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Mini Shell
Mini Shell
'use strict';
var DatasetController = require('../core/core.datasetController');
var defaults = require('../core/core.defaults');
var elements = require('../elements/index');
var helpers = require('../helpers/index');
var valueOrDefault = helpers.valueOrDefault;
var resolve = helpers.options.resolve;
var isPointInArea = helpers.canvas._isPointInArea;
defaults._set('line', {
showLines: true,
spanGaps: false,
hover: {
mode: 'label'
},
scales: {
xAxes: [{
type: 'category',
id: 'x-axis-0'
}],
yAxes: [{
type: 'linear',
id: 'y-axis-0'
}]
}
});
function scaleClip(scale, halfBorderWidth) {
var tickOpts = scale && scale.options.ticks || {};
var reverse = tickOpts.reverse;
var min = tickOpts.min === undefined ? halfBorderWidth : 0;
var max = tickOpts.max === undefined ? halfBorderWidth : 0;
return {
start: reverse ? max : min,
end: reverse ? min : max
};
}
function defaultClip(xScale, yScale, borderWidth) {
var halfBorderWidth = borderWidth / 2;
var x = scaleClip(xScale, halfBorderWidth);
var y = scaleClip(yScale, halfBorderWidth);
return {
top: y.end,
right: x.end,
bottom: y.start,
left: x.start
};
}
function toClip(value) {
var t, r, b, l;
if (helpers.isObject(value)) {
t = value.top;
r = value.right;
b = value.bottom;
l = value.left;
} else {
t = r = b = l = value;
}
return {
top: t,
right: r,
bottom: b,
left: l
};
}
module.exports = DatasetController.extend({
datasetElementType: elements.Line,
dataElementType: elements.Point,
/**
* @private
*/
_datasetElementOptions: [
'backgroundColor',
'borderCapStyle',
'borderColor',
'borderDash',
'borderDashOffset',
'borderJoinStyle',
'borderWidth',
'cubicInterpolationMode',
'fill'
],
/**
* @private
*/
_dataElementOptions: {
backgroundColor: 'pointBackgroundColor',
borderColor: 'pointBorderColor',
borderWidth: 'pointBorderWidth',
hitRadius: 'pointHitRadius',
hoverBackgroundColor: 'pointHoverBackgroundColor',
hoverBorderColor: 'pointHoverBorderColor',
hoverBorderWidth: 'pointHoverBorderWidth',
hoverRadius: 'pointHoverRadius',
pointStyle: 'pointStyle',
radius: 'pointRadius',
rotation: 'pointRotation'
},
update: function(reset) {
var me = this;
var meta = me.getMeta();
var line = meta.dataset;
var points = meta.data || [];
var options = me.chart.options;
var config = me._config;
var showLine = me._showLine = valueOrDefault(config.showLine, options.showLines);
var i, ilen;
me._xScale = me.getScaleForId(meta.xAxisID);
me._yScale = me.getScaleForId(meta.yAxisID);
// Update Line
if (showLine) {
// Compatibility: If the properties are defined with only the old name, use those values
if (config.tension !== undefined && config.lineTension === undefined) {
config.lineTension = config.tension;
}
// Utility
line._scale = me._yScale;
line._datasetIndex = me.index;
// Data
line._children = points;
// Model
line._model = me._resolveDatasetElementOptions(line);
line.pivot();
}
// Update Points
for (i = 0, ilen = points.length; i < ilen; ++i) {
me.updateElement(points[i], i, reset);
}
if (showLine && line._model.tension !== 0) {
me.updateBezierControlPoints();
}
// Now pivot the point for animation
for (i = 0, ilen = points.length; i < ilen; ++i) {
points[i].pivot();
}
},
updateElement: function(point, index, reset) {
var me = this;
var meta = me.getMeta();
var custom = point.custom || {};
var dataset = me.getDataset();
var datasetIndex = me.index;
var value = dataset.data[index];
var xScale = me._xScale;
var yScale = me._yScale;
var lineModel = meta.dataset._model;
var x, y;
var options = me._resolveDataElementOptions(point, index);
x = xScale.getPixelForValue(typeof value === 'object' ? value : NaN, index, datasetIndex);
y = reset ? yScale.getBasePixel() : me.calculatePointY(value, index, datasetIndex);
// Utility
point._xScale = xScale;
point._yScale = yScale;
point._options = options;
point._datasetIndex = datasetIndex;
point._index = index;
// Desired view properties
point._model = {
x: x,
y: y,
skip: custom.skip || isNaN(x) || isNaN(y),
// Appearance
radius: options.radius,
pointStyle: options.pointStyle,
rotation: options.rotation,
backgroundColor: options.backgroundColor,
borderColor: options.borderColor,
borderWidth: options.borderWidth,
tension: valueOrDefault(custom.tension, lineModel ? lineModel.tension : 0),
steppedLine: lineModel ? lineModel.steppedLine : false,
// Tooltip
hitRadius: options.hitRadius
};
},
/**
* @private
*/
_resolveDatasetElementOptions: function(element) {
var me = this;
var config = me._config;
var custom = element.custom || {};
var options = me.chart.options;
var lineOptions = options.elements.line;
var values = DatasetController.prototype._resolveDatasetElementOptions.apply(me, arguments);
// The default behavior of lines is to break at null values, according
// to https://github.com/chartjs/Chart.js/issues/2435#issuecomment-216718158
// This option gives lines the ability to span gaps
values.spanGaps = valueOrDefault(config.spanGaps, options.spanGaps);
values.tension = valueOrDefault(config.lineTension, lineOptions.tension);
values.steppedLine = resolve([custom.steppedLine, config.steppedLine, lineOptions.stepped]);
values.clip = toClip(valueOrDefault(config.clip, defaultClip(me._xScale, me._yScale, values.borderWidth)));
return values;
},
calculatePointY: function(value, index, datasetIndex) {
var me = this;
var chart = me.chart;
var yScale = me._yScale;
var sumPos = 0;
var sumNeg = 0;
var i, ds, dsMeta, stackedRightValue, rightValue, metasets, ilen;
if (yScale.options.stacked) {
rightValue = +yScale.getRightValue(value);
metasets = chart._getSortedVisibleDatasetMetas();
ilen = metasets.length;
for (i = 0; i < ilen; ++i) {
dsMeta = metasets[i];
if (dsMeta.index === datasetIndex) {
break;
}
ds = chart.data.datasets[dsMeta.index];
if (dsMeta.type === 'line' && dsMeta.yAxisID === yScale.id) {
stackedRightValue = +yScale.getRightValue(ds.data[index]);
if (stackedRightValue < 0) {
sumNeg += stackedRightValue || 0;
} else {
sumPos += stackedRightValue || 0;
}
}
}
if (rightValue < 0) {
return yScale.getPixelForValue(sumNeg + rightValue);
}
return yScale.getPixelForValue(sumPos + rightValue);
}
return yScale.getPixelForValue(value);
},
updateBezierControlPoints: function() {
var me = this;
var chart = me.chart;
var meta = me.getMeta();
var lineModel = meta.dataset._model;
var area = chart.chartArea;
var points = meta.data || [];
var i, ilen, model, controlPoints;
// Only consider points that are drawn in case the spanGaps option is used
if (lineModel.spanGaps) {
points = points.filter(function(pt) {
return !pt._model.skip;
});
}
function capControlPoint(pt, min, max) {
return Math.max(Math.min(pt, max), min);
}
if (lineModel.cubicInterpolationMode === 'monotone') {
helpers.splineCurveMonotone(points);
} else {
for (i = 0, ilen = points.length; i < ilen; ++i) {
model = points[i]._model;
controlPoints = helpers.splineCurve(
helpers.previousItem(points, i)._model,
model,
helpers.nextItem(points, i)._model,
lineModel.tension
);
model.controlPointPreviousX = controlPoints.previous.x;
model.controlPointPreviousY = controlPoints.previous.y;
model.controlPointNextX = controlPoints.next.x;
model.controlPointNextY = controlPoints.next.y;
}
}
if (chart.options.elements.line.capBezierPoints) {
for (i = 0, ilen = points.length; i < ilen; ++i) {
model = points[i]._model;
if (isPointInArea(model, area)) {
if (i > 0 && isPointInArea(points[i - 1]._model, area)) {
model.controlPointPreviousX = capControlPoint(model.controlPointPreviousX, area.left, area.right);
model.controlPointPreviousY = capControlPoint(model.controlPointPreviousY, area.top, area.bottom);
}
if (i < points.length - 1 && isPointInArea(points[i + 1]._model, area)) {
model.controlPointNextX = capControlPoint(model.controlPointNextX, area.left, area.right);
model.controlPointNextY = capControlPoint(model.controlPointNextY, area.top, area.bottom);
}
}
}
}
},
draw: function() {
var me = this;
var chart = me.chart;
var meta = me.getMeta();
var points = meta.data || [];
var area = chart.chartArea;
var canvas = chart.canvas;
var i = 0;
var ilen = points.length;
var clip;
if (me._showLine) {
clip = meta.dataset._model.clip;
helpers.canvas.clipArea(chart.ctx, {
left: clip.left === false ? 0 : area.left - clip.left,
right: clip.right === false ? canvas.width : area.right + clip.right,
top: clip.top === false ? 0 : area.top - clip.top,
bottom: clip.bottom === false ? canvas.height : area.bottom + clip.bottom
});
meta.dataset.draw();
helpers.canvas.unclipArea(chart.ctx);
}
// Draw the points
for (; i < ilen; ++i) {
points[i].draw(area);
}
},
/**
* @protected
*/
setHoverStyle: function(point) {
var model = point._model;
var options = point._options;
var getHoverColor = helpers.getHoverColor;
point.$previousStyle = {
backgroundColor: model.backgroundColor,
borderColor: model.borderColor,
borderWidth: model.borderWidth,
radius: model.radius
};
model.backgroundColor = valueOrDefault(options.hoverBackgroundColor, getHoverColor(options.backgroundColor));
model.borderColor = valueOrDefault(options.hoverBorderColor, getHoverColor(options.borderColor));
model.borderWidth = valueOrDefault(options.hoverBorderWidth, options.borderWidth);
model.radius = valueOrDefault(options.hoverRadius, options.radius);
},
});
Zerion Mini Shell 1.0