scratch_to_win

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Flutter widget: a scratch-off layer on top of any child. Drag to reveal what is underneath. Pointer lifecycle callbacks and an optional grid-based estimate of cleared area (for thresholds and win logic).

Install

dependencies:
  scratch_to_win: ^0.2.4

Try the interactive example

• Live (web): GitHub Pages demo — enable Settings → Pages → GitHub Actions in this repo on first use; the Deploy example (web) workflow must succeed once.
• In the package: the published tarball includes the example/ Flutter project (interactive “lab” for every API option).
• On pub.dev, open the package’s repository link to browse example/ online, or use your pub cache after dart pub get.

Quick start

ScratchToWin(
  child: Center(child: Text('You won!')),
  onRevealProgress: (f) => debugPrint('cleared: $f'),
  onThresholdReached: (f) => debugPrint('threshold at $f'),
)

API overview

Area	Details
Callbacks	onScratchStart, onScratchUpdate, onScratchEnd, onScratchCancel, onRevealProgress, onThresholdReached
Brush	Round stroke: brushRadius; optional brushTexture (ImageProvider)
Progress	trackRevealProgress, progressGridResolution (see class docs), revealThreshold
Control	ScratchToWinController.reset(), revealAll(), enabled
Surface	overlayColor, overlayGradient, overlayImage, overlayImageFit, borderRadius
Completion	playConfettiOnThreshold, confettiParticleCount, confettiDuration, confettiMinChipSize, confettiMaxChipSize; optional sound
Accessibility	showRevealAssistButton, revealAssistButtonLabel ('' hides if switch on), revealAssistPadding

Pure Flutter drawing for the scratch layer; built-in full-card confetti (no extra package). Optional audioplayers for completion SFX. Optional haptics on start and when the threshold is crossed.

Example (local)

git clone https://github.com/Dev-Muhammad-Junaid/scratch_to_win.git
cd scratch_to_win/example
flutter pub get
flutter run

See example/README.md for the lab app, web build, and pub.dev layout.

Development

flutter pub get
flutter analyze
flutter test

Publish checks: dart pub publish --dry-run. See pub.dev scoring for documentation and analysis expectations.

License

MIT. See LICENSE.