91 lines
2.3 KiB
Dart
91 lines
2.3 KiB
Dart
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import 'dart:core';
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import 'dart:ui';
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class MouseCursorPainter extends CustomPainter {
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MouseCursorPainter({required this.offset, this.factor = 64.0});
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final Offset offset;
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final double factor;
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@override
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void paint(Canvas canvas, Size size) {
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final path = Path()
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..moveTo(offset.dx, offset.dy)
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..lineTo(offset.dx, offset.dy + 48 * factor / 64)
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..lineTo(offset.dx + 34 * factor / 64, offset.dy + 34 * factor / 64)
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..close();
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canvas.drawPath(
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path,
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Paint()
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..color = Colors.black
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..style = PaintingStyle.fill,
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);
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canvas.drawPath(
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path,
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Paint()
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..color = Colors.white
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..style = PaintingStyle.stroke
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..strokeJoin = StrokeJoin.miter
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..strokeWidth = 3.5 * factor / 64,
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);
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}
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@override
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bool shouldRepaint(covariant MouseCursorPainter oldDelegate) {
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return oldDelegate.offset != offset;
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}
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}
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class SoftwareMouseCursor extends StatelessWidget {
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SoftwareMouseCursor({Key? key, required this.child}) : super(key: key);
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final cursorPos = ValueNotifier(Offset.zero);
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final Widget child;
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@override
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Widget build(BuildContext context) {
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return Listener(
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onPointerDown: (event) {
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if (event.kind == PointerDeviceKind.mouse) {
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cursorPos.value = event.position;
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}
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},
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onPointerMove: (event) {
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if (event.kind == PointerDeviceKind.mouse) {
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cursorPos.value = event.position;
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}
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},
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onPointerUp: (event) {
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if (event.kind == PointerDeviceKind.mouse) {
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cursorPos.value = event.position;
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}
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},
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onPointerHover: (event) {
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if (event.kind == PointerDeviceKind.mouse) {
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cursorPos.value = event.position;
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}
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},
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behavior: HitTestBehavior.translucent,
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child: ValueListenableBuilder<Offset>(
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valueListenable: cursorPos,
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builder: (context, pos, child) {
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return CustomPaint(
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foregroundPainter: MouseCursorPainter(
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offset: pos,
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factor: window.devicePixelRatio * 64,
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),
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child: child,
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);
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},
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child: RepaintBoundary(
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child: child,
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),
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),
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);
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}
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}
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