// 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 odometer constructor. Pass it the ID of the canvas tag, the start value of the odo,
* the end value, and the value that the pointer should point to.
*
* @param string id The ID of the canvas tag
* @param int start The start value of the Odo
* @param int end The end value of the odo
* @param int value The indicated value (what the needle points to)
*/
RGraph.Odometer = function (conf)
{
/**
* Allow for object config style
*/
if ( typeof conf === 'object'
&& typeof conf.value !== 'undefined'
&& 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];
}
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 = 'odo';
this.isRGraph = true;
this.min = RGraph.stringsToNumbers(min);
this.max = RGraph.stringsToNumbers(max);
this.value = RGraph.stringsToNumbers(value);
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
/**
* Compatibility with older browsers
*/
//RGraph.OldBrowserCompat(this.context);
this.properties =
{
'chart.background.border': 'black',
'chart.background.color': '#eee',
'chart.background.lines.color': '#ddd',
'chart.centerx': null,
'chart.centery': null,
'chart.radius': null,
'chart.value.text': false,
'chart.value.text.decimals': 0,
'chart.needle.color': 'black',
'chart.needle.width': 2,
'chart.needle.head': true,
'chart.needle.tail': true,
'chart.needle.type': 'pointer',
'chart.needle.extra': [],
'chart.needle.triangle.border': '#aaa',
'chart.text.size': 12,
'chart.text.color': 'black',
'chart.text.font': 'Segoe UI, Arial, Verdana, sans-serif',
'chart.text.accessible': false,
'chart.text.accessible.overflow': 'visible',
'chart.text.accessible.pointerevents': true,
'chart.green.max': max * 0.75,
'chart.red.min': max * 0.9,
'chart.green.color': 'Gradient(white:#0c0)',
'chart.yellow.color': 'Gradient(white:#ff0)',
'chart.red.color': 'Gradient(white:#f00)',
'chart.label.area': 35,
'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.font': null,
'chart.title.bold': true,
'chart.title.x': null,
'chart.title.y': null,
'chart.title.halign': null,
'chart.title.valign': null,
'chart.contextmenu': null,
'chart.linewidth': 1,
'chart.shadow.inner': false,
'chart.shadow.inner.color': 'black',
'chart.shadow.inner.offsetx': 3,
'chart.shadow.inner.offsety': 3,
'chart.shadow.inner.blur': 6,
'chart.shadow.outer': false,
'chart.shadow.outer.color': 'black',
'chart.shadow.outer.offsetx': 3,
'chart.shadow.outer.offsety': 3,
'chart.shadow.outer.blur': 6,
'chart.annotatable': false,
'chart.annotate.color': 'black',
'chart.scale.decimals': 0,
'chart.scale.point': '.',
'chart.scale.thousand': ',',
'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.adjust': [0,0],
'chart.resize.handle.background': null,
'chart.units.pre': '',
'chart.units.post': '',
'chart.border': false,
'chart.border.color1': '#BEBCB0',
'chart.border.color2': '#F0EFEA',
'chart.border.color3': '#BEBCB0',
'chart.tickmarks': true,
'chart.tickmarks.highlighted': false,
'chart.tickmarks.big.color': '#999',
'chart.zerostart': false,
'chart.labels': null,
'chart.units.pre': '',
'chart.units.post': '',
'chart.value.units.pre': '',
'chart.value.units.post': '',
'chart.key': null,
'chart.key.background': 'white',
'chart.key.position': 'graph',
'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.halign': 'right',
'chart.key.color.shape': 'square',
'chart.key.rounded': true,
'chart.key.text.size': 10,
'chart.key.colors': null,
'chart.key.text.color': 'black',
'chart.adjustable': false,
'chart.clearto': 'rgba(0,0,0,0)'
}
/*
* 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 peudo setter
*
* @param name string The name of the property to set
* @param value mixed The value of the property
*/
this.set =
this.Set = function (name, value)
{
var value = arguments[1] || null;
/**
* 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());
}
if (name == 'chart.needle.style') {
alert('[RGRAPH] The RGraph property chart.needle.style has changed to chart.needle.color');
}
if (name == 'chart.needle.thickness') {
name = 'chart.needle.width';
}
if (name == 'chart.value') {
this.value = value;
return;
}
prop[name] = value;
return this;
};
/**
* A getter
*
* @param name string 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());
}
if (name == 'chart.value') {
return this.value;
}
return prop[name.toLowerCase()];
};
/**
* Draws the odometer
*/
this.draw =
this.Draw = function ()
{
/**
* Fire the onbeforedraw event
*/
RG.FireCustomEvent(this, 'onbeforedraw');
/**
* Set the current value
*/
this.currentValue = this.value;
/**
* No longer allow values outside the range of the Odo
*/
if (this.value > this.max) {
this.value = this.max;
}
if (this.value < this.min) {
this.value = this.min;
}
/**
* 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'];
// Work out a few things
this.radius = Math.min(
(ca.width - this.gutterLeft - this.gutterRight) / 2,
(ca.height - this.gutterTop - this.gutterBottom) / 2
)
- (prop['chart.border'] ? 25 : 0);
this.diameter = 2 * this.radius;
this.centerx = ((ca.width - this.gutterLeft- this.gutterRight) / 2) + this.gutterLeft;
this.centery = ((ca.height - this.gutterTop - this.gutterBottom) / 2) + this.gutterTop;
this.range = this.max - this.min;
this.coordsText = [];
/**
* Move the centerx if the key is defined
*/
if (prop['chart.key'] && prop['chart.key'].length > 0 && ca.width > ca.height) this.centerx = 5 + this.radius;
if (typeof(prop['chart.centerx']) == 'number') this.centerx = prop['chart.centerx'];
if (typeof(prop['chart.centery']) == 'number') this.centery = prop['chart.centery'];
/**
* Allow custom setting of the radius
*/
if (typeof(prop['chart.radius']) == 'number') {
this.radius = prop['chart.radius'];
if (prop['chart.border']) {
this.radius -= 25;
}
}
/**
* 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;
}
co.lineWidth = prop['chart.linewidth'];
// Draw the background
this.DrawBackground();
// And lastly, draw the labels
this.DrawLabels();
// Draw the needle
this.DrawNeedle(this.value, prop['chart.needle.color']);
/**
* Draw any extra needles
*/
if (prop['chart.needle.extra'].length > 0) {
for (var i=0; i<prop['chart.needle.extra'].length; ++i) {
var needle = prop['chart.needle.extra'][i];
this.DrawNeedle(needle[0], needle[1], needle[2]);
}
}
/**
* Draw the key if requested
*/
if (prop['chart.key'] && prop['chart.key'].length > 0) {
// Build a colors array out of the needle colors
var colors = [prop['chart.needle.color']];
if (prop['chart.needle.extra'].length > 0) {
for (var i=0; i<prop['chart.needle.extra'].length; ++i) {
var needle = prop['chart.needle.extra'][i];
colors.push(needle[1]);
}
}
RG.DrawKey(this, prop['chart.key'], colors);
}
/**
* Setup the context menu if required
*/
if (prop['chart.contextmenu']) {
RG.ShowContext(this);
}
/**
* 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) {
this.firstDraw = false;
RG.fireCustomEvent(this, 'onfirstdraw');
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;
};
/**
* Draws the background
*/
this.drawBackground =
this.DrawBackground = function ()
{
co.beginPath();
/**
* Turn on the shadow if need be
*/
if (prop['chart.shadow.outer']) {
RG.setShadow(this, prop['chart.shadow.outer.color'], prop['chart.shadow.outer.offsetx'], prop['chart.shadow.outer.offsety'], prop['chart.shadow.outer.blur']);
}
var backgroundColor = prop['chart.background.color'];
// Draw the grey border
co.fillStyle = backgroundColor;
co.arc(this.centerx, this.centery, this.radius, 0.0001, RG.TWOPI, false);
co.fill();
/**
* Turn off the shadow
*/
RG.noShadow(this);
// Draw a circle
co.strokeStyle = '#666';
co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, false);
// Now draw a big white circle to make the lines appear as tick marks
// This is solely for Chrome
co.fillStyle = backgroundColor;
co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, false);
co.fill();
/**
* Draw more tickmarks
*/
if (prop['chart.tickmarks']) {
co.beginPath();
co.strokeStyle = '#bbb';
for (var i=0; i<=360; i+=3) {
co.arc(this.centerx, this.centery, this.radius, 0, i / 57.3, false);
co.lineTo(this.centerx, this.centery);
}
co.stroke();
}
co.beginPath();
co.lineWidth = 1;
co.strokeStyle = 'black';
// Now draw a big white circle to make the lines appear as tick marks
co.fillStyle = backgroundColor;
co.strokeStyle = backgroundColor;
co.arc(this.centerx, this.centery, this.radius - 5, 0, RG.TWOPI, false);
co.fill();
co.stroke();
// Gray lines at 18 degree intervals
co.beginPath();
co.strokeStyle = prop['chart.background.lines.color'];
for (var i=0; i<360; i+=18) {
co.arc(this.centerx, this.centery, this.radius, 0, RG.degrees2Radians(i), false);
co.lineTo(this.centerx, this.centery);
}
co.stroke();
// Redraw the outer circle
co.beginPath();
co.strokeStyle = prop['chart.background.border'];
co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, false);
co.stroke();
/**
* Now draw the center bits shadow if need be
*/
if (prop['chart.shadow.inner']) {
co.beginPath();
RG.SetShadow(this, prop['chart.shadow.inner.color'], prop['chart.shadow.inner.offsetx'], prop['chart.shadow.inner.offsety'], prop['chart.shadow.inner.blur']);
co.arc(this.centerx, this.centery, this.radius - prop['chart.label.area'], 0, RG.TWOPI, 0);
co.fill();
co.stroke();
/**
* Turn off the shadow
*/
RG.NoShadow(this);
}
/*******************************************************
* Draw the green area
*******************************************************/
var greengrad = prop['chart.green.color'];
// Draw the "tick highlight"
if (prop['chart.tickmarks.highlighted']) {
co.beginPath();
co.lineWidth = 5;
co.strokeStyle = greengrad;
co.arc(this.centerx, this.centery, this.radius - 2.5,
-1 * RG.HALFPI,
(((prop['chart.green.max'] - this.min)/ (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
0);
co.stroke();
co.lineWidth = 1;
}
co.beginPath();
co.fillStyle = greengrad;
co.arc(
this.centerx,
this.centery,
this.radius - prop['chart.label.area'],
0 - RG.HALFPI,
(((prop['chart.green.max'] - this.min)/ (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
false
);
co.lineTo(this.centerx, this.centery);
co.closePath();
co.fill();
/*******************************************************
* Draw the yellow area
*******************************************************/
var yellowgrad = prop['chart.yellow.color'];
// Draw the "tick highlight"
if (prop['chart.tickmarks.highlighted']) {
co.beginPath();
co.lineWidth = 5;
co.strokeStyle = yellowgrad;
co.arc(this.centerx, this.centery, this.radius - 2.5, (
((prop['chart.green.max'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
(((prop['chart.red.min'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
0);
co.stroke();
co.lineWidth = 1;
}
co.beginPath();
co.fillStyle = yellowgrad;
co.arc(
this.centerx,
this.centery,
this.radius - prop['chart.label.area'],
( ((prop['chart.green.max'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
( ((prop['chart.red.min'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
false
);
co.lineTo(this.centerx, this.centery);
co.closePath();
co.fill();
/*******************************************************
* Draw the red area
*******************************************************/
var redgrad = prop['chart.red.color'];
// Draw the "tick highlight"
if (prop['chart.tickmarks.highlighted']) {
co.beginPath();
co.lineWidth = 5;
co.strokeStyle = redgrad;
co.arc(this.centerx, this.centery, this.radius - 2.5,(((prop['chart.red.min'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,RG.TWOPI - RG.HALFPI,0);
co.stroke();
co.lineWidth = 1;
}
co.beginPath();
co.fillStyle = redgrad;
co.strokeStyle = redgrad;
co.arc(
this.centerx,
this.centery,
this.radius - prop['chart.label.area'],
(((prop['chart.red.min'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
RG.TWOPI - RG.HALFPI,
false
);
co.lineTo(this.centerx, this.centery);
co.closePath();
co.fill();
/**
* Draw the thick border
*/
if (prop['chart.border']) {
var grad = co.createRadialGradient(this.centerx, this.centery, this.radius, this.centerx, this.centery, this.radius + 20);
grad.addColorStop(0, prop['chart.border.color1']);
grad.addColorStop(0.5, prop['chart.border.color2']);
grad.addColorStop(1, prop['chart.border.color3']);
co.beginPath();
co.fillStyle = grad;
co.strokeStyle = 'rgba(0,0,0,0)'
co.lineWidth = 0.001;
co.arc(this.centerx, this.centery, this.radius + 20, 0, RG.TWOPI, 0);
co.arc(this.centerx, this.centery, this.radius - 2, RG.TWOPI, 0, 1);
co.fill();
}
// Put the linewidth back to what it was
co.lineWidth = prop['chart.linewidth'];
/**
* Draw the title if specified
*/
if (prop['chart.title']) {
RG.DrawTitle(this,
prop['chart.title'],
this.centery - this.radius,
null,
prop['chart.title.size'] ? prop['chart.title.size'] : prop['chart.text.size'] + 2);
}
// Draw the big tick marks
if (!prop['chart.tickmarks.highlighted']) {
for (var i=18; i<=360; i+=36) {
co.beginPath();
co.strokeStyle = prop['chart.tickmarks.big.color'];
co.lineWidth = 2;
co.arc(this.centerx, this.centery, this.radius - 1, RG.degrees2Radians(i), RG.degrees2Radians(i+0.01), false);
co.arc(this.centerx, this.centery, this.radius - 7, RG.degrees2Radians(i), RG.degrees2Radians(i+0.01), false);
co.stroke();
}
}
};
/**
* Draws the needle of the odometer
*
* @param number value The value to represent
* @param string color The color of the needle
* @param number The OPTIONAL length of the needle
*/
this.drawNeedle =
this.DrawNeedle = function (value, color)
{
// The optional length of the needle
var length = arguments[2] ? arguments[2] : this.radius - prop['chart.label.area'];
// ===== First draw a grey background circle =====
co.fillStyle = '#999';
co.beginPath();
co.moveTo(this.centerx, this.centery);
co.arc(this.centerx, this.centery, 10, 0, RG.TWOPI, false);
co.fill();
co.closePath();
co.fill();
// ===============================================
co.fillStyle = color
co.strokeStyle = '#666';
// Draw the centre bit
co.beginPath();
co.moveTo(this.centerx, this.centery);
co.arc(this.centerx, this.centery, 8, 0, RG.TWOPI, false);
co.fill();
co.closePath();
co.stroke();
co.fill();
if (prop['chart.needle.type'] == 'pointer') {
co.strokeStyle = color;
co.lineWidth = prop['chart.needle.width'];
co.lineCap = 'round';
co.lineJoin = 'round';
// Draw the needle
co.beginPath();
// The trailing bit on the opposite side of the dial
co.beginPath();
co.moveTo(this.centerx, this.centery);
if (prop['chart.needle.tail']) {
co.arc(this.centerx,
this.centery,
20,
(((value / this.range) * 360) + 90) / (180 / RG.PI),
(((value / this.range) * 360) + 90 + 0.01) / (180 / RG.PI), // The 0.01 avoids a bug in ExCanvas and Chrome 6
false
);
}
// Draw the long bit on the opposite side
co.arc(this.centerx,
this.centery,
length - 10,
(((value / this.range) * 360) - 90) / (180 / RG.PI),
(((value / this.range) * 360) - 90 + 0.1 ) / (180 / RG.PI), // The 0.1 avoids a bug in ExCanvas and Chrome 6
false
);
co.closePath();
//co.stroke();
//co.fill();
} else if (prop['chart.needle.type'] == 'triangle') {
co.lineWidth = 0.01;
co.lineEnd = 'square';
co.lineJoin = 'miter';
/**
* This draws the version of the pointer that becomes the border
*/
co.beginPath();
co.fillStyle = prop['chart.needle.triangle.border'];
co.arc(this.centerx, this.centery, 11, (((value / this.range) * 360)) / 57.3, ((((value / this.range) * 360)) + 0.01) / 57.3, 0);
co.arc(this.centerx, this.centery, 11, (((value / this.range) * 360) + 180) / 57.3, ((((value / this.range) * 360) + 180) + 0.01)/ 57.3, 0);
co.arc(this.centerx, this.centery, length - 5, (((value / this.range) * 360) - 90) / 57.3, ((((value / this.range) * 360) - 90) / 57.3) + 0.01, 0);
co.closePath();
co.fill();
co.beginPath();
co.arc(this.centerx, this.centery, 15, 0, RG.TWOPI, 0);
co.closePath();
co.fill();
// This draws the pointer
co.beginPath();
co.strokeStyle = 'black';
co.fillStyle = color;
co.arc(this.centerx, this.centery, 7, (((value / this.range) * 360)) / 57.3, ((((value / this.range) * 360)) + 0.01) / 57.3, 0);
co.arc(this.centerx, this.centery, 7, (((value / this.range) * 360) + 180) / 57.3, ((((value / this.range) * 360) + 180) + 0.01)/ 57.3, 0);
co.arc(this.centerx, this.centery, length - 13, (((value / this.range) * 360) - 90) / 57.3, ((((value / this.range) * 360) - 90) / 57.3) + 0.01, 0);
co.closePath();
co.stroke();
co.fill();
/**
* This is here to accomodate the MSIE/ExCanvas combo
*/
co.beginPath();
co.arc(this.centerx, this.centery, 7, 0, RG.TWOPI, 0);
co.closePath();
co.fill();
}
co.stroke();
co.fill();
// Draw the mini center circle
co.beginPath();
co.fillStyle = color;
co.arc(this.centerx, this.centery, prop['chart.needle.type'] == 'pointer' ? 7 : 12, 0.01, RG.TWOPI, false);
co.fill();
// This draws the arrow at the end of the line
if (prop['chart.needle.head'] && prop['chart.needle.type'] == 'pointer') {
co.lineWidth = 1;
co.fillStyle = color;
// round, bevel, miter
co.lineJoin = 'miter';
co.lineCap = 'butt';
co.beginPath();
co.arc(this.centerx, this.centery, length - 5, (((value / this.range) * 360) - 90) / 57.3, (((value / this.range) * 360) - 90 + 0.1) / 57.3, false);
co.arc(this.centerx,
this.centery,
length - 20,
RG.degrees2Radians( ((value / this.range) * 360) - (length < 60 ? 80 : 85) ),
RG.degrees2Radians( ((value / this.range) * 360) - (length < 60 ? 100 : 95) ),
1);
co.closePath();
co.fill();
//co.stroke();
}
/**
* Draw a white circle at the centre
*/
co.beginPath();
co.fillStyle = 'gray';
co.moveTo(this.centerx, this.centery);
co.arc(this.centerx,this.centery,2,0,6.2795,false);
co.closePath();
co.fill();
};
/**
* Draws the labels for the Odo
*/
this.drawLabels =
this.DrawLabels = function ()
{
var size = prop['chart.text.size'];
var font = prop['chart.text.font'];
var centerx = this.centerx;
var centery = this.centery;
var r = this.radius - (prop['chart.label.area'] / 2);
var start = this.min;
var end = this.max;
var decimals = prop['chart.scale.decimals'];
var labels = prop['chart.labels'];
var units_pre = prop['chart.units.pre'];
var units_post = prop['chart.units.post'];
co.beginPath();
co.fillStyle = prop['chart.text.color'];
/**
* If labels are specified, use those
*/
if (labels) {
for (var i=0; i<labels.length; ++i) {
RG.Text2(this, {'font':font,
'size':size,
'x':centerx + (Math.cos(((i / labels.length) * RG.TWOPI) - RG.HALFPI) * (this.radius - (prop['chart.label.area'] / 2) ) ), // Sin A = Opp / Hyp
'y':centery + (Math.sin(((i / labels.length) * RG.TWOPI) - RG.HALFPI) * (this.radius - (prop['chart.label.area'] / 2) ) ), // Cos A = Adj / Hyp
'text': String(labels[i]),
'valign':'center',
'halign':'center',
'tag': 'labels'
});
}
/**
* If not, use the maximum value
*/
} else {
RG.Text2(this, {'font':font,'size':size,'x':centerx + (0.588 * r ),'y':centery - (0.809 * r ),'text':RG.number_format(this, (((end - start) * (1/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','angle':36,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx + (0.951 * r ),'y':centery - (0.309 * r),'text':RG.number_format(this, (((end - start) * (2/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','angle':72,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx + (0.949 * r),'y':centery + (0.31 * r),'text':RG.number_format(this, (((end - start) * (3/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','angle':108,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx + (0.588 * r ),'y':centery + (0.809 * r ),'text':RG.number_format(this, (((end - start) * (4/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','angle':144,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx,'y':centery + r,'text':RG.number_format(this, (((end - start) * (5/10)) + start).toFixed(decimals),units_pre, units_post),'halign':'center','valign':'center','angle':180,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx - (0.588 * r ),'y':centery + (0.809 * r ),'text':RG.number_format(this, (((end - start) * (6/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','angle':216,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx - (0.949 * r),'y':centery + (0.300 * r),'text':RG.number_format(this, (((end - start) * (7/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','angle':252,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx - (0.951 * r),'y':centery - (0.309 * r),'text':RG.number_format(this, (((end - start) * (8/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','angle':288,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx - (0.588 * r ),'y':centery - (0.809 * r ),'text':RG.number_format(this, (((end - start) * (9/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','angle':324,'tag': 'scale'});
RG.Text2(this, {'font':font,'size':size,'x':centerx,'y':centery - r,'text': prop['chart.zerostart'] ? RG.number_format(this, this.min.toFixed(decimals), units_pre, units_post) : RG.number_format(this, (((end - start) * (10/10)) + start).toFixed(decimals), units_pre, units_post),'halign':'center','valign':'center','tag': 'scale'});
}
co.fill();
/**
* Draw the text label below the center point
*/
if (prop['chart.value.text']) {
co.strokeStyle = 'black';
RG.Text2(this, {'font':font,
'size':size+2,
'x':centerx,
'y':centery + size + 15,
'text':String(prop['chart.value.units.pre'] + this.value.toFixed(prop['chart.value.text.decimals']) + prop['chart.value.units.post']),
'halign':'center',
'valign':'center',
'bounding':true,
'boundingFill':'white',
'tag': 'value.text'
});
}
};
/**
* A placeholder function
*
* @param object The event object
*/
this.getShape = function (e) {};
/**
* This function returns the pertinent value at the point of click
*
* @param object The event object
*/
this.getValue = function (e)
{
var mouseXY = RG.getMouseXY(e)
var angle = RG.getAngleByXY(this.centerx, this.centery, mouseXY[0], mouseXY[1]);
angle += RG.HALFPI;
if (mouseXY[0] >= this.centerx && mouseXY[1] <= this.centery) {
angle -= RG.TWOPI;
}
var value = ((angle / RG.TWOPI) * (this.max - this.min)) + this.min;
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 = RG.getMouseXY(e);
var radius = RG.getHypLength(this.centerx, this.centery, mouseXY[0], mouseXY[1]);
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)
&& radius <= this.radius
) {
return this;
}
};
/**
* 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(ca);
RG.redrawCanvas(ca);
RG.fireCustomEvent(this, 'onadjust');
}
};
/**
* This method returns the appropriate angle for a value
*
* @param number value The value
*/
this.getAngle = function (value)
{
// Higher than max or lower than min
if (value > this.max || value < this.min) {
return null;
}
var angle = (((value - this.min) / (this.max - this.min)) * RG.TWOPI);
angle -= RG.HALFPI;
return angle;
};
/**
* 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['chart.green.color'] = RG.array_clone(prop['chart.green.color']);
this.original_colors['chart.yellow.color'] = RG.array_clone(prop['chart.yellow.color']);
this.original_colors['chart.red.color'] = RG.array_clone(prop['chart.red.color']);
}
// Parse the basic colors
prop['chart.green.color'] = this.parseSingleColorForGradient(prop['chart.green.color']);
prop['chart.yellow.color'] = this.parseSingleColorForGradient(prop['chart.yellow.color']);
prop['chart.red.color'] = this.parseSingleColorForGradient(prop['chart.red.color']);
};
/**
* 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;
};
/**
* 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 function runs once only
* (put at the end of the file (before any effects))
*/
this.firstDrawFunc = function ()
{
};
/**
* Odo Grow
*
* This effect gradually increases the represented value
*
* @param An object of effect properties - eg: {frames: 30}
* @param function An optional callback function
*/
this.grow = function ()
{
var obj = this;
var opt = arguments[0] || {};
var frames = opt.frames || 30;
var frame = 0;
var current = obj.currentValue || 0;
var origValue = Number(obj.currentValue);
var newValue = obj.value;
var diff = newValue - origValue;
var step = (diff / frames);
var callback = arguments[1] || function () {};
function iterator ()
{
obj.value = origValue + (frame * step);
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);
}
};