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+/* Tooltip rendering model for nvd3 charts.
+window.nv.models.tooltip is the updated,new way to render tooltips.
+
+window.nv.tooltip.show is the old tooltip code.
+window.nv.tooltip.* also has various helper methods.
+*/
+(function() {
+ "use strict";
+ window.nv.tooltip = {};
+
+ /* Model which can be instantiated to handle tooltip rendering.
+ Example usage:
+ var tip = nv.models.tooltip().gravity('w').distance(23)
+ .data(myDataObject);
+
+ tip(); //just invoke the returned function to render tooltip.
+ */
+ window.nv.models.tooltip = function() {
+ var content = null //HTML contents of the tooltip. If null, the content is generated via the data variable.
+ , data = null /* Tooltip data. If data is given in the proper format, a consistent tooltip is generated.
+ Format of data:
+ {
+ key: "Date",
+ value: "August 2009",
+ series: [
+ {
+ key: "Series 1",
+ value: "Value 1",
+ color: "#000"
+ },
+ {
+ key: "Series 2",
+ value: "Value 2",
+ color: "#00f"
+ }
+ ]
+
+ }
+
+ */
+ , gravity = 'w' //Can be 'n','s','e','w'. Determines how tooltip is positioned.
+ , distance = 50 //Distance to offset tooltip from the mouse location.
+ , snapDistance = 25 //Tolerance allowed before tooltip is moved from its current position (creates 'snapping' effect)
+ , fixedTop = null //If not null, this fixes the top position of the tooltip.
+ , classes = null //Attaches additional CSS classes to the tooltip DIV that is created.
+ , chartContainer = null //Parent DIV, of the SVG Container that holds the chart.
+ , tooltipElem = null //actual DOM element representing the tooltip.
+ , position = {left: null, top: null} //Relative position of the tooltip inside chartContainer.
+ , enabled = true //True -> tooltips are rendered. False -> don't render tooltips.
+ //Generates a unique id when you create a new tooltip() object
+ , id = "nvtooltip-" + Math.floor(Math.random() * 100000)
+ ;
+
+ //CSS class to specify whether element should not have mouse events.
+ var nvPointerEventsClass = "nv-pointer-events-none";
+
+ //Format function for the tooltip values column
+ var valueFormatter = function(d,i) {
+ return d;
+ };
+
+ //Format function for the tooltip header value.
+ var headerFormatter = function(d) {
+ return d;
+ };
+
+ //By default, the tooltip model renders a beautiful table inside a DIV.
+ //You can override this function if a custom tooltip is desired.
+ var contentGenerator = function(d) {
+ if (content != null) return content;
+
+ if (d == null) return '';
+
+ var table = d3.select(document.createElement("table"));
+ var theadEnter = table.selectAll("thead")
+ .data([d])
+ .enter().append("thead");
+ theadEnter.append("tr")
+ .append("td")
+ .attr("colspan",3)
+ .append("strong")
+ .classed("x-value",true)
+ .html(headerFormatter(d.value));
+
+ var tbodyEnter = table.selectAll("tbody")
+ .data([d])
+ .enter().append("tbody");
+ var trowEnter = tbodyEnter.selectAll("tr")
+ .data(function(p) { return p.series})
+ .enter()
+ .append("tr")
+ .classed("highlight", function(p) { return p.highlight})
+ ;
+
+ trowEnter.append("td")
+ .classed("legend-color-guide",true)
+ .append("div")
+ .style("background-color", function(p) { return p.color});
+ trowEnter.append("td")
+ .classed("key",true)
+ .html(function(p) {return p.key});
+ trowEnter.append("td")
+ .classed("value",true)
+ .html(function(p,i) { return valueFormatter(p.value,i) });
+
+
+ trowEnter.selectAll("td").each(function(p) {
+ if (p.highlight) {
+ var opacityScale = d3.scale.linear().domain([0,1]).range(["#fff",p.color]);
+ var opacity = 0.6;
+ d3.select(this)
+ .style("border-bottom-color", opacityScale(opacity))
+ .style("border-top-color", opacityScale(opacity))
+ ;
+ }
+ });
+
+ var html = table.node().outerHTML;
+ if (d.footer !== undefined)
+ html += "<div class='footer'>" + d.footer + "</div>";
+ return html;
+
+ };
+
+ var dataSeriesExists = function(d) {
+ if (d && d.series && d.series.length > 0) return true;
+
+ return false;
+ };
+
+ //In situations where the chart is in a 'viewBox', re-position the tooltip based on how far chart is zoomed.
+ function convertViewBoxRatio() {
+ if (chartContainer) {
+ var svg = d3.select(chartContainer);
+ if (svg.node().tagName !== "svg") {
+ svg = svg.select("svg");
+ }
+ var viewBox = (svg.node()) ? svg.attr('viewBox') : null;
+ if (viewBox) {
+ viewBox = viewBox.split(' ');
+ var ratio = parseInt(svg.style('width')) / viewBox[2];
+
+ position.left = position.left * ratio;
+ position.top = position.top * ratio;
+ }
+ }
+ }
+
+ //Creates new tooltip container, or uses existing one on DOM.
+ function getTooltipContainer(newContent) {
+ var body;
+ if (chartContainer)
+ body = d3.select(chartContainer);
+ else
+ body = d3.select("body");
+
+ var container = body.select(".nvtooltip");
+ if (container.node() === null) {
+ //Create new tooltip div if it doesn't exist on DOM.
+ container = body.append("div")
+ .attr("class", "nvtooltip " + (classes? classes: "xy-tooltip"))
+ .attr("id",id)
+ ;
+ }
+
+
+ container.node().innerHTML = newContent;
+ container.style("top",0).style("left",0).style("opacity",0);
+ container.selectAll("div, table, td, tr").classed(nvPointerEventsClass,true)
+ container.classed(nvPointerEventsClass,true);
+ return container.node();
+ }
+
+
+
+ //Draw the tooltip onto the DOM.
+ function nvtooltip() {
+ if (!enabled) return;
+ if (!dataSeriesExists(data)) return;
+
+ convertViewBoxRatio();
+
+ var left = position.left;
+ var top = (fixedTop != null) ? fixedTop : position.top;
+ var container = getTooltipContainer(contentGenerator(data));
+ tooltipElem = container;
+ if (chartContainer) {
+ var svgComp = chartContainer.getElementsByTagName("svg")[0];
+ var boundRect = (svgComp) ? svgComp.getBoundingClientRect() : chartContainer.getBoundingClientRect();
+ var svgOffset = {left:0,top:0};
+ if (svgComp) {
+ var svgBound = svgComp.getBoundingClientRect();
+ var chartBound = chartContainer.getBoundingClientRect();
+ var svgBoundTop = svgBound.top;
+
+ //Defensive code. Sometimes, svgBoundTop can be a really negative
+ // number, like -134254. That's a bug.
+ // If such a number is found, use zero instead. FireFox bug only
+ if (svgBoundTop < 0) {
+ var containerBound = chartContainer.getBoundingClientRect();
+ svgBoundTop = (Math.abs(svgBoundTop) > containerBound.height) ? 0 : svgBoundTop;
+ }
+ svgOffset.top = Math.abs(svgBoundTop - chartBound.top);
+ svgOffset.left = Math.abs(svgBound.left - chartBound.left);
+ }
+ //If the parent container is an overflow <div> with scrollbars, subtract the scroll offsets.
+ //You need to also add any offset between the <svg> element and its containing <div>
+ //Finally, add any offset of the containing <div> on the whole page.
+ left += chartContainer.offsetLeft + svgOffset.left - 2*chartContainer.scrollLeft;
+ top += chartContainer.offsetTop + svgOffset.top - 2*chartContainer.scrollTop;
+ }
+
+ if (snapDistance && snapDistance > 0) {
+ top = Math.floor(top/snapDistance) * snapDistance;
+ }
+
+ nv.tooltip.calcTooltipPosition([left,top], gravity, distance, container);
+ return nvtooltip;
+ };
+
+ nvtooltip.nvPointerEventsClass = nvPointerEventsClass;
+
+ nvtooltip.content = function(_) {
+ if (!arguments.length) return content;
+ content = _;
+ return nvtooltip;
+ };
+
+ //Returns tooltipElem...not able to set it.
+ nvtooltip.tooltipElem = function() {
+ return tooltipElem;
+ };
+
+ nvtooltip.contentGenerator = function(_) {
+ if (!arguments.length) return contentGenerator;
+ if (typeof _ === 'function') {
+ contentGenerator = _;
+ }
+ return nvtooltip;
+ };
+
+ nvtooltip.data = function(_) {
+ if (!arguments.length) return data;
+ data = _;
+ return nvtooltip;
+ };
+
+ nvtooltip.gravity = function(_) {
+ if (!arguments.length) return gravity;
+ gravity = _;
+ return nvtooltip;
+ };
+
+ nvtooltip.distance = function(_) {
+ if (!arguments.length) return distance;
+ distance = _;
+ return nvtooltip;
+ };
+
+ nvtooltip.snapDistance = function(_) {
+ if (!arguments.length) return snapDistance;
+ snapDistance = _;
+ return nvtooltip;
+ };
+
+ nvtooltip.classes = function(_) {
+ if (!arguments.length) return classes;
+ classes = _;
+ return nvtooltip;
+ };
+
+ nvtooltip.chartContainer = function(_) {
+ if (!arguments.length) return chartContainer;
+ chartContainer = _;
+ return nvtooltip;
+ };
+
+ nvtooltip.position = function(_) {
+ if (!arguments.length) return position;
+ position.left = (typeof _.left !== 'undefined') ? _.left : position.left;
+ position.top = (typeof _.top !== 'undefined') ? _.top : position.top;
+ return nvtooltip;
+ };
+
+ nvtooltip.fixedTop = function(_) {
+ if (!arguments.length) return fixedTop;
+ fixedTop = _;
+ return nvtooltip;
+ };
+
+ nvtooltip.enabled = function(_) {
+ if (!arguments.length) return enabled;
+ enabled = _;
+ return nvtooltip;
+ };
+
+ nvtooltip.valueFormatter = function(_) {
+ if (!arguments.length) return valueFormatter;
+ if (typeof _ === 'function') {
+ valueFormatter = _;
+ }
+ return nvtooltip;
+ };
+
+ nvtooltip.headerFormatter = function(_) {
+ if (!arguments.length) return headerFormatter;
+ if (typeof _ === 'function') {
+ headerFormatter = _;
+ }
+ return nvtooltip;
+ };
+
+ //id() is a read-only function. You can't use it to set the id.
+ nvtooltip.id = function() {
+ return id;
+ };
+
+
+ return nvtooltip;
+ };
+
+
+ //Original tooltip.show function. Kept for backward compatibility.
+ // pos = [left,top]
+ nv.tooltip.show = function(pos, content, gravity, dist, parentContainer, classes) {
+
+ //Create new tooltip div if it doesn't exist on DOM.
+ var container = document.createElement('div');
+ container.className = 'nvtooltip ' + (classes ? classes : 'xy-tooltip');
+
+ var body = parentContainer;
+ if ( !parentContainer || parentContainer.tagName.match(/g|svg/i)) {
+ //If the parent element is an SVG element, place tooltip in the <body> element.
+ body = document.getElementsByTagName('body')[0];
+ }
+
+ container.style.left = 0;
+ container.style.top = 0;
+ container.style.opacity = 0;
+ container.innerHTML = content;
+ body.appendChild(container);
+
+ //If the parent container is an overflow <div> with scrollbars, subtract the scroll offsets.
+ if (parentContainer) {
+ pos[0] = pos[0] - parentContainer.scrollLeft;
+ pos[1] = pos[1] - parentContainer.scrollTop;
+ }
+ nv.tooltip.calcTooltipPosition(pos, gravity, dist, container);
+ };
+
+ //Looks up the ancestry of a DOM element, and returns the first NON-svg node.
+ nv.tooltip.findFirstNonSVGParent = function(Elem) {
+ while(Elem.tagName.match(/^g|svg$/i) !== null) {
+ Elem = Elem.parentNode;
+ }
+ return Elem;
+ };
+
+ //Finds the total offsetTop of a given DOM element.
+ //Looks up the entire ancestry of an element, up to the first relatively positioned element.
+ nv.tooltip.findTotalOffsetTop = function ( Elem, initialTop ) {
+ var offsetTop = initialTop;
+
+ do {
+ if( !isNaN( Elem.offsetTop ) ) {
+ offsetTop += (Elem.offsetTop);
+ }
+ } while( Elem = Elem.offsetParent );
+ return offsetTop;
+ };
+
+ //Finds the total offsetLeft of a given DOM element.
+ //Looks up the entire ancestry of an element, up to the first relatively positioned element.
+ nv.tooltip.findTotalOffsetLeft = function ( Elem, initialLeft) {
+ var offsetLeft = initialLeft;
+
+ do {
+ if( !isNaN( Elem.offsetLeft ) ) {
+ offsetLeft += (Elem.offsetLeft);
+ }
+ } while( Elem = Elem.offsetParent );
+ return offsetLeft;
+ };
+
+ //Global utility function to render a tooltip on the DOM.
+ //pos = [left,top] coordinates of where to place the tooltip, relative to the SVG chart container.
+ //gravity = how to orient the tooltip
+ //dist = how far away from the mouse to place tooltip
+ //container = tooltip DIV
+ nv.tooltip.calcTooltipPosition = function(pos, gravity, dist, container) {
+
+ var height = parseInt(container.offsetHeight),
+ width = parseInt(container.offsetWidth),
+ windowWidth = nv.utils.windowSize().width,
+ windowHeight = nv.utils.windowSize().height,
+ scrollTop = window.pageYOffset,
+ scrollLeft = window.pageXOffset,
+ left, top;
+
+ windowHeight = window.innerWidth >= document.body.scrollWidth ? windowHeight : windowHeight - 16;
+ windowWidth = window.innerHeight >= document.body.scrollHeight ? windowWidth : windowWidth - 16;
+
+ gravity = gravity || 's';
+ dist = dist || 20;
+
+ var tooltipTop = function ( Elem ) {
+ return nv.tooltip.findTotalOffsetTop(Elem, top);
+ };
+
+ var tooltipLeft = function ( Elem ) {
+ return nv.tooltip.findTotalOffsetLeft(Elem,left);
+ };
+
+ switch (gravity) {
+ case 'e':
+ left = pos[0] - width - dist;
+ top = pos[1] - (height / 2);
+ var tLeft = tooltipLeft(container);
+ var tTop = tooltipTop(container);
+ if (tLeft < scrollLeft) left = pos[0] + dist > scrollLeft ? pos[0] + dist : scrollLeft - tLeft + left;
+ if (tTop < scrollTop) top = scrollTop - tTop + top;
+ if (tTop + height > scrollTop + windowHeight) top = scrollTop + windowHeight - tTop + top - height;
+ break;
+ case 'w':
+ left = pos[0] + dist;
+ top = pos[1] - (height / 2);
+ var tLeft = tooltipLeft(container);
+ var tTop = tooltipTop(container);
+ if (tLeft + width > windowWidth) left = pos[0] - width - dist;
+ if (tTop < scrollTop) top = scrollTop + 5;
+ if (tTop + height > scrollTop + windowHeight) top = scrollTop + windowHeight - tTop + top - height;
+ break;
+ case 'n':
+ left = pos[0] - (width / 2) - 5;
+ top = pos[1] + dist;
+ var tLeft = tooltipLeft(container);
+ var tTop = tooltipTop(container);
+ if (tLeft < scrollLeft) left = scrollLeft + 5;
+ if (tLeft + width > windowWidth) left = left - width/2 + 5;
+ if (tTop + height > scrollTop + windowHeight) top = scrollTop + windowHeight - tTop + top - height;
+ break;
+ case 's':
+ left = pos[0] - (width / 2);
+ top = pos[1] - height - dist;
+ var tLeft = tooltipLeft(container);
+ var tTop = tooltipTop(container);
+ if (tLeft < scrollLeft) left = scrollLeft + 5;
+ if (tLeft + width > windowWidth) left = left - width/2 + 5;
+ if (scrollTop > tTop) top = scrollTop;
+ break;
+ case 'none':
+ left = pos[0];
+ top = pos[1] - dist;
+ var tLeft = tooltipLeft(container);
+ var tTop = tooltipTop(container);
+ break;
+ }
+
+
+ container.style.left = left+'px';
+ container.style.top = top+'px';
+ container.style.opacity = 1;
+ container.style.position = 'absolute';
+
+ return container;
+ };
+
+ //Global utility function to remove tooltips from the DOM.
+ nv.tooltip.cleanup = function() {
+
+ // Find the tooltips, mark them for removal by this class (so others cleanups won't find it)
+ var tooltips = document.getElementsByClassName('nvtooltip');
+ var purging = [];
+ while(tooltips.length) {
+ purging.push(tooltips[0]);
+ tooltips[0].style.transitionDelay = '0 !important';
+ tooltips[0].style.opacity = 0;
+ tooltips[0].className = 'nvtooltip-pending-removal';
+ }
+
+ setTimeout(function() {
+
+ while (purging.length) {
+ var removeMe = purging.pop();
+ removeMe.parentNode.removeChild(removeMe);
+ }
+ }, 500);
+ };
+
+})();