Mouse interactions on svg and canvas using the same API thanks to d3-canvas-transition module. Hovering and drag & drop are supported.
Last active
July 24, 2019 05:14
-
-
Save lsbardel/b1133566e01d6d45fa7d11523dcb3e70 to your computer and use it in GitHub Desktop.
Drag & Drop on Canvas
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: bsd-3-clause |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Drag & Drop on Canvas</title> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://giottojs.org/d3-canvas-transition/0.3.6/d3-canvas-transition.js"></script> | |
| </head> | |
| <body> | |
| <div id="paper"> | |
| <label> | |
| <input id='svg' name="type" type="radio" checked> | |
| <span>svg</span> | |
| </label> | |
| <label> | |
| <input id='canvas' name="type" type="radio"> | |
| <span>canvas</span> | |
| </label> | |
| </div> | |
| <div id="example" style="max-width: 960px"></div> | |
| <script src="./script.js"></script> | |
| </body> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| (function () { | |
| d3.select('#svg').on('click', function () { | |
| draw('svg'); | |
| }); | |
| d3.select('#canvas').on('click', function () { | |
| draw('canvas'); | |
| }); | |
| if (d3.resolution() > 1) { | |
| d3.select('#paper').append('label').html( | |
| "<input id='canvas-low' name='type' type='radio'><span>canvas low resolution</span>" | |
| ); | |
| d3.select('#canvas-low').on('click', function () { | |
| draw('canvas', 1); | |
| }); | |
| } | |
| var example = d3.select("#example"), | |
| width = d3.getSize(example.style('width')), | |
| height = Math.min(500, width), | |
| radius = 20, | |
| area = Math.PI*radius*radius, | |
| margin = 2*radius, | |
| text = ''; | |
| var shapes = ['Circle', 'Cross', 'Diamond', 'Square', 'Star', 'Triangle', 'Wye'], | |
| color = d3.scaleSequential(d3.interpolateViridis), | |
| N = 20, | |
| points = d3.range(N).map(function(i) { | |
| return { | |
| type: shapes[Math.floor(Math.random()*shapes.length)], | |
| color: color((i+1)/N), | |
| x: Math.round(Math.random() * (width - 2*margin) + margin), | |
| y: Math.round(Math.random() * (height - 2*margin) + margin) | |
| }; | |
| }); | |
| draw('svg'); | |
| function draw(type, r) { | |
| example.select('.paper').remove(); | |
| var paper = example | |
| .append(type) | |
| .classed('paper', true) | |
| .style('stroke', '#333') | |
| .attr('width', width).attr('height', height).canvasResolution(r).canvas(true); | |
| var marks = d3.symbol().type(function (d) {return d3['symbol' + d.type];}).size(function (d) {return area;}); | |
| paper.append('rect') | |
| .attr('x', 0) | |
| .attr('y', 0) | |
| .attr('width', width) | |
| .attr('height', height) | |
| .style("stroke-width", 0) | |
| .style('fill', '#333') | |
| .style('fill-opacity', 0.1) | |
| .on("mousemove.hover", mouseover); | |
| paper | |
| .selectAll("path") | |
| .data(points) | |
| .enter() | |
| .append("path") | |
| .attr("transform", translate) | |
| .attr("d", marks) | |
| .style("fill", function (d) {return d.color;}) | |
| .style("stroke-width", 0) | |
| .on("mouseenter.hover", mouseenter) | |
| .on("mouseleave.hover", end) | |
| .call(d3.drag() | |
| .on("start", dragstarted) | |
| .on("drag", dragged) | |
| .on("end", mouseenter)); | |
| var coord = paper.append('text') | |
| .text(text) | |
| .classed('coord', true) | |
| .style('font-size', '20px') | |
| .style('text-anchor', 'middle') | |
| .style('alignment-baseline', 'middle') | |
| .attr("transform", translate({x: width-100, y: 20})); | |
| function mouseover () { | |
| text = d3.event.offsetX + ', ' + d3.event.offsetY; | |
| coord.text(text); | |
| } | |
| function mouseenter () { | |
| d3.select(this).style('stroke-width', '1px').style("fill", '#fff').style('cursor', 'move'); | |
| } | |
| function dragstarted () { | |
| d3.select(this).raise().style('stroke-width', '2px'); | |
| } | |
| function dragged(d) { | |
| d.x = d3.event.x; | |
| d.y = d3.event.y; | |
| d3.select(this).attr("transform", translate(d)); | |
| } | |
| function end() { | |
| var el = d3.select(this), | |
| d = el.datum(); | |
| el.style("stroke-width", 0).style("fill", d.color).style('cursor', 'default'); | |
| } | |
| function translate (d) { | |
| return "translate(" + d.x + "," + d.y + ")"; | |
| } | |
| } | |
| }()); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Thanks for your cod. It helps me for an application.