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gtk2/gtk/gtkfilechooserdialog.c
Matthias Clasen 5ff8fe6971 Documentation fixes 
Mostly making sure that return values and varargs don't loose
their docs.
2011-09-25 21:04:49 -04:00

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/* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
/* GTK - The GIMP Toolkit
* gtkfilechooserdialog.c: File selector dialog
* Copyright (C) 2003, Red Hat, Inc.
*
* This library 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) 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
#include "config.h"
#include "gtkfilechooserdialog.h"
#include "gtkfilechooserprivate.h"
#include "gtkfilechooserwidget.h"
#include "gtkfilechooserutils.h"
#include "gtkfilechooserembed.h"
#include "gtkfilesystem.h"
#include "gtksizerequest.h"
#include "gtktypebuiltins.h"
#include "gtkintl.h"
#include <stdarg.h>
/**
* SECTION:gtkfilechooserdialog
* @Short_description: A file chooser dialog, suitable for "File/Open" or "File/Save" commands
* @Title: GtkFileChooserDialog
* @See_also: #GtkFileChooser, #GtkDialog
*
* #GtkFileChooserDialog is a dialog box suitable for use with
* "File/Open" or "File/Save as" commands. This widget works by
* putting a #GtkFileChooserWidget inside a #GtkDialog. It exposes
* the #GtkFileChooserIface interface, so you can use all of the
* #GtkFileChooser functions on the file chooser dialog as well as
* those for #GtkDialog.
*
* Note that #GtkFileChooserDialog does not have any methods of its
* own. Instead, you should use the functions that work on a
* #GtkFileChooser.
*
* <example id="gtkfilechooser-typical-usage">
* <title>Typical usage</title>
* In the simplest of cases, you can the following code to use
* #GtkFileChooserDialog to select a file for opening:
* <para>
* <informalexample><programlisting>
* GtkWidget *dialog;
*
* dialog = gtk_file_chooser_dialog_new ("Open File",
* parent_window,
* GTK_FILE_CHOOSER_ACTION_OPEN,
* GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
* GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
* NULL);
*
* if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
* {
* char *filename;
*
* filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
* open_file (filename);
* g_free (filename);
* }
*
* gtk_widget_destroy (dialog);
* </programlisting></informalexample>
* </para>
* To use a dialog for saving, you can use this:
* <para>
* <informalexample><programlisting>
* GtkWidget *dialog;
*
* dialog = gtk_file_chooser_dialog_new ("Save File",
* parent_window,
* GTK_FILE_CHOOSER_ACTION_SAVE,
* GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
* GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT,
* NULL);
* gtk_file_chooser_set_do_overwrite_confirmation (GTK_FILE_CHOOSER (dialog), TRUE);
*
* if (user_edited_a_new_document)
* gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (dialog), "Untitled document");
* else
* gtk_file_chooser_set_filename (GTK_FILE_CHOOSER (dialog), filename_for_existing_document);
*
* if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
* {
* char *filename;
*
* filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
* save_to_file (filename);
* g_free (filename);
* }
*
* gtk_widget_destroy (dialog);
* </programlisting></informalexample>
* </para>
* </example>
* <section id="gtkfilechooserdialog-setting-up">
* <title>Setting up a file chooser dialog</title>
* There are various cases in which you may need to use a #GtkFileChooserDialog:
* <itemizedlist><listitem>To select a file for opening, as for a
* <guimenuitem>File/Open</guimenuitem> command. Use
* #GTK_FILE_CHOOSER_ACTION_OPEN.
* </listitem>
* <listitem>To save a file for the first time, as for a
* <guimenuitem>File/Save</guimenuitem> command. Use
* #GTK_FILE_CHOOSER_ACTION_SAVE, and suggest a name such as
* "Untitled" with gtk_file_chooser_set_current_name().
* </listitem>
* <listitem>To save a file under a different name, as for a
* <guimenuitem>File/Save As</guimenuitem> command. Use
* #GTK_FILE_CHOOSER_ACTION_SAVE, and set the existing filename
* with gtk_file_chooser_set_filename().
* </listitem>
* <listitem>To choose a folder instead of a file. Use
* #GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER.
* </listitem></itemizedlist>
* <note>
* <para>
* Old versions of the file chooser's documentation suggested
* using gtk_file_chooser_set_current_folder() in various
* situations, with the intention of letting the application
* suggest a reasonable default folder. This is no longer
* considered to be a good policy, as now the file chooser is
* able to make good suggestions on its own. In general, you
* should only cause the file chooser to show a specific folder
* when it is appropriate to use gtk_file_chooser_set_filename(),
* i.e. when you are doing a <guimenuitem>File/Save
* As</guimenuitem> command <emphasis>and</emphasis> you already
* have a file saved somewhere.
* </para>
* </note>
* </section>
* <section id="gtkfilechooserdialog-response-codes">
* <title>Response Codes</title>
* #GtkFileChooserDialog inherits from #GtkDialog, so buttons that
* go in its action area have response codes such as
* #GTK_RESPONSE_ACCEPT and #GTK_RESPONSE_CANCEL. For example, you
* could call gtk_file_chooser_dialog_new() as follows:
* <para>
* <informalexample><programlisting>
* GtkWidget *dialog;
*
* dialog = gtk_file_chooser_dialog_new ("Open File",
* parent_window,
* GTK_FILE_CHOOSER_ACTION_OPEN,
* GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
* GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
* NULL);
* </programlisting></informalexample>
* </para>
* This will create buttons for "Cancel" and "Open" that use stock
* response identifiers from #GtkResponseType. For most dialog
* boxes you can use your own custom response codes rather than the
* ones in #GtkResponseType, but #GtkFileChooserDialog assumes that
* its "accept"-type action, e.g. an "Open" or "Save" button,
* <emphasis>will</emphasis> have one of the following response
* codes:
* <para>
* <simplelist id="gtkfilechooserdialog-responses">
* <member>#GTK_RESPONSE_ACCEPT</member>
* <member>#GTK_RESPONSE_OK</member>
* <member>#GTK_RESPONSE_YES</member>
* <member>#GTK_RESPONSE_APPLY</member>
* </simplelist>
* </para>
* This is because #GtkFileChooserDialog must intercept responses
* and switch to folders if appropriate, rather than letting the
* dialog terminate &mdash; the implementation uses these known
* response codes to know which responses can be blocked if
* appropriate.
* <para>
* <note>
* To summarize, make sure you use a
* <link linkend="gtkfilechooserdialog-responses">stock response code</link>
* when you use #GtkFileChooserDialog to ensure proper operation.
* </note>
* </para>
* </section>
*/
#define GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE(o) (GTK_FILE_CHOOSER_DIALOG (o)->priv)
static void gtk_file_chooser_dialog_finalize (GObject *object);
static GObject* gtk_file_chooser_dialog_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params);
static void gtk_file_chooser_dialog_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_file_chooser_dialog_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_file_chooser_dialog_map (GtkWidget *widget);
static void response_cb (GtkDialog *dialog,
gint response_id);
G_DEFINE_TYPE_WITH_CODE (GtkFileChooserDialog, gtk_file_chooser_dialog, GTK_TYPE_DIALOG,
G_IMPLEMENT_INTERFACE (GTK_TYPE_FILE_CHOOSER,
_gtk_file_chooser_delegate_iface_init))
static void
gtk_file_chooser_dialog_class_init (GtkFileChooserDialogClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
gobject_class->constructor = gtk_file_chooser_dialog_constructor;
gobject_class->set_property = gtk_file_chooser_dialog_set_property;
gobject_class->get_property = gtk_file_chooser_dialog_get_property;
gobject_class->finalize = gtk_file_chooser_dialog_finalize;
widget_class->map = gtk_file_chooser_dialog_map;
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_FILE_CHOOSER);
_gtk_file_chooser_install_properties (gobject_class);
g_type_class_add_private (class, sizeof (GtkFileChooserDialogPrivate));
}
static void
gtk_file_chooser_dialog_init (GtkFileChooserDialog *dialog)
{
GtkWidget *action_area, *content_area;
GtkFileChooserDialogPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE (dialog,
GTK_TYPE_FILE_CHOOSER_DIALOG,
GtkFileChooserDialogPrivate);
GtkDialog *fc_dialog = GTK_DIALOG (dialog);
dialog->priv = priv;
dialog->priv->response_requested = FALSE;
content_area = gtk_dialog_get_content_area (fc_dialog);
action_area = gtk_dialog_get_action_area (fc_dialog);
gtk_container_set_border_width (GTK_CONTAINER (fc_dialog), 5);
gtk_box_set_spacing (GTK_BOX (content_area), 2); /* 2 * 5 + 2 = 12 */
gtk_container_set_border_width (GTK_CONTAINER (action_area), 5);
/* We do a signal connection here rather than overriding the method in
* class_init because GtkDialog::response is a RUN_LAST signal. We want *our*
* handler to be run *first*, regardless of whether the user installs response
* handlers of his own.
*/
g_signal_connect (dialog, "response",
G_CALLBACK (response_cb), NULL);
}
static void
gtk_file_chooser_dialog_finalize (GObject *object)
{
GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (object);
g_free (dialog->priv->file_system);
G_OBJECT_CLASS (gtk_file_chooser_dialog_parent_class)->finalize (object);
}
static gboolean
is_stock_accept_response_id (int response_id)
{
return (response_id == GTK_RESPONSE_ACCEPT
|| response_id == GTK_RESPONSE_OK
|| response_id == GTK_RESPONSE_YES
|| response_id == GTK_RESPONSE_APPLY);
}
/* Callback used when the user activates a file in the file chooser widget */
static void
file_chooser_widget_file_activated (GtkFileChooser *chooser,
GtkFileChooserDialog *dialog)
{
GtkDialog *fc_dialog = GTK_DIALOG (dialog);
GtkWidget *action_area;
GList *children, *l;
if (gtk_window_activate_default (GTK_WINDOW (dialog)))
return;
/* There probably isn't a default widget, so make things easier for the
* programmer by looking for a reasonable button on our own.
*/
action_area = gtk_dialog_get_action_area (fc_dialog);
children = gtk_container_get_children (GTK_CONTAINER (action_area));
for (l = children; l; l = l->next)
{
GtkWidget *widget;
int response_id;
widget = GTK_WIDGET (l->data);
response_id = gtk_dialog_get_response_for_widget (fc_dialog, widget);
if (gtk_widget_is_sensitive (widget) &&
is_stock_accept_response_id (response_id))
{
gtk_widget_activate (widget); /* Should we gtk_dialog_response (dialog, response_id) instead? */
break;
}
}
g_list_free (children);
}
#if 0
/* FIXME: to see why this function is ifdef-ed out, see the comment below in
* file_chooser_widget_default_size_changed().
*/
static void
load_position (int *out_xpos, int *out_ypos)
{
GtkFileChooserSettings *settings;
int x, y, width, height;
settings = _gtk_file_chooser_settings_new ();
_gtk_file_chooser_settings_get_geometry (settings, &x, &y, &width, &height);
g_object_unref (settings);
*out_xpos = x;
*out_ypos = y;
}
#endif
static void
file_chooser_widget_default_size_changed (GtkWidget *widget,
GtkFileChooserDialog *dialog)
{
GtkFileChooserDialogPrivate *priv;
gint default_width, default_height;
GtkRequisition req, widget_req;
priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
/* Unset any previously set size */
gtk_widget_set_size_request (GTK_WIDGET (dialog), -1, -1);
if (gtk_widget_is_drawable (widget))
{
/* Force a size request of everything before we start. This will make sure
* that widget->requisition is meaningful. */
gtk_widget_get_preferred_size (GTK_WIDGET (dialog),
&req, NULL);
gtk_widget_get_preferred_size (widget,
&widget_req, NULL);
}
_gtk_file_chooser_embed_get_default_size (GTK_FILE_CHOOSER_EMBED (priv->widget),
&default_width, &default_height);
gtk_window_resize (GTK_WINDOW (dialog), default_width, default_height);
if (!gtk_widget_get_mapped (GTK_WIDGET (dialog)))
{
#if 0
/* FIXME: the code to restore the position does not work yet. It is not
* clear whether it is actually desirable --- if enabled, applications
* would not be able to say "center the file chooser on top of my toplevel
* window". So, we don't use this code at all.
*/
load_position (&xpos, &ypos);
if (xpos >= 0 && ypos >= 0)
{
gtk_window_set_position (GTK_WINDOW (dialog), GTK_WIN_POS_NONE);
gtk_window_move (GTK_WINDOW (dialog), xpos, ypos);
}
#endif
}
}
static void
file_chooser_widget_response_requested (GtkWidget *widget,
GtkFileChooserDialog *dialog)
{
GtkDialog *fc_dialog = GTK_DIALOG (dialog);
GtkWidget *action_area;
GList *children, *l;
dialog->priv->response_requested = TRUE;
if (gtk_window_activate_default (GTK_WINDOW (dialog)))
return;
/* There probably isn't a default widget, so make things easier for the
* programmer by looking for a reasonable button on our own.
*/
action_area = gtk_dialog_get_action_area (fc_dialog);
children = gtk_container_get_children (GTK_CONTAINER (action_area));
for (l = children; l; l = l->next)
{
GtkWidget *widget;
int response_id;
widget = GTK_WIDGET (l->data);
response_id = gtk_dialog_get_response_for_widget (fc_dialog, widget);
if (gtk_widget_is_sensitive (widget) &&
is_stock_accept_response_id (response_id))
{
gtk_widget_activate (widget); /* Should we gtk_dialog_response (dialog, response_id) instead? */
break;
}
}
if (l == NULL)
dialog->priv->response_requested = FALSE;
g_list_free (children);
}
static GObject*
gtk_file_chooser_dialog_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params)
{
GtkFileChooserDialogPrivate *priv;
GtkWidget *content_area;
GObject *object;
object = G_OBJECT_CLASS (gtk_file_chooser_dialog_parent_class)->constructor (type,
n_construct_properties,
construct_params);
priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
gtk_widget_push_composite_child ();
if (priv->file_system)
priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET,
NULL);
else
priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET, NULL);
g_signal_connect (priv->widget, "file-activated",
G_CALLBACK (file_chooser_widget_file_activated), object);
g_signal_connect (priv->widget, "default-size-changed",
G_CALLBACK (file_chooser_widget_default_size_changed), object);
g_signal_connect (priv->widget, "response-requested",
G_CALLBACK (file_chooser_widget_response_requested), object);
content_area = gtk_dialog_get_content_area (GTK_DIALOG (object));
gtk_container_set_border_width (GTK_CONTAINER (priv->widget), 5);
gtk_box_pack_start (GTK_BOX (content_area), priv->widget, TRUE, TRUE, 0);
gtk_widget_show (priv->widget);
_gtk_file_chooser_set_delegate (GTK_FILE_CHOOSER (object),
GTK_FILE_CHOOSER (priv->widget));
gtk_widget_pop_composite_child ();
return object;
}
static void
gtk_file_chooser_dialog_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
switch (prop_id)
{
default:
g_object_set_property (G_OBJECT (priv->widget), pspec->name, value);
break;
}
}
static void
gtk_file_chooser_dialog_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
g_object_get_property (G_OBJECT (priv->widget), pspec->name, value);
}
static void
foreach_ensure_default_response_cb (GtkWidget *widget,
gpointer data)
{
GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (data);
int response_id;
response_id = gtk_dialog_get_response_for_widget (GTK_DIALOG (dialog), widget);
if (is_stock_accept_response_id (response_id))
gtk_dialog_set_default_response (GTK_DIALOG (dialog), response_id);
}
static void
ensure_default_response (GtkFileChooserDialog *dialog)
{
GtkWidget *action_area;
action_area = gtk_dialog_get_action_area (GTK_DIALOG (dialog));
gtk_container_foreach (GTK_CONTAINER (action_area),
foreach_ensure_default_response_cb,
dialog);
}
/* GtkWidget::map handler */
static void
gtk_file_chooser_dialog_map (GtkWidget *widget)
{
GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (widget);
GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
ensure_default_response (dialog);
_gtk_file_chooser_embed_initial_focus (GTK_FILE_CHOOSER_EMBED (priv->widget));
GTK_WIDGET_CLASS (gtk_file_chooser_dialog_parent_class)->map (widget);
}
/* GtkDialog::response handler */
static void
response_cb (GtkDialog *dialog,
gint response_id)
{
GtkFileChooserDialogPrivate *priv;
priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
/* Act only on response IDs we recognize */
if (is_stock_accept_response_id (response_id)
&& !priv->response_requested
&& !_gtk_file_chooser_embed_should_respond (GTK_FILE_CHOOSER_EMBED (priv->widget)))
{
g_signal_stop_emission_by_name (dialog, "response");
}
priv->response_requested = FALSE;
}
static GtkWidget *
gtk_file_chooser_dialog_new_valist (const gchar *title,
GtkWindow *parent,
GtkFileChooserAction action,
const gchar *first_button_text,
va_list varargs)
{
GtkWidget *result;
const char *button_text = first_button_text;
gint response_id;
result = g_object_new (GTK_TYPE_FILE_CHOOSER_DIALOG,
"title", title,
"action", action,
NULL);
if (parent)
gtk_window_set_transient_for (GTK_WINDOW (result), parent);
while (button_text)
{
response_id = va_arg (varargs, gint);
gtk_dialog_add_button (GTK_DIALOG (result), button_text, response_id);
button_text = va_arg (varargs, const gchar *);
}
return result;
}
/**
* gtk_file_chooser_dialog_new:
* @title: (allow-none): Title of the dialog, or %NULL
* @parent: (allow-none): Transient parent of the dialog, or %NULL
* @action: Open or save mode for the dialog
* @first_button_text: (allow-none): stock ID or text to go in the first button, or %NULL
* @...: response ID for the first button, then additional (button, id) pairs, ending with %NULL
*
* Creates a new #GtkFileChooserDialog. This function is analogous to
* gtk_dialog_new_with_buttons().
*
* Return value: a new #GtkFileChooserDialog
*
* Since: 2.4
**/
GtkWidget *
gtk_file_chooser_dialog_new (const gchar *title,
GtkWindow *parent,
GtkFileChooserAction action,
const gchar *first_button_text,
...)
{
GtkWidget *result;
va_list varargs;
va_start (varargs, first_button_text);
result = gtk_file_chooser_dialog_new_valist (title, parent, action,
first_button_text,
varargs);
va_end (varargs);
return result;
}
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