horizontal_credit_card

---

Visual Showcase

3D Physical Rim & Embossed Typography	Dynamic Holographic Security Stripe
Platinum Elite Hologram Ribbon	Security Badge & Instant Copy Button

---

Features

• ISO/IEC 7810 ID-1 Standard Ratio: Native landscape aspect ratio (1.586 : 1) tailored for classical horizontal payment cards.
• Interactive 3D Perspective Physics: Pointer drag and gyroscopic angle deflection calculated via 4x4 homogeneous transformation matrices (Matrix4).
• Physical 3D Thickness: Multi-layered rim edge rendering simulating real physical plastic card depth (default 3.5 logical pixels).
• Dynamic Specular Lighting: Ambient light sweep reacting dynamically to tilt coordinate changes.
• Holographic Security Foil: Shimmering rainbow diffraction grating with mathematical optical color shifts in full-surface, security stripe, or security badge layouts.
• Dynamic 60-Second Rolling CVV: Timed dynamic security code with an animated countdown progress ring and automated code rotation.
• Quick-Copy Card Number: Subtle one-touch copy button with animated checkmark feedback, whitespace sanitization, and callback hooks.
• 180° Perspective Flip: Smooth hardware-accelerated 3D rotation revealing the magnetic stripe, signature panel, and CVV on the back.
• Sensitive Data Masking: Tap-to-reveal privacy masking for 16-digit card numbers and CVV codes.
• Financial Security States: Built-in support for isFrozen (frosted crystal overlay with padlock) and isExpired states.
• Letterpress Embossed Typography: Stamped physical 3D bevels, silver/gold liquid foil stamping, and flat print finishes.
• Slot Injections: Custom widget slots for bank branding logos and payment networks.
• Zero External Dependencies: Built purely on Flutter core SDK for 100% enterprise compliance, rock-solid stability, and 120 FPS performance.

---

Architecture & Design Patterns

horizontal_credit_card is engineered using classical software patterns tailored to Flutter's reactive tree:

• Composite Pattern: Hierarchical composition from the root HorizontalCard through 3D rim extruders down to atomic vector leaf nodes (BrandLogo, EmvChip).
• Observer & Controller Pattern: Decoupled DynamicCvvController and DynamicCvvConfig managing rotating security codes without triggering global widget re-renders.
• Strategy & Factory Pattern: Extensible theme configurations and pre-calibrated CardPresets.
• Procedural Vector Pipeline: GPU-direct shaders and CustomPainter implementations with strict repaint boundaries.

For comprehensive technical rationale, sequence models, and affine $4\times4$ projection formulas, read the Architectural Specification.

---

Getting Started

Add horizontal_credit_card to your pubspec.yaml:

dependencies:
  horizontal_credit_card: ^0.0.1

Or install it from your terminal:

flutter pub add horizontal_credit_card

Import it in your Dart code:

import 'package:horizontal_credit_card/horizontal_credit_card.dart';

---

Usage Examples

1. Basic Interactive Card

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

class BasicCardDemo extends StatelessWidget {
  const BasicCardDemo({super.key});

  @override
  Widget build(BuildContext context) {
    return Center(
      child: HorizontalCard(
        cardNumber: '4532 8812 9043 7721',
        cardHolder: 'Alexander Wright',
        expiryDate: '09/29',
        cvv: '842',
        brand: CardBrand.visa,
        cardTheme: CardPresets.crimsonOrbit,
        textFinish: CardTextFinish.embossed,
        enableTilt: true,
        thickness: 3.5,
      ),
    );
  }
}

2. Holographic Security Foil with Quick-Copy Button

HorizontalCard(
  cardNumber: '5412 7512 3412 8901',
  cardHolder: 'Sophia Montgomery',
  expiryDate: '12/28',
  cvv: '593',
  brand: CardBrand.mastercard,
  cardTheme: CardPresets.solidCobaltBlue,
  isHolographic: true,
  holoConfig: const HoloFoilConfig(
    style: HoloStyle.securityStripe,
    intensity: 0.85,
    stripeWidthFactor: 0.12,
    stripeAlignment: -0.55,
  ),
  enableCopy: true,
  cleanCopiedNumber: true,
  onCardNumberCopied: (number) {
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(content: Text('Copied card number: $number')),
    );
  },
)

3. Dynamic Rolling CVV with Countdown Ring

HorizontalCard(
  cardNumber: '4000 1234 5678 9010',
  cardHolder: 'David Miller',
  expiryDate: '04/27',
  cvv: '123',
  brand: CardBrand.visa,
  cardTheme: CardPresets.solidMatteBlack,
  isDynamicCvv: true,
  dynamicCvvConfig: const DynamicCvvConfig(
    interval: Duration(seconds: 60),
    showCountdownRing: true,
    showCountdownText: true,
    cvvLength: 3,
  ),
)

---

Curated Presets Library (CardPresets)

The package includes ready-to-use production card themes categorized into specialized collections:

1. Geometric Patterns Collection

• CardPresets.crimsonOrbit: Vibrant rose crimson and ruby gradient with intersecting geometric orbital rings.
• CardPresets.royalAmethyst: Royal amethyst purple gradient with intersecting geometric orbital rings.
• CardPresets.oceanAzure: Ocean cyan and azure gradient with intersecting geometric orbital rings.
• CardPresets.midnightSapphire: Deep midnight sapphire navy with luminous geometric orbital rings.
• CardPresets.amexGreen: Heritage American Express Green Card with banknote guilloche and centurion watermark.
• CardPresets.cyberMesh: High-tech cybersecurity card with isometric grid and cyan glow.

2. Minimalist Solid Colors Collection

• CardPresets.solidMatteBlack: Stealth matte black finish with silver typography.
• CardPresets.solidCeramicWhite: Pure ceramic white card with obsidian typography (Apple Card style).
• CardPresets.solidCobaltBlue: International debit cobalt blue with 3D embossed relief.
• CardPresets.solidHotCoral: Modern neobank hot coral finish (Monzo style).
• CardPresets.solidNubankPurple: Iconic solid electric purple (Nubank style).
• CardPresets.solidEmerald: Deep Swiss private banking solid emerald green.

3. Luxury Metals Collection

• CardPresets.obsidianBlack: Deep obsidian carbon finish with silver borders.
• CardPresets.appleTitanium: Minimalist brushed platinum titanium finish.
• CardPresets.electricPurple: Vibrant neobank purple gradient.

---

Physical Typography Relief (CardTextFinish)

• CardTextFinish.embossed: Stamped physical 3D letterpress with dynamic directional bevel highlights and deep cast shadows.
• CardTextFinish.silverFoil: Liquid chrome silver platinum foil stamping.
• CardTextFinish.goldFoil: Directional hot-stamped gold bullion foil with specular glint.
• CardTextFinish.flat: Crisp anti-aliased digital ink printing.

---

Holographic Foil Styles (HoloStyle)

• HoloStyle.full: Dynamic rainbow diffraction wash across the entire card surface.
• HoloStyle.securityStripe: Vertical security hologram foil stripe (customizable width and horizontal alignment).
• HoloStyle.securityBadge: Compact holographic security badge stamp positioned above the signature or watermark.

---

Parameters Reference

Parameter	Type	Default	Description
cardNumber	String	Required	16-digit (or 15-digit) card number
cardHolder	String	Required	Cardholder full name
expiryDate	String	Required	Expiration date (MM/YY)
cvv	String	Required	3 or 4 digit security code
brand	CardBrand	CardBrand.visa	Payment network brand
cardTheme	HorizontalCardTheme	HorizontalCardTheme.black	Theme configuration
textFinish	CardTextFinish?	null	Typography finish override
thickness	double	3.5	Physical 3D thickness (rim edge) in dp
width	double	320.0	Outer card width
height	double?	width / 1.586	Outer card height
isFlipped	bool	false	Programmatic flip to back
isMasked	bool	false	Mask sensitive numbers
isDynamicCvv	bool	false	Enable rolling dynamic CVV with timer
dynamicCvvConfig	DynamicCvvConfig?	null	Rolling CVV duration and appearance
dynamicCvvController	DynamicCvvController?	null	External controller for rolling CVV
enableCopy	bool	false	Show one-tap copy button next to digits
cleanCopiedNumber	bool	true	Strip spaces when copying to clipboard
onCardNumberCopied	ValueChanged<String>?	null	Callback after card number is copied
isFrozen	bool	false	Frosted ice overlay with padlock
isExpired	bool	false	Expired banner overlay
isHolographic	bool	false	Enable rainbow holographic foil shimmer
holoConfig	HoloFoilConfig?	null	Holographic foil style, intensity, and layout
bankLogo	Widget?	null	Custom top-right logo
enableTilt	bool	true	Interactive 3D tilt physics
onTap	VoidCallback?	null	Tap callback
onFlip	ValueChanged<bool>?	null	Flip state listener

---

Support

If you find horizontal_credit_card useful and it saved you time in your project, consider supporting its development. Every coffee helps keep the project maintained, tested, and expanding with new 3D features:

---

Contributing

Contributions, issues, and feature requests are welcome. Feel free to check the issues page or submit a pull request.

---

License

This project is licensed under the MIT License - see the LICENSE file for details.