class: HBox

[98:7] extends: Pane

The HBox class wraps the JavaFX HBox layout container, which arranges all child nodes in a single horizontal row from left to right in the order they were added. Children are sized to their preferred widths, and you can control the spacing between them as well as their vertical alignment within the row. HBox is one of the most common building blocks for toolbar-style layouts and horizontal control groups.

CSS Properties -- HBox

Property	Values	Default	Description
`-fx-spacing`	`<size>`	`0`	Space between child nodes.
`-fx-alignment`	`top-left \| top-center \| top-right \| center-left \| center \| center-right \| bottom-left \| bottom-center \| bottom-right \| baseline-left \| baseline-center \| baseline-right`	`top-left`	Alignment of children within the HBox.
`-fx-fill-height`	`<boolean>`	`true`	When true, resizable children are stretched to fill the HBox height.

CSS Properties -- Region

Background fills

Property	Values	Default	Description
`-fx-background-color`	`<paint> [, <paint>]*`	`transparent`	One or more paint values for background fill layers, rendered back to front.
`-fx-background-insets`	`<size>` or `<t> <r> <b> <l>` [, ...]*	`0 0 0 0`	Insets from the region edges for each background fill layer.
`-fx-background-radius`	`<size> [/ <size>]* [, ...]*`	`0 0 0 0`	Corner radii for each background fill layer.

Background images

Property	Values	Default	Description
`-fx-background-image`	`<uri> [, <uri>]*`	`null`	One or more image URIs for background image layers.
`-fx-background-position`	`<bg-position> [, ...]*`	`0% 0%`	Position of each background image within the region. Accepts keywords or size values.
`-fx-background-repeat`	`<repeat-style> [, ...]*`	`repeat repeat`	Tiling behavior for each background image. Values: repeat, no-repeat, round, space applied per axis.
`-fx-background-size`	`<bg-size> [, ...]*`	`auto auto`	Dimensions for each background image. Supports cover, contain, stretch, or explicit sizes.

Stroked borders

Property	Values	Default	Description
`-fx-border-color`	`<paint>` or `<t> <r> <b> <l>` [, ...]*	`null`	Paint colors for the border stroke layers.
`-fx-border-insets`	`<size>` or `<t> <r> <b> <l>` [, ...]*	`null`	Insets from region edges for each border layer.
`-fx-border-radius`	`<size> [, ...]*`	`null`	Corner radii for border stroke layers.
`-fx-border-style`	`<border-style> [, ...]*`	`null`	Border line style (solid, dotted, dashed) plus phase and line cap/join options per layer.
`-fx-border-width`	`<size>` or `<t> <r> <b> <l>` [, ...]*	`null`	Thickness of each border stroke layer, per side.

Border images

Property	Values	Default	Description
`-fx-border-image-source`	`<uri> [, <uri>]*`	`null`	Image URIs used to paint the border.
`-fx-border-image-insets`	`<size>` or `<t> <r> <b> <l>` [, ...]*	`0 0 0 0`	Insets for each border image layer.
`-fx-border-image-repeat`	`<repeat-style> [, ...]*`	`repeat repeat`	Tiling behavior for each border image.
`-fx-border-image-slice`	`<size>` or `<t> <r> <b> <l>` [fill] [, ...]*	`100%`	Divides each border image into nine regions. Adding fill preserves the center region.
`-fx-border-image-width`	`<size>` or `<t> <r> <b> <l>` [, ...]*	`1 1 1 1`	Width of each border image slice per side.

Other Region properties

Property	Values	Default	Description
`-fx-padding`	`<size>` or `<t> <r> <b> <l>`	`0 0 0 0`	Interior padding between the region border and its content.
`-fx-shape`	`<string>`	`null`	SVG path string that defines a custom clip shape for the region.
`-fx-scale-shape`	`true \| false`	`true`	When true, the shape is scaled to fit the region.
`-fx-position-shape`	`true \| false`	`true`	When true, the shape is centered within the region.
`-fx-snap-to-pixel`	`true \| false`	`true`	When true, positions and sizes are rounded to whole pixel boundaries.
`-fx-min-width`	`<size>`	`-1`	Minimum width. -1 uses the computed minimum.
`-fx-pref-width`	`<size>`	`-1`	Preferred width. -1 uses the computed preferred.
`-fx-max-width`	`<size>`	`-1`	Maximum width. -1 uses the computed maximum.
`-fx-min-height`	`<size>`	`-1`	Minimum height. -1 uses the computed minimum.
`-fx-pref-height`	`<size>`	`-1`	Preferred height. -1 uses the computed preferred.
`-fx-max-height`	`<size>`	`-1`	Maximum height. -1 uses the computed maximum.

CSS Properties -- Node

Property	Values	Default	Description
`-fx-blend-mode`	`add \| blue \| color-burn \| color-dodge \| darken \| difference \| exclusion \| green \| hard-light \| lighten \| multiply \| overlay \| red \| screen \| soft-light \| src-atop \| src-in \| src-out \| src-over`	`null`	Blend mode used when compositing this node with nodes beneath it.
`-fx-cursor`	`null \| crosshair \| default \| hand \| move \| e-resize \| h-resize \| ne-resize \| nw-resize \| n-resize \| se-resize \| sw-resize \| s-resize \| w-resize \| v-resize \| text \| wait \| <url>`	`null` (inherits)	Mouse cursor shape shown when the pointer is over this node. Inherits from parent by default.
`-fx-effect`	`<effect>`	`null`	A visual effect (e.g. DropShadow, InnerShadow) applied to the rendered node.
`-fx-focus-traversable`	`true \| false`	`false`	Whether this node participates in focus traversal via the keyboard Tab key.
`-fx-view-order`	`<number>`	`0`	Adjusts rendering and hit-test order within the parent without changing the scene graph order.
`-fx-opacity`	`<number> [0.0 - 1.0]`	`1`	Opacity of the node. 0 is fully transparent, 1 is fully opaque.
`-fx-rotate`	`<number>`	`0`	Rotation angle in degrees applied around the node's center point. Positive values are clockwise.
`-fx-scale-x`	`<number>`	`1`	Scale factor along the X axis about the node's center.
`-fx-scale-y`	`<number>`	`1`	Scale factor along the Y axis about the node's center.
`-fx-scale-z`	`<number>`	`1`	Scale factor along the Z axis about the node's center.
`-fx-translate-x`	`<number>`	`0`	Translation offset along the X axis in pixels.
`-fx-translate-y`	`<number>`	`0`	Translation offset along the Y axis in pixels.
`-fx-translate-z`	`<number>`	`0`	Translation offset along the Z axis in pixels.
`visibility`	`visible \| hidden \| collapse \| inherit`	`visible`	Controls whether the node is rendered and participates in layout. `collapse` removes it from layout; `hidden` keeps the space.
`-fx-managed`	`true \| false`	`true`	When false, the parent layout does not manage this node's position or size.

Methods

HBox ()

Initializes a new HBox instance. This constructor creates a JavaFX HBox object and assigns it to this.obj.
- @r this object
spacingProperty ()

Returns the spacing property used to control the horizontal gap between child nodes.
- @r An AussomJavaObject wrapping a DoubleProperty.
setSpacing (double Spacing)

Sets the horizontal gap, in pixels, inserted between child nodes.
- @p Spacing is a double with the gap in pixels.
- @r this object for chaining
getSpacing ()

Returns the horizontal gap, in pixels, between child nodes.
- @r A double with the configured spacing.
alignmentProperty ()

Returns the alignment property controlling the position of children inside the HBox bounds.
- @r An AussomJavaObject wrapping an ObjectProperty of Pos.
setAlignment (string Alignment)

Sets the alignment of the children inside the HBox. Pass a Pos enum name such as "CENTER", "TOP_LEFT", or "BOTTOM_RIGHT" and the wrapper resolves it to the javafx.geometry.Pos value.
- @p Alignment is a string with the Pos enum name.
- @r this object for chaining
getAlignment ()

Returns the current alignment used to position children inside the HBox.
- @r An AussomJavaObject wrapping a javafx.geometry.Pos value.
fillHeightProperty ()

Returns the fillHeight property controlling whether resizable children stretch to fill the HBox height.
- @r An AussomJavaObject wrapping a BooleanProperty.
setFillHeight (bool Fill)

Sets whether resizable children are stretched to fill the HBox height.
- @p Fill is a bool; true makes children fill the HBox height.
- @r this object for chaining
isFillHeight ()

Returns whether resizable children are configured to fill the HBox height.
- @r A bool that is true when fillHeight is enabled.