path: root/widgets/misc/e-gui-utils.c

/*
 * 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:
 *      Miguel de Icaza <miguel@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gtk/gtk.h>
#include <libgnomecanvas/gnome-canvas-pixbuf.h>

#include "e-gui-utils.h"

void
e_auto_kill_popup_menu_on_selection_done (GtkMenu *menu)
{
    g_return_if_fail (GTK_IS_MENU (menu));

    g_signal_connect (menu, "selection_done", G_CALLBACK (gtk_widget_destroy), menu);
}

void
e_popup_menu (GtkMenu *menu, GdkEvent *event)
{
    g_return_if_fail (GTK_IS_MENU (menu));

    e_auto_kill_popup_menu_on_selection_done (menu);

    if (event) {
        if (event->type == GDK_KEY_PRESS)
            gtk_menu_popup (menu, NULL, NULL, NULL, NULL, 0,
                    event->key.time);
        else if ((event->type == GDK_BUTTON_PRESS) ||
             (event->type == GDK_BUTTON_RELEASE) ||
             (event->type == GDK_2BUTTON_PRESS) ||
             (event->type == GDK_3BUTTON_PRESS)){
            gtk_menu_popup (menu, NULL, NULL, NULL, NULL,
                    event->button.button,
                    event->button.time);
        }
    } else
        gtk_menu_popup (menu, NULL, NULL, NULL, NULL, 0,
                GDK_CURRENT_TIME);
}

typedef struct {
    GtkCallback callback;
    gpointer closure;
} CallbackClosure;

static void
e_container_foreach_leaf_callback(GtkWidget *widget, CallbackClosure *callback_closure)
{
    if (GTK_IS_CONTAINER(widget)) {
        e_container_foreach_leaf(GTK_CONTAINER(widget), callback_closure->callback, callback_closure->closure);
    } else {
        (*callback_closure->callback) (widget, callback_closure->closure);
    }
}

void
e_container_foreach_leaf(GtkContainer *container,
             GtkCallback callback,
             gpointer closure)
{
    CallbackClosure callback_closure;
    callback_closure.callback = callback;
    callback_closure.closure = closure;
    gtk_container_foreach(container, (GtkCallback) e_container_foreach_leaf_callback, &callback_closure);
}

static void
e_container_change_tab_order_destroy_notify(gpointer data)
{
    GList *list = data;
    g_list_foreach(list, (GFunc) g_object_unref, NULL);
    g_list_free(list);
}

static gint
e_container_change_tab_order_callback(GtkContainer *container,
                      GtkDirectionType direction,
                      GList *children)
{
    GtkWidget *focus_child;
    GtkWidget *child;

    if (direction != GTK_DIR_TAB_FORWARD &&
        direction != GTK_DIR_TAB_BACKWARD)
        return FALSE;

    focus_child = container->focus_child;

    if (focus_child == NULL)
        return FALSE;

    if (direction == GTK_DIR_TAB_BACKWARD) {
        children = g_list_last(children);
    }

    while (children) {
        child = children->data;
        if (direction == GTK_DIR_TAB_FORWARD)
            children = children->next;
        else
            children = children->prev;

        if (!child)
            continue;

        if (focus_child) {
            if (focus_child == child) {
                focus_child = NULL;

                if (GTK_WIDGET_DRAWABLE (child) &&
                    GTK_IS_CONTAINER (child) &&
                    !GTK_WIDGET_HAS_FOCUS (child))
                    if (gtk_widget_child_focus (GTK_WIDGET (child), direction)) {
                        g_signal_stop_emission_by_name (container, "focus");
                        return TRUE;
                    }
            }
        }
        else if (GTK_WIDGET_DRAWABLE (child)) {
            if (GTK_IS_CONTAINER (child)) {
                if (gtk_widget_child_focus (GTK_WIDGET (child), direction)) {
                    g_signal_stop_emission_by_name (container, "focus");
                    return TRUE;
                }
            }
            else if (GTK_WIDGET_CAN_FOCUS (child)) {
                gtk_widget_grab_focus (child);
                g_signal_stop_emission_by_name (container, "focus");
                return TRUE;
            }
        }
    }

    return FALSE;
}

gint
e_container_change_tab_order(GtkContainer *container, GList *widgets)
{
    GList *list;
    list = g_list_copy(widgets);
    g_list_foreach(list, (GFunc) g_object_ref, NULL);
    return g_signal_connect_data (container, "focus",
                      G_CALLBACK(e_container_change_tab_order_callback),
                      list,
                      (GClosureNotify) e_container_change_tab_order_destroy_notify,
                      0);
}

struct widgetandint {
    GtkWidget *widget;
    gint count;
};

static void
nth_entry_callback(GtkWidget *widget, struct widgetandint *data)
{
    if (GTK_IS_ENTRY(widget)) {
        if (data->count > 1) {
            data->count --;
            data->widget = widget;
        } else if (data->count == 1) {
            data->count --;
            data->widget = NULL;
            gtk_widget_grab_focus(widget);
        }
    }
}

void
e_container_focus_nth_entry(GtkContainer *container, gint n)
{
    struct widgetandint data;
    data.widget = NULL;
    data.count = n;
    e_container_foreach_leaf(container, (GtkCallback) nth_entry_callback, &data);
    if (data.widget)
        gtk_widget_grab_focus(data.widget);
}

gboolean
e_glade_xml_connect_widget (GladeXML *gui, gchar *name, gchar *signal, GCallback cb, gpointer closure)
{
    GtkWidget *widget;

    widget = glade_xml_get_widget (gui, name);

    if (widget) {
        g_signal_connect (widget, signal,
                  cb, closure);
        return TRUE;
    }

    return FALSE;
}

gboolean
e_glade_xml_set_sensitive (GladeXML *gui, gchar *name, gboolean sensitive)
{
    GtkWidget *widget;

    widget = glade_xml_get_widget (gui, name);

    if (widget) {
        gtk_widget_set_sensitive (widget, sensitive);
        return TRUE;
    }

    return FALSE;
}