path: root/widgets/misc/e-paned.c

/*
 * e-paned.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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-paned.h"

#include <config.h>
#include <glib/gi18n-lib.h>

#define E_PANED_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_PANED, EPanedPrivate))

struct _EPanedPrivate {
    gint hposition;
    gint vposition;

    guint sync_position : 1;
};

enum {
    PROP_0,
    PROP_HPOSITION,
    PROP_VPOSITION
};

static gpointer parent_class;

static void
paned_notify_orientation_cb (EPaned *paned)
{
    /* Ignore the next "notify::position" emission. */
    paned->priv->sync_position = TRUE;
    gtk_widget_queue_resize (GTK_WIDGET (paned));
}

static void
paned_notify_position_cb (EPaned *paned)
{
    GtkAllocation *allocation;
    GtkOrientable *orientable;
    GtkOrientation orientation;
    gint position;

    if (paned->priv->sync_position)
        return;

    orientable = GTK_ORIENTABLE (paned);
    orientation = gtk_orientable_get_orientation (orientable);

    allocation = &GTK_WIDGET (paned)->allocation;
    position = gtk_paned_get_position (GTK_PANED (paned));

    if (orientation == GTK_ORIENTATION_HORIZONTAL) {
        position = MAX (0, allocation->width - position);
        e_paned_set_hposition (paned, position);
    } else {
        position = MAX (0, allocation->height - position);
        e_paned_set_vposition (paned, position);
    }
}

static void
paned_set_property (GObject *object,
                    guint property_id,
                    const GValue *value,
                    GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_HPOSITION:
            e_paned_set_hposition (
                E_PANED (object),
                g_value_get_int (value));
            return;

        case PROP_VPOSITION:
            e_paned_set_vposition (
                E_PANED (object),
                g_value_get_int (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
paned_get_property (GObject *object,
                    guint property_id,
                    GValue *value,
                    GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_HPOSITION:
            g_value_set_int (
                value, e_paned_get_hposition (
                E_PANED (object)));
            return;

        case PROP_VPOSITION:
            g_value_set_int (
                value, e_paned_get_vposition (
                E_PANED (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
paned_size_allocate (GtkWidget *widget,
                     GtkAllocation *allocation)
{
    EPaned *paned = E_PANED (widget);
    GtkOrientable *orientable;
    GtkOrientation orientation;
    gint allocated;
    gint position;

    /* Chain up to parent's size_allocate() method. */
    GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);

    if (!paned->priv->sync_position)
        return;

    orientable = GTK_ORIENTABLE (paned);
    orientation = gtk_orientable_get_orientation (orientable);

    if (orientation == GTK_ORIENTATION_HORIZONTAL) {
        allocated = allocation->width;
        position = e_paned_get_hposition (paned);
    } else {
        allocated = allocation->height;
        position = e_paned_get_vposition (paned);
    }

    position = MAX (0, allocated - position);
    gtk_paned_set_position (GTK_PANED (paned), position);

    paned->priv->sync_position = FALSE;
}

static void
paned_class_init (EPanedClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EPanedPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = paned_set_property;
    object_class->get_property = paned_get_property;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->size_allocate = paned_size_allocate;

    g_object_class_install_property (
        object_class,
        PROP_HPOSITION,
        g_param_spec_int (
            "hposition",
            _("Horizontal Position"),
            _("Pane position when oriented horizontally"),
            G_MININT,
            G_MAXINT,
            0,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_VPOSITION,
        g_param_spec_int (
            "vposition",
            _("Vertical Position"),
            _("Pane position when oriented vertically"),
            G_MININT,
            G_MAXINT,
            0,
            G_PARAM_READWRITE));
}

static void
paned_init (EPaned *paned)
{
    paned->priv = E_PANED_GET_PRIVATE (paned);

    g_signal_connect (
        paned, "notify::orientation",
        G_CALLBACK (paned_notify_orientation_cb), NULL);

    g_signal_connect (
        paned, "notify::position",
        G_CALLBACK (paned_notify_position_cb), NULL);
}

GType
e_paned_get_type (void)
{
    static GType type = 0;

    if (G_UNLIKELY (type == 0)) {
        static const GTypeInfo type_info = {
            sizeof (EPanedClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) paned_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,  /* class_data */
            sizeof (EPaned),
            0,     /* n_preallocs */
            (GInstanceInitFunc) paned_init,
            NULL   /* value_table */
        };

        type = g_type_register_static (
            GTK_TYPE_PANED, "EPaned", &type_info, 0);
    }

    return type;
}

GtkWidget *
e_paned_new (GtkOrientation orientation)
{
    return g_object_new (E_TYPE_PANED, "orientation", orientation, NULL);
}

gint
e_paned_get_hposition (EPaned *paned)
{
    g_return_val_if_fail (E_IS_PANED (paned), 0);

    return paned->priv->hposition;
}

void
e_paned_set_hposition (EPaned *paned,
                       gint hposition)
{
    GtkOrientable *orientable;
    GtkOrientation orientation;

    g_return_if_fail (E_IS_PANED (paned));

    if (hposition == paned->priv->hposition)
        return;

    paned->priv->hposition = hposition;

    g_object_notify (G_OBJECT (paned), "hposition");

    orientable = GTK_ORIENTABLE (paned);
    orientation = gtk_orientable_get_orientation (orientable);

    if (orientation == GTK_ORIENTATION_HORIZONTAL) {
        paned->priv->sync_position = TRUE;
        gtk_widget_queue_resize (GTK_WIDGET (paned));
    }
}

gint
e_paned_get_vposition (EPaned *paned)
{
    g_return_val_if_fail (E_IS_PANED (paned), 0);

    return paned->priv->vposition;
}

void
e_paned_set_vposition (EPaned *paned,
                       gint vposition)
{
    GtkOrientable *orientable;
    GtkOrientation orientation;

    g_return_if_fail (E_IS_PANED (paned));

    if (vposition == paned->priv->vposition)
        return;

    paned->priv->vposition = vposition;

    g_object_notify (G_OBJECT (paned), "vposition");

    orientable = GTK_ORIENTABLE (paned);
    orientation = gtk_orientable_get_orientation (orientable);

    if (orientation == GTK_ORIENTATION_VERTICAL) {
        paned->priv->sync_position = TRUE;
        gtk_widget_queue_resize (GTK_WIDGET (paned));
    }
}