Pie chart API reference
Summary: Documentation about the Pie chart including information about all of the options that are available to you. The Pie chart can show a single dataset and with the donut option it can show multiple datasets. Some people find them to be quite contentious though as comparing individual pieces of data can be tricky.
- Example
- Properties
- Methods
- Custom RGraph events that are available
- The Horseshoe Meter
- The Segmented Meter
- The Activity Meter
- The RadialProgress Meter
- Animation effects
Example
<script> labels = ['Fred','Rich','John','Paul','Jason','Hoolio','Kevin']; new RGraph.Pie({ id: 'cvs', data: [564,155,499,611,322,568,389], options: { tooltips: '<b>Results:</b><br />%{key}', tooltipsFormattedKeyLabels: labels, labels: labels, linewidth: 2, colorsStroke: 'white', shadow: false, tooltipsCss: { fontSize: '16pt', textAlign: 'left' }, exploded: [25] } }).draw(); </script>
Properties
You can use these properties to control how the pie chart looks. You can set
them by using the set()
method. Eg:
obj.set('name', 'value');
- Chart configuration properties
- Margin properties
- Color properties
- Labels and text properties
- Title properties
- Shadow properties
- Interactive features properties
- Key properties
- Miscellaneous properties
Chart configuration properties
If required, you can position the Pie chart using this instead of the margins.
Default: null
centery
If required, you can position the Pie chart using this instead of the margins.
Default: null
radius
If required, you can size the Pie chart using this instead of the margins.
Default: null
Margin properties
The left margin of the chart, (the margin is where the labels and title are)).
Default: 35
marginRight
The right margin of the chart, (the margin is where the labels and title are).
Default: 35
marginTop
The top margin of the chart, (the margin is where the labels and title are).
Default: 35
marginBottom
The bottom margin of the chart, (the margin is where the labels and title are).
Default: 35
Color properties
Colors to be used for the pie segments.
Default: ['rgb(255,0,0)', '#ddd', 'rgb(0,255,0)', 'rgb(0,0,255)', 'rgb(255,255,0)', 'rgb(0,255,255)', 'red', 'pink', 'black', 'white']
colorsStroke
The color of the separating lines. This can also be an array of different colors - eg
pie.set('colorsStroke', ['red', 'blue', 'green']);
.Default: #999
Labels and text properties
Property | Description | Default |
---|---|---|
textAccessible | A new feature in 2016 that allows you to use DOM text in place of canvas text. It makes for much higher quality text that you can also select if desired (for copy/paste operations). It won't fit all situations and you can read more about the DOM text feature here. A good way to control borders/margins/padding etc is not to set them on the canvas but to wrap the canvas in a div and set them on that like this: <div style="margin-left: 50px; display: inline-block"> | true |
textAccessibleOverflow | This can be visible or hidden and it controls whether the text is clipped to the edges of the canvas. It defaults to be visible and means you can set small margins if you wish. | visible |
textAccessiblePointerevents | This controls whether the DOM text responds to mouse based events or not (it sets the pointer-events CSS property to none ). | true |
textSize | The size of the text. | 10 |
textFont | The font used to render the text. | Arial, Verdana, sans-serif |
textColor | The color of the labels. | black |
textItalic | Whether the text on the chart is italic or not. | false |
textBold | Whether the text on the chart is bold or not. | false |
labels | An array of labels to be used for the chart. | An empty array |
labelsFont | The font used to render the labels. | null |
labelsSize | The size of the labels. | null |
labelsColor | The color of the labels. | null |
labelsBold | Whether the labels are bold or not. | null |
labelsItalic | Whether the labels are italic or not. | null |
labelsSticksLinewidth | Sets the linewidth of the label sticks. | 1 |
labelsList | A new way of organising the labels - this should help avoid label text overlaps. | true |
labelsIngraph | This shows in-graph labels in each segment. | false |
labelsIngraphBounding | Whether the in-graph labels are surrounded by a bounding box. | false |
labelsIngraphBoundingFill | The fill color of the bounding square. | white |
labelsIngraphBoundingStroke | The stroke color of the bounding square. | rgba(0,0,0,0) |
labelsIngraphUnitsPre | This string is prepended to the label. | (empty string) |
labelsIngraphUnitsPost | This string is appended to the label. | (empty string) |
labelsIngraphRadius | If specified this is the radius that the labels are positioned at. If it's a number between 0 and 2 it is multiplied with the radius to get the position. If it's above 2 though it's used as the exact radius. | null |
labelsIngraphPoint | The character used as the decimal point. | . |
labelsIngraphThousand | The character used as the thousand separator. | , |
labelsIngraphDecimals | The number of decimals shown on the ingraph labels. | |
labelsIngraphColor | The color of the labels. | null |
labelsIngraphFont | The font to use for the ingraph labels. | null |
labelsIngraphSize | The size of the ingraph labels. | null |
labelsIngraphBold | Whether the ingraph labels are bold or not. | null |
labelsIngraphItalic | Whether the ingraph labels are italic or not. | null |
labelsIngraphSpecific | Instead of the values you use this option to specify the text that is shown. | null |
labelsCenter | This can show a label in the center of the chart. This should be a string - ie the label that you want to show. | [An empty string] |
labelsCenterSize | The size of the center label. | 26 |
labelsCenterFont | The font used to render the label. | Arial |
labelsCenterColor | The color of the center label. | black |
labelsCenterItalic | Whether the center label is italic. | false |
labelsCenterBold | Whether the center label is bold. | false |
A new feature in 2016 that allows you to use DOM text in place of canvas text. It makes for much higher quality text that you can also select if desired (for copy/paste operations). It won't fit all situations and you can read more about the DOM text feature here. A good way to control borders/margins/padding etc is not to set them on the canvas but to wrap the canvas in a div and set them on that like this:
<div style="margin-left: 50px; display: inline-block">
<canvas id="cvs" width="650" height="250"></canvas>
</div>
Default: true
textAccessibleOverflow
This can be
visible
or hidden
and it controls whether the text is clipped to the edges of the canvas. It defaults to be visible and means you can set small margins if you wish.Default: visible
textAccessiblePointerevents
This controls whether the DOM text responds to mouse based events or not (it sets the
pointer-events
CSS property to none
).Default: true
textSize
The size of the text.
Default: 10
textFont
The font used to render the text.
Default: Arial, Verdana, sans-serif
textColor
The color of the labels.
Default: black
textItalic
Whether the text on the chart is italic or not.
Default: false
textBold
Whether the text on the chart is bold or not.
Default: false
labels
An array of labels to be used for the chart.
Default: An empty array
labelsFont
The font used to render the labels.
Default: null
labelsSize
The size of the labels.
Default: null
labelsColor
The color of the labels.
Default: null
labelsBold
Whether the labels are bold or not.
Default: null
labelsItalic
Whether the labels are italic or not.
Default: null
labelsSticksLinewidth
Sets the linewidth of the label sticks.
Default: 1
labelsList
A new way of organising the labels - this should help avoid label text overlaps.
Default: true
labelsIngraph
This shows in-graph labels in each segment.
Default: false
labelsIngraphBounding
Whether the in-graph labels are surrounded by a bounding box.
Default: false
labelsIngraphBoundingFill
The fill color of the bounding square.
Default: white
labelsIngraphBoundingStroke
The stroke color of the bounding square.
Default: rgba(0,0,0,0)
labelsIngraphUnitsPre
This string is prepended to the label.
Default: (empty string)
labelsIngraphUnitsPost
This string is appended to the label.
Default: (empty string)
labelsIngraphRadius
If specified this is the radius that the labels are positioned at. If it's a number between 0 and 2 it is multiplied with the radius to get the position. If it's above 2 though it's used as the exact radius.
Default: null
labelsIngraphPoint
The character used as the decimal point.
Default: .
labelsIngraphThousand
The character used as the thousand separator.
Default: ,
labelsIngraphDecimals
The number of decimals shown on the ingraph labels.
Default: 0
labelsIngraphColor
The color of the labels.
Default: null
labelsIngraphFont
The font to use for the ingraph labels.
Default: null
labelsIngraphSize
The size of the ingraph labels.
Default: null
labelsIngraphBold
Whether the ingraph labels are bold or not.
Default: null
labelsIngraphItalic
Whether the ingraph labels are italic or not.
Default: null
labelsIngraphSpecific
Instead of the values you use this option to specify the text that is shown.
Default: null
labelsCenter
This can show a label in the center of the chart. This should be a string - ie the label that you want to show.
Default: [An empty string]
labelsCenterSize
The size of the center label.
Default: 26
labelsCenterFont
The font used to render the label.
Default: Arial
labelsCenterColor
The color of the center label.
Default: black
labelsCenterItalic
Whether the center label is italic.
Default: false
labelsCenterBold
Whether the center label is bold.
Default: false
Title properties
The title of the pie chart.
Default: none
titleFont
The font that the title is rendered in. If not specified the
textFont
setting is used (usually Arial).Default: null
titleSize
The size of the title. If not specified the size is usually 2pt bigger than the
textSize
setting.Default: null
titleBold
Whether the title is bold or not.
Default: null
titleItalic
Whether the title is italic or not.
Default: null
titleBackground
The background color (if any) for the title.
Default: null
titleColor
The color of the title.
Default: black
titleX
To give the exact X coordinate for the title - use this. This can also be a string like this: "-5" -- in which case it's converted to a number and added to the calculated coordinate - allowing you to adjust the calculated coordinate.
Default: null
titleY
To give the exact Y coordinate for the title - use this. This can also be a string like this: "-5" -- in which case it's converted to a number and added to the calculated coordinate - allowing you to adjust the calculated coordinate.
Default: null
titleHalign
The horizontal alignment of the title.
Default: center (can change depending on other options)
titleValign
The vertical alignment of the title.
Default: center (can change depending on other options)
Shadow properties
Whether a drop shadow is applied.
Default: true
shadowColor
The color of the shadow.
Default: #aaaa
shadowOffsetx
The X offset of the shadow.
Default: 0
shadowOffsety
The Y offset of the shadow.
Default: 0
shadowBlur
The severity of the shadow blurring effect.
Default: 15
Interactive features properties
Property | Description | Default |
---|---|---|
tooltips | A numerically indexed array of tooltips that are shown when a bar is clicked. These can contain HTML. | [] |
tooltipsEvent | This is the event that triggers the tooltips. It can be either click or mousemove . | click |
tooltipsEffect | The effect used for showing tooltips. Can be either fade or none . | fade |
tooltipsOverride | If you wish to handle showing tooltips yourself, this should be a function object which does just that. There's more information on the tooltips documentation page. | null |
tooltipsNohideonclear | Not an option that you'll need particularly often if at all. Setting this to true means that when you call the RGraph.clear() API function tooltips do not get hidden. | false |
tooltipsFormattedPoint | When using formatted tooltip strings this is used as the point when using the %{value_formatted} option. | . |
tooltipsFormattedThousand | When using formatted tooltip strings this is used as the thousand separator when using the %{value_formatted} option. | , |
tooltipsFormattedDecimals | When using formatted tooltip strings this specifies the number of decimals when using the %{value_formatted} option. | |
tooltipsFormattedUnitsPre | When using formatted tooltip strings these units are prepended to the number when using the %{value_formatted} option. | (an empty string) |
tooltipsFormattedUnitsPost | When using formatted tooltip strings these units are appended to the number when using the %{value_formatted} option. | (an empty string) |
tooltipsFormattedKeyColors | When using formatted tooltip strings you can give specific colors for the %{key} option to use. | null |
tooltipsFormattedKeyColorsShape | This is the shape that's used in the tooltip key. It can be square or circle | square |
tooltipsFormattedKeyColorsCss | By using this property you can add CSS values to the key color shape that appears in the tooltip key. Note the property name is "color" and not "colors" like previous properties. It should be an object of CSS properties like this: tooltipsFormattedKeyColorsCss : { border: "1 px solid #ddd"; } | null |
tooltipsFormattedKeyLabels | When using formatted tooltip strings these are the labels that are displayed. | [] (an empty array) |
tooltipsFormattedListType | With this property you can switch between an unordered list (the default) and an ordered list. Possible values are ul and ol . | ul |
tooltipsFormattedListItems | This should be a two-dimension array of the list items that are to be shown for all of the tooltips. An example of this property is:tooltipsFormattedListItems: [ ['Bill','Jerry','Berty'], // First tooltip ['Gill','Carrie','Lucy'], // Second tooltip ['Pob','Nobby','Hilda'] // Third tooltip ]You can use CSS to style this list - for example: .RGraph_tooltip ul#rgraph_formatted_tooltips_list li { text-align: left; color: yellow; } | null |
tooltipsFormattedTableHeaders | When showing a table in the tooltips this can be an array of headers for the table. These are added to the tooltip using <th> tags. | null |
tooltipsFormattedTableData | This is the data that is added to the table. This is a 3-dimensional array so it's easy to make a mistake. See the example, copy the code from it and then modify it suit. You'll create fewer bugs this way. | null) |
tooltipsPointer | By default the tooltips have a small triangular pointer that points to the shape that was clicked on. You can turn this off with this property. | true |
tooltipsPointerCss | If you want any CSS values applied to the tooltips pointer (for example a CSS border) then specify an object containing those values to this property. For example: tooltips: { borderLeft: 'gray 2px solid', borderBottom: 'gray 2px solid' } | null |
tooltipsPositionStatic | The new default (as of August 2020) is for tooltips to be positioned statically and not be dependent on the mouse position. If you don't want this for whatever reason, you can disable it with this setting. When you set it to false tooltips are positioned next to the mouse pointer. | true |
tooltipsCss | If you want to specify some CSS that gets applied to all of the tooltips, but don't want to use the RGraph.tooltips.style object (which gets applied to all of the tooltips on the page for every chart) you can use this property to give some per-object CSS for the tooltips. These are CSS styles that get applied to all of the tooltips for the specific object only. It should look like this:tooltipsCss: { fontFamily: 'Verdana', fontSize: '20pt' } | null |
tooltipsCssClass | This is the name of the CSS class the chart uses. | RGraph_tooltip |
tooltipsOffsetx | This property allows you to shift the tooltips left or right. | |
tooltipsOffsety | This property allows you to shift the tooltips up or down. | |
contextmenu | An array of context menu items. More information about context menus is here. | [] (An empty array) |
annotatable | Whether annotations are enabled for the chart (ie you can draw on the chart interactively. | false |
annotatableColor | If you do not allow the use of the palette, then this will be the only color allowed for annotations. | black |
annotatableLinewidth | This is the linewidth of the annotations. | 1 |
A numerically indexed array of tooltips that are shown when a bar is clicked. These can contain HTML.
Default: []
tooltipsEvent
This is the event that triggers the tooltips. It can be either
click
or mousemove
.Default: click
tooltipsEffect
The effect used for showing tooltips. Can be either
fade
or none
.Default: fade
tooltipsOverride
If you wish to handle showing tooltips yourself, this should be a function object which does just that. There's more information on the tooltips documentation page.
Default: null
tooltipsNohideonclear
Not an option that you'll need particularly often if at all. Setting this to true means that when you call the
RGraph.clear()
API function tooltips do not get hidden.Default: false
tooltipsFormattedPoint
When using formatted tooltip strings this is used as the point when using the %{value_formatted} option.
Default: .
tooltipsFormattedThousand
When using formatted tooltip strings this is used as the thousand separator when using the %{value_formatted} option.
Default: ,
tooltipsFormattedDecimals
When using formatted tooltip strings this specifies the number of decimals when using the %{value_formatted} option.
Default: 0
tooltipsFormattedUnitsPre
When using formatted tooltip strings these units are prepended to the number when using the %{value_formatted} option.
Default: (an empty string)
tooltipsFormattedUnitsPost
When using formatted tooltip strings these units are appended to the number when using the %{value_formatted} option.
Default: (an empty string)
tooltipsFormattedKeyColors
When using formatted tooltip strings you can give specific colors for the
%{key}
option to use.Default: null
tooltipsFormattedKeyColorsShape
This is the shape that's used in the tooltip key. It can be
square
or circle
Default: square
tooltipsFormattedKeyColorsCss
By using this property you can add CSS values to the key color shape that appears in the tooltip key. Note the property name is "color" and not "colors" like previous properties. It should be an object of CSS properties like this:
tooltipsFormattedKeyColorsCss : { border: "1 px solid #ddd"; }
Default: null
tooltipsFormattedKeyLabels
When using formatted tooltip strings these are the labels that are displayed.
Default: [] (an empty array)
tooltipsFormattedListType
With this property you can switch between an unordered list (the default) and an ordered list. Possible values are
ul
and ol
.Default: ul
tooltipsFormattedListItems
This should be a two-dimension array of the list items that are to be shown for all of the tooltips. An example of this property is:
tooltipsFormattedListItems: [ ['Bill','Jerry','Berty'], // First tooltip ['Gill','Carrie','Lucy'], // Second tooltip ['Pob','Nobby','Hilda'] // Third tooltip ]You can use CSS to style this list - for example:
.RGraph_tooltip ul#rgraph_formatted_tooltips_list li { text-align: left; color: yellow; }
Default: null
tooltipsFormattedTableHeaders
When showing a table in the tooltips this can be an array of headers for the table. These are added to the tooltip using
<th>
tags.Default: null
tooltipsFormattedTableData
This is the data that is added to the table. This is a 3-dimensional array so it's easy to make a mistake. See the example, copy the code from it and then modify it suit. You'll create fewer bugs this way.
Default: null)
tooltipsPointer
By default the tooltips have a small triangular pointer that points to the shape that was clicked on. You can turn this off with this property.
Default: true
tooltipsPointerCss
If you want any CSS values applied to the tooltips pointer (for example a CSS border) then specify an object containing those values to this property. For example:
tooltips: { borderLeft: 'gray 2px solid', borderBottom: 'gray 2px solid' }
Default: null
tooltipsPositionStatic
The new default (as of August 2020) is for tooltips to be positioned statically and not be dependent on the mouse position. If you don't want this for whatever reason, you can disable it with this setting. When you set it to
false
tooltips are positioned next to the mouse pointer.Default: true
tooltipsCss
If you want to specify some CSS that gets applied to all of the tooltips, but don't want to use the
RGraph.tooltips.style
object (which gets applied to all of the tooltips on the page for every chart) you can use this property to give some per-object CSS for the tooltips. These are CSS styles that get applied to all of the tooltips for the specific object only. It should look like this:tooltipsCss: { fontFamily: 'Verdana', fontSize: '20pt' }
Default: null
tooltipsCssClass
This is the name of the CSS class the chart uses.
Default: RGraph_tooltip
tooltipsOffsetx
This property allows you to shift the tooltips left or right.
Default: 0
tooltipsOffsety
This property allows you to shift the tooltips up or down.
Default: 0
contextmenu
An array of context menu items. More information about context menus is here.
Default: [] (An empty array)
annotatable
Whether annotations are enabled for the chart (ie you can draw on the chart interactively.
Default: false
annotatableColor
If you do not allow the use of the palette, then this will be the only color allowed for annotations.
Default: black
annotatableLinewidth
This is the linewidth of the annotations.
Default: 1
Key properties
The key properties are documented on the key documentation page.Miscellaneous properties
By setting this to roughly 5, and setting the
colorsStroke
to the same color as your background color you will get a segment separation effect.Default: 1
variant
This can be either
pie
(the default), pie3d
, donut
or donut3d
. Setting this to donut
or donut3d
is how you get a donut chart.Default: pie
variantThreedDepth
This is the depth of the 3D Pie chart.
Default: 20
variantDonutWidth
This allows you to set how wide the donut is. It can be useful when nesting donuts.
Default: null
highlightStyle
Can be either
2d
, 3d
, outline
, invert
or a function and determines which style of segment highlighting is used in conjunction with tooltips. If it's a function the function is called and no highlighting is done - ie you should do it all yourself. As of version 5.23 you can also set this to invert
. If you do this on a dark background you may find that you need to change the highlight colors setting as well.Default: 2d
highlightStyleOutlineWidth
When outline highlighting for tooltips is used, this controls the width of the highlighting band.
Default: 10
highlightStyleTwodFill
When 2D highlighting for tooltips is used, this controls the color of the highlighting. The former name for this property was
highlightStyleTwodColor
.Default: rgba(255,255,255,0.5)
highlightStyleTwodStroke
When 2D highlighting for tooltips is used, this controls the stroke color of the highlighting.
Default: rgba(255,255,255,0)
highlightStyleTwodLinewidth
When 2D highlighting for tooltips is used, this controls the linewidth of the highlighting stroke.
Default: 1
exploded
This can either be an array with the same number of elements as segments, or a single number, in which case every segment will be exploded that amount. If it's an array then only those segments will be exploded - eg
[0,5,0,0]
Default: An empty array
centerpin
By using a centerpin you can add a circle to the center of your charts. This setting should be a number and is used as the radius of the centerpin.
Default: null
centerpinStroke
This is used as the stroke style of the centerpin.
Default: null
centerpinFill
This is used as the fill style of the centerpin.
Default: null
clearto
This is used in animations and effects as the default color to use when the canvas.
Default: null
Methods
obj.get(name)An accessor that you can use to retrieve the values of properties.
obj.set(name, value)
An accessor that you can use to set the values of properties.
obj.getShape(event)
This method makes it easy to get hold of which segment has been clicked on or hovered over. It returns an object which has the following indexes available:
object |
The chart object |
x |
This is the center X coordinate for the segment. |
y |
This is the center Y coordinate for the segment. |
radius |
This is the radius of the segment. |
angleStart |
This is the start angle of the segment. It's measured in radians - not degrees. 1 radian = 57.29 degrees. |
angleEnd |
This is the end angle of the segment. It's measured in radians - not degrees. 1 radian = 57.29 degrees. |
dataset |
Since Pie charts can only have one dataset this is always zero. |
index |
The zero-indexed index of the segment on the chart. |
sequentialIndex |
The sequentialIndex is the zero-indexed sequential index of the point on the
chart. Since , with Pie charts, there's only ever a single dataset this is always the
same as the index value.
|
tooltip |
If a tooltip is associated with this segment this will be it. id:
strings are expanded for you (where the tooltip text is retrieved from the HTML
tag with the matching ID).
|
<script> pie.canvas.onclick = function (e) { RGraph.redraw(); var canvas = e.target, obj = canvas.__object__, shape = obj.getShape(e); if (shape) { var x = shape.x, y = shape.y, radius = shape.radius, start = shape.angleStart, end = shape.angleEnd; obj.path( 'b m % % a % % % % % false c s black f red', x, y, x, y, radius, start, end ); } } </script>
obj.explode(index, size)
The explode()
function allows you to programmatically
trigger the exploding (ie the highlighting of) a particular segment.
The explode()
method is used like so:
<script>
pie = new RGraph.Pie({
id: 'cvs',
data: [8,9,4,6]
}).draw();
pie.explode(index, size);
</script>
The index argument is the zero-indexed segment to operate on (counting from the north axis). And the size is measured in pixels.
obj.getAngle(value)
This method can be used to get an appropriate angle for a value using the "scale" of the Pie chart. So if your Pie chart is showing values that go from 0-100 and your requested value is 50, this method will return an angle for the bottom of the Pie chart (ie half way around).
obj.on(event, function)
This method can be used to set an event listener on an object. It
operates in a similar way to the jQuery on()
function.
The first argument is the event that you wish to attach to and the second
is the handler function. For example:
.on('draw', function (obj)
{
// Put your event code here
});
The function is useful if you use method chaining when creating your charts:
new RGraph.Pie({ id: 'cvs', data: [4,5,3,8,6,3] }).on('draw', function (obj) // Put your draw event code here }).on('click', function (e, shape) { // Put your click event code here }).draw()
obj.exec(function)
The exec function is documented here.
Custom RGraph events that are available
Custom RGraph events are events that RGraph fires when certain actions occur. There is a more comprehensive list of these events here . Here's some example code that show you how to add these events to your chart.
- click
- mousemove
- mouseover
- mouseout
There's more documentation about events available here: Summary of events documentation
<script>
pie = new RGraph.Pie({
id: 'cvs',
data: [4,6,2,4,8,5,8],
options: {
}
}).draw().on('click', function (e, shape)
{
// Add your click event listener code here
}).on('mousemove', function (e, shape)
{
// Add your mousemove event listener code here
}).on('mouseover', function (e, shape)
{
// Add your mouseover event listener code here
}).on('mouseout', function (obj)
{
// Add your mouseout event listener code here
});
</script>
The Horseshoe Meter
Prior to version 5.02 it was possible to get this type of meter but it involved a lot of code (which you could always have put in a library file).
But now there's a dedicated class for it so it becomes an awful lot easier to create these types of charts. The code looks like this:
<script> new RGraph.HorseshoeMeter({ id: 'cvs_horseshoe', min: 0, max: 100, value: 65, options: { // textSize // textFont // textColor // textBold // textItalic // colors (can be an array of one or two colors) // centerx // centery // radius // marginLeft // marginRight // marginBottom // marginTop // label // labelUnitsPre labelUnitsPost: '%' // labelPoint // labelThousand // labelDecimals // capRadius // capStroke // capFill } }).roundRobin(); </script>
The Segmented Meter
Prior to version 5.2 it was possible to get this type of meter (there was a demo for it available in the demos folder) but it involved a lot of code so now there's a specialised class for it. The demo for it has been updated with the new code.
So it becomes an awful lot easier to create these types of charts. The code looks like this:
<script>
segmented = new RGraph.SegmentedMeter({
id: 'cvs_segmented',
max: 100,
value: 70,
options: {
//backgroundColor: 'black',
//value: true,
//valuePercentage: false,
//valueUnitsPre: '',
//valueDecimals: 1,
//valueBold: null,
//valueItalic: null,
//valueFont: null,
//colors: ['red','white']
//variantDonutWidth: null,
valueUnitsPost: '%',
valueColor: '#aaa',
valueSize: 50
}
}).roundRobin({frames: 60});
</script>
The Activity Meter
Prior to version 5.2 it was possible to get this type of meter (there was a demo for it available in the demos folder) but it involved a lot of code so now there's a specialised class for it. The demo for has been updated with the new code.
So it becomes an awful lot easier to create these types of charts. The code looks like this:
<script>
// The definitions of the rings, their values, colors and radius.
activity = new RGraph.ActivityMeter({
id: 'cvs_activity',
config: [
{color: '#2B908F', value: 67, image: '/images/activityMeter-arrowright.png' , _label_: 'A' }, // You can have either a label or an image
{color: '#90EE7E', value: 57, image: '/images/activityMeter-arrowup.png' , _label_: 'B' }, // You can have either a label or an image
{color: '#F45B5B', value: 46, image: '/images/activityMeter-arrowdown.png', _label_: 'C' } // You can have either a label or an image
],
options: {
variantDonutWidth: 30,
marginTop: 5,
marginBottom: 5,
marginLeft: 5,
marginRight: 5,
labelColor: 'black',
labelFont: 'Monospace',
labelSize: 28,
labelBold: true,
labelItalic: true
}
}).draw();
</script>
The RadialProgress Meter
The RadialProgress uses a combination of the Pie and Rose charts in order to produce the
visualisation. There's a demo in the download called pie-progress.html
which
demonstrates the chart (as shown here) and all of the options that are available to you.
<script>
new RGraph.RadialProgress({
id: 'cvs_radialprogress',
max: 100,
data: [28,19,39,45],
options: {
colors: ['red'],
margin: 25,
labels: ['Ray','Jill','Fran','Holly'],
labelsBold: true,
labelsItalic: true,
tooltips: ['Result: %{key}'],
tooltipsCss: {
fontSize: '20pt',
color: 'white',
backgroundColor: 'black',
textAlign: 'left'
},
tooltipsPointer: true,
tooltipsFormattedKeyLabels: ['Jenny','Richard','Dave','Kev']
}
}).grow();
</script>
Animation effects
These effects are available and can be used instead of thedraw()
function. There are also generic effects available which
you can see here: Generic effects and transitions
- The Grow effect (effects-pie-grow.html in the download archive)
- The Explode effect (effects-pie-explode.html in the download archive)
- The RoundRobin effect (effects-pie-roundrobin.html in the download archive)
<script> /** * Optional callback function that's called when the effect is complete */ function myCallback (obj) { // ... } new RGraph.Pie({ id: 'cvs', data: [8,6,6,5,3,4,2], options: { } }).grow({frames: 60}, myCallback) // .implode({frames: 60}, myCallback) // .roundRobin({frames: 60}, myCallback) </script>