Akiba So
3febbd1431
All checks were successful
CI / Windows build (push) Successful in 8m22s
Clean-room reimplementation of Saber's input model: we own the gesture pipeline so pen draws with real pressure (perfect_freehand), two-finger pinch zooms/pans, and palm is rejected (stylus-priority, 2nd-pointer cancels stroke). pdfrx renders one page at a time (PdfPageView, no gestures) under a shared transform; page-based nav. Material You theme via dynamic_color (system accent + seed fallback) and a floating tonal tool palette + page pill. Old pdfrx-overlay spike no longer wired.
48 lines
1.3 KiB
Dart
48 lines
1.3 KiB
Dart
// lib/editor/canvas/pen_stroke.dart
|
|
//
|
|
// Pen-first canvas stroke model. Points are stored in NORMALIZED page
|
|
// coordinates ([0,1] x [0,1] relative to the page rectangle) so strokes stay
|
|
// pinned to the page regardless of zoom/pan or the on-screen page size.
|
|
|
|
import 'package:flutter/foundation.dart';
|
|
|
|
/// A single captured sample of a stroke.
|
|
///
|
|
/// [x]/[y] are normalized to the page rectangle ([0,1]).
|
|
/// [pressure] is the normalized stylus pressure ([0,1]) or null when the
|
|
/// device reported no usable pressure (perfect_freehand then simulates it).
|
|
@immutable
|
|
class PenPoint {
|
|
const PenPoint(this.x, this.y, this.pressure);
|
|
|
|
final double x;
|
|
final double y;
|
|
final double? pressure;
|
|
}
|
|
|
|
/// Which kind of mark a stroke is.
|
|
enum PenStrokeKind { pen, highlighter }
|
|
|
|
/// A committed stroke for a single page, in normalized page coordinates.
|
|
@immutable
|
|
class PenStroke {
|
|
const PenStroke({
|
|
required this.points,
|
|
required this.color,
|
|
required this.width,
|
|
required this.kind,
|
|
});
|
|
|
|
/// Normalized points (see [PenPoint]).
|
|
final List<PenPoint> points;
|
|
|
|
/// ARGB color value.
|
|
final int color;
|
|
|
|
/// Stroke width expressed as a fraction of the page width, so it scales with
|
|
/// the page when zoomed. Multiply by the on-screen page width to get pixels.
|
|
final double width;
|
|
|
|
final PenStrokeKind kind;
|
|
}
|