diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9d7edcf --- /dev/null +++ b/.gitignore @@ -0,0 +1,70 @@ +# Miscellaneous +*.class +*.log +*.pyc +*.swp +.DS_Store +.atom/ +.buildlog/ +.history +.svn/ + +# IntelliJ related +*.iml +*.ipr +*.iws +.idea/ + +# Visual Studio Code related +.vscode/ + +# Flutter/Dart/Pub related +**/doc/api/ +.dart_tool/ +.flutter-plugins +.packages +.pub-cache/ +.pub/ +build/ + +# Android related +**/android/**/gradle-wrapper.jar +**/android/.gradle +**/android/captures/ +**/android/gradlew +**/android/gradlew.bat +**/android/local.properties +**/android/**/GeneratedPluginRegistrant.java + +# iOS/XCode related +**/ios/**/*.mode1v3 +**/ios/**/*.mode2v3 +**/ios/**/*.moved-aside +**/ios/**/*.pbxuser +**/ios/**/*.perspectivev3 +**/ios/**/*sync/ +**/ios/**/.sconsign.dblite +**/ios/**/.tags* +**/ios/**/.vagrant/ +**/ios/**/DerivedData/ +**/ios/**/Icon? +**/ios/**/Pods/ +**/ios/**/.symlinks/ +**/ios/**/profile +**/ios/**/xcuserdata +**/ios/.generated/ +**/ios/Flutter/App.framework +**/ios/Flutter/Flutter.framework +**/ios/Flutter/Generated.xcconfig +**/ios/Flutter/app.flx +**/ios/Flutter/app.zip +**/ios/Flutter/flutter_assets/ +**/ios/ServiceDefinitions.json +**/ios/Runner/GeneratedPluginRegistrant.* + +# Exceptions to above rules. +!**/ios/**/default.mode1v3 +!**/ios/**/default.mode2v3 +!**/ios/**/default.pbxuser +!**/ios/**/default.perspectivev3 +!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages diff --git a/.metadata b/.metadata new file mode 100644 index 0000000..5ab1e9a --- /dev/null +++ b/.metadata @@ -0,0 +1,10 @@ +# This file tracks properties of this Flutter project. +# Used by Flutter tool to assess capabilities and perform upgrades etc. +# +# This file should be version controlled and should not be manually edited. + +version: + revision: 7a4c33425ddd78c54aba07d86f3f9a4a0051769b + channel: stable + +project_type: package diff --git a/CHANGELOG.md b/CHANGELOG.md new file mode 100644 index 0000000..045a772 --- /dev/null +++ b/CHANGELOG.md @@ -0,0 +1,12 @@ +# Changelog +All notable changes to this project will be documented in this file. + +The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), +and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). + +## [Unreleased] +- none. + +## [0.1.0] - 2019-07-01 +### Added +- First release. \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..e78b3e9 --- /dev/null +++ b/LICENSE @@ -0,0 +1,9 @@ +Copyright 2019 Grant Skinner + +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: + +1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..d6076e3 --- /dev/null +++ b/README.md @@ -0,0 +1,19 @@ +# ImageFade + +**Requires Flutter 1.6.7 or higher.** + +A widget for Flutter that displays a `placeholder` image while a specified `image` loads, then cross-fades to the loaded image. + +If `image` is changed, it will cross-fade to the new image once it is finished loading. Setting `image` to `null` will cross-fade back to the placeholder. + +![example image](https://gskinner.github.io/image_fade/example.gif) + +You can set `color` (background color), `fadeDuration` and `fadeCurve`, as well as most `Image` properties: +`width`, `height`, `fit`, `alignment`, `repeat`, `matchTextDirection`, `excludeFromSemantics` +and `semanticLabel`. + +You can also specify a `loadingBuilder` that will display load progress any time a new image is loaded. + +## Example + +See the example directory for a simple example. diff --git a/example/.gitignore b/example/.gitignore new file mode 100644 index 0000000..07488ba --- /dev/null +++ b/example/.gitignore @@ -0,0 +1,70 @@ +# Miscellaneous +*.class +*.log +*.pyc +*.swp +.DS_Store +.atom/ +.buildlog/ +.history +.svn/ + +# IntelliJ related +*.iml +*.ipr +*.iws +.idea/ + +# Visual Studio Code related +.vscode/ + +# Flutter/Dart/Pub related +**/doc/api/ +.dart_tool/ +.flutter-plugins +.packages +.pub-cache/ +.pub/ +/build/ + +# Android related +**/android/**/gradle-wrapper.jar +**/android/.gradle +**/android/captures/ +**/android/gradlew +**/android/gradlew.bat +**/android/local.properties +**/android/**/GeneratedPluginRegistrant.java + +# iOS/XCode related +**/ios/**/*.mode1v3 +**/ios/**/*.mode2v3 +**/ios/**/*.moved-aside +**/ios/**/*.pbxuser +**/ios/**/*.perspectivev3 +**/ios/**/*sync/ +**/ios/**/.sconsign.dblite +**/ios/**/.tags* +**/ios/**/.vagrant/ +**/ios/**/DerivedData/ +**/ios/**/Icon? +**/ios/**/Pods/ +**/ios/**/.symlinks/ +**/ios/**/profile +**/ios/**/xcuserdata +**/ios/.generated/ +**/ios/Flutter/App.framework +**/ios/Flutter/Flutter.framework +**/ios/Flutter/Generated.xcconfig +**/ios/Flutter/app.flx +**/ios/Flutter/app.zip +**/ios/Flutter/flutter_assets/ +**/ios/ServiceDefinitions.json +**/ios/Runner/GeneratedPluginRegistrant.* + +# Exceptions to above rules. +!**/ios/**/default.mode1v3 +!**/ios/**/default.mode2v3 +!**/ios/**/default.pbxuser +!**/ios/**/default.perspectivev3 +!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages diff --git a/example/.metadata b/example/.metadata new file mode 100644 index 0000000..033ad2a --- /dev/null +++ b/example/.metadata @@ -0,0 +1,10 @@ +# This file tracks properties of this Flutter project. +# Used by Flutter tool to assess capabilities and perform upgrades etc. +# +# This file should be version controlled and should not be manually edited. + +version: + revision: 7a4c33425ddd78c54aba07d86f3f9a4a0051769b + channel: stable + +project_type: app diff --git a/example/README.md b/example/README.md new file mode 100644 index 0000000..2022c67 --- /dev/null +++ b/example/README.md @@ -0,0 +1,7 @@ +# image_fade_example + +Demonstrates the core features of the `ImageFade` widget. + +Pressing the `(>)` button sets the `image` property to a new `NetworkImage` (loading from WikiMedia Commons). + +Pressing the `(x)` button sets `image` to `null`. diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle new file mode 100644 index 0000000..ad7f644 --- /dev/null +++ b/example/android/app/build.gradle @@ -0,0 +1,61 @@ +def localProperties = new Properties() +def localPropertiesFile = rootProject.file('local.properties') +if (localPropertiesFile.exists()) { + localPropertiesFile.withReader('UTF-8') { reader -> + localProperties.load(reader) + } +} + +def flutterRoot = localProperties.getProperty('flutter.sdk') +if (flutterRoot == null) { + throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.") +} + +def flutterVersionCode = localProperties.getProperty('flutter.versionCode') +if (flutterVersionCode == null) { + flutterVersionCode = '1' +} + +def flutterVersionName = localProperties.getProperty('flutter.versionName') +if (flutterVersionName == null) { + flutterVersionName = '1.0' +} + +apply plugin: 'com.android.application' +apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle" + +android { + compileSdkVersion 28 + + lintOptions { + disable 'InvalidPackage' + } + + defaultConfig { + // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html). + applicationId "com.example.image_fade_example" + minSdkVersion 16 + targetSdkVersion 28 + versionCode flutterVersionCode.toInteger() + versionName flutterVersionName + testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" + } + + buildTypes { + release { + // TODO: Add your own signing config for the release build. + // Signing with the debug keys for now, so `flutter run --release` works. + signingConfig signingConfigs.debug + } + } +} + +flutter { + source '../..' +} + +dependencies { + testImplementation 'junit:junit:4.12' + androidTestImplementation 'com.android.support.test:runner:1.0.2' + androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' +} diff --git a/example/android/app/src/debug/AndroidManifest.xml b/example/android/app/src/debug/AndroidManifest.xml new file mode 100644 index 0000000..50f0683 --- /dev/null +++ b/example/android/app/src/debug/AndroidManifest.xml @@ -0,0 +1,7 @@ + + + + diff --git a/example/android/app/src/main/AndroidManifest.xml b/example/android/app/src/main/AndroidManifest.xml new file mode 100644 index 0000000..aa393cd --- /dev/null +++ b/example/android/app/src/main/AndroidManifest.xml @@ -0,0 +1,33 @@ + + + + + + + + + + + + + + diff --git a/example/android/app/src/main/java/com/example/image_fade_example/MainActivity.java b/example/android/app/src/main/java/com/example/image_fade_example/MainActivity.java new file mode 100644 index 0000000..dfbe0c1 --- /dev/null +++ b/example/android/app/src/main/java/com/example/image_fade_example/MainActivity.java @@ -0,0 +1,13 @@ +package com.example.image_fade_example; + +import android.os.Bundle; +import io.flutter.app.FlutterActivity; +import io.flutter.plugins.GeneratedPluginRegistrant; + +public class MainActivity extends FlutterActivity { + @Override + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + GeneratedPluginRegistrant.registerWith(this); + } +} diff --git a/example/android/app/src/main/res/drawable/launch_background.xml b/example/android/app/src/main/res/drawable/launch_background.xml new file mode 100644 index 0000000..304732f --- /dev/null +++ b/example/android/app/src/main/res/drawable/launch_background.xml @@ -0,0 +1,12 @@ + + + + + + + + diff --git a/example/android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/example/android/app/src/main/res/mipmap-hdpi/ic_launcher.png new file mode 100644 index 0000000..db77bb4 Binary files /dev/null and b/example/android/app/src/main/res/mipmap-hdpi/ic_launcher.png differ diff --git a/example/android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/example/android/app/src/main/res/mipmap-mdpi/ic_launcher.png new file mode 100644 index 0000000..17987b7 Binary files /dev/null and b/example/android/app/src/main/res/mipmap-mdpi/ic_launcher.png differ diff --git a/example/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/example/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png new file mode 100644 index 0000000..09d4391 Binary files /dev/null and b/example/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ diff --git a/example/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/example/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png new file mode 100644 index 0000000..d5f1c8d Binary files /dev/null and b/example/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ diff --git a/example/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/example/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png new file mode 100644 index 0000000..4d6372e Binary files /dev/null and b/example/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ diff --git a/example/android/app/src/main/res/values/styles.xml b/example/android/app/src/main/res/values/styles.xml new file mode 100644 index 0000000..00fa441 --- /dev/null +++ b/example/android/app/src/main/res/values/styles.xml @@ -0,0 +1,8 @@ + + + + diff --git a/example/android/app/src/profile/AndroidManifest.xml b/example/android/app/src/profile/AndroidManifest.xml new file mode 100644 index 0000000..50f0683 --- /dev/null +++ b/example/android/app/src/profile/AndroidManifest.xml @@ -0,0 +1,7 @@ + + + + diff --git a/example/android/build.gradle b/example/android/build.gradle new file mode 100644 index 0000000..bb8a303 --- /dev/null +++ b/example/android/build.gradle @@ -0,0 +1,29 @@ +buildscript { + repositories { + google() + jcenter() + } + + dependencies { + classpath 'com.android.tools.build:gradle:3.2.1' + } +} + +allprojects { + repositories { + google() + jcenter() + } +} + +rootProject.buildDir = '../build' +subprojects { + project.buildDir = "${rootProject.buildDir}/${project.name}" +} +subprojects { + project.evaluationDependsOn(':app') +} + +task clean(type: Delete) { + delete rootProject.buildDir +} diff --git a/example/android/gradle.properties b/example/android/gradle.properties new file mode 100644 index 0000000..8bd86f6 --- /dev/null +++ b/example/android/gradle.properties @@ -0,0 +1 @@ +org.gradle.jvmargs=-Xmx1536M diff --git a/example/android/gradle/wrapper/gradle-wrapper.properties b/example/android/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..2819f02 --- /dev/null +++ b/example/android/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,6 @@ +#Fri Jun 23 08:50:38 CEST 2017 +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip diff --git a/example/android/settings.gradle b/example/android/settings.gradle new file mode 100644 index 0000000..5a2f14f --- /dev/null +++ b/example/android/settings.gradle @@ -0,0 +1,15 @@ +include ':app' + +def flutterProjectRoot = rootProject.projectDir.parentFile.toPath() + +def plugins = new Properties() +def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins') +if (pluginsFile.exists()) { + pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) } +} + +plugins.each { name, path -> + def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile() + include ":$name" + project(":$name").projectDir = pluginDirectory +} diff 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"filename" : "Icon-App-76x76@2x.png", + "scale" : "2x" + }, + { + "size" : "83.5x83.5", + "idiom" : "ipad", + "filename" : "Icon-App-83.5x83.5@2x.png", + "scale" : "2x" + }, + { + "size" : "1024x1024", + "idiom" : "ios-marketing", + "filename" : "Icon-App-1024x1024@1x.png", + "scale" : "1x" + } + ], + "info" : { + "version" : 1, + "author" : "xcode" + } +} diff --git a/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png b/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png new file mode 100644 index 0000000..3d43d11 Binary files /dev/null and b/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png differ diff --git a/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png b/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png new file mode 100644 index 0000000..28c6bf0 Binary files /dev/null and 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+ } + ], + "info" : { + "version" : 1, + "author" : "xcode" + } +} diff --git a/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png b/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png new file mode 100644 index 0000000..9da19ea Binary files /dev/null and b/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png differ diff --git a/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png b/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png new file mode 100644 index 0000000..9da19ea Binary files /dev/null and b/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png differ diff --git a/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png b/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png new file mode 100644 index 0000000..9da19ea Binary files /dev/null and b/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png differ diff --git a/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md b/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md new file mode 100644 index 0000000..89c2725 --- /dev/null +++ b/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md @@ -0,0 +1,5 @@ +# Launch Screen Assets + +You can customize the launch screen with your own desired assets by replacing the image files in this directory. + +You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images. \ No newline at end of file diff --git a/example/ios/Runner/Base.lproj/LaunchScreen.storyboard b/example/ios/Runner/Base.lproj/LaunchScreen.storyboard new file mode 100644 index 0000000..f2e259c --- /dev/null +++ b/example/ios/Runner/Base.lproj/LaunchScreen.storyboard @@ -0,0 +1,37 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/example/ios/Runner/Base.lproj/Main.storyboard b/example/ios/Runner/Base.lproj/Main.storyboard new file mode 100644 index 0000000..f3c2851 --- /dev/null +++ b/example/ios/Runner/Base.lproj/Main.storyboard @@ -0,0 +1,26 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/example/ios/Runner/Info.plist b/example/ios/Runner/Info.plist new file mode 100644 index 0000000..ba695ac --- /dev/null +++ b/example/ios/Runner/Info.plist @@ -0,0 +1,45 @@ + + + + + CFBundleDevelopmentRegion + en + CFBundleExecutable + $(EXECUTABLE_NAME) + CFBundleIdentifier + $(PRODUCT_BUNDLE_IDENTIFIER) + CFBundleInfoDictionaryVersion + 6.0 + CFBundleName + image_fade_example + CFBundlePackageType + APPL + CFBundleShortVersionString + $(FLUTTER_BUILD_NAME) + CFBundleSignature + ???? + CFBundleVersion + $(FLUTTER_BUILD_NUMBER) + LSRequiresIPhoneOS + + UILaunchStoryboardName + LaunchScreen + UIMainStoryboardFile + Main + UISupportedInterfaceOrientations + + UIInterfaceOrientationPortrait + UIInterfaceOrientationLandscapeLeft + UIInterfaceOrientationLandscapeRight + + UISupportedInterfaceOrientations~ipad + + UIInterfaceOrientationPortrait + UIInterfaceOrientationPortraitUpsideDown + UIInterfaceOrientationLandscapeLeft + UIInterfaceOrientationLandscapeRight + + UIViewControllerBasedStatusBarAppearance + + + diff --git a/example/ios/Runner/main.m b/example/ios/Runner/main.m new file mode 100644 index 0000000..dff6597 --- /dev/null +++ b/example/ios/Runner/main.m @@ -0,0 +1,9 @@ +#import +#import +#import "AppDelegate.h" + +int main(int argc, char* argv[]) { + @autoreleasepool { + return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); + } +} diff --git a/example/lib/main.dart b/example/lib/main.dart new file mode 100644 index 0000000..4e29897 --- /dev/null +++ b/example/lib/main.dart @@ -0,0 +1,96 @@ +import 'package:flutter/material.dart'; +import 'package:image_fade/image_fade.dart'; + +void main() => runApp(MyApp()); + +class MyApp extends StatelessWidget { + @override + Widget build(BuildContext context) { + return MaterialApp( + title: 'Flutter Demo', + theme: ThemeData( + primarySwatch: Colors.yellow, + ), + home: MyHomePage(title: 'Flutter Demo Home Page'), + ); + } +} + +class MyHomePage extends StatefulWidget { + MyHomePage({Key key, this.title}) : super(key: key); + + final String title; + + @override + _MyHomePageState createState() => _MyHomePageState(); +} + +class _MyHomePageState extends State { + // Sample images from Wikimedia Commons: + static const List _imgs = [ + 'https://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Almeida_Júnior_-_Saudade_%28Longing%29_-_Google_Art_Project.jpg/513px-Almeida_Júnior_-_Saudade_%28Longing%29_-_Google_Art_Project.jpg', + 'https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Rafael_-_Retrato_de_um_Cardeal.jpg/786px-Rafael_-_Retrato_de_um_Cardeal.jpg', + 'https://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/James_McNeill_Whistler_-_La_Princesse_du_pays_de_la_porcelaine_-_brighter.jpg/580px-James_McNeill_Whistler_-_La_Princesse_du_pays_de_la_porcelaine_-_brighter.jpg', + 'https://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Hans_Holbein_der_Jüngere_-_Der_Kaufmann_Georg_Gisze_-_Google_Art_Project.jpg/897px-Hans_Holbein_der_Jüngere_-_Der_Kaufmann_Georg_Gisze_-_Google_Art_Project.jpg', + 'https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Pieter_Bruegel_the_Elder_-_The_Tower_of_Babel_%28Vienna%29_-_Google_Art_Project_-_edited.jpg/1280px-Pieter_Bruegel_the_Elder_-_The_Tower_of_Babel_%28Vienna%29_-_Google_Art_Project_-_edited.jpg', + ]; + + int _counter = 0; + bool _clear = true; + + void _incrementCounter() { + setState(() { + if (_clear) { _clear = false; } + else { _counter = (_counter+1)%_imgs.length; } + }); + } + + void _clearImage() { + setState(() { + _clear = true; + }); + } + + @override + Widget build(BuildContext context) { + return Scaffold( + appBar: AppBar( + title: Text('Showing ' + (_clear ? 'placeholder image' : "image #$_counter from Wikimedia")), + ), + + body: Stack(children: [ + Positioned.fill(child: + ImageFade( + image: _clear ? null : NetworkImage(_imgs[_counter]), + placeholder: AssetImage('assets/images/placeholder.png'), + backgroundColor: Colors.black, + alignment: Alignment.center, + fit: BoxFit.cover, + loadingBuilder: (BuildContext context, Widget child, ImageChunkEvent event) { + if (event == null) { return child; } + return Center( + child: CircularProgressIndicator( + value: event.expectedTotalBytes == null ? 0.0 : event.cumulativeBytesLoaded / event.expectedTotalBytes + ), + ); + }, + ) + ) + ]), + + floatingActionButton: Row(mainAxisAlignment: MainAxisAlignment.end, children: [ + FloatingActionButton( + onPressed: _incrementCounter, + tooltip: 'Next', + child: Icon(Icons.navigate_next), + ), + SizedBox(width:10.0), + FloatingActionButton( + onPressed: _clearImage, + tooltip: 'Clear', + child: Icon(Icons.clear), + ), + ]), + ); + } +} diff --git a/example/pubspec.lock b/example/pubspec.lock new file mode 100644 index 0000000..f7a58b1 --- /dev/null +++ b/example/pubspec.lock @@ -0,0 +1,146 @@ +# Generated by pub +# See https://dart.dev/tools/pub/glossary#lockfile +packages: + async: + dependency: transitive + description: + name: async + url: "https://pub.dartlang.org" + source: hosted + version: "2.2.0" + boolean_selector: + dependency: transitive + description: + name: boolean_selector + url: "https://pub.dartlang.org" + source: hosted + version: "1.0.4" + charcode: + dependency: transitive + description: + name: charcode + url: "https://pub.dartlang.org" + source: hosted + version: "1.1.2" + collection: + dependency: transitive + description: + name: collection + url: "https://pub.dartlang.org" + source: hosted + version: "1.14.11" + flutter: + dependency: "direct main" + description: flutter + source: sdk + version: "0.0.0" + flutter_test: + dependency: "direct dev" + description: flutter + source: sdk + version: "0.0.0" + image_fade: + dependency: "direct main" + description: + path: ".." + relative: true + source: path + version: "0.1.0" + matcher: + dependency: transitive + description: + name: matcher + url: "https://pub.dartlang.org" + source: hosted + version: "0.12.5" + meta: + dependency: transitive + description: + name: meta + url: "https://pub.dartlang.org" + source: hosted + version: "1.1.6" + path: + dependency: transitive + description: + name: path + url: "https://pub.dartlang.org" + source: hosted + version: "1.6.2" + pedantic: + dependency: transitive + description: + name: pedantic + url: "https://pub.dartlang.org" + source: hosted + version: "1.7.0" + quiver: + dependency: transitive + description: + name: quiver + url: "https://pub.dartlang.org" + source: hosted + version: "2.0.3" + sky_engine: + dependency: transitive + description: flutter + source: sdk + version: "0.0.99" + source_span: + dependency: transitive + description: + name: source_span + url: "https://pub.dartlang.org" + source: hosted + version: "1.5.5" + stack_trace: + dependency: transitive + description: + name: stack_trace + url: "https://pub.dartlang.org" + source: hosted + version: "1.9.3" + stream_channel: + dependency: transitive + description: + name: stream_channel + url: "https://pub.dartlang.org" + source: hosted + version: "2.0.0" + string_scanner: + dependency: transitive + description: + name: string_scanner + url: "https://pub.dartlang.org" + source: hosted + version: "1.0.4" + term_glyph: + dependency: transitive + description: + name: term_glyph + url: "https://pub.dartlang.org" + source: hosted + version: "1.1.0" + test_api: + dependency: transitive + description: + name: test_api + url: "https://pub.dartlang.org" + source: hosted + version: "0.2.5" + typed_data: + dependency: transitive + description: + name: typed_data + url: "https://pub.dartlang.org" + source: hosted + version: "1.1.6" + vector_math: + dependency: transitive + description: + name: vector_math + url: "https://pub.dartlang.org" + source: hosted + version: "2.0.8" +sdks: + dart: ">=2.2.2 <3.0.0" diff --git a/example/pubspec.yaml b/example/pubspec.yaml new file mode 100644 index 0000000..3efe314 --- /dev/null +++ b/example/pubspec.yaml @@ -0,0 +1,27 @@ +name: image_fade_example +description: Load and cross fade images +author: Grant Skinner +repository: TODO! + +version: 1.0.0+1 + +environment: + sdk: ">=2.1.0 <3.0.0" + +dependencies: + flutter: + sdk: flutter + image_fade: + path: ../ + +dev_dependencies: + flutter_test: + sdk: flutter + + +# The following section is specific to Flutter. +flutter: + uses-material-design: true + + assets: + - ./assets/images/ diff --git a/lib/image_fade.dart b/lib/image_fade.dart new file mode 100644 index 0000000..6be5dff --- /dev/null +++ b/lib/image_fade.dart @@ -0,0 +1,254 @@ +library image_fade; + +import 'package:flutter/material.dart'; + +/// A widget that displays a [placeholder] image while a specified [image] loads, +/// then cross-fades to the loaded image. +/// +/// If [image] is changed, it will cross-fade to the new image once it finishes +/// loading. +/// +/// Setting [image] to null will cross-fade back to the [placeholder]. +/// +/// ```dart +/// ImageFade( +/// placeholder: AssetImage('assets/myPlaceholder.png'), +/// image: NetworkImage('https://backend.example.com/image.png'), +/// ) +/// ``` + +class ImageFade extends StatefulWidget { + /// Creates a widget that displays a [placeholder] image while a specified [image] loads, + /// then cross-fades to the loaded image. + /// + /// The [placeholder] argument must not be null. + const ImageFade({ + Key key, + @required this.placeholder, + this.image, + this.backgroundColor = Colors.transparent, + this.fadeCurve = Curves.linear, + this.fadeDuration = const Duration(milliseconds: 500), + + this.width, + this.height, + this.fit = BoxFit.scaleDown, + this.alignment = Alignment.center, + this.repeat = ImageRepeat.noRepeat, + + this.matchTextDirection = false, + this.excludeFromSemantics = false, + this.semanticLabel, + + this.loadingBuilder, + }) : + assert(placeholder != null), + super(key: key); + + /// Image displayed when [image] is null or is loading initially. + final ImageProvider placeholder; + + /// The image to display displayed. + final ImageProvider image; + + /// The color that will display behind / around images. + final Color backgroundColor; + + /// The curve of the fade-in animation. + final Curve fadeCurve; + + /// The duration of the fade-in animation. + final Duration fadeDuration; + + /// The width to display at. See [Image.width] for more information. + final double width; + + /// The height to display at. See [Image.height] for more information. + final double height; + + /// How to draw the image within its bounds. Defaults to [BoxFit.scaleDown]. See [Image.fit] for more information. + final BoxFit fit; + + /// How to align the image within its bounds. See [Image.alignment] for more information. + final Alignment alignment; + + /// How to paint any portions of the layout bounds not covered by the image. See [Image.repeat] for more information. + final ImageRepeat repeat; + + /// Whether to paint the image in the direction of the [TextDirection]. See [Image.matchTextDirection] for more information. + final bool matchTextDirection; + + /// Whether to exclude this image from semantics. See [Image.excludeFromSemantics] for more information. + final bool excludeFromSemantics; + + /// A Semantic description of the image. See [Image.semanticLabel] for more information. + final String semanticLabel; + + /// A builder that specifies the widget to display while an image is loading. See [Image.loadingBuilder] for more information. + final ImageLoadingBuilder loadingBuilder; + + @override + State createState() => _ImageFadeState(); +} + +class _ImageResolver { + ImageStream _stream; + Function(ImageInfo) callback; + Function(ImageChunkEvent) progressCallback; + ImageStreamListener _listener; + + ImageChunkEvent chunkEvent; + + _ImageResolver(ImageProvider provider, _ImageFadeState state, this.callback, [this.progressCallback]) { + double w = state.widget.width, h = state.widget.height; + ImageConfiguration config = createLocalImageConfiguration( + state.context, + size: w != null && h != null ? Size(w, h) : null, + ); + _listener = ImageStreamListener(_complete, onChunk: _progress); + _stream = provider.resolve(config, ); + _stream.addListener(_listener); // Called sync if already completed. + } + + void _complete(ImageInfo imageInfo, bool) { + callback(imageInfo); + } + + void _progress(ImageChunkEvent event) { + if (progressCallback != null) { progressCallback(event); } + } + + void dispose() { + _stream.removeListener(_listener); + } +} + +class _ImageFadeState extends State with TickerProviderStateMixin { + ImageInfo _backImageInfo; + ImageInfo _frontImageInfo; + _ImageResolver _backResolver; + _ImageResolver _frontResolver; + AnimationController _controller; + Animation _animation; + ImageChunkEvent _chunkEvent; + + @override + void initState() { + _controller = AnimationController(vsync: this, value: 1.0); + _controller.addListener((){ setState(() {}); }); + super.initState(); + } + + @override + void didChangeDependencies() { + super.didChangeDependencies(); + _update(context); // Can't call this in initState because createLocalImageConfiguration throws errors. + } + + @override + void didUpdateWidget(ImageFade old) { + // not called on init + super.didUpdateWidget(old); + _update(context, old); + } + + void _update(BuildContext context, [ImageFade old]) { + final ImageProvider placeholder = widget.placeholder; + final ImageProvider image = widget.image ?? placeholder; + final ImageProvider oldPlaceholder = old?.placeholder; + final ImageProvider oldImage = old?.image ?? oldPlaceholder; + + if (_frontResolver == null && image != null && placeholder != null) { + // Initing, need to start with the placeholder in the back: + _backResolver = _ImageResolver(placeholder, this, (o) => _onImageComplete(o, true)); + } + + if (image != oldImage) { + if (_frontResolver != null) { + _backResolver?.dispose(); + _backResolver = _frontResolver; + _backImageInfo = _frontImageInfo; + _frontImageInfo = null; + } + + _frontResolver = _ImageResolver(image, this, _onImageComplete, _onImageProgress); + } + } + + RawImage _getImage(ImageInfo imageInfo, {opacity:1.0}) { + return RawImage( + image: imageInfo?.image, + color: Color.fromRGBO(255, 255, 255, opacity), + colorBlendMode: BlendMode.modulate, + + width: widget.width, + height: widget.height, + fit: widget.fit, + alignment: widget.alignment, + repeat: widget.repeat, + matchTextDirection: widget.matchTextDirection, + ); + } + + void _onImageComplete(ImageInfo imageInfo, [back=false]) { + setState((){ + if (back) { + _backImageInfo = imageInfo; + } else { + _frontImageInfo = imageInfo; + _controller.duration = widget.fadeDuration; + _animation = CurvedAnimation( + parent: _controller, + curve: widget.fadeCurve + ); + _controller.forward(from: 0.0); + _chunkEvent = null; + } + }); + } + + void _onImageProgress(ImageChunkEvent event) { + setState(() { + _chunkEvent = event; + }); + } + + @override + Widget build(BuildContext context) { + List kids = []; + bool frontIsOpaque = _frontImageInfo != null && _animation.value == 1.0; + if (_backImageInfo != null && !frontIsOpaque) { kids.add(_getImage(_backImageInfo)); } + + Widget front = _getImage(_frontImageInfo, opacity: _animation?.value ?? 1.0); + if (widget.loadingBuilder != null) { + front = widget.loadingBuilder(context, front, _chunkEvent); + } + + kids.add(front); + Widget content = Container( + color: widget.backgroundColor, + width: widget.width, + height: widget.height, + child: Stack(children: kids, fit: StackFit.passthrough,) + ); + + if (widget.excludeFromSemantics) { + return content; + } + + String label = widget.semanticLabel; + return Semantics( + container: label != null, + image: true, + label: label ?? "", + child: content, + ); + } + + @override + void dispose() { + _backResolver?.dispose(); + _frontResolver?.dispose(); + super.dispose(); + } +} \ No newline at end of file diff --git a/pubspec.lock b/pubspec.lock new file mode 100644 index 0000000..7642229 --- /dev/null +++ b/pubspec.lock @@ -0,0 +1,139 @@ +# Generated by pub +# See https://dart.dev/tools/pub/glossary#lockfile +packages: + async: + dependency: transitive + description: + name: async + url: "https://pub.dartlang.org" + source: hosted + version: "2.2.0" + boolean_selector: + dependency: transitive + description: + name: boolean_selector + url: "https://pub.dartlang.org" + source: hosted + version: "1.0.4" + charcode: + dependency: transitive + description: + name: charcode + url: "https://pub.dartlang.org" + source: hosted + version: "1.1.2" + collection: + dependency: transitive + description: + name: collection + url: "https://pub.dartlang.org" + source: hosted + version: "1.14.11" + flutter: + dependency: "direct main" + description: flutter + source: sdk + version: "0.0.0" + flutter_test: + dependency: "direct dev" + description: flutter + source: sdk + version: "0.0.0" + matcher: + dependency: transitive + description: + name: matcher + url: "https://pub.dartlang.org" + source: hosted + version: "0.12.5" + meta: + dependency: transitive + description: + name: meta + url: "https://pub.dartlang.org" + source: hosted + version: "1.1.6" + path: + dependency: transitive + description: + name: path + url: "https://pub.dartlang.org" + source: hosted + version: "1.6.2" + pedantic: + dependency: transitive + description: + name: pedantic + url: "https://pub.dartlang.org" + source: hosted + version: "1.7.0" + quiver: + dependency: transitive + description: + name: quiver + url: "https://pub.dartlang.org" + source: hosted + version: "2.0.3" + sky_engine: + dependency: transitive + description: flutter + source: sdk + version: "0.0.99" + source_span: + dependency: transitive + description: + name: source_span + url: "https://pub.dartlang.org" + source: hosted + version: "1.5.5" + stack_trace: + dependency: transitive + description: + name: stack_trace + url: "https://pub.dartlang.org" + source: hosted + version: "1.9.3" + stream_channel: + dependency: transitive + description: + name: stream_channel + url: "https://pub.dartlang.org" + source: hosted + version: "2.0.0" + string_scanner: + dependency: transitive + description: + name: string_scanner + url: "https://pub.dartlang.org" + source: hosted + version: "1.0.4" + term_glyph: + dependency: transitive + description: + name: term_glyph + url: "https://pub.dartlang.org" + source: hosted + version: "1.1.0" + test_api: + dependency: transitive + description: + name: test_api + url: "https://pub.dartlang.org" + source: hosted + version: "0.2.5" + typed_data: + dependency: transitive + description: + name: typed_data + url: "https://pub.dartlang.org" + source: hosted + version: "1.1.6" + vector_math: + dependency: transitive + description: + name: vector_math + url: "https://pub.dartlang.org" + source: hosted + version: "2.0.8" +sdks: + dart: ">=2.2.2 <3.0.0" diff --git a/pubspec.yaml b/pubspec.yaml new file mode 100644 index 0000000..dee7556 --- /dev/null +++ b/pubspec.yaml @@ -0,0 +1,23 @@ +name: image_fade +description: A widget that displays a placeholder and optional progress indicator while an image loads, then cross-fades to the loaded image. Improves on FadeInImage. +author: Grant Skinner +repository: https://github.com/gskinner/image_fade +homepage: https://github.com/gskinner/image_fade + +version: 0.1.0 + +environment: + sdk: ">=2.1.0 <3.0.0" + +dependencies: + flutter: + sdk: flutter + +dev_dependencies: + flutter_test: + sdk: flutter + + +# The following section is specific to Flutter. +flutter: + uses-material-design: true diff --git a/test/image_fade_test.dart b/test/image_fade_test.dart new file mode 100644 index 0000000..5130502 --- /dev/null +++ b/test/image_fade_test.dart @@ -0,0 +1,6 @@ +import 'package:flutter_test/flutter_test.dart'; + +void main() { + test('test name', () { + }); +}