# SlideRuler [Demo](https://wusb.github.io/slide-ruler)
[](https://travis-ci.org/wusb/slide-ruler)
[](https://www.npmjs.com/package/slide-ruler)
[](https://www.npmjs.com/package/slide-ruler)
[](https://www.npmjs.com/package/slide-ruler)
###### [中文 README](README-zh_CN.md)
## Features
- Developed with native javascript, doesn't rely on any frameworks and libraries.
- Customizable colors, sizes, precision, etc.
- Supports inertia and rebound for swiping meters.
- Friendly API for easy use.
## PropTypes
| Property | Type | Default | Description |
| :------------ | :------- | :----------- | :--------------------- |
| handleValue | Function | | get the return value |
| canvasWidth | Number | screen width | ruler width |
| canvasHeight | Number | 83 | ruler height |
| heightDecimal | Number | 35 | scale marks length |
| heightDigit | Number | 18 | division marks length |
| lineWidth | Number | 2 | marks width |
| colorDecimal | String | #E4E4E4 | scale marks color |
| colorDigit | String | #E4E4E4 | division marks color |
| divide | Number | 10 | division length of px |
| precision | Number | 1 | division value |
| fontSize | Number | 20 | scale fontSize |
| fontColor | String | #666666 | scale fontColor |
| fontMarginTop | Number | 35 | font margin to the top |
| maxValue | Number | 230 | max value |
| minValue | Number | 100 | min value |
| currentValue | Number | 100 | current value |
## Getting Started
### Install
```shell
yarn add slide-ruler --dev
```
### Usage Example
- **Native JavaScript**
```html
Digital Keyboard
```
```javascript
//slide-ruler.js
import SlideRuler from 'slide-ruler';
function handleValue(value){
console.log(value); //SlideRuler return value
document.querySelector('#values').innerHTML = value;
}
new SlideRuler(
{
el: document.querySelector('#app'),
maxValue: 230,
minValue: 100,
currentValue: 180
handleValue: handleValue,
precision: 1
}
);
```
- **React**
```jsx
import React from 'react';
import SlideRuler from 'slide-ruler';
class SlideRulerPage extends React.Component {
constructor(){
super();
this.handleValue = this.handleValue.bind(this);
this._renderSlideRuler = this._renderSlideRuler.bind(this);
}
componentDidMount(){
this._renderSlideRuler();
}
handleValue(value){
console.log(value); //SlideRuler return value
}
_renderSlideRuler(){
return new SlideRuler (
{
el: this.refs.slideRuler,
maxValue: 230,
minValue: 100,
currentValue: 180
handleValue: handleValue,
precision: 1
}
);
}
render(){
return (
)
}
}
export default SlideRulerPage;
```
- **Vue**
```js
```
- **Angular**
```typescript
import { Component, ViewChild, OnInit, ViewEncapsulation} from '@angular/core';
import SlideRuler from 'slide-ruler';
@Component({
selector: 'my-app',
template: `
`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent implements OnInit{
@ViewChild('slideRuler') slideRuler;
ngOnInit(){
this._renderSlideRuler();
}
_renderSlideRuler(){
return new SlideRuler (
{
el: this.slideRuler.nativeElement,
maxValue: 230,
minValue: 100,
currentValue: 180
handleValue: handleValue,
precision: 1
}
);
}
handleValue(value) {
console.log(value); //SlideRuler return value
}
}
```
## How to Contribute
Anyone and everyone is welcome to contribute to this project. The best way to start is by checking our [open issues](https://github.com/wusb/slide-ruler/issues),[submit a new issues](https://github.com/wusb/slide-ruler/issues/new?labels=bug) or [feature request](https://github.com/wusb/slide-ruler/issues/new?labels=enhancement), participate in discussions, upvote or downvote the issues you like or dislike.
## License
[**The MIT License**](http://opensource.org/licenses/MIT).