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August 29, 2015 14:04
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Drag and drop SVG elements
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| <!DOCTYPE HTML> | |
| <meta charset='utf-8'> | |
| <style> | |
| body { | |
| background: rgb(200,200,200); | |
| } | |
| svg { | |
| margin: auto; | |
| display: block; | |
| background: white; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://szejda.pl/code/helpers.js"></script> | |
| <script> | |
| var mainw = 960, | |
| mainh = 500; | |
| d3.select('body').append('svg') | |
| .attr('width', mainw) | |
| .attr('height', mainh); | |
| d3.select('svg').selectAll('tmp') | |
| .data([1, 2, 3]).enter() | |
| .append('g') | |
| .attr('transform', 'translate(0,0)') | |
| .append('rect') | |
| .attr('width', '50px') | |
| .attr('height', '50px') | |
| .attr('x', function(d){ return d * 55; }) | |
| .attr('y', 100) | |
| .attr('fill', function(d, i){ return ['red', 'green', 'blue'][i]; }); | |
| function draggable(){ | |
| // Global draggables dict | |
| if (!('dd' in window)) { | |
| window.dd = {}; | |
| } | |
| var id = 'dd-' + h.randomString(); | |
| // "Register" the new draggable element: | |
| dd[id] = { | |
| 'on': false, | |
| 'tx': 0, | |
| 'ty': 0, | |
| 'x0': null, | |
| 'x1': null, | |
| 'y0': null, | |
| 'y1': null | |
| } | |
| var selection = this instanceof d3.selection ? this : d3.select(this); | |
| selection | |
| .on('mousedown', function(){ | |
| console.log(id); | |
| dd[id].on = true; | |
| dd[id].x0 = d3.event.clientX; | |
| dd[id].y0 = d3.event.clientY; | |
| }) | |
| .on('mouseup', function(){ dd[id].on = false; }) | |
| .on('mousemove', function() { | |
| if (dd[id].on) { | |
| if (dd[id].x1 != null) { | |
| dd[id].x0 = dd[id].x1; | |
| dd[id].y0 = dd[id].y1; | |
| } | |
| dd[id].x1 = d3.event.clientX; | |
| dd[id].y1 = d3.event.clientY; | |
| dd[id].tx = dd[id].tx + (dd[id].x1 - dd[id].x0); | |
| dd[id].ty = dd[id].ty + (dd[id].y1 - dd[id].y0); | |
| d3.select(this) | |
| .attr('transform', 'translate(' + dd[id].tx + ',' + dd[id].ty + ')'); | |
| }; | |
| }); | |
| } | |
| d3.selectAll('g').each(draggable); | |
| </script> | |
| </body> |
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