adw.alert_dialog

A dialog presenting a message or a question.

Alert dialogs have a heading, a body, an optional child widget, and one or multiple responses, each presented as a button.

Each response has a unique string ID, and a button label. Additionally, each response can be enabled or disabled, and can have a suggested or destructive appearance.

When one of the responses is activated, or the dialog is closed, the signal@AlertDialog::response signal will be emitted. This signal is detailed, and the detail, as well as the response parameter will be set to the ID of the activated response, or to the value of the property@AlertDialog:close-response property if the dialog had been closed without activating any of the responses.

Response buttons can be presented horizontally or vertically depending on available space.

When a response is activated, [adw.alert_dialog.AlertDialog] is closed automatically.

An example of using an alert dialog:

AdwDialog *dialog;

dialog = adw_alert_dialog_new (_("Replace File?"), NULL);

adw_alert_dialog_format_body (ADW_ALERT_DIALOG (dialog),
                             _("A file named “%s” already exists. Do you want to replace it?"),
                             filename);

adw_alert_dialog_add_responses (ADW_ALERT_DIALOG (dialog),
                               "cancel",  _("_Cancel"),
                               "replace", _("_Replace"),
                               NULL);

adw_alert_dialog_set_response_appearance (ADW_ALERT_DIALOG (dialog),
                                         "replace",
                                         ADW_RESPONSE_DESTRUCTIVE);

adw_alert_dialog_set_default_response (ADW_ALERT_DIALOG (dialog), "cancel");
adw_alert_dialog_set_close_response (ADW_ALERT_DIALOG (dialog), "cancel");

g_signal_connect (dialog, "response", G_CALLBACK (response_cb), self);

adw_dialog_present (dialog, parent);

Async API

[adw.alert_dialog.AlertDialog] can also be used via the [adw.alert_dialog.AlertDialog.choose] method. This API follows the GIO async pattern, and the result can be obtained by calling [adw.alert_dialog.AlertDialog.chooseFinish], for example:

static void
dialog_cb (AdwAlertDialog *dialog,
          GAsyncResult   *result,
          MyWindow       *self)
{
 const char *response = adw_alert_dialog_choose_finish (dialog, result);

 // ...
}

static void
show_dialog (MyWindow *self)
{
 AdwDialog *dialog;

 dialog = adw_alert_dialog_new (_("Replace File?"), NULL);

 adw_alert_dialog_format_body (ADW_ALERT_DIALOG (dialog),
                               _("A file named “%s” already exists. Do you want to replace it?"),
                               filename);

 adw_alert_dialog_add_responses (ADW_ALERT_DIALOG (dialog),
                                 "cancel",  _("_Cancel"),
                                 "replace", _("_Replace"),
                                 NULL);

 adw_alert_dialog_set_response_appearance (ADW_ALERT_DIALOG (dialog),
                                           "replace",
                                           ADW_RESPONSE_DESTRUCTIVE);

 adw_alert_dialog_set_default_response (ADW_ALERT_DIALOG (dialog), "cancel");
 adw_alert_dialog_set_close_response (ADW_ALERT_DIALOG (dialog), "cancel");

 adw_alert_dialog_choose (ADW_ALERT_DIALOG (dialog), GTK_WIDGET (self),
                          NULL, (GAsyncReadyCallback) dialog_cb, self);
}

AdwAlertDialog as GtkBuildable

[adw.alert_dialog.AlertDialog] supports adding responses in UI definitions by via the <responses> element that may contain multiple <response> elements, each respresenting a response.

Each of the <response> elements must have the id attribute specifying the response ID. The contents of the element are used as the response label.

Response labels can be translated with the usual translatable, context and comments attributes.

The <response> elements can also have enabled and/or appearance attributes. See [adw.alert_dialog.AlertDialog.setResponseEnabled] and [adw.alert_dialog.AlertDialog.setResponseAppearance] for details.

Example of an [adw.alert_dialog.AlertDialog] UI definition:

<object class="AdwAlertDialog" id="dialog">
 <property name="heading" translatable="yes">Save Changes?</property>
 <property name="body" translatable="yes">Open documents contain unsaved changes. Changes which are not saved will be permanently lost.</property>
 <property name="default-response">save</property>
 <property name="close-response">cancel</property>
 <signal name="response" handler="response_cb"/>
 <responses>
   <response id="cancel" translatable="yes">_Cancel</response>
   <response id="discard" translatable="yes" appearance="destructive">_Discard</response>
   <response id="save" translatable="yes" appearance="suggested" enabled="false">_Save</response>
 </responses>
</object>

Fluent builder for [adw.alert_dialog.AlertDialog]