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

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* 
 * e-search-bar.c
 *
 * Copyright (C) 2000, 2001 Ximian, Inc.
 *
 * Authors:
 *  Chris Lahey <clahey@ximian.com>
 *  Ettore Perazzoli <ettore@ximian.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 "e-search-bar.h"
#include "e-dropdown-button.h"

#include <gal/widgets/e-unicode.h>
#include <gal/widgets/e-gui-utils.h>


enum {
    QUERY_CHANGED,
    MENU_ACTIVATED,

    LAST_SIGNAL
};

static gint esb_signals [LAST_SIGNAL] = { 0, };

static GtkHBoxClass *parent_class = NULL;

/* The arguments we take */
enum {
    ARG_0,
    ARG_OPTION_CHOICE,
    ARG_TEXT,
};


/* Signals.  */

static void
emit_query_changed (ESearchBar *esb)
{
    gtk_signal_emit(GTK_OBJECT (esb),
            esb_signals [QUERY_CHANGED]);
}

static void
emit_menu_activated (ESearchBar *esb, int item)
{
    gtk_signal_emit(GTK_OBJECT (esb),
            esb_signals [MENU_ACTIVATED],
            item);
}


/* Callbacks.  */

static void
menubar_activated_cb (GtkWidget *widget, ESearchBar *esb)
{
    int id;

    id = GPOINTER_TO_INT(gtk_object_get_data (GTK_OBJECT (widget), "EsbMenuId"));

    emit_menu_activated(esb, id);
}

static void
option_activated_cb (GtkWidget *widget,
             ESearchBar *esb)
{
    int id;

    id = GPOINTER_TO_INT (gtk_object_get_data (GTK_OBJECT (widget), "EsbChoiceId"));

    esb->option_choice = id;
    emit_query_changed (esb);
}

static void
entry_activated_cb (GtkWidget *widget,
             ESearchBar *esb)
{
    emit_query_changed (esb);
}


/* Widgetry creation.  */

static void
add_dropdown (ESearchBar *esb,
          ESearchBarItem *items)
{
    GtkWidget *menu;
    GtkWidget *event_box;
    int i;

    menu = gtk_menu_new ();
    for (i = 0; items[i].id != -1; i++) {
        GtkWidget *item;

        if (items[i].text)
            item = gtk_menu_item_new_with_label (_(items[i].text));
        else
            item = gtk_menu_item_new();

        gtk_menu_append (GTK_MENU (menu), item);

        gtk_object_set_data (GTK_OBJECT (item), "EsbMenuId", GINT_TO_POINTER(items[i].id));

        gtk_signal_connect (GTK_OBJECT (item), "activate",
                    GTK_SIGNAL_FUNC (menubar_activated_cb),
                    esb);
    }
    gtk_widget_show_all (menu);

    esb->dropdown = e_dropdown_button_new (_("Sear_ch"), GTK_MENU (menu));
    GTK_WIDGET_UNSET_FLAGS (esb->dropdown, GTK_CAN_FOCUS);
    gtk_widget_show (esb->dropdown);

    /* So, GtkOptionMenu is stupid; it adds a 1-pixel-wide empty border
           around the button for no reason.  So we add a 1-pixel-wide border
           around the button as well, by using an event box.  */
    event_box = gtk_event_box_new ();
    gtk_container_set_border_width (GTK_CONTAINER (event_box), 1);
    gtk_container_add (GTK_CONTAINER (event_box), esb->dropdown);
    gtk_widget_show (event_box);

    gtk_box_pack_start(GTK_BOX(esb), event_box, FALSE, FALSE, 0);
}

static void
add_option(ESearchBar *esb, ESearchBarItem *items)
{
    GtkWidget *menu;
    GtkRequisition dropdown_requisition;
    GtkRequisition option_requisition;
    int i;

    esb->option = gtk_option_menu_new();
    gtk_widget_show(esb->option);
    gtk_box_pack_start(GTK_BOX(esb), esb->option, FALSE, FALSE, 0);

    menu = gtk_menu_new ();
    for (i = 0; items[i].id != -1; i++) {
        GtkWidget *item;

        if (items[i].text)
            item = gtk_menu_item_new_with_label (_(items[i].text));
        else
            item = gtk_menu_item_new();

        gtk_menu_append (GTK_MENU (menu), item);

        gtk_object_set_data (GTK_OBJECT (item), "EsbChoiceId", GINT_TO_POINTER(items[i].id));

        gtk_signal_connect (GTK_OBJECT (item), "activate",
                    GTK_SIGNAL_FUNC (option_activated_cb),
                    esb);
    }
    gtk_widget_show_all (menu);

    gtk_option_menu_set_menu (GTK_OPTION_MENU (esb->option), menu);
    gtk_option_menu_set_history (GTK_OPTION_MENU (esb->option), 0);

    gtk_widget_set_sensitive (esb->option, TRUE);

    /* Set the minimum height of this widget to that of the dropdown
           button, for a better look.  */
    g_assert (esb->dropdown != NULL);

    gtk_widget_size_request (esb->dropdown, &dropdown_requisition);
    gtk_widget_size_request (esb->option, &option_requisition);

    gtk_container_set_border_width (GTK_CONTAINER (esb->dropdown), GTK_CONTAINER (esb->option)->border_width);
}

static void
add_entry (ESearchBar *esb)
{
    esb->entry = gtk_entry_new();
    gtk_signal_connect (GTK_OBJECT (esb->entry), "activate",
                GTK_SIGNAL_FUNC (entry_activated_cb), esb);
    gtk_widget_show(esb->entry);
    gtk_box_pack_start(GTK_BOX(esb), esb->entry, TRUE, TRUE, 0);
}

static void
add_spacer (ESearchBar *esb)
{
    GtkWidget *spacer;

    spacer = gtk_drawing_area_new();
    gtk_widget_show(spacer);
    gtk_box_pack_start(GTK_BOX(esb), spacer, FALSE, FALSE, 0);

    gtk_widget_set_usize(spacer, 19, 1);
}


/* GtkObject methods.  */

static void
impl_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
    ESearchBar *esb = E_SEARCH_BAR(object);

    switch (arg_id) {
    case ARG_OPTION_CHOICE:
        GTK_VALUE_ENUM (*arg) = esb->option_choice;
        break;

    case ARG_TEXT:
        GTK_VALUE_STRING (*arg) = e_utf8_gtk_editable_get_text(GTK_EDITABLE(esb->entry));
        break;

    default:
        arg->type = GTK_TYPE_INVALID;
        break;
    }
}

static void
impl_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
    ESearchBar *esb = E_SEARCH_BAR(object);

    switch (arg_id) {
    case ARG_OPTION_CHOICE:
        esb->option_choice = GTK_VALUE_ENUM (*arg);
        gtk_option_menu_set_history (GTK_OPTION_MENU (esb->option), esb->option_choice);
        emit_query_changed (esb);
        break;

    case ARG_TEXT:
        e_utf8_gtk_editable_set_text(GTK_EDITABLE(esb->entry), GTK_VALUE_STRING (*arg));
        emit_query_changed (esb);
        break;

    default:
        break;
    }
}

static void
impl_destroy (GtkObject *object)
{
    if (GTK_OBJECT_CLASS(parent_class)->destroy)
        GTK_OBJECT_CLASS(parent_class)->destroy (object);
}


static void
class_init (ESearchBarClass *klass)
{
    GtkObjectClass *object_class;

    object_class = GTK_OBJECT_CLASS(klass);

    parent_class = gtk_type_class (gtk_hbox_get_type ());

    object_class->set_arg = impl_set_arg;
    object_class->get_arg = impl_get_arg;
    object_class->destroy = impl_destroy;

    gtk_object_add_arg_type ("ESearchBar::option_choice", GTK_TYPE_ENUM,
                 GTK_ARG_READWRITE, ARG_OPTION_CHOICE);
    gtk_object_add_arg_type ("ESearchBar::text", GTK_TYPE_STRING,
                 GTK_ARG_READWRITE, ARG_TEXT);

    esb_signals [QUERY_CHANGED] =
        gtk_signal_new ("query_changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ESearchBarClass, query_changed),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    esb_signals [MENU_ACTIVATED] =
        gtk_signal_new ("menu_activated",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ESearchBarClass, menu_activated),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1, GTK_TYPE_INT);

    gtk_object_class_add_signals (object_class, esb_signals, LAST_SIGNAL);
}

static void
init (ESearchBar *esb)
{
    esb->dropdown      = NULL;
    esb->option        = NULL;
    esb->entry         = NULL;

    esb->option_choice = 0;
}


/* Object construction.  */

void
e_search_bar_construct (ESearchBar *search_bar,
            ESearchBarItem *menu_items,
            ESearchBarItem *option_items)
{
    g_return_if_fail (search_bar != NULL);
    g_return_if_fail (E_IS_SEARCH_BAR (search_bar));
    g_return_if_fail (menu_items != NULL);
    g_return_if_fail (option_items != NULL);
    
    gtk_box_set_spacing (GTK_BOX (search_bar), 1);

    add_dropdown (search_bar, menu_items);

    add_option (search_bar, option_items);

    add_entry (search_bar);

    add_spacer (search_bar);
}

GtkWidget *
e_search_bar_new (ESearchBarItem *menu_items,
          ESearchBarItem *option_items)
{
    GtkWidget *widget;

    g_return_val_if_fail (menu_items != NULL, NULL);
    g_return_val_if_fail (option_items != NULL, NULL);
    
    widget = GTK_WIDGET (gtk_type_new (e_search_bar_get_type ()));

    e_search_bar_construct (E_SEARCH_BAR (widget), menu_items, option_items);

    return widget;
}

GtkType
e_search_bar_get_type (void)
{
    static GtkType type = 0;

    if (!type) {
        static const GtkTypeInfo info = {
            "ESearchBar",
            sizeof (ESearchBar),
            sizeof (ESearchBarClass),
            (GtkClassInitFunc) class_init,
            (GtkObjectInitFunc) init,
            /* reserved_1 */ NULL,
                /* reserved_2 */ NULL,
            (GtkClassInitFunc) NULL,
        };
        
        type = gtk_type_unique (gtk_hbox_get_type (), &info);
    }

    return type;
}