warehouse/data/ui/downgrade.blp

using Gtk 4.0;
using Adw 1;

template $DowngradeWindow: Adw.Window {
  default-width: 500;
  default-height: 450;
  modal: true;

  Adw.ToolbarView main_toolbar_view {
    [top]
    HeaderBar header_bar {
      show-title-buttons: false;

      [start]
      Button cancel_button {
        label: _("Cancel");
      }

      [end]
      Button apply_button {
        sensitive: false;
        label: _("Downgrade");

        styles [
          "suggested-action"
        ]
      }
    }

    content: Adw.ToastOverlay toast_overlay {
      Stack main_stack {
        Box loading {
          orientation: vertical;
          spacing: 10;
          margin-top: 40;
          margin-bottom: 20;
          halign: center;
          valign: center;

          Spinner {
            margin-bottom: 35;
            width-request: 30;
            height-request: 30;
            opacity: 0.5;
            spinning: true;
          }

          Label loading_label {
            label: _("Fetching Releases…");
            styles [
              "title-1",
              "title"
            ]
          }

          Label {
            label: _("This could take a while.");
            styles ["description", "body"]
          }
        }

        Adw.PreferencesPage outerbox {
          Adw.PreferencesGroup {
            Adw.SwitchRow mask_row {
              title: _("Disable Updates");
              active: true;
            }
          }

          Adw.PreferencesGroup versions_group {
            title: _("Select a Release");
            description: _("This will uninstall the current release and install the chosen one instead. Note that downgrading can cause issues.");
          }
        }
      }
    };
  }
}