OpenMultitouchSupport

This is a fork of Kyome22/OpenMultitouchSupport with some added features.

It adds support for:

• Listing all available devices
• Selecting a device
• Getting device name

---

This enables you easily to observe global multitouch events on the trackpad (only default device).
I created this library to make MultitouchSupport.framework (Private Framework) easy to use.

References

This library refers the following frameworks very much. Special Thanks!

• mhuusko5/M5MultitouchSupport
• calftrail/Touch

Requirements

• Development with Xcode 16.0+
• swift-tools-version: 6.0
• Compatible with macOS 13.0+

Demo

Usage

App SandBox must be disabled to use OpenMultitouchSupport.

import OpenMultitouchSupport

let manager = OMSManager.shared()

Task { [weak self, manager] in
    for await touchData in manager.touchDataStream {
        // use touchData
    }
}

manager.startListening()
manager.stopListening()

The data you can get are as follows

struct OMSPosition: Sendable {
    var x: Float
    var y: Float
}

struct OMSAxis: Sendable {
    var major: Float
    var minor: Float
}

enum OMSState: String, Sendable {
    case notTouching
    case starting
    case hovering
    case making
    case touching
    case breaking
    case lingering
    case leaving
}

struct OMSTouchData: Sendable {
    var id: Int32
    var position: OMSPosition
    var total: Float // total value of capacitance
    var pressure: Float
    var axis: OMSAxis
    var angle: Float // finger angle
    var density: Float // area density of capacitance
    var state: OMSState
    var timestamp: String
}

Development Workflow

This package uses a hybrid approach with both Swift wrapper code and binary XCFramework distribution. Here's how to update the library:

Updating Swift Wrapper Code Only

When you need to modify the Swift API layer (files in Sources/OpenMultitouchSupport/):

1. Edit the Swift files in Sources/OpenMultitouchSupport/
2. Commit and push changes to GitHub
3. In consuming projects: Update packages in Xcode (File → Packages → Update to Latest Package Versions)

Since consuming projects typically use branch: main, they will automatically get the latest Swift wrapper changes.

Updating the Binary XCFramework

When you need to modify the underlying Framework code:

1. Update the Framework code in Framework/OpenMultitouchSupportXCF/
2. Build new XCFramework:

   ./build_framework.sh

3. Create new release:

   ./release.sh 1.0.x  # Replace x with next version number

4. Update Package.swift to point to the new release URL and checksum
5. Commit and push the Package.swift changes
6. In consuming projects: Update packages in Xcode

Release Script

The release.sh script automates the binary release process:

• Builds the XCFramework
• Creates a GitHub release with the binary artifact
• Updates Package.swift with the correct URL and checksum
• Commits the changes

This workflow allows rapid iteration on the Swift API while maintaining stable binary releases for the underlying multitouch framework.