DateSpinnerSkin  - AS3 Flex

Factory for creating dateItem list parts.

A strongly typed property that references the component to which this skin is applied.

Skin part; container of dateItem list(s).

Constructor.

Create child objects of the component. This is an advanced method that you might override when creating a subclass of UIComponent.

A component that creates other components or objects within it is called a composite component. For example, the Flex ComboBox control is actually made up of a TextInput control to define the text area of the ComboBox, and a Button control to define the ComboBox arrow. Components implement the createChildren() method to create child objects (such as other components) within the component.

From within an override of the createChildren() method, you call the addChild() method to add each child object.

You do not call this method directly. Flex calls the createChildren() method in response to the call to the addChild() method to add the component to its parent.

Positions the children for this skin.

This method, along with colorizeContents(), is called by the updateDisplayList() method.

This method positions skin parts and graphic children of the skin. Subclasses should override this to position their children.

Parameters

Calculates the default size, and optionally the default minimum size, of the component. This is an advanced method that you might override when creating a subclass of UIComponent.

You do not call this method directly. Flex calls the measure() method when the component is added to a container using the addChild() method, and when the component's invalidateSize() method is called.

When you set a specific height and width of a component, Flex does not call the measure() method, even if you explicitly call the invalidateSize() method. That is, Flex only calls the measure() method if the explicitWidth property or the explicitHeight property of the component is NaN.

In your override of this method, you must set the measuredWidth and measuredHeight properties to define the default size. You can optionally set the measuredMinWidth and measuredMinHeight properties to define the default minimum size.

Most components calculate these values based on the content they are displaying, and from the properties that affect content display. A few components simply have hard-coded default values.

The conceptual point of measure() is for the component to provide its own natural or intrinsic size as a default. Therefore, the measuredWidth and measuredHeight properties should be determined by factors such as:

• The amount of text the component needs to display.
• The styles, such as fontSize, for that text.
• The size of a JPEG image that the component displays.
• The measured or explicit sizes of the component's children.
• Any borders, margins, and gaps.

In some cases, there is no intrinsic way to determine default values. For example, a simple GreenCircle component might simply set measuredWidth = 100 and measuredHeight = 100 in its measure() method to provide a reasonable default size. In other cases, such as a TextArea, an appropriate computation (such as finding the right width and height that would just display all the text and have the aspect ratio of a Golden Rectangle) might be too time-consuming to be worthwhile.

The default implementation of measure() sets measuredWidth, measuredHeight, measuredMinWidth, and measuredMinHeight to 0.