-// MIT License:
-//
-// Copyright (c) 2010-2013, Joe Walnes
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
+;(function(exports) {
+
+/**
+ * @license
+ * MIT License:
+ *
+ * Copyright (c) 2010-2013, Joe Walnes
+ * 2013-2018, Drew Noakes
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
/**
* Smoothie Charts - http://smoothiecharts.org/
* (c) 2010-2013, Joe Walnes
- * 2013, Drew Noakes
+ * 2013-2018, Drew Noakes
*
* v1.0: Main charting library, by Joe Walnes
* v1.1: Auto scaling of axis, by Neil Dunn
* Added 'borderVisible' chart option, by @drewnoakes
* Allow drawing series with fill but no stroke (line), by @drewnoakes
* v1.19: Avoid unnecessary repaints, and fixed flicker in old browsers having multiple charts in document (#40), by @asbai
- * v1.19-tvh: Moved the axis labels to the left, by @john-tornblom
+ * v1.20: Add SmoothieChart.getTimeSeriesOptions and SmoothieChart.bringToFront functions, by @drewnoakes
+ * v1.21: Add 'step' interpolation mode, by @drewnoakes
+ * v1.22: Add support for different pixel ratios. Also add optional y limit formatters, by @copacetic
+ * v1.23: Fix bug introduced in v1.22 (#44), by @drewnoakes
+ * v1.24: Fix bug introduced in v1.23, re-adding parseFloat to y-axis formatter defaults, by @siggy_sf
+ * v1.25: Fix bug seen when adding a data point to TimeSeries which is older than the current data, by @Nking92
+ * Draw time labels on top of series, by @comolosabia
+ * Add TimeSeries.clear function, by @drewnoakes
+ * v1.26: Add support for resizing on high device pixel ratio screens, by @copacetic
+ * v1.27: Fix bug introduced in v1.26 for non whole number devicePixelRatio values, by @zmbush
+ * v1.28: Add 'minValueScale' option, by @megawac
+ * Fix 'labelPos' for different size of 'minValueString' 'maxValueString', by @henryn
+ * v1.29: Support responsive sizing, by @drewnoakes
+ * v1.29.1: Include types in package, and make property optional, by @TrentHouliston
+ * v1.30: Fix inverted logic in devicePixelRatio support, by @scanlime
+ * v1.31: Support tooltips, by @Sly1024 and @drewnoakes
+ * v1.32: Support frame rate limit, by @dpuyosa
+ * v1.33: Use Date static method instead of instance, by @nnnoel
+ * Fix bug with tooltips when multiple charts on a page, by @jpmbiz70
+ * v1.34: Add disabled option to TimeSeries, by @TechGuard (#91)
+ * Add nonRealtimeData option, by @annazhelt (#92, #93)
+ * Add showIntermediateLabels option, by @annazhelt (#94)
+ * Add displayDataFromPercentile option, by @annazhelt (#95)
+ * Fix bug when hiding tooltip element, by @ralphwetzel (#96)
+ * Support intermediate y-axis labels, by @beikeland (#99)
+ * v1.35: Fix issue with responsive mode at high DPI, by @drewnoakes (#101)
+ * v1.36: Add tooltipLabel to ITimeSeriesPresentationOptions.
+ * If tooltipLabel is present, tooltipLabel displays inside tooltip
+ * next to value, by @jackdesert (#102)
+ * Fix bug rendering issue in series fill when using scroll backwards, by @olssonfredrik
+ * Add title option, by @mesca
+ * Fix data drop stoppage by rejecting NaNs in append(), by @timdrysdale
+ * Allow setting interpolation per time series, by @WofWca (#123)
+ * Fix chart constantly jumping in 1-2 pixel steps, by @WofWca (#131)
+ * Fix a memory leak appearing when some `timeSeries.disabled === true`, by @WofWca (#132)
+ * Fix: make all lines sharp, remove the `grid.sharpLines` option by @WofWca (#134)
+ * Improve performance, by @WofWca (#135)
+ * Fix `this.delay` not being respected with `nonRealtimeData: true`, by @WofWca (#137)
+ * Fix series fill & stroke being inconsistent for last data time < render time, by @WofWca (#138)
+ * v1.36.1: Fix a potential XSS when `tooltipLabel` or `strokeStyle` are controlled by users, by @WofWca
+ * v1.36.2: fix: 1px lines jumping 1px left and right at rational `millisPerPixel`, by @WofWca
+ * perf: improve `render()` performane a bit, by @WofWca
+ * v1.37: Add `fillToBottom` option to fill timeSeries to 0 instead of to the bottom of the canvas, by @socketpair & @WofWca (#140)
+ * v1.37-tvh: Moved the axis labels to the left, by @john-tornblom and @Trujulu
*/
-;(function(exports) {
+ // Date.now polyfill
+ Date.now = Date.now || function() { return new Date().getTime(); };
var Util = {
extend: function() {
}
}
return arguments[0];
- }
+ },
+ binarySearch: function(data, value) {
+ var low = 0,
+ high = data.length;
+ while (low < high) {
+ var mid = (low + high) >> 1;
+ if (value < data[mid][0])
+ high = mid;
+ else
+ low = mid + 1;
+ }
+ return low;
+ },
+ // So lines (especially vertical and horizontal) look a) consistent along their length and b) sharp.
+ pixelSnap: function(position, lineWidth) {
+ if (lineWidth % 2 === 0) {
+ // Closest pixel edge.
+ return Math.round(position);
+ } else {
+ // Closest pixel center.
+ return Math.floor(position) + 0.5;
+ }
+ },
};
/**
*/
function TimeSeries(options) {
this.options = Util.extend({}, TimeSeries.defaultOptions, options);
- this.data = [];
- this.maxValue = Number.NaN; // The maximum value ever seen in this TimeSeries.
- this.minValue = Number.NaN; // The minimum value ever seen in this TimeSeries.
+ this.disabled = false;
+ this.clear();
}
TimeSeries.defaultOptions = {
resetBounds: true
};
+ /**
+ * Clears all data and state from this TimeSeries object.
+ */
+ TimeSeries.prototype.clear = function() {
+ this.data = [];
+ this.maxValue = Number.NaN; // The maximum value ever seen in this TimeSeries.
+ this.minValue = Number.NaN; // The minimum value ever seen in this TimeSeries.
+ };
+
/**
* Recalculate the min/max values for this <code>TimeSeries</code> object.
*
* whether it is replaced, or the values summed (defaults to false.)
*/
TimeSeries.prototype.append = function(timestamp, value, sumRepeatedTimeStampValues) {
- // Rewind until we hit an older timestamp
- var i = this.data.length - 1;
- while (i > 0 && this.data[i][0] > timestamp) {
- i--;
- }
-
- if (this.data.length > 0 && this.data[i][0] === timestamp) {
- // Update existing values in the array
- if (sumRepeatedTimeStampValues) {
- // Sum this value into the existing 'bucket'
- this.data[i][1] += value;
- value = this.data[i][1];
- } else {
- // Replace the previous value
- this.data[i][1] = value;
+ // Reject NaN
+ if (isNaN(timestamp) || isNaN(value)){
+ return
+ }
+
+ var lastI = this.data.length - 1;
+ if (lastI >= 0) {
+ // Rewind until we find the place for the new data
+ var i = lastI;
+ while (true) {
+ var iThData = this.data[i];
+ if (timestamp >= iThData[0]) {
+ if (timestamp === iThData[0]) {
+ // Update existing values in the array
+ if (sumRepeatedTimeStampValues) {
+ // Sum this value into the existing 'bucket'
+ iThData[1] += value;
+ value = iThData[1];
+ } else {
+ // Replace the previous value
+ iThData[1] = value;
+ }
+ } else {
+ // Splice into the correct position to keep timestamps in order
+ this.data.splice(i + 1, 0, [timestamp, value]);
+ }
+
+ break;
+ }
+
+ i--;
+ if (i < 0) {
+ // This new item is the oldest data
+ this.data.splice(0, 0, [timestamp, value]);
+
+ break;
+ }
}
- } else if (i < this.data.length - 1) {
- // Splice into the correct position to keep timestamps in order
- this.data.splice(i + 1, 0, [timestamp, value]);
} else {
- // Add to the end of the array
+ // It's the first element
this.data.push([timestamp, value]);
}
*
* <pre>
* {
- * minValue: undefined, // specify to clamp the lower y-axis to a given value
- * maxValue: undefined, // specify to clamp the upper y-axis to a given value
- * maxValueScale: 1, // allows proportional padding to be added above the chart. for 10% padding, specify 1.1.
- * yRangeFunction: undefined, // function({min: , max: }) { return {min: , max: }; }
- * scaleSmoothing: 0.125, // controls the rate at which y-value zoom animation occurs
- * millisPerPixel: 20, // sets the speed at which the chart pans by
+ * minValue: undefined, // specify to clamp the lower y-axis to a given value
+ * maxValue: undefined, // specify to clamp the upper y-axis to a given value
+ * maxValueScale: 1, // allows proportional padding to be added above the chart. for 10% padding, specify 1.1.
+ * minValueScale: 1, // allows proportional padding to be added below the chart. for 10% padding, specify 1.1.
+ * yRangeFunction: undefined, // function({min: , max: }) { return {min: , max: }; }
+ * scaleSmoothing: 0.125, // controls the rate at which y-value zoom animation occurs
+ * millisPerPixel: 20, // sets the speed at which the chart pans by
+ * enableDpiScaling: true, // support rendering at different DPI depending on the device
+ * yMinFormatter: function(min, precision) { // callback function that formats the min y value label
+ * return parseFloat(min).toFixed(precision);
+ * },
+ * yMaxFormatter: function(max, precision) { // callback function that formats the max y value label
+ * return parseFloat(max).toFixed(precision);
+ * },
+ * yIntermediateFormatter: function(intermediate, precision) { // callback function that formats the intermediate y value labels
+ * return parseFloat(intermediate).toFixed(precision);
+ * },
* maxDataSetLength: 2,
- * interpolation: 'bezier' // or 'linear'
- * timestampFormatter: null, // Optional function to format time stamps for bottom of chart. You may use SmoothieChart.timeFormatter, or your own: function(date) { return ''; }
- * horizontalLines: [], // [ { value: 0, color: '#ffffff', lineWidth: 1 } ],
+ * interpolation: 'bezier' // one of 'bezier', 'linear', or 'step'
+ * timestampFormatter: null, // optional function to format time stamps for bottom of chart
+ * // you may use SmoothieChart.timeFormatter, or your own: function(date) { return ''; }
+ * scrollBackwards: false, // reverse the scroll direction of the chart
+ * horizontalLines: [], // [ { value: 0, color: '#ffffff', lineWidth: 1 } ]
* grid:
* {
- * fillStyle: '#000000', // the background colour of the chart
- * lineWidth: 1, // the pixel width of grid lines
- * strokeStyle: '#777777', // colour of grid lines
- * millisPerLine: 1000, // distance between vertical grid lines
- * sharpLines: false, // controls whether grid lines are 1px sharp, or softened
- * verticalSections: 2, // number of vertical sections marked out by horizontal grid lines
- * borderVisible: true // whether the grid lines trace the border of the chart or not
+ * fillStyle: '#000000', // the background colour of the chart
+ * lineWidth: 1, // the pixel width of grid lines
+ * strokeStyle: '#777777', // colour of grid lines
+ * millisPerLine: 1000, // distance between vertical grid lines
+ * verticalSections: 2, // number of vertical sections marked out by horizontal grid lines
+ * borderVisible: true // whether the grid lines trace the border of the chart or not
* },
* labels
* {
- * disabled: false, // enables/disables labels showing the min/max values
- * fillStyle: '#ffffff', // colour for text of labels,
+ * disabled: false, // enables/disables labels showing the min/max values
+ * fillStyle: '#ffffff', // colour for text of labels,
* fontSize: 15,
* fontFamily: 'sans-serif',
- * precision: 2
+ * precision: 2,
+ * showIntermediateLabels: false, // shows intermediate labels between min and max values along y axis
+ * intermediateLabelSameAxis: true,
* },
+ * title
+ * {
+ * text: '', // the text to display on the left side of the chart
+ * fillStyle: '#ffffff', // colour for text
+ * fontSize: 15,
+ * fontFamily: 'sans-serif',
+ * verticalAlign: 'middle' // one of 'top', 'middle', or 'bottom'
+ * },
+ * tooltip: false // show tooltip when mouse is over the chart
+ * tooltipLine: { // properties for a vertical line at the cursor position
+ * lineWidth: 1,
+ * strokeStyle: '#BBBBBB'
+ * },
+ * tooltipFormatter: SmoothieChart.tooltipFormatter, // formatter function for tooltip text
+ * nonRealtimeData: false, // use time of latest data as current time
+ * displayDataFromPercentile: 1, // display not latest data, but data from the given percentile
+ * // useful when trying to see old data saved by setting a high value for maxDataSetLength
+ * // should be a value between 0 and 1
+ * responsive: false, // whether the chart should adapt to the size of the canvas
+ * limitFPS: 0 // maximum frame rate the chart will render at, in FPS (zero means no limit)
* }
* </pre>
*
this.currentValueRange = 1;
this.currentVisMinValue = 0;
this.lastRenderTimeMillis = 0;
+ this.lastChartTimestamp = 0;
+
+ this.mousemove = this.mousemove.bind(this);
+ this.mouseout = this.mouseout.bind(this);
}
+ /** Formats the HTML string content of the tooltip. */
+ SmoothieChart.tooltipFormatter = function (timestamp, data) {
+ var timestampFormatter = this.options.timestampFormatter || SmoothieChart.timeFormatter,
+ // A dummy element to hold children. Maybe there's a better way.
+ elements = document.createElement('div'),
+ label;
+ elements.appendChild(document.createTextNode(
+ timestampFormatter(new Date(timestamp))
+ ));
+
+ for (var i = 0; i < data.length; ++i) {
+ label = data[i].series.options.tooltipLabel || ''
+ if (label !== ''){
+ label = label + ' ';
+ }
+ var dataEl = document.createElement('span');
+ dataEl.style.color = data[i].series.options.strokeStyle;
+ dataEl.appendChild(document.createTextNode(
+ label + this.options.yMaxFormatter(data[i].value, this.options.labels.precision)
+ ));
+ elements.appendChild(document.createElement('br'));
+ elements.appendChild(dataEl);
+ }
+
+ return elements.innerHTML;
+ };
+
SmoothieChart.defaultChartOptions = {
millisPerPixel: 20,
+ enableDpiScaling: true,
+ yMinFormatter: function(min, precision) {
+ return parseFloat(min).toFixed(precision);
+ },
+ yMaxFormatter: function(max, precision) {
+ return parseFloat(max).toFixed(precision);
+ },
+ yIntermediateFormatter: function(intermediate, precision) {
+ return parseFloat(intermediate).toFixed(precision);
+ },
maxValueScale: 1,
+ minValueScale: 1,
interpolation: 'bezier',
scaleSmoothing: 0.125,
maxDataSetLength: 2,
+ scrollBackwards: false,
+ displayDataFromPercentile: 1,
grid: {
fillStyle: '#000000',
strokeStyle: '#777777',
- lineWidth: 1,
- sharpLines: false,
+ lineWidth: 2,
millisPerLine: 1000,
verticalSections: 2,
borderVisible: true
disabled: false,
fontSize: 10,
fontFamily: 'monospace',
- precision: 2
+ precision: 2,
+ showIntermediateLabels: false,
+ intermediateLabelSameAxis: true,
},
- horizontalLines: []
+ title: {
+ text: '',
+ fillStyle: '#ffffff',
+ fontSize: 15,
+ fontFamily: 'monospace',
+ verticalAlign: 'middle'
+ },
+ horizontalLines: [],
+ tooltip: false,
+ tooltipLine: {
+ lineWidth: 1,
+ strokeStyle: '#BBBBBB'
+ },
+ tooltipFormatter: SmoothieChart.tooltipFormatter,
+ nonRealtimeData: false,
+ responsive: false,
+ limitFPS: 0
};
// Based on http://inspirit.github.com/jsfeat/js/compatibility.js
window.msRequestAnimationFrame ||
function(callback) {
return window.setTimeout(function() {
- callback(new Date().getTime());
+ callback(Date.now());
}, 16);
};
return requestAnimationFrame.call(window, callback, element);
SmoothieChart.defaultSeriesPresentationOptions = {
lineWidth: 1,
- strokeStyle: '#ffffff'
+ strokeStyle: '#ffffff',
+ // Maybe default to false in the next breaking version.
+ fillToBottom: true,
};
/**
* {
* lineWidth: 1,
* strokeStyle: '#ffffff',
- * fillStyle: undefined
+ * fillStyle: undefined,
+ * interpolation: undefined;
+ * tooltipLabel: undefined,
+ * fillToBottom: true,
* }
* </pre>
*/
}
};
+ /**
+ * Gets render options for the specified <code>TimeSeries</code>.
+ *
+ * As you may use a single <code>TimeSeries</code> in multiple charts with different formatting in each usage,
+ * these settings are stored in the chart.
+ */
+ SmoothieChart.prototype.getTimeSeriesOptions = function(timeSeries) {
+ // Find the correct timeseries to remove, and remove it
+ var numSeries = this.seriesSet.length;
+ for (var i = 0; i < numSeries; i++) {
+ if (this.seriesSet[i].timeSeries === timeSeries) {
+ return this.seriesSet[i].options;
+ }
+ }
+ };
+
+ /**
+ * Brings the specified <code>TimeSeries</code> to the top of the chart. It will be rendered last.
+ */
+ SmoothieChart.prototype.bringToFront = function(timeSeries) {
+ // Find the correct timeseries to remove, and remove it
+ var numSeries = this.seriesSet.length;
+ for (var i = 0; i < numSeries; i++) {
+ if (this.seriesSet[i].timeSeries === timeSeries) {
+ var set = this.seriesSet.splice(i, 1);
+ this.seriesSet.push(set[0]);
+ break;
+ }
+ }
+ };
+
/**
* Instructs the <code>SmoothieChart</code> to start rendering to the provided canvas, with specified delay.
*
*/
SmoothieChart.prototype.streamTo = function(canvas, delayMillis) {
this.canvas = canvas;
+
+ this.clientWidth = parseInt(this.canvas.getAttribute('width'));
+ this.clientHeight = parseInt(this.canvas.getAttribute('height'));
+
this.delay = delayMillis;
this.start();
};
+ SmoothieChart.prototype.getTooltipEl = function () {
+ // Create the tool tip element lazily
+ if (!this.tooltipEl) {
+ this.tooltipEl = document.createElement('div');
+ this.tooltipEl.className = 'smoothie-chart-tooltip';
+ this.tooltipEl.style.pointerEvents = 'none';
+ this.tooltipEl.style.position = 'absolute';
+ this.tooltipEl.style.display = 'none';
+ document.body.appendChild(this.tooltipEl);
+ }
+ return this.tooltipEl;
+ };
+
+ SmoothieChart.prototype.updateTooltip = function () {
+ if(!this.options.tooltip){
+ return;
+ }
+ var el = this.getTooltipEl();
+
+ if (!this.mouseover || !this.options.tooltip) {
+ el.style.display = 'none';
+ return;
+ }
+
+ var time = this.lastChartTimestamp;
+
+ // x pixel to time
+ var t = this.options.scrollBackwards
+ ? time - this.mouseX * this.options.millisPerPixel
+ : time - (this.clientWidth - this.mouseX) * this.options.millisPerPixel;
+
+ var data = [];
+
+ // For each data set...
+ for (var d = 0; d < this.seriesSet.length; d++) {
+ var timeSeries = this.seriesSet[d].timeSeries;
+ if (timeSeries.disabled) {
+ continue;
+ }
+
+ // find datapoint closest to time 't'
+ var closeIdx = Util.binarySearch(timeSeries.data, t);
+ if (closeIdx > 0 && closeIdx < timeSeries.data.length) {
+ data.push({ series: this.seriesSet[d], index: closeIdx, value: timeSeries.data[closeIdx][1] });
+ }
+ }
+
+ if (data.length) {
+ // TODO make `tooltipFormatter` return element(s) instead of an HTML string so it's harder for users
+ // to introduce an XSS. This would be a breaking change.
+ el.innerHTML = this.options.tooltipFormatter.call(this, t, data);
+ el.style.display = 'block';
+ } else {
+ el.style.display = 'none';
+ }
+ };
+
+ SmoothieChart.prototype.mousemove = function (evt) {
+ this.mouseover = true;
+ this.mouseX = evt.offsetX;
+ this.mouseY = evt.offsetY;
+ this.mousePageX = evt.pageX;
+ this.mousePageY = evt.pageY;
+ if(!this.options.tooltip){
+ return;
+ }
+ var el = this.getTooltipEl();
+ el.style.top = Math.round(this.mousePageY) + 'px';
+ el.style.left = Math.round(this.mousePageX) + 'px';
+ this.updateTooltip();
+ };
+
+ SmoothieChart.prototype.mouseout = function () {
+ this.mouseover = false;
+ this.mouseX = this.mouseY = -1;
+ if (this.tooltipEl)
+ this.tooltipEl.style.display = 'none';
+ };
+
+ /**
+ * Make sure the canvas has the optimal resolution for the device's pixel ratio.
+ */
+ SmoothieChart.prototype.resize = function () {
+ var dpr = !this.options.enableDpiScaling || !window ? 1 : window.devicePixelRatio,
+ width, height;
+ if (this.options.responsive) {
+ // Newer behaviour: Use the canvas's size in the layout, and set the internal
+ // resolution according to that size and the device pixel ratio (eg: high DPI)
+ width = this.canvas.offsetWidth;
+ height = this.canvas.offsetHeight;
+
+ if (width !== this.lastWidth) {
+ this.lastWidth = width;
+ this.canvas.setAttribute('width', (Math.floor(width * dpr)).toString());
+ this.canvas.getContext('2d').scale(dpr, dpr);
+ }
+ if (height !== this.lastHeight) {
+ this.lastHeight = height;
+ this.canvas.setAttribute('height', (Math.floor(height * dpr)).toString());
+ this.canvas.getContext('2d').scale(dpr, dpr);
+ }
+
+ this.clientWidth = width;
+ this.clientHeight = height;
+ } else {
+ width = parseInt(this.canvas.getAttribute('width'));
+ height = parseInt(this.canvas.getAttribute('height'));
+
+ if (dpr !== 1) {
+ // Older behaviour: use the canvas's inner dimensions and scale the element's size
+ // according to that size and the device pixel ratio (eg: high DPI)
+
+ if (Math.floor(this.clientWidth * dpr) !== width) {
+ this.canvas.setAttribute('width', (Math.floor(width * dpr)).toString());
+ this.canvas.style.width = width + 'px';
+ this.clientWidth = width;
+ this.canvas.getContext('2d').scale(dpr, dpr);
+ }
+
+ if (Math.floor(this.clientHeight * dpr) !== height) {
+ this.canvas.setAttribute('height', (Math.floor(height * dpr)).toString());
+ this.canvas.style.height = height + 'px';
+ this.clientHeight = height;
+ this.canvas.getContext('2d').scale(dpr, dpr);
+ }
+ } else {
+ this.clientWidth = width;
+ this.clientHeight = height;
+ }
+ }
+ };
+
/**
* Starts the animation of this chart.
*/
return;
}
+ this.canvas.addEventListener('mousemove', this.mousemove);
+ this.canvas.addEventListener('mouseout', this.mouseout);
+
// Renders a frame, and queues the next frame for later rendering
var animate = function() {
this.frame = SmoothieChart.AnimateCompatibility.requestAnimationFrame(function() {
- this.render();
+ if(this.options.nonRealtimeData){
+ var dateZero = new Date(0);
+ // find the data point with the latest timestamp
+ var maxTimeStamp = this.seriesSet.reduce(function(max, series){
+ var dataSet = series.timeSeries.data;
+ var indexToCheck = Math.round(this.options.displayDataFromPercentile * dataSet.length) - 1;
+ indexToCheck = indexToCheck >= 0 ? indexToCheck : 0;
+ indexToCheck = indexToCheck <= dataSet.length -1 ? indexToCheck : dataSet.length -1;
+ if(dataSet && dataSet.length > 0)
+ {
+ // timestamp corresponds to element 0 of the data point
+ var lastDataTimeStamp = dataSet[indexToCheck][0];
+ max = max > lastDataTimeStamp ? max : lastDataTimeStamp;
+ }
+ return max;
+ }.bind(this), dateZero);
+ // use the max timestamp as current time
+ this.render(this.canvas, maxTimeStamp > dateZero ? maxTimeStamp : null);
+ } else {
+ this.render();
+ }
animate();
}.bind(this));
}.bind(this);
if (this.frame) {
SmoothieChart.AnimateCompatibility.cancelAnimationFrame(this.frame);
delete this.frame;
+ this.canvas.removeEventListener('mousemove', this.mousemove);
+ this.canvas.removeEventListener('mouseout', this.mouseout);
}
};
for (var d = 0; d < this.seriesSet.length; d++) {
// TODO(ndunn): We could calculate / track these values as they stream in.
var timeSeries = this.seriesSet[d].timeSeries;
+ if (timeSeries.disabled) {
+ continue;
+ }
+
if (!isNaN(timeSeries.maxValue)) {
chartMaxValue = !isNaN(chartMaxValue) ? Math.max(chartMaxValue, timeSeries.maxValue) : timeSeries.maxValue;
}
// Set the minimum if we've specified one
if (chartOptions.minValue != null) {
chartMinValue = chartOptions.minValue;
+ } else {
+ chartMinValue -= Math.abs(chartMinValue * chartOptions.minValueScale - chartMinValue);
}
// If a custom range function is set, call it
};
SmoothieChart.prototype.render = function(canvas, time) {
- var nowMillis = new Date().getTime();
+ var chartOptions = this.options,
+ nowMillis = Date.now();
+
+ // Respect any frame rate limit.
+ if (chartOptions.limitFPS > 0 && nowMillis - this.lastRenderTimeMillis < (1000/chartOptions.limitFPS))
+ return;
+
+ time = (time || nowMillis) - (this.delay || 0);
+
+ // Round time down to pixel granularity, so that pixel sample values remain the same,
+ // just shifted 1px to the left, so motion appears smoother.
+ time -= time % chartOptions.millisPerPixel;
if (!this.isAnimatingScale) {
// We're not animating. We can use the last render time and the scroll speed to work out whether
// we actually need to paint anything yet. If not, we can return immediately.
-
- // Render at least every 1/6th of a second. The canvas may be resized, which there is
- // no reliable way to detect.
- var maxIdleMillis = Math.min(1000/6, this.options.millisPerPixel);
-
- if (nowMillis - this.lastRenderTimeMillis < maxIdleMillis) {
- return;
+ var sameTime = this.lastChartTimestamp === time;
+ if (sameTime) {
+ // Render at least every 1/6th of a second. The canvas may be resized, which there is
+ // no reliable way to detect.
+ var needToRenderInCaseCanvasResized = nowMillis - this.lastRenderTimeMillis > 1000/6;
+ if (!needToRenderInCaseCanvasResized) {
+ return;
+ }
}
}
+
this.lastRenderTimeMillis = nowMillis;
-
- canvas = canvas || this.canvas;
- time = time || nowMillis - (this.delay || 0);
+ this.lastChartTimestamp = time;
- // Round time down to pixel granularity, so motion appears smoother.
- time -= time % this.options.millisPerPixel;
+ this.resize();
+ canvas = canvas || this.canvas;
var context = canvas.getContext('2d'),
- chartOptions = this.options,
- dimensions = { top: 0, left: 0, width: canvas.clientWidth, height: canvas.clientHeight },
+ // Using `this.clientWidth` instead of `canvas.clientWidth` because the latter is slow.
+ dimensions = { top: 0, left: 0, width: this.clientWidth, height: this.clientHeight },
// Calculate the threshold time for the oldest data points.
oldestValidTime = time - (dimensions.width * chartOptions.millisPerPixel),
- valueToYPixel = function(value) {
- var offset = value - this.currentVisMinValue;
- return this.currentValueRange === 0
- ? dimensions.height
- : dimensions.height - (Math.round((offset / this.currentValueRange) * dimensions.height));
+ valueToYPosition = function(value, lineWidth) {
+ var offset = value - this.currentVisMinValue,
+ unsnapped = this.currentValueRange === 0
+ ? dimensions.height
+ : dimensions.height * (1 - offset / this.currentValueRange);
+ return Util.pixelSnap(unsnapped, lineWidth);
}.bind(this),
- timeToXPixel = function(t) {
- return Math.round(dimensions.width - ((time - t) / chartOptions.millisPerPixel));
+ timeToXPosition = function(t, lineWidth) {
+ // Why not write it as `(time - t) / chartOptions.millisPerPixel`:
+ // If a datapoint's `t` is very close or is at the center of a pixel, that expression,
+ // due to floating point error, may take value whose `% 1` sometimes is very close to
+ // 0 and sometimes is close to 1, depending on the value of render time (`time`),
+ // which would make `pixelSnap` snap it sometimes to the right and sometimes to the left,
+ // which would look like it's jumping.
+ // You can try the default examples, with `millisPerPixel = 100 / 3` and
+ // `grid.lineWidth = 1`. The grid would jump.
+ // Writing it this way seems to avoid such inconsistency because in the above example
+ // `offset` is (almost?) always a whole number.
+ // TODO Maybe there's a more elegant (and reliable?) way.
+ var offset = time / chartOptions.millisPerPixel - t / chartOptions.millisPerPixel;
+ var unsnapped = chartOptions.scrollBackwards
+ ? offset
+ : dimensions.width - offset;
+ return Util.pixelSnap(unsnapped, lineWidth);
};
this.updateValueRange();
context.strokeStyle = chartOptions.grid.strokeStyle;
// Vertical (time) dividers.
if (chartOptions.grid.millisPerLine > 0) {
- var textUntilX = dimensions.width - context.measureText(minValueString).width + 4;
+ context.beginPath();
for (var t = time - (time % chartOptions.grid.millisPerLine);
t >= oldestValidTime;
t -= chartOptions.grid.millisPerLine) {
- var gx = timeToXPixel(t);
- if (chartOptions.grid.sharpLines) {
- gx -= 0.5;
- }
- context.beginPath();
+ var gx = timeToXPosition(t, chartOptions.grid.lineWidth);
context.moveTo(gx, 0);
context.lineTo(gx, dimensions.height);
- context.stroke();
- context.closePath();
-
- // Display timestamp at bottom of this line if requested, and it won't overlap
- if (chartOptions.timestampFormatter && gx < textUntilX) {
- // Formats the timestamp based on user specified formatting function
- // SmoothieChart.timeFormatter function above is one such formatting option
- var tx = new Date(t),
- ts = chartOptions.timestampFormatter(tx),
- tsWidth = context.measureText(ts).width;
- textUntilX = gx - tsWidth - 2;
- context.fillStyle = chartOptions.labels.fillStyle;
- context.fillText(ts, gx - tsWidth, dimensions.height - 2);
- }
}
+ context.stroke();
}
// Horizontal (value) dividers.
for (var v = 1; v < chartOptions.grid.verticalSections; v++) {
- var gy = Math.round(v * dimensions.height / chartOptions.grid.verticalSections);
- if (chartOptions.grid.sharpLines) {
- gy -= 0.5;
- }
+ var gy = Util.pixelSnap(v * dimensions.height / chartOptions.grid.verticalSections, chartOptions.grid.lineWidth);
context.beginPath();
context.moveTo(0, gy);
context.lineTo(dimensions.width, gy);
context.stroke();
- context.closePath();
}
// Bounding rectangle.
if (chartOptions.grid.borderVisible) {
- context.beginPath();
context.strokeRect(0, 0, dimensions.width, dimensions.height);
- context.closePath();
}
context.restore();
if (chartOptions.horizontalLines && chartOptions.horizontalLines.length) {
for (var hl = 0; hl < chartOptions.horizontalLines.length; hl++) {
var line = chartOptions.horizontalLines[hl],
- hly = Math.round(valueToYPixel(line.value)) - 0.5;
+ lineWidth = line.lineWidth || 1,
+ hly = valueToYPosition(line.value, lineWidth);
context.strokeStyle = line.color || '#ffffff';
- context.lineWidth = line.lineWidth || 1;
+ context.lineWidth = lineWidth;
context.beginPath();
context.moveTo(0, hly);
context.lineTo(dimensions.width, hly);
context.stroke();
- context.closePath();
}
}
// For each data set...
for (var d = 0; d < this.seriesSet.length; d++) {
- context.save();
var timeSeries = this.seriesSet[d].timeSeries,
- dataSet = timeSeries.data,
- seriesOptions = this.seriesSet[d].options;
+ dataSet = timeSeries.data;
// Delete old data that's moved off the left of the chart.
timeSeries.dropOldData(oldestValidTime, chartOptions.maxDataSetLength);
+ if (dataSet.length <= 1 || timeSeries.disabled) {
+ continue;
+ }
+ context.save();
+
+ var seriesOptions = this.seriesSet[d].options,
+ // Keep in mind that `context.lineWidth = 0` doesn't actually set it to `0`.
+ drawStroke = seriesOptions.strokeStyle && seriesOptions.strokeStyle !== 'none',
+ lineWidthMaybeZero = drawStroke ? seriesOptions.lineWidth : 0;
- // Set style for this dataSet.
- context.lineWidth = seriesOptions.lineWidth;
- context.strokeStyle = seriesOptions.strokeStyle;
// Draw the line...
context.beginPath();
// Retain lastX, lastY for calculating the control points of bezier curves.
- var firstX = 0, lastX = 0, lastY = 0;
- for (var i = 0; i < dataSet.length && dataSet.length !== 1; i++) {
- var x = timeToXPixel(dataSet[i][0]),
- y = valueToYPixel(dataSet[i][1]);
-
- if (i === 0) {
- firstX = x;
- context.moveTo(x, y);
- } else {
- switch (chartOptions.interpolation) {
- case "linear":
- case "line": {
- context.lineTo(x,y);
- break;
- }
- case "bezier":
- default: {
- // Great explanation of Bezier curves: http://en.wikipedia.org/wiki/Bezier_curve#Quadratic_curves
- //
- // Assuming A was the last point in the line plotted and B is the new point,
- // we draw a curve with control points P and Q as below.
- //
- // A---P
- // |
- // |
- // |
- // Q---B
- //
- // Importantly, A and P are at the same y coordinate, as are B and Q. This is
- // so adjacent curves appear to flow as one.
- //
- context.bezierCurveTo( // startPoint (A) is implicit from last iteration of loop
- Math.round((lastX + x) / 2), lastY, // controlPoint1 (P)
- Math.round((lastX + x)) / 2, y, // controlPoint2 (Q)
- x, y); // endPoint (B)
- break;
- }
+ var firstX = timeToXPosition(dataSet[0][0], lineWidthMaybeZero),
+ firstY = valueToYPosition(dataSet[0][1], lineWidthMaybeZero),
+ lastX = firstX,
+ lastY = firstY,
+ draw;
+ context.moveTo(firstX, firstY);
+ switch (seriesOptions.interpolation || chartOptions.interpolation) {
+ case "linear":
+ case "line": {
+ draw = function(x, y, lastX, lastY) {
+ context.lineTo(x,y);
+ }
+ break;
+ }
+ case "bezier":
+ default: {
+ // Great explanation of Bezier curves: http://en.wikipedia.org/wiki/Bezier_curve#Quadratic_curves
+ //
+ // Assuming A was the last point in the line plotted and B is the new point,
+ // we draw a curve with control points P and Q as below.
+ //
+ // A---P
+ // |
+ // |
+ // |
+ // Q---B
+ //
+ // Importantly, A and P are at the same y coordinate, as are B and Q. This is
+ // so adjacent curves appear to flow as one.
+ //
+ draw = function(x, y, lastX, lastY) {
+ context.bezierCurveTo( // startPoint (A) is implicit from last iteration of loop
+ Math.round((lastX + x) / 2), lastY, // controlPoint1 (P)
+ Math.round((lastX + x)) / 2, y, // controlPoint2 (Q)
+ x, y); // endPoint (B)
}
+ break;
}
+ case "step": {
+ draw = function(x, y, lastX, lastY) {
+ context.lineTo(x,lastY);
+ context.lineTo(x,y);
+ }
+ break;
+ }
+ }
+ for (var i = 1; i < dataSet.length; i++) {
+ var iThData = dataSet[i],
+ x = timeToXPosition(iThData[0], lineWidthMaybeZero),
+ y = valueToYPosition(iThData[1], lineWidthMaybeZero);
+ draw(x, y, lastX, lastY);
lastX = x; lastY = y;
}
- if (dataSet.length > 1) {
- if (seriesOptions.fillStyle) {
- // Close up the fill region.
- context.lineTo(dimensions.width + seriesOptions.lineWidth + 1, lastY);
- context.lineTo(dimensions.width + seriesOptions.lineWidth + 1, dimensions.height + seriesOptions.lineWidth + 1);
- context.lineTo(firstX, dimensions.height + seriesOptions.lineWidth);
- context.fillStyle = seriesOptions.fillStyle;
- context.fill();
- }
+ if (drawStroke) {
+ context.lineWidth = seriesOptions.lineWidth;
+ context.strokeStyle = seriesOptions.strokeStyle;
+ context.stroke();
+ }
- if (seriesOptions.strokeStyle && seriesOptions.strokeStyle !== 'none') {
- context.stroke();
- }
- context.closePath();
+ if (seriesOptions.fillStyle) {
+ // Close up the fill region.
+ var fillEndY = seriesOptions.fillToBottom
+ ? dimensions.height + lineWidthMaybeZero + 1
+ : valueToYPosition(0, 0);
+ context.lineTo(lastX, fillEndY);
+ context.lineTo(firstX, fillEndY);
+
+ context.fillStyle = seriesOptions.fillStyle;
+ context.fill();
}
+
context.restore();
}
+ if (chartOptions.tooltip && this.mouseX >= 0) {
+ // Draw vertical bar to show tooltip position
+ context.lineWidth = chartOptions.tooltipLine.lineWidth;
+ context.strokeStyle = chartOptions.tooltipLine.strokeStyle;
+ context.beginPath();
+ context.moveTo(this.mouseX, 0);
+ context.lineTo(this.mouseX, dimensions.height);
+ context.stroke();
+ }
+ this.updateTooltip();
+
+ var labelsOptions = chartOptions.labels;
// Draw the axis values on the chart.
- if (!chartOptions.labels.disabled && !isNaN(this.valueRange.min) && !isNaN(this.valueRange.max)) {
- var maxValueString = parseFloat(this.valueRange.max).toFixed(chartOptions.labels.precision),
- minValueString = parseFloat(this.valueRange.min).toFixed(chartOptions.labels.precision);
- context.fillStyle = chartOptions.labels.fillStyle;
- context.fillText(maxValueString, 0 /* dimensions.width - context.measureText(maxValueString).width - 2 */, chartOptions.labels.fontSize);
- context.fillText(minValueString, 0 /* dimensions.width - context.measureText(minValueString).width - 2 */, dimensions.height - 2);
+ if (!labelsOptions.disabled && !isNaN(this.valueRange.min) && !isNaN(this.valueRange.max)) {
+ var maxValueString = chartOptions.yMaxFormatter(this.valueRange.max, labelsOptions.precision),
+ minValueString = chartOptions.yMinFormatter(this.valueRange.min, labelsOptions.precision),
+ maxLabelPos = chartOptions.scrollBackwards ? dimensions.width - context.measureText(maxValueString).width - 2 : 0,
+ minLabelPos = chartOptions.scrollBackwards ? dimensions.width - context.measureText(minValueString).width - 2 : 0;
+ context.fillStyle = labelsOptions.fillStyle;
+ context.fillText(maxValueString, maxLabelPos, labelsOptions.fontSize);
+ context.fillText(minValueString, minLabelPos, dimensions.height - 2);
+ }
+
+ // Display intermediate y axis labels along y-axis to the left of the chart
+ if ( labelsOptions.showIntermediateLabels
+ && !isNaN(this.valueRange.min) && !isNaN(this.valueRange.max)
+ && chartOptions.grid.verticalSections > 0) {
+ // show a label above every vertical section divider
+ var step = (this.valueRange.max - this.valueRange.min) / chartOptions.grid.verticalSections;
+ var stepPixels = dimensions.height / chartOptions.grid.verticalSections;
+ for (var v = 1; v < chartOptions.grid.verticalSections; v++) {
+ var gy = dimensions.height - Math.round(v * stepPixels),
+ yValue = chartOptions.yIntermediateFormatter(this.valueRange.min + (v * step), labelsOptions.precision),
+ //left of right axis?
+ intermediateLabelPos =
+ labelsOptions.intermediateLabelSameAxis
+ ? (chartOptions.scrollBackwards ? 0 : dimensions.width - context.measureText(yValue).width - 2)
+ : (chartOptions.scrollBackwards ? dimensions.width - context.measureText(yValue).width - 2 : 0);
+
+ context.fillText(yValue, intermediateLabelPos, gy - chartOptions.grid.lineWidth);
+ }
+ }
+
+ // Display timestamps along x-axis at the bottom of the chart.
+ if (chartOptions.timestampFormatter && chartOptions.grid.millisPerLine > 0) {
+ var textUntilX = chartOptions.scrollBackwards
+ ? context.measureText(minValueString).width
+ : dimensions.width - context.measureText(minValueString).width + 4;
+ for (var t = time - (time % chartOptions.grid.millisPerLine);
+ t >= oldestValidTime;
+ t -= chartOptions.grid.millisPerLine) {
+ var gx = timeToXPosition(t, 0);
+ // Only draw the timestamp if it won't overlap with the previously drawn one.
+ if ((!chartOptions.scrollBackwards && gx < textUntilX) || (chartOptions.scrollBackwards && gx > textUntilX)) {
+ // Formats the timestamp based on user specified formatting function
+ // SmoothieChart.timeFormatter function above is one such formatting option
+ var tx = new Date(t),
+ ts = chartOptions.timestampFormatter(tx),
+ tsWidth = context.measureText(ts).width;
+
+ textUntilX = chartOptions.scrollBackwards
+ ? gx + tsWidth + 2
+ : gx - tsWidth - 2;
+
+ context.fillStyle = chartOptions.labels.fillStyle;
+ if(chartOptions.scrollBackwards) {
+ context.fillText(ts, gx, dimensions.height - 2);
+ } else {
+ context.fillText(ts, gx - tsWidth, dimensions.height - 2);
+ }
+ }
+ }
+ }
+
+ // Display title.
+ if (chartOptions.title.text !== '') {
+ context.font = chartOptions.title.fontSize + 'px ' + chartOptions.title.fontFamily;
+ var titleXPos = chartOptions.scrollBackwards ? dimensions.width - context.measureText(chartOptions.title.text).width - 2 : 2;
+ if (chartOptions.title.verticalAlign == 'bottom') {
+ context.textBaseline = 'bottom';
+ var titleYPos = dimensions.height;
+ } else if (chartOptions.title.verticalAlign == 'middle') {
+ context.textBaseline = 'middle';
+ var titleYPos = dimensions.height / 2;
+ } else {
+ context.textBaseline = 'top';
+ var titleYPos = 0;
+ }
+ context.fillStyle = chartOptions.title.fillStyle;
+ context.fillText(chartOptions.title.text, titleXPos, titleYPos);
}
context.restore(); // See .save() above.
exports.SmoothieChart = SmoothieChart;
})(typeof exports === 'undefined' ? this : exports);
-
projects / thirdparty / tvheadend.git / commitdiff
