Example for Cooperative Brushing and Tooltips in D3.
The tooltip helper function for dynamic tooltips.
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December 29, 2015 06:39
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D3 Tooltips
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| //Pattern from: http://www.biovisualize.com/2012/07/embedding-d3js-in-blog-post.html | |
| d3.helper = {}; | |
| d3.helper.tooltip = function(){ | |
| var tooltipDiv; | |
| var bodyNode = d3.select('body').node(); | |
| function tooltip(selection){ | |
| selection.on('mouseover.tooltip', function(pD, pI){ | |
| // Clean up lost tooltips | |
| d3.select('.body').selectAll('div.tooltip').remove(); | |
| // Append tooltip | |
| tooltipDiv = d3.select('body') | |
| .append('div') | |
| .attr('class', 'tooltip'); | |
| var absoluteMousePos = d3.mouse(bodyNode); | |
| tooltipDiv.style({ | |
| left: (absoluteMousePos[0] + 5)+'px', | |
| top: (absoluteMousePos[1]) + 'px', | |
| 'background-color': '#d8d5e4', | |
| width: '65px', | |
| height: '30px', | |
| padding: '5px', | |
| position: 'absolute', | |
| 'z-index': 1001, | |
| 'box-shadow': '0 1px 2px 0 #656565' | |
| }); | |
| var first_line = '<p class="tooltip">X-Value: ' + pD.index + '</p>'; | |
| var second_line = '<p class="tooltip">Y-Value: ' + pD.value + '</p>'; | |
| tooltipDiv.html(first_line + second_line); | |
| }) | |
| .on('mousemove.tooltip', function(pD, pI){ | |
| // Move tooltip | |
| var absoluteMousePos = d3.mouse(bodyNode); | |
| tooltipDiv.style({ | |
| left: (absoluteMousePos[0] + 5)+'px', | |
| top: (absoluteMousePos[1])+'px' | |
| }); | |
| }) | |
| .on('mouseout.tooltip', function(pD, pI){ | |
| // Remove tooltip | |
| tooltipDiv.remove(); | |
| }); | |
| } | |
| tooltip.attr = function(_x){ | |
| if (!arguments.length) return attrs; | |
| attrs = _x; | |
| return this; | |
| }; | |
| tooltip.style = function(_x){ | |
| if (!arguments.length) return styles; | |
| styles = _x; | |
| return this; | |
| }; | |
| return tooltip; | |
| }; |
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