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c3_chart_internal_fn.initTooltip = function () {
var $$ = this, config = $$.config, i;
$$.tooltip = $$.selectChart
.style("position", "relative")
.append("div")
.attr('class', CLASS.tooltipContainer)
.style("position", "absolute")
.style("pointer-events", "none")
.style("display", "none");
// Show tooltip if needed
if (config.tooltip_init_show) {
if ($$.isTimeSeries() && isString(config.tooltip_init_x)) {
config.tooltip_init_x = $$.parseDate(config.tooltip_init_x);
for (i = 0; i < $$.data.targets[0].values.length; i++) {
if (($$.data.targets[0].values[i].x - config.tooltip_init_x) === 0) { break; }
}
config.tooltip_init_x = i;
}
$$.tooltip.html(config.tooltip_contents.call($$, $$.data.targets.map(function (d) {
return $$.addName(d.values[config.tooltip_init_x]);
}), $$.axis.getXAxisTickFormat(), $$.getYFormat($$.hasArcType()), $$.color));
$$.tooltip.style("top", config.tooltip_init_position.top)
.style("left", config.tooltip_init_position.left)
.style("display", "block");
}
};
c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaultValueFormat, color) {
var $$ = this, config = $$.config,
titleFormat = config.tooltip_format_title || defaultTitleFormat,
nameFormat = config.tooltip_format_name || function (name) { return name; },
valueFormat = config.tooltip_format_value || defaultValueFormat,
text, i, title, value, name, bgcolor;
for (i = 0; i < d.length; i++) {
if (! (d[i] && (d[i].value || d[i].value === 0))) { continue; }
if (! text) {
title = titleFormat ? titleFormat(d[i].x) : d[i].x;
text = "<table class='" + CLASS.tooltip + "'>" + (title || title === 0 ? "<tr><th colspan='2'>" + title + "</th></tr>" : "");
}
value = valueFormat(d[i].value, d[i].ratio, d[i].id, d[i].index);
if (value !== undefined) {
name = nameFormat(d[i].name, d[i].ratio, d[i].id, d[i].index);
bgcolor = $$.levelColor ? $$.levelColor(d[i].value) : color(d[i].id);
text += "<tr class='" + CLASS.tooltipName + "-" + d[i].id + "'>";
text += "<td class='name'><span style='background-color:" + bgcolor + "'></span>" + name + "</td>";
text += "<td class='value'>" + value + "</td>";
text += "</tr>";
}
}
return text + "</table>";
};
c3_chart_internal_fn.tooltipPosition = function (dataToShow, tWidth, tHeight, element) {
var $$ = this, config = $$.config, d3 = $$.d3;
var svgLeft, tooltipLeft, tooltipRight, tooltipTop, chartRight;
var forArc = $$.hasArcType(),
mouse = d3.mouse(element);
// Determin tooltip position
if (forArc) {
tooltipLeft = (($$.width - ($$.isLegendRight ? $$.getLegendWidth() : 0)) / 2) + mouse[0];
tooltipTop = ($$.height / 2) + mouse[1] + 20;
} else {
svgLeft = $$.getSvgLeft(true);
if (config.axis_rotated) {
tooltipLeft = svgLeft + mouse[0] + 100;
tooltipRight = tooltipLeft + tWidth;
chartRight = $$.currentWidth - $$.getCurrentPaddingRight();
tooltipTop = $$.x(dataToShow[0].x) + 20;
} else {
tooltipLeft = svgLeft + $$.getCurrentPaddingLeft(true) + $$.x(dataToShow[0].x) + 20;
tooltipRight = tooltipLeft + tWidth;
chartRight = svgLeft + $$.currentWidth - $$.getCurrentPaddingRight();
tooltipTop = mouse[1] + 15;
}
if (tooltipRight > chartRight) {
// 20 is needed for Firefox to keep tooletip width
tooltipLeft -= tooltipRight - chartRight + 20;
}
if (tooltipTop + tHeight > $$.currentHeight) {
tooltipTop -= tHeight + 30;
}
}
if (tooltipTop < 0) {
tooltipTop = 0;
}
return {top: tooltipTop, left: tooltipLeft};
};
c3_chart_internal_fn.showTooltip = function (selectedData, element) {
var $$ = this, config = $$.config;
var tWidth, tHeight, position;
var forArc = $$.hasArcType(),
dataToShow = selectedData.filter(function (d) { return d && isValue(d.value); }),
positionFunction = config.tooltip_position || c3_chart_internal_fn.tooltipPosition;
if (dataToShow.length === 0 || !config.tooltip_show) {
return;
}
$$.tooltip.html(config.tooltip_contents.call($$, selectedData, $$.axis.getXAxisTickFormat(), $$.getYFormat(forArc), $$.color)).style("display", "block");
// Get tooltip dimensions
tWidth = $$.tooltip.property('offsetWidth');
tHeight = $$.tooltip.property('offsetHeight');
position = positionFunction.call(this, dataToShow, tWidth, tHeight, element);
// Set tooltip
$$.tooltip
.style("top", position.top + "px")
.style("left", position.left + 'px');
};
c3_chart_internal_fn.hideTooltip = function () {
this.tooltip.style("display", "none");
};
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