2.13.5

[~andy/gtk] / docs / reference / gtk / tmpl / gtkdialog.sgml

<!-- ##### SECTION Title ##### -->
GtkDialog

<!-- ##### SECTION Short_Description ##### -->
Create popup windows

<!-- ##### SECTION Long_Description ##### -->

<para>
Dialog boxes are a convenient way to prompt the user for a small amount of
input, e.g. to display a message, ask a question, or anything else that does 
not require extensive effort on the user's part.
</para>

<para>
GTK+ treats a dialog as a window split vertically. The top section is a
#GtkVBox, and is where widgets such as a #GtkLabel or a #GtkEntry should
be packed. The bottom area is known as the
<structfield>action_area</structfield>. This is generally used for
packing buttons into the dialog which may perform functions such as
cancel, ok, or apply. The two areas are separated by a #GtkHSeparator.
</para>

<para>
#GtkDialog boxes are created with a call to gtk_dialog_new() or
gtk_dialog_new_with_buttons(). gtk_dialog_new_with_buttons() is recommended; it
allows you to set the dialog title, some convenient flags, and add simple
buttons.
</para>

<para>
If 'dialog' is a newly created dialog, the two primary areas of the window 
can be accessed through gtk_dialog_get_content_area() and
gtk_dialog_get_action_area(), as can be seen from the example, below.
</para>

<para>
A 'modal' dialog (that is, one which freezes the rest of the application from
user input), can be created by calling gtk_window_set_modal() on the dialog. Use
the GTK_WINDOW() macro to cast the widget returned from gtk_dialog_new() into a
#GtkWindow. When using gtk_dialog_new_with_buttons() you can also pass the
#GTK_DIALOG_MODAL flag to make a dialog modal.
</para>

<para>
If you add buttons to #GtkDialog using gtk_dialog_new_with_buttons(),
gtk_dialog_add_button(), gtk_dialog_add_buttons(), or
gtk_dialog_add_action_widget(), clicking the button will emit a signal called
"response" with a response ID that you specified. GTK+ will never assign a
meaning to positive response IDs; these are entirely user-defined. But for
convenience, you can use the response IDs in the #GtkResponseType enumeration
(these all have values less than zero). If a dialog receives a delete event, 
the "response" signal will be emitted with a response ID of #GTK_RESPONSE_DELETE_EVENT.
</para>


<para>
If you want to block waiting for a dialog to return before returning control
flow to your code, you can call gtk_dialog_run(). This function enters a
recursive main loop and waits for the user to respond to the dialog, returning the 
response ID corresponding to the button the user clicked.
</para>

<para>
For the simple dialog in the following example, in reality you'd probably use
#GtkMessageDialog to save yourself some effort.  But you'd need to create the
dialog contents manually if you had more than a simple message in the dialog.
<example>
<title>Simple <structname>GtkDialog</structname> usage.</title>
<programlisting>

/* Function to open a dialog box displaying the message provided. */

void quick_message (gchar *message) {

   GtkWidget *dialog, *label, *content_area;
   
   /* Create the widgets */
   
   dialog = gtk_dialog_new_with_buttons ("Message",
                                         main_application_window,
                                         GTK_DIALOG_DESTROY_WITH_PARENT,
                                         GTK_STOCK_OK,
                                         GTK_RESPONSE_NONE,
                                         NULL);
   content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
   label = gtk_label_new (message);
   
   /* Ensure that the dialog box is destroyed when the user responds. */
   
   g_signal_connect_swapped (dialog,
                             "response", 
                             G_CALLBACK (gtk_widget_destroy),
                             dialog);

   /* Add the label, and show everything we've added to the dialog. */

   gtk_container_add (GTK_CONTAINER (content_area), label);
   gtk_widget_show_all (dialog);
}

</programlisting>
</example>
</para>

<refsect2 id="GtkDialog-BUILDER-UI"><title>GtkDialog as GtkBuildable</title>
<para>
The GtkDialog implementation of the GtkBuildable interface exposes the 
@vbox and @action_area as internal children with the names "vbox" and 
"action_area".
</para>
<para>
GtkDialog supports a custom &lt;action-widgets&gt; element, which 
can contain multiple &lt;action-widget&gt; elements. The "response"
attribute specifies a numeric response, and the content of the element
is the id of widget (which should be a child of the dialogs @action_area).
</para>
<example>
<title>A <structname>GtkDialog</structname> UI definition fragment.</title>
<programlisting><![CDATA[
<object class="GtkDialog" id="dialog1">
  <child internal-child="vbox">"
    <object class="GtkVBox">
      <child internal-child="action_area">
        <object class="GtkHButtonBox">
          <child>
            <object class="GtkButton" id="button_cancel"/>
          </child>
          <child>
            <object class="GtkButton" id="button_ok"/>
          </child>
        </object>
      </child>
    </object>
  </child>
  <action-widgets>
    <action-widget response="3">button_ok</action-widget>
    <action-widget response="-5">button_cancel</action-widget>
  </action-widgets>
</object>
]]></programlisting>
</example>
</refsect2>

<!-- ##### SECTION See_Also ##### -->

<para>
<variablelist>
<varlistentry>
<term>#GtkVBox</term>
<listitem><para>Pack widgets vertically.</para></listitem>
</varlistentry>
<varlistentry>
<term>#GtkWindow</term>
<listitem><para>Alter the properties of your dialog box.</para></listitem>
</varlistentry>
<varlistentry>
<term>#GtkButton</term>
<listitem><para>Add them to the <structfield>action_area</structfield> to get a
response from the user.</para></listitem>
</varlistentry>
</variablelist>
</para>

<!-- ##### SECTION Stability_Level ##### -->


<!-- ##### STRUCT GtkDialog ##### -->
<para>
<structfield>vbox</structfield> is a #GtkVBox - the main part of the
dialog box.
</para>

<para>
<structfield>action_area</structfield> is a #GtkHButtonBox packed below the
dividing #GtkHSeparator in the dialog. It is treated exactly the same
as any other #GtkHButtonBox.
</para>


<!-- ##### SIGNAL GtkDialog::close ##### -->
<para>

</para>

@dialog: the object which received the signal.

<!-- ##### SIGNAL GtkDialog::response ##### -->
<para>

</para>

@dialog: 
@arg1: 

<!-- ##### ARG GtkDialog:has-separator ##### -->
<para>

</para>

<!-- ##### ARG GtkDialog:action-area-border ##### -->
<para>

</para>

<!-- ##### ARG GtkDialog:button-spacing ##### -->
<para>

</para>

<!-- ##### ARG GtkDialog:content-area-border ##### -->
<para>

</para>

<!-- ##### ENUM GtkDialogFlags ##### -->
<para>
Flags used to influence dialog construction.
</para>

@GTK_DIALOG_MODAL: Make the constructed dialog modal, 
  see gtk_window_set_modal().
@GTK_DIALOG_DESTROY_WITH_PARENT: Destroy the dialog when its
  parent is destroyed, see gtk_window_set_destroy_with_parent().
@GTK_DIALOG_NO_SEPARATOR: Don't put a separator between the
  action area and the dialog content.

<!-- ##### ENUM GtkResponseType ##### -->
<para>
Predefined values for use as response ids in gtk_dialog_add_button().
All predefined values are negative, GTK+ leaves positive values for
application-defined response ids. 
</para>

@GTK_RESPONSE_NONE: Returned if an action widget has no response id, or if 
   the dialog gets programmatically hidden or destroyed.
@GTK_RESPONSE_REJECT: Generic response id, not used by GTK+ dialogs.
@GTK_RESPONSE_ACCEPT: Generic response id, not used by GTK+ dialogs.
@GTK_RESPONSE_DELETE_EVENT: Returned if the dialog is deleted.
@GTK_RESPONSE_OK: Returned by OK buttons in GTK+ dialogs.
@GTK_RESPONSE_CANCEL: Returned by Cancel buttons in GTK+ dialogs.
@GTK_RESPONSE_CLOSE: Returned by Close buttons in GTK+ dialogs.
@GTK_RESPONSE_YES: Returned by Yes buttons in GTK+ dialogs.
@GTK_RESPONSE_NO: Returned by No buttons in GTK+ dialogs.
@GTK_RESPONSE_APPLY: Returned by Apply buttons in GTK+ dialogs.
@GTK_RESPONSE_HELP: Returned by Help buttons in GTK+ dialogs.

<!-- ##### FUNCTION gtk_dialog_new ##### -->
<para>
Creates a new dialog box. Widgets should not be packed into this #GtkWindow
directly, but into the @vbox and @action_area, as described above. 
</para>

@Returns: a new #GtkDialog.


<!-- ##### FUNCTION gtk_dialog_new_with_buttons ##### -->
<para>

</para>

@title: 
@parent: 
@flags: 
@first_button_text: 
@Varargs: 
@Returns: 


<!-- ##### FUNCTION gtk_dialog_run ##### -->
<para>

</para>

@dialog: 
@Returns: 


<!-- ##### FUNCTION gtk_dialog_response ##### -->
<para>

</para>

@dialog: 
@response_id: 


<!-- ##### FUNCTION gtk_dialog_add_button ##### -->
<para>

</para>

@dialog: 
@button_text: 
@response_id: 
@Returns: 


<!-- ##### FUNCTION gtk_dialog_add_buttons ##### -->
<para>

</para>

@dialog: 
@first_button_text: 
@Varargs: 


<!-- ##### FUNCTION gtk_dialog_add_action_widget ##### -->
<para>

</para>

@dialog: 
@child: 
@response_id: 


<!-- ##### FUNCTION gtk_dialog_get_has_separator ##### -->
<para>

</para>

@dialog: 
@Returns: 


<!-- ##### FUNCTION gtk_dialog_set_default_response ##### -->
<para>

</para>

@dialog: 
@response_id: 


<!-- ##### FUNCTION gtk_dialog_set_has_separator ##### -->
<para>

</para>

@dialog: 
@setting: 


<!-- ##### FUNCTION gtk_dialog_set_response_sensitive ##### -->
<para>

</para>

@dialog: 
@response_id: 
@setting: 


<!-- ##### FUNCTION gtk_dialog_get_response_for_widget ##### -->
<para>

</para>

@dialog: 
@widget: 
@Returns: 


<!-- ##### FUNCTION gtk_dialog_get_action_area ##### -->
<para>

</para>

@dialog: 
@Returns: 


<!-- ##### FUNCTION gtk_dialog_get_content_area ##### -->
<para>

</para>

@dialog: 
@Returns: 


<!-- ##### FUNCTION gtk_alternative_dialog_button_order ##### -->
<para>

</para>

@screen: 
@Returns: 


<!-- ##### FUNCTION gtk_dialog_set_alternative_button_order ##### -->
<para>

</para>

@dialog: 
@first_response_id: 
@Varargs: 


<!-- ##### FUNCTION gtk_dialog_set_alternative_button_order_from_array ##### -->
<para>

</para>

@dialog: 
@n_params: 
@new_order: