class LayoutGroupItemRenderer

Determines how the layout group will set its own size when its dimensions (width and height) aren't set explicitly.

In the following example, the layout group will be sized to match the stage:

group.autoSizeMode = STAGE;

Usually defaults to AutoSizeMode.CONTENT. However, if this component is the root of the OpenFL display list, defaults to AutoSizeMode.STAGE instead.

See also:

• feathers.layout.AutoSizeMode.STAGE

• feathers.layout.AutoSizeMode.CONTENT

The default background skin to display behind all content added to the group. The background skin is resized to fill the complete width and height of the group.

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

group.backgroundSkin = new Bitmap(bitmapData);

See also:

• LayoutGroup.disabledBackgroundSkin

The background skin to display behind all content added to the group when the group is disabled. The background skin is resized to fill the complete width and height of the group.

The following example gives the group a disabled background skin:

group.disabledBackgroundSkin = new Bitmap(bitmapData);
group.enabled = false;

See also:

• LayoutGroup.backgroundSkin

The layout algorithm used to position and size the group's items.

The following example tells the group to use a vertical layout:

var layout = new VerticalLayout();
layout.gap = 20.0;
layout.padding = 20.0;
layout.horizontalAlign = CENTER;
group.layout = layout;

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 also:

• FeathersEvent.CREATION_COMPLETE

• FeathersControl.update()

See also:

• feathers.core.IUIControl.enabled

See also:

• feathers.layout.IFocusObject.focusEnabled

See also:

• feathers.layout.IFocusObject.focusManager

Optional padding outside the bottom edge of this UI component when the focusRectSkin is visible.

Optional padding outside the left edge of this UI component when the focusRectSkin is visible.

Optional padding outside the right edge of this UI component when the focusRectSkin is visible.

Optional padding outside the top edge of this UI component when the focusRectSkin is visible.

An optional skin to display when an IFocusObject component receives focus.

See also:

• feathers.layout.ILayoutObject.includeInLayout

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);
}

See also:

• FeathersEvent.INITIALIZE

• FeathersControl.initialize()

See also:

• feathers.layout.ILayoutObject.layoutData

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.

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.

See also:

• FeathersControl.variant

• Introduction to Feathers UI themes

See also:

• feathers.style.IStyleObject.themeEnabled

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

See also:

• feathers.core.IMeasureObject.explicitHeight

See also:

• feathers.core.IMeasureObject.explicitMaxHeight

See also:

• feathers.core.IMeasureObject.explicitMaxWidth

See also:

• feathers.core.IMeasureObject.explicitMinHeight

See also:

• feathers.core.IMeasureObject.explicitMinWidth

See also:

• feathers.core.IMeasureObject.explicitWidth

See also:

• feathers.core.IMeasureObject.maxHeight

See also:

• feathers.core.IMeasureObject.maxWidth

See also:

• feathers.core.IMeasureObject.minHeight

See also:

• feathers.core.IMeasureObject.minWidth

See also:

• feathers.core.IValidating.depth

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();

}

See also:

• feathers.core.IUIControl.initializeNow

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

See also:

• DisplayObject.x

• DisplayObject.y

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

See also:

• DisplayObject.width

• DisplayObject.height

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

See also:

• feathers.core.IFocusObject.showFocus()

See also:

• feathers.core.IMeasureObject.resetHeight

See also:

• feathers.core.IMeasureObject.resetMaxHeight

See also:

• feathers.core.IMeasureObject.resetMaxWidth

See also:

• feathers.core.IMeasureObject.resetMinHeight

See also:

• feathers.core.IMeasureObject.resetMinWidth

See also:

• feathers.core.IMeasureObject.resetWidth

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.

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

Calls a function that temporarily disables invalidation. In other words, calls to setInvalid() will be ignored until the function returns.

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

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.

See also:

• ValidatingSprite.setInvalid()

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();

}