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README.md

@@ -1,14 +1,42 @@
 # JSON to SVG
 
-Generate SVG from JSON
+Generates SVG from JSON
 
+Installation: 'npm i json-to-svg'
 
 ```javascript
 
+import svgen from 'json-to-svg';
+
 import * as d3 from "d3";
 
-const { svgen } = require('json-to-svg')
+console.log( 
+
+    svgen(d3,{"target":"histogram","color":"blue","barwidth":20,"intergap":5,"dataset":[25,67,45,19,89],"size":2,"animate":false}) 
+
+)
+
+```
+
+## HTTP server
+
+```javascript
+
+import svgen from 'json-to-svg'
+
+import * as d3 from "d3";
+
+import { webpage, getHtml } from 'htwrite'
+
+import http from 'http'
+
+let xml = svgen(d3,{"target":"histogram","color":"blue","barwidth":20,"intergap":5,"dataset":[25,67,45,19,89],"size":2,"animate":false}) 
+
+http.createServer(function (req, res) {
+    res.write(webpage("demo",'',xml));
+    res.end();
+  }).listen(8080);
 
-console.log( svgen(d3,{"target":"histogram","color":"blue","barwidth":20,"intergap":5,"dataset":[25,67,45,19,89],"size":2,"animate":true}) )
+console.log(`server started at http://localhost:8080`)
 
 ```

index.js

@@ -85,25 +85,97 @@ const svgen = (d3,jsondata={})=>{
     }
     else if( jsondata?.target === 'histogram'){
 
+        let size = ( jsondata.hasOwnProperty('size') ) ? parseFloat(jsondata.size) : 1;
+
         const dmax = d3.max(jsondata?.dataset);
 
+        let animate = ( jsondata.hasOwnProperty('animate') ) ? jsondata.animate : false;
+
+        if(animate){
+
+            function enterAnim(enter){
+
+                enter.append('rect')
+                    .attr('x', (d, i) => i * (jsondata?.intergap+jsondata?.barwidth) * size)
+                    .attr('width', jsondata?.barwidth*size)
+                    .attr("y", d =>(dmax - d)*size)
+                    .attr("height", d => d*size)
+                    .attr("class", 'bar')
+
+
+                .call( rect => 
+                    rect.append('animate')
+                    .attr('attributeName', "height")
+                    .attr('values', (d)=> `0;1;${ d*size }` )
+                    .attr('keyTimes', (d,i)=> `0;${Math.trunc(1000*(1-(1/(3*i+3))))/1000};1` ) // ="0; 0.25; 0.5; 0.75; 1"
+                    .attr('dur', (d,i)=>`${i*2+2}s`)  
+                    .attr('repeatcount', 1)
+
+                )
+
+                .call( rect => 
+                    rect.append('animate')
+                    .attr('attributeName', "y")
+                    .attr('values', (d)=> `${dmax*size};${dmax*size};${ (dmax - d)*size }` )
+                    .attr('keyTimes', (d,i)=> `0;${Math.trunc(1000*(1-(1/(3*i+3))))/1000};1` )
+                    .attr('dur', (d,i)=>`${i*2+2}s`)  
+                    .attr('repeatcount', 1)
+                )
+            }
+
+            svg.append('g')
+                .attr('fill', jsondata?.color)
+                .attr('transform', `translate(${200/size},${200/size})`)
+            .selectAll('rect')
+            .data(jsondata?.dataset)
+            .join(
+                enter=>enterAnim(enter)
+            )
+            /* .selectAll('animate')
+            .data([d => d], (h,i)=>{ return { "begin":i, "height":h} } )        // 
+            .join( 
+                enter=>enter.append('animate')
+                    .attr('attributeName', "height")
+                    .attr('values', (d)=> `0;${ d.height }` )   // `0;50`   function(d){ return `0;${ d }` }
+                    .attr('begin', d => `2s` ) // `${d.begin}s`   () =>{ indx++; `${ indx }s`; }
+                    .attr('dur', "1s")  
+                    .attr('repeatcount', 1)
+            ) */
+        }
+        else{
+
+            svg.append('g')
+                .attr('fill', jsondata?.color)
+                .attr('transform', `translate(${200/size},${200/size})`)
+            .selectAll('rect')
+            .data(jsondata?.dataset)
+            .join('rect')
+                .attr('x', (d, i) => i * (jsondata?.intergap+jsondata?.barwidth) * size)
+                .attr('width', jsondata?.barwidth*size)
+                .attr("y", d =>(dmax - d)*size)
+                .attr("height", d => d*size)
+        }
+
         svg.append('g')
-		.attr('fill', jsondata?.color)
-		.attr('transform', `translate(200,200)`)
-		.selectAll('rect')
-		.data(jsondata?.dataset)
-		.join('rect')
-		.attr('x', (d, i) => i * (jsondata?.intergap+jsondata?.barwidth))
-		.attr('width', jsondata?.barwidth)
-		.attr("y", d =>(dmax - d))
-		.attr("height", d => d)
+            .attr('fill', jsondata?.color)
+            .attr('transform', `translate(${200/size},${200/size})`)
+        .selectAll('text')
+        .data(jsondata?.dataset)
+        .join('text')
+            .attr('x', (d, i) => i * (jsondata?.intergap+jsondata?.barwidth) * size)
+            .attr("y", d =>(dmax - d)*size - 20)
+            .style("font-size", 10+size*2)
+            .style('font-family', 'sans-serif')
+            .text(d => d)
 
 
     }
+
 
     console.log(svg.node().outerHTML)
 
     return svg.node().outerHTML;
 }
 
-module.exports = { svgen }
+
+module.exports = svgen;