Tutorial by Examples: anima

Make an Image tappable by adding a TapGestureRecognizer

There are a couple of default recognizers available in Xamarin.Forms, one of them is the TapGestureRecognizer. You can add them to virtually any visual element. Have a look at a simple implementation which binds to an Image. Here is how to do it in code. var tappedCommand = new Command(() => {...

Xamarin.Forms • Gestures

Zoom an Image with the Pinch gesture

In order to make an Image (or any other visual element) zoomable we have to add a PinchGestureRecognizer to it. Here is how to do it in code: var pinchGesture = new PinchGestureRecognizer(); pinchGesture.PinchUpdated += (s, e) => { // Handle the pinch }; image.GestureRecognizers.Add(pi...

Xamarin.Forms • Gestures

TransitionDrawable animation

This example displays a transaction for an image view with only two images.(can use more images as well one after the other for the first and second layer positions after each transaction as a loop) add a image array to res/values/arrays.xml <resources> <array name=&...

Android • Animators

Getting binary representation of an image file

This example is inspired by this question. We'll assume you know how to load a file using the File API. // preliminary code to handle getting local file and finally printing to console // the results of our function ArrayBufferToBinary(). var file = // get handle to local file. var reader = new...

JavaScript • Binary Data

Animating a sprite sheet

A sprite sheet by definition is a bitmap that contains a certain animation. Old games use grid type sprite sheet, that is, every frame occupies an equal region, and frames are aligned by the edges to form a rectangle, probably with some spaces unoccupied. Later, in order to minimize the bitmap size,...

ActionScript 3 • Drawing Bitmaps

Animate data change

RecyclerView will perform a relevant animation if any of the "notify" methods are used except for notifyDataSetChanged; this includes notifyItemChanged, notifyItemInserted, notifyItemMoved, notifyItemRemoved, etc. The adapter should extend this class instead of RecyclerView.Adapter. impo...

Android • RecyclerView

Animate an Image

class AnimatedImage extends Component { constructor(props){ super(props) this.state = { logoMarginTop: new Animated.Value(200) } } componentDidMount(){ Animated.timing( this.state.logoMarginTop, { toValue: 100 ...

react-native • Animation API

ValueAnimator

ValueAnimator introduces a simple way to animate a value (of a particular type, e.g. int, float, etc.). The usual way of using it is: Create a ValueAnimator that will animate a value from min to max Add an UpdateListener in which you will use the calculated animated value (which you can obtain ...

Android • Animators

ObjectAnimator

ObjectAnimator is a subclass of ValueAnimator with the added ability to set the calculated value to the property of a target View. Just like in the ValueAnimator, there are two ways you can create the ObjectAnimator: (the example code animates an alpha of a View from 0.4f to 0.2f in 250ms) Fr...

Android • Animators

ViewPropertyAnimator

ViewPropertyAnimator is a simplified and optimized way to animate properties of a View. Every single View has a ViewPropertyAnimator object available through the animate() method. You can use that to animate multiple properties at once with a simple call. Every single method of a ViewPropertyAnimat...

Android • Animators

Disable Animations

CALayer property animations are enabled by default. When this is undesirable, they can be disabled as follows. Swift CATransaction.begin() CATransaction.setDisableActions(true) // change layer properties that you don't want to animate CATransaction.commit() Objective-C [CATransaction be...

iOS • CALayer

Upload an image or a video to S3 using AWS SDK

Before starting with the example I'd recommend to create a Singleton with a delegate class member so you could achieve a use case of uploading a file in the background and let the user keep using your app while the files are being uploaded even when the app is the background. Let's start, first, we...

iOS • AWS SDK

Animate at a specified interval (add a new rectangle every 1 second)

This example adds a new rectangle to the canvas every 1 second (== a 1 second interval) Annotated Code: <!doctype html> <html> <head> <style> body{ background-color:white; } #canvas{border:1px solid red; } </style> <script> window.onload=(functio...

html5-canvas • Animation

Animate at a specified time (an animated clock)

This example animates a clock showing the seconds as a filled wedge Annotated Code: <!doctype html> <html> <head> <style> body{ background-color:white; } #canvas{border:1px solid red; } </style> <script> window.onload=(function(){ // canva...

html5-canvas • Animation

Use requestAnimationFrame() NOT setInterval() for animation loops

requestAnimationFrame is similar to setInterval, it but has these important improvements: The animation code is synchronized with display refreshes for efficiency The clear + redraw code is scheduled, but not immediately executed. The browser will execute the clear + redraw code only when the d...

html5-canvas • Animation

Animate an image across the Canvas

This example loads and animates and image across the Canvas Important Hint! Make sure you give your image time to fully load by using image.onload. Annotated Code <!doctype html> <html> <head> <style> body{ background-color:white; } #canvas{border:1px solid re...

html5-canvas • Animation

Don't draw animations in your event handlers (a simple sketch app)

During mousemove you get flooded with 30 mouse events per second. You might not be able to redraw your drawings at 30 times per second. Even if you can, you're probably wasting computing power by drawing when the browser is not ready to draw (wasted == across display refresh cycles). Therefore it m...

html5-canvas • Animation

UIColor from an image pattern

You can create a UIColor object using an image pattern by using the UIColor(patternImage:_) method. btn.backgroundColor = UIColor(patternImage: UIImage(named: "image")!)

iOS • UIColor

Drawing and a basic animation

This program draws some shapes and 'hello world!' and let an image go to every corner of the window. the complete code: import pygame,sys from pygame.locals import * pygame.init() FPS = 30 #frames per second setting fpsClock = pygame.time.Clock() #set up the window screen = pygame.disp...

pygame • The essentials

Animation with callback

Sometimes we need to change words position from one place to another or reduce size of the words and change the color of words automatically to improve the attraction of our website or web apps. JQuery helps a lot with this concept using fadeIn(), hide(), slideDown() but its functionality are limite...

jQuery • jQuery .animate() Method