##// END OF EJS Templates
rhodecode-enterprise-ce
RSS
vcs: Remove custom response header which contains backend key....
vcs: Remove custom response header which contains backend key. We used this custom header to skip the error handling. This is no linger needed since the VCS middleware is moved above of the error handling.
marcink - - Load All Authors

File last commit:

r1:854a839a default
r950:21c331ba default
Show More
jquery.flot.js
3168 lines | 120.1 KiB | application/javascript | JavascriptLexer
/ rhodecode / public / js / jquery.flot.js
History | Annotation | Raw |Copy content |Copy permalink
/* Javascript plotting library for jQuery, version 0.8.3.
Copyright (c) 2007-2014 IOLA and Ole Laursen.
Licensed under the MIT license.
*/
// first an inline dependency, jquery.colorhelpers.js, we inline it here
// for convenience
/* Plugin for jQuery for working with colors.
*
* Version 1.1.
*
* Inspiration from jQuery color animation plugin by John Resig.
*
* Released under the MIT license by Ole Laursen, October 2009.
*
* Examples:
*
* $.color.parse("#fff").scale('rgb', 0.25).add('a', -0.5).toString()
* var c = $.color.extract($("#mydiv"), 'background-color');
* console.log(c.r, c.g, c.b, c.a);
* $.color.make(100, 50, 25, 0.4).toString() // returns "rgba(100,50,25,0.4)"
*
* Note that .scale() and .add() return the same modified object
* instead of making a new one.
*
* V. 1.1: Fix error handling so e.g. parsing an empty string does
* produce a color rather than just crashing.
*/
(function($){$.color={};$.color.make=function(r,g,b,a){var o={};o.r=r||0;o.g=g||0;o.b=b||0;o.a=a!=null?a:1;o.add=function(c,d){for(var i=0;i<c.length;++i)o[c.charAt(i)]+=d;return o.normalize()};o.scale=function(c,f){for(var i=0;i<c.length;++i)o[c.charAt(i)]*=f;return o.normalize()};o.toString=function(){if(o.a>=1){return"rgb("+[o.r,o.g,o.b].join(",")+")"}else{return"rgba("+[o.r,o.g,o.b,o.a].join(",")+")"}};o.normalize=function(){function clamp(min,value,max){return value<min?min:value>max?max:value}o.r=clamp(0,parseInt(o.r),255);o.g=clamp(0,parseInt(o.g),255);o.b=clamp(0,parseInt(o.b),255);o.a=clamp(0,o.a,1);return o};o.clone=function(){return $.color.make(o.r,o.b,o.g,o.a)};return o.normalize()};$.color.extract=function(elem,css){var c;do{c=elem.css(css).toLowerCase();if(c!=""&&c!="transparent")break;elem=elem.parent()}while(elem.length&&!$.nodeName(elem.get(0),"body"));if(c=="rgba(0, 0, 0, 0)")c="transparent";return $.color.parse(c)};$.color.parse=function(str){var res,m=$.color.make;if(res=/rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str))return m(parseInt(res[1],10),parseInt(res[2],10),parseInt(res[3],10));if(res=/rgba\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str))return m(parseInt(res[1],10),parseInt(res[2],10),parseInt(res[3],10),parseFloat(res[4]));if(res=/rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(str))return m(parseFloat(res[1])*2.55,parseFloat(res[2])*2.55,parseFloat(res[3])*2.55);if(res=/rgba\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\s*\)/.exec(str))return m(parseFloat(res[1])*2.55,parseFloat(res[2])*2.55,parseFloat(res[3])*2.55,parseFloat(res[4]));if(res=/#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str))return m(parseInt(res[1],16),parseInt(res[2],16),parseInt(res[3],16));if(res=/#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str))return m(parseInt(res[1]+res[1],16),parseInt(res[2]+res[2],16),parseInt(res[3]+res[3],16));var name=$.trim(str).toLowerCase();if(name=="transparent")return m(255,255,255,0);else{res=lookupColors[name]||[0,0,0];return m(res[0],res[1],res[2])}};var lookupColors={aqua:[0,255,255],azure:[240,255,255],beige:[245,245,220],black:[0,0,0],blue:[0,0,255],brown:[165,42,42],cyan:[0,255,255],darkblue:[0,0,139],darkcyan:[0,139,139],darkgrey:[169,169,169],darkgreen:[0,100,0],darkkhaki:[189,183,107],darkmagenta:[139,0,139],darkolivegreen:[85,107,47],darkorange:[255,140,0],darkorchid:[153,50,204],darkred:[139,0,0],darksalmon:[233,150,122],darkviolet:[148,0,211],fuchsia:[255,0,255],gold:[255,215,0],green:[0,128,0],indigo:[75,0,130],khaki:[240,230,140],lightblue:[173,216,230],lightcyan:[224,255,255],lightgreen:[144,238,144],lightgrey:[211,211,211],lightpink:[255,182,193],lightyellow:[255,255,224],lime:[0,255,0],magenta:[255,0,255],maroon:[128,0,0],navy:[0,0,128],olive:[128,128,0],orange:[255,165,0],pink:[255,192,203],purple:[128,0,128],violet:[128,0,128],red:[255,0,0],silver:[192,192,192],white:[255,255,255],yellow:[255,255,0]}})(jQuery);
// the actual Flot code
(function($) {
// Cache the prototype hasOwnProperty for faster access
var hasOwnProperty = Object.prototype.hasOwnProperty;
// A shim to provide 'detach' to jQuery versions prior to 1.4. Using a DOM
// operation produces the same effect as detach, i.e. removing the element
// without touching its jQuery data.
// Do not merge this into Flot 0.9, since it requires jQuery 1.4.4+.
if (!$.fn.detach) {
$.fn.detach = function() {
return this.each(function() {
if (this.parentNode) {
this.parentNode.removeChild( this );
}
});
};
}
///////////////////////////////////////////////////////////////////////////
// The Canvas object is a wrapper around an HTML5 <canvas> tag.
//
// @constructor
// @param {string} cls List of classes to apply to the canvas.
// @param {element} container Element onto which to append the canvas.
//
// Requiring a container is a little iffy, but unfortunately canvas
// operations don't work unless the canvas is attached to the DOM.
function Canvas(cls, container) {
var element = container.children("." + cls)[0];
if (element == null) {
element = document.createElement("canvas");
element.className = cls;
$(element).css({ direction: "ltr", position: "absolute", left: 0, top: 0 })
.appendTo(container);
// If HTML5 Canvas isn't available, fall back to [Ex|Flash]canvas
if (!element.getContext) {
if (window.G_vmlCanvasManager) {
element = window.G_vmlCanvasManager.initElement(element);
} else {
throw new Error("Canvas is not available. If you're using IE with a fall-back such as Excanvas, then there's either a mistake in your conditional include, or the page has no DOCTYPE and is rendering in Quirks Mode.");
}
}
}
this.element = element;
var context = this.context = element.getContext("2d");
// Determine the screen's ratio of physical to device-independent
// pixels. This is the ratio between the canvas width that the browser
// advertises and the number of pixels actually present in that space.
// The iPhone 4, for example, has a device-independent width of 320px,
// but its screen is actually 640px wide. It therefore has a pixel
// ratio of 2, while most normal devices have a ratio of 1.
var devicePixelRatio = window.devicePixelRatio || 1,
backingStoreRatio =
context.webkitBackingStorePixelRatio ||
context.mozBackingStorePixelRatio ||
context.msBackingStorePixelRatio ||
context.oBackingStorePixelRatio ||
context.backingStorePixelRatio || 1;
this.pixelRatio = devicePixelRatio / backingStoreRatio;
// Size the canvas to match the internal dimensions of its container
this.resize(container.width(), container.height());
// Collection of HTML div layers for text overlaid onto the canvas
this.textContainer = null;
this.text = {};
// Cache of text fragments and metrics, so we can avoid expensively
// re-calculating them when the plot is re-rendered in a loop.
this._textCache = {};
}
// Resizes the canvas to the given dimensions.
//
// @param {number} width New width of the canvas, in pixels.
// @param {number} width New height of the canvas, in pixels.
Canvas.prototype.resize = function(width, height) {
if (width <= 0 || height <= 0) {
throw new Error("Invalid dimensions for plot, width = " + width + ", height = " + height);
}
var element = this.element,
context = this.context,
pixelRatio = this.pixelRatio;
// Resize the canvas, increasing its density based on the display's
// pixel ratio; basically giving it more pixels without increasing the
// size of its element, to take advantage of the fact that retina
// displays have that many more pixels in the same advertised space.
// Resizing should reset the state (excanvas seems to be buggy though)
if (this.width != width) {
element.width = width * pixelRatio;
element.style.width = width + "px";
this.width = width;
}
if (this.height != height) {
element.height = height * pixelRatio;
element.style.height = height + "px";
this.height = height;
}
// Save the context, so we can reset in case we get replotted. The
// restore ensure that we're really back at the initial state, and
// should be safe even if we haven't saved the initial state yet.
context.restore();
context.save();
// Scale the coordinate space to match the display density; so even though we
// may have twice as many pixels, we still want lines and other drawing to
// appear at the same size; the extra pixels will just make them crisper.
context.scale(pixelRatio, pixelRatio);
};
// Clears the entire canvas area, not including any overlaid HTML text
Canvas.prototype.clear = function() {
this.context.clearRect(0, 0, this.width, this.height);
};
// Finishes rendering the canvas, including managing the text overlay.
Canvas.prototype.render = function() {
var cache = this._textCache;
// For each text layer, add elements marked as active that haven't
// already been rendered, and remove those that are no longer active.
for (var layerKey in cache) {
if (hasOwnProperty.call(cache, layerKey)) {
var layer = this.getTextLayer(layerKey),
layerCache = cache[layerKey];
layer.hide();
for (var styleKey in layerCache) {
if (hasOwnProperty.call(layerCache, styleKey)) {
var styleCache = layerCache[styleKey];
for (var key in styleCache) {
if (hasOwnProperty.call(styleCache, key)) {
var positions = styleCache[key].positions;
for (var i = 0, position; position = positions[i]; i++) {
if (position.active) {
if (!position.rendered) {
layer.append(position.element);
position.rendered = true;
}
} else {
positions.splice(i--, 1);
if (position.rendered) {
position.element.detach();
}
}
}
if (positions.length == 0) {
delete styleCache[key];
}
}
}
}
}
layer.show();
}
}
};
// Creates (if necessary) and returns the text overlay container.
//
// @param {string} classes String of space-separated CSS classes used to
// uniquely identify the text layer.
// @return {object} The jQuery-wrapped text-layer div.
Canvas.prototype.getTextLayer = function(classes) {
var layer = this.text[classes];
// Create the text layer if it doesn't exist
if (layer == null) {
// Create the text layer container, if it doesn't exist
if (this.textContainer == null) {
this.textContainer = $("<div class='flot-text'></div>")
.css({
position: "absolute",
top: 0,
left: 0,
bottom: 0,
right: 0,
'font-size': "smaller",
color: "#545454"
})
.insertAfter(this.element);
}
layer = this.text[classes] = $("<div></div>")
.addClass(classes)
.css({
position: "absolute",
top: 0,
left: 0,
bottom: 0,
right: 0
})
.appendTo(this.textContainer);
}
return layer;
};
// Creates (if necessary) and returns a text info object.
//
// The object looks like this:
//
// {
// width: Width of the text's wrapper div.
// height: Height of the text's wrapper div.
// element: The jQuery-wrapped HTML div containing the text.
// positions: Array of positions at which this text is drawn.
// }
//
// The positions array contains objects that look like this:
//
// {
// active: Flag indicating whether the text should be visible.
// rendered: Flag indicating whether the text is currently visible.
// element: The jQuery-wrapped HTML div containing the text.
// x: X coordinate at which to draw the text.
// y: Y coordinate at which to draw the text.
// }
//
// Each position after the first receives a clone of the original element.
//
// The idea is that that the width, height, and general 'identity' of the
// text is constant no matter where it is placed; the placements are a
// secondary property.
//
// Canvas maintains a cache of recently-used text info objects; getTextInfo
// either returns the cached element or creates a new entry.
//
// @param {string} layer A string of space-separated CSS classes uniquely
// identifying the layer containing this text.
// @param {string} text Text string to retrieve info for.
// @param {(string|object)=} font Either a string of space-separated CSS
// classes or a font-spec object, defining the text's font and style.
// @param {number=} angle Angle at which to rotate the text, in degrees.
// Angle is currently unused, it will be implemented in the future.
// @param {number=} width Maximum width of the text before it wraps.
// @return {object} a text info object.
Canvas.prototype.getTextInfo = function(layer, text, font, angle, width) {
var textStyle, layerCache, styleCache, info;
// Cast the value to a string, in case we were given a number or such
text = "" + text;
// If the font is a font-spec object, generate a CSS font definition
if (typeof font === "object") {
textStyle = font.style + " " + font.variant + " " + font.weight + " " + font.size + "px/" + font.lineHeight + "px " + font.family;
} else {
textStyle = font;
}
// Retrieve (or create) the cache for the text's layer and styles
layerCache = this._textCache[layer];
if (layerCache == null) {
layerCache = this._textCache[layer] = {};
}
styleCache = layerCache[textStyle];
if (styleCache == null) {
styleCache = layerCache[textStyle] = {};
}
info = styleCache[text];
// If we can't find a matching element in our cache, create a new one
if (info == null) {
var element = $("<div></div>").html(text)
.css({
position: "absolute",
'max-width': width,
top: -9999
})
.appendTo(this.getTextLayer(layer));
if (typeof font === "object") {
element.css({
font: textStyle,
color: font.color
});
} else if (typeof font === "string") {
element.addClass(font);
}
info = styleCache[text] = {
width: element.outerWidth(true),
height: element.outerHeight(true),
element: element,
positions: []
};
element.detach();
}
return info;
};
// Adds a text string to the canvas text overlay.
//
// The text isn't drawn immediately; it is marked as rendering, which will
// result in its addition to the canvas on the next render pass.
//
// @param {string} layer A string of space-separated CSS classes uniquely
// identifying the layer containing this text.
// @param {number} x X coordinate at which to draw the text.
// @param {number} y Y coordinate at which to draw the text.
// @param {string} text Text string to draw.
// @param {(string|object)=} font Either a string of space-separated CSS
// classes or a font-spec object, defining the text's font and style.
// @param {number=} angle Angle at which to rotate the text, in degrees.
// Angle is currently unused, it will be implemented in the future.
// @param {number=} width Maximum width of the text before it wraps.
// @param {string=} halign Horizontal alignment of the text; either "left",
// "center" or "right".
// @param {string=} valign Vertical alignment of the text; either "top",
// "middle" or "bottom".
Canvas.prototype.addText = function(layer, x, y, text, font, angle, width, halign, valign) {
var info = this.getTextInfo(layer, text, font, angle, width),
positions = info.positions;
// Tweak the div's position to match the text's alignment
if (halign == "center") {
x -= info.width / 2;
} else if (halign == "right") {
x -= info.width;
}
if (valign == "middle") {
y -= info.height / 2;
} else if (valign == "bottom") {
y -= info.height;
}
// Determine whether this text already exists at this position.
// If so, mark it for inclusion in the next render pass.
for (var i = 0, position; position = positions[i]; i++) {
if (position.x == x && position.y == y) {
position.active = true;
return;
}
}
// If the text doesn't exist at this position, create a new entry
// For the very first position we'll re-use the original element,
// while for subsequent ones we'll clone it.
position = {
active: true,
rendered: false,
element: positions.length ? info.element.clone() : info.element,
x: x,
y: y
};
positions.push(position);
// Move the element to its final position within the container
position.element.css({
top: Math.round(y),
left: Math.round(x),
'text-align': halign // In case the text wraps
});
};
// Removes one or more text strings from the canvas text overlay.
//
// If no parameters are given, all text within the layer is removed.
//
// Note that the text is not immediately removed; it is simply marked as
// inactive, which will result in its removal on the next render pass.
// This avoids the performance penalty for 'clear and redraw' behavior,
// where we potentially get rid of all text on a layer, but will likely
// add back most or all of it later, as when redrawing axes, for example.
//
// @param {string} layer A string of space-separated CSS classes uniquely
// identifying the layer containing this text.
// @param {number=} x X coordinate of the text.
// @param {number=} y Y coordinate of the text.
// @param {string=} text Text string to remove.
// @param {(string|object)=} font Either a string of space-separated CSS
// classes or a font-spec object, defining the text's font and style.
// @param {number=} angle Angle at which the text is rotated, in degrees.
// Angle is currently unused, it will be implemented in the future.
Canvas.prototype.removeText = function(layer, x, y, text, font, angle) {
if (text == null) {
var layerCache = this._textCache[layer];
if (layerCache != null) {
for (var styleKey in layerCache) {
if (hasOwnProperty.call(layerCache, styleKey)) {
var styleCache = layerCache[styleKey];
for (var key in styleCache) {
if (hasOwnProperty.call(styleCache, key)) {
var positions = styleCache[key].positions;
for (var i = 0, position; position = positions[i]; i++) {
position.active = false;
}
}
}
}
}
}
} else {
var positions = this.getTextInfo(layer, text, font, angle).positions;
for (var i = 0, position; position = positions[i]; i++) {
if (position.x == x && position.y == y) {
position.active = false;
}
}
}
};
///////////////////////////////////////////////////////////////////////////
// The top-level container for the entire plot.
function Plot(placeholder, data_, options_, plugins) {
// data is on the form:
// [ series1, series2 ... ]
// where series is either just the data as [ [x1, y1], [x2, y2], ... ]
// or { data: [ [x1, y1], [x2, y2], ... ], label: "some label", ... }
var series = [],
options = {
// the color theme used for graphs
colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"],
legend: {
show: true,
noColumns: 1, // number of colums in legend table
labelFormatter: null, // fn: string -> string
labelBoxBorderColor: "#ccc", // border color for the little label boxes
container: null, // container (as jQuery object) to put legend in, null means default on top of graph
position: "ne", // position of default legend container within plot
margin: 5, // distance from grid edge to default legend container within plot
backgroundColor: null, // null means auto-detect
backgroundOpacity: 0.85, // set to 0 to avoid background
sorted: null // default to no legend sorting
},
xaxis: {
show: null, // null = auto-detect, true = always, false = never
position: "bottom", // or "top"
mode: null, // null or "time"
font: null, // null (derived from CSS in placeholder) or object like { size: 11, lineHeight: 13, style: "italic", weight: "bold", family: "sans-serif", variant: "small-caps" }
color: null, // base color, labels, ticks
tickColor: null, // possibly different color of ticks, e.g. "rgba(0,0,0,0.15)"
transform: null, // null or f: number -> number to transform axis
inverseTransform: null, // if transform is set, this should be the inverse function
min: null, // min. value to show, null means set automatically
max: null, // max. value to show, null means set automatically
autoscaleMargin: null, // margin in % to add if auto-setting min/max
ticks: null, // either [1, 3] or [[1, "a"], 3] or (fn: axis info -> ticks) or app. number of ticks for auto-ticks
tickFormatter: null, // fn: number -> string
labelWidth: null, // size of tick labels in pixels
labelHeight: null,
reserveSpace: null, // whether to reserve space even if axis isn't shown
tickLength: null, // size in pixels of ticks, or "full" for whole line
alignTicksWithAxis: null, // axis number or null for no sync
tickDecimals: null, // no. of decimals, null means auto
tickSize: null, // number or [number, "unit"]
minTickSize: null // number or [number, "unit"]
},
yaxis: {
autoscaleMargin: 0.02,
position: "left" // or "right"
},
xaxes: [],
yaxes: [],
series: {
points: {
show: false,
radius: 3,
lineWidth: 2, // in pixels
fill: true,
fillColor: "#ffffff",
symbol: "circle" // or callback
},
lines: {
// we don't put in show: false so we can see
// whether lines were actively disabled
lineWidth: 2, // in pixels
fill: false,
fillColor: null,
steps: false
// Omit 'zero', so we can later default its value to
// match that of the 'fill' option.
},
bars: {
show: false,
lineWidth: 2, // in pixels
barWidth: 1, // in units of the x axis
fill: true,
fillColor: null,
align: "left", // "left", "right", or "center"
horizontal: false,
zero: true
},
shadowSize: 3,
highlightColor: null
},
grid: {
show: true,
aboveData: false,
color: "#545454", // primary color used for outline and labels
backgroundColor: null, // null for transparent, else color
borderColor: null, // set if different from the grid color
tickColor: null, // color for the ticks, e.g. "rgba(0,0,0,0.15)"
margin: 0, // distance from the canvas edge to the grid
labelMargin: 5, // in pixels
axisMargin: 8, // in pixels
borderWidth: 2, // in pixels
minBorderMargin: null, // in pixels, null means taken from points radius
markings: null, // array of ranges or fn: axes -> array of ranges
markingsColor: "#f4f4f4",
markingsLineWidth: 2,
// interactive stuff
clickable: false,
hoverable: false,
autoHighlight: true, // highlight in case mouse is near
mouseActiveRadius: 10 // how far the mouse can be away to activate an item
},
interaction: {
redrawOverlayInterval: 1000/60 // time between updates, -1 means in same flow
},
hooks: {}
},
surface = null, // the canvas for the plot itself
overlay = null, // canvas for interactive stuff on top of plot
eventHolder = null, // jQuery object that events should be bound to
ctx = null, octx = null,
xaxes = [], yaxes = [],
plotOffset = { left: 0, right: 0, top: 0, bottom: 0},
plotWidth = 0, plotHeight = 0,
hooks = {
processOptions: [],
processRawData: [],
processDatapoints: [],
processOffset: [],
drawBackground: [],
drawSeries: [],
draw: [],
bindEvents: [],
drawOverlay: [],
shutdown: []
},
plot = this;
// public functions
plot.setData = setData;
plot.setupGrid = setupGrid;
plot.draw = draw;
plot.getPlaceholder = function() { return placeholder; };
plot.getCanvas = function() { return surface.element; };
plot.getPlotOffset = function() { return plotOffset; };
plot.width = function () { return plotWidth; };
plot.height = function () { return plotHeight; };
plot.offset = function () {
var o = eventHolder.offset();
o.left += plotOffset.left;
o.top += plotOffset.top;
return o;
};
plot.getData = function () { return series; };
plot.getAxes = function () {
var res = {}, i;
$.each(xaxes.concat(yaxes), function (_, axis) {
if (axis)
res[axis.direction + (axis.n != 1 ? axis.n : "") + "axis"] = axis;
});
return res;
};
plot.getXAxes = function () { return xaxes; };
plot.getYAxes = function () { return yaxes; };
plot.c2p = canvasToAxisCoords;
plot.p2c = axisToCanvasCoords;
plot.getOptions = function () { return options; };
plot.highlight = highlight;
plot.unhighlight = unhighlight;
plot.triggerRedrawOverlay = triggerRedrawOverlay;
plot.pointOffset = function(point) {
return {
left: parseInt(xaxes[axisNumber(point, "x") - 1].p2c(+point.x) + plotOffset.left, 10),
top: parseInt(yaxes[axisNumber(point, "y") - 1].p2c(+point.y) + plotOffset.top, 10)
};
};
plot.shutdown = shutdown;
plot.destroy = function () {
shutdown();
placeholder.removeData("plot").empty();
series = [];
options = null;
surface = null;
overlay = null;
eventHolder = null;
ctx = null;
octx = null;
xaxes = [];
yaxes = [];
hooks = null;
highlights = [];
plot = null;
};
plot.resize = function () {
var width = placeholder.width(),
height = placeholder.height();
surface.resize(width, height);
overlay.resize(width, height);
};
// public attributes
plot.hooks = hooks;
// initialize
initPlugins(plot);
parseOptions(options_);
setupCanvases();
setData(data_);
setupGrid();
draw();
bindEvents();
function executeHooks(hook, args) {
args = [plot].concat(args);
for (var i = 0; i < hook.length; ++i)
hook[i].apply(this, args);
}
function initPlugins() {
// References to key classes, allowing plugins to modify them
var classes = {
Canvas: Canvas
};
for (var i = 0; i < plugins.length; ++i) {
var p = plugins[i];
p.init(plot, classes);
if (p.options)
$.extend(true, options, p.options);
}
}
function parseOptions(opts) {
$.extend(true, options, opts);
// $.extend merges arrays, rather than replacing them. When less
// colors are provided than the size of the default palette, we
// end up with those colors plus the remaining defaults, which is
// not expected behavior; avoid it by replacing them here.
if (opts && opts.colors) {
options.colors = opts.colors;
}
if (options.xaxis.color == null)
options.xaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString();
if (options.yaxis.color == null)
options.yaxis.color = $.color.parse(options.grid.color).scale('a', 0.22).toString();
if (options.xaxis.tickColor == null) // grid.tickColor for back-compatibility
options.xaxis.tickColor = options.grid.tickColor || options.xaxis.color;
if (options.yaxis.tickColor == null) // grid.tickColor for back-compatibility
options.yaxis.tickColor = options.grid.tickColor || options.yaxis.color;
if (options.grid.borderColor == null)
options.grid.borderColor = options.grid.color;
if (options.grid.tickColor == null)
options.grid.tickColor = $.color.parse(options.grid.color).scale('a', 0.22).toString();
// Fill in defaults for axis options, including any unspecified
// font-spec fields, if a font-spec was provided.
// If no x/y axis options were provided, create one of each anyway,
// since the rest of the code assumes that they exist.
var i, axisOptions, axisCount,
fontSize = placeholder.css("font-size"),
fontSizeDefault = fontSize ? +fontSize.replace("px", "") : 13,
fontDefaults = {
style: placeholder.css("font-style"),
size: Math.round(0.8 * fontSizeDefault),
variant: placeholder.css("font-variant"),
weight: placeholder.css("font-weight"),
family: placeholder.css("font-family")
};
axisCount = options.xaxes.length || 1;
for (i = 0; i < axisCount; ++i) {
axisOptions = options.xaxes[i];
if (axisOptions && !axisOptions.tickColor) {
axisOptions.tickColor = axisOptions.color;
}
axisOptions = $.extend(true, {}, options.xaxis, axisOptions);
options.xaxes[i] = axisOptions;
if (axisOptions.font) {
axisOptions.font = $.extend({}, fontDefaults, axisOptions.font);
if (!axisOptions.font.color) {
axisOptions.font.color = axisOptions.color;
}
if (!axisOptions.font.lineHeight) {
axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15);
}
}
}
axisCount = options.yaxes.length || 1;
for (i = 0; i < axisCount; ++i) {
axisOptions = options.yaxes[i];
if (axisOptions && !axisOptions.tickColor) {
axisOptions.tickColor = axisOptions.color;
}
axisOptions = $.extend(true, {}, options.yaxis, axisOptions);
options.yaxes[i] = axisOptions;
if (axisOptions.font) {
axisOptions.font = $.extend({}, fontDefaults, axisOptions.font);
if (!axisOptions.font.color) {
axisOptions.font.color = axisOptions.color;
}
if (!axisOptions.font.lineHeight) {
axisOptions.font.lineHeight = Math.round(axisOptions.font.size * 1.15);
}
}
}
// backwards compatibility, to be removed in future
if (options.xaxis.noTicks && options.xaxis.ticks == null)
options.xaxis.ticks = options.xaxis.noTicks;
if (options.yaxis.noTicks && options.yaxis.ticks == null)
options.yaxis.ticks = options.yaxis.noTicks;
if (options.x2axis) {
options.xaxes[1] = $.extend(true, {}, options.xaxis, options.x2axis);
options.xaxes[1].position = "top";
// Override the inherit to allow the axis to auto-scale
if (options.x2axis.min == null) {
options.xaxes[1].min = null;
}
if (options.x2axis.max == null) {
options.xaxes[1].max = null;
}
}
if (options.y2axis) {
options.yaxes[1] = $.extend(true, {}, options.yaxis, options.y2axis);
options.yaxes[1].position = "right";
// Override the inherit to allow the axis to auto-scale
if (options.y2axis.min == null) {
options.yaxes[1].min = null;
}
if (options.y2axis.max == null) {
options.yaxes[1].max = null;
}
}
if (options.grid.coloredAreas)
options.grid.markings = options.grid.coloredAreas;
if (options.grid.coloredAreasColor)
options.grid.markingsColor = options.grid.coloredAreasColor;
if (options.lines)
$.extend(true, options.series.lines, options.lines);
if (options.points)
$.extend(true, options.series.points, options.points);
if (options.bars)
$.extend(true, options.series.bars, options.bars);
if (options.shadowSize != null)
options.series.shadowSize = options.shadowSize;
if (options.highlightColor != null)
options.series.highlightColor = options.highlightColor;
// save options on axes for future reference
for (i = 0; i < options.xaxes.length; ++i)
getOrCreateAxis(xaxes, i + 1).options = options.xaxes[i];
for (i = 0; i < options.yaxes.length; ++i)
getOrCreateAxis(yaxes, i + 1).options = options.yaxes[i];
// add hooks from options
for (var n in hooks)
if (options.hooks[n] && options.hooks[n].length)
hooks[n] = hooks[n].concat(options.hooks[n]);
executeHooks(hooks.processOptions, [options]);
}
function setData(d) {
series = parseData(d);
fillInSeriesOptions();
processData();
}
function parseData(d) {
var res = [];
for (var i = 0; i < d.length; ++i) {
var s = $.extend(true, {}, options.series);
if (d[i].data != null) {
s.data = d[i].data; // move the data instead of deep-copy
delete d[i].data;
$.extend(true, s, d[i]);
d[i].data = s.data;
}
else
s.data = d[i];
res.push(s);
}
return res;
}
function axisNumber(obj, coord) {
var a = obj[coord + "axis"];
if (typeof a == "object") // if we got a real axis, extract number
a = a.n;
if (typeof a != "number")
a = 1; // default to first axis
return a;
}
function allAxes() {
// return flat array without annoying null entries
return $.grep(xaxes.concat(yaxes), function (a) { return a; });
}
function canvasToAxisCoords(pos) {
// return an object with x/y corresponding to all used axes
var res = {}, i, axis;
for (i = 0; i < xaxes.length; ++i) {
axis = xaxes[i];
if (axis && axis.used)
res["x" + axis.n] = axis.c2p(pos.left);
}
for (i = 0; i < yaxes.length; ++i) {
axis = yaxes[i];
if (axis && axis.used)
res["y" + axis.n] = axis.c2p(pos.top);
}
if (res.x1 !== undefined)
res.x = res.x1;
if (res.y1 !== undefined)
res.y = res.y1;
return res;
}
function axisToCanvasCoords(pos) {
// get canvas coords from the first pair of x/y found in pos
var res = {}, i, axis, key;
for (i = 0; i < xaxes.length; ++i) {
axis = xaxes[i];
if (axis && axis.used) {
key = "x" + axis.n;
if (pos[key] == null && axis.n == 1)
key = "x";
if (pos[key] != null) {
res.left = axis.p2c(pos[key]);
break;
}
}
}
for (i = 0; i < yaxes.length; ++i) {
axis = yaxes[i];
if (axis && axis.used) {
key = "y" + axis.n;
if (pos[key] == null && axis.n == 1)
key = "y";
if (pos[key] != null) {
res.top = axis.p2c(pos[key]);
break;
}
}
}
return res;
}
function getOrCreateAxis(axes, number) {
if (!axes[number - 1])
axes[number - 1] = {
n: number, // save the number for future reference
direction: axes == xaxes ? "x" : "y",
options: $.extend(true, {}, axes == xaxes ? options.xaxis : options.yaxis)
};
return axes[number - 1];
}
function fillInSeriesOptions() {
var neededColors = series.length, maxIndex = -1, i;
// Subtract the number of series that already have fixed colors or
// color indexes from the number that we still need to generate.
for (i = 0; i < series.length; ++i) {
var sc = series[i].color;
if (sc != null) {
neededColors--;
if (typeof sc == "number" && sc > maxIndex) {
maxIndex = sc;
}
}
}
// If any of the series have fixed color indexes, then we need to
// generate at least as many colors as the highest index.
if (neededColors <= maxIndex) {
neededColors = maxIndex + 1;
}
// Generate all the colors, using first the option colors and then
// variations on those colors once they're exhausted.
var c, colors = [], colorPool = options.colors,
colorPoolSize = colorPool.length, variation = 0;
for (i = 0; i < neededColors; i++) {
c = $.color.parse(colorPool[i % colorPoolSize] || "#666");
// Each time we exhaust the colors in the pool we adjust
// a scaling factor used to produce more variations on
// those colors. The factor alternates negative/positive
// to produce lighter/darker colors.
// Reset the variation after every few cycles, or else
// it will end up producing only white or black colors.
if (i % colorPoolSize == 0 && i) {
if (variation >= 0) {
if (variation < 0.5) {
variation = -variation - 0.2;
} else variation = 0;
} else variation = -variation;
}
colors[i] = c.scale('rgb', 1 + variation);
}
// Finalize the series options, filling in their colors
var colori = 0, s;
for (i = 0; i < series.length; ++i) {
s = series[i];
// assign colors
if (s.color == null) {
s.color = colors[colori].toString();
++colori;
}
else if (typeof s.color == "number")
s.color = colors[s.color].toString();
// turn on lines automatically in case nothing is set
if (s.lines.show == null) {
var v, show = true;
for (v in s)
if (s[v] && s[v].show) {
show = false;
break;
}
if (show)
s.lines.show = true;
}
// If nothing was provided for lines.zero, default it to match
// lines.fill, since areas by default should extend to zero.
if (s.lines.zero == null) {
s.lines.zero = !!s.lines.fill;
}
// setup axes
s.xaxis = getOrCreateAxis(xaxes, axisNumber(s, "x"));
s.yaxis = getOrCreateAxis(yaxes, axisNumber(s, "y"));
}
}
function processData() {
var topSentry = Number.POSITIVE_INFINITY,
bottomSentry = Number.NEGATIVE_INFINITY,
fakeInfinity = Number.MAX_VALUE,
i, j, k, m, length,
s, points, ps, x, y, axis, val, f, p,
data, format;
function updateAxis(axis, min, max) {
if (min < axis.datamin && min != -fakeInfinity)
axis.datamin = min;
if (max > axis.datamax && max != fakeInfinity)
axis.datamax = max;
}
$.each(allAxes(), function (_, axis) {
// init axis
axis.datamin = topSentry;
axis.datamax = bottomSentry;
axis.used = false;
});
for (i = 0; i < series.length; ++i) {
s = series[i];
s.datapoints = { points: [] };
executeHooks(hooks.processRawData, [ s, s.data, s.datapoints ]);
}
// first pass: clean and copy data
for (i = 0; i < series.length; ++i) {
s = series[i];
data = s.data;
format = s.datapoints.format;
if (!format) {
format = [];
// find out how to copy
format.push({ x: true, number: true, required: true });
format.push({ y: true, number: true, required: true });
if (s.bars.show || (s.lines.show && s.lines.fill)) {
var autoscale = !!((s.bars.show && s.bars.zero) || (s.lines.show && s.lines.zero));
format.push({ y: true, number: true, required: false, defaultValue: 0, autoscale: autoscale });
if (s.bars.horizontal) {
delete format[format.length - 1].y;
format[format.length - 1].x = true;
}
}
s.datapoints.format = format;
}
if (s.datapoints.pointsize != null)
continue; // already filled in
s.datapoints.pointsize = format.length;
ps = s.datapoints.pointsize;
points = s.datapoints.points;
var insertSteps = s.lines.show && s.lines.steps;
s.xaxis.used = s.yaxis.used = true;
for (j = k = 0; j < data.length; ++j, k += ps) {
p = data[j];
var nullify = p == null;
if (!nullify) {
for (m = 0; m < ps; ++m) {
val = p[m];
f = format[m];
if (f) {
if (f.number && val != null) {
val = +val; // convert to number
if (isNaN(val))
val = null;
else if (val == Infinity)
val = fakeInfinity;
else if (val == -Infinity)
val = -fakeInfinity;
}
if (val == null) {
if (f.required)
nullify = true;
if (f.defaultValue != null)
val = f.defaultValue;
}
}
points[k + m] = val;
}
}
if (nullify) {
for (m = 0; m < ps; ++m) {
val = points[k + m];
if (val != null) {
f = format[m];
// extract min/max info
if (f.autoscale !== false) {
if (f.x) {
updateAxis(s.xaxis, val, val);
}
if (f.y) {
updateAxis(s.yaxis, val, val);
}
}
}
points[k + m] = null;
}
}
else {
// a little bit of line specific stuff that
// perhaps shouldn't be here, but lacking
// better means...
if (insertSteps && k > 0
&& points[k - ps] != null
&& points[k - ps] != points[k]
&& points[k - ps + 1] != points[k + 1]) {
// copy the point to make room for a middle point
for (m = 0; m < ps; ++m)
points[k + ps + m] = points[k + m];
// middle point has same y
points[k + 1] = points[k - ps + 1];
// we've added a point, better reflect that
k += ps;
}
}
}
}
// give the hooks a chance to run
for (i = 0; i < series.length; ++i) {
s = series[i];
executeHooks(hooks.processDatapoints, [ s, s.datapoints]);
}
// second pass: find datamax/datamin for auto-scaling
for (i = 0; i < series.length; ++i) {
s = series[i];
points = s.datapoints.points;
ps = s.datapoints.pointsize;
format = s.datapoints.format;
var xmin = topSentry, ymin = topSentry,
xmax = bottomSentry, ymax = bottomSentry;
for (j = 0; j < points.length; j += ps) {
if (points[j] == null)
continue;
for (m = 0; m < ps; ++m) {
val = points[j + m];
f = format[m];
if (!f || f.autoscale === false || val == fakeInfinity || val == -fakeInfinity)
continue;
if (f.x) {
if (val < xmin)
xmin = val;
if (val > xmax)
xmax = val;
}
if (f.y) {
if (val < ymin)
ymin = val;
if (val > ymax)
ymax = val;
}
}
}
if (s.bars.show) {
// make sure we got room for the bar on the dancing floor
var delta;
switch (s.bars.align) {
case "left":
delta = 0;
break;
case "right":
delta = -s.bars.barWidth;
break;
default:
delta = -s.bars.barWidth / 2;
}
if (s.bars.horizontal) {
ymin += delta;
ymax += delta + s.bars.barWidth;
}
else {
xmin += delta;
xmax += delta + s.bars.barWidth;
}
}
updateAxis(s.xaxis, xmin, xmax);
updateAxis(s.yaxis, ymin, ymax);
}
$.each(allAxes(), function (_, axis) {
if (axis.datamin == topSentry)
axis.datamin = null;
if (axis.datamax == bottomSentry)
axis.datamax = null;
});
}
function setupCanvases() {
// Make sure the placeholder is clear of everything except canvases
// from a previous plot in this container that we'll try to re-use.
placeholder.css("padding", 0) // padding messes up the positioning
.children().filter(function(){
return !$(this).hasClass("flot-overlay") && !$(this).hasClass('flot-base');
}).remove();
if (placeholder.css("position") == 'static')
placeholder.css("position", "relative"); // for positioning labels and overlay
surface = new Canvas("flot-base", placeholder);
overlay = new Canvas("flot-overlay", placeholder); // overlay canvas for interactive features
ctx = surface.context;
octx = overlay.context;
// define which element we're listening for events on
eventHolder = $(overlay.element).unbind();
// If we're re-using a plot object, shut down the old one
var existing = placeholder.data("plot");
if (existing) {
existing.shutdown();
overlay.clear();
}
// save in case we get replotted
placeholder.data("plot", plot);
}
function bindEvents() {
// bind events
if (options.grid.hoverable) {
eventHolder.mousemove(onMouseMove);
// Use bind, rather than .mouseleave, because we officially
// still support jQuery 1.2.6, which doesn't define a shortcut
// for mouseenter or mouseleave. This was a bug/oversight that
// was fixed somewhere around 1.3.x. We can return to using
// .mouseleave when we drop support for 1.2.6.
eventHolder.bind("mouseleave", onMouseLeave);
}
if (options.grid.clickable)
eventHolder.click(onClick);
executeHooks(hooks.bindEvents, [eventHolder]);
}
function shutdown() {
if (redrawTimeout)
clearTimeout(redrawTimeout);
eventHolder.unbind("mousemove", onMouseMove);
eventHolder.unbind("mouseleave", onMouseLeave);
eventHolder.unbind("click", onClick);
executeHooks(hooks.shutdown, [eventHolder]);
}
function setTransformationHelpers(axis) {
// set helper functions on the axis, assumes plot area
// has been computed already
function identity(x) { return x; }
var s, m, t = axis.options.transform || identity,
it = axis.options.inverseTransform;
// precompute how much the axis is scaling a point
// in canvas space
if (axis.direction == "x") {
s = axis.scale = plotWidth / Math.abs(t(axis.max) - t(axis.min));
m = Math.min(t(axis.max), t(axis.min));
}
else {
s = axis.scale = plotHeight / Math.abs(t(axis.max) - t(axis.min));
s = -s;
m = Math.max(t(axis.max), t(axis.min));
}
// data point to canvas coordinate
if (t == identity) // slight optimization
axis.p2c = function (p) { return (p - m) * s; };
else
axis.p2c = function (p) { return (t(p) - m) * s; };
// canvas coordinate to data point
if (!it)
axis.c2p = function (c) { return m + c / s; };
else
axis.c2p = function (c) { return it(m + c / s); };
}
function measureTickLabels(axis) {
var opts = axis.options,
ticks = axis.ticks || [],
labelWidth = opts.labelWidth || 0,
labelHeight = opts.labelHeight || 0,
maxWidth = labelWidth || (axis.direction == "x" ? Math.floor(surface.width / (ticks.length || 1)) : null),
legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis",
layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles,
font = opts.font || "flot-tick-label tickLabel";
for (var i = 0; i < ticks.length; ++i) {
var t = ticks[i];
if (!t.label)
continue;
var info = surface.getTextInfo(layer, t.label, font, null, maxWidth);
labelWidth = Math.max(labelWidth, info.width);
labelHeight = Math.max(labelHeight, info.height);
}
axis.labelWidth = opts.labelWidth || labelWidth;
axis.labelHeight = opts.labelHeight || labelHeight;
}
function allocateAxisBoxFirstPhase(axis) {
// find the bounding box of the axis by looking at label
// widths/heights and ticks, make room by diminishing the
// plotOffset; this first phase only looks at one
// dimension per axis, the other dimension depends on the
// other axes so will have to wait
var lw = axis.labelWidth,
lh = axis.labelHeight,
pos = axis.options.position,
isXAxis = axis.direction === "x",
tickLength = axis.options.tickLength,
axisMargin = options.grid.axisMargin,
padding = options.grid.labelMargin,
innermost = true,
outermost = true,
first = true,
found = false;
// Determine the axis's position in its direction and on its side
$.each(isXAxis ? xaxes : yaxes, function(i, a) {
if (a && (a.show || a.reserveSpace)) {
if (a === axis) {
found = true;
} else if (a.options.position === pos) {
if (found) {
outermost = false;
} else {
innermost = false;
}
}
if (!found) {
first = false;
}
}
});
// The outermost axis on each side has no margin
if (outermost) {
axisMargin = 0;
}
// The ticks for the first axis in each direction stretch across
if (tickLength == null) {
tickLength = first ? "full" : 5;
}
if (!isNaN(+tickLength))
padding += +tickLength;
if (isXAxis) {
lh += padding;
if (pos == "bottom") {
plotOffset.bottom += lh + axisMargin;
axis.box = { top: surface.height - plotOffset.bottom, height: lh };
}
else {
axis.box = { top: plotOffset.top + axisMargin, height: lh };
plotOffset.top += lh + axisMargin;
}
}
else {
lw += padding;
if (pos == "left") {
axis.box = { left: plotOffset.left + axisMargin, width: lw };
plotOffset.left += lw + axisMargin;
}
else {
plotOffset.right += lw + axisMargin;
axis.box = { left: surface.width - plotOffset.right, width: lw };
}
}
// save for future reference
axis.position = pos;
axis.tickLength = tickLength;
axis.box.padding = padding;
axis.innermost = innermost;
}
function allocateAxisBoxSecondPhase(axis) {
// now that all axis boxes have been placed in one
// dimension, we can set the remaining dimension coordinates
if (axis.direction == "x") {
axis.box.left = plotOffset.left - axis.labelWidth / 2;
axis.box.width = surface.width - plotOffset.left - plotOffset.right + axis.labelWidth;
}
else {
axis.box.top = plotOffset.top - axis.labelHeight / 2;
axis.box.height = surface.height - plotOffset.bottom - plotOffset.top + axis.labelHeight;
}
}
function adjustLayoutForThingsStickingOut() {
// possibly adjust plot offset to ensure everything stays
// inside the canvas and isn't clipped off
var minMargin = options.grid.minBorderMargin,
axis, i;
// check stuff from the plot (FIXME: this should just read
// a value from the series, otherwise it's impossible to
// customize)
if (minMargin == null) {
minMargin = 0;
for (i = 0; i < series.length; ++i)
minMargin = Math.max(minMargin, 2 * (series[i].points.radius + series[i].points.lineWidth/2));
}
var margins = {
left: minMargin,
right: minMargin,
top: minMargin,
bottom: minMargin
};
// check axis labels, note we don't check the actual
// labels but instead use the overall width/height to not
// jump as much around with replots
$.each(allAxes(), function (_, axis) {
if (axis.reserveSpace && axis.ticks && axis.ticks.length) {
if (axis.direction === "x") {
margins.left = Math.max(margins.left, axis.labelWidth / 2);
margins.right = Math.max(margins.right, axis.labelWidth / 2);
} else {
margins.bottom = Math.max(margins.bottom, axis.labelHeight / 2);
margins.top = Math.max(margins.top, axis.labelHeight / 2);
}
}
});
plotOffset.left = Math.ceil(Math.max(margins.left, plotOffset.left));
plotOffset.right = Math.ceil(Math.max(margins.right, plotOffset.right));
plotOffset.top = Math.ceil(Math.max(margins.top, plotOffset.top));
plotOffset.bottom = Math.ceil(Math.max(margins.bottom, plotOffset.bottom));
}
function setupGrid() {
var i, axes = allAxes(), showGrid = options.grid.show;
// Initialize the plot's offset from the edge of the canvas
for (var a in plotOffset) {
var margin = options.grid.margin || 0;
plotOffset[a] = typeof margin == "number" ? margin : margin[a] || 0;
}
executeHooks(hooks.processOffset, [plotOffset]);
// If the grid is visible, add its border width to the offset
for (var a in plotOffset) {
if(typeof(options.grid.borderWidth) == "object") {
plotOffset[a] += showGrid ? options.grid.borderWidth[a] : 0;
}
else {
plotOffset[a] += showGrid ? options.grid.borderWidth : 0;
}
}
$.each(axes, function (_, axis) {
var axisOpts = axis.options;
axis.show = axisOpts.show == null ? axis.used : axisOpts.show;
axis.reserveSpace = axisOpts.reserveSpace == null ? axis.show : axisOpts.reserveSpace;
setRange(axis);
});
if (showGrid) {
var allocatedAxes = $.grep(axes, function (axis) {
return axis.show || axis.reserveSpace;
});
$.each(allocatedAxes, function (_, axis) {
// make the ticks
setupTickGeneration(axis);
setTicks(axis);
snapRangeToTicks(axis, axis.ticks);
// find labelWidth/Height for axis
measureTickLabels(axis);
});
// with all dimensions calculated, we can compute the
// axis bounding boxes, start from the outside
// (reverse order)
for (i = allocatedAxes.length - 1; i >= 0; --i)
allocateAxisBoxFirstPhase(allocatedAxes[i]);
// make sure we've got enough space for things that
// might stick out
adjustLayoutForThingsStickingOut();
$.each(allocatedAxes, function (_, axis) {
allocateAxisBoxSecondPhase(axis);
});
}
plotWidth = surface.width - plotOffset.left - plotOffset.right;
plotHeight = surface.height - plotOffset.bottom - plotOffset.top;
// now we got the proper plot dimensions, we can compute the scaling
$.each(axes, function (_, axis) {
setTransformationHelpers(axis);
});
if (showGrid) {
drawAxisLabels();
}
insertLegend();
}
function setRange(axis) {
var opts = axis.options,
min = +(opts.min != null ? opts.min : axis.datamin),
max = +(opts.max != null ? opts.max : axis.datamax),
delta = max - min;
if (delta == 0.0) {
// degenerate case
var widen = max == 0 ? 1 : 0.01;
if (opts.min == null)
min -= widen;
// always widen max if we couldn't widen min to ensure we
// don't fall into min == max which doesn't work
if (opts.max == null || opts.min != null)
max += widen;
}
else {
// consider autoscaling
var margin = opts.autoscaleMargin;
if (margin != null) {
if (opts.min == null) {
min -= delta * margin;
// make sure we don't go below zero if all values
// are positive
if (min < 0 && axis.datamin != null && axis.datamin >= 0)
min = 0;
}
if (opts.max == null) {
max += delta * margin;
if (max > 0 && axis.datamax != null && axis.datamax <= 0)
max = 0;
}
}
}
axis.min = min;
axis.max = max;
}
function setupTickGeneration(axis) {
var opts = axis.options;
// estimate number of ticks
var noTicks;
if (typeof opts.ticks == "number" && opts.ticks > 0)
noTicks = opts.ticks;
else
// heuristic based on the model a*sqrt(x) fitted to
// some data points that seemed reasonable
noTicks = 0.3 * Math.sqrt(axis.direction == "x" ? surface.width : surface.height);
var delta = (axis.max - axis.min) / noTicks,
dec = -Math.floor(Math.log(delta) / Math.LN10),
maxDec = opts.tickDecimals;
if (maxDec != null && dec > maxDec) {
dec = maxDec;
}
var magn = Math.pow(10, -dec),
norm = delta / magn, // norm is between 1.0 and 10.0
size;
if (norm < 1.5) {
size = 1;
} else if (norm < 3) {
size = 2;
// special case for 2.5, requires an extra decimal
if (norm > 2.25 && (maxDec == null || dec + 1 <= maxDec)) {
size = 2.5;
++dec;
}
} else if (norm < 7.5) {
size = 5;
} else {
size = 10;
}
size *= magn;
if (opts.minTickSize != null && size < opts.minTickSize) {
size = opts.minTickSize;
}
axis.delta = delta;
axis.tickDecimals = Math.max(0, maxDec != null ? maxDec : dec);
axis.tickSize = opts.tickSize || size;
// Time mode was moved to a plug-in in 0.8, and since so many people use it
// we'll add an especially friendly reminder to make sure they included it.
if (opts.mode == "time" && !axis.tickGenerator) {
throw new Error("Time mode requires the flot.time plugin.");
}
// Flot supports base-10 axes; any other mode else is handled by a plug-in,
// like flot.time.js.
if (!axis.tickGenerator) {
axis.tickGenerator = function (axis) {
var ticks = [],
start = floorInBase(axis.min, axis.tickSize),
i = 0,
v = Number.NaN,
prev;
do {
prev = v;
v = start + i * axis.tickSize;
ticks.push(v);
++i;
} while (v < axis.max && v != prev);
return ticks;
};
axis.tickFormatter = function (value, axis) {
var factor = axis.tickDecimals ? Math.pow(10, axis.tickDecimals) : 1;
var formatted = "" + Math.round(value * factor) / factor;
// If tickDecimals was specified, ensure that we have exactly that
// much precision; otherwise default to the value's own precision.
if (axis.tickDecimals != null) {
var decimal = formatted.indexOf(".");
var precision = decimal == -1 ? 0 : formatted.length - decimal - 1;
if (precision < axis.tickDecimals) {
return (precision ? formatted : formatted + ".") + ("" + factor).substr(1, axis.tickDecimals - precision);
}
}
return formatted;
};
}
if ($.isFunction(opts.tickFormatter))
axis.tickFormatter = function (v, axis) { return "" + opts.tickFormatter(v, axis); };
if (opts.alignTicksWithAxis != null) {
var otherAxis = (axis.direction == "x" ? xaxes : yaxes)[opts.alignTicksWithAxis - 1];
if (otherAxis && otherAxis.used && otherAxis != axis) {
// consider snapping min/max to outermost nice ticks
var niceTicks = axis.tickGenerator(axis);
if (niceTicks.length > 0) {
if (opts.min == null)
axis.min = Math.min(axis.min, niceTicks[0]);
if (opts.max == null && niceTicks.length > 1)
axis.max = Math.max(axis.max, niceTicks[niceTicks.length - 1]);
}
axis.tickGenerator = function (axis) {
// copy ticks, scaled to this axis
var ticks = [], v, i;
for (i = 0; i < otherAxis.ticks.length; ++i) {
v = (otherAxis.ticks[i].v - otherAxis.min) / (otherAxis.max - otherAxis.min);
v = axis.min + v * (axis.max - axis.min);
ticks.push(v);
}
return ticks;
};
// we might need an extra decimal since forced
// ticks don't necessarily fit naturally
if (!axis.mode && opts.tickDecimals == null) {
var extraDec = Math.max(0, -Math.floor(Math.log(axis.delta) / Math.LN10) + 1),
ts = axis.tickGenerator(axis);
// only proceed if the tick interval rounded
// with an extra decimal doesn't give us a
// zero at end
if (!(ts.length > 1 && /\..*0$/.test((ts[1] - ts[0]).toFixed(extraDec))))
axis.tickDecimals = extraDec;
}
}
}
}
function setTicks(axis) {
var oticks = axis.options.ticks, ticks = [];
if (oticks == null || (typeof oticks == "number" && oticks > 0))
ticks = axis.tickGenerator(axis);
else if (oticks) {
if ($.isFunction(oticks))
// generate the ticks
ticks = oticks(axis);
else
ticks = oticks;
}
// clean up/labelify the supplied ticks, copy them over
var i, v;
axis.ticks = [];
for (i = 0; i < ticks.length; ++i) {
var label = null;
var t = ticks[i];
if (typeof t == "object") {
v = +t[0];
if (t.length > 1)
label = t[1];
}
else
v = +t;
if (label == null)
label = axis.tickFormatter(v, axis);
if (!isNaN(v))
axis.ticks.push({ v: v, label: label });
}
}
function snapRangeToTicks(axis, ticks) {
if (axis.options.autoscaleMargin && ticks.length > 0) {
// snap to ticks
if (axis.options.min == null)
axis.min = Math.min(axis.min, ticks[0].v);
if (axis.options.max == null && ticks.length > 1)
axis.max = Math.max(axis.max, ticks[ticks.length - 1].v);
}
}
function draw() {
surface.clear();
executeHooks(hooks.drawBackground, [ctx]);
var grid = options.grid;
// draw background, if any
if (grid.show && grid.backgroundColor)
drawBackground();
if (grid.show && !grid.aboveData) {
drawGrid();
}
for (var i = 0; i < series.length; ++i) {
executeHooks(hooks.drawSeries, [ctx, series[i]]);
drawSeries(series[i]);
}
executeHooks(hooks.draw, [ctx]);
if (grid.show && grid.aboveData) {
drawGrid();
}
surface.render();
// A draw implies that either the axes or data have changed, so we
// should probably update the overlay highlights as well.
triggerRedrawOverlay();
}
function extractRange(ranges, coord) {
var axis, from, to, key, axes = allAxes();
for (var i = 0; i < axes.length; ++i) {
axis = axes[i];
if (axis.direction == coord) {
key = coord + axis.n + "axis";
if (!ranges[key] && axis.n == 1)
key = coord + "axis"; // support x1axis as xaxis
if (ranges[key]) {
from = ranges[key].from;
to = ranges[key].to;
break;
}
}
}
// backwards-compat stuff - to be removed in future
if (!ranges[key]) {
axis = coord == "x" ? xaxes[0] : yaxes[0];
from = ranges[coord + "1"];
to = ranges[coord + "2"];
}
// auto-reverse as an added bonus
if (from != null && to != null && from > to) {
var tmp = from;
from = to;
to = tmp;
}
return { from: from, to: to, axis: axis };
}
function drawBackground() {
ctx.save();
ctx.translate(plotOffset.left, plotOffset.top);
ctx.fillStyle = getColorOrGradient(options.grid.backgroundColor, plotHeight, 0, "rgba(255, 255, 255, 0)");
ctx.fillRect(0, 0, plotWidth, plotHeight);
ctx.restore();
}
function drawGrid() {
var i, axes, bw, bc;
ctx.save();
ctx.translate(plotOffset.left, plotOffset.top);
// draw markings
var markings = options.grid.markings;
if (markings) {
if ($.isFunction(markings)) {
axes = plot.getAxes();
// xmin etc. is backwards compatibility, to be
// removed in the future
axes.xmin = axes.xaxis.min;
axes.xmax = axes.xaxis.max;
axes.ymin = axes.yaxis.min;
axes.ymax = axes.yaxis.max;
markings = markings(axes);
}
for (i = 0; i < markings.length; ++i) {
var m = markings[i],
xrange = extractRange(m, "x"),
yrange = extractRange(m, "y");
// fill in missing
if (xrange.from == null)
xrange.from = xrange.axis.min;
if (xrange.to == null)
xrange.to = xrange.axis.max;
if (yrange.from == null)
yrange.from = yrange.axis.min;
if (yrange.to == null)
yrange.to = yrange.axis.max;
// clip
if (xrange.to < xrange.axis.min || xrange.from > xrange.axis.max ||
yrange.to < yrange.axis.min || yrange.from > yrange.axis.max)
continue;
xrange.from = Math.max(xrange.from, xrange.axis.min);
xrange.to = Math.min(xrange.to, xrange.axis.max);
yrange.from = Math.max(yrange.from, yrange.axis.min);
yrange.to = Math.min(yrange.to, yrange.axis.max);
var xequal = xrange.from === xrange.to,
yequal = yrange.from === yrange.to;
if (xequal && yequal) {
continue;
}
// then draw
xrange.from = Math.floor(xrange.axis.p2c(xrange.from));
xrange.to = Math.floor(xrange.axis.p2c(xrange.to));
yrange.from = Math.floor(yrange.axis.p2c(yrange.from));
yrange.to = Math.floor(yrange.axis.p2c(yrange.to));
if (xequal || yequal) {
var lineWidth = m.lineWidth || options.grid.markingsLineWidth,
subPixel = lineWidth % 2 ? 0.5 : 0;
ctx.beginPath();
ctx.strokeStyle = m.color || options.grid.markingsColor;
ctx.lineWidth = lineWidth;
if (xequal) {
ctx.moveTo(xrange.to + subPixel, yrange.from);
ctx.lineTo(xrange.to + subPixel, yrange.to);
} else {
ctx.moveTo(xrange.from, yrange.to + subPixel);
ctx.lineTo(xrange.to, yrange.to + subPixel);
}
ctx.stroke();
} else {
ctx.fillStyle = m.color || options.grid.markingsColor;
ctx.fillRect(xrange.from, yrange.to,
xrange.to - xrange.from,
yrange.from - yrange.to);
}
}
}
// draw the ticks
axes = allAxes();
bw = options.grid.borderWidth;
for (var j = 0; j < axes.length; ++j) {
var axis = axes[j], box = axis.box,
t = axis.tickLength, x, y, xoff, yoff;
if (!axis.show || axis.ticks.length == 0)
continue;
ctx.lineWidth = 1;
// find the edges
if (axis.direction == "x") {
x = 0;
if (t == "full")
y = (axis.position == "top" ? 0 : plotHeight);
else
y = box.top - plotOffset.top + (axis.position == "top" ? box.height : 0);
}
else {
y = 0;
if (t == "full")
x = (axis.position == "left" ? 0 : plotWidth);
else
x = box.left - plotOffset.left + (axis.position == "left" ? box.width : 0);
}
// draw tick bar
if (!axis.innermost) {
ctx.strokeStyle = axis.options.color;
ctx.beginPath();
xoff = yoff = 0;
if (axis.direction == "x")
xoff = plotWidth + 1;
else
yoff = plotHeight + 1;
if (ctx.lineWidth == 1) {
if (axis.direction == "x") {
y = Math.floor(y) + 0.5;
} else {
x = Math.floor(x) + 0.5;
}
}
ctx.moveTo(x, y);
ctx.lineTo(x + xoff, y + yoff);
ctx.stroke();
}
// draw ticks
ctx.strokeStyle = axis.options.tickColor;
ctx.beginPath();
for (i = 0; i < axis.ticks.length; ++i) {
var v = axis.ticks[i].v;
xoff = yoff = 0;
if (isNaN(v) || v < axis.min || v > axis.max
// skip those lying on the axes if we got a border
|| (t == "full"
&& ((typeof bw == "object" && bw[axis.position] > 0) || bw > 0)
&& (v == axis.min || v == axis.max)))
continue;
if (axis.direction == "x") {
x = axis.p2c(v);
yoff = t == "full" ? -plotHeight : t;
if (axis.position == "top")
yoff = -yoff;
}
else {
y = axis.p2c(v);
xoff = t == "full" ? -plotWidth : t;
if (axis.position == "left")
xoff = -xoff;
}
if (ctx.lineWidth == 1) {
if (axis.direction == "x")
x = Math.floor(x) + 0.5;
else
y = Math.floor(y) + 0.5;
}
ctx.moveTo(x, y);
ctx.lineTo(x + xoff, y + yoff);
}
ctx.stroke();
}
// draw border
if (bw) {
// If either borderWidth or borderColor is an object, then draw the border
// line by line instead of as one rectangle
bc = options.grid.borderColor;
if(typeof bw == "object" || typeof bc == "object") {
if (typeof bw !== "object") {
bw = {top: bw, right: bw, bottom: bw, left: bw};
}
if (typeof bc !== "object") {
bc = {top: bc, right: bc, bottom: bc, left: bc};
}
if (bw.top > 0) {
ctx.strokeStyle = bc.top;
ctx.lineWidth = bw.top;
ctx.beginPath();
ctx.moveTo(0 - bw.left, 0 - bw.top/2);
ctx.lineTo(plotWidth, 0 - bw.top/2);
ctx.stroke();
}
if (bw.right > 0) {
ctx.strokeStyle = bc.right;
ctx.lineWidth = bw.right;
ctx.beginPath();
ctx.moveTo(plotWidth + bw.right / 2, 0 - bw.top);
ctx.lineTo(plotWidth + bw.right / 2, plotHeight);
ctx.stroke();
}
if (bw.bottom > 0) {
ctx.strokeStyle = bc.bottom;
ctx.lineWidth = bw.bottom;
ctx.beginPath();
ctx.moveTo(plotWidth + bw.right, plotHeight + bw.bottom / 2);
ctx.lineTo(0, plotHeight + bw.bottom / 2);
ctx.stroke();
}
if (bw.left > 0) {
ctx.strokeStyle = bc.left;
ctx.lineWidth = bw.left;
ctx.beginPath();
ctx.moveTo(0 - bw.left/2, plotHeight + bw.bottom);
ctx.lineTo(0- bw.left/2, 0);
ctx.stroke();
}
}
else {
ctx.lineWidth = bw;
ctx.strokeStyle = options.grid.borderColor;
ctx.strokeRect(-bw/2, -bw/2, plotWidth + bw, plotHeight + bw);
}
}
ctx.restore();
}
function drawAxisLabels() {
$.each(allAxes(), function (_, axis) {
var box = axis.box,
legacyStyles = axis.direction + "Axis " + axis.direction + axis.n + "Axis",
layer = "flot-" + axis.direction + "-axis flot-" + axis.direction + axis.n + "-axis " + legacyStyles,
font = axis.options.font || "flot-tick-label tickLabel",
tick, x, y, halign, valign;
// Remove text before checking for axis.show and ticks.length;
// otherwise plugins, like flot-tickrotor, that draw their own
// tick labels will end up with both theirs and the defaults.
surface.removeText(layer);
if (!axis.show || axis.ticks.length == 0)
return;
for (var i = 0; i < axis.ticks.length; ++i) {
tick = axis.ticks[i];
if (!tick.label || tick.v < axis.min || tick.v > axis.max)
continue;
if (axis.direction == "x") {
halign = "center";
x = plotOffset.left + axis.p2c(tick.v);
if (axis.position == "bottom") {
y = box.top + box.padding;
} else {
y = box.top + box.height - box.padding;
valign = "bottom";
}
} else {
valign = "middle";
y = plotOffset.top + axis.p2c(tick.v);
if (axis.position == "left") {
x = box.left + box.width - box.padding;
halign = "right";
} else {
x = box.left + box.padding;
}
}
surface.addText(layer, x, y, tick.label, font, null, null, halign, valign);
}
});
}
function drawSeries(series) {
if (series.lines.show)
drawSeriesLines(series);
if (series.bars.show)
drawSeriesBars(series);
if (series.points.show)
drawSeriesPoints(series);
}
function drawSeriesLines(series) {
function plotLine(datapoints, xoffset, yoffset, axisx, axisy) {
var points = datapoints.points,
ps = datapoints.pointsize,
prevx = null, prevy = null;
ctx.beginPath();
for (var i = ps; i < points.length; i += ps) {
var x1 = points[i - ps], y1 = points[i - ps + 1],
x2 = points[i], y2 = points[i + 1];
if (x1 == null || x2 == null)
continue;
// clip with ymin
if (y1 <= y2 && y1 < axisy.min) {
if (y2 < axisy.min)
continue; // line segment is outside
// compute new intersection point
x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
y1 = axisy.min;
}
else if (y2 <= y1 && y2 < axisy.min) {
if (y1 < axisy.min)
continue;
x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
y2 = axisy.min;
}
// clip with ymax
if (y1 >= y2 && y1 > axisy.max) {
if (y2 > axisy.max)
continue;
x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
y1 = axisy.max;
}
else if (y2 >= y1 && y2 > axisy.max) {
if (y1 > axisy.max)
continue;
x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
y2 = axisy.max;
}
// clip with xmin
if (x1 <= x2 && x1 < axisx.min) {
if (x2 < axisx.min)
continue;
y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
x1 = axisx.min;
}
else if (x2 <= x1 && x2 < axisx.min) {
if (x1 < axisx.min)
continue;
y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
x2 = axisx.min;
}
// clip with xmax
if (x1 >= x2 && x1 > axisx.max) {
if (x2 > axisx.max)
continue;
y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
x1 = axisx.max;
}
else if (x2 >= x1 && x2 > axisx.max) {
if (x1 > axisx.max)
continue;
y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
x2 = axisx.max;
}
if (x1 != prevx || y1 != prevy)
ctx.moveTo(axisx.p2c(x1) + xoffset, axisy.p2c(y1) + yoffset);
prevx = x2;
prevy = y2;
ctx.lineTo(axisx.p2c(x2) + xoffset, axisy.p2c(y2) + yoffset);
}
ctx.stroke();
}
function plotLineArea(datapoints, axisx, axisy) {
var points = datapoints.points,
ps = datapoints.pointsize,
bottom = Math.min(Math.max(0, axisy.min), axisy.max),
i = 0, top, areaOpen = false,
ypos = 1, segmentStart = 0, segmentEnd = 0;
// we process each segment in two turns, first forward
// direction to sketch out top, then once we hit the
// end we go backwards to sketch the bottom
while (true) {
if (ps > 0 && i > points.length + ps)
break;
i += ps; // ps is negative if going backwards
var x1 = points[i - ps],
y1 = points[i - ps + ypos],
x2 = points[i], y2 = points[i + ypos];
if (areaOpen) {
if (ps > 0 && x1 != null && x2 == null) {
// at turning point
segmentEnd = i;
ps = -ps;
ypos = 2;
continue;
}
if (ps < 0 && i == segmentStart + ps) {
// done with the reverse sweep
ctx.fill();
areaOpen = false;
ps = -ps;
ypos = 1;
i = segmentStart = segmentEnd + ps;
continue;
}
}
if (x1 == null || x2 == null)
continue;
// clip x values
// clip with xmin
if (x1 <= x2 && x1 < axisx.min) {
if (x2 < axisx.min)
continue;
y1 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
x1 = axisx.min;
}
else if (x2 <= x1 && x2 < axisx.min) {
if (x1 < axisx.min)
continue;
y2 = (axisx.min - x1) / (x2 - x1) * (y2 - y1) + y1;
x2 = axisx.min;
}
// clip with xmax
if (x1 >= x2 && x1 > axisx.max) {
if (x2 > axisx.max)
continue;
y1 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
x1 = axisx.max;
}
else if (x2 >= x1 && x2 > axisx.max) {
if (x1 > axisx.max)
continue;
y2 = (axisx.max - x1) / (x2 - x1) * (y2 - y1) + y1;
x2 = axisx.max;
}
if (!areaOpen) {
// open area
ctx.beginPath();
ctx.moveTo(axisx.p2c(x1), axisy.p2c(bottom));
areaOpen = true;
}
// now first check the case where both is outside
if (y1 >= axisy.max && y2 >= axisy.max) {
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
continue;
}
else if (y1 <= axisy.min && y2 <= axisy.min) {
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
continue;
}
// else it's a bit more complicated, there might
// be a flat maxed out rectangle first, then a
// triangular cutout or reverse; to find these
// keep track of the current x values
var x1old = x1, x2old = x2;
// clip the y values, without shortcutting, we
// go through all cases in turn
// clip with ymin
if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
x1 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
y1 = axisy.min;
}
else if (y2 <= y1 && y2 < axisy.min && y1 >= axisy.min) {
x2 = (axisy.min - y1) / (y2 - y1) * (x2 - x1) + x1;
y2 = axisy.min;
}
// clip with ymax
if (y1 >= y2 && y1 > axisy.max && y2 <= axisy.max) {
x1 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
y1 = axisy.max;
}
else if (y2 >= y1 && y2 > axisy.max && y1 <= axisy.max) {
x2 = (axisy.max - y1) / (y2 - y1) * (x2 - x1) + x1;
y2 = axisy.max;
}
// if the x value was changed we got a rectangle
// to fill
if (x1 != x1old) {
ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1));
// it goes to (x1, y1), but we fill that below
}
// fill triangular section, this sometimes result
// in redundant points if (x1, y1) hasn't changed
// from previous line to, but we just ignore that
ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
// fill the other rectangle if it's there
if (x2 != x2old) {
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2));
}
}
}
ctx.save();
ctx.translate(plotOffset.left, plotOffset.top);
ctx.lineJoin = "round";
var lw = series.lines.lineWidth,
sw = series.shadowSize;
// FIXME: consider another form of shadow when filling is turned on
if (lw > 0 && sw > 0) {
// draw shadow as a thick and thin line with transparency
ctx.lineWidth = sw;
ctx.strokeStyle = "rgba(0,0,0,0.1)";
// position shadow at angle from the mid of line
var angle = Math.PI/18;
plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/2), Math.cos(angle) * (lw/2 + sw/2), series.xaxis, series.yaxis);
ctx.lineWidth = sw/2;
plotLine(series.datapoints, Math.sin(angle) * (lw/2 + sw/4), Math.cos(angle) * (lw/2 + sw/4), series.xaxis, series.yaxis);
}
ctx.lineWidth = lw;
ctx.strokeStyle = series.color;
var fillStyle = getFillStyle(series.lines, series.color, 0, plotHeight);
if (fillStyle) {
ctx.fillStyle = fillStyle;
plotLineArea(series.datapoints, series.xaxis, series.yaxis);
}
if (lw > 0)
plotLine(series.datapoints, 0, 0, series.xaxis, series.yaxis);
ctx.restore();
}
function drawSeriesPoints(series) {
function plotPoints(datapoints, radius, fillStyle, offset, shadow, axisx, axisy, symbol) {
var points = datapoints.points, ps = datapoints.pointsize;
for (var i = 0; i < points.length; i += ps) {
var x = points[i], y = points[i + 1];
if (x == null || x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max)
continue;
ctx.beginPath();
x = axisx.p2c(x);
y = axisy.p2c(y) + offset;
if (symbol == "circle")
ctx.arc(x, y, radius, 0, shadow ? Math.PI : Math.PI * 2, false);
else
symbol(ctx, x, y, radius, shadow);
ctx.closePath();
if (fillStyle) {
ctx.fillStyle = fillStyle;
ctx.fill();
}
ctx.stroke();
}
}
ctx.save();
ctx.translate(plotOffset.left, plotOffset.top);
var lw = series.points.lineWidth,
sw = series.shadowSize,
radius = series.points.radius,
symbol = series.points.symbol;
// If the user sets the line width to 0, we change it to a very
// small value. A line width of 0 seems to force the default of 1.
// Doing the conditional here allows the shadow setting to still be
// optional even with a lineWidth of 0.
if( lw == 0 )
lw = 0.0001;
if (lw > 0 && sw > 0) {
// draw shadow in two steps
var w = sw / 2;
ctx.lineWidth = w;
ctx.strokeStyle = "rgba(0,0,0,0.1)";
plotPoints(series.datapoints, radius, null, w + w/2, true,
series.xaxis, series.yaxis, symbol);
ctx.strokeStyle = "rgba(0,0,0,0.2)";
plotPoints(series.datapoints, radius, null, w/2, true,
series.xaxis, series.yaxis, symbol);
}
ctx.lineWidth = lw;
ctx.strokeStyle = series.color;
plotPoints(series.datapoints, radius,
getFillStyle(series.points, series.color), 0, false,
series.xaxis, series.yaxis, symbol);
ctx.restore();
}
function drawBar(x, y, b, barLeft, barRight, fillStyleCallback, axisx, axisy, c, horizontal, lineWidth) {
var left, right, bottom, top,
drawLeft, drawRight, drawTop, drawBottom,
tmp;
// in horizontal mode, we start the bar from the left
// instead of from the bottom so it appears to be
// horizontal rather than vertical
if (horizontal) {
drawBottom = drawRight = drawTop = true;
drawLeft = false;
left = b;
right = x;
top = y + barLeft;
bottom = y + barRight;
// account for negative bars
if (right < left) {
tmp = right;
right = left;
left = tmp;
drawLeft = true;
drawRight = false;
}
}
else {
drawLeft = drawRight = drawTop = true;
drawBottom = false;
left = x + barLeft;
right = x + barRight;
bottom = b;
top = y;
// account for negative bars
if (top < bottom) {
tmp = top;
top = bottom;
bottom = tmp;
drawBottom = true;
drawTop = false;
}
}
// clip
if (right < axisx.min || left > axisx.max ||
top < axisy.min || bottom > axisy.max)
return;
if (left < axisx.min) {
left = axisx.min;
drawLeft = false;
}
if (right > axisx.max) {
right = axisx.max;
drawRight = false;
}
if (bottom < axisy.min) {
bottom = axisy.min;
drawBottom = false;
}
if (top > axisy.max) {
top = axisy.max;
drawTop = false;
}
left = axisx.p2c(left);
bottom = axisy.p2c(bottom);
right = axisx.p2c(right);
top = axisy.p2c(top);
// fill the bar
if (fillStyleCallback) {
c.fillStyle = fillStyleCallback(bottom, top);
c.fillRect(left, top, right - left, bottom - top)
}
// draw outline
if (lineWidth > 0 && (drawLeft || drawRight || drawTop || drawBottom)) {
c.beginPath();
// FIXME: inline moveTo is buggy with excanvas
c.moveTo(left, bottom);
if (drawLeft)
c.lineTo(left, top);
else
c.moveTo(left, top);
if (drawTop)
c.lineTo(right, top);
else
c.moveTo(right, top);
if (drawRight)
c.lineTo(right, bottom);
else
c.moveTo(right, bottom);
if (drawBottom)
c.lineTo(left, bottom);
else
c.moveTo(left, bottom);
c.stroke();
}
}
function drawSeriesBars(series) {
function plotBars(datapoints, barLeft, barRight, fillStyleCallback, axisx, axisy) {
var points = datapoints.points, ps = datapoints.pointsize;
for (var i = 0; i < points.length; i += ps) {
if (points[i] == null)
continue;
drawBar(points[i], points[i + 1], points[i + 2], barLeft, barRight, fillStyleCallback, axisx, axisy, ctx, series.bars.horizontal, series.bars.lineWidth);
}
}
ctx.save();
ctx.translate(plotOffset.left, plotOffset.top);
// FIXME: figure out a way to add shadows (for instance along the right edge)
ctx.lineWidth = series.bars.lineWidth;
ctx.strokeStyle = series.color;
var barLeft;
switch (series.bars.align) {
case "left":
barLeft = 0;
break;
case "right":
barLeft = -series.bars.barWidth;
break;
default:
barLeft = -series.bars.barWidth / 2;
}
var fillStyleCallback = series.bars.fill ? function (bottom, top) { return getFillStyle(series.bars, series.color, bottom, top); } : null;
plotBars(series.datapoints, barLeft, barLeft + series.bars.barWidth, fillStyleCallback, series.xaxis, series.yaxis);
ctx.restore();
}
function getFillStyle(filloptions, seriesColor, bottom, top) {
var fill = filloptions.fill;
if (!fill)
return null;
if (filloptions.fillColor)
return getColorOrGradient(filloptions.fillColor, bottom, top, seriesColor);
var c = $.color.parse(seriesColor);
c.a = typeof fill == "number" ? fill : 0.4;
c.normalize();
return c.toString();
}
function insertLegend() {
if (options.legend.container != null) {
$(options.legend.container).html("");
} else {
placeholder.find(".legend").remove();
}
if (!options.legend.show) {
return;
}
var fragments = [], entries = [], rowStarted = false,
lf = options.legend.labelFormatter, s, label;
// Build a list of legend entries, with each having a label and a color
for (var i = 0; i < series.length; ++i) {
s = series[i];
if (s.label) {
label = lf ? lf(s.label, s) : s.label;
if (label) {
entries.push({
label: label,
color: s.color
});
}
}
}
// Sort the legend using either the default or a custom comparator
if (options.legend.sorted) {
if ($.isFunction(options.legend.sorted)) {
entries.sort(options.legend.sorted);
} else if (options.legend.sorted == "reverse") {
entries.reverse();
} else {
var ascending = options.legend.sorted != "descending";
entries.sort(function(a, b) {
return a.label == b.label ? 0 : (
(a.label < b.label) != ascending ? 1 : -1 // Logical XOR
);
});
}
}
// Generate markup for the list of entries, in their final order
for (var i = 0; i < entries.length; ++i) {
var entry = entries[i];
if (i % options.legend.noColumns == 0) {
if (rowStarted)
fragments.push('</tr>');
fragments.push('<tr>');
rowStarted = true;
}
fragments.push(
'<td class="legendColorBox"><div style="border:1px solid ' + options.legend.labelBoxBorderColor + ';padding:1px"><div style="width:4px;height:0;border:5px solid ' + entry.color + ';overflow:hidden"></div></div></td>' +
'<td class="legendLabel">' + entry.label + '</td>'
);
}
if (rowStarted)
fragments.push('</tr>');
if (fragments.length == 0)
return;
var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>';
if (options.legend.container != null)
$(options.legend.container).html(table);
else {
var pos = "",
p = options.legend.position,
m = options.legend.margin;
if (m[0] == null)
m = [m, m];
if (p.charAt(0) == "n")
pos += 'top:' + (m[1] + plotOffset.top) + 'px;';
else if (p.charAt(0) == "s")
pos += 'bottom:' + (m[1] + plotOffset.bottom) + 'px;';
if (p.charAt(1) == "e")
pos += 'right:' + (m[0] + plotOffset.right) + 'px;';
else if (p.charAt(1) == "w")
pos += 'left:' + (m[0] + plotOffset.left) + 'px;';
var legend = $('<div class="legend">' + table.replace('style="', 'style="position:absolute;' + pos +';') + '</div>').appendTo(placeholder);
if (options.legend.backgroundOpacity != 0.0) {
// put in the transparent background
// separately to avoid blended labels and
// label boxes
var c = options.legend.backgroundColor;
if (c == null) {
c = options.grid.backgroundColor;
if (c && typeof c == "string")
c = $.color.parse(c);
else
c = $.color.extract(legend, 'background-color');
c.a = 1;
c = c.toString();
}
var div = legend.children();
$('<div style="position:absolute;width:' + div.width() + 'px;height:' + div.height() + 'px;' + pos +'background-color:' + c + ';"> </div>').prependTo(legend).css('opacity', options.legend.backgroundOpacity);
}
}
}
// interactive features
var highlights = [],
redrawTimeout = null;
// returns the data item the mouse is over, or null if none is found
function findNearbyItem(mouseX, mouseY, seriesFilter) {
var maxDistance = options.grid.mouseActiveRadius,
smallestDistance = maxDistance * maxDistance + 1,
item = null, foundPoint = false, i, j, ps;
for (i = series.length - 1; i >= 0; --i) {
if (!seriesFilter(series[i]))
continue;
var s = series[i],
axisx = s.xaxis,
axisy = s.yaxis,
points = s.datapoints.points,
mx = axisx.c2p(mouseX), // precompute some stuff to make the loop faster
my = axisy.c2p(mouseY),
maxx = maxDistance / axisx.scale,
maxy = maxDistance / axisy.scale;
ps = s.datapoints.pointsize;
// with inverse transforms, we can't use the maxx/maxy
// optimization, sadly
if (axisx.options.inverseTransform)
maxx = Number.MAX_VALUE;
if (axisy.options.inverseTransform)
maxy = Number.MAX_VALUE;
if (s.lines.show || s.points.show) {
for (j = 0; j < points.length; j += ps) {
var x = points[j], y = points[j + 1];
if (x == null)
continue;
// For points and lines, the cursor must be within a
// certain distance to the data point
if (x - mx > maxx || x - mx < -maxx ||
y - my > maxy || y - my < -maxy)
continue;
// We have to calculate distances in pixels, not in
// data units, because the scales of the axes may be different
var dx = Math.abs(axisx.p2c(x) - mouseX),
dy = Math.abs(axisy.p2c(y) - mouseY),
dist = dx * dx + dy * dy; // we save the sqrt
// use <= to ensure last point takes precedence
// (last generally means on top of)
if (dist < smallestDistance) {
smallestDistance = dist;
item = [i, j / ps];
}
}
}
if (s.bars.show && !item) { // no other point can be nearby
var barLeft, barRight;
switch (s.bars.align) {
case "left":
barLeft = 0;
break;
case "right":
barLeft = -s.bars.barWidth;
break;
default:
barLeft = -s.bars.barWidth / 2;
}
barRight = barLeft + s.bars.barWidth;
for (j = 0; j < points.length; j += ps) {
var x = points[j], y = points[j + 1], b = points[j + 2];
if (x == null)
continue;
// for a bar graph, the cursor must be inside the bar
if (series[i].bars.horizontal ?
(mx <= Math.max(b, x) && mx >= Math.min(b, x) &&
my >= y + barLeft && my <= y + barRight) :
(mx >= x + barLeft && mx <= x + barRight &&
my >= Math.min(b, y) && my <= Math.max(b, y)))
item = [i, j / ps];
}
}
}
if (item) {
i = item[0];
j = item[1];
ps = series[i].datapoints.pointsize;
return { datapoint: series[i].datapoints.points.slice(j * ps, (j + 1) * ps),
dataIndex: j,
series: series[i],
seriesIndex: i };
}
return null;
}
function onMouseMove(e) {
if (options.grid.hoverable)
triggerClickHoverEvent("plothover", e,
function (s) { return s["hoverable"] != false; });
}
function onMouseLeave(e) {
if (options.grid.hoverable)
triggerClickHoverEvent("plothover", e,
function (s) { return false; });
}
function onClick(e) {
triggerClickHoverEvent("plotclick", e,
function (s) { return s["clickable"] != false; });
}
// trigger click or hover event (they send the same parameters
// so we share their code)
function triggerClickHoverEvent(eventname, event, seriesFilter) {
var offset = eventHolder.offset(),
canvasX = event.pageX - offset.left - plotOffset.left,
canvasY = event.pageY - offset.top - plotOffset.top,
pos = canvasToAxisCoords({ left: canvasX, top: canvasY });
pos.pageX = event.pageX;
pos.pageY = event.pageY;
var item = findNearbyItem(canvasX, canvasY, seriesFilter);
if (item) {
// fill in mouse pos for any listeners out there
item.pageX = parseInt(item.series.xaxis.p2c(item.datapoint[0]) + offset.left + plotOffset.left, 10);
item.pageY = parseInt(item.series.yaxis.p2c(item.datapoint[1]) + offset.top + plotOffset.top, 10);
}
if (options.grid.autoHighlight) {
// clear auto-highlights
for (var i = 0; i < highlights.length; ++i) {
var h = highlights[i];
if (h.auto == eventname &&
!(item && h.series == item.series &&
h.point[0] == item.datapoint[0] &&
h.point[1] == item.datapoint[1]))
unhighlight(h.series, h.point);
}
if (item)
highlight(item.series, item.datapoint, eventname);
}
placeholder.trigger(eventname, [ pos, item ]);
}
function triggerRedrawOverlay() {
var t = options.interaction.redrawOverlayInterval;
if (t == -1) { // skip event queue
drawOverlay();
return;
}
if (!redrawTimeout)
redrawTimeout = setTimeout(drawOverlay, t);
}
function drawOverlay() {
redrawTimeout = null;
// draw highlights
octx.save();
overlay.clear();
octx.translate(plotOffset.left, plotOffset.top);
var i, hi;
for (i = 0; i < highlights.length; ++i) {
hi = highlights[i];
if (hi.series.bars.show)
drawBarHighlight(hi.series, hi.point);
else
drawPointHighlight(hi.series, hi.point);
}
octx.restore();
executeHooks(hooks.drawOverlay, [octx]);
}
function highlight(s, point, auto) {
if (typeof s == "number")
s = series[s];
if (typeof point == "number") {
var ps = s.datapoints.pointsize;
point = s.datapoints.points.slice(ps * point, ps * (point + 1));
}
var i = indexOfHighlight(s, point);
if (i == -1) {
highlights.push({ series: s, point: point, auto: auto });
triggerRedrawOverlay();
}
else if (!auto)
highlights[i].auto = false;
}
function unhighlight(s, point) {
if (s == null && point == null) {
highlights = [];
triggerRedrawOverlay();
return;
}
if (typeof s == "number")
s = series[s];
if (typeof point == "number") {
var ps = s.datapoints.pointsize;
point = s.datapoints.points.slice(ps * point, ps * (point + 1));
}
var i = indexOfHighlight(s, point);
if (i != -1) {
highlights.splice(i, 1);
triggerRedrawOverlay();
}
}
function indexOfHighlight(s, p) {
for (var i = 0; i < highlights.length; ++i) {
var h = highlights[i];
if (h.series == s && h.point[0] == p[0]
&& h.point[1] == p[1])
return i;
}
return -1;
}
function drawPointHighlight(series, point) {
var x = point[0], y = point[1],
axisx = series.xaxis, axisy = series.yaxis,
highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString();
if (x < axisx.min || x > axisx.max || y < axisy.min || y > axisy.max)
return;
var pointRadius = series.points.radius + series.points.lineWidth / 2;
octx.lineWidth = pointRadius;
octx.strokeStyle = highlightColor;
var radius = 1.5 * pointRadius;
x = axisx.p2c(x);
y = axisy.p2c(y);
octx.beginPath();
if (series.points.symbol == "circle")
octx.arc(x, y, radius, 0, 2 * Math.PI, false);
else
series.points.symbol(octx, x, y, radius, false);
octx.closePath();
octx.stroke();
}
function drawBarHighlight(series, point) {
var highlightColor = (typeof series.highlightColor === "string") ? series.highlightColor : $.color.parse(series.color).scale('a', 0.5).toString(),
fillStyle = highlightColor,
barLeft;
switch (series.bars.align) {
case "left":
barLeft = 0;
break;
case "right":
barLeft = -series.bars.barWidth;
break;
default:
barLeft = -series.bars.barWidth / 2;
}
octx.lineWidth = series.bars.lineWidth;
octx.strokeStyle = highlightColor;
drawBar(point[0], point[1], point[2] || 0, barLeft, barLeft + series.bars.barWidth,
function () { return fillStyle; }, series.xaxis, series.yaxis, octx, series.bars.horizontal, series.bars.lineWidth);
}
function getColorOrGradient(spec, bottom, top, defaultColor) {
if (typeof spec == "string")
return spec;
else {
// assume this is a gradient spec; IE currently only
// supports a simple vertical gradient properly, so that's
// what we support too
var gradient = ctx.createLinearGradient(0, top, 0, bottom);
for (var i = 0, l = spec.colors.length; i < l; ++i) {
var c = spec.colors[i];
if (typeof c != "string") {
var co = $.color.parse(defaultColor);
if (c.brightness != null)
co = co.scale('rgb', c.brightness);
if (c.opacity != null)
co.a *= c.opacity;
c = co.toString();
}
gradient.addColorStop(i / (l - 1), c);
}
return gradient;
}
}
}
// Add the plot function to the top level of the jQuery object
$.plot = function(placeholder, data, options) {
//var t0 = new Date();
var plot = new Plot($(placeholder), data, options, $.plot.plugins);
//(window.console ? console.log : alert)("time used (msecs): " + ((new Date()).getTime() - t0.getTime()));
return plot;
};
$.plot.version = "0.8.3";
$.plot.plugins = [];
// Also add the plot function as a chainable property
$.fn.plot = function(data, options) {
return this.each(function() {
$.plot(this, data, options);
});
};
// round to nearby lower multiple of base
function floorInBase(n, base) {
return base * Math.floor(n / base);
}
})(jQuery);