--- /dev/null
+/**
+ * @license
+ * Copyright 2011 Paul Felix (paul.eric.felix@gmail.com)
+ * MIT-licensed (http://opensource.org/licenses/MIT)
+ */
+/*global Dygraph:false,TouchEvent:false */
+
+/**
+ * @fileoverview This file contains the RangeSelector plugin used to provide
+ * a timeline range selector widget for dygraphs.
+ */
+
+Dygraph.Plugins.RangeSelector = (function() {
+
+/*global Dygraph:false */
+"use strict";
+
+var rangeSelector = function() {
+ this.isIE_ = /MSIE/.test(navigator.userAgent) && !window.opera;
+ this.hasTouchInterface_ = typeof(TouchEvent) != 'undefined';
+ this.isMobileDevice_ = /mobile|android/gi.test(navigator.appVersion);
+ this.interfaceCreated_ = false;
+};
+
+rangeSelector.prototype.toString = function() {
+ return "RangeSelector Plugin";
+};
+
+rangeSelector.prototype.activate = function(dygraph) {
+ this.dygraph_ = dygraph;
+ if (this.getOption_('showRangeSelector')) {
+ this.createInterface_();
+ }
+ return {
+ layout: this.reserveSpace_,
+ predraw: this.renderStaticLayer_,
+ didDrawChart: this.renderInteractiveLayer_
+ };
+};
+
+rangeSelector.prototype.destroy = function() {
+ this.bgcanvas_ = null;
+ this.fgcanvas_ = null;
+ this.leftZoomHandle_ = null;
+ this.rightZoomHandle_ = null;
+};
+
+//------------------------------------------------------------------
+// Private methods
+//------------------------------------------------------------------
+
+rangeSelector.prototype.getOption_ = function(name, opt_series) {
+ return this.dygraph_.getOption(name, opt_series);
+};
+
+rangeSelector.prototype.setDefaultOption_ = function(name, value) {
+ this.dygraph_.attrs_[name] = value;
+};
+
+/**
+ * @private
+ * Creates the range selector elements and adds them to the graph.
+ */
+rangeSelector.prototype.createInterface_ = function() {
+ this.createCanvases_();
+ this.createZoomHandles_();
+ this.initInteraction_();
+
+ // Range selector and animatedZooms have a bad interaction. See issue 359.
+ if (this.getOption_('animatedZooms')) {
+ console.warn('Animated zooms and range selector are not compatible; disabling animatedZooms.');
+ this.dygraph_.updateOptions({animatedZooms: false}, true);
+ }
+
+ this.interfaceCreated_ = true;
+ this.addToGraph_();
+};
+
+/**
+ * @private
+ * Adds the range selector to the graph.
+ */
+rangeSelector.prototype.addToGraph_ = function() {
+ var graphDiv = this.graphDiv_ = this.dygraph_.graphDiv;
+ graphDiv.appendChild(this.bgcanvas_);
+ graphDiv.appendChild(this.fgcanvas_);
+ graphDiv.appendChild(this.leftZoomHandle_);
+ graphDiv.appendChild(this.rightZoomHandle_);
+};
+
+/**
+ * @private
+ * Removes the range selector from the graph.
+ */
+rangeSelector.prototype.removeFromGraph_ = function() {
+ var graphDiv = this.graphDiv_;
+ graphDiv.removeChild(this.bgcanvas_);
+ graphDiv.removeChild(this.fgcanvas_);
+ graphDiv.removeChild(this.leftZoomHandle_);
+ graphDiv.removeChild(this.rightZoomHandle_);
+ this.graphDiv_ = null;
+};
+
+/**
+ * @private
+ * Called by Layout to allow range selector to reserve its space.
+ */
+rangeSelector.prototype.reserveSpace_ = function(e) {
+ if (this.getOption_('showRangeSelector')) {
+ e.reserveSpaceBottom(this.getOption_('rangeSelectorHeight') + 4);
+ }
+};
+
+/**
+ * @private
+ * Renders the static portion of the range selector at the predraw stage.
+ */
+rangeSelector.prototype.renderStaticLayer_ = function() {
+ if (!this.updateVisibility_()) {
+ return;
+ }
+ this.resize_();
+ this.drawStaticLayer_();
+};
+
+/**
+ * @private
+ * Renders the interactive portion of the range selector after the chart has been drawn.
+ */
+rangeSelector.prototype.renderInteractiveLayer_ = function() {
+ if (!this.updateVisibility_() || this.isChangingRange_) {
+ return;
+ }
+ this.placeZoomHandles_();
+ this.drawInteractiveLayer_();
+};
+
+/**
+ * @private
+ * Check to see if the range selector is enabled/disabled and update visibility accordingly.
+ */
+rangeSelector.prototype.updateVisibility_ = function() {
+ var enabled = this.getOption_('showRangeSelector');
+ if (enabled) {
+ if (!this.interfaceCreated_) {
+ this.createInterface_();
+ } else if (!this.graphDiv_ || !this.graphDiv_.parentNode) {
+ this.addToGraph_();
+ }
+ } else if (this.graphDiv_) {
+ this.removeFromGraph_();
+ var dygraph = this.dygraph_;
+ setTimeout(function() { dygraph.width_ = 0; dygraph.resize(); }, 1);
+ }
+ return enabled;
+};
+
+/**
+ * @private
+ * Resizes the range selector.
+ */
+rangeSelector.prototype.resize_ = function() {
+ function setElementRect(canvas, context, rect) {
+ var canvasScale = Dygraph.getContextPixelRatio(context);
+
+ canvas.style.top = rect.y + 'px';
+ canvas.style.left = rect.x + 'px';
+ canvas.width = rect.w * canvasScale;
+ canvas.height = rect.h * canvasScale;
+ canvas.style.width = rect.w + 'px';
+ canvas.style.height = rect.h + 'px';
+
+ if(canvasScale != 1) {
+ context.scale(canvasScale, canvasScale);
+ }
+ }
+
+ var plotArea = this.dygraph_.layout_.getPlotArea();
+
+ var xAxisLabelHeight = 0;
+ if (this.dygraph_.getOptionForAxis('drawAxis', 'x')) {
+ xAxisLabelHeight = this.getOption_('xAxisHeight') || (this.getOption_('axisLabelFontSize') + 2 * this.getOption_('axisTickSize'));
+ }
+ this.canvasRect_ = {
+ x: plotArea.x,
+ y: plotArea.y + plotArea.h + xAxisLabelHeight + 4,
+ w: plotArea.w,
+ h: this.getOption_('rangeSelectorHeight')
+ };
+
+ setElementRect(this.bgcanvas_, this.bgcanvas_ctx_, this.canvasRect_);
+ setElementRect(this.fgcanvas_, this.fgcanvas_ctx_, this.canvasRect_);
+};
+
+/**
+ * @private
+ * Creates the background and foreground canvases.
+ */
+rangeSelector.prototype.createCanvases_ = function() {
+ this.bgcanvas_ = Dygraph.createCanvas();
+ this.bgcanvas_.className = 'dygraph-rangesel-bgcanvas';
+ this.bgcanvas_.style.position = 'absolute';
+ this.bgcanvas_.style.zIndex = 9;
+ this.bgcanvas_ctx_ = Dygraph.getContext(this.bgcanvas_);
+
+ this.fgcanvas_ = Dygraph.createCanvas();
+ this.fgcanvas_.className = 'dygraph-rangesel-fgcanvas';
+ this.fgcanvas_.style.position = 'absolute';
+ this.fgcanvas_.style.zIndex = 9;
+ this.fgcanvas_.style.cursor = 'default';
+ this.fgcanvas_ctx_ = Dygraph.getContext(this.fgcanvas_);
+};
+
+/**
+ * @private
+ * Creates the zoom handle elements.
+ */
+rangeSelector.prototype.createZoomHandles_ = function() {
+ var img = new Image();
+ img.className = 'dygraph-rangesel-zoomhandle';
+ img.style.position = 'absolute';
+ img.style.zIndex = 10;
+ img.style.visibility = 'hidden'; // Initially hidden so they don't show up in the wrong place.
+ img.style.cursor = 'col-resize';
+//TODO: change image to more options
+ if (/MSIE 7/.test(navigator.userAgent)) { // IE7 doesn't support embedded src data.
+ img.width = 7;
+ img.height = 14;
+ img.style.backgroundColor = 'white';
+ img.style.border = '1px solid #333333'; // Just show box in IE7.
+ } else {
+ img.width = 9;
+ img.height = 16;
+ img.src = 'data:image/png;base64,' +
+'iVBORw0KGgoAAAANSUhEUgAAAAkAAAAQCAYAAADESFVDAAAAAXNSR0IArs4c6QAAAAZiS0dEANAA' +
+'zwDP4Z7KegAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sHGw0cMqdt1UwAAAAZdEVYdENv' +
+'bW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAaElEQVQoz+3SsRFAQBCF4Z9WJM8KCDVwownl' +
+'6YXsTmCUsyKGkZzcl7zkz3YLkypgAnreFmDEpHkIwVOMfpdi9CEEN2nGpFdwD03yEqDtOgCaun7s' +
+'qSTDH32I1pQA2Pb9sZecAxc5r3IAb21d6878xsAAAAAASUVORK5CYII=';
+ }
+
+ if (this.isMobileDevice_) {
+ img.width *= 2;
+ img.height *= 2;
+ }
+
+ this.leftZoomHandle_ = img;
+ this.rightZoomHandle_ = img.cloneNode(false);
+};
+
+/**
+ * @private
+ * Sets up the interaction for the range selector.
+ */
+rangeSelector.prototype.initInteraction_ = function() {
+ var self = this;
+ var topElem = document;
+ var clientXLast = 0;
+ var handle = null;
+ var isZooming = false;
+ var isPanning = false;
+ var dynamic = !this.isMobileDevice_;
+
+ // We cover iframes during mouse interactions. See comments in
+ // dygraph-utils.js for more info on why this is a good idea.
+ var tarp = new Dygraph.IFrameTarp();
+
+ // functions, defined below. Defining them this way (rather than with
+ // "function foo() {...}" makes JSHint happy.
+ var toXDataWindow, onZoomStart, onZoom, onZoomEnd, doZoom, isMouseInPanZone,
+ onPanStart, onPan, onPanEnd, doPan, onCanvasHover;
+
+ // Touch event functions
+ var onZoomHandleTouchEvent, onCanvasTouchEvent, addTouchEvents;
+
+ toXDataWindow = function(zoomHandleStatus) {
+ var xDataLimits = self.dygraph_.xAxisExtremes();
+ var fact = (xDataLimits[1] - xDataLimits[0])/self.canvasRect_.w;
+ var xDataMin = xDataLimits[0] + (zoomHandleStatus.leftHandlePos - self.canvasRect_.x)*fact;
+ var xDataMax = xDataLimits[0] + (zoomHandleStatus.rightHandlePos - self.canvasRect_.x)*fact;
+ return [xDataMin, xDataMax];
+ };
+
+ onZoomStart = function(e) {
+ Dygraph.cancelEvent(e);
+ isZooming = true;
+ clientXLast = e.clientX;
+ handle = e.target ? e.target : e.srcElement;
+ if (e.type === 'mousedown' || e.type === 'dragstart') {
+ // These events are removed manually.
+ Dygraph.addEvent(topElem, 'mousemove', onZoom);
+ Dygraph.addEvent(topElem, 'mouseup', onZoomEnd);
+ }
+ self.fgcanvas_.style.cursor = 'col-resize';
+ tarp.cover();
+ return true;
+ };
+
+ onZoom = function(e) {
+ if (!isZooming) {
+ return false;
+ }
+ Dygraph.cancelEvent(e);
+
+ var delX = e.clientX - clientXLast;
+ if (Math.abs(delX) < 4) {
+ return true;
+ }
+ clientXLast = e.clientX;
+
+ // Move handle.
+ var zoomHandleStatus = self.getZoomHandleStatus_();
+ var newPos;
+ if (handle == self.leftZoomHandle_) {
+ newPos = zoomHandleStatus.leftHandlePos + delX;
+ newPos = Math.min(newPos, zoomHandleStatus.rightHandlePos - handle.width - 3);
+ newPos = Math.max(newPos, self.canvasRect_.x);
+ } else {
+ newPos = zoomHandleStatus.rightHandlePos + delX;
+ newPos = Math.min(newPos, self.canvasRect_.x + self.canvasRect_.w);
+ newPos = Math.max(newPos, zoomHandleStatus.leftHandlePos + handle.width + 3);
+ }
+ var halfHandleWidth = handle.width/2;
+ handle.style.left = (newPos - halfHandleWidth) + 'px';
+ self.drawInteractiveLayer_();
+
+ // Zoom on the fly.
+ if (dynamic) {
+ doZoom();
+ }
+ return true;
+ };
+
+ onZoomEnd = function(e) {
+ if (!isZooming) {
+ return false;
+ }
+ isZooming = false;
+ tarp.uncover();
+ Dygraph.removeEvent(topElem, 'mousemove', onZoom);
+ Dygraph.removeEvent(topElem, 'mouseup', onZoomEnd);
+ self.fgcanvas_.style.cursor = 'default';
+
+ // If on a slower device, zoom now.
+ if (!dynamic) {
+ doZoom();
+ }
+ return true;
+ };
+
+ doZoom = function() {
+ try {
+ var zoomHandleStatus = self.getZoomHandleStatus_();
+ self.isChangingRange_ = true;
+ if (!zoomHandleStatus.isZoomed) {
+ self.dygraph_.resetZoom();
+ } else {
+ var xDataWindow = toXDataWindow(zoomHandleStatus);
+ self.dygraph_.doZoomXDates_(xDataWindow[0], xDataWindow[1]);
+ }
+ } finally {
+ self.isChangingRange_ = false;
+ }
+ };
+
+ isMouseInPanZone = function(e) {
+ var rect = self.leftZoomHandle_.getBoundingClientRect();
+ var leftHandleClientX = rect.left + rect.width/2;
+ rect = self.rightZoomHandle_.getBoundingClientRect();
+ var rightHandleClientX = rect.left + rect.width/2;
+ return (e.clientX > leftHandleClientX && e.clientX < rightHandleClientX);
+ };
+
+ onPanStart = function(e) {
+ if (!isPanning && isMouseInPanZone(e) && self.getZoomHandleStatus_().isZoomed) {
+ Dygraph.cancelEvent(e);
+ isPanning = true;
+ clientXLast = e.clientX;
+ if (e.type === 'mousedown') {
+ // These events are removed manually.
+ Dygraph.addEvent(topElem, 'mousemove', onPan);
+ Dygraph.addEvent(topElem, 'mouseup', onPanEnd);
+ }
+ return true;
+ }
+ return false;
+ };
+
+ onPan = function(e) {
+ if (!isPanning) {
+ return false;
+ }
+ Dygraph.cancelEvent(e);
+
+ var delX = e.clientX - clientXLast;
+ if (Math.abs(delX) < 4) {
+ return true;
+ }
+ clientXLast = e.clientX;
+
+ // Move range view
+ var zoomHandleStatus = self.getZoomHandleStatus_();
+ var leftHandlePos = zoomHandleStatus.leftHandlePos;
+ var rightHandlePos = zoomHandleStatus.rightHandlePos;
+ var rangeSize = rightHandlePos - leftHandlePos;
+ if (leftHandlePos + delX <= self.canvasRect_.x) {
+ leftHandlePos = self.canvasRect_.x;
+ rightHandlePos = leftHandlePos + rangeSize;
+ } else if (rightHandlePos + delX >= self.canvasRect_.x + self.canvasRect_.w) {
+ rightHandlePos = self.canvasRect_.x + self.canvasRect_.w;
+ leftHandlePos = rightHandlePos - rangeSize;
+ } else {
+ leftHandlePos += delX;
+ rightHandlePos += delX;
+ }
+ var halfHandleWidth = self.leftZoomHandle_.width/2;
+ self.leftZoomHandle_.style.left = (leftHandlePos - halfHandleWidth) + 'px';
+ self.rightZoomHandle_.style.left = (rightHandlePos - halfHandleWidth) + 'px';
+ self.drawInteractiveLayer_();
+
+ // Do pan on the fly.
+ if (dynamic) {
+ doPan();
+ }
+ return true;
+ };
+
+ onPanEnd = function(e) {
+ if (!isPanning) {
+ return false;
+ }
+ isPanning = false;
+ Dygraph.removeEvent(topElem, 'mousemove', onPan);
+ Dygraph.removeEvent(topElem, 'mouseup', onPanEnd);
+ // If on a slower device, do pan now.
+ if (!dynamic) {
+ doPan();
+ }
+ return true;
+ };
+
+ doPan = function() {
+ try {
+ self.isChangingRange_ = true;
+ self.dygraph_.dateWindow_ = toXDataWindow(self.getZoomHandleStatus_());
+ self.dygraph_.drawGraph_(false);
+ } finally {
+ self.isChangingRange_ = false;
+ }
+ };
+
+ onCanvasHover = function(e) {
+ if (isZooming || isPanning) {
+ return;
+ }
+ var cursor = isMouseInPanZone(e) ? 'move' : 'default';
+ if (cursor != self.fgcanvas_.style.cursor) {
+ self.fgcanvas_.style.cursor = cursor;
+ }
+ };
+
+ onZoomHandleTouchEvent = function(e) {
+ if (e.type == 'touchstart' && e.targetTouches.length == 1) {
+ if (onZoomStart(e.targetTouches[0])) {
+ Dygraph.cancelEvent(e);
+ }
+ } else if (e.type == 'touchmove' && e.targetTouches.length == 1) {
+ if (onZoom(e.targetTouches[0])) {
+ Dygraph.cancelEvent(e);
+ }
+ } else {
+ onZoomEnd(e);
+ }
+ };
+
+ onCanvasTouchEvent = function(e) {
+ if (e.type == 'touchstart' && e.targetTouches.length == 1) {
+ if (onPanStart(e.targetTouches[0])) {
+ Dygraph.cancelEvent(e);
+ }
+ } else if (e.type == 'touchmove' && e.targetTouches.length == 1) {
+ if (onPan(e.targetTouches[0])) {
+ Dygraph.cancelEvent(e);
+ }
+ } else {
+ onPanEnd(e);
+ }
+ };
+
+ addTouchEvents = function(elem, fn) {
+ var types = ['touchstart', 'touchend', 'touchmove', 'touchcancel'];
+ for (var i = 0; i < types.length; i++) {
+ self.dygraph_.addAndTrackEvent(elem, types[i], fn);
+ }
+ };
+
+ this.setDefaultOption_('interactionModel', Dygraph.Interaction.dragIsPanInteractionModel);
+ this.setDefaultOption_('panEdgeFraction', 0.0001);
+
+ var dragStartEvent = window.opera ? 'mousedown' : 'dragstart';
+ this.dygraph_.addAndTrackEvent(this.leftZoomHandle_, dragStartEvent, onZoomStart);
+ this.dygraph_.addAndTrackEvent(this.rightZoomHandle_, dragStartEvent, onZoomStart);
+
+ this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousedown', onPanStart);
+ this.dygraph_.addAndTrackEvent(this.fgcanvas_, 'mousemove', onCanvasHover);
+
+ // Touch events
+ if (this.hasTouchInterface_) {
+ addTouchEvents(this.leftZoomHandle_, onZoomHandleTouchEvent);
+ addTouchEvents(this.rightZoomHandle_, onZoomHandleTouchEvent);
+ addTouchEvents(this.fgcanvas_, onCanvasTouchEvent);
+ }
+};
+
+/**
+ * @private
+ * Draws the static layer in the background canvas.
+ */
+rangeSelector.prototype.drawStaticLayer_ = function() {
+ var ctx = this.bgcanvas_ctx_;
+ ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h);
+ try {
+ this.drawMiniPlot_();
+ } catch(ex) {
+ console.warn(ex);
+ }
+
+ var margin = 0.5;
+ this.bgcanvas_ctx_.lineWidth = this.getOption_('rangeSelectorBackgroundLineWidth');
+ ctx.strokeStyle = this.getOption_('rangeSelectorBackgroundStrokeColor');
+ ctx.beginPath();
+ ctx.moveTo(margin, margin);
+ ctx.lineTo(margin, this.canvasRect_.h-margin);
+ ctx.lineTo(this.canvasRect_.w-margin, this.canvasRect_.h-margin);
+ ctx.lineTo(this.canvasRect_.w-margin, margin);
+ ctx.stroke();
+};
+
+
+/**
+ * @private
+ * Draws the mini plot in the background canvas.
+ */
+rangeSelector.prototype.drawMiniPlot_ = function() {
+ var fillStyle = this.getOption_('rangeSelectorPlotFillColor');
+ var fillGradientStyle = this.getOption_('rangeSelectorPlotFillGradientColor');
+ var strokeStyle = this.getOption_('rangeSelectorPlotStrokeColor');
+ if (!fillStyle && !strokeStyle) {
+ return;
+ }
+
+ var stepPlot = this.getOption_('stepPlot');
+
+ var combinedSeriesData = this.computeCombinedSeriesAndLimits_();
+ var yRange = combinedSeriesData.yMax - combinedSeriesData.yMin;
+
+ // Draw the mini plot.
+ var ctx = this.bgcanvas_ctx_;
+ var margin = 0.5;
+
+ var xExtremes = this.dygraph_.xAxisExtremes();
+ var xRange = Math.max(xExtremes[1] - xExtremes[0], 1.e-30);
+ var xFact = (this.canvasRect_.w - margin)/xRange;
+ var yFact = (this.canvasRect_.h - margin)/yRange;
+ var canvasWidth = this.canvasRect_.w - margin;
+ var canvasHeight = this.canvasRect_.h - margin;
+
+ var prevX = null, prevY = null;
+
+ ctx.beginPath();
+ ctx.moveTo(margin, canvasHeight);
+ for (var i = 0; i < combinedSeriesData.data.length; i++) {
+ var dataPoint = combinedSeriesData.data[i];
+ var x = ((dataPoint[0] !== null) ? ((dataPoint[0] - xExtremes[0])*xFact) : NaN);
+ var y = ((dataPoint[1] !== null) ? (canvasHeight - (dataPoint[1] - combinedSeriesData.yMin)*yFact) : NaN);
+
+ // Skip points that don't change the x-value. Overly fine-grained points
+ // can cause major slowdowns with the ctx.fill() call below.
+ if (!stepPlot && prevX !== null && Math.round(x) == Math.round(prevX)) {
+ continue;
+ }
+
+ if (isFinite(x) && isFinite(y)) {
+ if(prevX === null) {
+ ctx.lineTo(x, canvasHeight);
+ }
+ else if (stepPlot) {
+ ctx.lineTo(x, prevY);
+ }
+ ctx.lineTo(x, y);
+ prevX = x;
+ prevY = y;
+ }
+ else {
+ if(prevX !== null) {
+ if (stepPlot) {
+ ctx.lineTo(x, prevY);
+ ctx.lineTo(x, canvasHeight);
+ }
+ else {
+ ctx.lineTo(prevX, canvasHeight);
+ }
+ }
+ prevX = prevY = null;
+ }
+ }
+ ctx.lineTo(canvasWidth, canvasHeight);
+ ctx.closePath();
+
+ if (fillStyle) {
+ var lingrad = this.bgcanvas_ctx_.createLinearGradient(0, 0, 0, canvasHeight);
+ if (fillGradientStyle) {
+ lingrad.addColorStop(0, fillGradientStyle);
+ }
+ lingrad.addColorStop(1, fillStyle);
+ this.bgcanvas_ctx_.fillStyle = lingrad;
+ ctx.fill();
+ }
+
+ if (strokeStyle) {
+ this.bgcanvas_ctx_.strokeStyle = strokeStyle;
+ this.bgcanvas_ctx_.lineWidth = this.getOption_('rangeSelectorPlotLineWidth');
+ ctx.stroke();
+ }
+};
+
+/**
+ * @private
+ * Computes and returns the combined series data along with min/max for the mini plot.
+ * The combined series consists of averaged values for all series.
+ * When series have error bars, the error bars are ignored.
+ * @return {Object} An object containing combined series array, ymin, ymax.
+ */
+rangeSelector.prototype.computeCombinedSeriesAndLimits_ = function() {
+ var g = this.dygraph_;
+ var logscale = this.getOption_('logscale');
+ var i;
+
+ // Select series to combine. By default, all series are combined.
+ var numColumns = g.numColumns();
+ var labels = g.getLabels();
+ var includeSeries = new Array(numColumns);
+ var anySet = false;
+ for (i = 1; i < numColumns; i++) {
+ var include = this.getOption_('showInRangeSelector', labels[i]);
+ includeSeries[i] = include;
+ if (include !== null) anySet = true; // it's set explicitly for this series
+ }
+ if (!anySet) {
+ for (i = 0; i < includeSeries.length; i++) includeSeries[i] = true;
+ }
+
+ // Create a combined series (average of selected series values).
+ // TODO(danvk): short-circuit if there's only one series.
+ var rolledSeries = [];
+ var dataHandler = g.dataHandler_;
+ var options = g.attributes_;
+ for (i = 1; i < g.numColumns(); i++) {
+ if (!includeSeries[i]) continue;
+ var series = dataHandler.extractSeries(g.rawData_, i, options);
+ if (g.rollPeriod() > 1) {
+ series = dataHandler.rollingAverage(series, g.rollPeriod(), options);
+ }
+
+ rolledSeries.push(series);
+ }
+
+ var combinedSeries = [];
+ for (i = 0; i < rolledSeries[0].length; i++) {
+ var sum = 0;
+ var count = 0;
+ for (var j = 0; j < rolledSeries.length; j++) {
+ var y = rolledSeries[j][i][1];
+ if (y === null || isNaN(y)) continue;
+ count++;
+ sum += y;
+ }
+ combinedSeries.push([rolledSeries[0][i][0], sum / count]);
+ }
+
+ // Compute the y range.
+ var yMin = Number.MAX_VALUE;
+ var yMax = -Number.MAX_VALUE;
+ for (i = 0; i < combinedSeries.length; i++) {
+ var yVal = combinedSeries[i][1];
+ if (yVal !== null && isFinite(yVal) && (!logscale || yVal > 0)) {
+ yMin = Math.min(yMin, yVal);
+ yMax = Math.max(yMax, yVal);
+ }
+ }
+
+ // Convert Y data to log scale if needed.
+ // Also, expand the Y range to compress the mini plot a little.
+ var extraPercent = 0.25;
+ if (logscale) {
+ yMax = Dygraph.log10(yMax);
+ yMax += yMax*extraPercent;
+ yMin = Dygraph.log10(yMin);
+ for (i = 0; i < combinedSeries.length; i++) {
+ combinedSeries[i][1] = Dygraph.log10(combinedSeries[i][1]);
+ }
+ } else {
+ var yExtra;
+ var yRange = yMax - yMin;
+ if (yRange <= Number.MIN_VALUE) {
+ yExtra = yMax*extraPercent;
+ } else {
+ yExtra = yRange*extraPercent;
+ }
+ yMax += yExtra;
+ yMin -= yExtra;
+ }
+
+ return {data: combinedSeries, yMin: yMin, yMax: yMax};
+};
+
+/**
+ * @private
+ * Places the zoom handles in the proper position based on the current X data window.
+ */
+rangeSelector.prototype.placeZoomHandles_ = function() {
+ var xExtremes = this.dygraph_.xAxisExtremes();
+ var xWindowLimits = this.dygraph_.xAxisRange();
+ var xRange = xExtremes[1] - xExtremes[0];
+ var leftPercent = Math.max(0, (xWindowLimits[0] - xExtremes[0])/xRange);
+ var rightPercent = Math.max(0, (xExtremes[1] - xWindowLimits[1])/xRange);
+ var leftCoord = this.canvasRect_.x + this.canvasRect_.w*leftPercent;
+ var rightCoord = this.canvasRect_.x + this.canvasRect_.w*(1 - rightPercent);
+ var handleTop = Math.max(this.canvasRect_.y, this.canvasRect_.y + (this.canvasRect_.h - this.leftZoomHandle_.height)/2);
+ var halfHandleWidth = this.leftZoomHandle_.width/2;
+ this.leftZoomHandle_.style.left = (leftCoord - halfHandleWidth) + 'px';
+ this.leftZoomHandle_.style.top = handleTop + 'px';
+ this.rightZoomHandle_.style.left = (rightCoord - halfHandleWidth) + 'px';
+ this.rightZoomHandle_.style.top = this.leftZoomHandle_.style.top;
+
+ this.leftZoomHandle_.style.visibility = 'visible';
+ this.rightZoomHandle_.style.visibility = 'visible';
+};
+
+/**
+ * @private
+ * Draws the interactive layer in the foreground canvas.
+ */
+rangeSelector.prototype.drawInteractiveLayer_ = function() {
+ var ctx = this.fgcanvas_ctx_;
+ ctx.clearRect(0, 0, this.canvasRect_.w, this.canvasRect_.h);
+ var margin = 1;
+ var width = this.canvasRect_.w - margin;
+ var height = this.canvasRect_.h - margin;
+ var zoomHandleStatus = this.getZoomHandleStatus_();
+
+ ctx.strokeStyle = this.getOption_('rangeSelectorForegroundStrokeColor');
+ ctx.lineWidth = this.getOption_('rangeSelectorForegroundLineWidth');
+ if (!zoomHandleStatus.isZoomed) {
+ ctx.beginPath();
+ ctx.moveTo(margin, margin);
+ ctx.lineTo(margin, height);
+ ctx.lineTo(width, height);
+ ctx.lineTo(width, margin);
+ ctx.stroke();
+ } else {
+ var leftHandleCanvasPos = Math.max(margin, zoomHandleStatus.leftHandlePos - this.canvasRect_.x);
+ var rightHandleCanvasPos = Math.min(width, zoomHandleStatus.rightHandlePos - this.canvasRect_.x);
+
+ ctx.fillStyle = 'rgba(240, 240, 240, ' + this.getOption_('rangeSelectorAlpha').toString() + ')';
+ ctx.fillRect(0, 0, leftHandleCanvasPos, this.canvasRect_.h);
+ ctx.fillRect(rightHandleCanvasPos, 0, this.canvasRect_.w - rightHandleCanvasPos, this.canvasRect_.h);
+
+ ctx.beginPath();
+ ctx.moveTo(margin, margin);
+ ctx.lineTo(leftHandleCanvasPos, margin);
+ ctx.lineTo(leftHandleCanvasPos, height);
+ ctx.lineTo(rightHandleCanvasPos, height);
+ ctx.lineTo(rightHandleCanvasPos, margin);
+ ctx.lineTo(width, margin);
+ ctx.stroke();
+ }
+};
+
+/**
+ * @private
+ * Returns the current zoom handle position information.
+ * @return {Object} The zoom handle status.
+ */
+rangeSelector.prototype.getZoomHandleStatus_ = function() {
+ var halfHandleWidth = this.leftZoomHandle_.width/2;
+ var leftHandlePos = parseFloat(this.leftZoomHandle_.style.left) + halfHandleWidth;
+ var rightHandlePos = parseFloat(this.rightZoomHandle_.style.left) + halfHandleWidth;
+ return {
+ leftHandlePos: leftHandlePos,
+ rightHandlePos: rightHandlePos,
+ isZoomed: (leftHandlePos - 1 > this.canvasRect_.x || rightHandlePos + 1 < this.canvasRect_.x+this.canvasRect_.w)
+ };
+};
+
+return rangeSelector;
+
+})();
projects / dygraphs.git / blobdiff