rails/app/assets/javascripts/flotr/flotr.js
/* $Id$ */
/**
* @projectDescription Flotr is a javascript plotting library based on the Prototype Javascript Framework.
* @author Bas Wenneker
* @license MIT License <http://www.opensource.org/licenses/mit-license.php>
* @version 0.2.0
*/
var Flotr = {
version: '%version%',
author: 'Bas Wenneker',
website: 'http://www.solutoire.com',
/**
* An object of the default registered graph types. Use Flotr.register(type, functionName)
* to add your own type.
*/
_registeredTypes:{
'lines': 'drawSeriesLines',
'points': 'drawSeriesPoints',
'bars': 'drawSeriesBars',
'candles': 'drawSeriesCandles',
'pie': 'drawSeriesPie'
},
/**
* Can be used to register your own chart type. Default types are 'lines', 'points' and 'bars'.
* This is still experimental.
* @todo Test and confirm.
* @param {String} type - type of chart, like 'pies', 'bars' etc.
* @param {String} functionName - Name of the draw function, like 'drawSeriesPies', 'drawSeriesBars' etc.
*/
register: function(type, functionName){
Flotr._registeredTypes[type] = functionName+'';
},
/**
* Draws the graph. This function is here for backwards compatibility with Flotr version 0.1.0alpha.
* You could also draw graphs by directly calling Flotr.Graph(element, data, options).
* @param {Element} el - element to insert the graph into
* @param {Object} data - an array or object of dataseries
* @param {Object} options - an object containing options
* @param {Class} _GraphKlass_ - (optional) Class to pass the arguments to, defaults to Flotr.Graph
* @return {Object} returns a new graph object and of course draws the graph.
*/
draw: function(el, data, options, _GraphKlass_){
_GraphKlass_ = _GraphKlass_ || Flotr.Graph;
return new _GraphKlass_(el, data, options);
},
/**
* Collects dataseries from input and parses the series into the right format. It returns an Array
* of Objects each having at least the 'data' key set.
* @param {Array, Object} data - Object or array of dataseries
* @return {Array} Array of Objects parsed into the right format ({(...,) data: [[x1,y1], [x2,y2], ...] (, ...)})
*/
getSeries: function(data){
return data.collect(function(serie){
var i;
serie = (serie.data) ? Object.clone(serie) : {'data': serie};
for (i = serie.data.length-1; i > -1; --i) {
serie.data[i][1] = (serie.data[i][1] === null ? null : parseFloat(serie.data[i][1]));
}
return serie;
});
},
/**
* Recursively merges two objects.
* @param {Object} src - source object (likely the object with the least properties)
* @param {Object} dest - destination object (optional, object with the most properties)
* @return {Object} recursively merged Object
*/
merge: function(src, dest){
var result = dest || {};
for(var i in src){
result[i] = (src[i] != null && typeof(src[i]) == 'object' && !(src[i].constructor == Array || src[i].constructor == RegExp) && !Object.isElement(src[i])) ? Flotr.merge(src[i], dest[i]) : result[i] = src[i];
}
return result;
},
/**
* Function calculates the ticksize and returns it.
* @param {Integer} noTicks - number of ticks
* @param {Integer} min - lower bound integer value for the current axis
* @param {Integer} max - upper bound integer value for the current axis
* @param {Integer} decimals - number of decimals for the ticks
* @return {Integer} returns the ticksize in pixels
*/
getTickSize: function(noTicks, min, max, decimals){
var delta = (max - min) / noTicks;
var magn = Flotr.getMagnitude(delta);
// Norm is between 1.0 and 10.0.
var norm = delta / magn;
var tickSize = 10;
if(norm < 1.5) tickSize = 1;
else if(norm < 2.25) tickSize = 2;
else if(norm < 3) tickSize = ((decimals == 0) ? 2 : 2.5);
else if(norm < 7.5) tickSize = 5;
return tickSize * magn;
},
/**
* Default tick formatter.
* @param {String, Integer} val - tick value integer
* @return {String} formatted tick string
*/
defaultTickFormatter: function(val){
return val+'';
},
/**
* Formats the mouse tracker values.
* @param {Object} obj - Track value Object {x:..,y:..}
* @return {String} Formatted track string
*/
defaultTrackFormatter: function(obj){
return '('+obj.x+', '+obj.y+')';
},
/**
* Formats the pies labels.
* @param {Object} slice - Slice object
* @return {String} Formatted pie label string
*/
defaultPieLabelFormatter: function(slice) {
return (slice.fraction*100).toFixed(2)+'%';
},
/**
* Utility function to convert file size values in bytes to kB, MB, ...
* @param value {Number} - The value to convert
* @param precision {Number} - The number of digits after the comma (default: 2)
* @param base {Number} - The base (default: 1024)
*/
convertToBytes: function(value, precision, base){
var sizes = ['Y','Z','E','P','T','G','M','k',''],
fractionSizes = ['y','z','a','f','p','n','ยต','m',''],
total = sizes.length;
base = base || 1024;
precision = precision || 2;
if (value == 0) return 0;
if (value > 1) {
while (total-- && (value > 1)) value /= base;
}
else {
sizes = fractionSizes;
total = sizes.length;
while (total-- && (value < 1)) value *= base;
}
return (Math.round(value * precision) / precision) + sizes[total];
},
/**
* Returns the magnitude of the input value.
* @param {Integer, Float} x - integer or float value
* @return {Integer, Float} returns the magnitude of the input value
*/
getMagnitude: function(x){
return Math.pow(10, Math.floor(Math.log(x) / Math.LN10));
},
toPixel: function(val){
return Math.floor(val)+0.5;//((val-Math.round(val) < 0.4) ? (Math.floor(val)-0.5) : val);
},
toRad: function(angle){
return -angle * (Math.PI/180);
},
/**
* Parses a color string and returns a corresponding Color.
* @param {String, Color} str - string thats representing a color
* @return {Color} returns a Color object or false
*/
parseColor: function(str){
if (str instanceof Flotr.Color) return str;
var result, Color = Flotr.Color;
// rgb(num,num,num)
if((result = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(str)))
return new Color(parseInt(result[1]), parseInt(result[2]), parseInt(result[3]));
// rgba(num,num,num,num)
if((result = /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 new Color(parseInt(result[1]), parseInt(result[2]), parseInt(result[3]), parseFloat(result[4]));
// rgb(num%,num%,num%)
if((result = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(str)))
return new Color(parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55);
// rgba(num%,num%,num%,num)
if((result = /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 new Color(parseFloat(result[1])*2.55, parseFloat(result[2])*2.55, parseFloat(result[3])*2.55, parseFloat(result[4]));
// #a0b1c2
if((result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(str)))
return new Color(parseInt(result[1],16), parseInt(result[2],16), parseInt(result[3],16));
// #fff
if((result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(str)))
return new Color(parseInt(result[1]+result[1],16), parseInt(result[2]+result[2],16), parseInt(result[3]+result[3],16));
// Otherwise, we're most likely dealing with a named color.
var name = str.strip().toLowerCase();
if(name == 'transparent'){
return new Color(255, 255, 255, 0);
}
return ((result = Color.lookupColors[name])) ? new Color(result[0], result[1], result[2]) : false;
},
/**
* Extracts the background-color of the passed element.
* @param {Element} element - The element from what the background color is extracted
* @return {String} color string
*/
extractColor: function(element){
var color;
// Loop until we find an element with a background color and stop when we hit the body element.
do {
color = element.getStyle('background-color').toLowerCase();
if(!(color == '' || color == 'transparent')) break;
element = element.up(0);
} while(!element.nodeName.match(/^body$/i));
// Catch Safari's way of signaling transparent.
return (color == 'rgba(0, 0, 0, 0)') ? 'transparent' : color;
}
};
/**
* Flotr Graph class that plots a graph on creation.
*/
Flotr.Graph = Class.create({
/**
* Flotr Graph constructor.
* @param {Element} el - element to insert the graph into
* @param {Object} data - an array or object of dataseries
* @param {Object} options - an object containing options
*/
initialize: function(el, data, options){
this.el = $(el);
if (!this.el) throw 'The target container doesn\'t exist';
this.data = data;
this.series = Flotr.getSeries(data);
this.setOptions(options);
// Initialize some variables
this.lastMousePos = { pageX: null, pageY: null };
this.selection = { first: { x: -1, y: -1}, second: { x: -1, y: -1} };
this.plotOffset = {left: 0, right: 0, top: 0, bottom: 0};
this.prevSelection = null;
this.selectionInterval = null;
this.ignoreClick = false;
this.prevHit = null;
// Create and prepare canvas.
this.constructCanvas();
// Add event handlers for mouse tracking, clicking and selection
this.initEvents();
this.findDataRanges();
this.calculateTicks(this.axes.x);
this.calculateTicks(this.axes.x2);
this.calculateTicks(this.axes.y);
this.calculateTicks(this.axes.y2);
this.calculateSpacing();
this.draw();
this.insertLegend();
// Graph and Data tabs
if (this.options.spreadsheet.show) this.constructTabs();
},
/**
* Sets options and initializes some variables and color specific values, used by the constructor.
* @param {Object} opts - options object
*/
setOptions: function(opts){
var options = {
colors: ['#00A8F0', '#C0D800', '#CB4B4B', '#4DA74D', '#9440ED'], //=> The default colorscheme. When there are > 5 series, additional colors are generated.
title: null,
subtitle: null,
legend: {
show: true, // => setting to true will show the legend, hide otherwise
noColumns: 1, // => number of colums in legend table // @todo: doesn't work for HtmlText = false
labelFormatter: Prototype.K, // => fn: string -> string
labelBoxBorderColor: '#CCCCCC', // => border color for the little label boxes
labelBoxWidth: 14,
labelBoxHeight: 10,
labelBoxMargin: 5,
container: null, // => container (as jQuery object) to put legend in, null means default on top of graph
position: 'nw', // => 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, set to 1 for a solid background
},
xaxis: {
ticks: null, // => format: either [1, 3] or [[1, 'a'], 3]
showLabels: true, // => setting to true will show the axis ticks labels, hide otherwise
labelsAngle: 0, // => labels' angle, in degrees
title: null, // => axis title
titleAngle: 0, // => axis title's angle, in degrees
noTicks: 5, // => number of ticks for automagically generated ticks
tickFormatter: Flotr.defaultTickFormatter, // => fn: number -> string
tickDecimals: null, // => no. of decimals, null means auto
min: null, // => min. value to show, null means set automatically
max: null, // => max. value to show, null means set automatically
autoscaleMargin: 0, // => margin in % to add if auto-setting min/max
color: null
},
x2axis: {},
yaxis: {
ticks: null, // => format: either [1, 3] or [[1, 'a'], 3]
showLabels: true, // => setting to true will show the axis ticks labels, hide otherwise
labelsAngle: 0, // => labels' angle, in degrees
title: null, // => axis title
titleAngle: 90, // => axis title's angle, in degrees
noTicks: 5, // => number of ticks for automagically generated ticks
tickFormatter: Flotr.defaultTickFormatter, // => fn: number -> string
tickDecimals: null, // => no. of decimals, null means auto
min: null, // => min. value to show, null means set automatically
max: null, // => max. value to show, null means set automatically
autoscaleMargin: 0, // => margin in % to add if auto-setting min/max
color: null
},
y2axis: {
titleAngle: 270
},
points: {
show: false, // => setting to true will show points, false will hide
radius: 3, // => point radius (pixels)
lineWidth: 2, // => line width in pixels
fill: true, // => true to fill the points with a color, false for (transparent) no fill
fillColor: '#FFFFFF', // => fill color
fillOpacity: 0.4
},
lines: {
show: false, // => setting to true will show lines, false will hide
lineWidth: 2, // => line width in pixels
fill: false, // => true to fill the area from the line to the x axis, false for (transparent) no fill
fillColor: null, // => fill color
fillOpacity: 0.4 // => opacity of the fill color, set to 1 for a solid fill, 0 hides the fill
},
bars: {
show: false, // => setting to true will show bars, false will hide
lineWidth: 2, // => in pixels
barWidth: 1, // => in units of the x axis
fill: true, // => true to fill the area from the line to the x axis, false for (transparent) no fill
fillColor: null, // => fill color
fillOpacity: 0.4, // => opacity of the fill color, set to 1 for a solid fill, 0 hides the fill
horizontal: false,
stacked: false,
centered: true // => center the bars to their x axis value
},
candles: {
show: false, // => setting to true will show candle sticks, false will hide
lineWidth: 1, // => in pixels
wickLineWidth: 1, // => in pixels
candleWidth: 0.6, // => in units of the x axis
fill: true, // => true to fill the area from the line to the x axis, false for (transparent) no fill
upFillColor: '#00A8F0',// => up sticks fill color
downFillColor: '#CB4B4B',// => down sticks fill color
fillOpacity: 0.5, // => opacity of the fill color, set to 1 for a solid fill, 0 hides the fill
barcharts: false // => draw as barcharts (not standard bars but financial barcharts)
},
pie: {
show: false, // => setting to true will show bars, false will hide
lineWidth: 1, // => in pixels
fill: true, // => true to fill the area from the line to the x axis, false for (transparent) no fill
fillColor: null, // => fill color
fillOpacity: 0.6, // => opacity of the fill color, set to 1 for a solid fill, 0 hides the fill
explode: 6, // => the number of pixels the splices will be far from the center
sizeRatio: 0.6, // => the size ratio of the pie relative to the plot
startAngle: Math.PI/4, // => the first slice start angle
labelFormatter: Flotr.defaultPieLabelFormatter,
pie3D: false, // => whether to draw the pie in 3 dimenstions or not (ineffective)
pie3DviewAngle: (Math.PI/2 * 0.8),
pie3DspliceThickness: 20
},
grid: {
color: '#545454', // => primary color used for outline and labels
backgroundColor: null, // => null for transparent, else color
tickColor: '#DDDDDD', // => color used for the ticks
labelMargin: 3, // => margin in pixels
verticalLines: true, // => whether to show gridlines in vertical direction
horizontalLines: true, // => whether to show gridlines in horizontal direction
outlineWidth: 2 // => width of the grid outline/border in pixels
},
selection: {
mode: null, // => one of null, 'x', 'y' or 'xy'
color: '#B6D9FF', // => selection box color
fps: 20 // => frames-per-second
},
crosshair: {
mode: null, // => one of null, 'x', 'y' or 'xy'
color: '#FF0000', // => crosshair color
hideCursor: true // => hide the cursor when the crosshair is shown
},
mouse: {
track: false, // => true to track the mouse, no tracking otherwise
position: 'se', // => position of the value box (default south-east)
relative: false, // => next to the mouse cursor
trackFormatter: Flotr.defaultTrackFormatter, // => formats the values in the value box
margin: 5, // => margin in pixels of the valuebox
lineColor: '#FF3F19', // => line color of points that are drawn when mouse comes near a value of a series
trackDecimals: 1, // => decimals for the track values
sensibility: 2, // => the lower this number, the more precise you have to aim to show a value
radius: 3, // => radius of the track point
fillColor: null, // => color to fill our select bar with only applies to bar and similar graphs (only bars for now)
fillOpacity: 0.4 // => opacity of the fill color, set to 1 for a solid fill, 0 hides the fill
},
shadowSize: 4, // => size of the 'fake' shadow
defaultType: 'lines', // => default series type
HtmlText: true, // => wether to draw the text using HTML or on the canvas
fontSize: 7.5, // => canvas' text font size
spreadsheet: {
show: false, // => show the data grid using two tabs
tabGraphLabel: 'Graph',
tabDataLabel: 'Data',
toolbarDownload: 'Download CSV', // @todo: add language support
toolbarSelectAll: 'Select all'
}
};
options.x2axis = Object.extend(Object.clone(options.xaxis), options.x2axis);
options.y2axis = Object.extend(Object.clone(options.yaxis), options.y2axis);
this.options = Flotr.merge((opts || {}), options);
// The 4 axes of the plot
this.axes = {
x: {options: this.options.xaxis, n: 1},
x2: {options: this.options.x2axis, n: 2},
y: {options: this.options.yaxis, n: 1},
y2: {options: this.options.y2axis, n: 2}
};
// Initialize some variables used throughout this function.
var assignedColors = [],
colors = [],
ln = this.series.length,
neededColors = this.series.length,
oc = this.options.colors,
usedColors = [],
variation = 0,
c, i, j, s, tooClose;
// Collect user-defined colors from series.
for(i = neededColors - 1; i > -1; --i){
c = this.series[i].color;
if(c != null){
--neededColors;
if(Object.isNumber(c)) assignedColors.push(c);
else usedColors.push(Flotr.parseColor(c));
}
}
// Calculate the number of colors that need to be generated.
for(i = assignedColors.length - 1; i > -1; --i)
neededColors = Math.max(neededColors, assignedColors[i] + 1);
// Generate needed number of colors.
for(i = 0; colors.length < neededColors;){
c = (oc.length == i) ? new Flotr.Color(100, 100, 100) : Flotr.parseColor(oc[i]);
// Make sure each serie gets a different color.
var sign = variation % 2 == 1 ? -1 : 1;
var factor = 1 + sign * Math.ceil(variation / 2) * 0.2;
c.scale(factor, factor, factor);
/**
* @todo if we're getting too close to something else, we should probably skip this one
*/
colors.push(c);
if(++i >= oc.length){
i = 0;
++variation;
}
}
// Fill the options with the generated colors.
for(i = 0, j = 0; i < ln; ++i){
s = this.series[i];
// Assign the color.
if(s.color == null){
s.color = colors[j++].toString();
}else if(Object.isNumber(s.color)){
s.color = colors[s.color].toString();
}
// Every series needs an axis
if (!s.xaxis) s.xaxis = this.axes.x;
if (s.xaxis == 1) s.xaxis = this.axes.x;
else if (s.xaxis == 2) s.xaxis = this.axes.x2;
if (!s.yaxis) s.yaxis = this.axes.y;
if (s.yaxis == 1) s.yaxis = this.axes.y;
else if (s.yaxis == 2) s.yaxis = this.axes.y2;
// Apply missing options to the series.
s.lines = Object.extend(Object.clone(this.options.lines), s.lines);
s.points = Object.extend(Object.clone(this.options.points), s.points);
s.bars = Object.extend(Object.clone(this.options.bars), s.bars);
s.candles = Object.extend(Object.clone(this.options.candles), s.candles);
s.pie = Object.extend(Object.clone(this.options.pie), s.pie);
s.mouse = Object.extend(Object.clone(this.options.mouse), s.mouse);
if(s.shadowSize == null) s.shadowSize = this.options.shadowSize;
}
},
/**
* Initializes the canvas and it's overlay canvas element. When the browser is IE, this makes use
* of excanvas. The overlay canvas is inserted for displaying interactions. After the canvas elements
* are created, the elements are inserted into the container element.
*/
constructCanvas: function(){
var el = this.el,
size, c, oc;
// The old canvases are retrieved to avoid memory leaks ...
this.canvas = el.select('.flotr-canvas')[0];
this.overlay = el.select('.flotr-overlay')[0];
// ... and all the child elements are removed
el.childElements().invoke('remove');
// For positioning labels and overlay.
el.setStyle({position:'relative', cursor:'default'});
this.canvasWidth = el.getWidth();
this.canvasHeight = el.getHeight();
size = {'width': this.canvasWidth, 'height': this.canvasHeight};
if(this.canvasWidth <= 0 || this.canvasHeight <= 0){
throw 'Invalid dimensions for plot, width = ' + this.canvasWidth + ', height = ' + this.canvasHeight;
}
// Insert main canvas.
if (!this.canvas) {
c = this.canvas = $(document.createElement('canvas'));
c.className = 'flotr-canvas';
c.writeAttribute('style', 'position:absolute;left:0px;top:0px;');
}
c = this.canvas.writeAttribute(size).show();
el.insert(c);
// Insert overlay canvas for interactive features.
if (!this.overlay) {
oc = this.overlay = $(document.createElement('canvas'));
oc.className = 'flotr-overlay';
oc.writeAttribute('style', 'position:absolute;left:0px;top:0px;');
}
oc = this.overlay.writeAttribute(size).show();
el.insert(oc);
if(Prototype.Browser.IE){
window.G_vmlCanvasManager.initElement(c);
window.G_vmlCanvasManager.initElement(oc);
}
this.ctx = c.getContext('2d');
this.octx = oc.getContext('2d');
// Enable text functions
this.textEnabled = !!this.ctx.drawText;
},
/**
* Calculates a text box dimensions, wether it is drawn on the canvas or inserted into the DOM
* @param {String} text - The text in the box
* @param {Object} canvasStyle - An object containing the style for the text if drawn on the canvas
* @param {String} HtmlStyle - A CSS style for the text if inserted into the DOM
* @param {Object} className - A CSS className for the text if inserted into the DOM
*/
getTextDimensions: function(text, canvasStyle, HtmlStyle, className) {
if (!text) return {width:0, height:0};
if (!this.options.HtmlText && this.textEnabled) {
var bounds = this.ctx.getTextBounds(text, canvasStyle);
return {
width: bounds.width+2,
height: bounds.height+6
};
}
else {
var dummyDiv = this.el.insert('<div style="position:absolute;top:-10000px;'+HtmlStyle+'" class="'+className+' flotr-dummy-div">' + text + '</div>').select(".flotr-dummy-div")[0];
dim = dummyDiv.getDimensions();
dummyDiv.remove();
return dim;
}
},
/**
* Builds a matrix of the data to make the correspondance between the x values and the y values :
* X value => Y values from the axes
* @return {Array} The data grid
*/
loadDataGrid: function(){
if (this.seriesData) return this.seriesData;
var s = this.series,
dg = [];
/* The data grid is a 2 dimensions array. There is a row for each X value.
* Each row contains the x value and the corresponding y value for each serie ('undefined' if there isn't one)
**/
for(i = 0; i < s.length; ++i){
s[i].data.each(function(v) {
var x = v[0],
y = v[1],
r = dg.find(function(row) {return row[0] == x});
if (r) r[i+1] = y;
else {
var newRow = [];
newRow[0] = x;
newRow[i+1] = y;
dg.push(newRow);
}
});
}
// The data grid is sorted by x value
dg = dg.sortBy(function(v) {
return v[0];
});
return this.seriesData = dg;
},
/**
* Shows the specified tab, by its name
* @todo make a tab manager (Flotr.Tabs)
* @param {String} tabName - The tab name
*/
showTab: function(tabName){
var elementsClassNames = 'canvas, .flotr-labels, .flotr-legend, .flotr-legend-bg, .flotr-title, .flotr-subtitle';
switch(tabName) {
case 'graph':
this.datagrid.up().hide();
this.el.select(elementsClassNames).invoke('show');
this.tabs.data.removeClassName('selected');
this.tabs.graph.addClassName('selected');
break;
case 'data':
this.constructDataGrid();
this.datagrid.up().show();
this.el.select(elementsClassNames).invoke('hide');
this.tabs.data.addClassName('selected');
this.tabs.graph.removeClassName('selected');
break;
}
},
/**
* Builds the tabs in the DOM
*/
constructTabs: function(){
var tabsContainer = new Element('div', {className:'flotr-tabs-group', style:'position:absolute;left:0px;top:'+this.canvasHeight+'px;width:'+this.canvasWidth+'px;'});
this.el.insert({bottom: tabsContainer});
this.tabs = {
graph: new Element('div', {className:'flotr-tab selected', style:'float:left;'}).update(this.options.spreadsheet.tabGraphLabel),
data: new Element('div', {className:'flotr-tab', style:'float:left;'}).update(this.options.spreadsheet.tabDataLabel)
};
tabsContainer.insert(this.tabs.graph).insert(this.tabs.data);
this.el.setStyle({height: this.canvasHeight+this.tabs.data.getHeight()+2+'px'});
this.tabs.graph.observe('click', (function() {this.showTab('graph')}).bind(this));
this.tabs.data.observe('click', (function() {this.showTab('data')}).bind(this));
},
/**
* Constructs the data table for the spreadsheet
* @todo make a spreadsheet manager (Flotr.Spreadsheet)
* @return {Element} The resulting table element
*/
constructDataGrid: function(){
// If the data grid has already been built, nothing to do here
if (this.datagrid) return this.datagrid;
var i, j,
s = this.series,
datagrid = this.loadDataGrid(),
t = this.datagrid = new Element('table', {className:'flotr-datagrid', style:'height:100px;'}),
colgroup = ['<colgroup><col />'];
// First row : series' labels
var html = ['<tr class="first-row">'];
html.push('<th> </th>');
for (i = 0; i < s.length; ++i) {
html.push('<th scope="col">'+(s[i].label || String.fromCharCode(65+i))+'</th>');
colgroup.push('<col />');
}
html.push('</tr>');
// Data rows
for (j = 0; j < datagrid.length; ++j) {
html.push('<tr>');
for (i = 0; i < s.length+1; ++i) {
var tag = 'td';
var content = (datagrid[j][i] != null ? Math.round(datagrid[j][i]*100000)/100000 : '');
if (i == 0) {
tag = 'th';
var label;
if(this.options.xaxis.ticks) {
var tick = this.options.xaxis.ticks.find(function (x) { return x[0] == datagrid[j][i] });
if (tick) label = tick[1];
}
else {
label = this.options.xaxis.tickFormatter(content);
}
if (label) content = label;
}
html.push('<'+tag+(tag=='th'?' scope="row"':'')+'>'+content+'</'+tag+'>');
}
html.push('</tr>');
}
colgroup.push('</colgroup>');
t.update(colgroup.join('')+html.join(''));
if (!Prototype.Browser.IE) {
t.select('td').each(function(td) {
td.observe('mouseover', function(e){
td = e.element();
var siblings = td.previousSiblings();
t.select('th[scope=col]')[siblings.length-1].addClassName('hover');
t.select('colgroup col')[siblings.length].addClassName('hover');
});
td.observe('mouseout', function(){
t.select('colgroup col.hover, th.hover').each(function(e){e.removeClassName('hover')});
});
});
}
var toolbar = new Element('div', {className: 'flotr-datagrid-toolbar'}).
insert(new Element('button', {type:'button', className:'flotr-datagrid-toolbar-button'}).update(this.options.spreadsheet.toolbarDownload).observe('click', this.downloadCSV.bind(this))).
insert(new Element('button', {type:'button', className:'flotr-datagrid-toolbar-button'}).update(this.options.spreadsheet.toolbarSelectAll).observe('click', this.selectAllData.bind(this)));
var container = new Element('div', {className:'flotr-datagrid-container', style:'left:0px;top:0px;width:'+this.canvasWidth+'px;height:'+this.canvasHeight+'px;overflow:auto;'});
container.insert(toolbar);
t.wrap(container.hide());
this.el.insert(container);
return t;
},
/**
* Selects the data table in the DOM for copy/paste
*/
selectAllData: function(){
if (this.tabs) {
var selection, range, doc, win, node = this.constructDataGrid();
this.showTab('data');
// deferred to be able to select the table
(function () {
if ((doc = node.ownerDocument) && (win = doc.defaultView) &&
win.getSelection && doc.createRange &&
(selection = window.getSelection()) &&
selection.removeAllRanges) {
range = doc.createRange();
range.selectNode(node);
selection.removeAllRanges();
selection.addRange(range);
}
else if (document.body && document.body.createTextRange &&
(range = document.body.createTextRange())) {
range.moveToElementText(node);
range.select();
}
}).defer();
return true;
}
else return false;
},
/**
* Converts the data into CSV in order to download a file
*/
downloadCSV: function(){
var i, csv = '"x"',
series = this.series,
dg = this.loadDataGrid();
for (i = 0; i < series.length; ++i) {
csv += '%09"'+(series[i].label || String.fromCharCode(65+i))+'"'; // \t
}
csv += "%0D%0A"; // \r\n
for (i = 0; i < dg.length; ++i) {
if (this.options.xaxis.ticks) {
var tick = this.options.xaxis.ticks.find(function (x) { return x[0] == dg[i][0] });
if (tick) dg[i][0] = tick[1];
}
else {
dg[i][0] = this.options.xaxis.tickFormatter(dg[i][0]);
}
csv += dg[i].join('%09')+"%0D%0A"; // \t and \r\n
}
if (Prototype.Browser.IE) {
csv = csv.gsub('%09', '\t').gsub('%0A', '\n').gsub('%0D', '\r');
window.open().document.write(csv);
}
else window.open('data:text/csv,'+csv);
},
/**
* Initializes event some handlers.
*/
initEvents: function () {
//@todo: maybe stopObserving with only flotr functions
this.overlay.stopObserving();
this.overlay.observe('mousedown', this.mouseDownHandler.bind(this));
this.overlay.observe('mousemove', this.mouseMoveHandler.bind(this));
this.overlay.observe('click', this.clickHandler.bind(this));
},
/**
* Function determines the min and max values for the xaxis and yaxis.
*/
findDataRanges: function(){
var s = this.series,
a = this.axes;
a.x.datamin = a.x.datamax =
a.x2.datamin = a.x2.datamax =
a.y.datamin = a.y.datamax =
a.y2.datamin = a.y2.datamax = 0;
if(s.length > 0){
var i, j, h, x, y, data, xaxis, yaxis;
// Get datamin, datamax start values
for(i = 0; i < s.length; ++i) {
data = s[i].data,
xaxis = s[i].xaxis,
yaxis = s[i].yaxis;
if (data.length > 0 && !s[i].hide) {
if (!xaxis.used) xaxis.datamin = xaxis.datamax = data[0][0];
if (!yaxis.used) yaxis.datamin = yaxis.datamax = data[0][1];
xaxis.used = true;
yaxis.used = true;
for(h = data.length - 1; h > -1; --h){
x = data[h][0];
if(x < xaxis.datamin) xaxis.datamin = x;
else if(x > xaxis.datamax) xaxis.datamax = x;
for(j = 1; j < data[h].length; j++){
y = data[h][j];
if(y < yaxis.datamin) yaxis.datamin = y;
else if(y > yaxis.datamax) yaxis.datamax = y;
}
}
}
}
}
this.findXAxesValues();
this.calculateRange(a.x);
this.extendXRangeIfNeededByBar(a.x);
if (a.x2.used) {
this.calculateRange(a.x2);
this.extendXRangeIfNeededByBar(a.x2);
}
this.calculateRange(a.y);
this.extendYRangeIfNeededByBar(a.y);
if (a.y2.used) {
this.calculateRange(a.y2);
this.extendYRangeIfNeededByBar(a.y2);
}
},
/**
* Calculates the range of an axis to apply autoscaling.
* @param {Object} axis - The axis for what the range will be calculated
*/
calculateRange: function(axis){
var o = axis.options,
min = o.min != null ? o.min : axis.datamin,
max = o.max != null ? o.max : axis.datamax,
margin;
if(max - min == 0.0){
var widen = (max == 0.0) ? 1.0 : 0.01;
min -= widen;
max += widen;
}
axis.tickSize = Flotr.getTickSize(o.noTicks, min, max, o.tickDecimals);
// Autoscaling.
if(o.min == null){
// Add a margin.
margin = o.autoscaleMargin;
if(margin != 0){
min -= axis.tickSize * margin;
// Make sure we don't go below zero if all values are positive.
if(min < 0 && axis.datamin >= 0) min = 0;
min = axis.tickSize * Math.floor(min / axis.tickSize);
}
}
if(o.max == null){
margin = o.autoscaleMargin;
if(margin != 0){
max += axis.tickSize * margin;
if(max > 0 && axis.datamax <= 0) max = 0;
max = axis.tickSize * Math.ceil(max / axis.tickSize);
}
}
axis.min = min;
axis.max = max;
},
/**
* Bar series autoscaling in x direction.
* @param {Object} axis - The axis to extend if needed
*/
extendXRangeIfNeededByBar: function(axis){
if(axis.options.max == null){
var newmin = axis.min,
newmax = axis.max,
i, s, b, c,
stackedSums = [],
lastSerie = null;
for(i = 0; i < this.series.length; ++i){
s = this.series[i];
b = s.bars;
c = s.candles;
if(s.xaxis == axis) {
// For candle sticks and centered bars
if (c.show || (b.centered && b.show)) {
// We don't use c.candleWidth in order not to stick the borders
newmax = Math.max(axis.datamax + 0.5, newmax);
newmin = Math.min(axis.datamin - 0.5, newmin);
}
if (b.show) {
// For normal vertical bars
if (!b.horizontal && (b.barWidth + axis.datamax > newmax))
newmax = axis.max + (b.centered ? b.barWidth/2 : b.barWidth);
// For horizontal stacked bars
if(b.stacked && b.horizontal){
for (j = 0; j < s.data.length; j++) {
if (b.show && b.stacked) {
var x = s.data[j][0]+'';
stackedSums[x] = (stackedSums[x] || 0) + s.data[j][1];
lastSerie = s;
}
}
for (var j in stackedSums) {
newmax = Math.max(stackedSums[j], newmax);
}
}
}
}
}
axis.lastSerie = lastSerie;
axis.max = newmax;
axis.min = newmin;
}
},
/**
* Bar series autoscaling in y direction.
* @param {Object} axis - The axis to extend if needed
*/
extendYRangeIfNeededByBar: function(axis){
if(axis.options.max == null){
var newmax = axis.max,
i, s, b, c,
stackedSums = {},
lastSerie = null;
for(i = 0; i < this.series.length; ++i){
s = this.series[i];
b = s.bars;
c = s.candles;
if (s.yaxis == axis && b.show && !s.hide) {
// For normal horizontal bars and candle sticks
if (b.horizontal && (b.barWidth + axis.datamax > newmax) || (c.candleWidth + axis.datamax > newmax)){
newmax = axis.max + b.barWidth;
}
// For vertical stacked bars
if(b.stacked && !b.horizontal){
for (j = 0; j < s.data.length; j++) {
if (s.bars.show && s.bars.stacked) {
var x = s.data[j][0]+'';
stackedSums[x] = (stackedSums[x] || 0) + s.data[j][1];
lastSerie = s;
}
}
for (var j in stackedSums) {
newmax = Math.max(stackedSums[j], newmax);
}
}
}
}
axis.lastSerie = lastSerie;
axis.max = newmax;
}
},
/**
* Find every values of the x axes
*/
findXAxesValues: function(){
for(i = this.series.length-1; i > -1 ; --i){
s = this.series[i];
s.xaxis.values = s.xaxis.values || {};
for (j = s.data.length-1; j > -1 ; --j){
s.xaxis.values[s.data[j][0]+''] = {};
}
}
},
/**
* Calculate axis ticks.
* @param {Object} axis - The axis for what the ticks will be calculated
*/
calculateTicks: function(axis){
var o = axis.options, i, v;
axis.ticks = [];
if(o.ticks){
var ticks = o.ticks, t, label;
if(Object.isFunction(ticks)){
ticks = ticks({min: axis.min, max: axis.max});
}
// Clean up the user-supplied ticks, copy them over.
for(i = 0; i < ticks.length; ++i){
t = ticks[i];
if(typeof(t) == 'object'){
v = t[0];
label = (t.length > 1) ? t[1] : o.tickFormatter(v);
}else{
v = t;
label = o.tickFormatter(v);
}
axis.ticks[i] = { v: v, label: label };
}
}
else {
// Round to nearest multiple of tick size.
var start = axis.tickSize * Math.ceil(axis.min / axis.tickSize),
decimals;
// Then store all possible ticks.
for(i = 0; start + i * axis.tickSize <= axis.max; ++i){
v = start + i * axis.tickSize;
// Round (this is always needed to fix numerical instability).
decimals = o.tickDecimals;
if(decimals == null) decimals = 1 - Math.floor(Math.log(axis.tickSize) / Math.LN10);
if(decimals < 0) decimals = 0;
v = v.toFixed(decimals);
axis.ticks.push({ v: v, label: o.tickFormatter(v) });
}
}
},
/**
* Calculates axis label sizes.
*/
calculateSpacing: function(){
var a = this.axes,
options = this.options,
series = this.series,
margin = options.grid.labelMargin,
x = a.x,
x2 = a.x2,
y = a.y,
y2 = a.y2,
maxOutset = 2,
i, j, l, dim;
// Labels width and height
[x, x2, y, y2].each(function(axis) {
var maxLabel = '';
if (axis.options.showLabels) {
for(i = 0; i < axis.ticks.length; ++i){
l = axis.ticks[i].label.length;
if(l > maxLabel.length){
maxLabel = axis.ticks[i].label;
}
}
}
axis.maxLabel = this.getTextDimensions(maxLabel, {size:options.fontSize, angle: Flotr.toRad(axis.options.labelsAngle)}, 'font-size:smaller;', 'flotr-grid-label');
axis.titleSize = this.getTextDimensions(axis.options.title, {size: options.fontSize*1.2, angle: Flotr.toRad(axis.options.titleAngle)}, 'font-weight:bold;', 'flotr-axis-title');
}, this);
// Title height
dim = this.getTextDimensions(options.title, {size: options.fontSize*1.5}, 'font-size:1em;font-weight:bold;', 'flotr-title');
this.titleHeight = dim.height;
// Subtitle height
dim = this.getTextDimensions(options.subtitle, {size: options.fontSize}, 'font-size:smaller;', 'flotr-subtitle');
this.subtitleHeight = dim.height;
// Grid outline line width.
if(options.show){
maxOutset = Math.max(maxOutset, options.points.radius + options.points.lineWidth/2);
}
for(j = 0; j < options.length; ++j){
if (series[j].points.show){
maxOutset = Math.max(maxOutset, series[j].points.radius + series[j].points.lineWidth/2);
}
}
var p = this.plotOffset;
p.bottom += (x.options.showLabels ? (x.maxLabel.height + margin) : 0) +
(x.options.title ? (x.titleSize.height + margin) : 0) + maxOutset;
p.top += (x2.options.showLabels ? (x2.maxLabel.height + margin) : 0) +
(x2.options.title ? (x2.titleSize.height + margin) : 0) + this.subtitleHeight + this.titleHeight + maxOutset;
p.left += (y.options.showLabels ? (y.maxLabel.width + margin) : 0) +
(y.options.title ? (y.titleSize.width + margin) : 0) + maxOutset;
p.right += (y2.options.showLabels ? (y2.maxLabel.width + margin) : 0) +
(y2.options.title ? (y2.titleSize.width + margin) : 0) + maxOutset;
p.top = Math.floor(p.top); // In order the outline not to be blured
this.plotWidth = this.canvasWidth - p.left - p.right;
this.plotHeight = this.canvasHeight - p.bottom - p.top;
x.scale = this.plotWidth / (x.max - x.min);
x2.scale = this.plotWidth / (x2.max - x2.min);
y.scale = this.plotHeight / (y.max - y.min);
y2.scale = this.plotHeight / (y2.max - y2.min);
},
/**
* Draws grid, labels and series.
*/
draw: function() {
this.drawGrid();
this.drawLabels();
this.drawTitles();
if(this.series.length){
this.el.fire('flotr:beforedraw', [this.series, this]);
for(var i = 0; i < this.series.length; i++){
if (!this.series[i].hide)
this.drawSeries(this.series[i]);
}
}
this.el.fire('flotr:afterdraw', [this.series, this]);
},
/**
* Translates absolute horizontal x coordinates to relative coordinates.
* @param {Integer} x - absolute integer x coordinate
* @param {Object} axis - the reference axis
* @return {Integer} translated relative x coordinate
*/
tHoz: function(x, axis){
axis = axis || this.axes.x;
return (x - axis.min) * axis.scale;
},
/**
* Translates absolute vertical x coordinates to relative coordinates.
* @param {Integer} y - absolute integer y coordinate
* @param {Object} axis - the reference axis
* @return {Integer} translated relative y coordinate
*/
tVert: function(y, axis){
axis = axis || this.axes.y;
return this.plotHeight - (y - axis.min) * axis.scale;
},
/**
* Draws a grid for the graph.
*/
drawGrid: function(){
var v, o = this.options,
ctx = this.ctx;
if(o.grid.verticalLines || o.grid.horizontalLines){
this.el.fire('flotr:beforegrid', [this.axes.x, this.axes.y, o, this]);
}
ctx.save();
ctx.translate(this.plotOffset.left, this.plotOffset.top);
// Draw grid background, if present in options.
if(o.grid.backgroundColor != null){
ctx.fillStyle = o.grid.backgroundColor;
ctx.fillRect(0, 0, this.plotWidth, this.plotHeight);
}
// Draw grid lines in vertical direction.
ctx.lineWidth = 1;
ctx.strokeStyle = o.grid.tickColor;
ctx.beginPath();
if(o.grid.verticalLines){
for(var i = 0; i < this.axes.x.ticks.length; ++i){
v = this.axes.x.ticks[i].v;
// Don't show lines on upper and lower bounds.
if ((v == this.axes.x.min || v == this.axes.x.max) && o.grid.outlineWidth != 0)
continue;
ctx.moveTo(Math.floor(this.tHoz(v)) + ctx.lineWidth/2, 0);
ctx.lineTo(Math.floor(this.tHoz(v)) + ctx.lineWidth/2, this.plotHeight);
}
}
// Draw grid lines in horizontal direction.
if(o.grid.horizontalLines){
for(var j = 0; j < this.axes.y.ticks.length; ++j){
v = this.axes.y.ticks[j].v;
// Don't show lines on upper and lower bounds.
if ((v == this.axes.y.min || v == this.axes.y.max) && o.grid.outlineWidth != 0)
continue;
ctx.moveTo(0, Math.floor(this.tVert(v)) + ctx.lineWidth/2);
ctx.lineTo(this.plotWidth, Math.floor(this.tVert(v)) + ctx.lineWidth/2);
}
}
ctx.stroke();
// Draw axis/grid border.
if(o.grid.outlineWidth != 0) {
ctx.lineWidth = o.grid.outlineWidth;
ctx.strokeStyle = o.grid.color;
ctx.lineJoin = 'round';
ctx.strokeRect(0, 0, this.plotWidth, this.plotHeight);
}
ctx.restore();
if(o.grid.verticalLines || o.grid.horizontalLines){
this.el.fire('flotr:aftergrid', [this.axes.x, this.axes.y, o, this]);
}
},
/**
* Draws labels for x and y axis.
*/
drawLabels: function(){
// Construct fixed width label boxes, which can be styled easily.
var noLabels = 0, axis,
xBoxWidth, i, html, tick,
options = this.options,
ctx = this.ctx,
a = this.axes;
for(i = 0; i < a.x.ticks.length; ++i){
if (a.x.ticks[i].label) {
++noLabels;
}
}
xBoxWidth = this.plotWidth / noLabels;
if (!options.HtmlText && this.textEnabled) {
var style = {
size: options.fontSize,
adjustAlign: true
};
// Add x labels.
axis = a.x;
style.color = axis.options.color || options.grid.color;
for(i = 0; i < axis.ticks.length && axis.options.showLabels && axis.used; ++i){
tick = axis.ticks[i];
if(!tick.label || tick.label.length == 0) continue;
style.angle = Flotr.toRad(axis.options.labelsAngle);
style.halign = 'c';
style.valign = 't';
ctx.drawText(
tick.label,
this.plotOffset.left + this.tHoz(tick.v, axis),
this.plotOffset.top + this.plotHeight + options.grid.labelMargin,
style
);
}
// Add x2 labels.
axis = a.x2;
style.color = axis.options.color || options.grid.color;
for(i = 0; i < axis.ticks.length && axis.options.showLabels && axis.used; ++i){
tick = axis.ticks[i];
if(!tick.label || tick.label.length == 0) continue;
style.angle = Flotr.toRad(axis.options.labelsAngle);
style.halign = 'c';
style.valign = 'b';
ctx.drawText(
tick.label,
this.plotOffset.left + this.tHoz(tick.v, axis),
this.plotOffset.top + options.grid.labelMargin,
style
);
}
// Add y labels.
axis = a.y;
style.color = axis.options.color || options.grid.color;
for(i = 0; i < axis.ticks.length && axis.options.showLabels && axis.used; ++i){
tick = axis.ticks[i];
if (!tick.label || tick.label.length == 0) continue;
style.angle = Flotr.toRad(axis.options.labelsAngle);
style.halign = 'r';
style.valign = 'm';
ctx.drawText(
tick.label,
this.plotOffset.left - options.grid.labelMargin,
this.plotOffset.top + this.tVert(tick.v, axis),
style
);
}
// Add y2 labels.
axis = a.y2;
style.color = axis.options.color || options.grid.color;
for(i = 0; i < axis.ticks.length && axis.options.showLabels && axis.used; ++i){
tick = axis.ticks[i];
if (!tick.label || tick.label.length == 0) continue;
style.angle = Flotr.toRad(axis.options.labelsAngle);
style.halign = 'l';
style.valign = 'm';
ctx.drawText(
tick.label,
this.plotOffset.left + this.plotWidth + options.grid.labelMargin,
this.plotOffset.top + this.tVert(tick.v, axis),
style
);
ctx.save();
ctx.strokeStyle = style.color;
ctx.beginPath();
ctx.moveTo(this.plotOffset.left + this.plotWidth - 8, this.plotOffset.top + this.tVert(tick.v, axis));
ctx.lineTo(this.plotOffset.left + this.plotWidth, this.plotOffset.top + this.tVert(tick.v, axis));
ctx.stroke();
ctx.restore();
}
}
else if (a.x.options.showLabels ||
a.x2.options.showLabels ||
a.y.options.showLabels ||
a.y2.options.showLabels) {
html = ['<div style="font-size:smaller;color:' + options.grid.color + ';" class="flotr-labels">'];
// Add x labels.
axis = a.x;
if (axis.options.showLabels){
for(i = 0; i < axis.ticks.length; ++i){
tick = axis.ticks[i];
if(!tick.label || tick.label.length == 0 ||
(this.plotOffset.left + this.tHoz(tick.v, axis) < 0) ||
(this.plotOffset.left + this.tHoz(tick.v, axis) > this.canvasWidth)) continue;
html.push('<div style="position:absolute;top:' + (this.plotOffset.top + this.plotHeight + options.grid.labelMargin) + 'px;left:' + (this.plotOffset.left + this.tHoz(tick.v, axis) - xBoxWidth/2) + 'px;width:' + xBoxWidth + 'px;text-align:center;'+(axis.options.color?('color:'+axis.options.color+';'):'')+'" class="flotr-grid-label">' + tick.label + '</div>');
}
}
// Add x2 labels.
axis = a.x2;
if (axis.options.showLabels && axis.used){
for(i = 0; i < axis.ticks.length; ++i){
tick = axis.ticks[i];
if(!tick.label || tick.label.length == 0 ||
(this.plotOffset.left + this.tHoz(tick.v, axis) < 0) ||
(this.plotOffset.left + this.tHoz(tick.v, axis) > this.canvasWidth)) continue;
html.push('<div style="position:absolute;top:' + (this.plotOffset.top - options.grid.labelMargin - axis.maxLabel.height) + 'px;left:' + (this.plotOffset.left + this.tHoz(tick.v, axis) - xBoxWidth/2) + 'px;width:' + xBoxWidth + 'px;text-align:center;'+(axis.options.color?('color:'+axis.options.color+';'):'')+'" class="flotr-grid-label">' + tick.label + '</div>');
}
}
// Add y labels.
axis = a.y;
if (axis.options.showLabels){
for(i = 0; i < axis.ticks.length; ++i){
tick = axis.ticks[i];
if (!tick.label || tick.label.length == 0 ||
(this.plotOffset.top + this.tVert(tick.v, axis) < 0) ||
(this.plotOffset.top + this.tVert(tick.v, axis) > this.canvasHeight)) continue;
html.push('<div style="position:absolute;top:' + (this.plotOffset.top + this.tVert(tick.v, axis) - axis.maxLabel.height/2) + 'px;left:0;width:' + (this.plotOffset.left - options.grid.labelMargin) + 'px;text-align:right;'+(axis.options.color?('color:'+axis.options.color+';'):'')+'" class="flotr-grid-label">' + tick.label + '</div>');
}
}
// Add y2 labels.
axis = a.y2;
if (axis.options.showLabels && axis.used){
ctx.save();
ctx.strokeStyle = axis.options.color || options.grid.color;
ctx.beginPath();
for(i = 0; i < axis.ticks.length; ++i){
tick = axis.ticks[i];
if (!tick.label || tick.label.length == 0 ||
(this.plotOffset.top + this.tVert(tick.v, axis) < 0) ||
(this.plotOffset.top + this.tVert(tick.v, axis) > this.canvasHeight)) continue;
html.push('<div style="position:absolute;top:' + (this.plotOffset.top + this.tVert(tick.v, axis) - axis.maxLabel.height/2) + 'px;right:0;width:' + (this.plotOffset.right - options.grid.labelMargin) + 'px;text-align:left;'+(axis.options.color?('color:'+axis.options.color+';'):'')+'" class="flotr-grid-label">' + tick.label + '</div>');
ctx.moveTo(this.plotOffset.left + this.plotWidth - 8, this.plotOffset.top + this.tVert(tick.v, axis));
ctx.lineTo(this.plotOffset.left + this.plotWidth, this.plotOffset.top + this.tVert(tick.v, axis));
}
ctx.stroke();
ctx.restore();
}
html.push('</div>');
this.el.insert(html.join(''));
}
},
/**
* Draws the title and the subtitle
*/
drawTitles: function(){
var html,
options = this.options,
margin = options.grid.labelMargin,
ctx = this.ctx,
a = this.axes;
if (!options.HtmlText && this.textEnabled) {
var style = {
size: options.fontSize,
color: options.grid.color,
halign: 'c'
};
// Add subtitle
if (options.subtitle){
ctx.drawText(
options.subtitle,
this.plotOffset.left + this.plotWidth/2,
this.titleHeight + this.subtitleHeight - 2,
style
);
}
style.weight = 1.5;
style.size *= 1.5;
// Add title
if (options.title){
ctx.drawText(
options.title,
this.plotOffset.left + this.plotWidth/2,
this.titleHeight - 2,
style
);
}
style.weight = 1.8;
style.size *= 0.8;
style.adjustAlign = true;
// Add x axis title
if (a.x.options.title && a.x.used){
style.halign = 'c';
style.valign = 't';
style.angle = Flotr.toRad(a.x.options.titleAngle);
ctx.drawText(
a.x.options.title,
this.plotOffset.left + this.plotWidth/2,
this.plotOffset.top + a.x.maxLabel.height + this.plotHeight + 2 * margin,
style
);
}
// Add x2 axis title
if (a.x2.options.title && a.x2.used){
style.halign = 'c';
style.valign = 'b';
style.angle = Flotr.toRad(a.x2.options.titleAngle);
ctx.drawText(
a.x2.options.title,
this.plotOffset.left + this.plotWidth/2,
this.plotOffset.top - a.x2.maxLabel.height - 2 * margin,
style
);
}
// Add y axis title
if (a.y.options.title && a.y.used){
style.halign = 'r';
style.valign = 'm';
style.angle = Flotr.toRad(a.y.options.titleAngle);
ctx.drawText(
a.y.options.title,
this.plotOffset.left - a.y.maxLabel.width - 2 * margin,
this.plotOffset.top + this.plotHeight / 2,
style
);
}
// Add y2 axis title
if (a.y2.options.title && a.y2.used){
style.halign = 'l';
style.valign = 'm';
style.angle = Flotr.toRad(a.y2.options.titleAngle);
ctx.drawText(
a.y2.options.title,
this.plotOffset.left + this.plotWidth + a.y2.maxLabel.width + 2 * margin,
this.plotOffset.top + this.plotHeight / 2,
style
);
}
}
else {
html = ['<div style="color:'+options.grid.color+';" class="flotr-titles">'];
// Add title
if (options.title)
html.push('<div style="position:absolute;top:0;left:'+this.plotOffset.left+'px;font-size:1em;font-weight:bold;text-align:center;width:'+this.plotWidth+'px;" class="flotr-title">'+options.title+'</div>');
// Add subtitle
if (options.subtitle)
html.push('<div style="position:absolute;top:'+this.titleHeight+'px;left:'+this.plotOffset.left+'px;font-size:smaller;text-align:center;width:'+this.plotWidth+'px;" class="flotr-subtitle">'+options.subtitle+'</div>');
html.push('</div>');
html.push('<div class="flotr-axis-title" style="font-weight:bold;">');
// Add x axis title
if (a.x.options.title && a.x.used)
html.push('<div style="position:absolute;top:' + (this.plotOffset.top + this.plotHeight + options.grid.labelMargin + a.x.titleSize.height) + 'px;left:' + this.plotOffset.left + 'px;width:' + this.plotWidth + 'px;text-align:center;" class="flotr-axis-title">' + a.x.options.title + '</div>');
// Add x2 axis title
if (a.x2.options.title && a.x2.used)
html.push('<div style="position:absolute;top:0;left:' + this.plotOffset.left + 'px;width:' + this.plotWidth + 'px;text-align:center;" class="flotr-axis-title">' + a.x2.options.title + '</div>');
// Add y axis title
if (a.y.options.title && a.y.used)
html.push('<div style="position:absolute;top:' + (this.plotOffset.top + this.plotHeight/2 - a.y.titleSize.height/2) + 'px;left:0;text-align:right;" class="flotr-axis-title">' + a.y.options.title + '</div>');
// Add y2 axis title
if (a.y2.options.title && a.y2.used)
html.push('<div style="position:absolute;top:' + (this.plotOffset.top + this.plotHeight/2 - a.y.titleSize.height/2) + 'px;right:0;text-align:right;" class="flotr-axis-title">' + a.y2.options.title + '</div>');
html.push('</div>');
this.el.insert(html.join(''));
}
},
/**
* Actually draws the graph.
* @param {Object} series - series to draw
*/
drawSeries: function(series){
series = series || this.series;
var drawn = false;
for(var type in Flotr._registeredTypes){
if(series[type] && series[type].show){
this[Flotr._registeredTypes[type]](series);
drawn = true;
}
}
if(!drawn){
this[Flotr._registeredTypes[this.options.defaultType]](series);
}
},
plotLine: function(series, offset){
var ctx = this.ctx,
xa = series.xaxis,
ya = series.yaxis,
tHoz = this.tHoz.bind(this),
tVert = this.tVert.bind(this),
data = series.data;
if(data.length < 2) return;
var prevx = tHoz(data[0][0], xa),
prevy = tVert(data[0][1], ya) + offset;
ctx.beginPath();
ctx.moveTo(prevx, prevy);
for(var i = 0; i < data.length - 1; ++i){
var x1 = data[i][0], y1 = data[i][1],
x2 = data[i+1][0], y2 = data[i+1][1];
// To allow empty values
if (y1 === null || y2 === null) continue;
/**
* Clip with ymin.
*/
if(y1 <= y2 && y1 < ya.min){
/**
* Line segment is outside the drawing area.
*/
if(y2 < ya.min) continue;
/**
* Compute new intersection point.
*/
x1 = (ya.min - y1) / (y2 - y1) * (x2 - x1) + x1;
y1 = ya.min;
}
else if(y2 <= y1 && y2 < ya.min){
if(y1 < ya.min) continue;
x2 = (ya.min - y1) / (y2 - y1) * (x2 - x1) + x1;
y2 = ya.min;
}
/**
* Clip with ymax.
*/
if(y1 >= y2 && y1 > ya.max) {
if(y2 > ya.max) continue;
x1 = (ya.max - y1) / (y2 - y1) * (x2 - x1) + x1;
y1 = ya.max;
}
else if(y2 >= y1 && y2 > ya.max){
if(y1 > ya.max) continue;
x2 = (ya.max - y1) / (y2 - y1) * (x2 - x1) + x1;
y2 = ya.max;
}
/**
* Clip with xmin.
*/
if(x1 <= x2 && x1 < xa.min){
if(x2 < xa.min) continue;
y1 = (xa.min - x1) / (x2 - x1) * (y2 - y1) + y1;
x1 = xa.min;
}
else if(x2 <= x1 && x2 < xa.min){
if(x1 < xa.min) continue;
y2 = (xa.min - x1) / (x2 - x1) * (y2 - y1) + y1;
x2 = xa.min;
}
/**
* Clip with xmax.
*/
if(x1 >= x2 && x1 > xa.max){
if (x2 > xa.max) continue;
y1 = (xa.max - x1) / (x2 - x1) * (y2 - y1) + y1;
x1 = xa.max;
}
else if(x2 >= x1 && x2 > xa.max){
if(x1 > xa.max) continue;
y2 = (xa.max - x1) / (x2 - x1) * (y2 - y1) + y1;
x2 = xa.max;
}
if(prevx != tHoz(x1, xa) || prevy != tVert(y1, ya) + offset)
ctx.moveTo(tHoz(x1, xa), tVert(y1, ya) + offset);
prevx = tHoz(x2, xa);
prevy = tVert(y2, ya) + offset;
ctx.lineTo(prevx, prevy);
}
ctx.stroke();
},
/**
* Function used to fill
* @param {Object} series - The series to draw
* @param {Object} offset
*/
plotLineArea: function(series, offset){
var data = series.data;
if(data.length < 2) return;
var top, lastX = 0,
ctx = this.ctx,
xa = series.xaxis,
ya = series.yaxis,
tHoz = this.tHoz.bind(this),
tVert = this.tVert.bind(this),
bottom = Math.min(Math.max(0, ya.min), ya.max),
first = true;
ctx.beginPath();
for(var i = 0; i < data.length - 1; ++i){
var x1 = data[i][0], y1 = data[i][1],
x2 = data[i+1][0], y2 = data[i+1][1];
if(x1 <= x2 && x1 < xa.min){
if(x2 < xa.min) continue;
y1 = (xa.min - x1) / (x2 - x1) * (y2 - y1) + y1;
x1 = xa.min;
}
else if(x2 <= x1 && x2 < xa.min){
if(x1 < xa.min) continue;
y2 = (xa.min - x1) / (x2 - x1) * (y2 - y1) + y1;
x2 = xa.min;
}
if(x1 >= x2 && x1 > xa.max){
if(x2 > xa.max) continue;
y1 = (xa.max - x1) / (x2 - x1) * (y2 - y1) + y1;
x1 = xa.max;
}
else if(x2 >= x1 && x2 > xa.max){
if (x1 > xa.max) continue;
y2 = (xa.max - x1) / (x2 - x1) * (y2 - y1) + y1;
x2 = xa.max;
}
if(first){
ctx.moveTo(tHoz(x1, xa), tVert(bottom, ya) + offset);
first = false;
}
/**
* Now check the case where both is outside.
*/
if(y1 >= ya.max && y2 >= ya.max){
ctx.lineTo(tHoz(x1, xa), tVert(ya.max, ya) + offset);
ctx.lineTo(tHoz(x2, xa), tVert(ya.max, ya) + offset);
continue;
}
else if(y1 <= ya.min && y2 <= ya.min){
ctx.lineTo(tHoz(x1, xa), tVert(ya.min, ya) + offset);
ctx.lineTo(tHoz(x2, xa), tVert(ya.min, ya) + offset);
continue;
}
/**
* Else it's a bit more complicated, there might
* be two rectangles and two triangles we need to fill
* in; to find these keep track of the current x values.
*/
var x1old = x1, x2old = x2;
/**
* And clip the y values, without shortcutting.
* Clip with ymin.
*/
if(y1 <= y2 && y1 < ya.min && y2 >= ya.min){
x1 = (ya.min - y1) / (y2 - y1) * (x2 - x1) + x1;
y1 = ya.min;
}
else if(y2 <= y1 && y2 < ya.min && y1 >= ya.min){
x2 = (ya.min - y1) / (y2 - y1) * (x2 - x1) + x1;
y2 = ya.min;
}
/**
* Clip with ymax.
*/
if(y1 >= y2 && y1 > ya.max && y2 <= ya.max){
x1 = (ya.max - y1) / (y2 - y1) * (x2 - x1) + x1;
y1 = ya.max;
}
else if(y2 >= y1 && y2 > ya.max && y1 <= ya.max){
x2 = (ya.max - y1) / (y2 - y1) * (x2 - x1) + x1;
y2 = ya.max;
}
/**
* If the x value was changed we got a rectangle to fill.
*/
if(x1 != x1old){
top = (y1 <= ya.min) ? top = ya.min : ya.max;
ctx.lineTo(tHoz(x1old, xa), tVert(top, ya) + offset);
ctx.lineTo(tHoz(x1, xa), tVert(top, ya) + offset);
}
/**
* Fill the triangles.
*/
ctx.lineTo(tHoz(x1, xa), tVert(y1, ya) + offset);
ctx.lineTo(tHoz(x2, xa), tVert(y2, ya) + offset);
/**
* Fill the other rectangle if it's there.
*/
if(x2 != x2old){
top = (y2 <= ya.min) ? ya.min : ya.max;
ctx.lineTo(tHoz(x2old, xa), tVert(top, ya) + offset);
ctx.lineTo(tHoz(x2, xa), tVert(top, ya) + offset);
}
lastX = Math.max(x2, x2old);
}
ctx.lineTo(tHoz(lastX, xa), tVert(bottom, ya) + offset);
ctx.closePath();
ctx.fill();
},
/**
* Draws lines series in the canvas element.
* @param {Object} series - Series with options.lines.show = true.
*/
drawSeriesLines: function(series){
series = series || this.series;
var ctx = this.ctx;
ctx.save();
ctx.translate(this.plotOffset.left, this.plotOffset.top);
ctx.lineJoin = 'round';
var lw = series.lines.lineWidth;
var sw = series.shadowSize;
if(sw > 0){
ctx.lineWidth = sw / 2;
var offset = lw/2 + ctx.lineWidth/2;
ctx.strokeStyle = "rgba(0,0,0,0.1)";
this.plotLine(series, offset + sw/2);
ctx.strokeStyle = "rgba(0,0,0,0.2)";
this.plotLine(series, offset);
if(series.lines.fill) {
ctx.fillStyle = "rgba(0,0,0,0.05)";
this.plotLineArea(series, offset + sw/2);
}
}
ctx.lineWidth = lw;
ctx.strokeStyle = series.color;
if(series.lines.fill){
ctx.fillStyle = series.lines.fillColor != null ? series.lines.fillColor : Flotr.parseColor(series.color).scale(null, null, null, series.lines.fillOpacity).toString();
this.plotLineArea(series, 0);
}
this.plotLine(series, 0);
ctx.restore();
},
/**
* Draws point series in the canvas element.
* @param {Object} series - Series with options.points.show = true.
*/
drawSeriesPoints: function(series) {
var ctx = this.ctx;
ctx.save();
ctx.translate(this.plotOffset.left, this.plotOffset.top);
var lw = series.lines.lineWidth;
var sw = series.shadowSize;
if(sw > 0){
ctx.lineWidth = sw / 2;
ctx.strokeStyle = 'rgba(0,0,0,0.1)';
this.plotPointShadows(series, sw/2 + ctx.lineWidth/2, series.points.radius);
ctx.strokeStyle = 'rgba(0,0,0,0.2)';
this.plotPointShadows(series, ctx.lineWidth/2, series.points.radius);
}
ctx.lineWidth = series.points.lineWidth;
ctx.strokeStyle = series.color;
ctx.fillStyle = series.points.fillColor != null ? series.points.fillColor : series.color;
this.plotPoints(series, series.points.radius, series.points.fill);
ctx.restore();
},
plotPoints: function (series, radius, fill) {
var xa = series.xaxis,
ya = series.yaxis,
ctx = this.ctx, i,
data = series.data;
for(i = data.length - 1; i > -1; --i){
var x = data[i][0], y = data[i][1];
// To allow empty values
if(y === null || x < xa.min || x > xa.max || y < ya.min || y > ya.max)
continue;
ctx.beginPath();
ctx.arc(this.tHoz(x, xa), this.tVert(y, ya), radius, 0, 2 * Math.PI, true);
if(fill) ctx.fill();
ctx.stroke();
}
},
plotPointShadows: function(series, offset, radius){
var xa = series.xaxis,
ya = series.yaxis,
ctx = this.ctx, i,
data = series.data;
for(i = data.length - 1; i > -1; --i){
var x = data[i][0], y = data[i][1];
if (y === null || x < xa.min || x > xa.max || y < ya.min || y > ya.max)
continue;
ctx.beginPath();
ctx.arc(this.tHoz(x, xa), this.tVert(y, ya) + offset, radius, 0, Math.PI, false);
ctx.stroke();
}
},
/**
* Draws bar series in the canvas element.
* @param {Object} series - Series with options.bars.show = true.
*/
drawSeriesBars: function(series) {
var ctx = this.ctx,
bw = series.bars.barWidth,
lw = Math.min(series.bars.lineWidth, bw);
ctx.save();
ctx.translate(this.plotOffset.left, this.plotOffset.top);
ctx.lineJoin = 'miter';
/**
* @todo linewidth not interpreted the right way.
*/
ctx.lineWidth = lw;
ctx.strokeStyle = series.color;
this.plotBarsShadows(series, bw, 0, series.bars.fill);
if(series.bars.fill){
var color = series.bars.fillColor || series.color;
ctx.fillStyle = Flotr.parseColor(color).scale(null, null, null, series.bars.fillOpacity).toString();
}
this.plotBars(series, bw, 0, series.bars.fill);
ctx.restore();
},
plotBars: function(series, barWidth, offset, fill){
var data = series.data;
if(data.length < 1) return;
var xa = series.xaxis,
ya = series.yaxis,
ctx = this.ctx,
tHoz = this.tHoz.bind(this),
tVert = this.tVert.bind(this);
for(var i = 0; i < data.length; i++){
var x = data[i][0],
y = data[i][1],
drawLeft = true, drawTop = true, drawRight = true;
if (y === null) continue;
// Stacked bars
var stackOffset = 0;
if(series.bars.stacked) {
$H(xa.values).each(function(pair) {
if (pair.key == x) {
stackOffset = pair.value.stack || 0;
pair.value.stack = stackOffset + y;
}
});
}
// @todo: fix horizontal bars support
// Horizontal bars
if(series.bars.horizontal)
var left = stackOffset, right = x + stackOffset, bottom = y, top = y + barWidth;
else
var left = x - (series.bars.centered ? barWidth/2 : 0), right = x + barWidth - (series.bars.centered ? barWidth/2 : 0), bottom = stackOffset, top = y + stackOffset;
if(right < xa.min || left > xa.max || top < ya.min || bottom > ya.max)
continue;
if(left < xa.min){
left = xa.min;
drawLeft = false;
}
if(right > xa.max){
right = xa.max;
if (xa.lastSerie != series && series.bars.horizontal)
drawTop = false;
}
if(bottom < ya.min)
bottom = ya.min;
if(top > ya.max){
top = ya.max;
if (ya.lastSerie != series && !series.bars.horizontal)
drawTop = false;
}
/**
* Fill the bar.
*/
if(fill){
ctx.beginPath();
ctx.moveTo(tHoz(left, xa), tVert(bottom, ya) + offset);
ctx.lineTo(tHoz(left, xa), tVert(top, ya) + offset);
ctx.lineTo(tHoz(right, xa), tVert(top, ya) + offset);
ctx.lineTo(tHoz(right, xa), tVert(bottom, ya) + offset);
ctx.fill();
}
/**
* Draw bar outline/border.
*/
if(series.bars.lineWidth != 0 && (drawLeft || drawRight || drawTop)){
ctx.beginPath();
ctx.moveTo(tHoz(left, xa), tVert(bottom, ya) + offset);
ctx[drawLeft ?'lineTo':'moveTo'](tHoz(left, xa), tVert(top, ya) + offset);
ctx[drawTop ?'lineTo':'moveTo'](tHoz(right, xa), tVert(top, ya) + offset);
ctx[drawRight?'lineTo':'moveTo'](tHoz(right, xa), tVert(bottom, ya) + offset);
ctx.stroke();
}
}
},
plotBarsShadows: function(series, barWidth, offset){
var data = series.data;
if(data.length < 1) return;
var xa = series.xaxis,
ya = series.yaxis,
ctx = this.ctx,
tHoz = this.tHoz.bind(this),
tVert = this.tVert.bind(this),
sw = this.options.shadowSize;
for(var i = 0; i < data.length; i++){
var x = data[i][0],
y = data[i][1];
if (y === null) continue;
// Stacked bars
var stackOffset = 0;
if(series.bars.stacked) {
$H(xa.values).each(function(pair) {
if (pair.key == x) {
stackOffset = pair.value.stackShadow || 0;
pair.value.stackShadow = stackOffset + y;
}
});
}
// Horizontal bars
if(series.bars.horizontal)
var left = stackOffset, right = x + stackOffset, bottom = y, top = y + barWidth;
else
var left = x - (series.bars.centered ? barWidth/2 : 0), right = x + barWidth - (series.bars.centered ? barWidth/2 : 0), bottom = stackOffset, top = y + stackOffset;
if(right < xa.min || left > xa.max || top < ya.min || bottom > ya.max)
continue;
if(left < xa.min) left = xa.min;
if(right > xa.max) right = xa.max;
if(bottom < ya.min) bottom = ya.min;
if(top > ya.max) top = ya.max;
var width = tHoz(right, xa)-tHoz(left, xa)-((tHoz(right, xa)+sw <= this.plotWidth) ? 0 : sw);
var height = Math.max(0, tVert(bottom, ya)-tVert(top, ya)-((tVert(bottom, ya)+sw <= this.plotHeight) ? 0 : sw));
ctx.fillStyle = 'rgba(0,0,0,0.05)';
ctx.fillRect(Math.min(tHoz(left, xa)+sw, this.plotWidth), Math.min(tVert(top, ya)+sw, this.plotWidth), width, height);
}
},
/**
* Draws candles series in the canvas element.
* @param {Object} series - Series with options.candles.show = true.
*/
drawSeriesCandles: function(series) {
var ctx = this.ctx,
bw = series.candles.candleWidth;
ctx.save();
ctx.translate(this.plotOffset.left, this.plotOffset.top);
ctx.lineJoin = 'miter';
/**
* @todo linewidth not interpreted the right way.
*/
ctx.lineWidth = series.candles.lineWidth;
this.plotCandlesShadows(series, bw/2);
this.plotCandles(series, bw/2);
ctx.restore();
},
plotCandles: function(series, offset){
var data = series.data;
if(data.length < 1) return;
var xa = series.xaxis,
ya = series.yaxis,
ctx = this.ctx,
tHoz = this.tHoz.bind(this),
tVert = this.tVert.bind(this);
for(var i = 0; i < data.length; i++){
var d = data[i],
x = d[0],
open = d[1],
high = d[2],
low = d[3],
close = d[4];
var left = x - series.candles.candleWidth/2,
right = x + series.candles.candleWidth/2,
bottom = Math.max(ya.min, low),
top = Math.min(ya.max, high),
bottom2 = Math.max(ya.min, Math.min(open, close)),
top2 = Math.min(ya.max, Math.max(open, close));
if(right < xa.min || left > xa.max || top < ya.min || bottom > ya.max)
continue;
var color = series.candles[open>close?'downFillColor':'upFillColor'];
/**
* Fill the candle.
*/
if(series.candles.fill && !series.candles.barcharts){
ctx.fillStyle = Flotr.parseColor(color).scale(null, null, null, series.candles.fillOpacity).toString();
ctx.fillRect(tHoz(left, xa), tVert(top2, ya) + offset, tHoz(right, xa) - tHoz(left, xa), tVert(bottom2, ya) - tVert(top2, ya));
}
/**
* Draw candle outline/border, high, low.
*/
if(series.candles.lineWidth || series.candles.wickLineWidth){
var x, y, pixelOffset = (series.candles.wickLineWidth % 2) / 2;
x = Math.floor(tHoz((left + right) / 2), xa) + pixelOffset;
ctx.save();
ctx.strokeStyle = color;
ctx.lineWidth = series.candles.wickLineWidth;
ctx.lineCap = 'butt';
if (series.candles.barcharts) {
ctx.beginPath();
ctx.moveTo(x, Math.floor(tVert(top, ya) + offset));
ctx.lineTo(x, Math.floor(tVert(bottom, ya) + offset));
y = Math.floor(tVert(open, ya) + offset)+0.5;
ctx.moveTo(Math.floor(tHoz(left, xa))+pixelOffset, y);
ctx.lineTo(x, y);
y = Math.floor(tVert(close, ya) + offset)+0.5;
ctx.moveTo(Math.floor(tHoz(right, xa))+pixelOffset, y);
ctx.lineTo(x, y);
}
else {
ctx.strokeRect(tHoz(left, xa), tVert(top2, ya) + offset, tHoz(right, xa) - tHoz(left, xa), tVert(bottom2, ya) - tVert(top2, ya));
ctx.beginPath();
ctx.moveTo(x, Math.floor(tVert(top2, ya) + offset));
ctx.lineTo(x, Math.floor(tVert(top, ya) + offset));
ctx.moveTo(x, Math.floor(tVert(bottom2, ya) + offset));
ctx.lineTo(x, Math.floor(tVert(bottom, ya) + offset));
}
ctx.stroke();
ctx.restore();
}
}
},
plotCandlesShadows: function(series, offset){
var data = series.data;
if(data.length < 1 || series.candles.barcharts) return;
var xa = series.xaxis,
ya = series.yaxis,
tHoz = this.tHoz.bind(this),
tVert = this.tVert.bind(this),
sw = this.options.shadowSize;
for(var i = 0; i < data.length; i++){
var d = data[i],
x = d[0],
open = d[1],
high = d[2],
low = d[3],
close = d[4];
var left = x - series.candles.candleWidth/2,
right = x + series.candles.candleWidth/2,
bottom = Math.max(ya.min, Math.min(open, close)),
top = Math.min(ya.max, Math.max(open, close));
if(right < xa.min || left > xa.max || top < ya.min || bottom > ya.max)
continue;
var width = tHoz(right, xa)-tHoz(left, xa)-((tHoz(right, xa)+sw <= this.plotWidth) ? 0 : sw);
var height = Math.max(0, tVert(bottom, ya)-tVert(top, ya)-((tVert(bottom, ya)+sw <= this.plotHeight) ? 0 : sw));
this.ctx.fillStyle = 'rgba(0,0,0,0.05)';
this.ctx.fillRect(Math.min(tHoz(left, xa)+sw, this.plotWidth), Math.min(tVert(top, ya)+sw, this.plotWidth), width, height);
}
},
/**
* Draws a pie in the canvas element.
* @param {Object} series - Series with options.pie.show = true.
*/
drawSeriesPie: function(series) {
if (this.options.pie.drawn) return;
var ctx = this.ctx,
options = this.options,
lw = series.pie.lineWidth,
sw = series.shadowSize,
data = series.data,
plotOffset = this.plotOffset,
radius = (Math.min(this.canvasWidth, this.canvasHeight) * series.pie.sizeRatio) / 2,
html = [],
vScale = 1,//Math.cos(series.pie.viewAngle);
plotTickness = Math.sin(series.pie.viewAngle)*series.pie.spliceThickness / vScale,
style = {
size: options.fontSize*1.2,
color: options.grid.color,
weight: 1.5
},
center = {
x: plotOffset.left + (this.plotWidth)/2,
y: plotOffset.top + (this.plotHeight)/2
},
// Pie portions
portions = this.series.collect(function(hash, index){
if (hash.pie.show && hash.data[0][1] !== null)
return {
name: (hash.label || hash.data[0][1]),
value: [index, hash.data[0][1]],
options: hash.pie,
series: hash
};
}),
// Sum of the portions' angles
sum = portions.pluck('value').pluck(1).inject(0, function(acc, n) { return acc + n; }),
fraction = 0.0,
angle = series.pie.startAngle,
value = 0.0;
var slices = portions.collect(function(slice){
angle += fraction;
value = parseFloat(slice.value[1]); // @warning : won't support null values !!
fraction = value/sum;
return {
name: slice.name,
fraction: fraction,
x: slice.value[0],
y: value,
options: slice.options,
series: slice.series,
startAngle: 2 * angle * Math.PI,
endAngle: 2 * (angle + fraction) * Math.PI
};
});
ctx.save();
if(sw > 0){
slices.each(function (slice) {
if (slice.startAngle == slice.endAngle) return;
var bisection = (slice.startAngle + slice.endAngle) / 2,
xOffset = center.x + Math.cos(bisection) * slice.options.explode + sw,
yOffset = center.y + Math.sin(bisection) * slice.options.explode + sw;
this.plotSlice(xOffset, yOffset, radius, slice.startAngle, slice.endAngle, false, vScale);
if (series.pie.fill) {
ctx.fillStyle = 'rgba(0,0,0,0.1)';
ctx.fill();
}
}, this);
}
if (options.HtmlText || !this.textEnabled)
html = ['<div style="color:' + this.options.grid.color + '" class="flotr-labels">'];
slices.each(function (slice, index) {
if (slice.startAngle == slice.endAngle) return;
var bisection = (slice.startAngle + slice.endAngle) / 2,
color = slice.series.color,
fillColor = slice.options.fillColor || color,
xOffset = center.x + Math.cos(bisection) * slice.options.explode,
yOffset = center.y + Math.sin(bisection) * slice.options.explode;
this.plotSlice(xOffset, yOffset, radius, slice.startAngle, slice.endAngle, false, vScale);
if(series.pie.fill){
ctx.fillStyle = Flotr.parseColor(fillColor).scale(null, null, null, series.pie.fillOpacity).toString();
ctx.fill();
}
ctx.lineWidth = lw;
ctx.strokeStyle = color;
ctx.stroke();
var label = options.pie.labelFormatter(slice),
textAlignRight = (Math.cos(bisection) < 0),
distX = xOffset + Math.cos(bisection) * (series.pie.explode + radius),
distY = yOffset + Math.sin(bisection) * (series.pie.explode + radius);
if (slice.fraction && label) {
if (options.HtmlText || !this.textEnabled) {
var divStyle = 'position:absolute;top:' + (distY - 5) + 'px;'; //@todo: change
if (textAlignRight)
divStyle += 'right:'+(this.canvasWidth - distX)+'px;text-align:right;';
else
divStyle += 'left:'+distX+'px;text-align:left;';
html.push('<div style="' + divStyle + '" class="flotr-grid-label">' + label + '</div>');
}
else {
style.halign = textAlignRight ? 'r' : 'l';
ctx.drawText(
label,
distX,
distY + style.size / 2,
style
);
}
}
}, this);
if (options.HtmlText || !this.textEnabled) {
html.push('</div>');
this.el.insert(html.join(''));
}
ctx.restore();
options.pie.drawn = true;
},
plotSlice: function(x, y, radius, startAngle, endAngle, fill, vScale) {
var ctx = this.ctx;
vScale = vScale || 1;
ctx.scale(1, vScale);
ctx.beginPath();
ctx.moveTo(x, y);
ctx.arc (x, y, radius, startAngle, endAngle, fill);
ctx.lineTo(x, y);
ctx.closePath();
},
/**
* Adds a legend div to the canvas container or draws it on the canvas.
*/
insertLegend: function(){
if(!this.options.legend.show)
return;
var series = this.series,
plotOffset = this.plotOffset,
options = this.options,
fragments = [],
rowStarted = false,
ctx = this.ctx,
i;
var noLegendItems = series.findAll(function(s) {return (s.label && !s.hide)}).size();
if (noLegendItems) {
if (!options.HtmlText && this.textEnabled) {
var style = {
size: options.fontSize*1.1,
color: options.grid.color
};
// @todo: take css into account
//var dummyDiv = this.el.insert('<div class="flotr-legend" style="position:absolute;top:-10000px;"></div>');
var p = options.legend.position,
m = options.legend.margin,
lbw = options.legend.labelBoxWidth,
lbh = options.legend.labelBoxHeight,
lbm = options.legend.labelBoxMargin,
offsetX = plotOffset.left + m,
offsetY = plotOffset.top + m;
// We calculate the labels' max width
var labelMaxWidth = 0;
for(i = series.length - 1; i > -1; --i){
if(!series[i].label || series[i].hide) continue;
var label = options.legend.labelFormatter(series[i].label);
labelMaxWidth = Math.max(labelMaxWidth, ctx.measureText(label, style));
}
var legendWidth = Math.round(lbw + lbm*3 + labelMaxWidth),
legendHeight = Math.round(noLegendItems*(lbm+lbh) + lbm);
if(p.charAt(0) == 's') offsetY = plotOffset.top + this.plotHeight - (m + legendHeight);
if(p.charAt(1) == 'e') offsetX = plotOffset.left + this.plotWidth - (m + legendWidth);
// Legend box
var color = Flotr.parseColor(options.legend.backgroundColor || 'rgb(240,240,240)').scale(null, null, null, options.legend.backgroundOpacity || 0.1).toString();
ctx.fillStyle = color;
ctx.fillRect(offsetX, offsetY, legendWidth, legendHeight);
ctx.strokeStyle = options.legend.labelBoxBorderColor;
ctx.strokeRect(Flotr.toPixel(offsetX), Flotr.toPixel(offsetY), legendWidth, legendHeight);
// Legend labels
var x = offsetX + lbm;
var y = offsetY + lbm;
for(i = 0; i < series.length; i++){
if(!series[i].label || series[i].hide) continue;
var label = options.legend.labelFormatter(series[i].label);
ctx.fillStyle = series[i].color;
ctx.fillRect(x, y, lbw-1, lbh-1);
ctx.strokeStyle = options.legend.labelBoxBorderColor;
ctx.lineWidth = 1;
ctx.strokeRect(Math.ceil(x)-1.5, Math.ceil(y)-1.5, lbw+2, lbh+2);
// Legend text
ctx.drawText(
label,
x + lbw + lbm,
y + (lbh + style.size - ctx.fontDescent(style))/2,
style
);
y += lbh + lbm;
}
}
else {
for(i = 0; i < series.length; ++i){
if(!series[i].label || series[i].hide) continue;
if(i % options.legend.noColumns == 0){
fragments.push(rowStarted ? '</tr><tr>' : '<tr>');
rowStarted = true;
}
var legend = options.legend,
s = series[i],
label = legend.labelFormatter(s.label),
boxWidth = legend.labelBoxWidth,
boxHeight = legend.labelBoxHeight,
opacity = 'opacity:' + s.bars.fillOpacity + ';filter:alpha(opacity=' + s.bars.fillOpacity + ');',
color = 'background-color:' + ((s.bars.show && s.bars.fillColor && s.bars.fill) ? s.bars.fillColor : s.color) + ';';
fragments.push(
'<td class="flotr-legend-color-box">',
'<div style="border:1px solid ', legend.labelBoxBorderColor, ';padding:1px">',
'<div style="width:', (boxWidth-1), 'px;height:', (boxHeight-1), 'px;border:1px solid ', series[i].color, '">',
'<div style="width:', boxWidth, 'px;height:', boxHeight, 'px;', opacity, color, '"></div>',
'</div>',
'</div>',
'</td>',
'<td class="flotr-legend-label">', label, '</td>'
);
}
if(rowStarted) fragments.push('</tr>');
if(fragments.length > 0){
var table = '<table style="font-size:smaller;color:' + options.grid.color + '">' + fragments.join("") + '</table>';
if(options.legend.container != null){
$(options.legend.container).update(table);
}
else {
var pos = '', p = options.legend.position, m = options.legend.margin;
if(p.charAt(0) == 'n') pos += 'top:' + (m + plotOffset.top) + 'px;';
else if(p.charAt(0) == 's') pos += 'bottom:' + (m + plotOffset.bottom) + 'px;';
if(p.charAt(1) == 'e') pos += 'right:' + (m + plotOffset.right) + 'px;';
else if(p.charAt(1) == 'w') pos += 'left:' + (m + plotOffset.left) + 'px;';
var div = this.el.insert('<div class="flotr-legend" style="position:absolute;z-index:2;' + pos +'">' + table + '</div>').select('div.flotr-legend').first();
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){
var tmp = (options.grid.backgroundColor != null) ? options.grid.backgroundColor : Flotr.extractColor(div);
c = Flotr.parseColor(tmp).adjust(null, null, null, 1).toString();
}
this.el.insert('<div class="flotr-legend-bg" style="position:absolute;width:' + div.getWidth() + 'px;height:' + div.getHeight() + 'px;' + pos +'background-color:' + c + ';"> </div>').select('div.flotr-legend-bg').first().setStyle({
'opacity': options.legend.backgroundOpacity
});
}
}
}
}
}
},
/**
* Calculates the coordinates from a mouse event object.
* @param {Event} event - Mouse Event object.
* @return {Object} Object with coordinates of the mouse.
*/
getEventPosition: function (event){
var offset = this.overlay.cumulativeOffset(),
rx = (event.pageX - offset.left - this.plotOffset.left),
ry = (event.pageY - offset.top - this.plotOffset.top),
ax = 0, ay = 0;
if(event.pageX == null && event.clientX != null){
var de = document.documentElement, b = document.body;
ax = event.clientX + (de && de.scrollLeft || b.scrollLeft || 0);
ay = event.clientY + (de && de.scrollTop || b.scrollTop || 0);
}else{
ax = event.pageX;
ay = event.pageY;
}
return {
x: this.axes.x.min + rx / this.axes.x.scale,
x2: this.axes.x2.min + rx / this.axes.x2.scale,
y: this.axes.y.max - ry / this.axes.y.scale,
y2: this.axes.y2.max - ry / this.axes.y2.scale,
relX: rx,
relY: ry,
absX: ax,
absY: ay
};
},
/**
* Observes the 'click' event and fires the 'flotr:click' event.
* @param {Event} event - 'click' Event object.
*/
clickHandler: function(event){
if(this.ignoreClick){
this.ignoreClick = false;
return;
}
this.el.fire('flotr:click', [this.getEventPosition(event), this]);
},
/**
* Observes mouse movement over the graph area. Fires the 'flotr:mousemove' event.
* @param {Event} event - 'mousemove' Event object.
*/
mouseMoveHandler: function(event){
var pos = this.getEventPosition(event);
this.lastMousePos.pageX = pos.absX;
this.lastMousePos.pageY = pos.absY;
//@todo Add another overlay for the crosshair
if (this.options.crosshair.mode)
this.clearCrosshair();
if(this.selectionInterval == null && (this.options.mouse.track || this.series.any(function(s){return s.mouse && s.mouse.track;})))
this.hit(pos);
if (this.options.crosshair.mode)
this.drawCrosshair(pos);
this.el.fire('flotr:mousemove', [event, pos, this]);
},
/**
* Observes the 'mousedown' event.
* @param {Event} event - 'mousedown' Event object.
*/
mouseDownHandler: function (event){
if(event.isRightClick()) {
event.stop();
var overlay = this.overlay;
overlay.hide();
function cancelContextMenu () {
overlay.show();
$(document).stopObserving('mousemove', cancelContextMenu);
}
$(document).observe('mousemove', cancelContextMenu);
return;
}
if(!this.options.selection.mode || !event.isLeftClick()) return;
this.setSelectionPos(this.selection.first, event);
if(this.selectionInterval != null){
clearInterval(this.selectionInterval);
}
this.lastMousePos.pageX = null;
this.selectionInterval = setInterval(this.updateSelection.bind(this), 1000/this.options.selection.fps);
this.mouseUpHandler = this.mouseUpHandler.bind(this);
$(document).observe('mouseup', this.mouseUpHandler);
},
/**
* Fires the 'flotr:select' event when the user made a selection.
*/
fireSelectEvent: function(){
var a = this.axes, selection = this.selection,
x1 = (selection.first.x <= selection.second.x) ? selection.first.x : selection.second.x,
x2 = (selection.first.x <= selection.second.x) ? selection.second.x : selection.first.x,
y1 = (selection.first.y >= selection.second.y) ? selection.first.y : selection.second.y,
y2 = (selection.first.y >= selection.second.y) ? selection.second.y : selection.first.y;
x1 = a.x.min + x1 / a.x.scale;
x2 = a.x.min + x2 / a.x.scale;
y1 = a.y.max - y1 / a.y.scale;
y2 = a.y.max - y2 / a.y.scale;
this.el.fire('flotr:select', [{x1:x1, y1:y1, x2:x2, y2:y2}, this]);
},
/**
* Observes the mouseup event for the document.
* @param {Event} event - 'mouseup' Event object.
*/
mouseUpHandler: function(event){
$(document).stopObserving('mouseup', this.mouseUpHandler);
event.stop();
if(this.selectionInterval != null){
clearInterval(this.selectionInterval);
this.selectionInterval = null;
}
this.setSelectionPos(this.selection.second, event);
this.clearSelection();
if(this.selectionIsSane()){
this.drawSelection();
this.fireSelectEvent();
this.ignoreClick = true;
}
},
/**
* Calculates the position of the selection.
* @param {Object} pos - Position object.
* @param {Event} event - Event object.
*/
setSelectionPos: function(pos, event) {
var options = this.options,
offset = $(this.overlay).cumulativeOffset();
if(options.selection.mode.indexOf('x') == -1){
pos.x = (pos == this.selection.first) ? 0 : this.plotWidth;
}else{
pos.x = event.pageX - offset.left - this.plotOffset.left;
pos.x = Math.min(Math.max(0, pos.x), this.plotWidth);
}
if (options.selection.mode.indexOf('y') == -1){
pos.y = (pos == this.selection.first) ? 0 : this.plotHeight;
}else{
pos.y = event.pageY - offset.top - this.plotOffset.top;
pos.y = Math.min(Math.max(0, pos.y), this.plotHeight);
}
},
/**
* Updates (draws) the selection box.
*/
updateSelection: function(){
if(this.lastMousePos.pageX == null) return;
this.setSelectionPos(this.selection.second, this.lastMousePos);
this.clearSelection();
if(this.selectionIsSane()) this.drawSelection();
},
/**
* Removes the selection box from the overlay canvas.
*/
clearSelection: function() {
if(this.prevSelection == null) return;
var prevSelection = this.prevSelection,
lw = this.octx.lineWidth,
plotOffset = this.plotOffset,
x = Math.min(prevSelection.first.x, prevSelection.second.x),
y = Math.min(prevSelection.first.y, prevSelection.second.y),
w = Math.abs(prevSelection.second.x - prevSelection.first.x),
h = Math.abs(prevSelection.second.y - prevSelection.first.y);
this.octx.clearRect(x + plotOffset.left - lw/2+0.5,
y + plotOffset.top - lw/2+0.5,
w + lw,
h + lw);
this.prevSelection = null;
},
/**
* Allows the user the manually select an area.
* @param {Object} area - Object with coordinates to select.
*/
setSelection: function(area){
var options = this.options,
xa = this.axes.x,
ya = this.axes.y,
vertScale = ya.scale,
hozScale = xa.scale,
selX = options.selection.mode.indexOf('x') != -1,
selY = options.selection.mode.indexOf('y') != -1;
this.clearSelection();
this.selection.first.y = selX ? 0 : (ya.max - area.y1) * vertScale;
this.selection.second.y = selX ? this.plotHeight : (ya.max - area.y2) * vertScale;
this.selection.first.x = selY ? 0 : (area.x1 - xa.min) * hozScale;
this.selection.second.x = selY ? this.plotWidth : (area.x2 - xa.min) * hozScale;
this.drawSelection();
this.fireSelectEvent();
},
/**
* Draws the selection box.
*/
drawSelection: function() {
var prevSelection = this.prevSelection,
selection = this.selection,
octx = this.octx,
options = this.options,
plotOffset = this.plotOffset;
if(prevSelection != null &&
selection.first.x == prevSelection.first.x &&
selection.first.y == prevSelection.first.y &&
selection.second.x == prevSelection.second.x &&
selection.second.y == prevSelection.second.y)
return;
octx.save();
octx.strokeStyle = Flotr.parseColor(options.selection.color).scale(null, null, null, 0.8).toString();
octx.lineWidth = 1;
octx.lineJoin = 'miter';
octx.fillStyle = Flotr.parseColor(options.selection.color).scale(null, null, null, 0.4).toString();
this.prevSelection = {
first: { x: selection.first.x, y: selection.first.y },
second: { x: selection.second.x, y: selection.second.y }
};
var x = Math.min(selection.first.x, selection.second.x),
y = Math.min(selection.first.y, selection.second.y),
w = Math.abs(selection.second.x - selection.first.x),
h = Math.abs(selection.second.y - selection.first.y);
octx.fillRect(x + plotOffset.left+0.5, y + plotOffset.top+0.5, w, h);
octx.strokeRect(x + plotOffset.left+0.5, y + plotOffset.top+0.5, w, h);
octx.restore();
},
/**
* Draws the selection box.
*/
drawCrosshair: function(pos) {
var octx = this.octx,
options = this.options,
plotOffset = this.plotOffset,
x = plotOffset.left+pos.relX+0.5,
y = plotOffset.top+pos.relY+0.5,
modeX = options.crosshair.mode.indexOf('x') != -1,
modeY = options.crosshair.mode.indexOf('y') != -1;
if (pos.relX < 0 || pos.relY < 0 || pos.relX > this.plotWidth || pos.relY > this.plotHeight) {
this.el.style.cursor = null;
this.el.removeClassName('flotr-crosshair');
return;
}
this.lastMousePos.relX = null;
this.lastMousePos.relY = null;
if (options.crosshair.hideCursor) {
this.el.style.cursor = 'url(blank.cur), crosshair';
this.el.addClassName('flotr-crosshair');
}
octx.save();
octx.strokeStyle = options.crosshair.color;
octx.lineWidth = 1;
octx.beginPath();
if (modeX) {
octx.moveTo(x, plotOffset.top);
octx.lineTo(x, plotOffset.top + this.plotHeight);
this.lastMousePos.relX = x;
}
if (modeY) {
octx.moveTo(plotOffset.left, y);
octx.lineTo(plotOffset.left + this.plotWidth, y);
this.lastMousePos.relY = y;
}
octx.stroke();
octx.restore();
},
/**
* Removes the selection box from the overlay canvas.
*/
clearCrosshair: function() {
if (this.lastMousePos.relX != null)
this.octx.clearRect(this.lastMousePos.relX-0.5,
this.plotOffset.top,
1,
this.plotHeight+1);
if (this.lastMousePos.relY != null)
this.octx.clearRect(this.plotOffset.left,
this.lastMousePos.relY-0.5,
this.plotWidth+1,
1);
},
/**
* Determines whether or not the selection is sane and should be drawn.
* @return {Boolean} - True when sane, false otherwise.
*/
selectionIsSane: function(){
return Math.abs(this.selection.second.x - this.selection.first.x) >= 5 &&
Math.abs(this.selection.second.y - this.selection.first.y) >= 5;
},
/**
* Removes the mouse tracking point from the overlay.
*/
clearHit: function(){
if(!this.prevHit) return;
var prevHit = this.prevHit,
plotOffset = this.plotOffset,
s = prevHit.series,
lw = s.bars.lineWidth;
if(!s.bars.show){
var r = s.points.radius;
this.octx.clearRect(
this.tHoz(prevHit.x, prevHit.xaxis) + plotOffset.left - r*2,
this.tVert(prevHit.y, prevHit.yaxis) + plotOffset.top - r*2,
r*3 + s.points.lineWidth*3,
r*3 + s.points.lineWidth*3
);
}
else {
var bw = s.bars.barWidth;
this.octx.clearRect(
this.tHoz(prevHit.x - bw/2, prevHit.xaxis) + plotOffset.left - lw,
this.tVert(prevHit.y, prevHit.yaxis) + plotOffset.top - lw,
this.tHoz(bw, prevHit.xaxis) + lw * 2,
this.tVert(0, prevHit.yaxis) + lw * 2
);
}
},
/**
* Updates the mouse tracking point on the overlay.
*/
drawHit: function(n){
var octx = this.octx,
s = n.series,
tHoz = this.tHoz.bind(this),
tVert = this.tVert.bind(this);
if(s.mouse.lineColor != null){
octx.save();
octx.lineWidth = s.points.lineWidth;
octx.strokeStyle = s.mouse.lineColor;
octx.fillStyle = Flotr.parseColor(s.mouse.fillColor || '#ffffff').scale(null,null,null, s.mouse.fillOpacity).toString();
if(!s.bars.show){
octx.translate(this.plotOffset.left, this.plotOffset.top);
octx.beginPath();
octx.arc(tHoz(n.x, n.xaxis), tVert(n.y, n.yaxis), s.mouse.radius, 0, 2 * Math.PI, true);
octx.fill();
octx.stroke();
}
else {
var bw = s.bars.barWidth;
octx.save();
octx.translate(this.plotOffset.left, this.plotOffset.top);
octx.beginPath();
octx.moveTo(tHoz(n.x-(bw/2), n.xaxis), tVert(n.yaxis.min, n.yaxis));
octx.lineTo(tHoz(n.x-(bw/2), n.xaxis), tVert(n.y, n.yaxis));
octx.lineTo(tHoz(n.x+(bw/2), n.xaxis), tVert(n.y, n.yaxis));
octx.lineTo(tHoz(n.x+(bw/2), n.xaxis), tVert(n.yaxis.min, n.yaxis));
octx.stroke();
octx.closePath();
if(s.mouse.fillColor){
octx.beginPath();
octx.moveTo(tHoz(n.x-(bw/2), n.xaxis), tVert(n.yaxis.min, n.yaxis));
octx.lineTo(tHoz(n.x-(bw/2), n.xaxis), tVert(n.y, n.yaxis));
octx.lineTo(tHoz(n.x+(bw/2), n.xaxis), tVert(n.y, n.yaxis));
octx.lineTo(tHoz(n.x+(bw/2), n.xaxis), tVert(n.yaxis.min, n.yaxis));
octx.fill();
octx.closePath();
}
octx.restore();
}
octx.restore();
}
this.prevHit = n;
},
/**
* Retrieves the nearest data point from the mouse cursor. If it's within
* a certain range, draw a point on the overlay canvas and display the x and y
* value of the data.
* @param {Object} mouse - Object that holds the relative x and y coordinates of the cursor.
*/
hit: function(mouse){
var series = this.series,
options = this.options,
prevHit = this.prevHit,
plotOffset = this.plotOffset,
octx = this.octx,
data, xsens, ysens, x, y, xa, ya, mx, my,
/**
* Nearest data element.
*/
i, n = {
dist:Number.MAX_VALUE,
x:null,
y:null,
relX:mouse.relX,
relY:mouse.relY,
absX:mouse.absX,
absY:mouse.absY,
mouse:null,
xaxis:null,
yaxis:null,
series:null,
index:null
};
for(i = 0; i < series.length; i++){
s = series[i];
if(!s.mouse.track) continue;
data = s.data;
xa = s.xaxis;
ya = s.yaxis;
xsens = (2*options.points.lineWidth)/xa.scale * s.mouse.sensibility;
ysens = (2*options.points.lineWidth)/ya.scale * s.mouse.sensibility;
mx = mouse.relX/xa.scale + xa.min;
my = -mouse.relY/ya.scale + ya.max;
for(var j = 0, xpow, ypow; j < data.length; j++){
x = data[j][0];
y = data[j][1];
if (y === null ||
xa.min > x || xa.max < x ||
ya.min > y || ya.max < y) continue;
var xdiff = Math.abs(x - mx),
ydiff = Math.abs(y - my);
// we use a different set of criteria to determin if there has been a hit
// depending on what type of graph we have
if(((!s.bars.show) && xdiff < xsens && ydiff < ysens) ||
(s.bars.show && xdiff < s.bars.barWidth/2 && my > ya.min && my < y)){
var distance = Math.sqrt(xdiff*xdiff + ydiff*ydiff);
if(distance < n.dist){
n.dist = distance;
n.x = x;
n.y = y;
n.xaxis = xa;
n.yaxis = ya;
n.mouse = s.mouse;
n.series = s;
n.index = j;
}
}
}
}
if(n.series && (n.mouse && n.mouse.track && !prevHit || (prevHit /*&& (n.x != prevHit.x || n.y != prevHit.y)*/))){
var mt = this.mouseTrack || this.el.select(".flotr-mouse-value")[0],
pos = '',
s = n.series,
p = n.mouse.position,
m = n.mouse.margin,
elStyle = 'opacity:0.7;background-color:#000;color:#fff;display:none;position:absolute;padding:2px 8px;-moz-border-radius:4px;border-radius:4px;white-space:nowrap;';
if (!n.mouse.relative) { // absolute to the canvas
if(p.charAt(0) == 'n') pos += 'top:' + (m + plotOffset.top) + 'px;';
else if(p.charAt(0) == 's') pos += 'bottom:' + (m + plotOffset.bottom) + 'px;';
if(p.charAt(1) == 'e') pos += 'right:' + (m + plotOffset.right) + 'px;';
else if(p.charAt(1) == 'w') pos += 'left:' + (m + plotOffset.left) + 'px;';
}
else { // relative to the mouse or in the case of bar like graphs to the bar
if(!s.bars.show){
if(p.charAt(0) == 'n') pos += 'bottom:' + (m - plotOffset.top - this.tVert(n.y, n.yaxis) + this.canvasHeight) + 'px;';
else if(p.charAt(0) == 's') pos += 'top:' + (m + plotOffset.top + this.tVert(n.y, n.yaxis)) + 'px;';
if(p.charAt(1) == 'e') pos += 'left:' + (m + plotOffset.left + this.tHoz(n.x, n.xaxis)) + 'px;';
else if(p.charAt(1) == 'w') pos += 'right:' + (m - plotOffset.left - this.tHoz(n.x, n.xaxis) + this.canvasWidth) + 'px;';
}
else {
pos += 'bottom:' + (m - plotOffset.top - this.tVert(n.yaxis.min+((n.y-n.yaxis.min)/2), n.yaxis) + this.canvasHeight) + 'px;';
pos += 'left:' + (m + plotOffset.left + this.tHoz(n.x - options.bars.barWidth/2 , n.xaxis)) + 'px;';
}
}
elStyle += pos;
if(!mt){
this.el.insert('<div class="flotr-mouse-value" style="'+elStyle+'"></div>');
mt = this.mouseTrack = this.el.select('.flotr-mouse-value').first();
}
else {
this.mouseTrack = mt.setStyle(elStyle);
}
if(n.x !== null && n.y !== null){
mt.show();
this.clearHit();
this.drawHit(n);
var decimals = n.mouse.trackDecimals;
if(decimals == null || decimals < 0) decimals = 0;
mt.innerHTML = n.mouse.trackFormatter({x: n.x.toFixed(decimals), y: n.y.toFixed(decimals), series: n.series, index: n.index});
mt.fire('flotr:hit', [n, this]);
}
else if(prevHit){
mt.hide();
this.clearHit();
}
}
else if(this.prevHit) {
this.mouseTrack.hide();
this.clearHit();
}
},
saveImage: function (type, width, height, replaceCanvas) {
var image = null;
switch (type) {
case 'jpeg':
case 'jpg': image = Canvas2Image.saveAsJPEG(this.canvas, replaceCanvas, width, height); break;
default:
case 'png': image = Canvas2Image.saveAsPNG(this.canvas, replaceCanvas, width, height); break;
case 'bmp': image = Canvas2Image.saveAsBMP(this.canvas, replaceCanvas, width, height); break;
}
if (Object.isElement(image) && replaceCanvas) {
this.restoreCanvas();
this.canvas.hide();
this.overlay.hide();
this.el.insert(image.setStyle({position: 'absolute'}));
}
},
restoreCanvas: function() {
this.canvas.show();
this.overlay.show();
this.el.select('img').invoke('remove');
}
});
Flotr.Color = Class.create({
initialize: function(r, g, b, a){
this.rgba = ['r','g','b','a'];
var x = 4;
while(-1<--x){
this[this.rgba[x]] = arguments[x] || ((x==3) ? 1.0 : 0);
}
this.normalize();
},
adjust: function(rd, gd, bd, ad) {
var x = 4;
while(-1<--x){
if(arguments[x] != null)
this[this.rgba[x]] += arguments[x];
}
return this.normalize();
},
clone: function(){
return new Flotr.Color(this.r, this.b, this.g, this.a);
},
limit: function(val,minVal,maxVal){
return Math.max(Math.min(val, maxVal), minVal);
},
normalize: function(){
var limit = this.limit;
this.r = limit(parseInt(this.r), 0, 255);
this.g = limit(parseInt(this.g), 0, 255);
this.b = limit(parseInt(this.b), 0, 255);
this.a = limit(this.a, 0, 1);
return this;
},
scale: function(rf, gf, bf, af){
var x = 4;
while(-1<--x){
if(arguments[x] != null)
this[this.rgba[x]] *= arguments[x];
}
return this.normalize();
},
distance: function(color){
if (!color) return;
color = new Flotr.parseColor(color);
var dist = 0, x = 3;
while(-1<--x){
dist += Math.abs(this[this.rgba[x]] - color[this.rgba[x]]);
}
return dist;
},
toString: function(){
return (this.a >= 1.0) ? 'rgb('+[this.r,this.g,this.b].join(',')+')' : 'rgba('+[this.r,this.g,this.b,this.a].join(',')+')';
}
});
Flotr.Color.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]
};
// not used yet
Flotr.Date = {
format: function(d, format) {
if (!d) return;
var leftPad = function(n) {
n = n.toString();
return n.length == 1 ? "0" + n : n;
};
var r = [], c,
escape = false;
for (var i = 0; i < format.length; ++i) {
c = format.charAt(i);
if (escape) {
switch (c) {
case 'h': c = d.getUTCHours().toString(); break;
case 'H': c = leftPad(d.getUTCHours()); break;
case 'M': c = leftPad(d.getUTCMinutes()); break;
case 'S': c = leftPad(d.getUTCSeconds()); break;
case 'd': c = d.getUTCDate().toString(); break;
case 'm': c = (d.getUTCMonth() + 1).toString(); break;
case 'y': c = d.getUTCFullYear().toString(); break;
case 'b': c = Flotr.Date.monthNames[d.getUTCMonth()]; break;
}
r.push(c);
escape = false;
}
else {
if (c == "%")
escape = true;
else
r.push(c);
}
}
return r.join("");
},
formatter: function (v, axis) {
var d = new Date(v);
// first check global format
if (axis.options.timeformat != null)
return Flotr.Date.format(d, axis.options.timeformat);
var t = axis.tickSize[0] * Flotr.Date.timeUnits[axis.tickSize[1]],
span = axis.max - axis.min;
if (t < Flotr.Date.timeUnits.minute)
fmt = "%h:%M:%S";
else if (t < Flotr.Date.timeUnits.day)
fmt = (span < 2 * Flotr.Date.timeUnits.day) ? "%h:%M" : "%b %d %h:%M";
else if (t < Flotr.Date.timeUnits.month)
fmt = "%b %d";
else if (t < Flotr.Date.timeUnits.year)
fmt = (span < Flotr.Date.timeUnits.year) ? "%b" : "%b %y";
else
fmt = "%y";
return Flotr.Date.format(d, fmt);
},
generator: function(axis) {
var ticks = [],
tickSize = axis.tickSize[0], unit = axis.tickSize[1],
d = new Date(axis.min),
step = tickSize * timeUnitSize[unit];
switch (unit) {
case "second": d.setUTCSeconds(floorInBase(d.getUTCSeconds(), tickSize)); break;
case "minute": d.setUTCMinutes(floorInBase(d.getUTCMinutes(), tickSize)); break;
case "hour": d.setUTCHours(floorInBase(d.getUTCHours(), tickSize)); break;
case "month": d.setUTCMonth(floorInBase(d.getUTCMonth(), tickSize)); break;
case "year": d.setUTCFullYear(floorInBase(d.getUTCFullYear(), tickSize));break;
}
// reset smaller components
d.setUTCMilliseconds(0);
if (step >= timeUnitSize.minute) d.setUTCSeconds(0);
if (step >= timeUnitSize.hour) d.setUTCMinutes(0);
if (step >= timeUnitSize.day) d.setUTCHours(0);
if (step >= timeUnitSize.day * 4) d.setUTCDate(1);
if (step >= timeUnitSize.year) d.setUTCMonth(0);
var carry = 0, v = Number.NaN, prev;
do {
prev = v;
v = d.getTime();
ticks.push({ v: v, label: axis.tickFormatter(v, axis) });
if (unit == "month") {
if (tickSize < 1) {
/* a bit complicated - we'll divide the month up but we need to take care of fractions
so we don't end up in the middle of a day */
d.setUTCDate(1);
var start = d.getTime();
d.setUTCMonth(d.getUTCMonth() + 1);
var end = d.getTime();
d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
carry = d.getUTCHours();
d.setUTCHours(0);
}
else
d.setUTCMonth(d.getUTCMonth() + tickSize);
}
else if (unit == "year") {
d.setUTCFullYear(d.getUTCFullYear() + tickSize);
}
else
d.setTime(v + step);
} while (v < axis.max && v != prev);
return ticks;
},
timeUnits: {
second: 1000,
minute: 1000 * 60,
hour: 1000 * 60 * 60,
day: 1000 * 60 * 60 * 24,
month: 1000 * 60 * 60 * 24 * 30,
year: 1000 * 60 * 60 * 24 * 30 * 365.2425
},
// the allowed tick sizes, after 1 year we use an integer algorithm
spec: [
[1, "second"], [2, "second"], [5, "second"], [10, "second"], [30, "second"],
[1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"], [30, "minute"],
[1, "hour"], [2, "hour"], [4, "hour"], [8, "hour"], [12, "hour"],
[1, "day"], [2, "day"], [3, "day"],
[0.25, "month"], [0.5, "month"], [1, "month"], [2, "month"], [3, "month"], [6, "month"],
[1, "year"]
],
monthNames: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
};