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domview

v0.0.3

Published

A simple sketching tool for use in web browsers.

Downloads

5

Readme

DOMView

A lightweight DOM wrapper for creating object-oriented view classes!

An example for the implementation of a view class can be found in example/Slider.js. You see a live demo here.

Example

import DOMView from 'domview';

// Utilites for modifying and creating new HTMLElements
let DOMUtil = {DOMView}

class Slider extends DOMView {

  constructor(min, max, step, value) {
    
    // Create some HTMLElements
    let cursor =
        DOMUtil.create('div', { className: 'slider-cursor' } /* properties */);
    let leftBackground =
        DOMUtil.create('div', { className: 'left-background' } /* properties */);
    
    super(
        'div', /* element type */ 
        { className: 'ui-slider' }, /* properties */ 
        [leftBackground, cursor] /* children */);
 
    /**
     * Or alternatively,
     *
     * super('div');
     * this.addAttrs({ className: 'ui-slider' });
     * this.addChildren([leftBackground, cursor]);
     */
 
    this._min = min;
    this._max = max;
    this._step = step;
    this._value = value;
    
    ...
 
    this._cursor = cursor;
    this._leftBackground = leftBackground;
    ...
  }
  
  // Add more methods as you please
  
  setValue(value) {
    // Round the value to the nearest step interval
    let stepNo = Math.round((value - this._min) / this._step);
    stepNo = clamp(0, stepNo, this._totalSteps);
    this._value = this._min + stepNo * this._step;
    let pct = stepNo * 100 / this._totalSteps;

    DOMUtil.setStyle(this._cursor, 'left', pct + '%');
    DOMUtil.setStyle(this._leftBackground, 'width', pct + '%');
    return this;
  }
}       

Making changes

Make sure you have node.js (currently using v4.4.4) and npm installed

Once you have that set up, all you need to do is run

npm install

Rebuilding DOMView changes into an ES5-friendly format can be done with

npm run transpile

The sample app is built with webpack. Rebuilding the sample app can be done by running

npm run build-example