path: root/lib/widgets/nautilus-floating-bar.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/* Nautilus - Floating status bar.
 *
 * Copyright (C) 2011 Red Hat Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library 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.
 *
 * Authors: Cosimo Cecchi <cosimoc@redhat.com>
 *
 */

#include <config.h>

#include "nautilus-floating-bar.h"

struct _NautilusFloatingBarDetails {
    gchar *label;

    GtkWidget *label_widget;
    GtkWidget *spinner;
    gboolean show_spinner;
    gboolean is_interactive;
};

enum {
    PROP_LABEL = 1,
    PROP_SHOW_SPINNER,
    NUM_PROPERTIES
};

enum {
    ACTION,
    NUM_SIGNALS
};

static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };
static guint signals[NUM_SIGNALS] = { 0, };

G_DEFINE_TYPE (NautilusFloatingBar, nautilus_floating_bar,
               GTK_TYPE_BOX);

static void
action_button_clicked_cb (GtkButton *button,
              NautilusFloatingBar *self)
{
    gint action_id;

    action_id = GPOINTER_TO_INT
        (g_object_get_data (G_OBJECT (button), "action-id"));
    
    g_signal_emit (self, signals[ACTION], 0, action_id);
}

static void
nautilus_floating_bar_finalize (GObject *obj)
{
    NautilusFloatingBar *self = NAUTILUS_FLOATING_BAR (obj);

    g_free (self->priv->label);

    G_OBJECT_CLASS (nautilus_floating_bar_parent_class)->finalize (obj);
}

static void
nautilus_floating_bar_get_property (GObject *object,
                    guint property_id,
                    GValue *value,
                    GParamSpec *pspec)
{
    NautilusFloatingBar *self = NAUTILUS_FLOATING_BAR (object);

    switch (property_id) {
    case PROP_LABEL:
        g_value_set_string (value, self->priv->label);
        break;
    case PROP_SHOW_SPINNER:
        g_value_set_boolean (value, self->priv->show_spinner);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
        break;
    }
}

static void
nautilus_floating_bar_set_property (GObject *object,
                    guint property_id,
                    const GValue *value,
                    GParamSpec *pspec)
{
    NautilusFloatingBar *self = NAUTILUS_FLOATING_BAR (object);

    switch (property_id) {
    case PROP_LABEL:
        nautilus_floating_bar_set_label (self, g_value_get_string (value));
        break;
    case PROP_SHOW_SPINNER:
        nautilus_floating_bar_set_show_spinner (self, g_value_get_boolean (value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
        break;
    }
}

static void
update_label (NautilusFloatingBar *self)
{
    gtk_label_set_text (GTK_LABEL (self->priv->label_widget), self->priv->label);
}

static gboolean
overlay_enter_notify_cb (GtkWidget        *parent,
             GdkEventCrossing *event,
             gpointer          user_data)
{
    GtkWidget *widget = user_data;

    if (event->window != gtk_widget_get_window (widget)) {
        return FALSE;
    }

    if (NAUTILUS_FLOATING_BAR (widget)->priv->is_interactive) {
        return FALSE;
    }

    if (gtk_widget_get_halign (widget) == GTK_ALIGN_START) {
        gtk_widget_set_halign (widget, GTK_ALIGN_END);
    } else {
        gtk_widget_set_halign (widget, GTK_ALIGN_START);
    }

    gtk_widget_queue_resize (widget);

    return FALSE;
}

static void
nautilus_floating_bar_parent_set (GtkWidget *widget,
                  GtkWidget *old_parent)
{
    GtkWidget *parent;

    parent = gtk_widget_get_parent (widget);

    if (old_parent != NULL) {
        g_signal_handlers_disconnect_by_func (old_parent,
                              overlay_enter_notify_cb, widget);
    }

    if (parent != NULL) {
        g_signal_connect (parent, "enter-notify-event",
                  G_CALLBACK (overlay_enter_notify_cb), widget);
    }
}

static void
nautilus_floating_bar_show (GtkWidget *widget)
{
    NautilusFloatingBar *self = NAUTILUS_FLOATING_BAR (widget);

    GTK_WIDGET_CLASS (nautilus_floating_bar_parent_class)->show (widget);

    if (self->priv->show_spinner) {
        gtk_spinner_start (GTK_SPINNER (self->priv->spinner));
    }
}

static void
nautilus_floating_bar_hide (GtkWidget *widget)
{
    NautilusFloatingBar *self = NAUTILUS_FLOATING_BAR (widget);

    GTK_WIDGET_CLASS (nautilus_floating_bar_parent_class)->hide (widget);

    gtk_spinner_stop (GTK_SPINNER (self->priv->spinner));
}

static gboolean
nautilus_floating_bar_draw (GtkWidget *widget,
                cairo_t *cr)
{
    GtkStyleContext *context;

    context = gtk_widget_get_style_context (widget);

    gtk_style_context_save (context);
    gtk_style_context_set_state (context, gtk_widget_get_state_flags (widget));

    gtk_render_background (context, cr, 0, 0,
                   gtk_widget_get_allocated_width (widget),
                   gtk_widget_get_allocated_height (widget));

    gtk_render_frame (context, cr, 0, 0,
              gtk_widget_get_allocated_width (widget),
              gtk_widget_get_allocated_height (widget));

    gtk_style_context_restore (context);

    return GTK_WIDGET_CLASS (nautilus_floating_bar_parent_class)->draw (widget, cr);;
}

static void
nautilus_floating_bar_constructed (GObject *obj)
{
    NautilusFloatingBar *self = NAUTILUS_FLOATING_BAR (obj);
    GtkWidget *w, *box;

    G_OBJECT_CLASS (nautilus_floating_bar_parent_class)->constructed (obj);

    box = GTK_WIDGET (obj);

    w = gtk_spinner_new ();
    gtk_box_pack_start (GTK_BOX (box), w, FALSE, FALSE, 0);
    gtk_widget_set_visible (w, self->priv->show_spinner);
    self->priv->spinner = w;

    gtk_widget_set_size_request (w, 16, 16);
    gtk_widget_set_margin_left (w, 8);

    w = gtk_label_new (NULL);
    gtk_label_set_ellipsize (GTK_LABEL (w), PANGO_ELLIPSIZE_MIDDLE);
    gtk_box_pack_start (GTK_BOX (box), w, FALSE, FALSE, 0);
    g_object_set (w,
              "margin-top", 2,
              "margin-bottom", 2,
              "margin-left", 12,
              "margin-right", 12,
              "max-width-chars", 60,
              NULL);
    self->priv->label_widget = w;
    gtk_widget_show (w);
}

static void
nautilus_floating_bar_init (NautilusFloatingBar *self)
{
    GtkStyleContext *context;

    self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, NAUTILUS_TYPE_FLOATING_BAR,
                          NautilusFloatingBarDetails);

    context = gtk_widget_get_style_context (GTK_WIDGET (self));
    gtk_style_context_add_class (context, "floating-bar");
}

static void
nautilus_floating_bar_class_init (NautilusFloatingBarClass *klass)
{
    GObjectClass *oclass = G_OBJECT_CLASS (klass);
    GtkWidgetClass *wclass = GTK_WIDGET_CLASS (klass);

    oclass->constructed = nautilus_floating_bar_constructed;
    oclass->set_property = nautilus_floating_bar_set_property;
    oclass->get_property = nautilus_floating_bar_get_property;
    oclass->finalize = nautilus_floating_bar_finalize;

    wclass->draw = nautilus_floating_bar_draw;
    wclass->show = nautilus_floating_bar_show;
    wclass->hide = nautilus_floating_bar_hide;
    wclass->parent_set = nautilus_floating_bar_parent_set;

    properties[PROP_LABEL] =
        g_param_spec_string ("label",
                     "Bar's label",
                     "Label displayed by the bar",
                     NULL,
                     G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS);
    properties[PROP_SHOW_SPINNER] =
        g_param_spec_boolean ("show-spinner",
                      "Show spinner",
                      "Whether a spinner should be shown in the floating bar",
                      FALSE,
                      G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    signals[ACTION] =
        g_signal_new ("action",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_LAST,
                  0, NULL, NULL,
                  g_cclosure_marshal_VOID__INT,
                  G_TYPE_NONE, 1,
                  G_TYPE_INT);

    g_type_class_add_private (klass, sizeof (NautilusFloatingBarDetails));
    g_object_class_install_properties (oclass, NUM_PROPERTIES, properties);
}

void
nautilus_floating_bar_set_label (NautilusFloatingBar *self,
                 const gchar *label)
{
    if (g_strcmp0 (self->priv->label, label) != 0) {
        g_free (self->priv->label);
        self->priv->label = g_strdup (label);

        g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_LABEL]);

        update_label (self);
    }
}

void
nautilus_floating_bar_set_show_spinner (NautilusFloatingBar *self,
                    gboolean show_spinner)
{
    if (self->priv->show_spinner != show_spinner) {
        self->priv->show_spinner = show_spinner;
        gtk_widget_set_visible (self->priv->spinner,
                    show_spinner);

        g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SHOW_SPINNER]);
    }
}

GtkWidget *
nautilus_floating_bar_new (const gchar *label,
               gboolean show_spinner)
{
    return g_object_new (NAUTILUS_TYPE_FLOATING_BAR,
                 "label", label,
                 "show-spinner", show_spinner,
                 "orientation", GTK_ORIENTATION_HORIZONTAL,
                 "spacing", 8,
                 NULL);
}

void
nautilus_floating_bar_add_action (NautilusFloatingBar *self,
                  const gchar *stock_id,
                  gint action_id)
{
    GtkWidget *w, *button;

    w = gtk_image_new_from_stock (stock_id, GTK_ICON_SIZE_MENU);
    gtk_widget_show (w);

    button = gtk_button_new ();
    gtk_button_set_image (GTK_BUTTON (button), w);
    gtk_box_pack_end (GTK_BOX (self), button, FALSE, FALSE, 0);
    gtk_widget_show (button);

    g_object_set_data (G_OBJECT (button), "action-id",
               GINT_TO_POINTER (action_id));

    g_signal_connect (button, "clicked",
              G_CALLBACK (action_button_clicked_cb), self);

    self->priv->is_interactive = TRUE;
}

void
nautilus_floating_bar_cleanup_actions (NautilusFloatingBar *self)
{
    GtkWidget *widget;
    GList *children, *l;
    gpointer data;

    children = gtk_container_get_children (GTK_CONTAINER (self));
    l = children;

    while (l != NULL) {
        widget = l->data;
        data = g_object_get_data (G_OBJECT (widget), "action-id");
        l = l->next;

        if (data != NULL) {
            /* destroy this */
            gtk_widget_destroy (widget);
        }
    }

    g_list_free (children);

    self->priv->is_interactive = FALSE;
}