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Adds an option to inset the legend. 

To use — set the position to “inset”. Then, configure the inset
position by setting anchor to “top-left, top-right, bottom-left, or
bottom-right”, and offset x and/or y.

For example:
legend: {
     position: "inset",
     inset: {
     anchor: "top-left",
          x: 20,
          y: 20
     }
}
pull/326/head
Patrick Schreifels 11 years ago
parent
645a034e04
commit
f4b686db1e
1 changed files with 40 additions and 15 deletions
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  1. 55
      c3.js

55
c3.js
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@ -69,6 +69,7 @@
axisYLabel: 'c3-axis-y-label',
axisY2: 'c3-axis-y2',
axisY2Label: 'c3-axis-y2-label',
legendBackground: 'c3-legend-background',
legendItem: 'c3-legend-item',
legendItemEvent: 'c3-legend-item-event',
legendItemTile: 'c3-legend-item-tile',
@ -182,6 +183,9 @@
// legend
var __legend_show = getConfig(['legend', 'show'], true),
__legend_position = getConfig(['legend', 'position'], 'bottom'),
__legend_inset_anchor = getConfig(['legend', 'inset', 'anchor'], 'top-left'),
__legend_inset_x = getConfig(['legend', 'inset', 'x'], 0),
__legend_inset_y = getConfig(['legend', 'inset', 'y'], 0),
__legend_item_onclick = getConfig(['legend', 'item', 'onclick']),
__legend_item_onmouseover = getConfig(['legend', 'item', 'onmouseover']),
__legend_item_onmouseout = getConfig(['legend', 'item', 'onmouseout']),
@ -377,6 +381,9 @@
};
var isLegendRight = __legend_position === 'right';
var isLegendInset = __legend_position === 'inset';
var isLegendTop = __legend_inset_anchor === 'top-left' || __legend_inset_anchor === 'top-right';
var isLegendLeft = __legend_inset_anchor === 'top-left' || __legend_inset_anchor === 'bottom-left';
var legendStep = 0, legendItemWidth = 0, legendItemHeight = 0, legendOpacityForHidden = 0.15;
var currentMaxTickWidth = 0;
@ -445,7 +452,7 @@
// MEMO: each value should be int to avoid disabling antialiasing
function updateSizes() {
var legendHeight = getLegendHeight(), legendWidth = getLegendWidth(),
legendHeightForBottom = isLegendRight ? 0 : legendHeight,
legendHeightForBottom = isLegendRight || isLegendInset ? 0 : legendHeight,
hasArc = hasArcType(c3.data.targets),
xAxisHeight = __axis_rotated || hasArc ? 0 : getHorizontalAxisHeight('x'),
subchartHeight = __subchart_show && !hasArc ? (__subchart_size_height + xAxisHeight) : 0;
@ -482,11 +489,15 @@
};
}
// for legend
var insetLegendPosition = {
top: isLegendTop ? getCurrentPaddingTop() + __legend_inset_y + 5.5 : currentHeight - legendHeight - getCurrentPaddingBottom() - __legend_inset_y,
left: isLegendLeft ? getCurrentPaddingLeft() + __legend_inset_x + 0.5 : currentWidth - legendWidth - getCurrentPaddingRight() - __legend_inset_x + 0.5
};
margin3 = {
top: isLegendRight ? 0 : currentHeight - legendHeight,
top: isLegendRight ? 0 : isLegendInset ? insetLegendPosition.top : currentHeight - legendHeight,
right: NaN,
bottom: 0,
left: isLegendRight ? currentWidth - legendWidth : 0
left: isLegendRight ? currentWidth - legendWidth : isLegendInset ? insetLegendPosition.left : 0
};
width = currentWidth - margin.left - margin.right;
@ -570,7 +581,7 @@
function getHorizontalAxisHeight(axisId) {
if (axisId === 'x' && !__axis_x_show) { return 0; }
if (axisId === 'x' && __axis_x_height) { return __axis_x_height; }
if (axisId === 'y' && !__axis_y_show) { return __legend_show && !isLegendRight ? 10 : 1; }
if (axisId === 'y' && !__axis_y_show) { return __legend_show && !isLegendRight && !isLegendInset ? 10 : 1; }
if (axisId === 'y2' && !__axis_y2_show) { return rotated_padding_top; }
return (getAxisLabelPositionById(axisId).isInner ? 30 : 40) + (axisId === 'y2' ? -10 : 0);
}
@ -656,10 +667,10 @@
legendItemHeight = h;
}
function getLegendWidth() {
return __legend_show ? isLegendRight ? legendItemWidth * (legendStep + 1) : currentWidth : 0;
return __legend_show ? isLegendRight || isLegendInset ? legendItemWidth * (legendStep + 1) : currentWidth : 0;
}
function getLegendHeight() {
return __legend_show ? isLegendRight ? currentHeight : Math.max(20, legendItemHeight) * (legendStep + 1) : 0;
return __legend_show ? isLegendRight ? currentHeight : isLegendInset ? (c3.data.targets.length * Math.max(20, legendItemHeight)) + 20 : Math.max(20, legendItemHeight) * (legendStep + 1) : 0;
}
//-- Scales --//
@ -4530,8 +4541,8 @@
var box = getTextRect(textElement.textContent, CLASS.legendItem),
itemWidth = Math.ceil((box.width + paddingRight) / 10) * 10,
itemHeight = Math.ceil((box.height + paddingTop) / 10) * 10,
itemLength = isLegendRight ? itemHeight : itemWidth,
areaLength = isLegendRight ? getLegendHeight() : getLegendWidth(),
itemLength = isLegendRight || isLegendInset ? itemHeight : itemWidth,
areaLength = isLegendRight || isLegendInset ? getLegendHeight() : getLegendWidth(),
margin, maxLength;
// MEMO: care about condifion of step, totalLength
@ -4567,7 +4578,7 @@
if (!maxWidth || itemWidth >= maxWidth) { maxWidth = itemWidth; }
if (!maxHeight || itemHeight >= maxHeight) { maxHeight = itemHeight; }
maxLength = isLegendRight ? maxHeight : maxWidth;
maxLength = isLegendRight || isLegendInset ? maxHeight : maxWidth;
if (__legend_equally) {
Object.keys(widths).forEach(function (id) { widths[id] = maxWidth; });
@ -4589,6 +4600,9 @@
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]; };
@ -4630,21 +4644,32 @@
.text(function (id) { return isDefined(__data_names[id]) ? __data_names[id] : id; })
.each(function (id, i) { updatePositions(this, id, i === 0); })
.style("pointer-events", "none")
.attr('x', isLegendRight ? xForLegendText : -200)
.attr('y', isLegendRight ? -200 : yForLegendText);
.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 ? xForLegendRect : -200)
.attr('y', isLegendRight ? -200 : yForLegendRect);
.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 ? xForLegendText : -200)
.attr('y', isLegendRight ? -200 : yForLegend)
.attr('x', isLegendRight || isLegendInset ? xForLegendText : -200)
.attr('y', isLegendRight || isLegendInset ? -200 : yForLegend)
.attr('width', 10)
.attr('height', 10);
// Set background for inset legend
if (isLegendInset && maxWidth != 0) {
legend.insert('g', '.' + CLASS.legendItem)
.attr("class", CLASS.legendBackground).append('rect')
.style('opacity', 0.75)
.style('fill', 'white')
.style('stroke', 'lightgray')
.style('stroke-width', 1)
.attr('height', getLegendHeight()-10)
.attr('width', maxWidth);
}
texts = legend.selectAll('text')
.data(targetIds)

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