Making reusable flutter widget

Question

I've been trying to make my custom widget reusable but kept on hitting dead ends... I want to be able to use change the colors of the icons, text within the card, the first card, and the enclosed card... Also, I should be able to change the icons, text that is within the icon and also the on tap function for each of the buttons should be able to do something different whenever it's tapped

   class _CustomCardState extends State<CustomCard> {
      @override
      Widget build(BuildContext context) {
        return Card(
          margin: EdgeInsets.fromLTRB(20, 10, 20, 1),
          color: Colors.red,
          child: InkWell(
            onTap: (){},
            child: ListTile(
              leading: Card(
                color: Colors.white,
                margin: EdgeInsets.all(5),
                child: Padding(
                  padding: EdgeInsets.all(8.0),
                  child: Icon(
                    KycIcons.add_a_photo,
                    size: 20,
                    color: Colors.red,
                  ),
                ),
              ),
              title: Text('Uplaod your selfie',
                  style: TextStyle(color: Colors.white, fontSize: 16)),
            ),
          ),
        );
      }
    }`

Please reformat your sample code so we can understand what is going on. — Roslan Amir
– Roslan Amir, Commented Nov 6, 2021 at 15:00

ישו אוהב אותך · Accepted Answer · 2021-11-06 14:59:53Z

6

Here is a very simple example of how you can build reusable widgets:

import 'package:flutter/material.dart';

class ContainerMain extends StatelessWidget {
  String text;
  Color color; 

  ContainerMain(this.text, {this.color = Colors.white});

  @override
  Widget build(BuildContext context) {
    Size size = MediaQuery.of(context).size;
    return Container(
      alignment: Alignment.center,
      height: size.height / 10,
      width: size.width,
      child: Text(
        text,
        style: TextStyle(fontSize: 20, color: color),
      ),
    );
  }
}

edited Nov 6, 2021 at 14:59

ישו אוהב אותך

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answered Nov 6, 2021 at 14:58

Will

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2 Comments

ישו אוהב אותך Over a year ago

related link: dart.dev/guides/language/language-tour#classes

Roslan Amir Over a year ago

The idea is to provide optional arguments that the caller can pass in to your widget. In the above example, text and color are the arguments. You can add more if you have more to customize.

Roslan Amir · Accepted Answer · 2021-11-06 15:39:41Z

Here is my contribution to your class. BTW, it should be a StatelessWidget instead of a StatefulWidget since there are no state variables involved.

import 'package:flutter/material.dart';

class CustomCard extends StatefulWidget {
  final Color iconColor;
  final double iconSize;
  final Color cardColor;
  final Color innerCardColor;
  final String title;
  final TextStyle style;
  final void Function()? onTap;

  const CustomCard({
    Key? key,
    this.iconColor = Colors.red,
    this.iconSize = 20.0,
    this.cardColor = Colors.red,
    this.innerCardColor = Colors.white,
    this.title = 'Upload your selfie',
    this.style = const TextStyle(color: Colors.white, fontSize: 16),
    this.onTap,
  }) : super(key: key);

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

class _CustomCardState extends State<CustomCard> {
  @override
  Widget build(BuildContext context) {
    return Card(
      margin: const EdgeInsets.fromLTRB(20, 10, 20, 1),
      color: widget.cardColor,
      child: InkWell(
        child: ListTile(
          leading: Card(
            color: widget.innerCardColor,
            margin: const EdgeInsets.all(5),
            child: Padding(
              padding: const EdgeInsets.all(8.0),
              child: Icon(
                KycIcons.add_a_photo,
                size: iconSize,
                color: widget.iconColor,
              ),
            ),
          ),
          title: Text(widget.title, style: widget.style),
          onTap: widget.onTap,
        ),
      ),
    );
  }
}

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