS(GTK_OBJECT(e_canvas_vbox)->klass)->add_item) (e_canvas_vbox, item);
}
