// version: 2017-11-25
/**
* o--------------------------------------------------------------------------------o
* | This file is part of the RGraph package - you can learn more at: |
* | |
* | http://www.rgraph.net |
* | |
* | RGraph is licensed under the Open Source MIT license. That means that it's |
* | totally free to use and there are no restrictions on what you can do with it! |
* o--------------------------------------------------------------------------------o
*/
RGraph = window.RGraph || {isRGraph: true};
/**
* The chart constuctor
*
* @param object canvas
* @param array data
*/
RGraph.RScatter =
RGraph.Rscatter = function (conf)
{
/**
* Allow for object config style
*/
if ( typeof conf === 'object'
&& typeof conf.data === 'object'
&& typeof conf.id === 'string') {
var parseConfObjectForOptions = true; // Set this so the config is parsed (at the end of the constructor)
this.data = new Array(conf.data.length);
// Store the data set(s)
this.data = RGraph.arrayClone(conf.data);
// Account for just one dataset being given
if (typeof conf.data === 'object' && typeof conf.data[0] === 'object' && typeof conf.data[0][0] === 'number') {
var tmp = RGraph.arrayClone(conf.data);
conf.data = new Array();
conf.data[0] = RGraph.arrayClone(tmp);
this.data = RGraph.arrayClone(conf.data);
}
} else {
var conf = {id: conf};
conf.data = arguments[1];
this.data = [];
// Handle multiple datasets being given as one argument
if (arguments[1][0] && arguments[1][0][0] && typeof arguments[1][0][0] == 'object') {
// Store the data set(s)
for (var i=0; i<arguments[1].length; ++i) {
this.data[i] = arguments[1][i];
}
// Handle multiple data sets being supplied as seperate arguments
} else {
// Store the data set(s)
for (var i=1; i<arguments.length; ++i) {
this.data[i - 1] = RGraph.arrayClone(arguments[i]);
}
}
}
this.id = conf.id
this.canvas = document.getElementById(this.id)
this.context = this.canvas.getContext ? this.canvas.getContext("2d") : null;
this.canvas.__object__ = this;
this.type = 'rscatter';
this.hasTooltips = false;
this.isRGraph = true;
this.uid = RGraph.CreateUID();
this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.CreateUID();
this.colorsParsed = false;
this.coordsText = [];
this.original_colors = [];
this.firstDraw = true; // After the first draw this will be false
this.centerx = 0;
this.centery = 0;
this.radius = 0;
this.max = 0;
// Convert all of the data pieces to numbers
for (var i=0; i<this.data.length; ++i) {
for (var j=0; j<this.data[i].length; ++j) {
if (typeof this.data[i][j][0] === 'string') {
this.data[i][j][0] = parseFloat(this.data[i][j][0]);
}
if (typeof this.data[i][j][1] === 'string') {
this.data[i][j][1] = parseFloat(this.data[i][j][1]);
}
}
}
this.properties =
{
'chart.background.color': 'transparent',
'chart.background.grid': true,
'chart.background.grid.diagonals': true,
'chart.background.grid.diagonals.count': null,
'chart.background.grid.radials': true,
'chart.background.grid.radials.count': null,
'chart.background.grid.linewidth': 1,
'chart.background.grid.color': '#ccc',
'chart.radius': null,
'chart.colors': [], // This is used internally for the key
'chart.colors.default': 'black',
'chart.gutter.left': 25,
'chart.gutter.right': 25,
'chart.gutter.top': 25,
'chart.gutter.bottom': 25,
'chart.title': '',
'chart.title.background': null,
'chart.title.hpos': null,
'chart.title.vpos': null,
'chart.title.bold': true,
'chart.title.font': null,
'chart.title.x': null,
'chart.title.y': null,
'chart.title.halign': null,
'chart.title.valign': null,
'chart.labels': null,
'chart.labels.color': null,
'chart.labels.axes': 'nsew',
'chart.labels.axes.background': 'rgba(255,255,255,0.8)',
'chart.labels.count': 5,
'chart.text.color': 'black',
'chart.text.font': 'Segoe UI, Arial, Verdana, sans-serif',
'chart.text.size': 12,
'chart.text.accessible': true,
'chart.text.accessible.overflow': 'visible',
'chart.text.accessible.pointerevents': true,
'chart.key': null,
'chart.key.background': 'white',
'chart.key.position': 'graph',
'chart.key.halign': 'right',
'chart.key.shadow': false,
'chart.key.shadow.color': '#666',
'chart.key.shadow.blur': 3,
'chart.key.shadow.offsetx': 2,
'chart.key.shadow.offsety': 2,
'chart.key.position.gutter.boxed':false,
'chart.key.position.x': null,
'chart.key.position.y': null,
'chart.key.color.shape': 'square',
'chart.key.rounded': true,
'chart.key.linewidth': 1,
'chart.key.colors': null,
'chart.key.interactive': false,
'chart.key.interactive.highlight.chart.fill':'rgba(255,0,0,0.9)',
'chart.key.interactive.highlight.label':'rgba(255,0,0,0.2)',
'chart.key.text.color': 'black',
'chart.contextmenu': null,
'chart.tooltips': null,
'chart.tooltips.event': 'onmousemove',
'chart.tooltips.effect': 'fade',
'chart.tooltips.css.class': 'RGraph_tooltip',
'chart.tooltips.highlight': true,
'chart.tooltips.hotspot': 3,
'chart.tooltips.coords.page': false,
'chart.annotatable': false,
'chart.annotate.color': 'black',
'chart.zoom.factor': 1.5,
'chart.zoom.fade.in': true,
'chart.zoom.fade.out': true,
'chart.zoom.hdir': 'right',
'chart.zoom.vdir': 'down',
'chart.zoom.frames': 25,
'chart.zoom.delay': 16.666,
'chart.zoom.shadow': true,
'chart.zoom.background': true,
'chart.zoom.action': 'zoom',
'chart.resizable': false,
'chart.resize.handle.background': null,
'chart.ymax': null,
'chart.ymin': 0,
'chart.tickmarks': 'cross',
'chart.ticksize': 3,
'chart.scale.decimals': null,
'chart.scale.point': '.',
'chart.scale.thousand': ',',
'chart.scale.round': false,
'chart.scale.zerostart': true,
'chart.units.pre': '',
'chart.units.post': '',
'chart.events.mousemove': null,
'chart.events.click': null,
'chart.highlight.stroke': 'transparent',
'chart.highlight.fill': 'rgba(255,255,255,0.7)',
'chart.highlight.point.radius': 3,
'chart.axes.color': 'black',
'chart.axes.numticks': null,
'chart.axes.caps': true,
'chart.segment.highlight': false,
'chart.segment.highlight.count': null,
'chart.segment.highlight.fill': 'rgba(0,255,0,0.5)',
'chart.segment.highlight.stroke':'rgba(0,0,0,0)',
'chart.line': false,
'chart.line.close': false,
'chart.line.linewidth': 1,
'chart.line.colors': ['black'],
'chart.line.shadow': false,
'chart.line.shadow.color': 'black',
'chart.line.shadow.blur': 2,
'chart.line.shadow.offsetx': 3,
'chart.line.shadow.offsety': 3,
'chart.clearto': 'rgba(0,0,0,0)'
}
/**
* Create the $ objects so that functions can be added to them
*/
for (var i=0,idx=0; i<this.data.length; ++i) {
for (var j=0,len=this.data[i].length; j<len; j+=1,idx+=1) {
this['$' + idx] = {}
}
}
/**
* Translate half a pixel for antialiasing purposes - but only if it hasn't beeen
* done already
*/
if (!this.canvas.__rgraph_aa_translated__) {
this.context.translate(0.5,0.5);
this.canvas.__rgraph_aa_translated__ = true;
}
// Short variable names
var RG = RGraph,
ca = this.canvas,
co = ca.getContext('2d'),
prop = this.properties,
pa2 = RG.path2,
win = window,
doc = document,
ma = Math
/**
* "Decorate" the object with the generic effects if the effects library has been included
*/
if (RG.Effects && typeof RG.Effects.decorate === 'function') {
RG.Effects.decorate(this);
}
/**
* A simple setter
*
* @param string name The name of the property to set
* @param string value The value of the property
*/
this.set =
this.Set = function (name, value)
{
var value = typeof arguments[1] === 'undefined' ? null : arguments[1];
/**
* the number of arguments is only one and it's an
* object - parse it for configuration data and return.
*/
if (arguments.length === 1 && typeof name === 'object') {
RG.parseObjectStyleConfig(this, name);
return this;
}
/**
* This should be done first - prepend the property name with "chart." if necessary
*/
if (name.substr(0,6) != 'chart.') {
name = 'chart.' + name;
}
// Convert uppercase letters to dot+lower case letter
while(name.match(/([A-Z])/)) {
name = name.replace(/([A-Z])/, '.' + RegExp.$1.toLowerCase());
}
//
// Change chart.segments.highlight* to chart.segment.highlight (no plural)
//
if (name === 'chart.segments.highlight') name = 'chart.segment.highlight';
if (name === 'chart.segments.highlight.count') name = 'chart.segment.highlight.count';
if (name === 'chart.segments.highlight.fill') name = 'chart.segment.highlight.fill';
if (name === 'chart.segments.highlight.stroke') name = 'chart.segment.highlight.stroke';
prop[name.toLowerCase()] = value;
return this;
};
/**
* A simple getter
*
* @param string name The name of the property to get
*/
this.get =
this.Get = function (name)
{
/**
* This should be done first - prepend the property name with "chart." if necessary
*/
if (name.substr(0,6) != 'chart.') {
name = 'chart.' + name;
}
// Convert uppercase letters to dot+lower case letter
while(name.match(/([A-Z])/)) {
name = name.replace(/([A-Z])/, '.' + RegExp.$1.toLowerCase());
}
return prop[name.toLowerCase()];
};
/**
* This method draws the rose chart
*/
this.draw =
this.Draw = function ()
{
/**
* Fire the onbeforedraw event
*/
RG.FireCustomEvent(this, 'onbeforedraw');
/**
* This doesn't affect the chart, but is used for compatibility
*/
this.gutterLeft = prop['chart.gutter.left'];
this.gutterRight = prop['chart.gutter.right'];
this.gutterTop = prop['chart.gutter.top'];
this.gutterBottom = prop['chart.gutter.bottom'];
// Calculate the radius
this.radius = (Math.min(ca.width - this.gutterLeft - this.gutterRight, ca.height - this.gutterTop - this.gutterBottom) / 2);
this.centerx = ((ca.width - this.gutterLeft - this.gutterRight) / 2) + this.gutterLeft;
this.centery = ((ca.height - this.gutterTop - this.gutterBottom) / 2) + this.gutterTop;
this.coords = [];
this.coords2 = [];
/**
* Stop this growing uncontrollably
*/
this.coordsText = [];
/**
* If there's a user specified radius/centerx/centery, use them
*/
if (typeof(prop['chart.centerx']) == 'number') this.centerx = prop['chart.centerx'];
if (typeof(prop['chart.centery']) == 'number') this.centery = prop['chart.centery'];
if (typeof(prop['chart.radius']) == 'number') this.radius = prop['chart.radius'];
/**
* Parse the colors for gradients. Its down here so that the center X/Y can be used
*/
if (!this.colorsParsed) {
this.parseColors();
// Don't want to do this again
this.colorsParsed = true;
}
/**
* Work out the scale
*/
var max = prop['chart.ymax'];
var min = prop['chart.ymin'];
if (typeof(max) == 'number') {
this.max = max;
this.scale2 = RG.getScale2(this, {
'max':max,
'min':min,
'strict':true,
'scale.decimals':Number(prop['chart.scale.decimals']),
'scale.point':prop['chart.scale.point'],
'scale.thousand':prop['chart.scale.thousand'],
'scale.round':prop['chart.scale.round'],
'units.pre':prop['chart.units.pre'],
'units.post':prop['chart.units.post'],
'ylabels.count':prop['chart.labels.count']
});
} else {
for (var i=0; i<this.data.length; i+=1) {
for (var j=0,len=this.data[i].length; j<len; j+=1) {
this.max = Math.max(this.max, this.data[i][j][1]);
}
}
this.min = prop['chart.ymin'];
this.scale2 = RG.getScale2(this, {
'max':this.max,
'min':min,
'scale.decimals':Number(prop['chart.scale.decimals']),
'scale.point':prop['chart.scale.point'],
'scale.thousand':prop['chart.scale.thousand'],
'scale.round':prop['chart.scale.round'],
'units.pre':prop['chart.units.pre'],
'units.post':prop['chart.units.post'],
'ylabels.count':prop['chart.labels.count']
});
this.max = this.scale2.max;
}
/**
* Change the centerx marginally if the key is defined
*/
if (prop['chart.key'] && prop['chart.key'].length > 0 && prop['chart.key'].length >= 3) {
this.centerx = this.centerx - prop['chart.gutter.right'] + 5;
}
/**
* Populate the colors array for the purposes of generating the key
*/
if (typeof(prop['chart.key']) == 'object' && RG.is_array(prop['chart.key']) && prop['chart.key'][0]) {
// Reset the colors array
prop['chart.colors'] = [];
for (var i=0; i<this.data.length; i+=1) {
for (var j=0,len=this.data[i].length; j<len; j+=1) {
if (typeof this.data[i][j][2] == 'string') {
prop['chart.colors'].push(this.data[i][j][2]);
}
}
}
}
/**
* Populate the chart.tooltips array
*/
this.Set('chart.tooltips', []);
for (var i=0; i<this.data.length; i+=1) {
for (var j=0,len=this.data[i].length; j<len; j+=1) {
if (typeof this.data[i][j][3] == 'string') {
prop['chart.tooltips'].push(this.data[i][j][3]);
}
}
}
// This resets the chart drawing state
co.beginPath();
this.DrawBackground();
this.DrawRscatter();
this.DrawLabels();
/**
* Setup the context menu if required
*/
if (prop['chart.contextmenu']) {
RG.ShowContext(this);
}
// Draw the title if any has been set
if (prop['chart.title']) {
RG.DrawTitle(
this,
prop['chart.title'],
this.centery - this.radius - 10,
this.centerx,
prop['chart.title.size'] ? prop['chart.title.size'] : prop['chart.text.size'] + 2
);
}
/**
* This function enables resizing
*/
if (prop['chart.resizable']) {
RG.AllowResizing(this);
}
/**
* This installs the event listeners
*/
RG.InstallEventListeners(this);
//
// Allow the segments to be highlighted
//
if (prop['chart.segment.highlight']) {
RG.allowSegmentHighlight({
object: this,
// This is duplicated in the drawBackground function
count: typeof prop['chart.segment.highlight.count'] === 'number' ? prop['chart.segment.highlight.count'] : ((prop['chart.background.grid.diagonals.count'] ? prop['chart.background.grid.diagonals.count'] : (prop['chart.labels'] ? prop['chart.labels'].length : 8))),
fill: prop['chart.segment.highlight.fill'],
stroke: prop['chart.segment.highlight.stroke']
});
}
/**
* Fire the onfirstdraw event
*/
if (this.firstDraw) {
this.firstDraw = false;
RG.fireCustomEvent(this, 'onfirstdraw');
this.firstDrawFunc();
}
/**
* Fire the RGraph ondraw event
*/
RG.FireCustomEvent(this, 'ondraw');
return this;
};
/**
* This method draws the rscatter charts background
*/
this.drawBackground =
this.DrawBackground = function ()
{
//
// Draw the background color first
//
if (prop['chart.background.color'] != 'transparent') {
pa2(co, ['b','a', this.centerx, this.centery, this.radius, 0, 2 * ma.PI, -1, 'f', prop['chart.background.color']]);
}
var gridEnabled = prop['chart.background.grid'];
if (gridEnabled) {
co.lineWidth = prop['chart.background.grid.linewidth'];
// Draw the background grey circles
if (prop['chart.background.grid.radials']) {
co.strokeStyle = prop['chart.background.grid.color'];
if (RG.isNull(prop['chart.background.grid.radials.count'])) {
prop['chart.background.grid.radials.count'] = prop['chart.labels.count'];
}
// Radius must be greater than 0 for Opera to work
var r = this.radius / prop['chart.background.grid.radials.count'];
for (var i=0,len=this.radius; i<=len; i+=r) {
// Radius must be greater than 0 for Opera to work
co.arc(this.centerx, this.centery, i, 0, RG.TWOPI, 0);
}
co.stroke();
}
// Draw the background lines that go from the center outwards
if (prop['chart.background.grid.diagonals']) {
co.strokeStyle = prop['chart.background.grid.color'];
co.beginPath();
// This is duplicated in the allowSegmentHighlight call
var inc = 360 / ((prop['chart.background.grid.diagonals.count'] ? prop['chart.background.grid.diagonals.count'] : (prop['chart.labels'] ? prop['chart.labels'].length : 8)));
for (var i=inc; i<360; i+=inc) {
// Radius must be greater than 0 for Opera to work
co.arc(
this.centerx,
this.centery,
this.radius,
(i / (180 / RG.PI)) - RG.HALFPI,
((i + 0.01) / (180 / RG.PI)) - RG.HALFPI,
0
);
co.lineTo(this.centerx, this.centery);
}
co.stroke();
}
}
// Reset the linewidth
co.lineWidth = 1;
co.beginPath();
co.strokeStyle = prop['chart.axes.color'];
// Draw the X axis
co.moveTo(this.centerx - this.radius, Math.round(this.centery));
co.lineTo(this.centerx + this.radius, Math.round(this.centery));
// Draw the X ends
if (prop['chart.axes.caps']) {
co.moveTo(ma.round(this.centerx - this.radius), this.centery - 5);
co.lineTo(ma.round(this.centerx - this.radius), this.centery + 5);
co.moveTo(ma.round(this.centerx + this.radius), this.centery - 5);
co.lineTo(ma.round(this.centerx + this.radius), this.centery + 5);
}
if (!RG.isNull(prop['chart.axes.numticks'])) {
var numticks = prop['chart.axes.numticks']
} else {
var numticks = prop['chart.labels.count'];
}
var caps = prop['chart.axes.caps'];
if (numticks) {
// Draw the X check marks
for (var i=(this.centerx - this.radius); i<(this.centerx + this.radius); i+=(this.radius / numticks)) {
co.moveTo(ma.round(i), this.centery - 3);
co.lineTo(ma.round(i), this.centery + 3);
}
// Draw the Y check marks
for (var i=(this.centery - this.radius); i<(this.centery + this.radius); i+=(this.radius / numticks)) {
co.moveTo(this.centerx - 3, ma.round(i));
co.lineTo(this.centerx + 3, ma.round(i));
}
}
// Draw the Y axis
co.moveTo(ma.round(this.centerx), this.centery - this.radius);
co.lineTo(ma.round(this.centerx), this.centery + this.radius);
// Draw the Y ends
if (prop['chart.axes.caps']) {
co.moveTo(this.centerx - 5, ma.round(this.centery - this.radius));
co.lineTo(this.centerx + 5, ma.round(this.centery - this.radius));
co.moveTo(this.centerx - 5, ma.round(this.centery + this.radius));
co.lineTo(this.centerx + 5, ma.round(this.centery + this.radius));
}
// Stroke it
co.closePath();
co.stroke();
};
/**
* This method draws a set of data on the graph
*/
this.drawRscatter =
this.DrawRscatter = function ()
{
for (var dataset=0; dataset<this.data.length; dataset+=1) {
var data = this.data[dataset];
// Don't do this
// this.coords = [];
this.coords2[dataset] = [];
var drawPoints = function (obj)
{
for (var i=0; i<data.length; ++i) {
var d1 = data[i][0],
d2 = data[i][1],
a = d1 / (180 / RG.PI), // RADIANS
r = ( (d2 - prop['chart.ymin']) / (obj.scale2.max - obj.scale2.min) ) * obj.radius,
x = ma.sin(a) * r,
y = ma.cos(a) * r,
color = data[i][2] ? data[i][2] : prop['chart.colors.default'],
tooltip = data[i][3] ? data[i][3] : null
if (tooltip && String(tooltip).length) {
obj.hasTooltips = true;
}
/**
* Account for the correct quadrant
*/
x = x + obj.centerx;
y = obj.centery - y;
obj.drawTick(x, y, color);
// Populate the coords array with the coordinates and the tooltip
obj.coords.push([x, y, color, tooltip]);
obj.coords2[dataset].push([x, y, color, tooltip]);
}
}
drawPoints(this);
if (prop['chart.line']) {
this.drawLine(dataset);
}
// Causes tooltips not to appear sometimes on this demo page:
// /demos/rscatter-multiple-datasets-single-array.html
//
//drawPoints(this);
}
};
/*
* Draws a connecting line through the points if requested
*
* @param object opt The options to the line
*/
this.drawLine = function (idx)
{
var opt = {
dataset: idx,
coords: this.coords2[idx],
color: prop['chart.line.colors'][idx],
shadow: prop['chart.line.shadow'],
shadowColor: prop['chart.line.shadow.color'],
shadowOffsetX: prop['chart.line.shadow.offsetx'],
shadowOffsetY: prop['chart.line.shadow.offsety'],
shadowBlur: prop['chart.line.shadow.blur'],
linewidth: prop['chart.line.linewidth']
};
co.beginPath();
co.strokeStyle = this.parseSingleColorForGradient(opt.color);
co.lineWidth = typeof prop['chart.line.linewidth'] === 'object' ? prop['chart.line.linewidth'][idx] : prop['chart.line.linewidth'];
co.lineCap = 'round';
if (opt.shadow) {
RG.setShadow(
this,
opt.shadowColor,
opt.shadowOffsetX,
opt.shadowOffsetY,
opt.shadowBlur
);
}
for (var i=0; i<this.coords2[idx].length; ++i) {
if (i === 0) {
co.moveTo(this.coords2[idx][i][0], this.coords2[idx][i][1]);
var startCoords = RG.arrayClone(this.coords2[idx]);
} else {
co.lineTo(this.coords2[idx][i][0], this.coords2[idx][i][1]);
}
}
// Draw the line back to the start?
if (
(typeof prop['chart.line.close'] === 'boolean' && prop['chart.line.close'])
|| (typeof prop['chart.line.close'] === 'object' && prop['chart.line.close'][idx])
) {
co.lineTo(this.coords2[idx][0][0], this.coords2[idx][0][1]);
}
co.stroke();
RG.noShadow(this);
};
/**
* Unsuprisingly, draws the labels
*/
this.drawLabels =
this.DrawLabels = function ()
{
co.lineWidth = 1;
// Default the color to black
co.fillStyle = 'black';
co.strokeStyle = 'black';
var key = prop['chart.key'];
var r = this.radius;
var axesColor = prop['chart.axes.color'];
var color = prop['chart.text.color'];
var font = prop['chart.text.font'];
var size = prop['chart.text.size'];
var axes = prop['chart.labels.axes'].toLowerCase();
var units_pre = prop['chart.units.pre'];
var units_post = prop['chart.units.post'];
var decimals = prop['chart.scale.decimals'];
var centerx = this.centerx;
var centery = this.centery;
co.fillStyle = prop['chart.text.color'];
// Draw any labels
if (typeof prop['chart.labels'] == 'object' && prop['chart.labels']) {
this.DrawCircularLabels(co, prop['chart.labels'], font , size, r);
}
//
// If the axes are transparent - then the labels should have no offset,
// otherwise it defaults to true. Similarly the labels can or can't be
// centered if there's no axes
//
var offset = 10;
var centered = false;
if ( axesColor === 'rgba(0,0,0,0)'
|| axesColor === 'rgb(0,0,0)'
|| axesColor === 'transparent') {
offset = 0;
centered = true;
}
// Draw the axis labels
for (var i=0,len=this.scale2.labels.length; i<len; ++i) {
if (axes.indexOf('n') > -1) RG.text2(this, {'tag': 'scale','font':font,'size':size,'x':centerx - offset,'y':centery - (r * ((i+1) / len)),'text':this.scale2.labels[i],'valign':'center','halign':centered ? 'center' : 'right',bounding: true, boundingFill: prop['chart.labels.axes.background'], boundingStroke: 'rgba(0,0,0,0)'});
if (axes.indexOf('s') > -1) RG.text2(this, {'tag': 'scale','font':font,'size':size,'x':centerx - offset,'y':centery + (r * ((i+1) / len)),'text':this.scale2.labels[i],'valign':'center','halign':centered ? 'center' : 'right',bounding: true, boundingFill: prop['chart.labels.axes.background'], boundingStroke: 'rgba(0,0,0,0)'});
if (axes.indexOf('e') > -1) RG.text2(this, {'tag': 'scale','font':font,'size':size,'x':centerx + (r * ((i+1) / len)),'y':centery + offset,'text':this.scale2.labels[i],'valign':centered ? 'center' : 'top','halign':'center',bounding: true, boundingFill: prop['chart.labels.axes.background'], boundingStroke: 'rgba(0,0,0,0)'});
if (axes.indexOf('w') > -1) RG.text2(this, {'tag': 'scale','font':font,'size':size,'x':centerx - (r * ((i+1) / len)),'y':centery + offset,'text':this.scale2.labels[i],'valign':centered ? 'center' : 'top','halign':'center',bounding: true, boundingFill: prop['chart.labels.axes.background'], boundingStroke: 'rgba(0,0,0,0)'});
}
// Draw the center minimum value (but only if there's at least one axes labels stipulated)
if (prop['chart.labels.axes'].length > 0 && prop['chart.scale.zerostart']) {
RG.text2(this, {
'font':font,
'size':size,
'x':centerx,
'y':centery,
'text':RG.numberFormat(this, Number(this.scale2.min).toFixed(this.scale2.decimals), this.scale2.units_pre, this.scale2.units_post),
'valign':'center',
'halign':'center',
'bounding':true,
'boundingFill': prop['chart.labels.axes.background'],
'boundingStroke': 'rgba(0,0,0,0)',
'tag': 'scale'
});
}
/**
* Draw the key
*/
if (key && key.length) {
RG.drawKey(this, key, prop['chart.colors']);
}
};
/**
* Draws the circular labels that go around the charts
*
* @param labels array The labels that go around the chart
*/
this.drawCircularLabels =
this.DrawCircularLabels = function (context, labels, font_face, font_size, r)
{
var r = r + 10,
color = prop['chart.labels.color'];
for (var i=0; i<labels.length; ++i) {
var a = (360 / labels.length) * (i + 1) - (360 / (labels.length * 2));
var a = a - 90 + (prop['chart.labels.position'] == 'edge' ? ((360 / labels.length) / 2) : 0);
var x = ma.cos(a / (180/RG.PI) ) * r;
var y = ma.sin(a / (180/RG.PI)) * r;
RG.Text2(this, {
'color': color,
'font':font_face,
'size':font_size,
'x':this.centerx + x,
'y':this.centery + y,
'text':String(labels[i]),
'valign':'center',
'halign':( (this.centerx + x) > this.centerx) ? 'left' : 'right',
'tag': 'labels'
});
}
};
/**
* Draws a single tickmark
*/
this.drawTick =
this.DrawTick = function (x, y, color)
{
var tickmarks = prop['chart.tickmarks'];
var ticksize = prop['chart.ticksize'];
co.strokeStyle = color;
co.fillStyle = color;
// Set the linewidth for the tickmark to 1
var prevLinewidth = co.lineWidth;
co.lineWidth = 1;
// Cross
if (tickmarks == 'cross') {
co.beginPath();
co.moveTo(x + ticksize, y + ticksize);
co.lineTo(x - ticksize, y - ticksize);
co.stroke();
co.beginPath();
co.moveTo(x - ticksize, y + ticksize);
co.lineTo(x + ticksize, y - ticksize);
co.stroke();
// Circle
} else if (tickmarks == 'circle') {
co.beginPath();
co.arc(x, y, ticksize, 0, 6.2830, false);
co.fill();
// Square
} else if (tickmarks == 'square') {
co.beginPath();
co.fillRect(x - ticksize, y - ticksize, 2 * ticksize, 2 * ticksize);
co.fill();
// Diamond shape tickmarks
} else if (tickmarks == 'diamond') {
co.beginPath();
co.moveTo(x, y - ticksize);
co.lineTo(x + ticksize, y);
co.lineTo(x, y + ticksize);
co.lineTo(x - ticksize, y);
co.closePath();
co.fill();
// Plus style tickmarks
} else if (tickmarks == 'plus') {
co.lineWidth = 1;
co.beginPath();
co.moveTo(x, y - ticksize);
co.lineTo(x, y + ticksize);
co.moveTo(x - ticksize, y);
co.lineTo(x + ticksize, y);
co.stroke();
}
co.lineWidth = prevLinewidth;
};
/**
* This function makes it much easier to get the (if any) point that is currently being hovered over.
*
* @param object e The event object
*/
this.getShape =
this.getPoint = function (e)
{
var mouseXY = RG.getMouseXY(e);
var mouseX = mouseXY[0];
var mouseY = mouseXY[1];
var overHotspot = false;
var offset = prop['chart.tooltips.hotspot']; // This is how far the hotspot extends
for (var i=0,len=this.coords.length; i<len; ++i) {
var x = this.coords[i][0];
var y = this.coords[i][1];
var tooltip = this.coords[i][3];
if (
mouseX < (x + offset) &&
mouseX > (x - offset) &&
mouseY < (y + offset) &&
mouseY > (y - offset)
) {
var tooltip = RG.parseTooltipText(prop['chart.tooltips'], i);
return {0:this,1:x,2:y,3:i,'object':this, 'x':x, 'y':y, 'index':i, 'tooltip': tooltip};
}
}
};
/**
* This function facilitates the installation of tooltip event listeners if
* tooltips are defined.
*/
this.allowTooltips =
this.AllowTooltips = function ()
{
// Preload any tooltip images that are used in the tooltips
RG.PreLoadTooltipImages(this);
/**
* This installs the window mousedown event listener that lears any
* highlight that may be visible.
*/
RG.InstallWindowMousedownTooltipListener(this);
/**
* This installs the canvas mousemove event listener. This function
* controls the pointer shape.
*/
RG.InstallCanvasMousemoveTooltipListener(this);
/**
* This installs the canvas mouseup event listener. This is the
* function that actually shows the appropriate tooltip (if any).
*/
RG.InstallCanvasMouseupTooltipListener(this);
};
/**
* Each object type has its own Highlight() function which highlights the appropriate shape
*
* @param object shape The shape to highlight
*/
this.highlight =
this.Highlight = function (shape)
{
if (typeof prop['chart.highlight.style'] === 'function') {
(prop['chart.highlight.style'])(shape);
} else {
RG.Highlight.Point(this, shape);
}
};
/**
* The getObjectByXY() worker method. Don't call this call:
*
* RGraph.ObjectRegistry.getObjectByXY(e)
*
* @param object e The event object
*/
this.getObjectByXY = function (e)
{
var mouseXY = RG.getMouseXY(e);
var mouseX = mouseXY[0];
var mouseY = mouseXY[1];
var centerx = this.centerx;
var centery = this.centery;
var radius = this.radius;
if (
mouseX > (centerx - radius)
&& mouseX < (centerx + radius)
&& mouseY > (centery - radius)
&& mouseY < (centery + radius)
) {
return this;
}
};
/**
* This function positions a tooltip when it is displayed
*
* @param obj object The chart object
* @param int x The X coordinate specified for the tooltip
* @param int y The Y coordinate specified for the tooltip
* @param objec tooltip The tooltips DIV element
*
this.positionTooltip = function (obj, x, y, tooltip, idx)
{
var coordX = obj.coords[tooltip.__index__][0];
var coordY = obj.coords[tooltip.__index__][1];
var canvasXY = RG.getCanvasXY(obj.canvas);
var mouseXY = RG.getMouseXY(window.event);
var gutterLeft = obj.gutterLeft;
var gutterTop = obj.gutterTop;
var width = tooltip.offsetWidth;
var height = tooltip.offsetHeight;
// Set the top position
tooltip.style.left = 0;
tooltip.style.top = window.event.pageY - height - 5 + 'px';
// By default any overflow is hidden
tooltip.style.overflow = '';
// Reposition the tooltip if at the edges:
// LEFT edge
if (canvasXY[0] + mouseXY[0] - (width / 2) < 0) {
tooltip.style.left = canvasXY[0] + mouseXY[0] - (width * 0.1) + 'px';
// RIGHT edge
} else if (canvasXY[0] + mouseXY[0] + (width / 2) > doc.body.offsetWidth) {
tooltip.style.left = canvasXY[0] + mouseXY[0] - (width * 0.9) + 'px';
// Default positioning - CENTERED
} else {
tooltip.style.left = canvasXY[0] + mouseXY[0] - (width / 2) + 'px';
}
};*/
/**
* This function returns the radius (ie the distance from the center) for a particular
* value.
*
* @param number value The value you want the radius for
*/
this.getRadius = function (value)
{
var max = this.max;
if (value < 0 || value > max) {
return null;
}
var r = (value / max) * this.radius;
return r;
};
/**
* This allows for easy specification of gradients
*/
this.parseColors = function ()
{
// Save the original colors so that they can be restored when the canvas is reset
if (this.original_colors.length === 0) {
this.original_colors['data'] = RG.array_clone(this.data);
this.original_colors['chart.highlight.stroke'] = RG.arrayClone(prop['chart.highlight.stroke']);
this.original_colors['chart.highlight.fill'] = RG.arrayClone(prop['chart.highlight.fill']);
this.original_colors['chart.colors.default'] = RG.arrayClone(prop['chart.colors.default']);
this.original_colors['chart.background.grid.color'] = RG.arrayClone(prop['chart.background.grid.color']);
this.original_colors['chart.background.color'] = RG.arrayClone(prop['chart.background.color']);
this.original_colors['chart.segment.highlight.stroke'] = RG.arrayClone(prop['chart.segment.highlight.stroke']);
this.original_colors['chart.segment.highlight.fill'] = RG.arrayClone(prop['chart.segment.highlight.fill']);
}
// Go through the data
for (var i=0; i<this.data.length; i+=1) {
for (var j=0,len=this.data[i].length; j<len; j+=1) {
this.data[i][j][2] = this.parseSingleColorForGradient(this.data[i][j][2]);
}
}
prop['chart.highlight.stroke'] = this.parseSingleColorForGradient(prop['chart.highlight.stroke']);
prop['chart.highlight.fill'] = this.parseSingleColorForGradient(prop['chart.highlight.fill']);
prop['chart.colors.default'] = this.parseSingleColorForGradient(prop['chart.colors.default']);
prop['chart.background.grid.color'] = this.parseSingleColorForGradient(prop['chart.background.grid.color']);
prop['chart.background.color'] = this.parseSingleColorForGradient(prop['chart.background.color']);
prop['chart.segment.highlight.stroke'] = this.parseSingleColorForGradient(prop['chart.segment.highlight.stroke']);
prop['chart.segment.highlight.fill'] = this.parseSingleColorForGradient(prop['chart.segment.highlight.fill']);
};
/**
* Use this function to reset the object to the post-constructor state. Eg reset colors if
* need be etc
*/
this.reset = function ()
{
};
/**
* This parses a single color value
*/
this.parseSingleColorForGradient = function (color)
{
if (!color || typeof color != 'string') {
return color;
}
if (color.match(/^gradient\((.*)\)$/i)) {
var parts = RegExp.$1.split(':');
// Create the gradient
var grad = co.createRadialGradient(this.centerx, this.centery, 0, this.centerx, this.centery, this.radius);
var diff = 1 / (parts.length - 1);
grad.addColorStop(0, RG.trim(parts[0]));
for (var j=1; j<parts.length; ++j) {
grad.addColorStop(j * diff, RG.trim(parts[j]));
}
}
return grad ? grad : color;
};
/**
* This function handles highlighting an entire data-series for the interactive
* key
*
* @param int index The index of the data series to be highlighted
*/
this.interactiveKeyHighlight = function (index)
{
if (this.coords2 && this.coords2[index] && this.coords2[index].length) {
this.coords2[index].forEach(function (value, idx, arr)
{
co.beginPath();
co.fillStyle = prop['chart.key.interactive.highlight.chart.fill'];
co.arc(value[0], value[1], prop['chart.ticksize'] + 2, 0, RG.TWOPI, false);
co.fill();
});
}
};
/**
* Using a function to add events makes it easier to facilitate method chaining
*
* @param string type The type of even to add
* @param function func
*/
this.on = function (type, func)
{
if (type.substr(0,2) !== 'on') {
type = 'on' + type;
}
if (typeof this[type] !== 'function') {
this[type] = func;
} else {
RG.addCustomEventListener(this, type, func);
}
return this;
};
/**
* This helps the Gantt reset colors when the reset function is called.
* It handles going through the data and resetting the colors.
*/
this.resetColorsToOriginalValues = function ()
{
/**
* Copy the original colors over for single-event-per-line data
*/
for (var i=0,len=this.original_colors['data'].length; i<len; ++i) {
for (var j=0,len2=this.original_colors['data'][i].length; j<len2;++j) {
this.data[i][j][2] = RG.array_clone(this.original_colors['data'][i][j][2]);
}
}
};
/**
* This function runs once only
* (put at the end of the file (before any effects))
*/
this.firstDrawFunc = function ()
{
};
RG.att(ca);
/**
* Register the object
*/
RG.Register(this);
/**
* This is the 'end' of the constructor so if the first argument
* contains configuration data - handle that.
*/
if (parseConfObjectForOptions) {
RG.parseObjectStyleConfig(this, conf.options);
}
};