111 lines
3.1 KiB
Dart
111 lines
3.1 KiB
Dart
import 'dart:ui' as ui;
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import 'package:aves_model/aves_model.dart';
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import 'package:flutter/material.dart';
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class FixedExtentGridPainter extends CustomPainter {
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final TileLayout tileLayout;
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final Offset tileCenter;
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final Size tileSize;
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final double spacing, horizontalPadding, borderWidth;
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final Radius borderRadius;
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final Color color;
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final TextDirection textDirection;
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const FixedExtentGridPainter({
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required this.tileLayout,
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required this.tileCenter,
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required this.tileSize,
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required this.spacing,
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required this.horizontalPadding,
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required this.borderWidth,
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required this.borderRadius,
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required this.color,
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required this.textDirection,
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});
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@override
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void paint(Canvas canvas, Size size) {
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late final Offset chipCenter;
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late final Size chipSize;
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late final int deltaColumn;
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late final Shader strokeShader;
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switch (tileLayout) {
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case TileLayout.mosaic:
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return;
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case TileLayout.grid:
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chipCenter = tileCenter;
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chipSize = tileSize;
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deltaColumn = 2;
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strokeShader = ui.Gradient.radial(
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tileCenter,
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chipSize.shortestSide * 2,
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[
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color,
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Colors.transparent,
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],
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[
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.8,
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1,
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],
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);
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case TileLayout.list:
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chipSize = Size.square(tileSize.shortestSide);
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final chipCenterToEdge = chipSize.width / 2;
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chipCenter = Offset(textDirection == TextDirection.rtl ? size.width - (chipCenterToEdge + horizontalPadding) : chipCenterToEdge + horizontalPadding, tileCenter.dy);
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deltaColumn = 0;
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strokeShader = ui.Gradient.linear(
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tileCenter - Offset(0, chipSize.shortestSide * 3),
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tileCenter + Offset(0, chipSize.shortestSide * 3),
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[
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Colors.transparent,
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color,
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color,
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Colors.transparent,
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],
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[
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0,
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.2,
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.8,
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1,
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],
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);
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}
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final strokePaint = Paint()
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..style = PaintingStyle.stroke
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..strokeWidth = borderWidth
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..shader = strokeShader;
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final fillPaint = Paint()
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..style = PaintingStyle.fill
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..color = color.withAlpha((255.0 * .25).round());
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final chipWidth = chipSize.width;
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final chipHeight = chipSize.height;
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final deltaX = tileSize.width + spacing;
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final deltaY = tileSize.height + spacing;
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for (var i = -deltaColumn; i <= deltaColumn; i++) {
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final dx = deltaX * i;
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for (var j = -2; j <= 2; j++) {
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if (i == 0 && j == 0) continue;
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final dy = deltaY * j;
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final rect = RRect.fromRectAndRadius(
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Rect.fromCenter(
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center: chipCenter + Offset(dx, dy),
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width: chipWidth - borderWidth,
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height: chipHeight - borderWidth,
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),
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borderRadius,
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);
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if ((i.abs() == 1 && j == 0) || (j.abs() == 1 && i == 0)) {
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canvas.drawRRect(rect, fillPaint);
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}
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canvas.drawRRect(rect, strokePaint);
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}
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}
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}
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@override
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bool shouldRepaint(covariant CustomPainter oldDelegate) => true;
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}
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