#[repr(transparent)]
pub struct Dialog { /* private fields */ }
Expand description

Dialogs are a convenient way to prompt the user for a small amount of input.

An example GtkDialog

Typical uses are to display a message, ask a question, or anything else that does not require extensive effort on the user’s part.

The main area of a Dialog is called the “content area”, and is yours to populate with widgets such a Label or Entry, to present your information, questions, or tasks to the user.

In addition, dialogs allow you to add “action widgets”. Most commonly, action widgets are buttons. Depending on the platform, action widgets may be presented in the header bar at the top of the window, or at the bottom of the window. To add action widgets, create your Dialog using with_buttons(), or use DialogExt::add_button(), DialogExtManual::add_buttons(), or DialogExt::add_action_widget().

GtkDialogs uses some heuristics to decide whether to add a close button to the window decorations. If any of the action buttons use the response ID ResponseType::Close or ResponseType::Cancel, the close button is omitted.

Clicking a button that was added as an action widget will emit the signal::Dialog::response signal 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 ResponseType enumeration (these all have values less than zero). If a dialog receives a delete event, the signal::Dialog::response signal will be emitted with the ResponseType::DeleteEvent response ID.

Dialogs are created with a call to new() or with_buttons(). The latter is recommended; it allows you to set the dialog title, some convenient flags, and add buttons.

A “modal” dialog (that is, one which freezes the rest of the application from user input), can be created by calling GtkWindowExt::set_modal() on the dialog. When using with_buttons(), you can also pass the DialogFlags::MODAL flag to make a dialog modal.

For the simple dialog in the following example, a MessageDialog would save some effort. But you’d need to create the dialog contents manually if you had more than a simple message in the dialog.

An example for simple Dialog usage:

⚠️ The following code is in c ⚠️

// Function to open a dialog box with a message
void
quick_message (GtkWindow *parent, char *message)
{
 GtkWidget *dialog, *label, *content_area;
 GtkDialogFlags flags;

 // Create the widgets
 flags = GTK_DIALOG_DESTROY_WITH_PARENT;
 dialog = gtk_dialog_new_with_buttons ("Message",
                                       parent,
                                       flags,
                                       _("_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_window_destroy),
                           dialog);

 // Add the label, and show everything we’ve added

 gtk_box_append (GTK_BOX (content_area), label);
 gtk_widget_show (dialog);
}

GtkDialog as GtkBuildable

The Dialog implementation of the Buildable interface exposes the @content_area as an internal child with the name “content_area”.

Dialog supports a custom <action-widgets> element, which can contain multiple <action-widget> 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). To mark a response as default, set the “default” attribute of the <action-widget> element to true.

Dialog supports adding action widgets by specifying “action” as the “type” attribute of a <child> element. The widget will be added either to the action area or the headerbar of the dialog, depending on the “use-header-bar” property. The response id has to be associated with the action widget using the <action-widgets> element.

An example of a Dialog UI definition fragment:

<object class="GtkDialog" id="dialog1">
  <child type="action">
    <object class="GtkButton" id="button_cancel"/>
  </child>
  <child type="action">
    <object class="GtkButton" id="button_ok">
    </object>
  </child>
  <action-widgets>
    <action-widget response="cancel">button_cancel</action-widget>
    <action-widget response="ok" default="true">button_ok</action-widget>
  </action-widgets>
</object>

Accessibility

Dialog uses the AccessibleRole::Dialog role.

Implements

DialogExt, GtkWindowExt, WidgetExt, glib::ObjectExt, AccessibleExt, BuildableExt, ConstraintTargetExt, NativeExt, RootExt, ShortcutManagerExt, DialogExtManual, WidgetExtManual, AccessibleExtManual

Implementations

Creates a new dialog box.

Widgets should not be packed into the Window directly, but into the @content_area and @action_area, as described above.

Returns

the new dialog as a Widget

Creates a new builder-pattern struct instance to construct Dialog objects.

This method returns an instance of DialogBuilder which can be used to create Dialog objects.

Creates a new Dialog with the given title and transient parent.

The @flags argument can be used to make the dialog modal, have it destroyed along with its transient parent, or make it use a headerbar.

Button text/response ID pairs should be listed in pairs, with a None pointer ending the list. Button text can be arbitrary text. A response ID can be any positive number, or one of the values in the ResponseType enumeration. If the user clicks one of these buttons, Dialog will emit the signal::Dialog::response signal with the corresponding response ID.

If a Dialog receives a delete event, it will emit ::response with a response ID of ResponseType::DeleteEvent.

However, destroying a dialog does not emit the ::response signal; so be careful relying on ::response when using the DialogFlags::DESTROY_WITH_PARENT flag.

Here’s a simple example: ⚠️ The following code is in c ⚠️

GtkWindow *main_app_window; // Window the dialog should show up on
GtkWidget *dialog;
GtkDialogFlags flags = GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT;
dialog = gtk_dialog_new_with_buttons ("My dialog",
                                      main_app_window,
                                      flags,
                                      _("_OK"),
                                      GTK_RESPONSE_ACCEPT,
                                      _("_Cancel"),
                                      GTK_RESPONSE_REJECT,
                                      NULL);
title

Title of the dialog

parent

Transient parent of the dialog

flags

from DialogFlags

first_button_text

text to go in first button

Returns

a new Dialog

Trait Implementations

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
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Formats the value using the given formatter. Read more
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Override the virtual methods of this class for the given subclass and do other class initialization. Read more
Instance specific initialization. Read more
This method returns an Ordering between self and other. Read more
Compares and returns the maximum of two values. Read more
Compares and returns the minimum of two values. Read more
Restrict a value to a certain interval. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
Returns the type identifier of Self.

Auto Trait Implementations

Blanket Implementations

Updates an array of accessible properties. Read more
Updates an array of accessible relations. Read more
Updates an array of accessible states. Read more
Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
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Upcasts an object to a superclass or interface T. Read more
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Tries to downcast to a subclass or interface implementor T. Read more
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Tries to cast to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more
Tries to cast to reference to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more
Casts to T unconditionally. Read more
Casts to &T unconditionally. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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Similar to Self::set_property but fails instead of panicking.
Sets the property property_name of the object to value value. Read more
Similar to Self::set_property but fails instead of panicking.
Sets the property property_name of the object to value value. Read more
Similar to Self::set_properties but fails instead of panicking.
Sets multiple properties of the object at once. Read more
Similar to Self::set_properties_from_value but fails instead of panicking.
Sets multiple properties of the object at once. Read more
Similar to Self::property but fails instead of panicking.
Gets the property property_name of the object and cast it to the type V. Read more
Similar to Self::property_value but fails instead of panicking.
Gets the property property_name of the object. Read more
Check if the object has a property property_name of the given type_. Read more
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Set arbitrary data on this object with the given key. Read more
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Block a given signal handler. Read more
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Similar to Self::connect but fails instead of panicking.
Connect to the signal signal_name on this object. Read more
Similar to Self::connect_id but fails instead of panicking.
Connect to the signal signal_id on this object. Read more
Similar to Self::connect_local but fails instead of panicking.
Connect to the signal signal_name on this object. Read more
Similar to Self::connect_local_id but fails instead of panicking.
Connect to the signal signal_id on this object. Read more
Similar to Self::connect_unsafe but fails instead of panicking.
Connect to the signal signal_name on this object. Read more
Similar to Self::connect_unsafe_id but fails instead of panicking.
Similar to Self::connect_closure but fails instead of panicking.
Connect a closure to the signal signal_name on this object. Read more
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Connect a closure to the signal signal_id on this object. Read more
Limits the lifetime of closure to the lifetime of the object. When the object’s reference count drops to zero, the closure will be invalidated. An invalidated closure will ignore any calls to invoke_with_values, or invoke when using Rust closures. Read more
Connect to the signal signal_id on this object. Read more
Similar to Self::emit but fails instead of panicking.
Emit signal by signal id. Read more
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Same as Self::emit but takes Value for the arguments.
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Emit signal by its name. Read more
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Emit signal by its name. Read more
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Emit signal by its name with details. Read more
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Emit signal by its name with details. Read more
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Emit signal by signal id with details. Read more
Similar to Self::emit_with_details_and_values but fails instead of panicking.
Emit signal by signal id with details. Read more
Disconnect a previously connected signal handler.
Connect to the notify signal of the object. Read more
Connect to the notify signal of the object. Read more
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Notify that the given property has changed its value. Read more
Notify that the given property has changed its value. Read more
Downgrade this object to a weak reference.
Add a callback to be notified when the Object is disposed.
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