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class Label

package feathers.controls

extends FeathersControl › MeasureSprite › ValidatingSprite

implements ITextControl

@:directlyUsed@:build(feathers.macros.StyleMacro.build())@:autoBuild(feathers.macros.StyleMacro.build())@:build(feathers.macros.StyleContextMacro.build())@:autoBuild(feathers.macros.StyleContextMacro.build())@:styleContext

Displays text with an optional background.

The following example creates a label and gives it text:

var label = new Label();
label.text = "Hello World";
this.addChild(label);
Available since

1.0.0

.

See:

Tutorial: How to use the Label component

Constructor

new ()

Creates a new Label object.

Available since

1.0.0

.

Variables

@:value(null)@:stylebackgroundSkin:DisplayObject = null

The default background skin to display behind the label's text.

The following example passes a bitmap for the label to use as a background skin:

label.backgroundSkin = new Bitmap(bitmapData);
Available since

1.0.0

.

See:

Label.disabledBackgroundSkin

@:value(null)@:styledisabledBackgroundSkin:DisplayObject = null

A background skin to display behind the label's text when the label is disabled.

The following example gives the label a disabled background skin:

label.disabledBackgroundSkin = new Bitmap(bitmapData);
label.enabled = false;
Available since

1.0.0

.

See:

Label.backgroundSkin

@:value(null)@:styledisabledTextFormat:TextFormat = null

The font styles used to render the label's text when the label is disabled.

In the following example, the label's disabled text formatting is customized:

label.enabled = false;
label.disabledTextFormat = new TextFormat("Helvetica", 20, 0xee0000);
Available since

1.0.0

.

See:

Label.textFormat

@:value(0.0)@:stylepaddingBottom:Float = 0.0

The minimum space, in pixels, between the button's bottom edge and the button's content.

In the following example, the button's bottom padding is set to 20 pixels:

button.paddingBottom = 20.0;
Available since

1.0.0

.

@:value(0.0)@:stylepaddingLeft:Float = 0.0

The minimum space, in pixels, between the button's left edge and the button's content.

In the following example, the button's left padding is set to 20 pixels:

button.paddingLeft = 20.0;
Available since

1.0.0

.

@:value(0.0)@:stylepaddingRight:Float = 0.0

The minimum space, in pixels, between the button's right edge and the button's content.

In the following example, the button's right padding is set to 20 pixels:

button.paddingRight = 20.0;
Available since

1.0.0

.

@:value(0.0)@:stylepaddingTop:Float = 0.0

The minimum space, in pixels, between the button's top edge and the button's content.

In the following example, the button's top padding is set to 20 pixels:

button.paddingTop = 20.0;
Available since

1.0.0

.

@:value("")@:isVartext:String = ""

The text displayed by the label.

The following example sets the label's text:

label.text = "Good afternoon!";
Available since

1.0.0

.

See:

Label.textFormat

@:value(null)@:styletextFormat:TextFormat = null

The font styles used to render the label's text.

In the following example, the label's text formatting is customized:

label.textFormat = new TextFormat("Helvetica", 20, 0xcc0000);
Available since

1.0.0

.

See:

Label.text

Label.disabledTextFormat

@:value(MIDDLE)@:styleverticalAlign:VerticalAlign = MIDDLE

How the content is positioned vertically (along the y-axis) within the button.

The following example aligns the button's content to the top:

button.verticalAlign = TOP;

Note: The VerticalAlign.JUSTIFY constant is not supported by this component.

See:

feathers.layout.VerticalAlign.TOP

feathers.layout.VerticalAlign.MIDDLE

feathers.layout.VerticalAlign.BOTTOM

@:value(false)@:stylewordWrap:Bool = false

Determines if the text is displayed on a single line, or if it wraps.

In the following example, the label's text wraps at 150 pixels:

label.width = 150.0;
label.wordWrap = true;
Available since

1.0.0

.

Static variables

@:value("detail")staticread onlyVARIANT_DETAIL:String = "detail"

A variant used to style the label using a smaller text format for details. Variants allow themes to provide an assortment of different appearances for the same type of UI component.

The following example uses this variant:

var label = new Label();
label.variant = Label.VARIANT_DETAIL;
Available since

1.0.0

.

See:

Feathers UI User Manual: Themes

@:value("heading")staticread onlyVARIANT_HEADING:String = "heading"

A variant used to style the label using a Larger text format for headings. Variants allow themes to provide an assortment of different appearances for the same type of UI component.

The following example uses this variant:

var label = new Label();
label.variant = Label.VARIANT_HEADING;
Available since

1.0.0

.

See:

Feathers UI User Manual: Themes

Inherited Variables

Defined by FeathersControl

@:value(false)read onlycreated:Bool = false

Determines if the component has been initialized and validated for the first time.

In the following example, we check if the component is created or not, and we listen for an event if it isn't:

if(!control.created)
{
	control.addEventListener(FeathersEventType.CREATION_COMPLETE, creationCompleteHandler);
}

See:

FeathersEvent.CREATION_COMPLETE

FeathersControl.update()

@:value(true)@:isVarenabled:Bool = true

See:

feathers.core.IUIControl.enabled

@:value(true)includeInLayout:Bool = true

See:

feathers.layout.ILayoutObject.includeInLayout

@:value(false)read onlyinitialized:Bool = false

Determines if the component has been initialized yet. The initialize() function is called one time only, when the Feathers UI control is added to the display list for the first time.

In the following example, we check if the component is initialized or not, and we listen for an event if it isn't initialized:

if(!control.initialized)
{
	control.addEventListener(FeathersEvent.INITIALIZE, initializeHandler);
}
Available since

1.0.0

.

See:

FeathersEvent.INITIALIZE

FeathersControl.initialize()

@:value(null)@stylelayoutData:ILayoutData = null

See:

feathers.layout.ILayoutObject.layoutData

read onlystyleContext:Class<IStyleObject>

The class used as the context for styling the component. If a subclass of a component should have different styles than its superclass, it should override the get_styleContext getter. However, if a subclass should continue using the same styles as its superclass, it happens automatically.

Available since

1.0.0

.

styleProvider:IStyleProvider

When a component initializes, a style provider may be used to set properties that affect the component's visual appearance.

You can set or replace an existing style provider at any time before a component initializes without immediately affecting the component's visual appearance. After the component initializes, the style provider may still be changed, and any properties that were set by the previous style provider will be reset to their default values before applying the new style provider.

Available since

1.0.0

.

See:

FeathersControl.variant

Introduction to Feathers UI themes

@:value(null)variant:String = null

May be used to provide multiple different variations of the same UI component, each with a different appearance.

Available since

1.0.0

.

Defined by MeasureSprite

@:value(null)@:isVarexplicitHeight:Null<Float> = null

See:

feathers.core.IMeasureObject.explicitHeight

@:value(null)@:isVarexplicitMaxHeight:Null<Float> = null

See:

feathers.core.IMeasureObject.explicitMaxHeight

@:value(null)@:isVarexplicitMaxWidth:Null<Float> = null

See:

feathers.core.IMeasureObject.explicitMaxWidth

@:value(null)@:isVarexplicitMinHeight:Null<Float> = null

See:

feathers.core.IMeasureObject.explicitMinHeight

@:value(null)@:isVarexplicitMinWidth:Null<Float> = null

See:

feathers.core.IMeasureObject.explicitMinWidth

@:value(null)@:isVarexplicitWidth:Null<Float> = null

See:

feathers.core.IMeasureObject.explicitWidth

maxHeight:Float

See:

feathers.core.IMeasureObject.maxHeight

maxWidth:Float

See:

feathers.core.IMeasureObject.maxWidth

minHeight:Float

See:

feathers.core.IMeasureObject.minHeight

minWidth:Float

See:

feathers.core.IMeasureObject.minWidth

Defined by ValidatingSprite

@:value(-1)read onlydepth:Int = -1

See:

feathers.core.IValidating.depth

Inherited Methods

Defined by FeathersControl

private@:dox(show)initialize ():Void

Called the first time that the UI control is added to the stage, and you should override this function to customize the initialization process. Do things like create children and set up event listeners. After this function is called, Event.INIT is dispatched.

The following example overrides initialization:

override private function initialize():Void {
	super.initialize();

}
Available since

1.0.0

.

initializeNow ():Void

See:

feathers.core.IUIControl.initializeNow

move (x:Float, y:Float):Void

Sets both the x and y positions of the control in a single function call.

Available since

1.0.0

.

See:

DisplayObject.x

DisplayObject.y

setSize (width:Float, height:Float):Void

Sets both the width and height dimensions of the control in a single function call.

Available since

1.0.0

.

See:

DisplayObject.width

DisplayObject.height

private@:dox(show)setStyle (styleName:String, ?state:EnumValue):Bool

Determines if a style may be changed, and restricts the style from being changed in the future, if necessary.

Available since

1.0.0

.

Defined by MeasureSprite

resetHeight ():Void

See:

feathers.core.IMeasureObject.resetHeight

resetMaxHeight ():Void

See:

feathers.core.IMeasureObject.resetMaxHeight

resetMaxWidth ():Void

See:

feathers.core.IMeasureObject.resetMaxWidth

resetMinHeight ():Void

See:

feathers.core.IMeasureObject.resetMinHeight

resetMinWidth ():Void

See:

feathers.core.IMeasureObject.resetMinWidth

resetWidth ():Void

See:

feathers.core.IMeasureObject.resetWidth

private@:value({ minHeight : 0.0, minWidth : 0.0 })@:dox(show)saveMeasurements (width:Float, height:Float, minWidth:Float = 0.0, minHeight:Float = 0.0, ?maxWidth:Float, ?maxHeight:Float):Bool

Saves the calculated dimensions for the component, replacing any values that haven't been set explicitly. Returns true if the reported values have changed and Event.RESIZE was dispatched.

Available since

1.0.0

.

Defined by ValidatingSprite

@:value({ flag : null })isInvalid (?flag:String):Bool

Indicates whether the control is pending validation or not. By default, returns true if any invalidation flag has been set. If you pass in a specific flag, returns true only if that flag has been set (others may be set too, but it checks the specific flag only. If all flags have been marked as invalid, always returns true.

The following example invalidates a component:

component.setInvalid();
trace(component.isInvalid()); // true
Available since

1.0.0

.

@:value({ flag : null })setInvalid (?flag:String):Void

Call this function to tell the UI control that a redraw is pending. The redraw will happen immediately before OpenFL renders the UI control to the screen. The validation system exists to ensure that multiple properties can be set together without redrawing multiple times in between each property change.

If you cannot wait until later for the validation to happen, you can call validate() to redraw immediately. As an example, you might want to validate immediately if you need to access the correct width or height values of the UI control, since these values are calculated during validation.

The following example invalidates a component:

component.setInvalid();
trace(component.isInvalid()); // true
Available since

1.0.0

.

private@:dox(show)setInvalidationFlag (flag:String):Void

Sets an invalidation flag. This will not add the component to the validation queue. It only sets the flag. A subclass might use this function during draw() to manipulate the flags that its superclass sees.

Available since

1.0.0

.

See:

ValidatingSprite.setInvalid()

private@:dox(show)update ():Void

Override to customize layout and to adjust properties of children. Called when the component validates, if any flags have been marked to indicate that validation is pending.

The following example overrides updating after invalidation:

override private function update():Void {
	super.update();

}
Available since

1.0.0

.