gtkfontbutton.c 36.4 KB
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/* 
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 * GTK - The GIMP Toolkit
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 * Copyright (C) 1998 David Abilleira Freijeiro <odaf@nexo.es>
 * All rights reserved.
 *
 * Based on gnome-color-picker by Federico Mena <federico@nuclecu.unam.mx>
 *
 * 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
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 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
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 */
/*
 * Modified by the GTK+ Team and others 2003.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

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#include "config.h"
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#include "gtkfontbutton.h"

#include "gtkmain.h"
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#include "gtkbox.h"
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#include "gtklabel.h"
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#include "gtkfontchooser.h"
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#include "gtkfontchooserdialog.h"
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#include "gtkimage.h"
#include "gtkmarshalers.h"
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#include "gtkseparator.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"

#include <string.h>
#include <stdio.h>
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#include "gtkfontchooserutils.h"
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/**
 * SECTION:gtkfontbutton
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 * @Short_description: A button to launch a font chooser dialog
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 * @Title: GtkFontButton
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 * @See_also: #GtkFontChooserDialog, #GtkColorButton.
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 *
 * The #GtkFontButton is a button which displays the currently selected
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 * font an allows to open a font chooser dialog to change the font.
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 * It is suitable widget for selecting a font in a preference dialog.
 */


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struct _GtkFontButtonPrivate 
{
  gchar         *title;
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  gchar         *fontname;
  
  guint         use_font : 1;
  guint         use_size : 1;
  guint         show_style : 1;
  guint         show_size : 1;
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  guint         show_preview_entry : 1;
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  GtkWidget     *font_dialog;
  GtkWidget     *inside;
  GtkWidget     *font_label;
  GtkWidget     *size_label;
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  PangoFontDescription *font_desc;
  PangoFontFamily      *font_family;
  PangoFontFace        *font_face;
  gint                  font_size;
  gchar                *preview_text;
  GtkFontFilterFunc     font_filter;
  gpointer              font_filter_data;
  GDestroyNotify        font_filter_data_destroy;
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};

/* Signals */
enum 
{
  FONT_SET,
  LAST_SIGNAL
};

enum 
{
  PROP_0,
  PROP_TITLE,
  PROP_FONT_NAME,
  PROP_USE_FONT,
  PROP_USE_SIZE,
  PROP_SHOW_STYLE,
  PROP_SHOW_SIZE
};

/* Prototypes */
static void gtk_font_button_finalize               (GObject            *object);
static void gtk_font_button_get_property           (GObject            *object,
                                                    guint               param_id,
                                                    GValue             *value,
                                                    GParamSpec         *pspec);
static void gtk_font_button_set_property           (GObject            *object,
                                                    guint               param_id,
                                                    const GValue       *value,
                                                    GParamSpec         *pspec);

static void gtk_font_button_clicked                 (GtkButton         *button);

/* Dialog response functions */
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static void response_cb                             (GtkDialog         *dialog,
                                                     gint               response_id,
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                                                     gpointer           data);
static void dialog_destroy                          (GtkWidget         *widget,
                                                     gpointer           data);

/* Auxiliary functions */
static GtkWidget *gtk_font_button_create_inside     (GtkFontButton     *gfs);
static void gtk_font_button_label_use_font          (GtkFontButton     *gfs);
static void gtk_font_button_update_font_info        (GtkFontButton     *gfs);

static guint font_button_signals[LAST_SIGNAL] = { 0 };

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static void
clear_font_data (GtkFontButton *font_button)
{
  GtkFontButtonPrivate *priv = font_button->priv;

  if (priv->font_family)
    g_object_unref (priv->font_family);
  priv->font_family = NULL;

  if (priv->font_face)
    g_object_unref (priv->font_face);
  priv->font_face = NULL;

  if (priv->font_desc)
    pango_font_description_free (priv->font_desc);
  priv->font_desc = NULL;

  g_free (priv->fontname);
  priv->fontname = NULL;
}

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static void
clear_font_filter_data (GtkFontButton *font_button)
{
  GtkFontButtonPrivate *priv = font_button->priv;

  if (priv->font_filter_data_destroy)
    priv->font_filter_data_destroy (priv->font_filter_data);
  priv->font_filter = NULL;
  priv->font_filter_data = NULL;
  priv->font_filter_data_destroy = NULL;
}

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static gboolean
font_description_style_equal (const PangoFontDescription *a,
                              const PangoFontDescription *b)
{
  return (pango_font_description_get_weight (a) == pango_font_description_get_weight (b) &&
          pango_font_description_get_style (a) == pango_font_description_get_style (b) &&
          pango_font_description_get_stretch (a) == pango_font_description_get_stretch (b) &&
          pango_font_description_get_variant (a) == pango_font_description_get_variant (b));
}

static void
gtk_font_button_update_font_data (GtkFontButton *font_button)
{
  GtkFontButtonPrivate *priv = font_button->priv;
  PangoFontFamily **families;
  PangoFontFace **faces;
  gint n_families, n_faces, i;
  const gchar *family;

  g_assert (priv->font_desc != NULL);

  priv->fontname = pango_font_description_to_string (priv->font_desc);

  family = pango_font_description_get_family (priv->font_desc);
  if (family == NULL)
    return;

  n_families = 0;
  families = NULL;
  pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (font_button)),
                               &families, &n_families);
  n_faces = 0;
  faces = NULL;
  for (i = 0; i < n_families; i++)
    {
      const gchar *name = pango_font_family_get_name (families[i]);

      if (!g_ascii_strcasecmp (name, family))
        {
          priv->font_family = g_object_ref (families[i]);

          pango_font_family_list_faces (families[i], &faces, &n_faces);
          break;
        }
    }
  g_free (families);

  for (i = 0; i < n_faces; i++)
    {
      PangoFontDescription *tmp_desc = pango_font_face_describe (faces[i]);

      if (font_description_style_equal (tmp_desc, priv->font_desc))
        {
          priv->font_face = g_object_ref (faces[i]);

          pango_font_description_free (tmp_desc);
          break;
        }
      else
        pango_font_description_free (tmp_desc);
    }

  g_free (faces);
}

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static gchar *
gtk_font_button_get_preview_text (GtkFontButton *font_button)
{
  GtkFontButtonPrivate *priv = font_button->priv;

  if (priv->font_dialog)
    return gtk_font_chooser_get_preview_text (GTK_FONT_CHOOSER (priv->font_dialog));

  return g_strdup (priv->preview_text);
}

static void
gtk_font_button_set_preview_text (GtkFontButton *font_button,
                                  const gchar   *preview_text)
{
  GtkFontButtonPrivate *priv = font_button->priv;

  if (priv->font_dialog)
    {
      gtk_font_chooser_set_preview_text (GTK_FONT_CHOOSER (priv->font_dialog),
                                         preview_text);
      return;
    }

  g_free (priv->preview_text);
  priv->preview_text = g_strdup (preview_text);
}


static gboolean
gtk_font_button_get_show_preview_entry (GtkFontButton *font_button)
{
  GtkFontButtonPrivate *priv = font_button->priv;

  if (priv->font_dialog)
    return gtk_font_chooser_get_show_preview_entry (GTK_FONT_CHOOSER (priv->font_dialog));

  return priv->show_preview_entry;
}

static void
gtk_font_button_set_show_preview_entry (GtkFontButton *font_button,
                                        gboolean       show)
{
  GtkFontButtonPrivate *priv = font_button->priv;

  if (priv->font_dialog)
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    gtk_font_chooser_set_show_preview_entry (GTK_FONT_CHOOSER (priv->font_dialog), show);
  else
    priv->show_preview_entry = show != FALSE;
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}

static PangoFontFamily *
gtk_font_button_font_chooser_get_font_family (GtkFontChooser *chooser)
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
  GtkFontButtonPrivate *priv = font_button->priv;

  return priv->font_family;
}

static PangoFontFace *
gtk_font_button_font_chooser_get_font_face (GtkFontChooser *chooser)
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
  GtkFontButtonPrivate *priv = font_button->priv;

  return priv->font_face;
}

static int
gtk_font_button_font_chooser_get_font_size (GtkFontChooser *chooser)
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
  GtkFontButtonPrivate *priv = font_button->priv;

  return priv->font_size;
}

static void
gtk_font_button_font_chooser_set_filter_func (GtkFontChooser    *chooser,
                                              GtkFontFilterFunc  filter_func,
                                              gpointer           filter_data,
                                              GDestroyNotify     data_destroy)
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (chooser);
  GtkFontButtonPrivate *priv = font_button->priv;

  if (priv->font_dialog)
    {
      gtk_font_chooser_set_filter_func (GTK_FONT_CHOOSER (priv->font_dialog),
                                        filter_func,
                                        filter_data,
                                        data_destroy);
      return;
    }

  clear_font_filter_data (font_button);
  priv->font_filter = filter_func;
  priv->font_filter_data = filter_data;
  priv->font_filter_data_destroy = data_destroy;
}

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static void
gtk_font_button_take_font_desc (GtkFontButton        *font_button,
                                PangoFontDescription *font_desc)
{
  GtkFontButtonPrivate *priv = font_button->priv;
  GObject *object = G_OBJECT (font_button);

  if (priv->font_desc && font_desc &&
      pango_font_description_equal (priv->font_desc, font_desc))
    {
      pango_font_description_free (font_desc);
      return;
    }

  g_object_freeze_notify (object);

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  clear_font_data (font_button);

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  if (font_desc)
    priv->font_desc = font_desc; /* adopted */
  else
    priv->font_desc = pango_font_description_from_string (_("Sans 12"));

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  if (pango_font_description_get_size_is_absolute (priv->font_desc))
    priv->font_size = pango_font_description_get_size (priv->font_desc);
  else 
    priv->font_size = pango_font_description_get_size (priv->font_desc) / PANGO_SCALE;

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  gtk_font_button_update_font_data (font_button);
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  gtk_font_button_update_font_info (font_button);

  if (priv->font_dialog)
    gtk_font_chooser_set_font_desc (GTK_FONT_CHOOSER (priv->font_dialog),
                                    priv->font_desc);

  g_object_notify (G_OBJECT (font_button), "font");
  g_object_notify (G_OBJECT (font_button), "font-desc");
  g_object_notify (G_OBJECT (font_button), "font-name");

  g_object_thaw_notify (object);
}

static const PangoFontDescription *
gtk_font_button_get_font_desc (GtkFontButton *font_button)
{
  return font_button->priv->font_desc;
}

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static void
gtk_font_button_font_chooser_notify (GObject    *object,
                                     GParamSpec *pspec,
                                     gpointer    user_data)
{
  /* We do not forward the notification of the "font" property to the dialog! */
  if (pspec->name == I_("preview-text") ||
      pspec->name == I_("show-preview-entry"))
    g_object_notify_by_pspec (user_data, pspec);
}

static void
gtk_font_button_font_chooser_iface_init (GtkFontChooserIface *iface)
{
  iface->get_font_family = gtk_font_button_font_chooser_get_font_family;
  iface->get_font_face = gtk_font_button_font_chooser_get_font_face;
  iface->get_font_size = gtk_font_button_font_chooser_get_font_size;
  iface->set_filter_func = gtk_font_button_font_chooser_set_filter_func;
}

G_DEFINE_TYPE_WITH_CODE (GtkFontButton, gtk_font_button, GTK_TYPE_BUTTON,
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
                                                gtk_font_button_font_chooser_iface_init))
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static void
gtk_font_button_class_init (GtkFontButtonClass *klass)
{
  GObjectClass *gobject_class;
  GtkButtonClass *button_class;
  
  gobject_class = (GObjectClass *) klass;
  button_class = (GtkButtonClass *) klass;

  gobject_class->finalize = gtk_font_button_finalize;
  gobject_class->set_property = gtk_font_button_set_property;
  gobject_class->get_property = gtk_font_button_get_property;
  
  button_class->clicked = gtk_font_button_clicked;
  
  klass->font_set = NULL;

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  _gtk_font_chooser_install_properties (gobject_class);

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  /**
   * GtkFontButton:title:
   * 
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   * The title of the font chooser dialog.
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   *
   * Since: 2.4
   */
  g_object_class_install_property (gobject_class,
                                   PROP_TITLE,
                                   g_param_spec_string ("title",
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                                                        P_("Title"),
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                                                        P_("The title of the font chooser dialog"),
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                                                        _("Pick a Font"),
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                                                        (GTK_PARAM_READABLE |
                                                         GTK_PARAM_WRITABLE)));
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  /**
   * GtkFontButton:font-name:
   * 
   * The name of the currently selected font.
   *
   * Since: 2.4
   */
  g_object_class_install_property (gobject_class,
                                   PROP_FONT_NAME,
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                                   g_param_spec_string ("font-name",
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                                                        P_("Font name"),
                                                        P_("The name of the selected font"),
                                                        P_("Sans 12"),
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                                                        (GTK_PARAM_READABLE |
                                                         GTK_PARAM_WRITABLE)));
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  /**
   * GtkFontButton:use-font:
   * 
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   * If this property is set to %TRUE, the label will be drawn 
   * in the selected font.
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   *
   * Since: 2.4
   */
  g_object_class_install_property (gobject_class,
                                   PROP_USE_FONT,
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                                   g_param_spec_boolean ("use-font",
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                                                         P_("Use font in label"),
                                                         P_("Whether the label is drawn in the selected font"),
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                                                         FALSE,
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                                                         GTK_PARAM_READWRITE));
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  /**
   * GtkFontButton:use-size:
   * 
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   * If this property is set to %TRUE, the label will be drawn 
   * with the selected font size.
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   *
   * Since: 2.4
   */
  g_object_class_install_property (gobject_class,
                                   PROP_USE_SIZE,
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                                   g_param_spec_boolean ("use-size",
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                                                         P_("Use size in label"),
                                                         P_("Whether the label is drawn with the selected font size"),
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                                                         FALSE,
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                                                         GTK_PARAM_READWRITE));
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  /**
   * GtkFontButton:show-style:
   * 
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   * If this property is set to %TRUE, the name of the selected font style 
   * will be shown in the label. For a more WYSIWYG way to show the selected 
   * style, see the ::use-font property. 
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   *
   * Since: 2.4
   */
  g_object_class_install_property (gobject_class,
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                                   PROP_SHOW_STYLE,
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                                   g_param_spec_boolean ("show-style",
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                                                         P_("Show style"),
                                                         P_("Whether the selected font style is shown in the label"),
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                                                         TRUE,
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                                                         GTK_PARAM_READWRITE));
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  /**
   * GtkFontButton:show-size:
   * 
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   * If this property is set to %TRUE, the selected font size will be shown 
   * in the label. For a more WYSIWYG way to show the selected size, see the 
   * ::use-size property. 
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   *
   * Since: 2.4
   */
  g_object_class_install_property (gobject_class,
                                   PROP_SHOW_SIZE,
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                                   g_param_spec_boolean ("show-size",
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                                                         P_("Show size"),
                                                         P_("Whether selected font size is shown in the label"),
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                                                         TRUE,
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                                                         GTK_PARAM_READWRITE));
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  /**
   * GtkFontButton::font-set:
   * @widget: the object which received the signal.
   * 
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   * The ::font-set signal is emitted when the user selects a font. 
   * When handling this signal, use gtk_font_button_get_font_name() 
   * to find out which font was just selected.
   *
   * Note that this signal is only emitted when the <emphasis>user</emphasis>
   * changes the font. If you need to react to programmatic font changes
   * as well, use the notify::font-name signal.
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   *
   * Since: 2.4
   */
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  font_button_signals[FONT_SET] = g_signal_new (I_("font-set"),
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                                                G_TYPE_FROM_CLASS (gobject_class),
                                                G_SIGNAL_RUN_FIRST,
                                                G_STRUCT_OFFSET (GtkFontButtonClass, font_set),
                                                NULL, NULL,
                                                g_cclosure_marshal_VOID__VOID,
                                                G_TYPE_NONE, 0);
  
  g_type_class_add_private (gobject_class, sizeof (GtkFontButtonPrivate));
}

static void
gtk_font_button_init (GtkFontButton *font_button)
{
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  font_button->priv = G_TYPE_INSTANCE_GET_PRIVATE (font_button,
                                                   GTK_TYPE_FONT_BUTTON,
                                                   GtkFontButtonPrivate);
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  /* Initialize fields */
  font_button->priv->use_font = FALSE;
  font_button->priv->use_size = FALSE;
  font_button->priv->show_style = TRUE;
  font_button->priv->show_size = TRUE;
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  font_button->priv->show_preview_entry = FALSE;
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  font_button->priv->font_dialog = NULL;
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  font_button->priv->font_family = NULL;
  font_button->priv->font_face = NULL;
  font_button->priv->font_size = -1;
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  font_button->priv->title = g_strdup (_("Pick a Font"));

  font_button->priv->inside = gtk_font_button_create_inside (font_button);
  gtk_container_add (GTK_CONTAINER (font_button), font_button->priv->inside);

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  gtk_font_button_take_font_desc (font_button, NULL);
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}

static void
gtk_font_button_finalize (GObject *object)
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (object);

  if (font_button->priv->font_dialog != NULL) 
    gtk_widget_destroy (font_button->priv->font_dialog);
  font_button->priv->font_dialog = NULL;

  g_free (font_button->priv->title);
  font_button->priv->title = NULL;
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  clear_font_data (font_button);
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  clear_font_filter_data (font_button);

  g_free (font_button->priv->preview_text);
  font_button->priv->preview_text = NULL;

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  G_OBJECT_CLASS (gtk_font_button_parent_class)->finalize (object);
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}

static void
gtk_font_button_set_property (GObject      *object,
                              guint         param_id,
                              const GValue *value,
                              GParamSpec   *pspec)
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (object);
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  switch (param_id) 
    {
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    case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
      gtk_font_button_set_preview_text (font_button, g_value_get_string (value));
      break;
    case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
      gtk_font_button_set_show_preview_entry (font_button, g_value_get_boolean (value));
      break;
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    case PROP_TITLE:
      gtk_font_button_set_title (font_button, g_value_get_string (value));
      break;
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    case GTK_FONT_CHOOSER_PROP_FONT_DESC:
      gtk_font_button_take_font_desc (font_button, g_value_dup_boxed (value));
      break;
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    case GTK_FONT_CHOOSER_PROP_FONT:
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    case PROP_FONT_NAME:
      gtk_font_button_set_font_name (font_button, g_value_get_string (value));
      break;
    case PROP_USE_FONT:
      gtk_font_button_set_use_font (font_button, g_value_get_boolean (value));
      break;
    case PROP_USE_SIZE:
      gtk_font_button_set_use_size (font_button, g_value_get_boolean (value));
      break;
    case PROP_SHOW_STYLE:
      gtk_font_button_set_show_style (font_button, g_value_get_boolean (value));
      break;
    case PROP_SHOW_SIZE:
      gtk_font_button_set_show_size (font_button, g_value_get_boolean (value));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
      break;
  }
}

static void
gtk_font_button_get_property (GObject    *object,
                              guint       param_id,
                              GValue     *value,
                              GParamSpec *pspec)
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (object);
  
  switch (param_id) 
    {
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    case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
      g_value_set_string (value, gtk_font_button_get_preview_text (font_button));
      break;
    case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
      g_value_set_boolean (value, gtk_font_button_get_show_preview_entry (font_button));
      break;
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    case PROP_TITLE:
      g_value_set_string (value, gtk_font_button_get_title (font_button));
      break;
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    case GTK_FONT_CHOOSER_PROP_FONT_DESC:
      g_value_set_boxed (value, gtk_font_button_get_font_desc (font_button));
      break;
658
    case GTK_FONT_CHOOSER_PROP_FONT:
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    case PROP_FONT_NAME:
      g_value_set_string (value, gtk_font_button_get_font_name (font_button));
      break;
    case PROP_USE_FONT:
      g_value_set_boolean (value, gtk_font_button_get_use_font (font_button));
      break;
    case PROP_USE_SIZE:
      g_value_set_boolean (value, gtk_font_button_get_use_size (font_button));
      break;
    case PROP_SHOW_STYLE:
      g_value_set_boolean (value, gtk_font_button_get_show_style (font_button));
      break;
    case PROP_SHOW_SIZE:
      g_value_set_boolean (value, gtk_font_button_get_show_size (font_button));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
      break;
    }
} 


/**
 * gtk_font_button_new:
 *
 * Creates a new font picker widget.
 *
 * Returns: a new font picker widget.
 *
 * Since: 2.4
 */
GtkWidget *
gtk_font_button_new (void)
{
  return g_object_new (GTK_TYPE_FONT_BUTTON, NULL);
} 

/**
 * gtk_font_button_new_with_font:
698
 * @fontname: Name of font to display in font chooser dialog
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 *
 * Creates a new font picker widget.
 *
 * Returns: a new font picker widget.
 *
 * Since: 2.4
 */
GtkWidget *
gtk_font_button_new_with_font (const gchar *fontname)
{
709
  return g_object_new (GTK_TYPE_FONT_BUTTON, "font-name", fontname, NULL);
710 711 712 713 714
} 

/**
 * gtk_font_button_set_title:
 * @font_button: a #GtkFontButton
715
 * @title: a string containing the font chooser dialog title
716
 *
717
 * Sets the title for the font chooser dialog.  
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 *
 * Since: 2.4
 */
void
gtk_font_button_set_title (GtkFontButton *font_button, 
                           const gchar   *title)
{
  gchar *old_title;
  g_return_if_fail (GTK_IS_FONT_BUTTON (font_button));
  
  old_title = font_button->priv->title;
  font_button->priv->title = g_strdup (title);
  g_free (old_title);
  
  if (font_button->priv->font_dialog)
    gtk_window_set_title (GTK_WINDOW (font_button->priv->font_dialog),
                          font_button->priv->title);

  g_object_notify (G_OBJECT (font_button), "title");
} 

/**
 * gtk_font_button_get_title:
 * @font_button: a #GtkFontButton
 *
743
 * Retrieves the title of the font chooser dialog.
744 745 746 747 748
 *
 * Returns: an internal copy of the title string which must not be freed.
 *
 * Since: 2.4
 */
749
const gchar*
750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
gtk_font_button_get_title (GtkFontButton *font_button)
{
  g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), NULL);

  return font_button->priv->title;
} 

/**
 * gtk_font_button_get_use_font:
 * @font_button: a #GtkFontButton
 *
 * Returns whether the selected font is used in the label.
 *
 * Returns: whether the selected font is used in the label.
 *
 * Since: 2.4
 */
gboolean
gtk_font_button_get_use_font (GtkFontButton *font_button)
{
  g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), FALSE);

  return font_button->priv->use_font;
} 

/**
 * gtk_font_button_set_use_font:
 * @font_button: a #GtkFontButton
 * @use_font: If %TRUE, font name will be written using font chosen.
 *
 * If @use_font is %TRUE, the font name will be written using the selected font.  
 *
 * Since: 2.4
 */
void  
gtk_font_button_set_use_font (GtkFontButton *font_button,
			      gboolean       use_font)
{
  g_return_if_fail (GTK_IS_FONT_BUTTON (font_button));
  
  use_font = (use_font != FALSE);
  
  if (font_button->priv->use_font != use_font) 
    {
      font_button->priv->use_font = use_font;

796
      gtk_font_button_label_use_font (font_button);
797
 
798
      g_object_notify (G_OBJECT (font_button), "use-font");
799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831
    }
} 


/**
 * gtk_font_button_get_use_size:
 * @font_button: a #GtkFontButton
 *
 * Returns whether the selected size is used in the label.
 *
 * Returns: whether the selected size is used in the label.
 *
 * Since: 2.4
 */
gboolean
gtk_font_button_get_use_size (GtkFontButton *font_button)
{
  g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), FALSE);

  return font_button->priv->use_size;
} 

/**
 * gtk_font_button_set_use_size:
 * @font_button: a #GtkFontButton
 * @use_size: If %TRUE, font name will be written using the selected size.
 *
 * If @use_size is %TRUE, the font name will be written using the selected size.
 *
 * Since: 2.4
 */
void  
gtk_font_button_set_use_size (GtkFontButton *font_button,
832
                              gboolean       use_size)
833 834 835 836 837 838 839 840
{
  g_return_if_fail (GTK_IS_FONT_BUTTON (font_button));
  
  use_size = (use_size != FALSE);
  if (font_button->priv->use_size != use_size) 
    {
      font_button->priv->use_size = use_size;

841
      gtk_font_button_label_use_font (font_button);
842

843
      g_object_notify (G_OBJECT (font_button), "use-size");
844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886
    }
} 

/**
 * gtk_font_button_get_show_style:
 * @font_button: a #GtkFontButton
 * 
 * Returns whether the name of the font style will be shown in the label.
 * 
 * Return value: whether the font style will be shown in the label.
 *
 * Since: 2.4
 **/
gboolean 
gtk_font_button_get_show_style (GtkFontButton *font_button)
{
  g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), FALSE);

  return font_button->priv->show_style;
}

/**
 * gtk_font_button_set_show_style:
 * @font_button: a #GtkFontButton
 * @show_style: %TRUE if font style should be displayed in label.
 *
 * If @show_style is %TRUE, the font style will be displayed along with name of the selected font.
 *
 * Since: 2.4
 */
void
gtk_font_button_set_show_style (GtkFontButton *font_button,
                                gboolean       show_style)
{
  g_return_if_fail (GTK_IS_FONT_BUTTON (font_button));
  
  show_style = (show_style != FALSE);
  if (font_button->priv->show_style != show_style) 
    {
      font_button->priv->show_style = show_style;
      
      gtk_font_button_update_font_info (font_button);
  
887
      g_object_notify (G_OBJECT (font_button), "show-style");
888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936
    }
} 


/**
 * gtk_font_button_get_show_size:
 * @font_button: a #GtkFontButton
 * 
 * Returns whether the font size will be shown in the label.
 * 
 * Return value: whether the font size will be shown in the label.
 *
 * Since: 2.4
 **/
gboolean 
gtk_font_button_get_show_size (GtkFontButton *font_button)
{
  g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), FALSE);

  return font_button->priv->show_size;
}

/**
 * gtk_font_button_set_show_size:
 * @font_button: a #GtkFontButton
 * @show_size: %TRUE if font size should be displayed in dialog.
 *
 * If @show_size is %TRUE, the font size will be displayed along with the name of the selected font.
 *
 * Since: 2.4
 */
void
gtk_font_button_set_show_size (GtkFontButton *font_button,
                               gboolean       show_size)
{
  g_return_if_fail (GTK_IS_FONT_BUTTON (font_button));
  
  show_size = (show_size != FALSE);

  if (font_button->priv->show_size != show_size) 
    {
      font_button->priv->show_size = show_size;

      gtk_container_remove (GTK_CONTAINER (font_button), font_button->priv->inside);
      font_button->priv->inside = gtk_font_button_create_inside (font_button);
      gtk_container_add (GTK_CONTAINER (font_button), font_button->priv->inside);
      
      gtk_font_button_update_font_info (font_button);

937
      g_object_notify (G_OBJECT (font_button), "show-size");
938 939 940 941 942 943 944 945
    }
} 


/**
 * gtk_font_button_get_font_name:
 * @font_button: a #GtkFontButton
 *
946 947 948 949 950 951
 * Retrieves the name of the currently selected font. This name includes
 * style and size information as well. If you want to render something
 * with the font, use this string with pango_font_description_from_string() .
 * If you're interested in peeking certain values (family name,
 * style, size, weight) just query these properties from the
 * #PangoFontDescription object.
952 953 954 955 956
 *
 * Returns: an internal copy of the font name which must not be freed.
 *
 * Since: 2.4
 */
957
const gchar *
958 959 960
gtk_font_button_get_font_name (GtkFontButton *font_button)
{
  g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), NULL);
961

962 963 964 965 966 967
  return font_button->priv->fontname;
}

/**
 * gtk_font_button_set_font_name:
 * @font_button: a #GtkFontButton
968
 * @fontname: Name of font to display in font chooser dialog
969 970 971
 *
 * Sets or updates the currently-displayed font in font picker dialog.
 *
972
 * Returns: %TRUE
973 974 975 976 977 978 979
 *
 * Since: 2.4
 */
gboolean 
gtk_font_button_set_font_name (GtkFontButton *font_button,
                               const gchar    *fontname)
{
980
  PangoFontDescription *font_desc;
981 982 983 984

  g_return_val_if_fail (GTK_IS_FONT_BUTTON (font_button), FALSE);
  g_return_val_if_fail (fontname != NULL, FALSE);

985 986
  font_desc = pango_font_description_from_string (fontname);
  gtk_font_button_take_font_desc (font_button, font_desc);
987

988
  return TRUE;
989 990 991 992 993
}

static void
gtk_font_button_clicked (GtkButton *button)
{
994 995
  GtkFontChooser *font_dialog;
  GtkFontButton  *font_button = GTK_FONT_BUTTON (button);
996
  GtkFontButtonPrivate *priv = font_button->priv;
997 998 999 1000 1001 1002
  
  if (!font_button->priv->font_dialog) 
    {
      GtkWidget *parent;
      
      parent = gtk_widget_get_toplevel (GTK_WIDGET (font_button));
1003 1004

      priv->font_dialog = gtk_font_chooser_dialog_new (priv->title, NULL);
1005
      font_dialog = GTK_FONT_CHOOSER (font_button->priv->font_dialog);
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026

      gtk_font_chooser_set_show_preview_entry (font_dialog, priv->show_preview_entry);

      if (priv->preview_text)
        {
          gtk_font_chooser_set_preview_text (font_dialog, priv->preview_text);
          g_free (priv->preview_text);
          priv->preview_text = NULL;
        }

      if (priv->font_filter)
        {
          gtk_font_chooser_set_filter_func (font_dialog,
                                            priv->font_filter,
                                            priv->font_filter_data,
                                            priv->font_filter_data_destroy);
          priv->font_filter = NULL;
          priv->font_filter_data = NULL;
          priv->font_filter_data_destroy = NULL;
        }

1027
      if (gtk_widget_is_toplevel (parent) && GTK_IS_WINDOW (parent))
1028 1029
        {
          if (GTK_WINDOW (parent) != gtk_window_get_transient_for (GTK_WINDOW (font_dialog)))
1030 1031 1032 1033 1034 1035
            gtk_window_set_transient_for (GTK_WINDOW (font_dialog), GTK_WINDOW (parent));

          gtk_window_set_modal (GTK_WINDOW (font_dialog),
                                gtk_window_get_modal (GTK_WINDOW (parent)));
        }

1036 1037 1038
      g_signal_connect (font_dialog, "notify",
                        G_CALLBACK (gtk_font_button_font_chooser_notify), button);

1039 1040 1041
      g_signal_connect (font_dialog, "response",
                        G_CALLBACK (response_cb), font_button);

1042 1043 1044 1045
      g_signal_connect (font_dialog, "destroy",
                        G_CALLBACK (dialog_destroy), font_button);
    }
  
1046
  if (!gtk_widget_get_visible (font_button->priv->font_dialog))
1047
    {
1048
      font_dialog = GTK_FONT_CHOOSER (font_button->priv->font_dialog);
1049
      gtk_font_chooser_set_font_desc (font_dialog, font_button->priv->font_desc);
1050 1051 1052 1053 1054
    } 

  gtk_window_present (GTK_WINDOW (font_button->priv->font_dialog));
}

1055

1056
static void
1057 1058 1059
response_cb (GtkDialog *dialog,
             gint       response_id,
             gpointer   data)
1060 1061
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (data);
1062 1063
  GtkFontButtonPrivate *priv = font_button->priv;
  GtkFontChooser *font_chooser;
1064
  GObject *object;
1065

1066
  gtk_widget_hide (font_button->priv->font_dialog);
1067 1068 1069 1070

  if (response_id != GTK_RESPONSE_OK)
    return;

1071
  font_chooser = GTK_FONT_CHOOSER (priv->font_dialog);
1072 1073 1074 1075
  object = G_OBJECT (font_chooser);

  g_object_freeze_notify (object);

1076
  clear_font_data (font_button);
1077

1078 1079 1080
  priv->font_desc = gtk_font_chooser_get_font_desc (font_chooser);
  if (priv->font_desc)
    priv->fontname = pango_font_description_to_string (priv->font_desc);
1081
  priv->font_family = gtk_font_chooser_get_font_family (font_chooser);
1082 1083
  if (priv->font_family)
    g_object_ref (priv->font_family);
1084
  priv->font_face = gtk_font_chooser_get_font_face (font_chooser);
1085 1086
  if (priv->font_face)
    g_object_ref (priv->font_face);
1087
  priv->font_size = gtk_font_chooser_get_font_size (font_chooser);
1088

1089 1090 1091
  /* Set label font */
  gtk_font_button_update_font_info (font_button);

1092
  g_object_notify (G_OBJECT (font_button), "font");
1093
  g_object_notify (G_OBJECT (font_button), "font-desc");
1094
  g_object_notify (G_OBJECT (font_button), "font-name");
1095 1096 1097

  g_object_thaw_notify (object);

1098 1099 1100 1101 1102 1103
  /* Emit font_set signal */
  g_signal_emit (font_button, font_button_signals[FONT_SET], 0);
}

static void
dialog_destroy (GtkWidget *widget,
1104
                gpointer   data)
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118
{
  GtkFontButton *font_button = GTK_FONT_BUTTON (data);
    
  /* Dialog will get destroyed so reference is not valid now */
  font_button->priv->font_dialog = NULL;
} 

static GtkWidget *
gtk_font_button_create_inside (GtkFontButton *font_button)
{
  GtkWidget *widget;
  
  gtk_widget_push_composite_child ();

1119 1120
  widget = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);

1121 1122 1123 1124 1125 1126 1127
  font_button->priv->font_label = gtk_label_new (_("Font"));
  
  gtk_label_set_justify (GTK_LABEL (font_button->priv->font_label), GTK_JUSTIFY_LEFT);
  gtk_box_pack_start (GTK_BOX (widget), font_button->priv->font_label, TRUE, TRUE, 5);

  if (font_button->priv->show_size) 
    {
1128
      gtk_box_pack_start (GTK_BOX (widget), gtk_separator_new (GTK_ORIENTATION_VERTICAL), FALSE, FALSE, 0);
1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
      font_button->priv->size_label = gtk_label_new ("14");
      gtk_box_pack_start (GTK_BOX (widget), font_button->priv->size_label, FALSE, FALSE, 5);
    }

  gtk_widget_show_all (widget);

  gtk_widget_pop_composite_child ();

  return widget;
} 

static void
gtk_font_button_label_use_font (GtkFontButton *font_button)
{
  PangoFontDescription *desc;

1145 1146 1147
  if (font_button->priv->use_font)
    {
      desc = pango_font_description_copy (font_button->priv->font_desc);
1148

1149 1150 1151 1152 1153
      if (!font_button->priv->use_size)
        pango_font_description_unset_fields (desc, PANGO_FONT_MASK_SIZE);
    }
  else
    desc = NULL;
1154

1155
  gtk_widget_override_font (font_button->priv->font_label, desc);
1156

1157 1158
  if (desc)
    pango_font_description_free (desc);
1159 1160 1161 1162 1163
}

static void
gtk_font_button_update_font_info (GtkFontButton *font_button)
{
1164
  GtkFontButtonPrivate *priv = font_button->priv;
1165
  gchar *family_style;
1166

1167
  g_assert (priv->font_desc != NULL);
1168

1169
  if (priv->show_style)
1170
    {
1171
      PangoFontDescription *desc = pango_font_description_copy_static (priv->font_desc);
1172

1173 1174 1175
      pango_font_description_unset_fields (desc, PANGO_FONT_MASK_SIZE);
      family_style = pango_font_description_to_string (desc);
      pango_font_description_free (desc);
1176 1177
    }
  else
1178
    family_style = g_strdup (pango_font_description_get_family (priv->font_desc));
1179

1180 1181 1182 1183 1184
  gtk_label_set_text (GTK_LABEL (font_button->priv->font_label), family_style);
  g_free (family_style);

  if (font_button->priv->show_size) 
    {
1185 1186 1187 1188
      /* mirror Pango, which doesn't translate this either */
      gchar *size = g_strdup_printf ("%g%s",
                                     pango_font_description_get_size (priv->font_desc) / (double)PANGO_SCALE,
                                     pango_font_description_get_size_is_absolute (priv->font_desc) ? "px" : "");
1189 1190 1191 1192 1193 1194 1195 1196
      
      gtk_label_set_text (GTK_LABEL (font_button->priv->size_label), size);
      
      g_free (size);
    }

  gtk_font_button_label_use_font (font_button);
}