zpl_kit 0.0.7

A declarative layout engine for building and printing Zebra Programming Language (ZPL) labels with Flexbox-like components.

0.0.7 - 2026-04-17

• Direct Printing: Formally integrated TcpZplPrinter (Socket) and HttpZplPrinter (REST) into the core library for direct communication with thermal printers across Mobile and Web.
• Documentation: Expanded API documentation across all core components and printing services.

0.0.6+2 - 2026-04-10

• Analysis Fix: Resolved a circular dependency between the main library and internal widgets that caused pub.dev analysis to fail.
• Compatibility: Improved support for older Flutter stable versions by replacing withValues() with the more broadly supported withOpacity().
• Maintenance: Formatted all source files to improve pub.dev scoring and adhere to Dart style guidelines.

0.0.6+1 - 2026-04-08

• Documentation: Fixed missing images in README on pub.dev by switching to absolute URLs.

0.0.6 - 2026-04-08

• Industrial Accuracy: Refactored ZplBarcode to use exact ISO-standard module math for width calculation (Code 128/39), ensuring pixel-perfect alignment on physical Zebra printers.
• Labelary Integration: Added ZplLabelaryPreview widget and LabelaryService for 100% accurate, cloud-powered label previews.
• Refined Rendering: Removed ellipsis from ZplText preview to match real thermal printer behavior (physical clipping vs digital truncation).
• Network Support: Added http dependency to handle remote cloud rendering requests.
• Example Enhancements: Updated example app with a new "Cloud Preview" tab for side-by-side comparison between Native and Labelary rendering engines.

0.0.5 - 2026-04-08

• Maintenance Release: Force republish to resolve stuck pub.dev analysis queue.
• Formatted source code to improve pub points score.

0.0.4 - 2026-04-07

Major Architectural Upgrade

• 3-Pass Layout Engine: Refactored the internal engine to separate size calculation, coordinate assignment, and rendering.
  • Pass 1: performLayout (Bottom-Up sizing)
  • Pass 2: finalizeLayout (Top-Down absolute positioning)
  • Pass 3: compile or paint (Rendering)
• Native Preview Support: Added ZplPreview widget for instant, offline visual label preview without Labelary API.
• Offline Barcode Rendering: Integrated barcode package for high-fidelity 1D barcode previews on the Flutter canvas.

Components & Core

• ZplPreview: New widget for rendering ZPL layouts directly to a Flutter canvas.
• Improved Performance: Separating coordinate calculation from ZPL generation speeds up complex label builds.
• Refined Layouts: ZplColumn and ZplRow now handle coordinate propagation more robustly.

0.0.3 - 2026-04-01

• New Layout Components: Added ZplCenter, ZplExpanded, ZplSpacer, and ZplDivider for advanced alignment and spacing control.
• Flex Layout Improvements: ZplRow and ZplColumn now support weighted distribution using ZplExpanded and improved constraint propagation.
• Rich Text Features: ZplText now supports multi-line wrapping with maxLines and text alignment (Left, Center, Right, Justified) via the ZPL Field Block (^FB) command.
• Validation Suite: Introduced automated internal tests for validating layout primitives and complex shipping label designs.
• Documentation Overhaul: Major README updates with deep-dive examples, before/after code blocks, and feature highlights.

0.0.2

• Advanced Layout: Added ZplStack for overlapping elements and ZplGraphicBox for lines and boxes.
• Label Dimensions: Introduced ZplLabelSize with pre-defined standards like Shipping (4x6).
• Improved API: Added ZplFont.helvetica() helper for simpler scalable font management.
• Printing Support: Added ZebraPrinterService in the example app for direct socket-based network printing.
• Example Enhancements: Updated the example app with a full professional shipping label layout and printer settings.

0.0.1+1

• Added comprehensive DartDoc documentation for core API elements.
• Fixed class names in the README example.
• Improved library-level documentation for pub.dev scoring.

0.0.1

• Initial Release: Core declarative layout engine for Zebra Programming Language (ZPL).
• Layout Components: Added ZplColumn, ZplRow, and ZplPadding for coordinate-free design.
• Basic Widgets: Implemented ZplText and ZplBarcode (supporting Code 128 and other common types).
• Compiler: Integrated ZplBuilder to transform the component tree into raw ZPL strings.
• Example Project: Added a full Flutter example app for interactive testing and demonstration.