Get Child`s Rectangle information After Rendered In Flutter

A widget provide a simple way to get child's rectangle information after rendered.

Usage

To use this plugin, add rect_getter as a dependency in your pubspec.yaml file.

Example

// Import package
import 'package:rect_getter/rect_getter.dart';

// Instantiate it

var globalKey = RectGetter.createGlobalKey();
var rectGetter = RectGetter(
    key: globalKey,
    child: _child,
);

or

var rectGetter = RectGetter.defaultKey(
    child: _child,
);


// and add it to your layout .

// then you can get rect by

Rect rect = rectGetter.getRect();

or

Rect rect = RectGetter.getRectFromKey(globalKey);

Read More : 利用RectGetter组件获取控件位置尺寸实现的几个高级效果和功能

Getting Started

For help getting started with Flutter, view our online documentation.

For help on editing package code, view the documentation.

Use this package as a library

Depend on it

Run this command:

With Flutter:

 $ flutter pub add rect_getter

This will add a line like this to your package's pubspec.yaml (and run an implicit flutter pub get):

dependencies:
  rect_getter: ^1.1.0

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:rect_getter/rect_getter.dart';

example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'dart:math' show Random;

import 'package:rect_getter/rect_getter.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Random random = Random();

  var _counter = 21;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: GridView.builder(
        gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 3,
        ),
        itemCount: _counter,
        itemBuilder: (BuildContext context, int index) {
          if (index == _counter - 1) {
            Timer(Duration.zero, () {
              setState(() {
                _counter += 21;
              });
            });
          }

          var globalKey = RectGetter.createGlobalKey();
          return FittedBox(
            child: RectGetter(
              key: globalKey,
              child: GestureDetector(
                onTap: () {
                  var rect = RectGetter.getRectFromKey(globalKey);
                  ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('$index : ${rect.toString()}')));
                },
                child: Container(
                  color: Colors.primaries[index % Colors.primaries.length],
                  width: random.nextInt(100) + 100.0,
                  height: random.nextInt(150) + 150.0,
                  child: Center(
                    child: Text('$index'),
                  ),
                ),
              ),
            ),
          );
        },
      ),
    );
  }
}

Download details:

Author: debuggerx.com

Source: https://github.com/debuggerx01/rect_getter

#flutter #ui #plugin #android #ios #web-development #web