feat: add triangle badge shape

example/.flutter-plugins-dependencies

@@ -1 +1 @@
-{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"integration_test","path":"/Users/yadaniyil/flutter/packages/integration_test/","native_build":true,"dependencies":[]}],"android":[{"name":"integration_test","path":"/Users/yadaniyil/flutter/packages/integration_test/","native_build":true,"dependencies":[]}],"macos":[],"linux":[],"windows":[],"web":[]},"dependencyGraph":[{"name":"integration_test","dependencies":[]}],"date_created":"2023-03-24 12:03:15.082040","version":"3.7.6"}
+{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"integration_test","path":"/Users/vitalii/flutter3/flutter/packages/integration_test/","native_build":true,"dependencies":[]}],"android":[{"name":"integration_test","path":"/Users/vitalii/flutter3/flutter/packages/integration_test/","native_build":true,"dependencies":[]}],"macos":[],"linux":[],"windows":[],"web":[]},"dependencyGraph":[{"name":"integration_test","dependencies":[]}],"date_created":"2023-04-03 12:55:06.152967","version":"3.7.0"}

example/lib/alarm_app.dart

@@ -17,18 +17,33 @@ class _AlarmAppState extends State<AlarmApp> {
   @override
   Widget build(BuildContext context) {
     return badges.Badge(
-      badgeStyle: badges.BadgeStyle(padding: EdgeInsets.all(7)),
+      badgeStyle: badges.BadgeStyle(
+        borderSide: BorderSide(color: Colors.white, width: 2),
+        shape: badges.BadgeShape.triangle,
+        badgeGradient: badges.BadgeGradient.linear(
+          colors: [
+            Colors.red,
+            Colors.orange,
+          ],
+          begin: Alignment.topLeft,
+          end: Alignment.bottomRight,
+        ),
+      ),
       badgeAnimation: badges.BadgeAnimation.fade(
         animationDuration: Duration(seconds: 1),
         loopAnimation: _isLooped,
       ),
-      // onTap: () {
-      //   setState(() => _isLooped = !_isLooped);
-      // },
       ignorePointer: false,
-      // toAnimate: false,
-      badgeContent:
-          Text(counter.toString(), style: TextStyle(color: Colors.white)),
+      badgeContent: Container(
+          width: 20,
+          height: 20,
+          child: Padding(
+            padding: const EdgeInsets.only(left: 8),
+            child: Text(
+              '!',
+              style: TextStyle(color: Colors.white),
+            ),
+          )),
       position: badges.BadgePosition.topEnd(top: -12),
       child: GestureDetector(
         onTap: () {

lib/src/badge.dart

@@ -157,7 +157,8 @@ class BadgeState extends State<Badge> with TickerProviderStateMixin {
             borderRadius: widget.badgeStyle.borderRadius,
           );
     final isCustomShape = widget.badgeStyle.shape == BadgeShape.twitter ||
-        widget.badgeStyle.shape == BadgeShape.instagram;
+        widget.badgeStyle.shape == BadgeShape.instagram ||
+        widget.badgeStyle.shape == BadgeShape.triangle;
 
     final gradientBorder = widget.badgeStyle.borderGradient != null
         ? BadgeBorderGradient(

lib/src/badge_shape.dart

@@ -1,4 +1,5 @@
 import 'package:badges/badges.dart' as badges;
+import 'package:badges/src/painters/triangle_badge_shape_painter.dart';
 import 'package:flutter/material.dart';
 
 /// Set of shapes that you can use for your [badges.Badge] widget.
@@ -15,6 +16,10 @@ enum BadgeShape {
   /// * [RoundedRectangleBorder]
   square,
 
+  /// To make the triangle badge .
+  /// See [TriangleBadgeShapePainter] for more details.
+  triangle,
+
   /// To make the  twitter badge .
   /// See [TwitterBadgeShapePainter] for more details.
   twitter,

lib/src/painters/triangle_badge_shape_painter.dart

@@ -0,0 +1,72 @@
+import 'package:badges/badges.dart';
+import 'package:badges/src/utils/gradient_utils.dart';
+import 'package:flutter/material.dart';
+
+class TriangleBadgeShapePainter extends CustomPainter {
+  Color? color;
+  BadgeGradient? badgeGradient;
+  BadgeGradient? borderGradient;
+  BorderSide? borderSide;
+
+  TriangleBadgeShapePainter({
+    Key? key,
+    this.color = Colors.blue,
+    this.badgeGradient,
+    this.borderGradient,
+    this.borderSide,
+  });
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    final width = size.width;
+    final height = size.height;
+
+    Path path = Path();
+    Paint paint = Paint();
+    Paint paintBorder = Paint();
+
+    if (badgeGradient != null) {
+      paint.shader = GradientUtils.getGradientShader(
+        badgeGradient: badgeGradient!,
+        width: width,
+        height: height,
+      );
+    }
+    paintBorder
+      ..color = borderSide?.color ?? Colors.white
+      ..style = PaintingStyle.stroke
+      ..strokeCap = StrokeCap.round
+      ..strokeWidth = borderSide?.width ?? 0;
+
+    if (borderGradient != null) {
+      paintBorder.shader = GradientUtils.getGradientShader(
+        badgeGradient: borderGradient!,
+        width: width,
+        height: height,
+      );
+    }
+    path
+      ..moveTo(width * 0.132, height * 0.888)
+      ..arcToPoint(Offset(width * 0.075, height * 0.772),
+          radius: Radius.circular(height * 0.09))
+      ..lineTo(width * 0.428, height * 0.156)
+      ..arcToPoint(Offset(width * 0.582, height * 0.156),
+          radius: Radius.circular(height * 0.09))
+      ..lineTo(width * 0.928, height * 0.756)
+      ..arcToPoint(Offset(width * 0.868, height * 0.888),
+          radius: Radius.circular(height * 0.09))
+      ..lineTo(width * 0.132, height * 0.888);
+    path.close();
+
+    paint.color = color!;
+    canvas.drawPath(path, paint);
+    if (borderSide != BorderSide.none) {
+      canvas.drawPath(path, paintBorder);
+    }
+  }
+
+  @override
+  bool shouldRepaint(covariant CustomPainter oldDelegate) {
+    return true;
+  }
+}

lib/src/utils/drawing_utils.dart

@@ -1,5 +1,6 @@
 import 'package:badges/badges.dart';
 import 'package:badges/src/painters/instagram_badge_shape_painter.dart';
+import 'package:badges/src/painters/triangle_badge_shape_painter.dart';
 import 'package:badges/src/painters/twitter_badge_shape_painter.dart';
 import 'package:flutter/material.dart';
 
@@ -26,6 +27,13 @@ class DrawingUtils {
           borderSide: borderSide,
           borderGradient: borderGradient,
         );
+      case BadgeShape.triangle:
+        return TriangleBadgeShapePainter(
+          color: color,
+          badgeGradient: badgeGradient,
+          borderSide: borderSide,
+          borderGradient: borderGradient,
+        );
       case BadgeShape.square:
       case BadgeShape.circle:
         break;

test/badges_test.dart

@@ -2,6 +2,7 @@ import 'package:badges/badges.dart' as badges;
 import 'package:badges/src/badge_border_gradient.dart';
 import 'package:badges/src/badge_gradient_type.dart';
 import 'package:badges/src/painters/instagram_badge_shape_painter.dart';
+import 'package:badges/src/painters/triangle_badge_shape_painter.dart';
 import 'package:badges/src/painters/twitter_badge_shape_painter.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -334,6 +335,76 @@ void main() {
         expect(painter.shouldRepaint(painter), true);
       });
     });
+
+    group('Triangle shape', () {
+      const triangleBadge = badges.Badge(
+        badgeStyle: badges.BadgeStyle(
+          shape: badges.BadgeShape.triangle,
+          badgeColor: Colors.green,
+          badgeGradient:
+              badges.BadgeGradient.radial(colors: [Colors.black, Colors.green]),
+          borderGradient:
+              badges.BadgeGradient.linear(colors: [Colors.red, Colors.yellow]),
+          borderSide: BorderSide(width: 2),
+        ),
+      );
+
+      testWidgets('Triangle badge should render correctly', (tester) async {
+        await tester.pumpWidget(_wrapWithMaterialApp(triangleBadge));
+        expect(find.byType(badges.Badge), findsOneWidget);
+        expect(find.byType(CustomPaint), findsWidgets);
+      });
+
+      testWidgets('Triangle badge color should match', (tester) async {
+        await tester.pumpWidget(_wrapWithMaterialApp(triangleBadge));
+
+        final customPaint =
+            tester.widgetList<CustomPaint>(find.byType(CustomPaint)).last;
+        final painter = customPaint.painter as TriangleBadgeShapePainter;
+        expect(painter.color, Colors.green);
+      });
+
+      testWidgets('Triangle badge gradient should match', (tester) async {
+        await tester.pumpWidget(_wrapWithMaterialApp(triangleBadge));
+        final customPaint =
+            tester.widgetList<CustomPaint>(find.byType(CustomPaint)).last;
+        final painter = customPaint.painter as TriangleBadgeShapePainter;
+        expect(painter.badgeGradient?.gradientType, BadgeGradientType.radial);
+        expect(painter.badgeGradient?.colors.first, Colors.black);
+        expect(painter.badgeGradient?.colors.last, Colors.green);
+        expect(painter.badgeGradient?.colors.length, 2);
+      });
+
+      testWidgets('Triangle badge border gradient should match',
+          (tester) async {
+        await tester.pumpWidget(_wrapWithMaterialApp(triangleBadge));
+        final customPaint =
+            tester.widgetList<CustomPaint>(find.byType(CustomPaint)).last;
+        final painter = customPaint.painter as TriangleBadgeShapePainter;
+        expect(painter.borderGradient?.gradientType, BadgeGradientType.linear);
+        expect(painter.borderGradient?.colors.first, Colors.red);
+        expect(painter.borderGradient?.colors.last, Colors.yellow);
+        expect(painter.borderGradient?.colors.length, 2);
+      });
+
+      testWidgets('Triangle badge border should match', (tester) async {
+        await tester.pumpWidget(_wrapWithMaterialApp(triangleBadge));
+        final customPaint =
+            tester.widgetList<CustomPaint>(find.byType(CustomPaint)).last;
+        final painter = customPaint.painter as TriangleBadgeShapePainter;
+        expect(painter.borderSide?.width, 2);
+        expect(painter.borderSide?.style, BorderStyle.solid);
+        expect(painter.borderSide?.strokeAlign, BorderSide.strokeAlignInside);
+      });
+
+      testWidgets('Triangle badge repaint should match', (tester) async {
+        await tester.pumpWidget(_wrapWithMaterialApp(triangleBadge));
+        final customPaint =
+            tester.widgetList<CustomPaint>(find.byType(CustomPaint)).last;
+        final painter = customPaint.painter as TriangleBadgeShapePainter;
+        expect(painter.shouldRepaint(painter), true);
+      });
+    });
   });
 
   group('Badge tests', () {