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354 lines
13 KiB
JavaScript
354 lines
13 KiB
JavaScript
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/*****
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* A no-frills tooltip implementation.
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*****/
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(function() {
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window.nv.tooltip = {};
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/* Model which can be instantiated to handle tooltip rendering.
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*/
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window.nv.models.tooltip = function() {
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var content = null //HTML contents of the tooltip. If null, the content is generated via the data variable.
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, data = null /* Tooltip data. If data is given in the proper format, a consistent tooltip is generated.
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Format of data:
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{
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key: "Date",
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value: "August 2009",
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seriesSelectedKey: "Series 2",
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series: [
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{
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key: "Series 1",
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value: "Value 1",
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color: "#000"
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},
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{
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key: "Series 2",
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value: "Value 2",
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color: "#00f"
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}
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]
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}
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*/
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, gravity = 'w' //Can be 'n','s','e','w'. Determines how tooltip is positioned.
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, distance = 50 //Distance to offset tooltip from the mouse location.
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, snapDistance = 25 //Tolerance allowed before tooltip is moved from its current position (creates 'snapping' effect)
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, fixedTop = null //If not null, this fixes the top position of the tooltip.
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, classes = null //Attaches additional CSS classes to the tooltip DIV that is created.
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, chartContainer = null //Parent container that holds the chart.
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, position = {left: null, top: null} //Relative position of the tooltip inside chartContainer.
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, enabled = true //True -> tooltips are rendered. False -> don't render tooltips.
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;
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var valueFormatter = function(d,i) {
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return d;
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};
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var contentGenerator = function(d) {
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if (content != null) return content;
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if (d == null) return '';
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var html = "<table><thead><tr><td colspan='3'><strong class='x-value'>" + d.value + "</strong></td></tr></thead><tbody>";
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if (d.series instanceof Array) {
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d.series.forEach(function(item, i) {
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var isSelected = (item.key === d.seriesSelectedKey) ? "selected" : "";
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html += "<tr class='" + isSelected + "'>";
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html += "<td class='legend'><div style='background-color: " + item.color + ";'></div></td>";
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html += "<td class='key'>" + item.key + ":</td>";
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html += "<td class='value'>" + valueFormatter(item.value,i) + "</td></tr>";
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});
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}
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html += "</tbody></table>";
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return html;
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};
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var dataSeriesExists = function(d) {
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if (d && d.series && d.series.length > 0) return true;
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return false;
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};
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//In situations where the chart is in a 'viewBox', re-position the tooltip based on how far chart is zoomed.
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function convertViewBoxRatio() {
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if (chartContainer) {
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var svg = d3.select(chartContainer).select('svg');
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var viewBox = (svg.node()) ? svg.attr('viewBox') : null;
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if (viewBox) {
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viewBox = viewBox.split(' ');
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var ratio = parseInt(svg.style('width')) / viewBox[2];
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position.left = position.left * ratio;
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position.top = position.top * ratio;
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}
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}
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}
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//Creates new tooltip container, or uses existing one on DOM.
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function getTooltipContainer(newContent) {
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var container = document.getElementsByClassName("nvtooltip");
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if (container.length === 0) {
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//Create new tooltip div if it doesn't exist on DOM.
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container = document.createElement('div');
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container.className = 'nvtooltip ' + (classes ? classes : 'xy-tooltip');
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var body = document.getElementsByTagName('body')[0]; //All new tooltips are placed directly on <body>
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body.appendChild(container);
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}
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else {
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//Element already exists on DOM, so reuse it.
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container = container[0];
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}
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container.innerHTML = newContent;
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return container;
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}
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//Draw the tooltip onto the DOM.
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function nvtooltip() {
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if (!enabled) return;
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if (!dataSeriesExists(data)) return;
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convertViewBoxRatio();
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var left = position.left;
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var top = (fixedTop != null) ? fixedTop : position.top;
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if (chartContainer) {
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left += (chartContainer.offsetLeft || 0);
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top += (chartContainer.offsetTop || 0);
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}
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if (snapDistance && snapDistance > 0) {
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top = Math.floor(top/snapDistance) * snapDistance;
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}
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var container = getTooltipContainer(contentGenerator(data));
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nv.tooltip.calcTooltipPosition([left,top], gravity, distance, container);
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return nvtooltip;
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};
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nvtooltip.content = function(_) {
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if (!arguments.length) return content;
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content = _;
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return nvtooltip;
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};
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nvtooltip.contentGenerator = function(_) {
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if (!arguments.length) return contentGenerator;
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if (typeof _ === 'function') {
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contentGenerator = _;
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}
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return nvtooltip;
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};
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nvtooltip.data = function(_) {
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if (!arguments.length) return data;
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data = _;
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return nvtooltip;
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};
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nvtooltip.gravity = function(_) {
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if (!arguments.length) return gravity;
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gravity = _;
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return nvtooltip;
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};
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nvtooltip.distance = function(_) {
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if (!arguments.length) return distance;
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distance = _;
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return nvtooltip;
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};
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nvtooltip.snapDistance = function(_) {
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if (!arguments.length) return snapDistance;
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snapDistance = _;
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return nvtooltip;
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};
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nvtooltip.classes = function(_) {
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if (!arguments.length) return classes;
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classes = _;
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return nvtooltip;
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};
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nvtooltip.chartContainer = function(_) {
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if (!arguments.length) return chartContainer;
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chartContainer = _;
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return nvtooltip;
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};
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nvtooltip.position = function(_) {
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if (!arguments.length) return position;
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position.left = (typeof _.left !== 'undefined') ? _.left : position.left;
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position.top = (typeof _.top !== 'undefined') ? _.top : position.top;
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return nvtooltip;
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};
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nvtooltip.fixedTop = function(_) {
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if (!arguments.length) return fixedTop;
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fixedTop = _;
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return nvtooltip;
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};
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nvtooltip.enabled = function(_) {
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if (!arguments.length) return enabled;
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enabled = _;
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return nvtooltip;
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};
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nvtooltip.valueFormatter = function(_) {
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if (!arguments.length) return valueFormatter;
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if (typeof _ === 'function') {
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valueFormatter = _;
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}
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return nvtooltip;
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};
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return nvtooltip;
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};
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//Original tooltip.show function. Kept for backward compatibility.
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nv.tooltip.show = function(pos, content, gravity, dist, parentContainer, classes) {
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//Create new tooltip div if it doesn't exist on DOM.
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var container = document.createElement('div');
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container.className = 'nvtooltip ' + (classes ? classes : 'xy-tooltip');
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var body = parentContainer;
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if ( !parentContainer || parentContainer.tagName.match(/g|svg/i)) {
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//If the parent element is an SVG element, place tooltip in the <body> element.
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body = document.getElementsByTagName('body')[0];
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}
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container.style.left = 0;
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container.style.top = 0;
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container.style.opacity = 0;
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container.innerHTML = content;
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body.appendChild(container);
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nv.tooltip.calcTooltipPosition(pos, gravity, dist, container);
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};
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//Global utility function to render a tooltip on the DOM.
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nv.tooltip.calcTooltipPosition = function(pos, gravity, dist, container) {
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var height = parseInt(container.offsetHeight),
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width = parseInt(container.offsetWidth),
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windowWidth = nv.utils.windowSize().width,
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windowHeight = nv.utils.windowSize().height,
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scrollTop = window.scrollY,
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scrollLeft = window.scrollX,
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left, top;
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windowHeight = window.innerWidth >= document.body.scrollWidth ? windowHeight : windowHeight - 16;
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windowWidth = window.innerHeight >= document.body.scrollHeight ? windowWidth : windowWidth - 16;
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gravity = gravity || 's';
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dist = dist || 20;
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var tooltipTop = function ( Elem ) {
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var offsetTop = top;
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if (Elem.offsetParent.tagName === 'BODY') return offsetTop;
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do {
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if( !isNaN( Elem.offsetTop ) ) {
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offsetTop += (Elem.offsetTop);
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}
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} while( Elem = Elem.offsetParent );
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return offsetTop;
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}
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var tooltipLeft = function ( Elem ) {
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var offsetLeft = left;
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if (Elem.offsetParent.tagName === 'BODY') return offsetLeft;
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do {
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if( !isNaN( Elem.offsetLeft ) ) {
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offsetLeft += (Elem.offsetLeft);
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}
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} while( Elem = Elem.offsetParent );
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return offsetLeft;
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}
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switch (gravity) {
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case 'e':
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left = pos[0] - width - dist;
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top = pos[1] - (height / 2);
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var tLeft = tooltipLeft(container);
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var tTop = tooltipTop(container);
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if (tLeft < scrollLeft) left = pos[0] + dist > scrollLeft ? pos[0] + dist : scrollLeft - tLeft + left;
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if (tTop < scrollTop) top = scrollTop - tTop + top;
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if (tTop + height > scrollTop + windowHeight) top = scrollTop + windowHeight - tTop + top - height;
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break;
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case 'w':
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left = pos[0] + dist;
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top = pos[1] - (height / 2);
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var tLeft = tooltipLeft(container);
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var tTop = tooltipTop(container);
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if (tLeft + width > windowWidth) left = pos[0] - width - dist;
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if (tTop < scrollTop) top = scrollTop + 5;
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if (tTop + height > scrollTop + windowHeight) top = scrollTop - height - 5;
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break;
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case 'n':
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left = pos[0] - (width / 2) - 5;
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top = pos[1] + dist;
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var tLeft = tooltipLeft(container);
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var tTop = tooltipTop(container);
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if (tLeft < scrollLeft) left = scrollLeft + 5;
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if (tLeft + width > windowWidth) left = left - width/2 + 5;
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if (tTop + height > scrollTop + windowHeight) top = scrollTop + windowHeight - tTop + top - height;
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break;
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case 's':
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left = pos[0] - (width / 2);
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top = pos[1] - height - dist;
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var tLeft = tooltipLeft(container);
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var tTop = tooltipTop(container);
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if (tLeft < scrollLeft) left = scrollLeft + 5;
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if (tLeft + width > windowWidth) left = left - width/2 + 5;
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if (scrollTop > tTop) top = scrollTop;
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break;
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}
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container.style.left = left+'px';
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container.style.top = top+'px';
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container.style.opacity = 1;
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container.style.position = 'absolute'; //fix scroll bar issue
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container.style.pointerEvents = 'none'; //fix scroll bar issue
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return container;
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};
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//Global utility function to remove tooltips from the DOM.
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nv.tooltip.cleanup = function() {
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// Find the tooltips, mark them for removal by this class (so others cleanups won't find it)
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var tooltips = document.getElementsByClassName('nvtooltip');
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var purging = [];
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while(tooltips.length) {
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purging.push(tooltips[0]);
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tooltips[0].style.transitionDelay = '0 !important';
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tooltips[0].style.opacity = 0;
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tooltips[0].className = 'nvtooltip-pending-removal';
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}
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setTimeout(function() {
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while (purging.length) {
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var removeMe = purging.pop();
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removeMe.parentNode.removeChild(removeMe);
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}
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}, 500);
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};
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})();
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