角度5，从图像获取颜色 [英] Angular 5, get colors from an image

问题描述

我有一个使用的Android应用程序 android.support.v7.graphics.Palette从动态图像获取颜色信息，然后自定义活动的布局以使用图像中的突变颜色.我的问题是，Angular 5有什么类似之处吗?我想将此项目的Web版本建模为尽可能接近android版本.这将意味着在选择图像后动态设置一些样式颜色.

I have an android app that uses android.support.v7.graphics.Palette to get the color info from a dynamic image and then customize the layout of the activity to use mutated colors from the image. My question is, does Angular 5 have anything similiar? I want to model the web version of this project as closely to the android version as possible. This would mean dynamically setting a few style colors after an image is selected.

更新:我一直在使用 ColorThief()寻找JavaScript.但是我不确定如何从Angular 5组件中访问它.

Update: I have been looking at ColorThief() for javascript. But I am not sure how to access it from an Angular 5 component.

谢谢 PK

推荐答案

对于任何想要这样的人，我最终都使用 node-vibrant.js . 我跑了npm install 然后将该文件添加到angular.json文件中的我的脚本数组中

For anyone looking for something like this I ended up using node-vibrant.js. I ran npm install then added the file to my scripts array in the angular.json file

"scripts": [
  "node_modules/node-vibrant/dist/vibrant.min.js"
]

然后我将tsconfig.json文件更改为以下内容:

Then I changed my tsconfig.json file to the following:

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "allowSyntheticDefaultImports": true,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "target": "es5",
    "module": "commonjs",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2017",
      "dom"
    ]
  },
  "allowJs": true
}

然后我将Vibrant和Palette导入到我的角度6.0.0组件中

I then imported Vibrant and Palette into my angular 6.0.0 component

import Vibrant from 'node-vibrant';
import { Palette } from 'node-vibrant/lib/color';

然后，仅用图像的URL调用ngOnInit()就很容易了

Then it was pretty easy to call in ngOnInit() with just an url to an image

getVibrantColor(url: string){
  // Using builder
  Vibrant.from(url).getPalette((err, palette) => {
    console.log(palette)
    this.palette = palette;
  });

}

styleContainer(): any {
  console.log('palette', this.palette);
  if (this.palette.LightVibrant) {
    return { 'background-color': this.palette.LightVibrant.getHex(), 'border-color': 
      this.palette.LightMuted.getHex(), 'color': '#000000' };
  } else {
    return { 'background-color': '#FFFFFF', 'border-color':        
       this.palette.LightMuted.getHex(), 'color': '#000000' };
  }

}

并从html文件中调用它:

And call it from the html file:

<div *ngIf="palette" class="col-lg-8 details-top-container" 
[ngStyle]="styleContainer()"></div>

最困难的部分是获取正确的import语句.

The hardest part was getting the proper import statement.

import * as Vibrant from 'node-vibrant';

将无法正常工作，如文档所述.

would not work as the documentation says it will.

希望这可以节省一些时间.

Hope this saves someone some time.

PK

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