Having trouble with the clip-path in d3.js liquid fill gauge

Question

Having trouble with the clip-path in d3.js liquid fill gauge

Attempting to integrate the d3.js liquid fill gauge into my angular2 webapp has been a challenge. The clippath functionality seems to be malfunctioning, resulting in no wave being generated at all.

https://i.stack.imgur.com/3Bmga.png instead of https://i.stack.imgur.com/ydDsB.png

Given that angular2 is written in TypeScript, I made some adjustments to address any syntax errors. Here's a snippet of the code related to the clip path:

// Code for clipping wave area
var clipArea = d3.svg.area()
.x(function(d) { return waveScaleX(d[0]); } )  
.y0(function(d) { return waveScaleY(Math.sin(Math.PI*2*config.waveOffset*-1 + Math.PI*2*(1-config.waveCount) + d[1]*2*Math.PI));} )  
.y1(function(d) { return (fillCircleRadius*2 + waveHeight); } );

var waveGroup = gaugeGroup.append("defs")
.append("clipPath")
.attr("id", "clipWave" + elementId);

var wave = waveGroup.append("path")
.datum(data)
.attr("d", clipArea)
.attr("T", 0);

// Inner circle with attached clipping wave
var fillCircleGroup = gaugeGroup.append("g")
.attr("clip-path", "url(#clipWave" + elementId + ")"); 

fillCircleGroup.append("circle")
.attr("cx", radius)
.attr("cy", radius)
.attr("r", fillCircleRadius)
.style("fill", config.waveColor);

I'm uncertain about how to resolve this issue. Could changing `return waveScaleX(d.x)` to `return waveScaleX(d[0])` have caused it to fail? Unfortunately, TypeScript does not accept the former syntax.

javascript d3.js typescript angular

Answer 1

Answer №1

To enhance the clip-path in liquidFillGauge.js, you should include location.href.

Before:

var fillCircleGroup = gaugeGroup.append("g")
    .attr("clip-path", "url(#clipWave" + elementId + ")");

After modification:

var fillCircleGroup = gaugeGroup.append("g")
    .attr("clip-path", "url(" + location.href + "#clipWave" + elementId + ")");

I have implemented the fix in my fork of the gist. https://gist.github.com/jonbgallant/e85bc5440a4372aff9452e15a4e3276c

Answer 2

To enhance the clip-path in liquidFillGauge.js, you should include location.href.

Before:

var fillCircleGroup = gaugeGroup.append("g")
    .attr("clip-path", "url(#clipWave" + elementId + ")");

After modification:

var fillCircleGroup = gaugeGroup.append("g")
    .attr("clip-path", "url(" + location.href + "#clipWave" + elementId + ")");

I have implemented the fix in my fork of the gist. https://gist.github.com/jonbgallant/e85bc5440a4372aff9452e15a4e3276c

Answer 3

Answer №2

After several attempts, I managed to successfully replicate the error you mentioned. It's important to note that simply copying and pasting the liquidFillGuage.js file into your TypeScript code is not the correct approach. This raises a couple of questions - how do we incorporate it and how can TypeScript recognize it? In the context of Angular 2, TypeScript, and SystemJS, there are typically two methods to address this issue. One option is to utilize proper modules and import/require them in your TypeScript code. The other option involves including your dependency using a <script> tag and setting it up as an ambient module for TypeScript awareness. While the former works well for 'd3', opting for the latter approach might be more suitable for 'liquidFillGuage'.

To install 'd3', follow these steps:

npm install d3
typings install d3

In your systemjs.config.js file, reference 'd3' as follows:

var map = {
  ...
  'd3':                         'node_modules/d3/d3.js'
  ...
};

var packages = {
  ...    
  'd3':                         { defaultExtension: 'js' }
  ...
};

In your index.html file, add a <script src= tag pointing to liquidFillGauge script:

 <!-- 1. Load libraries -->
 <!-- Polyfill(s) for older browsers -->
 <script src="node_modules/es6-shim/es6-shim.min.js"></script>
 ...    
 <script src="some/path/to/liquidFillGauge.js"></script>

The challenging part is making TypeScript aware of 'liquidFillGauge'. Generally, external typings files (*.d.ts) exist for most libraries. However, you may need to create one for 'liquidFillGauge' in this scenario.

Within typings/browser/ambient, create a folder named liquidFillGuage and within it, include a file named index.d.ts with the following content:

declare function loadLiquidFillGauge(i: any, j: any): any;
declare function liquidFillGaugeDefaultSettings(): any;

This informs TypeScript about the functions and their parameters related to 'liquidFillGauge'.

In browser.d.ts, reference this new d file:

/// <reference path="browser/definitions/liquidFillGuage/index.d.ts" />

Lastly, in your component file, inform TypeScript about this new ambient definition:

/// <reference path="../typings/browser/ambient/liquidFillGuage/index.d.ts" />

import { Component, ElementRef, Renderer } from '@angular/core';
import * as d3 from 'd3';  //<-- this is feasible because d3 is a valid module

 ...

 // TypeScript now recognizes this!
 var gauge1 = loadLiquidFillGauge("fillgauge1", 55);
 var config1 = liquidFillGaugeDefaultSettings(); 

 ....

Answer 4

After several attempts, I managed to successfully replicate the error you mentioned. It's important to note that simply copying and pasting the liquidFillGuage.js file into your TypeScript code is not the correct approach. This raises a couple of questions - how do we incorporate it and how can TypeScript recognize it? In the context of Angular 2, TypeScript, and SystemJS, there are typically two methods to address this issue. One option is to utilize proper modules and import/require them in your TypeScript code. The other option involves including your dependency using a <script> tag and setting it up as an ambient module for TypeScript awareness. While the former works well for 'd3', opting for the latter approach might be more suitable for 'liquidFillGuage'.

To install 'd3', follow these steps:

npm install d3
typings install d3

In your systemjs.config.js file, reference 'd3' as follows:

var map = {
  ...
  'd3':                         'node_modules/d3/d3.js'
  ...
};

var packages = {
  ...    
  'd3':                         { defaultExtension: 'js' }
  ...
};

In your index.html file, add a <script src= tag pointing to liquidFillGauge script:

 <!-- 1. Load libraries -->
 <!-- Polyfill(s) for older browsers -->
 <script src="node_modules/es6-shim/es6-shim.min.js"></script>
 ...    
 <script src="some/path/to/liquidFillGauge.js"></script>

The challenging part is making TypeScript aware of 'liquidFillGauge'. Generally, external typings files (*.d.ts) exist for most libraries. However, you may need to create one for 'liquidFillGauge' in this scenario.

Within typings/browser/ambient, create a folder named liquidFillGuage and within it, include a file named index.d.ts with the following content:

declare function loadLiquidFillGauge(i: any, j: any): any;
declare function liquidFillGaugeDefaultSettings(): any;

This informs TypeScript about the functions and their parameters related to 'liquidFillGauge'.

In browser.d.ts, reference this new d file:

/// <reference path="browser/definitions/liquidFillGuage/index.d.ts" />

Lastly, in your component file, inform TypeScript about this new ambient definition:

/// <reference path="../typings/browser/ambient/liquidFillGuage/index.d.ts" />

import { Component, ElementRef, Renderer } from '@angular/core';
import * as d3 from 'd3';  //<-- this is feasible because d3 is a valid module

 ...

 // TypeScript now recognizes this!
 var gauge1 = loadLiquidFillGauge("fillgauge1", 55);
 var config1 = liquidFillGaugeDefaultSettings(); 

 ....

Having trouble with the clip-path in d3.js liquid fill gauge

Answer №1

Answer №2

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