Gradience/src/ui/presets_manager_window.blp

using Gtk 4.0;
using Adw 1;

template GradiencePresetWindow: Adw.Window {
    deletable: true;
    default-width: 550;
    default-height: 550;
    Adw.ToastOverlay toast_overlay {
        Gtk.Box main_view {
            orientation: vertical;
            Adw.HeaderBar titlebar {
                centering-policy: strict;
                [title]
                Adw.WindowTitle {
                    title: _("Presets");
                }

                [start]
                Button import-button {
                    styles ["suggested-action"]
                    label: _("Import");
                    action-name: "app.import_preset";
                }


                [end]
                Button {
                    icon-name: "folder-open-symbolic";
                    action-name: "app.open_preset_directory";
                }
            }

            Gtk.Box {
                orientation: vertical;

                Adw.ViewStack view_stack {
                    vexpand: true;
                    hexpand: true;

                    Adw.ViewStackPage {
                        name: "manage";
                        title: _("Manage");
                        icon-name: "larger-brush-symbolic";
                        
                        child: Adw.PreferencesPage content { };
                
                    }

                    Adw.ViewStackPage {
                        name: "explore";
                        title: _("Explore");
                        icon-name: "applications-science-symbolic";

                        child: Adw.PreferencesPage content_explore { };
                    }

                }
            }

            Adw.ViewSwitcherBar {
                stack: view_stack;
                reveal: bind title.title-visible;
            }
        }
    }
        
}