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DateTimeAxis  - AS3 Flex

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(Preview)
Packagemx.charts
Classpublic class DateTimeAxis
InheritanceDateTimeAxis Inheritance NumericAxis Inheritance AxisBase Inheritance EventDispatcher Inheritance Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The DateTimeAxis class maps time values evenly between a minimum and maximum value along a chart axis. It can plot values represented either as instances of the Date class, as numeric values representing the number of milliseconds since the epoch (midnight on January 1, 1970, GMT), or as String values when you provide a custom parsing function.

The DateTimeAxis chooses the most reasonable units to mark the axis by examining the range between the minimum and maximum values of the axis. The Axis chooses the largest unit that generates a reasonable number of labels for the given range. You can restrict the set of units the chart considers, or specify exactly which units it should use, by setting the labelUnits property.

You can specifiy the minimum and maximum values explicitly, or let the axis automatically determine them by examining the values being renderered in the chart. By default, the DateTimeAxis chooses the smallest possible range to contain all the values represented in the chart. Optionally, you can request that the minimum and maximum values be rounded to whole units (milliseconds, seconds, minutes, hours, days, weeks, months, years) by setting the autoAdjust property to true.

You can specify disabled days of a week and disabled ranges of dates in order to show only working days on the axis but not all days between minimum and maximum. It also filters data and shows only data corresponding to working days on the chart

MXML SyntaxexpandedHide MXML Syntax

The <mx:DateTimeAxis> tag inherits all the properties of its parent classes and adds the following properties:

  <mx:DateTimeAxis
    Properties
    alignLabelsToUnits="true|false"
    dataUnits="milliseconds|seconds|minutes|hours|days|weeks|months|years"
    disabledDays="Array; No default"
    disabledRanges="Array; No default"
    displayLocalTime="false"
    interval="Number"
    labelUnits="milliseconds|seconds|minutes|hours|days|weeks|months|years"
    maximum="Date"
    minimum="Date"
    minorTickInterval="Number"
    minorTickUnits="milliseconds|seconds|minutes|hours|days|weeks|months|years"
  />
  

View the examples

More examples

Related API Elements



Public Properties
 PropertyDefined By
  alignLabelsToUnits : Boolean
Determines the placement of labels along the axis.
DateTimeAxis
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
  dataInterval : Number
[write-only] Specifies the interval between data in your chart, specified in dataUnits.
DateTimeAxis
  dataUnits : String
Specifies the units that you expect the data in your chart to represent.
DateTimeAxis
  disabledDays : Array
The days to disable in a week.
DateTimeAxis
  disabledRanges : Array
Disables single and multiple days.
DateTimeAxis
  displayLocalTime : Boolean
When set to true, a DateTimeAxis considers all date values to be in the time zone of the client machine running the application.
DateTimeAxis
  interval : Number
Specifies the number of labelUnits between label values along the axis.
DateTimeAxis
  labelUnits : String
The units that the axis uses to generate labels.
DateTimeAxis
  maximum : Date
Specifies the maximum value for an axis label.
DateTimeAxis
  minimum : Date
Specifies the minimum value for an axis label.
DateTimeAxis
  minorTickInterval : Number
Specifies the number of minorTickUnits between minor tick marks along the axis.
DateTimeAxis
  minorTickUnits : String
The units that the Axis considers when generating minor tick marks.
DateTimeAxis
  parseFunction : Function
[override] Specifies a method that customizes the value of the data points.
DateTimeAxis
  unitSize : Number
[override] [read-only] The width, in pixels, of a single data unit.
DateTimeAxis
Protected Properties
 PropertyDefined By
  requiredDescribedFields : uint
[override] [read-only] The fields of the DescribeData structure that this axis is interested in.
DateTimeAxis
Public Methods
 MethodDefined By
  
Constructor.
DateTimeAxis
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.
EventDispatcher
 Inherited
Dispatches an event into the event flow.
EventDispatcher
  
filterCache(cache:Array, field:String, filteredField:String):void
[override] Filters a set of values of arbitrary type to a set of numbers that can be mapped.
DateTimeAxis
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
EventDispatcher
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
  
reduceLabels(intervalStart:AxisLabel, intervalEnd:AxisLabel):AxisLabelSet
[override] Invoked when an AxisRenderer is unable to cleanly render the labels without overlap, and would like the Axis object to reduce the set of labels.
DateTimeAxis
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
EventDispatcher
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
Returns the string representation of the specified object.
Object
  
transformCache(cache:Array, field:String, convertedField:String):void
[override] Maps a set of values from data space to screen space.
DateTimeAxis
 Inherited
Returns the primitive value of the specified object.
Object
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
EventDispatcher
Protected Methods
 MethodDefined By
  
[override] Builds an Array of positions for the minor tick marks Array that is generated by this axis.
DateTimeAxis
  
The default formatting function used when the axis renders with day-based labelUnits.
DateTimeAxis
  
The default formatting function used when the axis renders with millisecond-based labelUnits.
DateTimeAxis
  
The default formatting function used when the axis renders with minute-based labelUnits.
DateTimeAxis
  
The default formatting function used when the axis renders with month-based labelUnits.
DateTimeAxis
  
The default formatting function used when the axis renders with second-based labelUnits.
DateTimeAxis
  
The default formatting function used when the axis renders with year-based labelUnits.
DateTimeAxis
Events
 Event Summary Defined By
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.EventDispatcher
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.EventDispatcher
Property Detail
Constructor Detail
Method Detail
DateTimeAxisExample.mxml
<?xml version="1.0"?>
<!-- Simple example to demonstrate the DateTimeAxis class. -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:s="library://ns.adobe.com/flex/spark" 
    xmlns:mx="library://ns.adobe.com/flex/mx">

    <fx:Script>
        <![CDATA[

            import mx.collections.ArrayCollection;

            [Bindable] 
            public var stockDataAC:ArrayCollection = new ArrayCollection( [
                {date: "2005, 7, 27", close: 41.71},
                {date: "2005, 7, 28", close: 42.21},
                {date: "2005, 7, 29", close: 42.11},
                {date: "2005, 8, 1", close: 42.71},
                {date: "2005, 8, 2", close: 42.99},
                {date: "2005, 8, 3", close: 44} ]);
    
            public function myParseFunction(s:String):Date { 
                // Get an array of Strings from the comma-separated String passed in.
                var a:Array = s.split(",");
                // Create the new Date object. Subtract one from 
                // the month property because months are zero-based in 
                // the Date constructor.
                var newDate:Date = new Date(a[0],a[1]-1,a[2]);
                return newDate;
            }
        ]]>
    </fx:Script>

    <mx:Panel title="DateTimeAxis Example" height="100%" width="100%">
    
        <mx:LineChart id="mychart" height="100%" width="100%"
            paddingRight="5" paddingLeft="5" 
            showDataTips="true" dataProvider="{stockDataAC}">
            
            <mx:horizontalAxis>
                <mx:DateTimeAxis dataUnits="days" parseFunction="myParseFunction"/>
            </mx:horizontalAxis>

            <mx:verticalAxis>
                <mx:LinearAxis baseAtZero="false" />
            </mx:verticalAxis>

            <mx:series>
                <mx:LineSeries yField="close" xField="date" displayName="AAPL"/>
            </mx:series>
        </mx:LineChart>
        
    </mx:Panel>
</s:Application>