in TestApplications/Web/js/lib/components/c3-0.4.2/c3.js [3743:3953]
c3_chart_internal_fn.updateLegend = function (targetIds, options, transitions) {
var $$ = this, config = $$.config;
var xForLegend, xForLegendText, xForLegendRect, yForLegend, yForLegendText, yForLegendRect;
var paddingTop = 4, paddingRight = 10, maxWidth = 0, maxHeight = 0, posMin = 10, tileWidth = 15;
var l, totalLength = 0, offsets = {}, widths = {}, heights = {}, margins = [0], steps = {}, step = 0;
var withTransition, withTransitionForTransform;
var hasFocused = $$.legend.selectAll('.' + CLASS.legendItemFocused).size();
var texts, rects, tiles, background;
options = options || {};
withTransition = getOption(options, "withTransition", true);
withTransitionForTransform = getOption(options, "withTransitionForTransform", true);
function updatePositions(textElement, id, index) {
var reset = index === 0, isLast = index === targetIds.length - 1,
box = $$.getTextRect(textElement.textContent, CLASS.legendItem),
itemWidth = box.width + tileWidth + (isLast && !($$.isLegendRight || $$.isLegendInset) ? 0 : paddingRight),
itemHeight = box.height + paddingTop,
itemLength = $$.isLegendRight || $$.isLegendInset ? itemHeight : itemWidth,
areaLength = $$.isLegendRight || $$.isLegendInset ? $$.getLegendHeight() : $$.getLegendWidth(),
margin, maxLength;
// MEMO: care about condifion of step, totalLength
function updateValues(id, withoutStep) {
if (!withoutStep) {
margin = (areaLength - totalLength - itemLength) / 2;
if (margin < posMin) {
margin = (areaLength - itemLength) / 2;
totalLength = 0;
step++;
}
}
steps[id] = step;
margins[step] = $$.isLegendInset ? 10 : margin;
offsets[id] = totalLength;
totalLength += itemLength;
}
if (reset) {
totalLength = 0;
step = 0;
maxWidth = 0;
maxHeight = 0;
}
if (config.legend_show && !$$.isLegendToShow(id)) {
widths[id] = heights[id] = steps[id] = offsets[id] = 0;
return;
}
widths[id] = itemWidth;
heights[id] = itemHeight;
if (!maxWidth || itemWidth >= maxWidth) { maxWidth = itemWidth; }
if (!maxHeight || itemHeight >= maxHeight) { maxHeight = itemHeight; }
maxLength = $$.isLegendRight || $$.isLegendInset ? maxHeight : maxWidth;
if (config.legend_equally) {
Object.keys(widths).forEach(function (id) { widths[id] = maxWidth; });
Object.keys(heights).forEach(function (id) { heights[id] = maxHeight; });
margin = (areaLength - maxLength * targetIds.length) / 2;
if (margin < posMin) {
totalLength = 0;
step = 0;
targetIds.forEach(function (id) { updateValues(id); });
}
else {
updateValues(id, true);
}
} else {
updateValues(id);
}
}
if ($$.isLegendInset) {
step = config.legend_inset_step ? config.legend_inset_step : targetIds.length;
$$.updateLegendStep(step);
}
if ($$.isLegendRight) {
xForLegend = function (id) { return maxWidth * steps[id]; };
yForLegend = function (id) { return margins[steps[id]] + offsets[id]; };
} else if ($$.isLegendInset) {
xForLegend = function (id) { return maxWidth * steps[id] + 10; };
yForLegend = function (id) { return margins[steps[id]] + offsets[id]; };
} else {
xForLegend = function (id) { return margins[steps[id]] + offsets[id]; };
yForLegend = function (id) { return maxHeight * steps[id]; };
}
xForLegendText = function (id, i) { return xForLegend(id, i) + 14; };
yForLegendText = function (id, i) { return yForLegend(id, i) + 9; };
xForLegendRect = function (id, i) { return xForLegend(id, i); };
yForLegendRect = function (id, i) { return yForLegend(id, i) - 5; };
// Define g for legend area
l = $$.legend.selectAll('.' + CLASS.legendItem)
.data(targetIds)
.enter().append('g')
.attr('class', function (id) { return $$.generateClass(CLASS.legendItem, id); })
.style('visibility', function (id) { return $$.isLegendToShow(id) ? 'visible' : 'hidden'; })
.style('cursor', 'pointer')
.on('click', function (id) {
if (config.legend_item_onclick) {
config.legend_item_onclick.call($$, id);
} else {
if ($$.d3.event.altKey) {
$$.api.hide();
$$.api.show(id);
} else {
$$.api.toggle(id);
$$.isTargetToShow(id) ? $$.api.focus(id) : $$.api.revert();
}
}
})
.on('mouseover', function (id) {
$$.d3.select(this).classed(CLASS.legendItemFocused, true);
if (!$$.transiting && $$.isTargetToShow(id)) {
$$.api.focus(id);
}
if (config.legend_item_onmouseover) {
config.legend_item_onmouseover.call($$, id);
}
})
.on('mouseout', function (id) {
$$.d3.select(this).classed(CLASS.legendItemFocused, false);
$$.api.revert();
if (config.legend_item_onmouseout) {
config.legend_item_onmouseout.call($$, id);
}
});
l.append('text')
.text(function (id) { return isDefined(config.data_names[id]) ? config.data_names[id] : id; })
.each(function (id, i) { updatePositions(this, id, i); })
.style("pointer-events", "none")
.attr('x', $$.isLegendRight || $$.isLegendInset ? xForLegendText : -200)
.attr('y', $$.isLegendRight || $$.isLegendInset ? -200 : yForLegendText);
l.append('rect')
.attr("class", CLASS.legendItemEvent)
.style('fill-opacity', 0)
.attr('x', $$.isLegendRight || $$.isLegendInset ? xForLegendRect : -200)
.attr('y', $$.isLegendRight || $$.isLegendInset ? -200 : yForLegendRect);
l.append('rect')
.attr("class", CLASS.legendItemTile)
.style("pointer-events", "none")
.style('fill', $$.color)
.attr('x', $$.isLegendRight || $$.isLegendInset ? xForLegendText : -200)
.attr('y', $$.isLegendRight || $$.isLegendInset ? -200 : yForLegend)
.attr('width', 10)
.attr('height', 10);
// Set background for inset legend
background = $$.legend.select('.' + CLASS.legendBackground + ' rect');
if ($$.isLegendInset && maxWidth > 0 && background.size() === 0) {
background = $$.legend.insert('g', '.' + CLASS.legendItem)
.attr("class", CLASS.legendBackground)
.append('rect');
}
texts = $$.legend.selectAll('text')
.data(targetIds)
.text(function (id) { return isDefined(config.data_names[id]) ? config.data_names[id] : id; }) // MEMO: needed for update
.each(function (id, i) { updatePositions(this, id, i); });
(withTransition ? texts.transition() : texts)
.attr('x', xForLegendText)
.attr('y', yForLegendText);
rects = $$.legend.selectAll('rect.' + CLASS.legendItemEvent)
.data(targetIds);
(withTransition ? rects.transition() : rects)
.attr('width', function (id) { return widths[id]; })
.attr('height', function (id) { return heights[id]; })
.attr('x', xForLegendRect)
.attr('y', yForLegendRect);
tiles = $$.legend.selectAll('rect.' + CLASS.legendItemTile)
.data(targetIds);
(withTransition ? tiles.transition() : tiles)
.style('fill', $$.color)
.attr('x', xForLegend)
.attr('y', yForLegend);
if (background) {
(withTransition ? background.transition() : background)
.attr('height', $$.getLegendHeight() - 12)
.attr('width', maxWidth * (step + 1) + 10);
}
// toggle legend state
$$.legend.selectAll('.' + CLASS.legendItem)
.classed(CLASS.legendItemHidden, function (id) { return !$$.isTargetToShow(id); })
.transition()
.style('opacity', function (id) {
var This = $$.d3.select(this);
if ($$.isTargetToShow(id)) {
return !hasFocused || This.classed(CLASS.legendItemFocused) ? $$.opacityForLegend(This) : $$.opacityForUnfocusedLegend(This);
} else {
return $$.legendOpacityForHidden;
}
});
// Update all to reflect change of legend
$$.updateLegendItemWidth(maxWidth);
$$.updateLegendItemHeight(maxHeight);
$$.updateLegendStep(step);
// Update size and scale
$$.updateSizes();
$$.updateScales();
$$.updateSvgSize();
// Update g positions
$$.transformAll(withTransitionForTransform, transitions);
};