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BadNote/windows/runner/pen_channel.h

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feat(pen): pressure-responsive width, configurable thinning, native Windows pen (tilt/buttons) W1 — Custom pen width + pressure sensitivity (Saber-style): - Root cause of "压感没用": perfect_freehand 1.0.4 IGNORES real stylus pressure (hardcodes radius=size/2 when simulatePressure=false) — width never tracked pen force. Upgraded perfect_freehand ^1.0.0 -> ^2.0.0 (honors real pressure); migrated all 5 getStroke call sites to the 2.x API (PointVector / StrokeOptions / Offset). - De-hardcoded `thinning` into `kDefaultPenThinning` (0.85), single source shared by the on-screen painter and the PDF export path; exposed as PenConfig.pressureSensitivity with a Pressure Sensitivity slider; live-applies via a config listener. W3 — Native Windows pen plugin (tilt + barrel/eraser buttons): - windows/runner/pen_channel.{h,cpp}: observe WM_POINTER at the TOP of MessageHandler (before HandleTopLevelWindowProc, which Flutter uses to consume pen events), read GetPointerPenInfo penFlags + tilt, stream over EventChannel('badnote/pen'); non-consuming. - PenInputService: single latched hardware state (no Win32-pointerId<->event.pointer correlation); graceful no-op off-Windows. - pen_canvas maps barrel/inverted/eraser through PenConfig.sideButton/eraserEnd (eraser/undo/toggleTool/pan) and captures tilt into PenPoint.tilt -> EditorPoint.tilt. W2 — Zoom flicker: page raster isolated in its own RepaintBoundary (safe interim); definitive crisp-on-zoom fix gated on the on-device root-cause probe (plan M3). Plans: ralplan-consensus plan at docs/plans/2026-06-22-badnote-pen-polish.md (Architect APPROVE-WITH-MUST-FIX M1-M4 + Critic ITERATE->APPROVE). Tests: 58/58 pass incl. shared-thinning invariant + thinning-affects-outline + tilt-adapter round-trip. flutter analyze clean; linux debug build OK. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-22 02:10:05 +08:00
#ifndef RUNNER_PEN_CHANNEL_H_
#define RUNNER_PEN_CHANNEL_H_
#include <windows.h>
namespace flutter {
class FlutterEngine;
}
void RegisterPenChannel(flutter::FlutterEngine* engine);
void ObservePenMessage(UINT message, WPARAM wparam, LPARAM lparam);
#endif // RUNNER_PEN_CHANNEL_H_