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Analog Clock
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .clockGroup { stroke: #000; stroke-width: 2; } | |
| .hand { corner-radius: 2 } | |
| .hand#hour { stroke-width: 10 } | |
| .hand#minute { stroke-width: 5 } | |
| .hand#second { stroke-width: 2 } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var svg, | |
| width = 960, | |
| height = 500, | |
| margin = 20, | |
| clock_radius = height / 2 - margin; | |
| var hand_data = [ | |
| { | |
| 'hand': 'hour', | |
| 'value': 0, | |
| 'arc' : d3.svg.arc() | |
| .innerRadius(0).outerRadius(3 * clock_radius / 4) | |
| .startAngle(0).endAngle(0), | |
| 'scale': d3.scale.linear() | |
| .domain([0, 12]).range([0, 2 * Math.PI]) | |
| }, | |
| { | |
| 'hand': 'minute', | |
| 'value': 0, | |
| 'arc': d3.svg.arc() | |
| .innerRadius(0).outerRadius(clock_radius - 10) | |
| .startAngle(0).endAngle(0), | |
| 'scale': d3.scale.linear() | |
| .domain([0, 60]).range([0, 2 * Math.PI]) | |
| }, | |
| { | |
| 'hand': 'second', | |
| 'value': 0, | |
| 'arc': d3.svg.arc() | |
| .innerRadius(0).outerRadius(clock_radius - 10) | |
| .startAngle(0).endAngle(0), | |
| 'scale': d3.scale.linear() | |
| .domain([0, 60]).range([0, 2 * Math.PI]) | |
| } | |
| ]; | |
| function draw_clock() { | |
| svg = d3.select('body').append('svg') | |
| .attr('width', width) | |
| .attr('height', height) | |
| .append('g') | |
| .attr('class', 'clockGroup') | |
| .attr('transform', 'translate(' + width / 2 + | |
| ',' + height / 2 + ')'); | |
| // Outer Circle | |
| svg.append('circle').attr('class', 'clock') | |
| .attr('id', 'outer') | |
| .attr('stroke-width', '2') | |
| .attr('fill', 'white') | |
| .attr('r', clock_radius); | |
| // Clock Hands | |
| svg.selectAll('path.hand').data(hand_data).enter() | |
| .append('path') | |
| .attr('class', 'hand') | |
| .attr('id', function(d) { | |
| return d.hand; | |
| }) | |
| .attr('d', function(d) { | |
| return d.arc(d); | |
| }); | |
| // Inner Circle | |
| svg.append('circle').attr('class', 'clock') | |
| .attr('id', 'inner') | |
| .attr('fill', 'white') | |
| .attr('r', '10'); | |
| } | |
| function get_current_time() { | |
| var now = new Date(), | |
| secs = now.getSeconds(), | |
| mins = now.getMinutes() + (secs / 60), | |
| hours = now.getHours() % 12 + (mins / 60); | |
| hand_data[2].value = secs; | |
| hand_data[1].value = mins; | |
| hand_data[0].value = hours; | |
| } | |
| function update_clock() { | |
| get_current_time(); | |
| svg.selectAll('path.hand') | |
| .each(function(d) { | |
| d.arc.startAngle(d.scale(d.value)) | |
| .endAngle(d.scale(d.value)) | |
| }) | |
| .attr('d', function(d) { | |
| return d.arc(d); | |
| }); | |
| } | |
| draw_clock(); | |
| update_clock(); | |
| setInterval(update_clock, 1000); | |
| </script> | |
| </body> |
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