class ScrollContainer

Determines if the scroll bars should be automatically hidden after scrolling has ended, whether it was through user interaction or animation.

In the following example, scroll bar auto-hiding is disabled:

container.autoHideScrollBars = false;

This property has no effect if fixedScrollBars is true. Fixed scroll bars are always visible. Similarly, if showScrollBars is false, then the scroll bars are always hidden.

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 container to use as a background skin:

group.backgroundSkin = new Bitmap(bitmapData);

See also:

• BaseScrollContainer.disabledBackgroundSkin

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 gives the group a disabled background skin:

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

See also:

• BaseScrollContainer.backgroundSkin

Determines if the scroll bars are fixed to the edges of the container, without overlapping the container's content, or if the scroll bars are floating above the container's content.

In the following example, the scroll bars are fixed:

container.fixedScrollBars = true;

This property has no effect if showScrollBars is false.

The duration, measured in seconds, of the animation when a scroll bar fades out.

In the following example, the duration of the animation that hides the scroll bars is set to 500 milliseconds:

container.hideScrollBarDuration = 0.5;

The easing function used for hiding the scroll bars, if applicable.

In the following example, the ease of the animation that hides the scroll bars is customized:

container.hideScrollBarEase = Elastic.easeOut;

A skin to mask the content of the container. The skin is resized to the full dimensions of the container. It is passed to the mask property.

This property masks the entire container, including any chrome such as scroll bars or headers and footers. To mask only the scrollable region, use viewPortMaskSkin instead.

The following example passes a RectangleSkin with a cornerRadius for the container's mask skin:

var maskSkin = new RectangleSkin();
maskSkin.fill = SolidColor(0xff0000);
maskSkin.cornerRadius = 10.0;
container.maskSkin = maskSkin;

See also:

• openfl.display.DisplayObject.mask

• BaseScrollContainer.viewPortMaskSkin

The number of pixels the container may be scrolled horizontally in the rightward direction. This value is automatically calculated based on the bounds of the container's viewport.

The scrollX property may have a higher value than the maximum if the elasticEdges property is enabled. However, once the user stops interacting with the container, it will automatically animate back to the maximum position.

See also:

• BaseScrollContainer.scrollX

• BaseScrollContainer.maxScrollX

The number of pixels the container may be scrolled vertically in the downward direction. This value is automatically calculated based on the bounds of the container's viewport.

The scrollY property may have a higher value than the maximum if the elasticEdges property is enabled. However, once the user stops interacting with the container, it will automatically animate back to the maximum position.

See also:

• BaseScrollContainer.scrollY

• BaseScrollContainer.minScrollY

The number of pixels the container may be scrolled horizontally in the leftward direction. This value is automatically calculated based on the bounds of the container's viewport.

The scrollX property may have a lower value than the minimum if the elasticEdges property is enabled. However, once the user stops interacting with the container, it will automatically animate back to the minimum position.

See also:

• BaseScrollContainer.scrollX

• BaseScrollContainer.maxScrollX

The number of pixels the container may be scrolled vertically in the upward direction. This value is automatically calculated based on the bounds of the container's viewport.

The scrollY property may have a lower value than the minimum if the elasticEdges property is enabled. However, once the user stops interacting with the container, it will automatically animate back to the minimum position.

See also:

• BaseScrollContainer.scrollY

• BaseScrollContainer.maxScrollY

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

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

container.paddingBottom = 20.0;

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

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

container.paddingLeft = 20.0;

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

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

container.paddingRight = 20.0;

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

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

container.paddingTop = 20.0;

Setting scrollX will clamp the value between minScrollX and maxScrollX, but setting unrestrictedScrollX will allow values outside of that range.

See also:

• BaseScrollContainer.scrollX

Setting restrictedScrollY will clamp the value to the range between minScrollY and maxScrollY.

See also:

• BaseScrollContainer.scrollY

Creates the horizontal scroll bar. The horizontal scroll bar may be any implementation of IScrollBar, but typically, the feathers.controls.HScrollBar component is used.

In the following example, a custom horizontal scroll bar factory is passed to the container:

container.scrollBarXFactory = () ->
{
	return new HScrollBar();
};

See also:

• feathers.controls.HScrollBar

Determines the edge of the container where the horizontal scroll bar will be positioned (either on the top or the bottom).

In the following example, the horizontal scroll bar is positioned on the top edge of the container:

container.scrollBarXPosition = TOP;

See also:

• feathers.layout.RelativePosition.BOTTOM

• feathers.layout.RelativePosition.TOP

Creates the vertical scroll bar. The vertical scroll bar may be any implementation of IScrollBar, but typically, the feathers.controls.VScrollBar component is used.

In the following example, a custom vertical scroll bar factory is passed to the container:

container.scrollBarYFactory = () ->
{
	return new VScrollBar();
};

See also:

• feathers.controls.VScrollBar

Determines the edge of the container where the vertical scroll bar will be positioned (either on the left or the right).

In the following example, the vertical scroll bar is positioned on the left edge of the container:

container.scrollBarYPosition = LEFT;

See also:

• feathers.layout.RelativePosition.RIGHT

• feathers.layout.RelativePosition.LEFT

Determines how scrolling is rendered by the container.

In the following example, scroll mode is changed to use a scrollRect:

container.scrollMode = SCROLL_RECT;

If enabled, the scroll position will always be adjusted to the nearest pixel in stage coordinates.

In the following example, the scroll position is snapped to pixels:

container.scrollPixelSnapping = true;

Determines whether the container may scroll horizontally (on the x-axis) or not.

In the following example, horizontal scrolling is disabled:

container.scrollPolicyX = OFF;

See also:

• BaseScrollContainer.scrollPolicyY

Determines whether the container may scroll vertically (on the y-axis) or not.

In the following example, vertical scrolling is disabled:

container.scrollPolicyY = OFF;

See also:

• BaseScrollContainer.scrollPolicyX

The number of pixels the horizontal scroll position can be adjusted by a step (such as with the left/right keyboard arrow keys, or a step button on the horizontal scroll bar).

In the following example, the horizontal scroll step is set to 20 pixels:

container.scrollStepX = 20.0;

The number of pixels the vertical scroll position can be adjusted by a step (such as with the up/down keyboard arrow keys, or a step button on the vertical scroll bar).

In the following example, the vertical scroll step is set to 20 pixels:

container.scrollStepY = 20.0;

The number of pixels the container has been scrolled horizontally (on the x-axis).

When setting scrollX, the new value will be automatically clamped to the range between minScrollX and maxScrollX. To programmatically set a scrollX to a value outside of that range, set unrestrictedScrollX instead.

When the value of scrollX changes, the container dispatches an event of type ScrollEvent.SCROLL. This event is dispatched when other scroll position properties change too.

In the following example, the horizontal scroll position is modified immediately, without being animated:

container.scrollX = 100.0;

See also:

• BaseScrollContainer.minScrollX

• BaseScrollContainer.maxScrollX

• feathers.events.ScrollEvent.SCROLL

The number of pixels the container has been scrolled vertically (on the y-axis).

When the value of scrollY changes, the container dispatches an event of type ScrollEvent.SCROLL. This event is dispatched when other scroll position properties change too.

In the following example, the vertical scroll position is modified immediately, without being animated:

container.scrollY = 100.0;

See also:

• BaseScrollContainer.minScrollY

• BaseScrollContainer.maxScrollY

• feathers.events.ScrollEvent.SCROLL

Creates the Scroller utility that manages touch and mouse wheel scrolling.

In the following example, a custom scroller factory is passed to the container:

container.scrollerFactory = () ->
{
	var scroller = new Scroller();
	scroller.elasticEdges = false;
	return scroller;
};

The minimum time, in seconds, that the scroll bars will be shown, if autoHideScrollBars is enabled.

In the following example, the minimum duration to show scroll bars is increased:

container.showScrollBarMinimumDuration = 1.0;

See also:

• BaseScrollContainer.autoHideScrollBars

Determines if scroll bars are displayed or not.

In the following example, the scroll bars are hidden:

container.showScrollBars = false;

The display object rendered and scrolled within the container, provided by a subclass of BaseScrollContainer.

A skin to mask the view port (the scrollable region) of the container. The skin is resized to the dimensions of the view port only, and it does not affect any other chrome, such as scroll bars or a header or footer. It is passed to the mask property.

The following example passes a RectangleSkin with a cornerRadius for the container view port's mask skin:

var maskSkin = new RectangleSkin();
maskSkin.fill = SolidColor(0xff0000);
maskSkin.cornerRadius = 10.0;
container.viewPortMaskSkin = maskSkin;

See also:

• openfl.display.DisplayObject.mask

• BaseScrollContainer.maskSkin

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()

When disabledAlpha is not null, sets the alpha property to this value when the the enabled property is set to false.

See also:

• feathers.core.IUIControl.enabled

See also:

• feathers.layout.IFocusObject.focusEnabled

See also:

• feathers.layout.IFocusObject.focusManager

See also:

• feathers.layout.IFocusObject.focusOwner

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.

Typically used by the theme to provide styles to each component, but a custom style provider may be provided that will take precedence over the theme's style provider.

When a component initializes, its style provider sets properties that affect the component's visual appearance. If the style provider dispatches StyleProviderEvent.STYLES_CHANGE after the component has initialized, the original properties set by the style provider will be reset to their default values and before applying the new property values.

Setting the style provider or replacing an existing style provider before a component initializes will queue up the style changes until after initialization. Once a component initializes, the style provider may be changed, but the changes will be applied immediately. Similarly to when a style provider dispatcches StyleProviderEvent.STYLES_CHANGE, any properties that were set by the previous style provider will be reset to their default values before applying the new style provider.

If the themeEnabled property is false, the current theme's style provider will be ignored. However, if a custom style provider was provided from outside of the theme, it will still be used.

See also:

• FeathersControl.themeEnabled

• FeathersControl.variant

• Introduction to Feathers UI themes

See also:

• feathers.style.IStyleObject.themeEnabled

See also:

• feathers.core.IUIControl.toolTip

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

Indicates if the display object is currently validating.

Returns the visible bounds of the view port within the container's local coordinate system.

Sets all four padding properties to the same value.

See also:

• BaseScrollContainer.paddingTop

• BaseScrollContainer.paddingRight

• BaseScrollContainer.paddingBottom

• BaseScrollContainer.paddingLeft

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, `FeathersEvent.INITIALIZE is dispatched.

The following example overrides initialization:

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

}

See also:

• feathers.events.FeathersEvent.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 all four padding properties to the same value.

See also:

• FeathersControl.focusPaddingTop

• FeathersControl.focusPaddingRight

• FeathersControl.focusPaddingBottom

• FeathersControl.focusPaddingLeft

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 limits setInvalid() calls to setting invalidation flags only, and the control will not be added to the validation queue. In other words, setInvalid() calls will work similarly to setInvalidationFlag() instead.

Typically, this method should be called only during validation. If called outside of update(), the component's validation may be delayed until a future call to setInvalid().

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();

}