path: root/e-util/e-dialog-widgets.c

/* Evolution internal utilities - Glade dialog widget utilities
 *
 * Copyright (C) 2000 Helix Code, Inc.
 *
 * Author: Federico Mena-Quintero <federico@gimp.org>
 *
 * 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.
 */

#include <config.h>
#include <gtk/gtkmenu.h>
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkoptionmenu.h>
#include <gtk/gtkradiobutton.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkspinbutton.h>
#include "e-dialog-widgets.h"



typedef struct {
    /* Widgets that are hooked */
    GSList *widgets;
} DialogHooks;



/* Destroy handler for the dialog; frees the dialog hooks */
static void
dialog_destroy_cb (GtkObject *dialog, gpointer data)
{
    DialogHooks *hooks;

    hooks = data;

    g_slist_free (hooks->widgets);
    hooks->widgets = NULL;

    g_free (hooks);
    gtk_object_set_data (dialog, "dialog-hooks", NULL);
}

/* Ensures that the dialog has the necessary attached data to store the widget
 * hook information.
 */
static DialogHooks *
get_dialog_hooks (GtkWidget *dialog)
{
    DialogHooks *hooks;

    hooks = gtk_object_get_data (GTK_OBJECT (dialog), "dialog-hooks");
    if (!hooks) {
        hooks = g_new0 (DialogHooks, 1);
        gtk_object_set_data (GTK_OBJECT (dialog), "dialog-hooks", hooks);
        gtk_signal_connect (GTK_OBJECT (dialog), "destroy",
                    GTK_SIGNAL_FUNC (dialog_destroy_cb), hooks);
    }

    return hooks;
}

/* Converts an mapped value to the appropriate index in an item group.  The
 * values for the items are provided as a -1-terminated array.
 */
static int
value_to_index (const int *value_map, int value)
{
    int i;

    for (i = 0; value_map[i] != -1; i++)
        if (value_map[i] == value)
            return i;

    return -1;
}

/* Converts an index in an item group to the appropriate mapped value.  See the
 * function above.
 */
static int
index_to_value (const int *value_map, int index)
{
    int i;

    /* We do this the hard way, i.e. not as a simple array reference, to
     * check for correctness.
     */

    for (i = 0; value_map[i] != -1; i++)
        if (i == index)
            return value_map[i];

    return -1;
}

/* Callback for the "toggled" signal of toggle buttons */
static void
toggled_cb (GtkToggleButton *toggle, gpointer data)
{
    GnomePropertyBox *pbox;

    pbox = GNOME_PROPERTY_BOX (data);

    /* For radio buttons, we only notify the property box if the button is
     * active, because we'll get one call for each of the changed buttons in
     * the radio group.
     */
    if (!GTK_IS_RADIO_BUTTON (toggle) || toggle->active)
        gnome_property_box_changed (pbox);
}

/* Hooks a radio button group */
static void
hook_radio (GtkWidget *dialog, GtkRadioButton *radio, gpointer value_var, gpointer info)
{
    GSList *group;
    int *value;
    int i;
    const int *value_map;
    GSList *l;

    group = gtk_radio_button_group (radio);

    /* Set the value */

    value = (int *) value_var;
    value_map = (const int *) info;

    i = value_to_index (value_map, *value);
    if (i != -1) {
        l = g_slist_nth (group, i);
        if (!l)
            g_message ("hook_radio(): could not find index %d in radio group!", i);

        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (l->data), TRUE);
    } else
        g_message ("hook_radio(): could not find value %d in value map!", *value);

    /* Hook to changed */

    if (GNOME_IS_PROPERTY_BOX (dialog))
        for (l = group; l; l = l->next)
            gtk_signal_connect (GTK_OBJECT (l->data), "toggled",
                        GTK_SIGNAL_FUNC (toggled_cb), dialog);
}

/* Callback for the "activate" signal of menu items */
static void
activate_cb (GtkMenuItem *item, gpointer data)
{
    GnomePropertyBox *pbox;

    pbox = GNOME_PROPERTY_BOX (data);
    gnome_property_box_changed (pbox);
}

/* Hooks an option menu */
static void
hook_option_menu (GtkWidget *dialog, GtkOptionMenu *omenu, gpointer value_var, gpointer info)
{
    int *value;
    int i;
    const int *value_map;

    /* Set the value */

    value = (int *) value_var;
    value_map = (const int *) info;

    i = value_to_index (value_map, *value);
    if (i != -1)
        gtk_option_menu_set_history (omenu, i);
    else
        g_message ("hook_option_menu(): could not find value %d in value map!", *value);

    /* Hook to changed */

    if (GNOME_IS_PROPERTY_BOX (dialog)) {
        GtkMenu *menu;
        GList *l;

        menu = GTK_MENU (gtk_option_menu_get_menu (omenu));

        for (l = GTK_MENU_SHELL (menu)->children; l; l = l->next)
            gtk_signal_connect (GTK_OBJECT (l->data), "activate",
                        GTK_SIGNAL_FUNC (activate_cb), dialog);
    }
}

/* Hooks a toggle button */
static void
hook_toggle (GtkWidget *dialog, GtkToggleButton *toggle, gpointer value_var, gpointer info)
{
    gboolean *value;

    /* Set the value */

    value = (gboolean *) value_var;
    gtk_toggle_button_set_active (toggle, *value);

    /* Hook to changed */

    if (GNOME_IS_PROPERTY_BOX (dialog))
        gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
                    GTK_SIGNAL_FUNC (toggled_cb), dialog);
}

/* Callback for the "value_changed" signal of the adjustment of a spin button */
static void
value_changed_cb (GtkAdjustment *adj, gpointer data)
{
    GnomePropertyBox *pbox;

    pbox = GNOME_PROPERTY_BOX (data);
    gnome_property_box_changed (pbox);
}

/* Hooks a spin button */
static void
hook_spin_button (GtkWidget *dialog, GtkSpinButton *spin, gpointer value_var, gpointer info)
{
    double *value;
    GtkAdjustment *adj;

    /* Set the value */

    value = (double *) value_var;
    adj = gtk_spin_button_get_adjustment (spin);

    adj->value = *value;
    gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");

    /* Hook to changed */

    if (GNOME_IS_PROPERTY_BOX (dialog))
        gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
                    GTK_SIGNAL_FUNC (value_changed_cb), dialog);
}

/* Hooks an entry widget */
static void
hook_entry (GtkWidget *dialog, GtkEntry *entry, gpointer value_var, gpointer info)
{
}

gboolean
e_dialog_widget_hook_value (GtkWidget *dialog, GtkWidget *widget,
                gpointer value_var, gpointer info)
{
    DialogHooks *hooks;

    g_return_val_if_fail (dialog != NULL, FALSE);
    g_return_val_if_fail (widget != NULL, FALSE);
    g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
    g_return_val_if_fail (value_var != NULL, FALSE);

    hooks = get_dialog_hooks (dialog);

    /* First check if it is a "group" widget, like a radio button or an
     * option menu.  Then we check for normal ungrouped widgets.
     */

    if (GTK_IS_RADIO_BUTTON (widget))
        hook_radio (dialog, GTK_RADIO_BUTTON (widget), value_var, info);
    else if (GTK_IS_OPTION_MENU (widget))
        hook_option_menu (dialog, GTK_OPTION_MENU (widget), value_var, info);
    else if (GTK_IS_TOGGLE_BUTTON (widget))
        hook_toggle (dialog, GTK_TOGGLE_BUTTON (widget), value_var, info);
    else if (GTK_IS_SPIN_BUTTON (widget))
        hook_spin_button (dialog, GTK_SPIN_BUTTON (widget), value_var, info);
    else if (GTK_IS_ENTRY (widget))
        hook_entry (dialog, GTK_ENTRY (widget), value_var, info);
    else
        return FALSE;

    hooks->widgets = g_slist_prepend (hooks->widgets, widget);

    return TRUE;
}