LogAxis

Paket	mx.charts
Klass	public class LogAxis
Arv	LogAxis NumericAxis AxisBase EventDispatcher Object

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

The LogAxis class maps numeric values logarithmically between a minimum and maximum value along a chart axis. By default, it determines minimum, maximum, and interval values from the charting data to fit all of the chart elements on the screen. You can also explicitly set specific values for these properties. A LogAxis object cannot correctly render negative values, as Log10() of a negative number is undefined.

MXML-syntax expanded

Dölj MXML-syntax

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

  <mx:LogAxis
    Properties
    interval="10"
    maximum="null"
    maximumLabelPrecision="null"
    minimum="null"
  />

Visa exemplen

Fler exempel

About the axis classes
About the LogAxis subclass
Adding axis titles
Defining axis labels

Relaterade API-element

mx.charts.chartClasses.IAxis

Publika egenskaper

Dölj ärvda publika egenskaper

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	Egenskap		Definieras med
		autoAdjust : Boolean Specifies whether Flex rounds values.	NumericAxis
		baseAtZero : Boolean Specifies whether Flex tries to keep the minimum and maximum values rooted at zero.	NumericAxis
		baseline : Number [skrivskyddad] The computed minimum value for the axis as long as this value is greater than 0.	NumericAxis
		chartDataProvider : Object [lässkyddad] The data provider assigned to the enclosing chart.	AxisBase
		computedMaximum : Number The computed maximum value represented by this axis.	NumericAxis
		computedMinimum : Number The computed minimum value represented by this axis.	NumericAxis
		constructor : Object En referens till klassobjektet eller konstruktorfunktionen för en given objektinstans.	Object
		direction : String Determines the direction in which the axis is rendered.	NumericAxis
		displayName : String The name of the axis.	AxisBase
		interval : Number Specifies the multiplier label values along the axis.	LogAxis
		labelFunction : Function Called to format axis values for display as labels.	NumericAxis
		maximum : Number Specifies the maximum value for an axis label.	LogAxis
		maximumLabelPrecision : Number Specifies the maximum number of decimal places for representing fractional values on the labels generated by this axis.	LogAxis
		minimum : Number Specifies the minimum value for an axis label.	LogAxis
		minorTicks : Array [skrivskyddad] An Array of minor tick marks generated to represent this axis.	NumericAxis
		padding : Number Specifies padding that Flex adds to the calculated minimum and maximum values for the axis when rendering the values on the screen.	NumericAxis
		parseFunction : Function Specify a parseFunction to customize how the values rendered by your chart are converted into numeric values.	NumericAxis
		title : String The text for the title displayed along the axis.	AxisBase
		unitSize : Number [skrivskyddad] The size of one unit of data as represented by this axis.	AxisBase

Skyddade egenskaper

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	Egenskap		Definieras med
		assignedMaximum : Number The explicitly assigned maximum value.	NumericAxis
		assignedMinimum : Number The explicitly assigned minimum value.	NumericAxis
		computedInterval : Number The computed interval represented by this axis.	NumericAxis
		dataDescriptions : Array [skrivskyddad] An Array of DataDescription structures describing the data being represented by the chart.	NumericAxis
		labelCache : Array The most recent set of AxisLabel objects generated to represent this axis.	NumericAxis
		labelMaximum : Number The maximum value where a label should be placed.	NumericAxis
		labelMinimum : Number The minimum value where a label should be placed.	NumericAxis
		minorTickCache : Array The most recent set of minor tick marks generated to represent this axis.	NumericAxis
		requiredDescribedFields : uint [skrivskyddad] The fields of the DescribeData structure that this axis is interested in.	NumericAxis
		ticks : Array [skrivskyddad] An Array of tick marks for this axis.	NumericAxis

Publika metoder

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	Metod		Definieras med
		LogAxis() Constructor.	LogAxis
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registrerar ett händelseavlyssnarobjekt för ett EventDispatcher-objekt så att avlyssnaren får meddelanden om händelser.	EventDispatcher
		dataChanged():void Triggers events that inform the range object when the chart data has changed.	AxisBase
		dispatchEvent(event:Event):Boolean Skickar en händelse till händelseflödet.	EventDispatcher
		filterCache(cache:Array, field:String, filteredField:String):void Filters a set of values of arbitrary type to a set of numbers that can be mapped.	NumericAxis
		formatForScreen(value:Object):String Formats values for display in DataTips.	NumericAxis
		getLabelEstimate():AxisLabelSet Determines the range to estimate what the axis labels should be.	NumericAxis
		getLabels(minimumAxisLength:Number):AxisLabelSet Gets the labels text that is rendered.	NumericAxis
		hasEventListener(type:String):Boolean Kontrollerar om EventDispatcher-objektet har några avlyssnare registrerade för en viss typ av händelse.	EventDispatcher
		hasOwnProperty(name:String):Boolean Anger om det finns en egenskap angiven för ett objekt.	Object
		invertTransform(value:Number):Object Maps a position along the axis back to a numeric data value.	NumericAxis
		isPrototypeOf(theClass:Object):Boolean Anger om en instans av klassen Object finns i prototypkedjan för objektet som anges som parameter.	Object
		mapCache(cache:Array, field:String, convertedField:String, indexValues:Boolean = false):void Converts a set of values of arbitrary type to a set of numbers that can be transformed into screen coordinates.	NumericAxis
		preferDropLabels():Boolean Determines how the axis handles overlapping labels.	NumericAxis
		propertyIsEnumerable(name:String):Boolean Anger om den angivna egenskapen finns och är uppräkningsbar.	Object
		reduceLabels(intervalStart:AxisLabel, intervalEnd:AxisLabel):AxisLabelSet 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.	NumericAxis
		registerDataTransform(transform:mx.charts.chartClasses:DataTransform, dimensionName:String):void Each DataTransform that makes use of an axis registers itself with that axis.	AxisBase
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Tar bort en avlyssnare från EventDispatcher-objektet.	EventDispatcher
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Anger tillgänglighet för en dynamisk egenskap för slingåtgärder.	Object
		toLocaleString():String Returnerar det här objektets strängrepresentation, formaterad i enlighet med språkspecifika konventioner.	Object
		toString():String Returnerar det angivna objektets strängbeteckning.	Object
		transformCache(cache:Array, field:String, convertedField:String):void Maps a set of values from data space to screen space.	NumericAxis
		unregisterDataTransform(transform:mx.charts.chartClasses:DataTransform):void Each DataTransform that makes use of an axis registers itself with that axis.	AxisBase
		update():void Updates the chart.	NumericAxis
		valueOf():Object Returnerar det angivna objektets primitiva värde.	Object
		willTrigger(type:String):Boolean Kontrollerar om en händelseavlyssnare är registrerad för det här EventDispatcher-objektet eller något av dess överordnade objekt för den angivna händelsetypen.	EventDispatcher

Skyddade metoder

Dölj ärvda skyddade metoder

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	Metod		Definieras med
		adjustMinMax(minValue:Number, maxValue:Number):void Adjusts the generated or assigned range of the axis's labels.	NumericAxis
		buildLabelCache():Boolean Populates the labelCache property with labels representing the current values of the axis.	NumericAxis
		buildMinorTickCache():Array Builds an Array of positions for the minor tick marks Array that is generated by this axis.	NumericAxis
		describeData(requiredFields:uint):Array Called by the governing DataTransform to obtain a description of the data represented by this IChartElement.	AxisBase
		guardMinMax(min:Number, max:Number):Array Protects the range against invalid values for this axis type.	NumericAxis
		invalidateCache():void Invalidates the cached labels and tick marks that represent this axis's values.	NumericAxis

Händelser

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	Händelse		Sammanfattning	Definieras med
		activate	[utsändningshändelse] Skickas när Flash Player eller AIR får operativsystemfokus och blir aktivt.	EventDispatcher
		deactivate	[utsändningshändelse] Skickas när Flash Player eller AIR förlorar operativsystemfokus och blir inaktivt.	EventDispatcher

Egenskapsdetaljer

interval

egenskap

interval:Number

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Specifies the multiplier label values along the axis. A value of 10 generates labels at 1, 10, 100, 1000, etc., while a value of 100 generates labels at 1, 100, 10000, etc. Flex calculates the interval if this property is set to NaN. Intervals must be even powers of 10, and must be greater than or equal to 10. The LogAxis rounds the interval down to an even power of 10, if necessary.

Standardvärdet är 10.

Implementering
public function get interval():Number
public function set interval(value:Number):void

maximum

egenskap

maximum:Number

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Specifies the maximum value for an axis label. If NaN, Flex determines the maximum value from the data in the chart. The maximum value must be an even power of 10. The LogAxis rounds an explicit maximum value up to an even power of 10, if necessary.

Standardvärdet är NaN.

Implementering
public function get maximum():Number
public function set maximum(value:Number):void

maximumLabelPrecision

egenskap

maximumLabelPrecision:Number

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Specifies the maximum number of decimal places for representing fractional values on the labels generated by this axis. By default, the Axis autogenerates this value from the labels themselves. A value of 0 round to the nearest integer value, while a value of 2 rounds to the nearest 1/100th of a value.

Implementering
public function get maximumLabelPrecision():Number
public function set maximumLabelPrecision(value:Number):void

minimum

egenskap

minimum:Number

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Specifies the minimum value for an axis label. If NaN, Flex determines the minimum value from the data in the chart. The minimum value must be an even power of 10. The LogAxis will round an explicit minimum value downward to an even power of 10 if necessary.

Standardvärdet är NaN.

Implementering
public function get minimum():Number
public function set minimum(value:Number):void

Konstruktordetaljer

()

Konstruktor

public function LogAxis()

Språkversion:

ActionScript 3.0

Produktversion:

Flex 3

Körningsmiljöversioner:

Flash Player 9, AIR 1.1

Constructor.

Exempel Så här använder du exemplet

LogAxisExample.mxml

<?xml version="1.0"?>
<!-- Simple example to demonstrate the LogAxis 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]
        private var expensesAC:ArrayCollection = new ArrayCollection( [
            { Month: "Jan", Profit: 20000, Expenses: 1500, Amount: 450 },
            { Month: "Feb", Profit: 1000, Expenses: 15000, Amount: 600 },
            { Month: "Mar", Profit: 15000, Expenses: 5000, Amount: 300 },
            { Month: "Apr", Profit: 1800, Expenses: 1200, Amount: 900 },
            { Month: "May", Profit: 2400, Expenses: 575, Amount: 500 } ]);
        ]]>
    </fx:Script>

    <mx:Panel title="LogAxis Example" height="100%" width="100%">

        <mx:LineChart id="linechart" height="100%" width="100%"
            paddingLeft="5" paddingRight="5" 
            showDataTips="true" dataProvider="{expensesAC}">
                
            <mx:horizontalAxis>
                <mx:CategoryAxis categoryField="Month"/>
            </mx:horizontalAxis>
                
            <mx:verticalAxis>
                <mx:LogAxis interval="10"/>
            </mx:verticalAxis>
                
            <mx:series>
                <mx:LineSeries yField="Profit" form="curve" displayName="Profit"/>
                <mx:LineSeries yField="Expenses" form="curve" displayName="Expenses"/>
                <mx:LineSeries yField="Amount" form="curve" displayName="Amount"/>
            </mx:series>
        </mx:LineChart>

        <mx:Legend dataProvider="{linechart}"/>

    </mx:Panel>
</s:Application>

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LogAxis - AS3 Flex

Paketx

Språkelement

Bilagor

Paket mx.charts

interval

maximum

maximumLabelPrecision

minimum

LogAxis