paper_kit

Ink on paper, for Flutter. A UI kit of handmade-paper widgets: rubber stamps that leave a red impression, tickets you tear to confirm, receipts that print out of the top of the screen, sticky notes you peel by the corner, a send button that folds into a paper plane, and an iPhone frame with a fingertip that taps through your app by itself.

See every widget live, with its code, at kit.mofiyinebo.com.

• No dependencies beyond Flutter, and no image assets: the paper grain is drawn in code.
• Light (cream #f4ecde) and dark (espresso #171512) palettes.
• Every control works with a keyboard and a screen reader.

Install

flutter pub add paper_kit

The widgets ask for Montserrat. The kit doesn't bundle fonts, so either add it with google_fonts:

final paper = PaperThemeData.light(
  fontBuilder: (style) => GoogleFonts.montserrat(textStyle: style),
);

or register it as an asset named Montserrat in your pubspec.yaml, or pass any other fontFamily to PaperThemeData.

Quick start

import 'package:flutter/material.dart';
import 'package:paper_kit/paper_kit.dart';

void main() => runApp(const NotebookApp());

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

  @override
  State<NotebookApp> createState() => _NotebookAppState();
}

class _NotebookAppState extends State<NotebookApp> {
  bool _dark = false;
  bool _done = false;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      // Applies the theme, and spreads a new palette over the old one like ink.
      builder: (context, child) => PaperInkReveal(
        theme: _dark ? PaperThemeData.dark() : PaperThemeData.light(),
        child: child!,
      ),
      home: Scaffold(
        body: PaperBackground(
          child: SafeArea(
            child: ListView(
              padding: const EdgeInsets.all(24),
              children: [
                PaperThemeToggle(
                  isDark: _dark,
                  onChanged: (dark) => setState(() => _dark = dark),
                ),
                const SizedBox(height: 24),
                const PaperHeading('today'),
                const SizedBox(height: 16),
                PaperCheckbox(
                  label: 'water the plants',
                  value: _done,
                  onChanged: (done) => setState(() => _done = done),
                ),
                const SizedBox(height: 24),
                PaperStampButton(label: 'approved', onPressed: () {}),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

Widgets

Widget	What it does
PaperTheme, PaperThemeData, PaperPalette	Colours and type for the kit; toMaterialTheme() matches Material widgets to it.
PaperInkReveal	Themes an app and lets a new palette soak over the old one like ink.
PaperBackground	Paper colour with a fine procedural grain, or your own texture.
PaperHeading	A lowercase bold heading with a short bar beneath it.
PaperThemeToggle	"dark" / "light" in words, with a half-inked dot that turns over.
PaperStampButton	A rubber stamp that leaves a fading red impression of its label.
PaperStampImpression	The impression on its own, to place anywhere.
PaperCheckbox	A hand-drawn box with a scribbled tick that crosses out its label.
PaperTextField	A field on a ruled line; errors become a wavy red-pen underline.
PaperIndexTabs, PaperTab	A notebook page with coloured index tabs on its edge.
PaperTearToConfirm	A ticket you confirm by tearing off the stub.
PaperReceipt	A receipt; PaperReceipt.show prints one as a toast and tears it off.
PaperPlaneButton	A send button that folds into a paper plane and flies away.
PaperPeel	A sticky note you peel off by dragging its corner.
PaperZine	A concertina-folded list whose panels unfold one by one.
PaperNote	A card held on with washi tape, a little crooked.
PaperRuler	A slider drawn as a paper ruler, snapping to its marks.
PaperEnvelope	A sealed envelope: tap to crack the wax, swing the flap open and slide the letter out.
PaperShredder	Feeds what it holds into a strip-cut shredder; the strips curl apart and fall.
PaperTypewriter	Types text a key at a time, each letter a little off the line and unevenly inked.
PaperFlipPad	A wire-bound pad whose pages flip up over the rings, like a desk calendar.
PaperHighlightSwitch	A switch that drags a streaky highlighter across its label.
PaperRedact	Text blacked out with a marker, line by line, until you tap it.
PaperPunchCard	A loyalty card: each tap punches a real hole and the disc tumbles out.
PaperClip	A slip held to a card with a wire paperclip; tap to slide it out.
PaperCutRule	A dashed "cut here" line; drag the scissors along it and the coupon comes away.
PaperHaptics	Haptic patterns that feel like paper: stamp, tear, punch, flip, snip and more.
PaperPhoneFrame	An iPhone drawn in code, to show an app on a page.
PaperFingertip, PaperDemoController, PaperDemoScript, PaperDemoStep	A scripted fingertip that taps and drags the real widgets on screen, and stops when someone touches it.
PaperFadeUpRoute, PaperFadeUpTransition	The kit's screen transition: fade in while rising 1.8%.
PaperMotion	The kit's curves and durations.

Theming

PaperThemeData holds a PaperPalette (paper, sheet, ink, muted, faint, rule, accent, primary, red pen, blue ink, sticky note and seven tab tones), a fontFamily, and whether to draw the grain. Use the presets or adjust one:

final theme = PaperThemeData.light().copyWith(
  palette: PaperPalette.light.copyWith(redPen: const Color(0xFFC0392B)),
  grain: false,
);

Wrap a subtree in PaperTheme(data: theme, child: ...), or the whole app in PaperInkReveal. Without either, widgets follow the brightness of the Material Theme. Every text style comes from theme.text(...), so your own widgets can match.

A phone that demos itself

final fingertip = PaperDemoController();
final stamp = GlobalKey();

PaperPhoneFrame(
  width: 280,
  demo: fingertip,
  child: Center(child: PaperStampButton(key: stamp, label: 'filed', onPressed: save)),
);

PaperDemoScript(
  controller: fingertip,
  steps: [PaperDemoStep.tapKey(stamp), PaperDemoStep.wait(const Duration(seconds: 1))],
).play();

The fingertip sends real pointer events, so taps and drags go to your widgets. They carry the device id kPaperDemoPointerDevice; any other touch on the frame stops the script.

Example

example/ is a gallery of every widget in light and dark. Run it with:

cd example
flutter create . --platforms=web,ios,android
flutter run

Licence

MIT. Made by Mofiyinfoluwa Ebo.