August 2022
Beginner
912 pages
19h 57m
English
Content preview from Coding All-in-One For Dummies, 2nd Edition
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Chapter 9
Moving Right Along …
IN THIS CHAPTER
Creating animation
Mixing other people's code with your own code
Animating size and color changes
Dragging widgets without dropping them or breaking them
This chapter is about animation — making things change right before the user's eyes. When I think about animation, I immediately think of movement, but Flutter provides a much broader definition of animation. With Flutter, you can change almost any property of a widget on almost any time scale.
Setting the Stage for Flutter Animation
This chapter's first listing has a bunch of reusable code. Subsequent listings contain code that works cooperatively with the code in the first listing. Thanks to Dart's extensions feature, each new listing can create methods belonging to the first listing's classes. You can read all about Dart extensions in Book 4, Chapter 8.
The code in Listing 9-1 can't do anything on its own. Instead, this code relies on declarations in the chapter's other listings.
LISTING 9-1: Reuse This Code
// app09main.dartimport 'package:flutter/material.dart';import 'app0902.dart'; ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.