path: root/widgets/misc/e-task-bar.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-task-bar.c
 *
 * Copyright (C) 2001  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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.
 *
 * Author: Ettore Perazzoli <ettore@ximian.com>
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-task-bar.h"

#include <gtk/gtklabel.h>
#include <gtk/gtkmisc.h>

struct _ETaskBarPrivate
{
    GtkWidget *message_label;
    GtkHBox  *hbox;
};

/* WARNING: Ugly hack starts here.  */
#define MAX_ACTIVITIES_PER_COMPONENT 2

G_DEFINE_TYPE (ETaskBar, e_task_bar, GTK_TYPE_HBOX)

static void
reduce_displayed_activities_per_component (ETaskBar *task_bar)
{
    GHashTable *component_ids_hash;
    GtkBox *box;
    GList *p;

    component_ids_hash = g_hash_table_new (g_str_hash, g_str_equal);

    box = GTK_BOX (task_bar->priv->hbox);

    for (p = box->children; p != NULL; p = p->next) {
        GtkBoxChild *child;
        const char *component_id;
        void *hash_item;

        child = (GtkBoxChild *) p->data;
        component_id = e_task_widget_get_component_id (E_TASK_WIDGET (child->widget));

        hash_item = g_hash_table_lookup (component_ids_hash, component_id);

        if (hash_item == NULL) {
            gtk_widget_show (child->widget);
            g_hash_table_insert (component_ids_hash, (void *) component_id, GINT_TO_POINTER (1));
        } else {
            int num_items;

            num_items = GPOINTER_TO_INT (hash_item);
            g_assert (num_items <= MAX_ACTIVITIES_PER_COMPONENT);

            if (num_items == MAX_ACTIVITIES_PER_COMPONENT) {
                gtk_widget_hide (child->widget);
            } else {
                num_items ++;
                gtk_widget_show (child->widget);
                g_hash_table_insert (component_ids_hash, (void *) component_id, GINT_TO_POINTER (num_items));
            }
        }
    }

    g_hash_table_destroy (component_ids_hash);
}


static void
e_task_bar_class_init (ETaskBarClass *klass)
{
}

static void
e_task_bar_init (ETaskBar *task_bar)
{
    GtkWidget *label, *hbox;
    
    task_bar->priv = g_new (ETaskBarPrivate, 1);

    gtk_box_set_spacing (GTK_BOX (task_bar), 10);

    label = gtk_label_new (NULL);
    gtk_label_set_ellipsize (GTK_LABEL (label), PANGO_ELLIPSIZE_END);
    gtk_box_pack_start (GTK_BOX (task_bar), label, TRUE, TRUE, 0);
    gtk_misc_set_alignment (GTK_MISC (label), 0, 0.5); 
    task_bar->priv->message_label = label;

    hbox = gtk_hbox_new (FALSE, 0);
    gtk_container_add (GTK_CONTAINER (task_bar), hbox);
    task_bar->priv->hbox = GTK_HBOX (hbox);
}


void
e_task_bar_construct (ETaskBar *task_bar)
{
    g_return_if_fail (task_bar != NULL);
    g_return_if_fail (E_IS_TASK_BAR (task_bar));

    /* Nothing to do here.  */
}

GtkWidget *
e_task_bar_new (void)
{
    ETaskBar *task_bar;

    task_bar = g_object_new (e_task_bar_get_type (), NULL);
    e_task_bar_construct (task_bar);

    return GTK_WIDGET (task_bar);
}

void
e_task_bar_set_message (ETaskBar   *task_bar,
            const char *message)
{
    if (message) {
        gtk_label_set_text (
            GTK_LABEL (task_bar->priv->message_label), message);
        gtk_widget_show (task_bar->priv->message_label);
    } else {
        e_task_bar_unset_message (task_bar);
    }
}

void
e_task_bar_unset_message (ETaskBar   *task_bar)
{
    gtk_widget_hide (task_bar->priv->message_label);
}

void
e_task_bar_prepend_task (ETaskBar *task_bar,
             ETaskWidget *task_widget)
{
    GtkBoxChild *child_info;
    GtkBox *box;

    g_return_if_fail (task_bar != NULL);
    g_return_if_fail (E_IS_TASK_BAR (task_bar));
    g_return_if_fail (task_widget != NULL);
    g_return_if_fail (E_IS_TASK_WIDGET (task_widget));

    /* Hah hah.  GTK+ sucks.  This is adapted from `gtkhbox.c'.  */

    child_info = g_new (GtkBoxChild, 1);
    child_info->widget = GTK_WIDGET (task_widget);
    child_info->padding = 0;
    child_info->expand = TRUE;
    child_info->fill = TRUE;
    child_info->pack = GTK_PACK_START;

    box = GTK_BOX (task_bar->priv->hbox);

    box->children = g_list_prepend (box->children, child_info);

    gtk_widget_set_parent (GTK_WIDGET (task_widget), GTK_WIDGET (task_bar->priv->hbox));

    if (GTK_WIDGET_REALIZED (task_bar))
        gtk_widget_realize (GTK_WIDGET (task_widget));

    if (GTK_WIDGET_VISIBLE (task_bar) && GTK_WIDGET_VISIBLE (task_widget)) {
        if (GTK_WIDGET_MAPPED (task_bar))
            gtk_widget_map (GTK_WIDGET (task_widget));
        gtk_widget_queue_resize (GTK_WIDGET (task_widget));
    }

    reduce_displayed_activities_per_component (task_bar);

    gtk_widget_show (GTK_WIDGET (task_bar->priv->hbox));
}

void
e_task_bar_remove_task (ETaskBar *task_bar,
            int n)
{
    ETaskWidget *task_widget;

    g_return_if_fail (task_bar != NULL);
    g_return_if_fail (E_IS_TASK_BAR (task_bar));
    g_return_if_fail (n >= 0);

    task_widget = e_task_bar_get_task_widget (task_bar, n);
    gtk_widget_destroy (GTK_WIDGET (task_widget));

    reduce_displayed_activities_per_component (task_bar);

    if (g_list_length (GTK_BOX (task_bar->priv->hbox)->children) == 0)
        gtk_widget_hide (GTK_WIDGET (task_bar->priv->hbox));
}
    
ETaskWidget *
e_task_bar_get_task_widget (ETaskBar *task_bar,
                int n)
{
    GtkBoxChild *child_info;

    g_return_val_if_fail (task_bar != NULL, NULL);
    g_return_val_if_fail (E_IS_TASK_BAR (task_bar), NULL);

    child_info = (GtkBoxChild *) g_list_nth (GTK_BOX (task_bar->priv->hbox)->children, n)->data;

    return E_TASK_WIDGET (child_info->widget);
}