gtkfilechooser.sgml 11 KB
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<!-- ##### SECTION Title ##### -->
GtkFileChooser

<!-- ##### SECTION Short_Description ##### -->
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File chooser interface used by #GtkFileChooserWidget and #GtkFileChooserDialog.
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<!-- ##### SECTION Long_Description ##### -->
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    <para>
      #GtkFileChooser is an interface that can be implemented by file
      selection widgets.  In GTK+, the main objects that implement
      this interface are #GtkFileChooserWidget and
      #GtkFileChooserDialog.  You do not need to write an object that
      implements the #GtkFileChooser interface unless you are trying
      to adapt an existing file selector to expose a standard
      programming interface.
    </para>
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    <refsect2 id="gtkfilechooser-preview">
      <title>Adding a Preview Widget</title>

      <para>
	You can add a custom preview widget to a file chooser and then
	get notification about when the preview needs to be updated.
	To install a preview widget, use
	gtk_file_chooser_set_preview_widget().  Then, connect to the
	#GtkFileChooser::update-preview signal to get notified when
	you need to update the contents of the preview.
      </para>

      <para>
	Your callback should use
	gtk_file_chooser_get_preview_filename() to see what needs
	previewing.  Once you have generated the preview for the
	corresponding file, you must call
	gtk_file_chooser_set_preview_widget_active() with a boolean
	flag that indicates whether your callback could successfully
	generate a preview.
      </para>

      <example id="example-gtkfilechooser-preview">
	<title>Sample Usage</title>

	<programlisting>
{
  GtkImage *preview;

  ...

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  preview = gtk_image_new (<!-- -->);
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  gtk_file_chooser_set_preview_widget (my_file_chooser, preview);
  g_signal_connect (my_file_chooser, "update-preview",
		    G_CALLBACK (update_preview_cb), preview);
}

static void
update_preview_cb (GtkFileChooser *file_chooser, gpointer data)
{
  GtkWidget *preview;
  char *filename;
  GdkPixbuf *pixbuf;
  gboolean have_preview;

  preview = GTK_WIDGET (data);
  filename = gtk_file_chooser_get_preview_filename (file_chooser);

  pixbuf = gdk_pixbuf_new_from_file_at_size (filename, 128, 128, NULL);
  have_preview = (pixbuf != NULL);
  g_free (filename);

  gtk_image_set_from_pixbuf (GTK_IMAGE (preview), pixbuf);
  if (pixbuf)
    gdk_pixbuf_unref (pixbuf);

  gtk_file_chooser_set_preview_widget_active (file_chooser, have_preview);
}
	</programlisting>
      </example>
    </refsect2>

    <refsect2 id="gtkfilechooser-extra">
      <title>Adding Extra Widgets</title>

      <para>
	You can add extra widgets to a file chooser to provide options
	that are not present in the default design.  For example, you
	can add a toggle button to give the user the option to open a
	file in read-only mode.  You can use
	gtk_file_chooser_set_extra_widget() to insert additional
	widgets in a file chooser.
      </para>

      <example id="example-gtkfilechooser-extra">
	<title>Sample Usage</title>

	<programlisting>
{
  GtkWidget *toggle;

  ...

  toggle = gtk_check_button_new_with_label ("Open file read-only");
  gtk_widget_show (toggle);
  gtk_file_chooser_set_extra_widget (my_file_chooser, toggle);
}
	</programlisting>
      </example>

      <note>
	<para>
	  If you want to set more than one extra widget in the file
	  chooser, you can a container such as a GtkVBox or a GtkTable
	  and include your widgets in it.  Then, set the container as
	  the whole extra widget.
	</para>
      </note>
    </refsect2>

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<!-- ##### SECTION See_Also ##### -->
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    <para>
      #GtkFileChooserDialog, #GtkFileChooserWidget
    </para>
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<!-- ##### STRUCT GtkFileChooser ##### -->
<para>

</para>


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<!-- ##### SIGNAL GtkFileChooser::current-folder-changed ##### -->
<para>

</para>

@filechooser: the object which received the signal.

<!-- ##### SIGNAL GtkFileChooser::file-activated ##### -->
<para>

</para>

@filechooser: the object which received the signal.

<!-- ##### SIGNAL GtkFileChooser::selection-changed ##### -->
<para>

</para>

@filechooser: the object which received the signal.

<!-- ##### SIGNAL GtkFileChooser::update-preview ##### -->
<para>

</para>

@filechooser: the object which received the signal.

<!-- ##### ARG GtkFileChooser:action ##### -->
<para>

</para>

<!-- ##### ARG GtkFileChooser:extra-widget ##### -->
<para>

</para>

<!-- ##### ARG GtkFileChooser:file-system-backend ##### -->
<para>

</para>

<!-- ##### ARG GtkFileChooser:filter ##### -->
<para>

</para>

<!-- ##### ARG GtkFileChooser:local-only ##### -->
<para>

</para>

<!-- ##### ARG GtkFileChooser:preview-widget ##### -->
<para>

</para>

<!-- ##### ARG GtkFileChooser:preview-widget-active ##### -->
<para>

</para>

<!-- ##### ARG GtkFileChooser:select-multiple ##### -->
<para>

</para>

<!-- ##### ARG GtkFileChooser:show-hidden ##### -->
<para>

</para>

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<!-- ##### ARG GtkFileChooser:use-preview-label ##### -->
<para>

</para>

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<!-- ##### ENUM GtkFileChooserAction ##### -->
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    <para>
      Describes whether a #GtkFileChooser is being used to open
      existing files or to save to a possibly new file.
    </para>
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@GTK_FILE_CHOOSER_ACTION_OPEN: Indicates open mode.  The file chooser
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    will only let the user pick an existing file.
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@GTK_FILE_CHOOSER_ACTION_SAVE: Indicates save mode.  The file chooser
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    will let the user pick an existing file, or type in a new
    filename.
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@GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER: Indicates an Open mode for
    selecting folders.  The file chooser will let the user pick an
    existing folder.
@GTK_FILE_CHOOSER_ACTION_CREATE_FOLDER: Indicates a mode for creating a
    new folder.  The file chooser will let the user name an existing or
    new folder.
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<!-- ##### MACRO GTK_FILE_CHOOSER_ERROR ##### -->
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    <para>
      Used to get the #GError quark for #GtkFileChooser errors.
    </para>
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<!-- ##### ENUM GtkFileChooserError ##### -->
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    <para>
      These identify the various errors that can occur while calling
      #GtkFileChooser functions.
    </para>
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@GTK_FILE_CHOOSER_ERROR_NONEXISTENT: Indicates that a file does not exist.
@GTK_FILE_CHOOSER_ERROR_BAD_FILENAME: Indicates a malformed filename.
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<!-- ##### FUNCTION gtk_file_chooser_error_quark ##### -->
<para>

</para>

@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_action ##### -->
<para>

</para>

@chooser: 
@action: 


<!-- ##### FUNCTION gtk_file_chooser_get_action ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_local_only ##### -->
<para>

</para>

@chooser: 
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@local_only: 
<!-- # Unused Parameters # -->
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@files_only: 


<!-- ##### FUNCTION gtk_file_chooser_get_local_only ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_select_multiple ##### -->
<para>

</para>

@chooser: 
@select_multiple: 


<!-- ##### FUNCTION gtk_file_chooser_get_select_multiple ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_current_name ##### -->
<para>

</para>

@chooser: 
@name: 


<!-- ##### FUNCTION gtk_file_chooser_get_filename ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_filename ##### -->
<para>

</para>

@chooser: 
@filename: 
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@Returns: 
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<!-- ##### FUNCTION gtk_file_chooser_select_filename ##### -->
<para>

</para>

@chooser: 
@filename: 
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@Returns: 
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<!-- ##### FUNCTION gtk_file_chooser_unselect_filename ##### -->
<para>

</para>

@chooser: 
@filename: 


<!-- ##### FUNCTION gtk_file_chooser_select_all ##### -->
<para>

</para>

@chooser: 


<!-- ##### FUNCTION gtk_file_chooser_unselect_all ##### -->
<para>

</para>

@chooser: 


<!-- ##### FUNCTION gtk_file_chooser_get_filenames ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_current_folder ##### -->
<para>

</para>

@chooser: 
@filename: 
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@Returns: 
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<!-- ##### FUNCTION gtk_file_chooser_get_current_folder ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_get_uri ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_uri ##### -->
<para>

</para>

@chooser: 
@uri: 
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@Returns: 
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<!-- ##### FUNCTION gtk_file_chooser_select_uri ##### -->
<para>

</para>

@chooser: 
@uri: 
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@Returns: 
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<!-- ##### FUNCTION gtk_file_chooser_unselect_uri ##### -->
<para>

</para>

@chooser: 
@uri: 


<!-- ##### FUNCTION gtk_file_chooser_get_uris ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_current_folder_uri ##### -->
<para>

</para>

@chooser: 
@uri: 
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@Returns: 
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<!-- ##### FUNCTION gtk_file_chooser_get_current_folder_uri ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_preview_widget ##### -->
<para>

</para>

@chooser: 
@preview_widget: 


<!-- ##### FUNCTION gtk_file_chooser_get_preview_widget ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_preview_widget_active ##### -->
<para>

</para>

@chooser: 
@active: 


<!-- ##### FUNCTION gtk_file_chooser_get_preview_widget_active ##### -->
<para>

</para>

@chooser: 
@Returns: 


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<!-- ##### FUNCTION gtk_file_chooser_set_use_preview_label ##### -->
<para>

</para>

@chooser: 
@use_label: 


<!-- ##### FUNCTION gtk_file_chooser_get_use_preview_label ##### -->
<para>

</para>

@chooser: 
@Returns: 


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<!-- ##### FUNCTION gtk_file_chooser_get_preview_filename ##### -->
<para>

</para>

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@chooser: 
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@Returns: 
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<!-- # Unused Parameters # -->
@file_chooser: 
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<!-- ##### FUNCTION gtk_file_chooser_get_preview_uri ##### -->
<para>

</para>

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@chooser: 
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@Returns: 
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<!-- # Unused Parameters # -->
@file_chooser: 
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<!-- ##### FUNCTION gtk_file_chooser_set_extra_widget ##### -->
<para>

</para>

@chooser: 
@extra_widget: 


<!-- ##### FUNCTION gtk_file_chooser_get_extra_widget ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_add_filter ##### -->
<para>

</para>

@chooser: 
@filter: 


<!-- ##### FUNCTION gtk_file_chooser_remove_filter ##### -->
<para>

</para>

@chooser: 
@filter: 


<!-- ##### FUNCTION gtk_file_chooser_list_filters ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_set_filter ##### -->
<para>

</para>

@chooser: 
@filter: 


<!-- ##### FUNCTION gtk_file_chooser_get_filter ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_add_shortcut_folder ##### -->
<para>

</para>

@chooser: 
@folder: 
@error: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_remove_shortcut_folder ##### -->
<para>

</para>

@chooser: 
@folder: 
@error: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_list_shortcut_folders ##### -->
<para>

</para>

@chooser: 
@Returns: 


<!-- ##### FUNCTION gtk_file_chooser_add_shortcut_folder_uri ##### -->
<para>

</para>

@chooser: 
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@uri: 
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@error: 
@Returns: 
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<!-- # Unused Parameters # -->
@folder: 
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<!-- ##### FUNCTION gtk_file_chooser_remove_shortcut_folder_uri ##### -->
<para>

</para>

@chooser: 
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@uri: 
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@error: 
@Returns: 
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<!-- # Unused Parameters # -->
@folder: 
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<!-- ##### FUNCTION gtk_file_chooser_list_shortcut_folder_uris ##### -->
<para>

</para>

@chooser: 
@Returns: 


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<!--
Local variables:
mode: sgml
sgml-parent-document: ("../gtk-docs.sgml" "book" "refentry")
End:
-->