This repository contains implementations designed to add native Windows touchscreen and stylus support (smooth 1:1 panning, inertial flinging, click synthesis, and modal priority hit-testing) to Jetpack/JetBrains Compose for Desktop applications.

The repository is divided into two separate implementations:

• Status: ✅ Production-Ready & Fully Functional
• Author: Antigravity 2.0 (using the Gemini 3.5 Flash (Hard) AI model)
• Details:
  • Implements low-level Win32 WndProc subclassing using JNA on the top-level window and child canvas HWNDs.
  • Supports organic momentum fling scrolling using Compose's native velocity trackers and animation curves.
  • Provides tap-to-click propagation to ensure buttons, switches, and other standard controls trigger normally.
  • Fixes overlap z-order depth conflicts via a priority-layered Modifier.touchScrim and Modifier.touchScrollable configuration (ensuring foreground modal dialogs receive touch inputs correctly while blocking underlying scroll lists).
  • Includes a fully automated unit test suite and a high-contrast dark-themed sandbox demonstration app.
  • For configuration and publishing guides, see the Antigravity README.

• Status: ❌ Failed / Non-functional / Incomplete
• Author: Claude Code (using the Fable AI model)
• Details:
  • An incomplete implementation that was left in a non-functional state.
  • Stored here for reference or historical comparison.

To explore or run the active touch implementation:

1. Open a terminal in the ./Antigravity directory.
2. Read the Antigravity Documentation for setup and API guidelines.
3. Launch the sandbox demonstration:

   ./gradlew :touch-demo:run