Gantt chart API reference
Documentation about the Gantt chart including information about all of the options that are available to you. The Gantt chart is commonly used to show scheduling information regarding timetables for people or events. There's a demo that shows an interactive Gantt chart.
- Example
- Properties
- Methods
- Adding events to your Gantt charts
- Adding vertical and horizontal bars to your Gantt chart
- Effects
Example
<script>
new RGraph.Gantt({
id: 'cvs',
data: [
{start: 31, duration: 28, complete: null, label: 'Richard', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 31, duration: 28, complete: null, label: 'Fred', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 59, duration: 14, complete: null, label: 'Barney', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 59, duration: 21, complete: null, label: 'Gloria', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 59, duration: 31, complete: null, label: 'Paul', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 80, duration: 21, complete: null, label: 'Harry', background: null, color: null border: 'rgba(0,0,0,0)'],
{start: 94, duration: 7, complete: null, label: 'Shane', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 120, duration: 14, complete: null, label: 'Barry', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 130, duration: 14, complete: null, label: 'Cynthia', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 211, duration: 61, complete: null, label: 'Graham', background: null, color: null, border: 'rgba(0,0,0,0)'],
{start: 334, duration: 31, complete: null, label: 'Paul', background: null, color: null, border: 'rgba(0,0,0,0)']
],
options: {
xaxisScaleMax: 365,
marginLeft: 75,
xaxisLabels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
title: 'Holiday schedule for Xyz Ltd',
colorsDefault: 'rgba(255,0,0,1)',
tooltips: [
"<b>Richard</b><br />Richard is going on holiday.<br />He'll be away for 28 days.",
"<b>Fred</b><br />Fred is also going away for 28 days",
"<b>Barney</b><br />Barney is off work for two weeks",
"<b>Gloria</b><br />Gloria is off work for 3 weeks",
"<b>Paul</b><br /> Away for 31 days",
"<b>Harry</b><br />Away for three weeks",
"<b>Shane</b><br />Away for one week",
"<b>Barry</b><br />Away for two weeks",
"<b>Cynthia</b><br />Away for two weeks",
"<b>Graham</b><br />Away for August and September",
"<b>Paul</b><br />Away for 31 days"
],
backgroundVbars: [
[0, 31, 'rgba(192,255,192,0.5)'],
[59, 31, 'rgba(192,255,192,0.5)'],
[120, 31, 'rgba(192,255,192,0.5)'],
[181, 31, 'rgba(192,255,192,0.5)'],
[243, 30, 'rgba(192,255,192,0.5)'],
[304, 30, 'rgba(192,255,192,0.5)']
]
}
}).draw();
</script>
Properties
You can use these properties to control how the chart appears. You can set them by including them in the options section of the configuration as above.
- Background properties
- X axis properties
- Y axis properties
- Other axis properties
- Color properties
- Margin properties
- Labels and text properties
- Title properties
- Interactive features properties
- Event properties
- Miscellaneous properties
Background properties
X axis properties
Y axis properties
Color properties
| Property | Description | Default |
|---|---|---|
| colorsDefault | The default color of bars. If you don't specify a color for the event, this will be used. | white |
Margin properties
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). | false |
| textSize | The size of the text (in points). | 12 |
| textFont | The font used to render the text. | Arial, Verdana, sans-serif |
| textColor | The color of the labels. | black |
| textBold | Whether the text on the chart is bold or not. | false |
| textItalic | Whether the text on the chart is italic or not. | false |
| labelsInbar | An array of labels that are drawn inside the Gantt chart bars. These labels can also be drawn on the right of these bars. | null |
| labelsInbarAlign | This controls whether the labels are aligned left, center or right when the labels are drawn inside the bars. | left |
| labelsInbarBgcolor | The background color for the text. By default there's no background to the text. | null |
| labelsInbarColor | The color of the labels. | null |
| labelsInbarFont | The font used to draw the labels. | null |
| labelsInbarSize | The size of the text labels. | null |
| labelsInbarBold | Whether the inbar labels are bold or not. | null |
| labelsInbarItalic | Whether the inbar labels are italic or not. | null |
| labelsInbarAbove | If you prefer, the labels can be drawn "above" the bars (actually to the right but for API compatibility it's called "above"). | false |
| labelsComplete | This allows you to turn off the "percent complete" indicator if you want to. | true |
| labelsCompleteFont | The font used to render the percent-complete number. | null |
| labelsCompleteSize | The size of the text. | null |
| labelsCompleteColor | The color of the text. | null |
| labelsCompleteBold | Whether the text is bold or not. | null |
| labelsCompleteItalic | Whether the text is italic or not. | null |
Title properties
Interactive features properties
| Property | Description | Default |
|---|---|---|
| tooltips | An array of tooltips that are shown when the bars are clicked. They can contain HTML. | (An empty array) |
| tooltipsEvent | This is the event that triggers the tooltips. It can be either onclick or onmousemove. | onclick |
| tooltipsEffect | The effect used for showing tooltips. Can be either fade or none. | fade |
| tooltipsCssClass | This is the name of the CSS class the chart uses. | RGraph_tooltip |
| 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 |
| contextmenu | An array of context menu items. Cannot be used in conjunction with tooltips. | (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 colour allowed for annotations. | black |
| annotatableLinewidth | This is the line width of the annotations. | 1 |
| resizable | Defaulting to false, this determines whether your chart will be resizable. Because of the numerous event handlers this has to install code on, This feature is unlikely to work with other dynamic features (the context menu is fine however). | false |
| resizableHandleBackground | With this you can specify the background color for the resize handle. If you're adjusting the position of the handle then you may need this to make the handle stand out more. | null |
| resizableMinwidth | This allows you to set a minimum width that the chart can be resized to. | null |
| resizableMinheight | This allows you to set a minimum height that the chart can be resized to. | null |
| resizableMaxwidth | This allows you to set a maximum width that the chart can be resized to. | null |
| resizableMaxheight | This allows you to set a maximum height that the chart can be resized to. | null |
| adjustable | Defaulting to false, this determines whether your bar chart will be adjustable. | false |
| adjustableOnly | This should be an array of values that determine whether a Bar is adjustable or not. A truthy value for when it is, a falsey value for when it's not. | null |
Event properties
| Property | Description | Default |
|---|---|---|
| eventsClick | If you want to add your own onclick function you can do so by assigning it to this property. See here for details. | null |
| eventsMousemove | If you want to add your own onmousemove function you can do so by assigning it to this property. See here for details. | null |
| eventsMouseover | If you want to add your own onmouseover function you can do so by assigning it to this property. See here for details. | null |
| eventsMouseout | If you want to add your own onmouseout function you can do so by assigning it to this property. See here for details. | null |
Miscellaneous properties
Methods
obj.get(name)An accessor function 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 returns the details of a focused bar (ie clicked or hovered over). It returns:
- The chart object
- The X coordinate
- The Y coordinate
- The width of the bar
- The height of the bar
- The index of the bar (starting from 0)
The shape also includes textual indexes like this: shape['object'] And they are:
- object
- x
- y
- width
- height
- tooltip
- index
This method can be used to get an appropriate X coordinate for a value when you're doing custom drawing on the chart. It returns null if the value is out of range.
obj.getValue(mixed)This method can be used to get the value when the chart has been clicked on. The argument is the event object. You can also use this method outside of an event listener by giving the function an array as the argument containing the X/Y coordinates.
obj.canvas.onclick = function (e)
{
var obj = e.target.__object__;
var value = obj.getValue(e);
// ...
}
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 you wish to attach to and the second
is the handler function. For example:
.on('draw', function (obj)
{
// Put event code here
});
The exec option and method
The exec function is documented here.
Adding events (the information represented on the chart) to your Gantt chart
To add events (the information represented on the chart), you now specify them as an argument to the constructor - it's no longer the events property.
myGantt = new RGraph.Gantt({
id: 'cvs',
data: [
{start: 31, duration: 28, complete: 75, label: 'Richard'},
{start: 12, duration: 28, complete: 67, label: 'Fred'},
{start: 59, duration: 14, complete: 0, label: 'Barney'},
{start: 59, duration: 21, complete: 5, label: 'Gloria'},
{start: 46, duration: 31, complete: 94, label: 'Paul'}]
{start: 80, duration: 21, complete: 46, label: 'Harry'},
{start: 94, duration: 17, complete: 84, label: 'Shane'},
{start: 34, duration: 14, complete: 32, label: 'Barry'},
{start: 64, duration: 14, complete: 28, label: 'Cynthia', background: 'red', color: 'yellow'},
{start: 13, duration: 61, complete: 74, label: 'Graham'},
{start: 84, duration: 31, complete: 16, label: 'Paul'}
],
options: {
}
);
The start value is the (zero indexed) start number relative to your
xaxisScaleMax value. So if you have set your
xaxisScaleMax to 62, (to represent
two months), and this value is 31, the start will be the start of the
second month. In this case you could give two labels -
['July', 'August'].
The duration value is the duration. So using the previous example, if you set this to 7, you would have an event lasting a week.
The complete value is the "percentage complete" indicator. This is
shown to the right of the event and is optional - you can
specify null if you wish.
The label value is the label that is used on the left hand side.
The optional background value stipulates the background colour that the bar is. The default is white.
The optional color value is the foreground color of the bar. This defaults to #0c0.
The optional border value is the border colour, defaulting to black
And the optional linewidth value is the numerical linewidth of the border. The default for this is 1.
Adding vertical and horizontal bars to your Gantt chart
You can add decorative vertical or horizontal bars like so:
...
vbars: [
[0, 31, 'rgba(192,255,192,0.5)'],
[59, 31, 'rgba(192,255,192,0.5)'],
[120, 31, 'rgba(192,255,192,0.5)'],
[181, 31, 'rgba(192,255,192,0.5)'],
[243, 30, 'rgba(192,255,192,0.5)'],
[304, 30, 'rgba(192,255,192,0.5)'],
],
hbars: [,'red',,,,'green'],
...
You can use these for decorative purposes, or to mark events/limits. For the vertical bars the first value is the start index, the same as above. The second value is the unit length, again, the same as above. The third value is the colour of the vertical bar.
And for the horizontal bars you just specify the colour of the bar - they automatically extend across the entire Gantt chart area. If you don't specify a colour (as is demonstrated above) then there won't be a bar for that entry.
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 (examples/effects-gantt-grow.html)
<script>
/**
* Optional callback function that's called when the effect is complete
*/
function myCallback (obj)
{
// ...
}
var obj = new RGraph.Gantt({
id: 'cvs',
data: [
{start: 0, duration: 30},
{start: 30, duration: 60},
{start: 60, duration: 90}
],
options: {
marginLeft: 35,
xaxisScaleMax: 90
}
}).grow({frames: 60}, myCallback)
</script>