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JavaScript: Building a WebGen-logo
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <link rel="stylesheet" href="webgen_logo_style.css" /> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/topojson.v1.min.js"></script> | |
| <style> | |
| </style> | |
| <body> | |
| <script src="webgen_logo_script.js"></script> | |
| <div id='logo'></div> | |
| <script> | |
| var logo = d3.select('#logo'); | |
| webgen_logo(logo); | |
| </script> | |
| </body> |
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| function webgen_logo(container){ | |
| var width = 900, | |
| height = 250; | |
| var path = d3.geo.path(); | |
| var svg = container.append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| //.on("mouseover",animate); | |
| var info = svg.append('text') | |
| .attr('x',width/2).attr('y',height/2) | |
| .attr("id", "info") | |
| .text( 'Loading...') | |
| .transition().duration(2000).style("opacity",1); | |
| var geo_logo, webgen_logo, line_data, init = true, finished_init = false; | |
| d3.json("webgen_topo.json", showData); | |
| function showData(error, de) { | |
| geo_logo = topojson.feature(de, de.objects.geo_logo); | |
| webgen_logo = topojson.feature(de, de.objects.webgen_logo); | |
| //enrich the logo-geometry with an ID | |
| webgen_logo.features = webgen_logo.features.map(function(d,i){d.properties.id = i; return d;}) | |
| line_data = topojson.feature(de, de.objects.lines); | |
| info.remove(); | |
| var webgen_logo_elements = []; | |
| var projection = d3.geo.mercator() | |
| .center([13.735, 51.1]) | |
| .scale(190000) | |
| .translate([width / 2, height / 2]); | |
| var path = d3.geo.path() | |
| .projection(projection) | |
| .pointRadius(4); | |
| svg.selectAll(".main_lines") | |
| .data(line_data.features) | |
| .enter().append("path") | |
| .attr("class","main_lines") | |
| .attr("d", path) | |
| .on("mouseover",interact_map); | |
| svg.selectAll(".logo") | |
| .data(webgen_logo.features) | |
| .enter().append("path") | |
| .attr("class","logo") | |
| .attr("d", path) | |
| .on("mouseover",interact).on("mouseout",interact_revert); | |
| svg.selectAll(".logo_lines") | |
| .data(geo_logo.features) | |
| .enter().append("path") | |
| .attr("class","logo_lines") | |
| .attr("d", path); | |
| animate(); | |
| } | |
| function interact(a){ | |
| d3.select(this).transition().style('fill-opacity',0.4) | |
| } | |
| function interact_revert(){ | |
| d3.select(this).transition().style('fill-opacity',0.8) | |
| } | |
| function interact_map(){ | |
| d3.select(this).style("stroke-width",'4px'); | |
| } | |
| function animate(){ | |
| if(init==true){ | |
| init_animation(); | |
| init = false; | |
| } | |
| } | |
| function init_animation(){ | |
| var duration = 4000; | |
| svg.transition() | |
| .duration(2000) | |
| .transition() | |
| .duration(duration+1000) | |
| .tween("opacity", function() { | |
| var opacity = d3.interpolate(0, 1); | |
| return function(t) { | |
| interOpacity = opacity(t); | |
| svg.selectAll(".logo").attr("transform","translate(0,0) scale(1,"+interOpacity+")").style('fill-opacity',interOpacity); | |
| }; | |
| }) | |
| .transition() | |
| .duration(duration) | |
| .tween("opacity", function() { | |
| var opacity = d3.interpolate(0,1); | |
| return function(t) { | |
| interOpacity = opacity(t); | |
| svg.selectAll(".logo_lines").style('stroke-opacity',interOpacity); | |
| }; | |
| }) | |
| .transition() | |
| .duration(duration) | |
| .tween("opacity", function() { | |
| var opacity = d3.interpolate(1, 0); | |
| return function(t) { | |
| interOpacity = opacity(t); | |
| svg.selectAll(".logo").style('fill-opacity',interOpacity); | |
| }; | |
| }) | |
| .transition() | |
| .duration(duration) | |
| .tween("opacity", function() { | |
| var opacity = d3.interpolate(0, 7); | |
| return function(t) { | |
| interOpacity = opacity(t); | |
| svg.selectAll(".logo").style('stroke-width',interOpacity); | |
| }; | |
| }) | |
| .transition() | |
| .duration(duration/2) | |
| .tween("opacity", function() { | |
| var opacity = d3.interpolate(7,3); | |
| return function(t) { | |
| interOpacity = opacity(t); | |
| svg.selectAll(".logo").style('stroke-width',interOpacity); | |
| }; | |
| }) | |
| } | |
| } |
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| .main_lines { | |
| fill:none; | |
| stroke-width:1px; | |
| stroke: #777; | |
| stroke-linejoin: round; | |
| } | |
| .logo_lines { | |
| fill:none; | |
| stroke-width:1px; | |
| stroke: #e9cc0c; | |
| stroke-linejoin: round; | |
| stroke-opacity:0; | |
| } | |
| .logo{ | |
| fill:rgb(27,0,109); | |
| fill-opacity:0; | |
| stroke-width:0px; | |
| stroke:rgb(27,0,109); | |
| stroke-opacity:1; | |
| } | |
| #info{ | |
| font-family:sans-serif; | |
| font-size: 20px; | |
| text-anchor:middle; | |
| fill:#777; | |
| opactiy:0; | |
| } |
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