*/
var DygraphLayout = function(dygraph) {
this.dygraph_ = dygraph;
- this.datasets = [];
+ /**
+ * Array of points for each series.
+ *
+ * [series index][row index in series] = |Point| structure,
+ * where series index refers to visible series only, and the
+ * point index is for the reduced set of points for the current
+ * zoom region (including one point just outside the window).
+ * All points in the same row index share the same X value.
+ *
+ * @type {Array.<Array.<Dygraph.PointType>>}
+ */
+ this.points = [];
this.setNames = [];
this.annotations = [];
this.yAxes_ = null;
- this.points = null;
// TODO(danvk): it's odd that xTicks_ and yTicks_ are inputs, but xticks and
// yticks are outputs. Clean this up.
return this.dygraph_.attr_(name);
};
+/**
+ * Add points for a single series.
+ *
+ * @param {string} setname Name of the series.
+ * @param {Array.<Dygraph.PointType>} set_xy Points for the series.
+ */
DygraphLayout.prototype.addDataset = function(setname, set_xy) {
- this.datasets.push(set_xy);
+ this.points.push(set_xy);
this.setNames.push(setname);
};
+/**
+ * Returns the box which the chart should be drawn in. This is the canvas's
+ * box, less space needed for the axis and chart labels.
+ *
+ * @return {{x: number, y: number, w: number, h: number}}
+ */
DygraphLayout.prototype.getPlotArea = function() {
- return this.computePlotArea_();
+ return this.area_;
};
// Compute the box which the chart should be drawn in. This is the canvas's
-// box, less space needed for axis and chart labels.
-DygraphLayout.prototype.computePlotArea_ = function() {
+// box, less space needed for axis, chart labels, and other plug-ins.
+// NOTE: This should only be called by Dygraph.predraw_().
+DygraphLayout.prototype.computePlotArea = function() {
var area = {
// TODO(danvk): per-axis setting.
x: 0,
};
this.dygraph_.cascadeEvents_('layout', e);
- // Add space for range selector, if needed.
- if (this.attr_('showRangeSelector')) {
- area.h -= this.attr_('rangeSelectorHeight') + 4;
- }
-
- return area;
+ this.area_ = area;
};
DygraphLayout.prototype.setAnnotations = function(ann) {
var parse = this.attr_('xValueParser') || function(x) { return x; };
for (var i = 0; i < ann.length; i++) {
var a = {};
- if (!ann[i].xval && !ann[i].x) {
+ if (!ann[i].xval && ann[i].x === undefined) {
this.dygraph_.error("Annotations must have an 'x' property");
return;
}
this.yAxes_ = yAxes;
};
-DygraphLayout.prototype.setDateWindow = function(dateWindow) {
- this.dateWindow_ = dateWindow;
-};
-
DygraphLayout.prototype.evaluate = function() {
this._evaluateLimits();
this._evaluateLineCharts();
};
DygraphLayout.prototype._evaluateLimits = function() {
- this.minxval = this.maxxval = null;
- if (this.dateWindow_) {
- this.minxval = this.dateWindow_[0];
- this.maxxval = this.dateWindow_[1];
- } else {
- for (var setIdx = 0; setIdx < this.datasets.length; ++setIdx) {
- var series = this.datasets[setIdx];
- if (series.length > 1) {
- var x1 = series[0][0];
- if (!this.minxval || x1 < this.minxval) this.minxval = x1;
-
- var x2 = series[series.length - 1][0];
- if (!this.maxxval || x2 > this.maxxval) this.maxxval = x2;
- }
- }
- }
- this.xrange = this.maxxval - this.minxval;
- this.xscale = (this.xrange !== 0 ? 1/this.xrange : 1.0);
+ var xlimits = this.dygraph_.xAxisRange();
+ this.minxval = xlimits[0];
+ this.maxxval = xlimits[1];
+ var xrange = xlimits[1] - xlimits[0];
+ this.xscale = (xrange !== 0 ? 1 / xrange : 1.0);
for (var i = 0; i < this.yAxes_.length; i++) {
var axis = this.yAxes_[i];
}
};
-DygraphLayout._calcYNormal = function(axis, value) {
- if (axis.logscale) {
+DygraphLayout._calcYNormal = function(axis, value, logscale) {
+ if (logscale) {
return 1.0 - ((Dygraph.log10(value) - Dygraph.log10(axis.minyval)) * axis.ylogscale);
} else {
return 1.0 - ((value - axis.minyval) * axis.yscale);
DygraphLayout.prototype._evaluateLineCharts = function() {
var connectSeparated = this.attr_('connectSeparatedPoints');
+ var isStacked = this.attr_("stackedGraph");
- // series index -> point index in series -> |point| structure
- this.points = new Array(this.datasets.length);
-
- // TODO(bhs): these loops are a hot-spot for high-point-count charts. In fact,
- // on chrome+linux, they are 6 times more expensive than iterating through the
- // points and drawing the lines. The brunt of the cost comes from allocating
- // the |point| structures.
- for (var setIdx = 0; setIdx < this.datasets.length; setIdx++) {
- var dataset = this.datasets[setIdx];
+ for (var setIdx = 0; setIdx < this.points.length; setIdx++) {
+ var points = this.points[setIdx];
var setName = this.setNames[setIdx];
var axis = this.dygraph_.axisPropertiesForSeries(setName);
+ // TODO (konigsberg): use optionsForAxis instead.
+ var logscale = this.dygraph_.attributes_.getForSeries("logscale", setName);
- // Preallocating the size of points reduces reallocations, and therefore,
- // calls to collect garbage.
- var seriesPoints = new Array(dataset.length);
-
- for (var j = 0; j < dataset.length; j++) {
- var item = dataset[j];
- var xValue = DygraphLayout.parseFloat_(item[0]);
- var yValue = DygraphLayout.parseFloat_(item[1]);
+ for (var j = 0; j < points.length; j++) {
+ var point = points[j];
// Range from 0-1 where 0 represents left and 1 represents right.
- var xNormal = (xValue - this.minxval) * this.xscale;
+ point.x = (point.xval - this.minxval) * this.xscale;
// Range from 0-1 where 0 represents top and 1 represents bottom
- var yNormal = DygraphLayout._calcYNormal(axis, yValue);
-
- // TODO(danvk): drop the point in this case, don't null it.
- // The nulls create complexity in DygraphCanvasRenderer._drawSeries.
- if (connectSeparated && item[1] === null) {
- yValue = null;
+ var yval = point.yval;
+ if (isStacked) {
+ point.y_stacked = DygraphLayout._calcYNormal(
+ axis, point.yval_stacked, logscale);
+ if (yval !== null && !isNaN(yval)) {
+ yval = point.yval_stacked;
+ }
}
- seriesPoints[j] = {
- x: xNormal,
- y: yNormal,
- xval: xValue,
- yval: yValue,
- name: setName // TODO(danvk): is this really necessary?
- };
+ if (yval === null) {
+ yval = NaN;
+ if (!connectSeparated) {
+ point.yval = NaN;
+ }
+ }
+ point.y = DygraphLayout._calcYNormal(axis, yval, logscale);
}
- this.points[setIdx] = seriesPoints;
+ this.dygraph_.dataHandler_.onLineEvaluated(points, axis, logscale);
}
};
}
};
-
-/**
- * Behaves the same way as PlotKit.Layout, but also copies the errors
- * @private
- */
-DygraphLayout.prototype.evaluateWithError = function() {
- this.evaluate();
- if (!(this.attr_('errorBars') || this.attr_('customBars'))) return;
-
- // Copy over the error terms
- var i = 0; // index in this.points
- for (var setIdx = 0; setIdx < this.datasets.length; ++setIdx) {
- var points = this.points[setIdx];
- var j = 0;
- var dataset = this.datasets[setIdx];
- var setName = this.setNames[setIdx];
- var axis = this.dygraph_.axisPropertiesForSeries(setName);
- for (j = 0; j < dataset.length; j++, i++) {
- var item = dataset[j];
- var xv = DygraphLayout.parseFloat_(item[0]);
- var yv = DygraphLayout.parseFloat_(item[1]);
-
- if (xv == points[j].xval &&
- yv == points[j].yval) {
- var errorMinus = DygraphLayout.parseFloat_(item[2]);
- var errorPlus = DygraphLayout.parseFloat_(item[3]);
-
- var yv_minus = yv - errorMinus;
- var yv_plus = yv + errorPlus;
- points[j].y_top = DygraphLayout._calcYNormal(axis, yv_minus);
- points[j].y_bottom = DygraphLayout._calcYNormal(axis, yv_plus);
- }
- }
- }
-};
-
DygraphLayout.prototype._evaluateAnnotations = function() {
// Add the annotations to the point to which they belong.
// Make a map from (setName, xval) to annotation for quick lookups.
* Convenience function to remove all the data sets from a graph
*/
DygraphLayout.prototype.removeAllDatasets = function() {
- delete this.datasets;
+ delete this.points;
delete this.setNames;
delete this.setPointsLengths;
delete this.setPointsOffsets;
- this.datasets = [];
+ this.points = [];
this.setNames = [];
this.setPointsLengths = [];
this.setPointsOffsets = [];
};
-
-/**
- * Return a copy of the point at the indicated index, with its yval unstacked.
- * @param int index of point in layout_.points
- */
-DygraphLayout.prototype.unstackPointAtIndex = function(setIdx, row) {
- var point = this.points[setIdx][row];
- // If the point is missing, no unstacking is necessary
- if (!point.yval) {
- return point;
- }
-
- // Clone the point since we modify it
- var unstackedPoint = {};
- for (var pt in point) {
- unstackedPoint[pt] = point[pt];
- }
-
- if (!this.attr_("stackedGraph")) {
- return unstackedPoint;
- }
-
- // The unstacked yval is equal to the current yval minus the yval of the
- // next point at the same xval.
- var points = this.points[setIdx];
- for (var i = row + 1; i < points.length; i++) {
- if ((points[i].xval == point.xval) && points[i].yval) {
- unstackedPoint.yval -= points[i].yval;
- break;
- }
- }
-
- return unstackedPoint;
-};
projects / dygraphs.git / blobdiff