d3.js - Convert D3 to Angular component -


i have done now. how can have angular component?? here repo https://github.com/bastiankhalil/line-chart-d3 problem in function tick() should called recursively.

<!doctype html>  <meta charset="utf-8">  <style>  .line {    fill: none;    stroke: #000;    stroke-width: 1.5px;  }  </style>  <svg width="960" height="500"></svg>  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.10.0/d3.js"></script>  <script>  var n = 40,      random = d3.randomnormal(0, .2),      data = d3.range(n).map(random);    var svg = d3.select("svg"),      margin = {top: 20, right: 20, bottom: 20, left: 40},      width = +svg.attr("width") - margin.left - margin.right,      height = +svg.attr("height") - margin.top - margin.bottom,            g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");        var x = d3.scalelinear()      .domain([0, n - 1])      .range([0, width]);  var y = d3.scalelinear()      .domain([-1, 1])      .range([height, 0]);    var line = d3.line()      .x(function(d, i) { return x(i); })      .y(function(d, i) { return y(d); });    g.append("defs").append("clippath")      .attr("id", "clip")    .append("rect")      .attr("width", width)      .attr("height", height);        g.append("g")      .attr("class", "axis axis--y")      .call(d3.axisleft(y));  g.append("g")      .attr("clip-path", "url(#clip)")    .append("path")      .datum(data)      .attr("class", "line")    .transition()      .duration(500)      .ease(d3.easelinear)      .on("start", tick);      function tick() {      data.push(random());    // redraw line.    d3.select(this)        .attr("d", line)        .attr("transform", null);    // slide left.    d3.active(this)        .attr("transform", "translate(" + x(-1) + ",0)")      .transition()        .on("start", tick);    data.shift();  }  </script>

got work, full code available here.

to code working, had different things.

package

install full d3 package , import it. reason, webpack not catch transition needs bundled

this , tick function context

for tick function work, had jump though few hoops. first, tick function has rebound in component constructor correct context:

constructor() {    this.tick = this.tick.bind(this); }

then, in update/transition phase, had capture actual component before handling on callback:

const self = this; g.append('g')   .attr('clip-path', 'url(#clip)')   .append('path')   .datum(this.data)   .attr('class', 'line')   .attr('d', this.theline)   .transition()   .duration(500)   .ease(d3.easelinear)   .on('start', function (d, i) {     self.tick(this);   });

notice how introduced self variable before callback, , use call tick function this argument, , how use actual function , not lambda/arrow function. in case, this refers current selection (i.e. path element).

finally, modified tick function accept selected/transitioned element argument , apply same trickery example provided. here again, manually capture this in self variable, use function callback,and call self.tick(this).

tick(sel: any) {   const self = this;   this.data.push(this.random());   // redraw line.   d3.select(sel)     .attr('d', this.theline)     .attr('transform', null);   // slide left.   d3.active(sel)     // .select('.line')     .attr('transform', 'translate(' + this.x(-1) + ',0)')     .transition()     .on('start', function () { self.tick(this) });   this.data.shift(); }

in hope helps :-). if unclear, let me know.


Comments

Post a Comment

Popular posts from this blog

ubuntu - PHP script to find files of certain extensions in a directory, returns populated array when run in browser, but empty array when run from terminal -

i running os ububtu 16.04. ultimate goal able run php script cron job every minute. here php script located @ /var/www/html/tests/test/index.php : <?php $directorypath = $_server['document_root']."/tests/test/data/"; echo "directorypath: $directorypath<br><br>";//check $imagefilepathsarray = glob($directorypath . "*.{png,gif}", glob_brace); echo "<br><br>imagefilepathsarray: "; print_r($imagefilepathsarray);//check ?> when open php script in browser visiting url my-ip-address/tests/test/index.php , get: directorypath: /var/www/html/tests/test/data/ imagefilepathsarray:array( [0] => /var/www/html/tests/test/data/pic.png [1] => /var/www/html/tests/test/data/pic.gif ) before writing cron job in crontab file, need check if can run anywhere using terminal . opened ubuntu terminal @ /home/ location, , executed in terminal: sudo php /var/www/html/tests/test/index.php i got following out...
Read more

php - How can i create a user dashboard -

today have questions you, want create user dashboard site, include (obviously), users data, example -email -username -and others stuff how can information, , print them in html page? if can, how can these information via php sessions? shuld use session? example, if user login, , start new session ( session_start() ), how can data print in dashboard? should use php "project"? in advice, have day , thank time!
Read more

javascript - How to detect toggling of the fullscreen-toolbar in jQuery Mobile? -

i have jquery mobile page fixed full-screen toolbar, data-tap-toggle enabled. straight under toolbar have positioned banner should slide upwards when toolbar hiding , slide downward when toolbar showing. jquery mobile toggles toolbar applying , removing ui-fixed-hidden class - sadly, can't find in documentation of toolbar widget toggle , hide or show event that. how can detect when toolbar toggled, reposition banner? .banner { position: fixed; background-color: darkseagreen; top: 46px; min-height: 48px; width: 100%; text-align: center; line-height: 48px; } <!doctype html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"> <script src="https://code.jquery.com/jquery-1....
Read more