April 2026 monthly summary for the slint-ui/slint repository. Focused on compiler determinism and property analysis robustness to improve reproducibility and diagnostics across runs and platforms.

March 2026 (2026-03) monthly summary for slint-ui/slint. Delivered core UI layout testing enhancements, gesture support, and backend testing infrastructure improvements. Key features include Layout Kind support with a standardized LayoutKind enum, layout_kind() exposure on ElementHandle, and encoding of layout kind in compiler debug output to help testing differentiate layout elements from rectangles. Fixed a query instruction bug to correctly match inherited base types, improving type matching. Qt backend gained pinch and rotation gesture support via QPinchGesture with corrected rotation handling. Testing backend infrastructure was modernized by migrating from quick-protobuf to prost/protox, adding pbjson-build for serde impls, and tightening configuration guards and metadata.

February 2026 milestones: Delivered cross‑platform pinch-to-zoom and rotation through PinchGestureHandler with smart magnification, including a demo UI and multi‑platform gesture state display for macOS, iOS, Android, and Linux KMS. Implemented gesture synthesis (Pinch, Rotation, DoubleTap) from raw multi‑touch input via a fixed‑capacity TouchState, enabling consistent input handling on backends lacking native gestures and eliminating heap allocations. Added native-gestures example and tightened backend integration (Android, Linux KMS, Winit) with improved coordinate handling and rotation delta normalization. Reduced maintenance burden by propagating unstable-wgpu-28 feature to femtovg to remove dead-code warnings in WgpuTextureBackend, aligning with how unstable-wgpu-27 is configured. Overall impact: richer, more consistent gesture experiences across platforms and cleaner builds, enabling faster UI iteration and improved performance.

January 2026 performance snapshot: a cross-repo set of developer-focused improvements delivering clearer documentation, deeper engine integration with Bevy, and solid stability gains, underpinned by compiler and proc-macro enhancements and targeted bug fixes. These efforts improve onboarding, accelerate integration with game engines, enhance rendering capabilities, and tighten the toolchain stability for CI and production builds.