jet_cad_2d_plan

The plan library of jet_cad_2d. A PlanController owns one plan — its document, the parametric system over it, the camera, the selection, the tools, the undo history — and the design-mode widgets take only the controller: PlanCanvas, PlanToolPalette, PlanSymbolGallery, PlanPropertyPanel, PlanLayerPanel, PlanPagePanel and PlanShortcuts, or PlanEditor, which lays them out as one editor.

In service mode (controller.setMode(PlanMode.service)) staff work on a copy of the plan: PlanServiceView (which PlanEditor shows in that mode) taps, selects, groups and moves its units -- the tables placed by hand and the seats a kit's rows generate -- by their labels, with statuses, groups, focus and the host's own widgets on them. Nothing done there reaches the saved plan; serviceJson() and restoreService keep the moves and groups apart from it.

What a plan holds beyond lines and shapes comes from kits (package:jet_cad_2d_kit): their parametric types, tools, attachment providers and symbol libraries. The library knows no domain. A plan that names a kit the host did not load opens, draws and saves its objects unchanged, and locks them; a kit whose code fails is contained to the objects it broke.

Use

// PlanEditor over an empty plan with no kit: the plan library's own tools,
// the layers and the page; a button in each bar switches to the service
// mode and back. Run from the package directory with
// `flutter run -t example/main.dart`.
import 'package:flutter/material.dart';
import 'package:jet_cad_2d_plan/jet_cad_2d_plan.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await ensurePlanFonts();
  registerFontLicences();
  runApp(const PlanExampleApp());
}

class PlanExampleApp extends StatefulWidget {
  const PlanExampleApp({super.key});

  @override
  State<PlanExampleApp> createState() => PlanExampleAppState();
}

class PlanExampleAppState extends State<PlanExampleApp> {
  /// One plan and no kit: a kit package adds its types, tools and symbols
  /// through `PlanController(kits: [...])`.
  final PlanController controller = PlanController(kits: const []);

  @override
  void dispose() {
    controller.dispose();
    super.dispose();
  }

  /// Switches the plan to [next]: the service mode works on a copy, so
  /// nothing done there reaches the saved plan.
  Widget modeButton(PlanMode next) => IconButton(
        key: Key('example-${next.name}'),
        tooltip: next.name,
        icon: Icon(next == PlanMode.service
            ? Icons.room_service_outlined
            : Icons.edit_outlined),
        onPressed: () => controller.setMode(next),
      );

  @override
  Widget build(BuildContext context) => MaterialApp(
        supportedLocales: planSupportedLocales,
        localizationsDelegates: planLocalizationsDelegates,
        home: Scaffold(
          body: PlanEditor(
            controller: controller,
            bar: PlanEditorBar(trailing: [modeButton(PlanMode.service)]),
            serviceBar: PlanServiceBar(trailing: [modeButton(PlanMode.design)]),
          ),
        ),
      );
}

• PlanController.save() and load(text) read and write a plan; export('plan.pdf' or 'plan.png', choice) and print(choice) make its page's bytes; a host adds its own exporters and importers.
• PlanPermissions decide what the editor lets a user change.
• The kit author's contract is docs/kits.md in the repository.

Screenshots

PlanSymbolGallery: the plan library's symbol library, the loaded kits' symbols in collapsible categories of thumbnail cells, browsable with a search over names and tags.

These pictures are made by tool/screenshots in the repository, with the plan's own theme.

The API

package:jet_cad_2d_plan/jet_cad_2d_plan.dart is the API. Nothing under src/ is.

The jet-cad packages

A host that embeds the planner adds jet_cad_2d_plan and the kits it loads; the kit contract, the renderer and the engine come with them, and a host should not also depend on them directly unless it uses their API itself.

Embedding the floor planner in an app is walked through in the host guide.

Support

If jet-cad is useful to you, you can support its development through GitHub Sponsors or Buy Me a Coffee.

License

Apache License 2.0. See LICENSE.