// version: 2015-12-16
/**
* o--------------------------------------------------------------------------------o
* | This file is part of the RGraph package - you can learn more at: |
* | |
* | http://www.rgraph.net |
* | |
* | RGraph is dual licensed under the Open Source GPL (General Public License) |
* | v2.0 license and a commercial license which means that you're not bound by |
* | the terms of the GPL. The commercial license is just £99 (GBP) and you can |
* | read about it here: |
* | http://www.rgraph.net/license |
* o--------------------------------------------------------------------------------o
*/
RGraph = window.RGraph || {isRGraph: true};
/**
* The line chart constructor
*
* @param object canvas The canvas ID
* @param array data The chart data
* @param array ... Other lines to plot
*/
RGraph.Gauge = function (conf)
{
/**
* Allow for object config style
*/
if ( typeof conf === 'object'
&& typeof conf.min === 'number'
&& typeof conf.max === 'number'
&& typeof conf.id === 'string') {
var id = conf.id
var canvas = document.getElementById(id);
var min = conf.min;
var max = conf.max;
var value = conf.value;
var parseConfObjectForOptions = true; // Set this so the config is parsed (at the end of the constructor)
} else {
var id = conf;
var canvas = document.getElementById(id);
var min = arguments[1];
var max = arguments[2];
var value = arguments[3];
}
// id, min, max, value
this.id = id;
this.canvas = canvas;
this.context = this.canvas.getContext ? this.canvas.getContext("2d", {alpha: (typeof id === 'object' && id.alpha === false) ? false : true}) : null;
this.canvas.__object__ = this;
this.type = 'gauge';
this.min = min;
this.max = max;
this.value = RGraph.stringsToNumbers(value);
this.isRGraph = true;
this.currentValue = null;
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
/**
* Range checking
*/
if (typeof(this.value) == 'object') {
for (var i=0; i<this.value.length; ++i) {
if (this.value[i] > this.max) this.value[i] = max;
if (this.value[i] < this.min) this.value[i] = min;
}
} else {
if (this.value > this.max) this.value = max;
if (this.value < this.min) this.value = min;
}
/**
* Compatibility with older browsers
*/
//RGraph.OldBrowserCompat(this.context);
// Various config type stuff
this.properties =
{
'chart.angles.start': null,
'chart.angles.end': null,
'chart.centerx': null,
'chart.centery': null,
'chart.radius': null,
'chart.gutter.left': 15,
'chart.gutter.right': 15,
'chart.gutter.top': 15,
'chart.gutter.bottom': 15,
'chart.border.width': 10,
'chart.title.top': '',
'chart.title.top.font':'Arial',
'chart.title.top.size':14,
'chart.title.top.color':'white',
'chart.title.top.bold':false,
'chart.title.top.pos': null,
'chart.title.bottom': '',
'chart.title.bottom.font':'Arial',
'chart.title.bottom.size':14,
'chart.title.bottom.color':'white',
'chart.title.bottom.bold':false,
'chart.title.bottom.pos':null,
'chart.text.font': 'Arial',
'chart.text.color': 'white',
'chart.text.size': 12,
'chart.background.color': 'black',
'chart.background.gradient': false,
'chart.scale.decimals': 1,
'chart.scale.point': '.',
'chart.scale.thousand': ',',
'chart.units.pre': '',
'chart.units.post': '',
'chart.value.text': true,
'chart.value.text.y.pos': 0.75,
'chart.value.text.units.pre': null,
'chart.value.text.units.post': null,
'chart.value.text.color': 'white',
'chart.value.text.bounding': true,
'chart.value.text.bounding.fill': 'black',
'chart.value.text.bounding.stroke': 'black',
'chart.red.start': 0.70 * this.max,
'chart.red.color': '#DC3912',
'chart.yellow.color': '#FF9900',
'chart.green.end': 0.30 * this.max,
'chart.green.color': '#00FF00',
'chart.colors.ranges': null,
'chart.needle.size': null,
'chart.needle.tail': false,
'chart.needle.colors': ['red', 'green', 'yellow'],
'chart.needle.type': 'triangle',
'chart.border.outer': 'black',
'chart.border.inner': '#f1f1f1',
'chart.border.outline': 'black',
'chart.centerpin.color': 'gray',
'chart.centerpin.radius': null,
'chart.zoom.background': true,
'chart.zoom.action': 'zoom',
'chart.tickmarks.small': 25,
'chart.tickmarks.small.color': 'black',
'chart.tickmarks.medium': 0,
'chart.tickmarks.medium.color': 'black',
'chart.tickmarks.big': 5,
'chart.tickmarks.big.color': 'black',
'chart.labels.count': 5,
'chart.labels.centered': false,
'chart.labels.offset': 0,
'chart.border.gradient': false,
'chart.adjustable': false,
'chart.shadow': true,
'chart.shadow.color': 'black',
'chart.shadow.offsetx': 0,
'chart.shadow.offsety': 0,
'chart.shadow.blur': 15
}
/*
* 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,
pa = RG.Path,
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);
}
/**
* An all encompassing accessor
*
* @param string name The name of the property
* @param mixed value The value of the property
*/
this.set =
this.Set = function (name)
{
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 propertyy name with "chart." if necessary
*/
if (name.substr(0,6) != 'chart.') {
name = 'chart.' + name;
}
// Convert uppercase letters to dot+lower case letter
name = name.replace(/([A-Z])/g, function (str)
{
return '.' + String(RegExp.$1).toLowerCase();
});
/**
* Title compatibility
*/
if (name == 'chart.title') name = 'chart.title.top';
if (name == 'chart.title.font') name = 'chart.title.top.font';
if (name == 'chart.title.size') name = 'chart.title.top.size';
if (name == 'chart.title.color') name = 'chart.title.top.color';
if (name == 'chart.title.bold') name = 'chart.title.top.bold';
// BC
if (name == 'chart.needle.color') {
name = 'chart.needle.colors';
}
prop[name] = value;
return this;
};
/**
* An all encompassing accessor
*
* @param string name The name of the property
*/
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
name = name.replace(/([A-Z])/g, function (str)
{
return '.' + String(RegExp.$1).toLowerCase()
});
// BC
if (name == 'chart.needle.color') {
name = 'chart.needle.colors';
}
return prop[name];
};
/**
* The function you call to draw the line chart
*
* @param bool An optional bool used internally to ditinguish whether the
* line chart is being called by the bar chart
*/
this.draw =
this.Draw = function ()
{
/**
* Fire the onbeforedraw event
*/
RG.FireCustomEvent(this, 'onbeforedraw');
/**
* Store the value (for animation primarily
*/
this.currentValue = this.value;
/**
* This is new in May 2011 and facilitates indiviual gutter settings,
* eg chart.gutter.left
*/
this.gutterLeft = prop['chart.gutter.left'];
this.gutterRight = prop['chart.gutter.right'];
this.gutterTop = prop['chart.gutter.top'];
this.gutterBottom = prop['chart.gutter.bottom'];
this.centerx = ((ca.width - this.gutterLeft - this.gutterRight) / 2) + this.gutterLeft;
this.centery = ((ca.height - this.gutterTop - this.gutterBottom) / 2) + this.gutterTop;
this.radius = Math.min(
((ca.width - this.gutterLeft - this.gutterRight) / 2),
((ca.height - this.gutterTop - this.gutterBottom) / 2)
);
this.startAngle = prop['chart.angles.start'] ? prop['chart.angles.start'] : (RG.HALFPI / 3) + RG.HALFPI;
this.endAngle = prop['chart.angles.end'] ? prop['chart.angles.end'] : RG.TWOPI + RG.HALFPI - (RG.HALFPI / 3);
/**
* Reset this so it doesn't keep growing
*/
this.coordsText = [];
/**
* You can now override the positioning and radius if you so wish.
*/
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. This allows for simple gradient syntax
*/
if (!this.colorsParsed) {
this.parseColors();
// Don't want to do this again
this.colorsParsed = true;
}
// This has to be in the constructor
this.centerpinRadius = 0.16 * this.radius;
if (typeof(prop['chart.centerpin.radius']) == 'number') {
this.centerpinRadius = prop['chart.centerpin.radius'];
}
/**
* Setup the context menu if required
*/
if (prop['chart.contextmenu']) {
RG.ShowContext(this);
}
// DRAW THE CHART HERE
this.DrawBackGround();
this.DrawGradient();
this.DrawColorBands();
this.DrawSmallTickmarks();
this.DrawMediumTickmarks();
this.DrawBigTickmarks();
this.DrawLabels();
this.DrawTopTitle();
this.DrawBottomTitle();
if (typeof(this.value) == 'object') {
for (var i=0; i<this.value.length; ++i) {
this.DrawNeedle(this.value[i], prop['chart.needle.colors'][i], i);
}
} else {
this.DrawNeedle(this.value, prop['chart.needle.colors'][0], 0);
}
this.DrawCenterpin();
/**
* This function enables resizing
*/
if (prop['chart.resizable']) {
RG.AllowResizing(this);
}
/**
* This installs the event listeners
*/
RG.InstallEventListeners(this);
/**
* Fire the onfirstdraw event
*/
if (this.firstDraw) {
RG.fireCustomEvent(this, 'onfirstdraw');
this.firstDraw = false;
this.firstDrawFunc();
}
/**
* Fire the RGraph ondraw event
*/
RG.FireCustomEvent(this, 'ondraw');
return this;
};
/**
* Used in chaining. Runs a function there and then - not waiting for
* the events to fire (eg the onbeforedraw event)
*
* @param function func The function to execute
*/
this.exec = function (func)
{
func(this);
return this;
};
/**
* Draw the background
*/
this.drawBackGround =
this.DrawBackGround = function ()
{
// Shadow //////////////////////////////////////////////
if (prop['chart.shadow']) {
RG.SetShadow(this, prop['chart.shadow.color'], prop['chart.shadow.offsetx'], prop['chart.shadow.offsety'], prop['chart.shadow.blur']);
}
co.beginPath();
co.fillStyle = prop['chart.background.color'];
//co.moveTo(this.centerx, this.centery)
co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, 0);
co.fill();
// Turn off the shadow
RG.NoShadow(this);
// Shadow //////////////////////////////////////////////
var grad = co.createRadialGradient(this.centerx + 50, this.centery - 50, 0, this.centerx + 50, this.centery - 50, 150);
grad.addColorStop(0, '#eee');
grad.addColorStop(1, 'white');
var borderWidth = prop['chart.border.width'];
co.beginPath();
co.fillStyle = prop['chart.background.color'];
co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, 0);
co.fill();
/**
* Draw the gray circle
*/
co.beginPath();
co.fillStyle = prop['chart.border.outer'];
co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, 0);
co.fill();
/**
* Draw the light gray inner border
*/
co.beginPath();
co.fillStyle = prop['chart.border.inner'];
co.arc(this.centerx, this.centery, this.radius - borderWidth, 0, RG.TWOPI, 0);
co.fill();
// Draw the white circle inner border
co.beginPath();
co.fillStyle = prop['chart.background.color'];
co.arc(this.centerx, this.centery, this.radius - borderWidth - 4, 0, RG.TWOPI, 0);
co.fill();
// Draw the circle background. Can be any colour now.
co.beginPath();
co.fillStyle = prop['chart.background.color'];
co.arc(this.centerx, this.centery, this.radius - borderWidth - 4, 0, RG.TWOPI, 0);
co.fill();
if (prop['chart.background.gradient']) {
// Draw a partially transparent gradient that sits on top of the background
co.beginPath();
co.fillStyle = RG.RadialGradient(this,
this.centerx,
this.centery,
0,
this.centerx,
this.centery,
this.radius,
'rgba(255,255,255,0.6)',
'rgba(255,255,255,0.1)');
co.arc(this.centerx, this.centery, this.radius - borderWidth - 4, 0, RG.TWOPI, 0);
co.fill();
}
// Draw a black border around the chart
co.beginPath();
co.strokeStyle = prop['chart.border.outline'];
co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, 0);
co.stroke();
};
/**
* This function draws the smaller tickmarks
*/
this.drawSmallTickmarks =
this.DrawSmallTickmarks = function ()
{
var numTicks = prop['chart.tickmarks.small'];
co.lineWidth = 1;
for (var i=0; i<=numTicks; ++i) {
co.beginPath();
co.strokeStyle = prop['chart.tickmarks.small.color'];
var a = (((this.endAngle - this.startAngle) / numTicks) * i) + this.startAngle;
co.arc(this.centerx, this.centery, this.radius - prop['chart.border.width'] - 10, a, a + 0.00001, 0);
co.arc(this.centerx, this.centery, this.radius - prop['chart.border.width'] - 10 - 5, a, a + 0.00001, 0);
co.stroke();
}
};
/**
* This function draws the medium sized tickmarks
*/
this.drawMediumTickmarks =
this.DrawMediumTickmarks = function ()
{
if (prop['chart.tickmarks.medium']) {
var numTicks = prop['chart.tickmarks.medium'];
co.lineWidth = 3;
co.lineCap = 'round';
co.strokeStyle = prop['chart.tickmarks.medium.color'];
for (var i=0; i<=numTicks; ++i) {
co.beginPath();
var a = (((this.endAngle - this.startAngle) / numTicks) * i) + this.startAngle + (((this.endAngle - this.startAngle) / (2 * numTicks)));
if (a > this.startAngle && a< this.endAngle) {
co.arc(this.centerx, this.centery, this.radius - prop['chart.border.width'] - 10, a, a + 0.00001, 0);
co.arc(this.centerx, this.centery, this.radius - prop['chart.border.width'] - 10 - 6, a, a + 0.00001, 0);
}
co.stroke();
}
}
};
/**
* This function draws the large, bold tickmarks
*/
this.drawBigTickmarks =
this.DrawBigTickmarks = function ()
{
var numTicks = prop['chart.tickmarks.big'];
co.lineWidth = 3;
co.lineCap = 'round';
for (var i=0; i<=numTicks; ++i) {
co.beginPath();
co.strokeStyle = prop['chart.tickmarks.big.color'];
var a = (((this.endAngle - this.startAngle) / numTicks) * i) + this.startAngle;
co.arc(this.centerx, this.centery, this.radius - prop['chart.border.width'] - 10, a, a + 0.00001, 0);
co.arc(this.centerx, this.centery, this.radius - prop['chart.border.width'] - 10 - 10, a, a + 0.00001, 0);
co.stroke();
}
};
/**
* This function draws the centerpin
*/
this.drawCenterpin =
this.DrawCenterpin = function ()
{
var offset = 6;
var grad = co.createRadialGradient(this.centerx + offset, this.centery - offset, 0, this.centerx + offset, this.centery - offset, 25);
grad.addColorStop(0, '#ddf');
grad.addColorStop(1, prop['chart.centerpin.color']);
co.beginPath();
co.fillStyle = grad;
co.arc(this.centerx, this.centery, this.centerpinRadius, 0, RG.TWOPI, 0);
co.fill();
};
/**
* This function draws the labels
*/
this.drawLabels =
this.DrawLabels = function ()
{
co.fillStyle = prop['chart.text.color'];
var font = prop['chart.text.font'];
var size = prop['chart.text.size'];
var num = prop['chart.labels.specific'] ? (prop['chart.labels.specific'].length - 1) : prop['chart.labels.count'];
co.beginPath();
for (var i=0; i<=num; ++i) {
var hyp = (this.radius - 25 - prop['chart.border.width']) - prop['chart.labels.offset'];
var a = (this.endAngle - this.startAngle) / num
a = this.startAngle + (i * a);
a -= RG.HALFPI;
var x = this.centerx - (Math.sin(a) * hyp);
var y = this.centery + (Math.cos(a) * hyp);
var hAlign = x > this.centerx ? 'right' : 'left';
var vAlign = y > this.centery ? 'bottom' : 'top';
// This handles the label alignment when the label is on a PI/HALFPI boundary
if (a == RG.HALFPI) {
vAlign = 'center';
} else if (a == RG.PI) {
hAlign = 'center';
} else if (a == (RG.HALFPI + RG.PI) ) {
vAlign = 'center';
}
/**
* Can now force center alignment
*/
if (prop['chart.labels.centered']) {
hAlign = 'center';
vAlign = 'center';
}
RG.Text2(this, {'font':font,
'size':size,
'x':x,
'y':y,
'text':prop['chart.labels.specific'] ? prop['chart.labels.specific'][i] : RG.number_format(this, (((this.max - this.min) * (i / num)) + this.min).toFixed(prop['chart.scale.decimals']), prop['chart.units.pre'], prop['chart.units.post']),
'halign':hAlign,
'valign':vAlign,
'tag': prop['chart.labels.specific'] ? 'labels.specific' : 'labels'
});
}
co.fill();
/**
* Draw the textual value if requested
*/
if (prop['chart.value.text']) {
var x = this.centerx;
var y = this.centery + (prop['chart.value.text.y.pos'] * this.radius);
var units_pre = typeof(prop['chart.value.text.units.pre']) == 'string' ? prop['chart.value.text.units.pre'] : prop['chart.units.pre'];
var units_post = typeof(prop['chart.value.text.units.post']) == 'string' ? prop['chart.value.text.units.post'] : prop['chart.units.post'];
var color = prop['chart.value.text.color'];
var bounding = prop['chart.value.text.bounding'];
var boundingFill = prop['chart.value.text.bounding.fill'];
var boundingStroke = prop['chart.value.text.bounding.stroke'];
co.fillStyle = color;
RG.text2(this, {
'font':font,
'size':size + 2,
'x':x,
'y':y,
'text':RG.number_format(this, this.value.toFixed(prop['chart.scale.decimals']), units_pre, units_post),
'halign':'center',
'valign':'center',
'bounding':bounding,
'bounding.fill':boundingFill,
'bounding.stroke': boundingStroke,
'tag': 'value.text'
});
}
};
/**
* This function draws the top title
*/
this.drawTopTitle =
this.DrawTopTitle = function ()
{
var x = this.centerx;
var y = this.centery - 25;
// Totally override the calculated positioning
if (typeof(prop['chart.title.top.pos']) == 'number') {
y = this.centery - (this.radius * prop['chart.title.top.pos']);
}
if (prop['chart.title.top']) {
co.fillStyle = prop['chart.title.top.color'];
RG.Text2(this, {'font':prop['chart.title.top.font'],
'size':prop['chart.title.top.size'],
'x':x,
'y':y,
'text':String(prop['chart.title.top']),
'halign':'center',
'valign':'bottom',
'bold':prop['chart.title.top.bold'],
'tag': 'title.top'
});
}
};
/**
* This function draws the bottom title
*/
this.drawBottomTitle =
this.DrawBottomTitle = function ()
{
var x = this.centerx;
var y = this.centery + this.centerpinRadius + 10;
// Totally override the calculated positioning
if (typeof(prop['chart.title.bottom.pos']) == 'number') {
y = this.centery + (this.radius * prop['chart.title.bottom.pos']);
}
if (prop['chart.title.bottom']) {
co.fillStyle = prop['chart.title.bottom.color'];
RG.Text2(this, {'font':prop['chart.title.bottom.font'],
'size':prop['chart.title.bottom.size'],
'x':x,
'y':y,
'text':String(prop['chart.title.bottom']),
'halign':'center',
'valign':'top',
'bold':prop['chart.title.bottom.bold'],
'tag': 'title.bottom'
});
}
};
/**
* This function draws the Needle
*
* @param number value The value to draw the needle for
*/
this.drawNeedle =
this.DrawNeedle = function (value, color, index)
{
var type = prop['chart.needle.type'];
co.lineWidth = 0.5;
co.strokeStyle = 'gray';
co.fillStyle = color;
var angle = (this.endAngle - this.startAngle) * ((value - this.min) / (this.max - this.min));
angle += this.startAngle;
// Work out the size of the needle
if ( typeof(prop['chart.needle.size']) == 'object'
&& prop['chart.needle.size']
&& typeof(prop['chart.needle.size'][index]) == 'number') {
var size = prop['chart.needle.size'][index];
} else if (typeof(prop['chart.needle.size']) == 'number') {
var size = prop['chart.needle.size'];
} else {
var size = this.radius - 25 - prop['chart.border.width'];
}
if (type == 'line') {
co.beginPath();
co.lineWidth = 7;
co.strokeStyle = color;
co.arc(this.centerx,
this.centery,
size,
angle,
angle + 0.0001,
false);
co.lineTo(this.centerx, this.centery);
if (prop['chart.needle.tail']) {
co.arc(this.centerx, this.centery, this.radius * 0.2 , angle + RG.PI, angle + 0.00001 + RG.PI, false);
}
co.lineTo(this.centerx, this.centery);
co.stroke();
//co.fill();
} else {
co.beginPath();
co.arc(this.centerx, this.centery, size, angle, angle + 0.00001, false);
co.arc(this.centerx, this.centery, this.centerpinRadius * 0.5, angle + RG.HALFPI, angle + 0.00001 + RG.HALFPI, false);
if (prop['chart.needle.tail']) {
co.arc(this.centerx, this.centery, this.radius * 0.2 , angle + RG.PI, angle + 0.00001 + RG.PI, false);
}
co.arc(this.centerx, this.centery, this.centerpinRadius * 0.5, angle - RG.HALFPI, angle - 0.00001 - RG.HALFPI, false);
co.stroke();
co.fill();
/**
* Store the angle in an object variable
*/
this.angle = angle;
}
};
/**
* This draws the green background to the tickmarks
*/
this.drawColorBands =
this.DrawColorBands = function ()
{
if (RG.is_array(prop['chart.colors.ranges'])) {
var ranges = prop['chart.colors.ranges'];
for (var i=0; i<ranges.length; ++i) {
//co.strokeStyle = prop['chart.strokestyle'] ? prop['chart.strokestyle'] : ranges[i][2];
co.fillStyle = ranges[i][2];
co.lineWidth = 0;//prop['chart.linewidth.segments'];
co.beginPath();
co.arc(this.centerx,
this.centery,
this.radius - 10 - prop['chart.border.width'],
(((ranges[i][0] - this.min) / (this.max - this.min)) * (this.endAngle - this.startAngle)) + this.startAngle,
(((ranges[i][1] - this.min) / (this.max - this.min)) * (this.endAngle - this.startAngle)) + this.startAngle,
false);
co.arc(this.centerx,
this.centery,
this.radius - 20 - prop['chart.border.width'],
(((ranges[i][1] - this.min) / (this.max - this.min)) * (this.endAngle - this.startAngle)) + this.startAngle,
(((ranges[i][0] - this.min) / (this.max - this.min)) * (this.endAngle - this.startAngle)) + this.startAngle,
true);
co.closePath();
co.fill();
}
return;
}
/**
* Draw the GREEN region
*/
co.strokeStyle = prop['chart.green.color'];
co.fillStyle = prop['chart.green.color'];
var greenStart = this.startAngle;
var greenEnd = this.startAngle + (this.endAngle - this.startAngle) * ((prop['chart.green.end'] - this.min) / (this.max - this.min))
co.beginPath();
co.arc(this.centerx, this.centery, this.radius - 10 - prop['chart.border.width'], greenStart, greenEnd, false);
co.arc(this.centerx, this.centery, this.radius - 20 - prop['chart.border.width'], greenEnd, greenStart, true);
co.fill();
/**
* Draw the YELLOW region
*/
co.strokeStyle = prop['chart.yellow.color'];
co.fillStyle = prop['chart.yellow.color'];
var yellowStart = greenEnd;
var yellowEnd = this.startAngle + (this.endAngle - this.startAngle) * ((prop['chart.red.start'] - this.min) / (this.max - this.min))
co.beginPath();
co.arc(this.centerx, this.centery, this.radius - 10 - prop['chart.border.width'], yellowStart, yellowEnd, false);
co.arc(this.centerx, this.centery, this.radius - 20 - prop['chart.border.width'], yellowEnd, yellowStart, true);
co.fill();
/**
* Draw the RED region
*/
co.strokeStyle = prop['chart.red.color'];
co.fillStyle = prop['chart.red.color'];
var redStart = yellowEnd;
var redEnd = this.startAngle + (this.endAngle - this.startAngle) * ((this.max - this.min) / (this.max - this.min))
co.beginPath();
co.arc(this.centerx, this.centery, this.radius - 10 - prop['chart.border.width'], redStart, redEnd, false);
co.arc(this.centerx, this.centery, this.radius - 20 - prop['chart.border.width'], redEnd, redStart, true);
co.fill();
};
/**
* A placeholder function
*
* @param object The event object
*/
this.getShape = function (e) {};
/**
* A getValue method
*
* @param object e An event object
*/
this.getValue = function (e)
{
var mouseXY = RG.getMouseXY(e);
var mouseX = mouseXY[0];
var mouseY = mouseXY[1];
var angle = RG.getAngleByXY(this.centerx, this.centery, mouseX, mouseY);
if (angle >= 0 && angle <= RG.HALFPI) {
angle += RG.TWOPI;
}
var value = ((angle - this.startAngle) / (this.endAngle - this.startAngle)) * (this.max - this.min);
value = value + this.min;
if (value < this.min) {
value = this.min
}
if (value > this.max) {
value = this.max
}
return value;
};
/**
* 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 = RGraph.getMouseXY(e);
if (
mouseXY[0] > (this.centerx - this.radius)
&& mouseXY[0] < (this.centerx + this.radius)
&& mouseXY[1] > (this.centery - this.radius)
&& mouseXY[1] < (this.centery + this.radius)
&& RG.getHypLength(this.centerx, this.centery, mouseXY[0], mouseXY[1]) <= this.radius
) {
return this;
}
};
/**
* This draws the gradient that goes around the Gauge chart
*/
this.drawGradient =
this.DrawGradient = function ()
{
if (prop['chart.border.gradient']) {
co.beginPath();
var grad = co.createRadialGradient(this.centerx, this.centery, this.radius, this.centerx, this.centery, this.radius - 15);
grad.addColorStop(0, 'gray');
grad.addColorStop(1, 'white');
co.fillStyle = grad;
co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, false)
co.arc(this.centerx, this.centery, this.radius - 15, RG.TWOPI,0, true)
co.fill();
}
};
/**
* This method handles the adjusting calculation for when the mouse is moved
*
* @param object e The event object
*/
this.adjusting_mousemove =
this.Adjusting_mousemove = function (e)
{
/**
* Handle adjusting for the Bar
*/
if (prop['chart.adjustable'] && RG.Registry.Get('chart.adjusting') && RG.Registry.Get('chart.adjusting').uid == this.uid) {
this.value = this.getValue(e);
//RG.Clear(this.canvas);
RG.redrawCanvas(this.canvas);
RG.fireCustomEvent(this, 'onadjust');
}
};
/**
* This method returns an appropriate angle for the given value (in RADIANS)
*
* @param number value The value to get the angle for
*/
this.getAngle = function (value)
{
// Higher than max
if (value > this.max || value < this.min) {
return null;
}
//var value = ((angle - this.startAngle) / (this.endAngle - this.startAngle)) * (this.max - this.min);
//value = value + this.min;
var angle = (((value - this.min) / (this.max - this.min)) * (this.endAngle - this.startAngle)) + this.startAngle;
return angle;
};
/**
* This allows for easy specification of gradients. Could optimise this not to repeatedly call parseSingleColors()
*/
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['chart.background.color'] = RG.array_clone(prop['chart.background.color']);
this.original_colors['chart.red.color'] = RG.array_clone(prop['chart.red.color']);
this.original_colors['chart.yellow.color'] = RG.array_clone(prop['chart.yellow.color']);
this.original_colors['chart.green.color'] = RG.array_clone(prop['chart.green.color']);
this.original_colors['chart.border.inner'] = RG.array_clone(prop['chart.border.inner']);
this.original_colors['chart.border.outer'] = RG.array_clone(prop['chart.border.outer']);
this.original_colors['chart.colors.ranges'] = RG.array_clone(prop['chart.colors.ranges']);
this.original_colors['chart.needle.colors'] = RG.array_clone(prop['chart.needle.colors']);
}
prop['chart.background.color'] = this.parseSingleColorForGradient(prop['chart.background.color']);
prop['chart.red.color'] = this.parseSingleColorForGradient(prop['chart.red.color']);
prop['chart.yellow.color'] = this.parseSingleColorForGradient(prop['chart.yellow.color']);
prop['chart.green.color'] = this.parseSingleColorForGradient(prop['chart.green.color']);
prop['chart.border.inner'] = this.parseSingleColorForGradient(prop['chart.border.inner']);
prop['chart.border.outer'] = this.parseSingleColorForGradient(prop['chart.border.outer']);
// Parse the chart.color.ranges value
if (prop['chart.colors.ranges']) {
var ranges = prop['chart.colors.ranges'];
for (var i=0; i<ranges.length; ++i) {
ranges[i][2] = this.parseSingleColorForGradient(ranges[i][2], this.radius - 30);
}
}
// Parse the chart.needle.colors value
if (prop['chart.needle.colors']) {
var colors = prop['chart.needle.colors'];
for (var i=0; i<colors.length; ++i) {
colors[i] = this.parseSingleColorForGradient(colors[i]);
}
}
};
/**
* 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
*
* @param string color The color to look for a gradient in
* @param radius OPTIONAL The start radius to start the gradient at.
* If not suppllied the centerx value is used
*/
this.parseSingleColorForGradient = function (color)
{
var radiusStart = arguments[1] || 0;
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,
radiusStart,
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;
};
/**
* 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;
}
this[type] = func;
return this;
};
/**
* This function runs once only
* (put at the end of the file (before any effects))
*/
this.firstDrawFunc = function ()
{
};
/**
* Gauge Grow
*
* This effect gradually increases the represented value
*
* @param object Options for the effect. You can pass frames here
* @param function An optional callback function
*/
this.grow = function ()
{
var obj = this;
var opt = arguments[0] ? arguments[0] : {};
var callback = arguments[1] ? arguments[1] : function () {};
var frames = opt.frames || 30;
var frame = 0;
// Single pointer
if (typeof obj.value === 'number') {
var origValue = Number(obj.currentValue);
if (obj.currentValue == null) {
obj.currentValue = obj.min;
origValue = obj.min;
}
var newValue = obj.value;
var diff = newValue - origValue;
var iterator = function ()
{
obj.value = ((frame / frames) * diff) + origValue;
if (obj.value > obj.max) obj.value = obj.max;
if (obj.value < obj.min) obj.value = obj.min;
//RGraph.clear(obj.canvas);
RG.redrawCanvas(obj.canvas);
if (frame++ < frames) {
RG.Effects.updateCanvas(iterator);
} else {
callback(obj);
}
};
iterator();
/**
* Multiple pointers
*/
} else {
if (obj.currentValue == null) {
obj.currentValue = [];
for (var i=0; i<obj.value.length; ++i) {
obj.currentValue[i] = obj.min;
}
origValue = RG.array_clone(obj.currentValue);
}
var origValue = RG.array_clone(obj.currentValue);
var newValue = RG.array_clone(obj.value);
var diff = [];
for (var i=0,len=newValue.length; i<len; ++i) {
diff[i] = newValue[i] - Number(obj.currentValue[i]);
}
var iterator = function ()
{
frame++;
for (var i=0,len=obj.value.length; i<len; ++i) {
obj.value[i] = ((frame / frames) * diff[i]) + origValue[i];
if (obj.value[i] > obj.max) obj.value[i] = obj.max;
if (obj.value[i] < obj.min) obj.value[i] = obj.min;
}
//RG.clear(obj.canvas);
RG.redrawCanvas(obj.canvas);
if (frame < frames) {
RG.Effects.updateCanvas(iterator);
} else {
callback(obj);
}
};
iterator();
}
return this;
};
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);
}
};