MessageDialogRef

public struct MessageDialogRef : MessageDialogProtocol, GWeakCapturing

GtkMessageDialog presents a dialog with some message text.

It’s simply a convenience widget; you could construct the equivalent of GtkMessageDialog from GtkDialog without too much effort, but GtkMessageDialog saves typing.

The easiest way to do a modal message dialog is to use the GTK_DIALOG_MODAL flag, which will call [methodGtk.Window.set_modal] internally. The dialog will prevent interaction with the parent window until it’s hidden or destroyed. You can use the [signalGtk.Dialog::response] signal to know when the user dismissed the dialog.

An example for using a modal dialog:

GtkDialogFlags flags = GTK_DIALOG_DESTROY_WITH_PARENT | GTK_DIALOG_MODAL;
dialog = gtk_message_dialog_new (parent_window,
                                 flags,
                                 GTK_MESSAGE_ERROR,
                                 GTK_BUTTONS_CLOSE,
                                 "Error reading “`s`”: `s`",
                                 filename,
                                 g_strerror (errno));
// Destroy the dialog when the user responds to it
// (e.g. clicks a button)

g_signal_connect (dialog, "response",
                  G_CALLBACK (gtk_window_destroy),
                  NULL);

You might do a non-modal GtkMessageDialog simply by omitting the GTK_DIALOG_MODAL flag:

GtkDialogFlags flags = GTK_DIALOG_DESTROY_WITH_PARENT;
dialog = gtk_message_dialog_new (parent_window,
                                 flags,
                                 GTK_MESSAGE_ERROR,
                                 GTK_BUTTONS_CLOSE,
                                 "Error reading “`s`”: `s`",
                                 filename,
                                 g_strerror (errno));

// Destroy the dialog when the user responds to it
// (e.g. clicks a button)
g_signal_connect (dialog, "response",
                  G_CALLBACK (gtk_window_destroy),
                  NULL);

GtkMessageDialog as GtkBuildable

The GtkMessageDialog implementation of the GtkBuildable interface exposes the message area as an internal child with the name “message_area”.

The MessageDialogRef type acts as a lightweight Swift reference to an underlying GtkMessageDialog instance. It exposes methods that can operate on this data type through MessageDialogProtocol conformance. Use MessageDialogRef only as an unowned reference to an existing GtkMessageDialog instance.