// o---------------------------------------------------------------------------------o
// | This file is part of the RGraph package - you can learn more at: |
// | |
// | https://www.rgraph.net/license.html |
// | |
// | RGraph is dual-licensed under the Open Source GPL license. That means that it's |
// | free to use and there are no restrictions on what you can use RGraph for! |
// | If the GPL license does not suit you however, then there's an inexpensive |
// | commercial license option available. See the URL above for more details. |
// o---------------------------------------------------------------------------------o
RGraph = window.RGraph || {isrgraph:true,isRGraph:true,rgraph:true};
// The chart constructor. This function sets up the object. It takes the ID (the HTML attribute) of the canvas as the
// first argument and the data as the second. If you need to change this, you can.
//
RGraph.Thermometer = function (conf)
{
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.uid = RGraph.createUID();
this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.createUID();
this.colorsParsed = false;
this.type = 'thermometer';
this.isRGraph = true;
this.isrgraph = true;
this.rgraph = true;
this.min = RGraph.stringsToNumbers(conf.min);
this.max = RGraph.stringsToNumbers(conf.max);
this.value = RGraph.stringsToNumbers(conf.value);
this.graphArea = [];
this.currentValue = null;
this.coords = [];
this.coordsText = [];
this.original_colors = [];
this.firstDraw = true; // After the first draw this will be false
this.stopAnimationRequested = false;// Used to control the animations
this.properties =
{
linewidth: 1,
backgroundColor: 'white',
colorsStroke: 'black',
colors: ['red'],
marginLeft: 35,
marginRight: 35,
marginTop: 35,
marginBottom: 35,
tickmarksSize: 2,
tickmarksCount: 10,
textColor: 'black',
textFont: 'Arial, Verdana, sans-serif',
textSize: 12,
textBold: false,
textItalic: false,
textAccessible: false,
textAccessibleOverflow: 'visible',
textAccessiblePointerevents:false,
text: null,
scaleVisible: false,
scaleUnitsPre: '',
scaleUnitsPost: '',
scaleDecimals: 0,
scaleThousand: ',',
scalePoint: '.',
title: '',
titleFont: null,
titleSize: null,
titleColor: null,
titleBold: null,
titleItalic: null,
titleHalign: null,
titleValign: null,
titleOffsetx: 0,
titleOffsety: 0,
titleSubtitle: '',
titleSubtitleSize: null,
titleSubtitleColor: '#aaa',
titleSubtitleFont: null,
titleSubtitleBold: null,
titleSubtitleItalic: null,
titleSubtitleOffsetx: 0,
titleSubtitleOffsety: 0,
titleSide: '',
titleSideBold: null,
titleSideFont: null,
titleSideSize: null,
titleSideColor: null,
titleSideItalic: null,
titleSideOffsetx: 0,
titleSideOffsety: 0,
shadow: true,
shadowOffsetx: 0,
shadowOffsety: 0,
shadowBlur: 15,
shadowColor: '#ddd',
resizable: false,
resizableHandleBackground: null,
contextmenu: null,
adjustable: false,
labelsValue: true,
labelsValueColor: null,
labelsValueFont: null,
labelsValueSize: null,
labelsValueBold: null,
labelsValueItalic: null,
labelsValueDecimals: null,
labelsValueThousand: null,
labelsValuePoint: null,
labelsValueUnitsPre: null,
labelsValueUnitsPost: null,
labelsValueOffsetx: 0,
labelsValueOffsety: 0,
labelsCount: 5,
labelsDecimals: null,
labelsUnitsPre: null,
labelsUnitsPost: null,
labelsPoint: null,
labelsThousand: null,
labelsColor: null,
labelsFont: null,
labelsSize: null,
labelsBold: null,
labelsItalic: null,
labelsOffsetx: 0,
labelsOffsety: 0,
annotatable: false,
annotatableColor: 'black',
annotatableLinewidth: 1,
tooltips: null,
tooltipsHighlight: true,
tooltipsEffect: 'slide',
tooltipsEvent: 'click',
tooltipsCssClass: 'RGraph_tooltip',
tooltipsCss: null,
tooltipsPersistent: false,
tooltipsFormattedThousand: ',',
tooltipsFormattedPoint: '.',
tooltipsFormattedDecimals: 0,
tooltipsFormattedUnitsPre: '',
tooltipsFormattedUnitsPost: '',
tooltipsFormattedKeyColors: null,
tooltipsFormattedKeyColorsShape: 'square',
tooltipsFormattedKeyLabels: [],
tooltipsFormattedListType: 'ul',
tooltipsFormattedListItems: null,
tooltipsFormattedTableHeaders: null,
tooltipsFormattedTableData: null,
tooltipsPointer: true,
tooltipsPointerOffsetx: 0,
tooltipsPointerOffsety: 0,
tooltipsPositionStatic: true,
tooltipsHotspotIgnore: null,
highlightStroke: 'rgba(0,0,0,0)',
highlightFill: 'rgba(255,255,255,0.7)',
clearto: 'rgba(0,0,0,0)',
bulbBottomRadiusAdjust: 0,
bulbBottomRadius: null
}
//
// Add the reverse look-up table for property names
// so that property names can be specified in any case.
//
this.properties_lowercase_map = [];
for (var i in this.properties) {
if (typeof i === 'string') {
this.properties_lowercase_map[i.toLowerCase()] = i;
}
}
//
// A simple check that the browser has canvas support
//
if (!this.canvas) {
alert('[THERMOMETER] No canvas support');
return;
}
//
// The thermometer can only have one data point so only this.$0 needs to be created
//
this.$0 = {};
// Easy access to properties and the path function
var properties = this.properties;
this.path = RGraph.pathObjectFunction;
//
// "Decorate" the object with the generic effects if the effects library has been included
//
if (RGraph.Effects && typeof RGraph.Effects.decorate === 'function') {
RGraph.Effects.decorate(this);
}
// Add the responsive method. This method resides in the common file.
this.responsive = RGraph.responsive;
//
// A setter.
this.set = function (name)
{
var value = typeof arguments[1] === 'undefined' ? null : arguments[1];
// Go through all of the properties and make sure
// that they're using the correct capitalisation
if (typeof name === 'string') {
name = this.properties_lowercase_map[name.toLowerCase()] || name;
}
// Set the colorsParsed flag to false if the colors
// property is being set
if (name === 'colors') {
this.colorsParsed = false;
}
// the number of arguments is only one and it's an
// object - parse it for configuration data and return.
if (arguments.length === 1 && typeof arguments[0] === 'object') {
for (i in arguments[0]) {
if (typeof i === 'string') {
this.set(i, arguments[0][i]);
}
}
return this;
}
properties[name] = value;
return this;
};
//
// A getter.
//
// @param name string The name of the property to get
//
this.get = function (name)
{
// Go through all of the properties and make sure
// that they're using the correct capitalisation
name = this.properties_lowercase_map[name.toLowerCase()] || name;
return properties[name];
};
//
// Draws the thermometer
//
this.draw = function ()
{
// Fire the custom RGraph onbeforedraw event (which should be fired before the chart is drawn)
RGraph.fireCustomEvent(this, 'onbeforedraw');
// Translate half a pixel for antialiasing purposes - but only if it hasn't been
// done already
//
// MUST be the first thing done!
//
if (!this.canvas.__rgraph_aa_translated__) {
this.context.translate(0.5,0.5);
this.canvas.__rgraph_aa_translated__ = true;
}
// Max/min boundary constraints
this.value = Math.min(this.max, this.value);
this.value = Math.max(this.min, this.value);
//
// Parse the colors. This allows for simple gradient syntax
//
if (!this.colorsParsed) {
this.parseColors();
// Don't want to do this again
this.colorsParsed = true;
}
//
// Set the current value
//
this.currentValue = this.value;
//
// Stop this growing uncontrollably
//
this.coordsText = [];
//
// Make the margins easy to access
//
this.marginLeft = properties.marginLeft;
this.marginRight = properties.marginRight;
this.marginTop = properties.marginTop;
this.marginBottom = properties.marginBottom;
// Get the scale
this.scale2 = RGraph.getScale({object: this, options: {
'scale.max': this.max,
'scale.min': this.min,
'scale.strict': true,
'scale.thousand': properties.scaleThousand,
'scale.point': properties.scalePoint,
'scale.decimals': properties.scaleDecimals,
'ylabels.count': properties.labelsCount,
'scale.round': properties.scaleRound,
'scale.units.pre': properties.scaleUnitsPre,
'scale.units.post': properties.scaleUnitsPost
}});
// Work out the coordinates and positions
this.x = this.marginLeft;
this.width = this.canvas.width - this.marginLeft - this.marginRight;
this.y = this.marginTop + (this.width / 2);
this.halfWidth = this.width / 2;
this.bulbTopCenterx = this.marginLeft + (this.width / 2);
this.bulbTopCentery = this.marginTop + (this.width / 2);
this.bulbTopRadius = this.width / 2;
this.bulbBottomCenterx = this.marginLeft + (this.width / 2);
this.bulbBottomRadius = typeof properties.bulbBottomRadius === 'number' ? properties.bulbBottomRadius : this.width * 0.75 + properties.bulbBottomRadiusAdjust;
this.bulbBottomCentery = this.canvas.height - this.marginBottom - this.bulbBottomRadius;
this.scaleTopY = this.bulbTopCentery;
this.scaleBottomY = this.bulbBottomCentery - this.bulbBottomRadius;
this.scaleHeight = this.scaleBottomY - this.scaleTopY;
this.height = this.getYCoord(this.min) - this.getYCoord(this.value);
this.coords[0] = [
this.x,
this.getYCoord(this.value),
this.width,
this.height
];
//
// Install clipping
//
// MUST be the first thing that's done after the
// beforedraw event
//
if (!RGraph.isNullish(this.properties.clip)) {
RGraph.clipTo.start(this, this.properties.clip);
}
// Draw the background
this.drawBackground();
// Draw the bar that represents the value
this.drawBar();
// Draw the tickmarks
this.drawTickMarks();
//
// Draw the label
//
this.drawLabels();
//
// Draw the title
//
if (properties.title) {
this.drawTitle();
}
//
// Draw the side title
//
if (properties.titleSide) {
this.drawSideTitle();
}
//
// Setup the context menu if required
//
if (properties.contextmenu) {
RGraph.showContext(this);
}
//
// Add custom text thats specified
//
RGraph.addCustomText(this);
//
// This installs the event listeners
//
RGraph.installEventListeners(this);
//
// End clipping
//
if (!RGraph.isNullish(this.properties.clip)) {
RGraph.clipTo.end();
}
//
// Fire the onfirstdraw event
//
if (this.firstDraw) {
this.firstDraw = false;
RGraph.fireCustomEvent(this, 'onfirstdraw');
this.firstDrawFunc();
}
//
// Fire the custom RGraph draw event (which should be fired when you have drawn the chart)
//
RGraph.fireCustomEvent(this, 'ondraw');
//
// Install any inline responsive configuration. This
// should be last in the draw function - even after
// the draw events.
//
RGraph.installInlineResponsive(this);
return this;
};
//
// Draws the thermometer
//
this.drawBackground = function ()
{
if (properties.shadow) {
RGraph.setShadow(
this,
properties.shadowColor,
properties.shadowOffsetx,
properties.shadowOffsety,
properties.shadowBlur
);
}
// Draw the outline and background
this.pathBackground();
this.context.strokeStyle = properties.colorsStroke;
this.context.fillStyle = properties.backgroundColor;
this.context.lineWidth = 1 + properties.linewidth;
this.context.stroke();
this.context.fill();
this.context.lineWidth = 1;
};
//
// This draws the bar that indicates the value of the thermometer. It makes use
// of the .pathBar() function.
//
this.drawBar = function ()
{
this.pathBar();
this.path('f %', properties.colors[0]);
};
//
// This function draws the path that indicates the specified value. It
// doesn't stroke or fill the path.
//
this.pathBar = function ()
{
var barHeight = this.coords[0][3],
y = (this.coords[0][1] + this.coords[0][3]) - barHeight
RGraph.noShadow(this);
// Draw the bar that indicates the value
this.path(
'b ss transparent r % % % % m % % a % % % 0 6.28 false',
this.coords[0][0], y, this.coords[0][2], this.bulbBottomCentery - y,
this.bulbBottomCenterx + this.bulbBottomRadius, this.bulbBottomCentery,
this.bulbBottomCenterx, this.bulbBottomCentery, this.bulbBottomRadius
);
};
//
// This function draws the path that indicates that encompasses the
// background. It's used by the overChartArea() function.
//
this.pathBackground = function ()
{
this.path(
'b r % % % % a % % % 3.1415927 6.28 false m % % a % % % 0 6.2830 false c',
this.x,this.scaleTopY,this.coords[0][2],this.bulbBottomCentery - this.scaleTopY,
this.bulbTopCenterx,this.bulbTopCentery,this.bulbTopRadius,
this.bulbBottomCenterx,this.bulbBottomCentery,
this.bulbBottomCenterx,this.bulbBottomCentery,this.bulbBottomRadius
);
};
//
// Draws the tickmarks of the thermometer
//
this.drawTickMarks = function ()
{
if (properties.tickmarksCount) {
var ticksize = properties.tickmarksSize;
this.context.strokeStyle = properties.colorsStroke;
this.context.lineWidth = properties.linewidth / 2;
// Left hand side tickmarks
this.context.beginPath();
for (var i=0; i<=properties.tickmarksCount; ++i) {
var y = this.scaleBottomY - ((this.scaleHeight / properties.tickmarksCount) * i);
this.context.moveTo(this.marginLeft, Math.round(y));
this.context.lineTo(this.marginLeft + ticksize, Math.round(y));
// Right hand side tickmarks
this.context.moveTo(this.canvas.width - this.marginRight, Math.round(y));
this.context.lineTo(this.canvas.width - this.marginRight - ticksize, Math.round(y));
}
this.context.stroke();
this.context.lineWidth = 1;
}
};
//
// Draws the labels of the thermometer. Now (4th August 2011) draws
// the scale too
//
this.drawLabels = function ()
{
//
// This draws draws the label that sits at the top of the chart
//
if (properties.labelsValue) {
// Weird...
var text = properties.scaleVisible ?
RGraph.numberFormat({
object: this,
number: this.value.toFixed(typeof properties.labelsValueDecimals === 'number' ? properties.labelsValueDecimals : properties.scaleDecimals),
unitspre: typeof properties.labelsValueUnitsPre === 'string' ? properties.labelsValueUnitsPre : properties.scaleUnitsPre,
unitspost: typeof properties.labelsValueUnitsPost === 'string' ? properties.labelsValueUnitsPost : properties.scaleUnitsPost,
point: typeof properties.labelsValuePoint === 'string' ? properties.labelsValuePoint : properties.scalePoint,
thousand: typeof properties.labelsValueThousand === 'string' ? properties.labelsValueThousand : properties.scaleThousand
})
:
RGraph.numberFormat({
object: this,
number: this.value.toFixed(typeof properties.labelsValueDecimals === 'number' ? properties.labelsValueDecimals : properties.scaleDecimals),
unitspre: typeof properties.labelsValueUnitsPre === 'string' ? properties.labelsValueUnitsPre : properties.scaleUnitsPre,
unitspost: typeof properties.labelsValueUnitsPost === 'string' ? properties.labelsValueUnitsPost : properties.scaleUnitsPost,
point: typeof properties.labelsValuePoint === 'string' ? properties.labelsValuePoint : properties.scalePoint,
thousand: typeof properties.labelsValueThousand === 'string' ? properties.labelsValueThousand : properties.scaleThousand
});
var textConf = RGraph.getTextConf({
object: this,
prefix: 'labelsValue'
});
RGraph.text({
object: this,
font: textConf.font,
size: textConf.size,
color: textConf.color,
bold: textConf.bold,
italic: textConf.italic,
x: this.coords[0][0] + (this.coords[0][2] / 2) + properties.labelsValueOffsetx,
y: this.coords[0][1] + 7 + properties.labelsValueOffsety,
text: text,
valign: 'top',
halign: 'center',
bounding: true,
boundingFill:'white',
tag: 'labels.value'
});
}
//
// Draw the scale if requested
//
if (properties.scaleVisible) {
this.drawScale();
}
};
//
// Draws the title
//
this.drawTitle = function ()
{
RGraph.drawTitle(this);
};
//
// Draws the title
//
this.drawSideTitle = function ()
{
var textConf = RGraph.getTextConf({
object: this,
prefix: 'titleSide'
});
var x = this.marginLeft - 3;
var y = (this.scaleHeight / 2) + this.marginTop + this.bulbTopRadius;
// Add any use specified offset
if (typeof properties.titleSideOffsetx === 'number') x += properties.titleSideOffsetx;
if (typeof properties.titleSideOffsety === 'number') y += properties.titleSideOffsety;
this.context.fillStyle = properties.textColor;
RGraph.text({
object: this,
font: textConf.font,
size: textConf.size,
color: textConf.color,
bold: textConf.bold,
italic: textConf.italic,
x: x,
y: y,
text: String(properties.titleSide),
valign: 'bottom',
halign: 'center',
angle: 270,
tag: 'title.side',
accessible: false
});
};
//
// Draw the scale if requested
//
this.drawScale = function ()
{
this.context.fillStyle = properties.textColor;
var units_pre = properties.scaleUnitsPre,
units_post = properties.scaleUnitsPost,
decimals = typeof properties.labelsDecimals === 'number' ? properties.labelsDecimals : properties.scaleDecimals,
numLabels = properties.labelsCount,
step = (this.max - this.min) / numLabels;
for (var i=1; i<=numLabels; ++i) {
var x = this.canvas.width - this.marginRight + (properties.linewidth / 2),
y = this.canvas.height - this.marginBottom - (2 * this.bulbBottomRadius) - ((this.scaleHeight / numLabels) * i),
text = RGraph.numberFormat({
object: this,
number: String((this.min + (i * step)).toFixed(decimals)),
unitspre: typeof properties.labelsUnitsPre === 'string' ? properties.labelsUnitsPre : properties.scaleUnitsPre,
unitspost: typeof properties.labelsUnitsPost === 'string' ? properties.labelsUnitsPost : properties.scaleUnitsPost,
point: typeof properties.labelsPoint === 'string' ? properties.labelsPoint : properties.scalePoint,
thousand: typeof properties.labelsThousand === 'string' ? properties.labelsThousand : properties.scaleThousand
});
var textConf = RGraph.getTextConf({
object: this,
prefix: 'labels'
});
RGraph.text({
object: this,
font: textConf.font,
size: textConf.size,
color: textConf.color,
bold: textConf.bold,
italic: textConf.italic,
x: x + 5 + properties.labelsOffsetx,
y: y + properties.labelsOffsety,
text: text,
valign: 'center',
tag: 'scale'
});
}
// Draw zero
RGraph.text({
object: this,
font: textConf.font,
size: textConf.size,
color: textConf.color,
bold: textConf.bold,
italic: textConf.italic,
x: x + 6 + properties.labelsOffsetx,
y: this.bulbBottomCentery - this.bulbBottomRadius + properties.labelsOffsety,
text: RGraph.numberFormat({
object: this,
number: this.min.toFixed(decimals),
unitspre: typeof properties.labelsUnitsPre === 'string' ? properties.labelsUnitsPre : properties.scaleUnitsPre,
unitspost: typeof properties.labelsUnitsPost === 'string' ? properties.labelsUnitsPost : properties.scaleUnitsPost,
point: typeof properties.labelsPoint === 'string' ? properties.labelsPoint : properties.scalePoint,
thousand: typeof properties.labelsThousand === 'string' ? properties.labelsThousand : properties.scaleThousand
}),
valign: 'center',
tag: 'scale'
});
};
//
// Returns the focused/clicked bar
//
// @param event e The event object
//
this.getShape = function (e)
{
var mouseXY = RGraph.getMouseXY(e),
mouseX = mouseXY[0],
mouseY = mouseXY[1];
for (var i=0; i<this.coords.length; i++) {
if (RGraph.tooltipsHotspotIgnore(this, i)) {
continue;
}
var coords = this.coords[i],
left = coords[0],
top = coords[1],
width = coords[2],
height = coords[3];
this.pathBar();
if (
this.context.isPointInPath(mouseX, mouseY)
&& (this.properties.clip ? RGraph.clipTo.test(this, mouseX, mouseY) : true)
) {
var tooltip = RGraph.parseTooltipText ? RGraph.parseTooltipText(properties.tooltips, i) : '';
return {
object: this,
x: left,
y: top,
width: width,
height: height,
index: 0,
dataset: 0,
sequentialIndex: 0,
tooltip: typeof tooltip === 'string' ? tooltip : null
};
}
}
return null;
};
//
// This function returns the value that the mouse is positioned t, regardless of
// the actual indicated value.
//
// @param object e The event object (or it can also be an two element array containing the X/Y coords)
//
this.getValue = function (arg)
{
if (arg.length === 2) {
var mouseX = arg[0],
mouseY = arg[1];
} else {
var mouseXY = RGraph.getMouseXY(arg),
mouseX = mouseXY[0],
mouseY = mouseXY[1];
}
var value = (this.scaleHeight - (mouseY - this.scaleTopY)) / this.scaleHeight;
value *= (this.max - this.min);
value += this.min;
value = Math.max(value, this.min);
value = Math.min(value, this.max);
return value;
};
//
// Each object type has its own Highlight() function which highlights the appropriate shape
//
// @param object shape The shape to highlight
//
this.highlight = function (shape)
{
if (properties.tooltipsHighlight) {
if (typeof properties.highlightStyle === 'function') {
(properties.highlightStyle)(shape);
return;
}
this.pathBar();
this.path(
's % f %',
properties.highlightStroke, properties.highlightFill
);
}
};
//
// 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),
mouseX = mouseXY[0],
mouseY = mouseXY[1]
// Draw the background shape (don't stroke or fill it)
this.pathBackground();
if (this.context.isPointInPath(mouseX, mouseY)) {
return this;
}
};
//
// This method handles the adjusting calculation for when the mouse is moved
//
// @param object e The event object
//
this.adjusting_mousemove = function (e)
{
//
// Handle adjusting for the Thermometer
//
if (properties.adjustable && RGraph.Registry.get('adjusting') && RGraph.Registry.get('adjusting').uid == this.uid) {
var mouseXY = RGraph.getMouseXY(e),
value = this.getValue(e);
if (typeof value == 'number') {
// Fire the onadjust event
RGraph.fireCustomEvent(this, 'onadjust');
this.value = Number(value.toFixed(properties.scaleDecimals));
RGraph.redrawCanvas(this.canvas);
}
}
};
//
// Returns the appropriate Y coord for a value
//
// @param number value The value to return the coord for
//
this.getYCoord = function (value)
{
if (value > this.max || value < this.min) {
return null;
}
var y = Math.abs(value - this.min) / Math.abs(this.max - this.min)
y = y * (this.scaleBottomY - this.scaleTopY);
return this.scaleBottomY - y;
};
//
// This returns true/false as to whether the cursor is over the chart area.
// The cursor does not necessarily have to be over the bar itself.
//
this.overChartArea = function (e)
{
var mouseXY = RGraph.getMouseXY(e),
mouseX = mouseXY[0],
mouseY = mouseXY[1];
this.pathBackground();
return this.context.isPointInPath(mouseX, mouseY);
};
//
// 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.colors = RGraph.arrayClone(properties.colors);
}
var colors = properties.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
//
this.parseSingleColorForGradient = function (color)
{
if (!color) {
return color;
}
if (typeof color === 'string' && color.match(/^gradient\((.*)\)$/i)) {
// Allow for JSON gradients
if (color.match(/^gradient\(({.*})\)$/i)) {
return RGraph.parseJSONGradient({
object: this,
def: RegExp.$1
});
}
var parts = RegExp.$1.split(':');
// Create the gradient
var grad = this.context.createLinearGradient(
properties.marginLeft,
0,
this.canvas.width - properties.marginRight,
0
);
var diff = 1 / (parts.length - 1);
grad.addColorStop(0, RGraph.trim(parts[0]));
for (var j=1; j<parts.length; ++j) {
grad.addColorStop(j * diff, RGraph.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 {
RGraph.addCustomEventListener(this, type, func);
}
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;
};
//
// 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 obj The chart object
// @param Not used - pass null
// @param function An optional callback function
//
this.grow = function ()
{
// Cancel any stop request if one is pending
this.cancelStopAnimation();
var obj = this,
callback = arguments[1] || function () {},
opt = arguments[0] || {},
frames = opt.frames ? opt.frames : 30,
origValue = Number(obj.currentValue),
newValue = obj.value;
newValue = Math.min(newValue, this.max);
newValue = Math.max(newValue, this.min);
var diff = newValue - origValue,
step = (diff / frames),
frame = 0;
function iterate ()
{
if (obj.stopAnimationRequested) {
// Reset the flag
obj.stopAnimationRequested = false;
return;
}
// Set the new value
obj.value = (step * frame) + origValue;
RGraph.clear(obj.canvas);
RGraph.redrawCanvas(obj.canvas);
if (frame < frames) {
frame++;
RGraph.Effects.updateCanvas(iterate);
} else {
callback(obj);
}
}
iterate();
return this;
};
//
// Couple of functions that allow you to control the
// animation effect
//
this.stopAnimation = function ()
{
this.stopAnimationRequested = true;
};
this.cancelStopAnimation = function ()
{
this.stopAnimationRequested = false;
};
//
// A worker function that handles Bar chart specific tooltip substitutions
//
this.tooltipSubstitutions = function (opt)
{
return {
index: 0,
dataset: 0,
sequentialIndex: 0,
value: this.value,
values: [this.value]
};
};
//
// A worker function that returns the correct color/label/value
//
// @param object specific The indexes that are applicable
// @param number index The appropriate index
//
this.tooltipsFormattedCustom = function (specific, index)
{
var color = (properties.tooltipsFormattedKeyColors && properties.tooltipsFormattedKeyColors[0]) ? properties.tooltipsFormattedKeyColors[0] : properties.colors[0];
var label = (properties.tooltipsFormattedKeyLabels && properties.tooltipsFormattedKeyLabels[0]) ? properties.tooltipsFormattedKeyLabels[0] : '';
return {
label: label,
color: color
};
};
//
// This allows for static tooltip positioning
//
this.positionTooltipStatic = function (args)
{
var obj = args.object,
e = args.event,
tooltip = args.tooltip,
index = args.index,
canvasXY = RGraph.getCanvasXY(obj.canvas)
coords = this.coords[args.index];
// Position the tooltip in the X direction
args.tooltip.style.left = (
canvasXY[0] // The X coordinate of the canvas
+ coords[0] // The X coordinate of the point on the chart
+ (coords[2] / 2) // Add half of the width of the bar
- (tooltip.offsetWidth / 2) // Subtract half of the tooltip width
+ obj.properties.tooltipsOffsetx // Add any user defined offset
) + 'px';
args.tooltip.style.top = (
canvasXY[1] // The Y coordinate of the canvas
+ coords[1] // The Y coordinate of the bar on the chart
- tooltip.offsetHeight // The height of the tooltip
- 10 // An arbitrary amount
+ obj.properties.tooltipsOffsety // Add any user defined offset
) + 'px';
// If the top of the tooltip is off the top of the page
// then move the tooltip down
if(parseFloat(args.tooltip.style.top) < 0) {
args.tooltip.style.top = parseFloat(args.tooltip.style.top) + (coords[3] / 2) + 5 + 'px';
}
};
//
// This function handles clipping to scale values. Because
// each chart handles scales differently, a worker function
// is needed instead of it all being done centrally in the
// RGraph.clipTo.start() function.
//
// @param string clip The clip string as supplied by the
// user in the chart configuration
//
this.clipToScaleWorker = function (clip)
{
// The Regular expression is actually done by the
// calling RGraph.clipTo.start() function in the core
// library
if (RegExp.$1 === 'min') from = this.min; else from = Number(RegExp.$1);
if (RegExp.$2 === 'max') to = this.max; else to = Number(RegExp.$2);
var y1 = this.getYCoord(from),
y2 = this.getYCoord(to);
// Change the angle if the number is "min"
if (RegExp.$1 === 'min') {
y1 = this.canvas.height;
}
// Change the angle if the number is "max"
if (RegExp.$2 === 'max') {
y2 = 0;
}
this.path(
'sa b r % % % % cl',
0,y2,this.canvas.width, Math.max(y1, y2) - Math.min(y1, y2)
);
};
//
// This function handles TESTING clipping to scale values.
// Because each chart handles scales differently, a worker
// function is needed instead of it all being done centrally
// in the RGraph.clipTo.start() function.
//
// @param string clip The clip string as supplied by the
// user in the chart configuration
//
this.clipToScaleTestWorker = function (clip)
{
// The Regular expression is actually done by the
// calling RGraph.clipTo.start() function in the core
// library
if (RegExp.$1 === 'min') from = this.min; else from = Number(RegExp.$1);
if (RegExp.$2 === 'max') to = this.max; else to = Number(RegExp.$2);
var y1 = this.getYCoord(from),
y2 = this.getYCoord(to);
// Change the angle if the number is "min"
if (RegExp.$1 === 'min') {
y1 = this.canvas.height;
}
// Change the angle if the number is "max"
if (RegExp.$2 === 'max') {
y2 = 0;
}
this.path(
'b r % % % %',
0,y2,this.canvas.width, Math.max(y1, y2) - Math.min(y1, y2)
);
};
//
// Now, because canvases can support multiple charts, canvases must always be registered
//
RGraph.register(this);
//
// This is the 'end' of the constructor so if the first argument
// contains configuration data - handle that.
//
RGraph.parseObjectStyleConfig(this, conf.options);
};