How to Draw a Triangle using Canvas in Flutter?

This Article is posted by seven.srikanth at 14-08-2019 11:16:44

In this article, I'm going to share the code for creating a Triangle using Canvas in Flutter as below.
Here is the code to create a Triangle using canvas. In order to generate the output, all you need to do is, put this code inside the main.dart file in your newly created flutter project.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Drawing Traingle with FLutter'),
body: Center(
child: CustomPaint(
size: Size(200, 200),
painter: DrawTriangle()
class DrawTriangle extends CustomPainter {
Paint _paint;
DrawTriangle() {
_paint = Paint()
..color = = PaintingStyle.fill;
void paint(Canvas canvas, Size size) {
var path = Path();
path.moveTo(size.width/2, 0);
path.lineTo(0, size.height);
path.lineTo(size.height, size.width);
canvas.drawPath(path, _paint);
bool shouldRepaint(CustomPainter oldDelegate) {
return false;
Hope this example will be useful to you.

Tags: Triangle; Canvas;

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