Original version written in D3 v3: http://bl.ocks.org/bollwyvl/871b7c781b92fd0044f5
This version is simply upgraded to D3 v4 for educational purpose.
2017.04.23 - Hanoi, Vietnam
Last active
April 23, 2018 10:32
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D3js v4 - Drag + Zoom + Slider
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| x | y | |
|---|---|---|
| 200 | 150 | |
| 180 | 139 | |
| 230 | 145 | |
| 190 | 158 | |
| 210 | 153 | |
| 240 | 169 | |
| 160 | 142 | |
| 140 | 112 | |
| 220 | 178 | |
| 170 | 118 | |
| 150 | 126 |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
| <style> | |
| .dot circle { | |
| fill: lightsteelblue; | |
| stroke: steelblue; | |
| stroke-width: 1.5px; | |
| } | |
| .dot circle.dragging { | |
| fill: red; | |
| stroke: brown; | |
| } | |
| .axis line { | |
| fill: none; | |
| stroke: #ddd; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| <title></title> | |
| </head> | |
| <body> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var margin = { top: -5, right: -5, bottom: -5, left: -5 }, | |
| width = 460 - margin.left - margin.right, | |
| height = 300 - margin.top - margin.bottom; | |
| var zoom = d3.zoom() | |
| .scaleExtent([1, 10]) | |
| .on("zoom", zoomed); | |
| console.log(zoom.scaleExtent()[0], zoom.scaleExtent()[1]); | |
| var drag = d3.drag() | |
| .subject(function (d) { return d; }) | |
| .on("start", dragstarted) | |
| .on("drag", dragged) | |
| .on("end", dragended); | |
| var slider = d3.select("body").append("p").append("input") | |
| .datum({}) | |
| .attr("type", "range") | |
| .attr("value", zoom.scaleExtent()[0]) | |
| .attr("min", zoom.scaleExtent()[0]) | |
| .attr("max", zoom.scaleExtent()[1]) | |
| .attr("step", (zoom.scaleExtent()[1] - zoom.scaleExtent()[0]) / 100) | |
| .on("input", slided); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", "translate(" + margin.left + "," + margin.right + ")") | |
| .call(zoom); | |
| var rect = svg.append("rect") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .style("fill", "none") | |
| .style("pointer-events", "all"); | |
| var container = svg.append("g"); | |
| container.append("g") | |
| .attr("class", "x axis") | |
| .selectAll("line") | |
| .data(d3.range(0, width, 10)) | |
| .enter().append("line") | |
| .attr("x1", function (d) { return d; }) | |
| .attr("y1", 0) | |
| .attr("x2", function (d) { return d; }) | |
| .attr("y2", height); | |
| container.append("g") | |
| .attr("class", "y axis") | |
| .selectAll("line") | |
| .data(d3.range(0, height, 10)) | |
| .enter().append("line") | |
| .attr("x1", 0) | |
| .attr("y1", function (d) { return d; }) | |
| .attr("x2", width) | |
| .attr("y2", function (d) { return d; }); | |
| d3.tsv("dots.tsv", dottype, function (error, dots) { | |
| dot = container.append("g") | |
| .attr("class", "dot") | |
| .selectAll("circle") | |
| .data(dots) | |
| .enter().append("circle") | |
| .attr("r", 5) | |
| .attr("cx", function (d) { return d.x; }) | |
| .attr("cy", function (d) { return d.y; }) | |
| .call(drag); | |
| }); | |
| function dottype(d) { | |
| d.x = +d.x; | |
| d.y = +d.y; | |
| return d; | |
| } | |
| function zoomed() { | |
| const currentTransform = d3.event.transform; | |
| container.attr("transform", currentTransform); | |
| slider.property("value", currentTransform.k); | |
| } | |
| function dragstarted(d) { | |
| d3.event.sourceEvent.stopPropagation(); | |
| d3.select(this).classed("dragging", true); | |
| } | |
| function dragged(d) { | |
| d3.select(this).attr("cx", d.x = d3.event.x).attr("cy", d.y = d3.event.y); | |
| } | |
| function dragended(d) { | |
| d3.select(this).classed("dragging", false); | |
| } | |
| function slided(d) { | |
| zoom.scaleTo(svg, d3.select(this).property("value")); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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