initial commit

2026-07-27 14:42:23 +02:00
commit 833c68a189
257 changed files with 17947 additions and 0 deletions
@@ -0,0 +1,106 @@
+import 'dart:math' as math;
+
+import 'package:flutter/material.dart';
+
+import '../theme/theme_x.dart';
+
+/// A single-series trend line — currently just backup-duration history.
+/// Hand-rolled `CustomPainter` rather than a charting dependency: one chart
+/// in the whole app, a specific visual spec (faint grid, thin line,
+/// emphasized endpoint), full control for near-zero cost.
+class Sparkline extends StatelessWidget {
+  const Sparkline({super.key, required this.values, this.width = 240, this.height = 52});
+
+  final List<double> values;
+  final double width;
+  final double height;
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      width: width,
+      height: height,
+      child: CustomPaint(
+        painter: _SparklinePainter(
+          values: values,
+          lineColor: context.colors.primary,
+          gridColor: context.colors.outlineVariant,
+        ),
+      ),
+    );
+  }
+}
+
+class _SparklinePainter extends CustomPainter {
+  _SparklinePainter({required this.values, required this.lineColor, required this.gridColor});
+
+  final List<double> values;
+  final Color lineColor;
+  final Color gridColor;
+
+  static const _topPad = 6.0;
+  static const _bottomPad = 6.0;
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    if (values.isEmpty) return;
+
+    final minV = values.reduce(math.min);
+    final maxV = values.reduce(math.max);
+    final range = (maxV - minV).abs() < 1e-9 ? 1.0 : maxV - minV;
+    final plotHeight = size.height - _topPad - _bottomPad;
+
+    final gridPaint = Paint()
+      ..color = gridColor
+      ..strokeWidth = 1;
+    canvas.drawLine(Offset(0, _topPad), Offset(size.width, _topPad), gridPaint);
+    canvas.drawLine(
+      Offset(0, size.height - _bottomPad),
+      Offset(size.width, size.height - _bottomPad),
+      gridPaint,
+    );
+
+    if (values.length == 1) {
+      final y = _topPad + plotHeight / 2;
+      canvas.drawCircle(Offset(size.width, y), 3.4, Paint()..color = lineColor);
+      return;
+    }
+
+    final dx = size.width / (values.length - 1);
+    final points = [
+      for (var i = 0; i < values.length; i++)
+        Offset(i * dx, _topPad + plotHeight - ((values[i] - minV) / range) * plotHeight),
+    ];
+
+    final fillPath = Path()..moveTo(points.first.dx, size.height - _bottomPad);
+    for (final p in points) {
+      fillPath.lineTo(p.dx, p.dy);
+    }
+    fillPath
+      ..lineTo(points.last.dx, size.height - _bottomPad)
+      ..close();
+    canvas.drawPath(fillPath, Paint()..color = lineColor.withValues(alpha: 0.14));
+
+    final linePath = Path()..moveTo(points.first.dx, points.first.dy);
+    for (final p in points.skip(1)) {
+      linePath.lineTo(p.dx, p.dy);
+    }
+    canvas.drawPath(
+      linePath,
+      Paint()
+        ..color = lineColor
+        ..style = PaintingStyle.stroke
+        ..strokeWidth = 2
+        ..strokeCap = StrokeCap.round
+        ..strokeJoin = StrokeJoin.round,
+    );
+
+    canvas.drawCircle(points.last, 3.4, Paint()..color = lineColor);
+  }
+
+  @override
+  bool shouldRepaint(covariant _SparklinePainter oldDelegate) =>
+      oldDelegate.values != values ||
+      oldDelegate.lineColor != lineColor ||
+      oldDelegate.gridColor != gridColor;
+}