/**
* Bar charts
*/
$.fn.sparkline.bar = bar = createClass($.fn.sparkline._base, barHighlightMixin, {
type: 'bar',
init: function (el, values, options, width, height) {
var barWidth = parseInt(options.get('barWidth'), 10),
barSpacing = parseInt(options.get('barSpacing'), 10),
chartRangeMin = options.get('chartRangeMin'),
chartRangeMax = options.get('chartRangeMax'),
chartRangeClip = options.get('chartRangeClip'),
stackMin = Infinity,
stackMax = -Infinity,
isStackString, groupMin, groupMax, stackRanges,
numValues, i, vlen, range, zeroAxis, xaxisOffset, min, max, clipMin, clipMax,
stacked, vlist, j, slen, svals, val, yoffset, yMaxCalc, canvasHeightEf;
bar._super.init.call(this, el, values, options, width, height);
// scan values to determine whether to stack bars
for (i = 0, vlen = values.length; i < vlen; i++) {
val = values[i];
isStackString = typeof(val) === 'string' && val.indexOf(':') > -1;
if (isStackString || $.isArray(val)) {
stacked = true;
if (isStackString) {
val = values[i] = normalizeValues(val.split(':'));
}
val = remove(val, null); // min/max will treat null as zero
groupMin = Math.min.apply(Math, val);
groupMax = Math.max.apply(Math, val);
if (groupMin < stackMin) {
stackMin = groupMin;
}
if (groupMax > stackMax) {
stackMax = groupMax;
}
}
}
this.stacked = stacked;
this.regionShapes = {};
this.barWidth = barWidth;
this.barSpacing = barSpacing;
this.totalBarWidth = barWidth + barSpacing;
this.width = width = (values.length * barWidth) + ((values.length - 1) * barSpacing);
this.initTarget();
if (chartRangeClip) {
clipMin = chartRangeMin === undefined ? -Infinity : chartRangeMin;
clipMax = chartRangeMax === undefined ? Infinity : chartRangeMax;
}
numValues = [];
stackRanges = stacked ? [] : numValues;
var stackTotals = [];
var stackRangesNeg = [];
for (i = 0, vlen = values.length; i < vlen; i++) {
if (stacked) {
vlist = values[i];
values[i] = svals = [];
stackTotals[i] = 0;
stackRanges[i] = stackRangesNeg[i] = 0;
for (j = 0, slen = vlist.length; j < slen; j++) {
val = svals[j] = chartRangeClip ? clipval(vlist[j], clipMin, clipMax) : vlist[j];
if (val !== null) {
if (val > 0) {
stackTotals[i] += val;
}
if (stackMin < 0 && stackMax > 0) {
if (val < 0) {
stackRangesNeg[i] += Math.abs(val);
} else {
stackRanges[i] += val;
}
} else {
stackRanges[i] += Math.abs(val - (val < 0 ? stackMax : stackMin));
}
numValues.push(val);
}
}
} else {
val = chartRangeClip ? clipval(values[i], clipMin, clipMax) : values[i];
val = values[i] = normalizeValue(val);
if (val !== null) {
numValues.push(val);
}
}
}
this.max = max = Math.max.apply(Math, numValues);
this.min = min = Math.min.apply(Math, numValues);
this.stackMax = stackMax = stacked ? Math.max.apply(Math, stackTotals) : max;
this.stackMin = stackMin = stacked ? Math.min.apply(Math, numValues) : min;
if (options.get('chartRangeMin') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMin') < min)) {
min = options.get('chartRangeMin');
}
if (options.get('chartRangeMax') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMax') > max)) {
max = options.get('chartRangeMax');
}
this.zeroAxis = zeroAxis = options.get('zeroAxis', true);
if (min <= 0 && max >= 0 && zeroAxis) {
xaxisOffset = 0;
} else if (zeroAxis == false) {
xaxisOffset = min;
} else if (min > 0) {
xaxisOffset = min;
} else {
xaxisOffset = max;
}
this.xaxisOffset = xaxisOffset;
range = stacked ? (Math.max.apply(Math, stackRanges) + Math.max.apply(Math, stackRangesNeg)) : max - min;
// as we plot zero/min values a single pixel line, we add a pixel to all other
// values - Reduce the effective canvas size to suit
this.canvasHeightEf = (zeroAxis && min < 0) ? this.canvasHeight - 2 : this.canvasHeight - 1;
if (min < xaxisOffset) {
yMaxCalc = (stacked && max >= 0) ? stackMax : max;
yoffset = (yMaxCalc - xaxisOffset) / range * this.canvasHeight;
if (yoffset !== Math.ceil(yoffset)) {
this.canvasHeightEf -= 2;
yoffset = Math.ceil(yoffset);
}
} else {
yoffset = this.canvasHeight;
}
this.yoffset = yoffset;
if ($.isArray(options.get('colorMap'))) {
this.colorMapByIndex = options.get('colorMap');
this.colorMapByValue = null;
} else {
this.colorMapByIndex = null;
this.colorMapByValue = options.get('colorMap');
if (this.colorMapByValue && this.colorMapByValue.get === undefined) {
this.colorMapByValue = new RangeMap(this.colorMapByValue);
}
}
this.range = range;
},
getRegion: function (el, x, y) {
var result = Math.floor(x / this.totalBarWidth);
return (result < 0 || result >= this.values.length) ? undefined : result;
},
getCurrentRegionFields: function () {
var currentRegion = this.currentRegion,
values = ensureArray(this.values[currentRegion]),
result = [],
value, i;
for (i = values.length; i--;) {
value = values[i];
result.push({
isNull: value === null,
value: value,
color: this.calcColor(i, value, currentRegion),
offset: currentRegion
});
}
return result;
},
calcColor: function (stacknum, value, valuenum) {
var colorMapByIndex = this.colorMapByIndex,
colorMapByValue = this.colorMapByValue,
options = this.options,
color, newColor;
if (this.stacked) {
color = options.get('stackedBarColor');
} else {
color = (value < 0) ? options.get('negBarColor') : options.get('barColor');
}
if (value === 0 && options.get('zeroColor') !== undefined) {
color = options.get('zeroColor');
}
if (colorMapByValue && (newColor = colorMapByValue.get(value))) {
color = newColor;
} else if (colorMapByIndex && colorMapByIndex.length > valuenum) {
color = colorMapByIndex[valuenum];
}
return $.isArray(color) ? color[stacknum % color.length] : color;
},
/**
* Render bar(s) for a region
*/
renderRegion: function (valuenum, highlight) {
var vals = this.values[valuenum],
options = this.options,
xaxisOffset = this.xaxisOffset,
result = [],
range = this.range,
stacked = this.stacked,
target = this.target,
x = valuenum * this.totalBarWidth,
canvasHeightEf = this.canvasHeightEf,
yoffset = this.yoffset,
y, height, color, isNull, yoffsetNeg, i, valcount, val, minPlotted, allMin;
vals = $.isArray(vals) ? vals : [vals];
valcount = vals.length;
val = vals[0];
isNull = all(null, vals);
allMin = all(xaxisOffset, vals, true);
if (isNull) {
if (options.get('nullColor')) {
color = highlight ? options.get('nullColor') : this.calcHighlightColor(options.get('nullColor'), options);
y = (yoffset > 0) ? yoffset - 1 : yoffset;
return target.drawRect(x, y, this.barWidth - 1, 0, color, color);
} else {
return undefined;
}
}
yoffsetNeg = yoffset;
for (i = 0; i < valcount; i++) {
val = vals[i];
if (stacked && val === xaxisOffset) {
if (!allMin || minPlotted) {
continue;
}
minPlotted = true;
}
if (range > 0) {
height = Math.floor(canvasHeightEf * ((Math.abs(val - xaxisOffset) / range))) + 1;
} else {
height = 1;
}
if (val < xaxisOffset || (val === xaxisOffset && yoffset === 0)) {
y = yoffsetNeg;
yoffsetNeg += height;
} else {
y = yoffset - height;
yoffset -= height;
}
color = this.calcColor(i, val, valuenum);
if (highlight) {
color = this.calcHighlightColor(color, options);
}
result.push(target.drawRect(x, y, this.barWidth - 1, height - 1, color, color));
}
if (result.length === 1) {
return result[0];
}
return result;
}
});
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