当用户单击GTK+3.0中的GtkFileChooser或GtkFileChooserButton时，如何触发事件？

#include <gtk/gtk.h>

// 回调函数
static void file_chooser_clicked(GtkFileChooserButton *chooser, gpointer user_data) {
    // 处理逻辑
    g_print("File chooser clicked!\n");
}

int main(int argc, char *argv[]) {
    GtkWidget *window;
    GtkWidget *file_chooser_button;

    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    file_chooser_button = gtk_file_chooser_button_new("Select a file", GTK_FILE_CHOOSER_ACTION_OPEN);
    g_signal_connect(file_chooser_button, "clicked", G_CALLBACK(file_chooser_clicked), NULL);

    gtk_container_add(GTK_CONTAINER(window), file_chooser_button);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}