Class VBox

javafx.scene.layout.VBox

All Implemented Interfaces:: Styleable, EventTarget

public class VBox extends Pane

VBox lays out its children in a single vertical column. If the vbox has a border and/or padding set, then the contents will be laid out within those insets.

VBox example:


     VBox vbox = new VBox(8); // spacing = 8
     vbox.getChildren().addAll(new Button("Cut"), new Button("Copy"), new Button("Paste"));

VBox will resize children (if resizable) to their preferred heights and uses its fillWidth property to determine whether to resize their widths to fill its own width or keep their widths to their preferred (fillWidth defaults to true). The alignment of the content is controlled by the alignment property, which defaults to Pos.TOP_LEFT.

If a vbox is resized larger than its preferred height, by default it will keep children to their preferred heights, leaving the extra space unused. If an application wishes to have one or more children be allocated that extra space it may optionally set a vgrow constraint on the child. See "Optional Layout Constraints" for details.

VBox lays out each managed child regardless of the child's visible property value; unmanaged children are ignored.

Resizable Range

A vbox's parent will resize the vbox within the vbox's resizable range during layout. By default the vbox computes this range based on its content as outlined in the table below.

VBox Resize Table
	width	height
minimum	left/right insets plus the largest of the children's min widths.	top/bottom insets plus the sum of each child's min height plus spacing between each child.
preferred	left/right insets plus the largest of the children's pref widths.	top/bottom insets plus the sum of each child's pref height plus spacing between each child.
maximum	Double.MAX_VALUE	Double.MAX_VALUE

A vbox's unbounded maximum width and height are an indication to the parent that it may be resized beyond its preferred size to fill whatever space is assigned to it.

VBox provides properties for setting the size range directly. These properties default to the sentinel value USE_COMPUTED_SIZE, however the application may set them to other values as needed:


     vbox.setPrefWidth(400);

Applications may restore the computed values by setting these properties back to USE_COMPUTED_SIZE.

VBox does not clip its content by default, so it is possible that children's bounds may extend outside its own bounds if a child's min size prevents it from being fit within the vbox.

Optional Layout Constraints

An application may set constraints on individual children to customize VBox's layout. For each constraint, VBox provides a static method for setting it on the child.

VBox Constraint Table
Constraint	Type	Description
vgrow	javafx.scene.layout.Priority	The vertical grow priority for the child.
margin	javafx.geometry.Insets	Margin space around the outside of the child.

For example, if a vbox needs the ListView to be allocated all extra space:


     VBox vbox = new VBox();
     ListView list = new ListView();
     VBox.setVgrow(list, Priority.ALWAYS);
     vbox.getChildren().addAll(new Label("Names:"), list);

If more than one child has the same grow priority set, then the vbox will allocate equal amounts of space to each. VBox will only grow a child up to its maximum height, so if the child has a max height other than Double.MAX_VALUE, the application may need to override the max to allow it to grow.

Since:: JavaFX 2.0

Property Summary

Type	Property	Description
`final ObjectProperty<Pos>`	`alignment`	The overall alignment of children within the vbox's width and height.
`final BooleanProperty`	`fillWidth`	Whether or not resizable children will be resized to fill the full width of the vbox or be resized to their preferred width and aligned according to the `alignment` hpos value.
`final DoubleProperty`	`spacing`	The amount of vertical space between each child in the vbox.

Properties declared in class javafx.scene.layout.Region

background, border, cacheShape, centerShape, height, insets, maxHeight, maxWidth, minHeight, minWidth, opaqueInsets, padding, prefHeight, prefWidth, scaleShape, shape, snapToPixel, width

Properties declared in class javafx.scene.Parent

needsLayout

Properties declared in class javafx.scene.Node

accessibleHelp, accessibleRoleDescription, accessibleRole, accessibleText, blendMode, boundsInLocal, boundsInParent, cacheHint, cache, clip, cursor, depthTest, disabled, disable, effectiveNodeOrientation, effect, eventDispatcher, focused, focusTraversable, focusVisible, focusWithin, hover, id, inputMethodRequests, layoutBounds, layoutX, layoutY, localToParentTransform, localToSceneTransform, managed, mouseTransparent, nodeOrientation, onContextMenuRequested, onDragDetected, onDragDone, onDragDropped, onDragEntered, onDragExited, onDragOver, onInputMethodTextChanged, onKeyPressed, onKeyReleased, onKeyTyped, onMouseClicked, onMouseDragEntered, onMouseDragExited, onMouseDragged, onMouseDragOver, onMouseDragReleased, onMouseEntered, onMouseExited, onMouseMoved, onMousePressed, onMouseReleased, onRotate, onRotationFinished, onRotationStarted, onScrollFinished, onScroll, onScrollStarted, onSwipeDown, onSwipeLeft, onSwipeRight, onSwipeUp, onTouchMoved, onTouchPressed, onTouchReleased, onTouchStationary, onZoomFinished, onZoom, onZoomStarted, opacity, parent, pickOnBounds, pressed, rotate, rotationAxis, scaleX, scaleY, scaleZ, scene, style, translateX, translateY, translateZ, viewOrder, visible

Field Summary

Fields declared in class javafx.scene.layout.Region

USE_COMPUTED_SIZE, USE_PREF_SIZE

Fields declared in class javafx.scene.Node

BASELINE_OFFSET_SAME_AS_HEIGHT

Constructor Summary

Constructor	Description
`VBox()`	Creates a `VBox` layout with `spacing = 0` and alignment at `TOP_LEFT`.
`VBox(double spacing)`	Creates a `VBox` layout with the specified spacing between children.
`VBox(double spacing, Node... children)`	Creates a `VBox` layout with the specified spacing between children.
`VBox(Node... children)`	Creates a `VBox` layout with `spacing = 0`.

Method Summary

Modifier and Type	Method	Description
`final ObjectProperty<Pos>`	`alignmentProperty()`	The overall alignment of children within the vbox's width and height.
`static void`	`clearConstraints(Node child)`	Removes all vbox constraints from the child node.
`final BooleanProperty`	`fillWidthProperty()`	Whether or not resizable children will be resized to fill the full width of the vbox or be resized to their preferred width and aligned according to the `alignment` hpos value.
`final Pos`	`getAlignment()`	Gets the value of the `alignment` property.
`static List<CssMetaData<? extends Styleable,?>>`	`getClassCssMetaData()`	Gets the `CssMetaData` associated with this class, which may include the `CssMetaData` of its superclasses.
`Orientation`	`getContentBias()`	Returns the orientation of a node's resizing bias for layout purposes.
`List<CssMetaData<? extends Styleable,?>>`	`getCssMetaData()`	This method should delegate to `Node.getClassCssMetaData()` so that a Node's CssMetaData can be accessed without the need for reflection.
`static Insets`	`getMargin(Node child)`	Returns the child's margin property if set.
`final double`	`getSpacing()`	Gets the value of the `spacing` property.
`static Priority`	`getVgrow(Node child)`	Returns the child's vgrow property if set.
`final boolean`	`isFillWidth()`	Gets the value of the `fillWidth` property.
`final void`	`setAlignment(Pos value)`	Sets the value of the `alignment` property.
`final void`	`setFillWidth(boolean value)`	Sets the value of the `fillWidth` property.
`static void`	`setMargin(Node child, Insets value)`	Sets the margin for the child when contained by a vbox.
`final void`	`setSpacing(double value)`	Sets the value of the `spacing` property.
`static void`	`setVgrow(Node child, Priority value)`	Sets the vertical grow priority for the child when contained by a vbox.
`final DoubleProperty`	`spacingProperty()`	The amount of vertical space between each child in the vbox.

Methods declared in class javafx.scene.layout.Pane

getChildren

Methods declared in class javafx.scene.layout.Region

backgroundProperty, borderProperty, cacheShapeProperty, centerShapeProperty, computeMaxHeight, computeMaxWidth, computeMinHeight, computeMinWidth, computePrefHeight, computePrefWidth, getBackground, getBorder, getHeight, getInsets, getMaxHeight, getMaxWidth, getMinHeight, getMinWidth, getOpaqueInsets, getPadding, getPrefHeight, getPrefWidth, getShape, getUserAgentStylesheet, getWidth, heightProperty, insetsProperty, isCacheShape, isCenterShape, isResizable, isScaleShape, isSnapToPixel, layoutInArea, layoutInArea, layoutInArea, layoutInArea, maxHeight, maxHeightProperty, maxWidth, maxWidthProperty, minHeight, minHeightProperty, minWidth, minWidthProperty, opaqueInsetsProperty, paddingProperty, positionInArea, positionInArea, prefHeight, prefHeightProperty, prefWidth, prefWidthProperty, resize, scaleShapeProperty, setBackground, setBorder, setCacheShape, setCenterShape, setHeight, setMaxHeight, setMaxSize, setMaxWidth, setMinHeight, setMinSize, setMinWidth, setOpaqueInsets, setPadding, setPrefHeight, setPrefSize, setPrefWidth, setScaleShape, setShape, setSnapToPixel, setWidth, shapeProperty, snappedBottomInset, snappedLeftInset, snappedRightInset, snappedTopInset, snapPosition, snapPositionX, snapPositionY, snapSize, snapSizeX, snapSizeY, snapSpace, snapSpaceX, snapSpaceY, snapToPixelProperty, widthProperty

Methods declared in class javafx.scene.Parent

getBaselineOffset, getChildrenUnmodifiable, getManagedChildren, getStylesheets, isNeedsLayout, layout, layoutChildren, needsLayoutProperty, requestLayout, requestParentLayout, setNeedsLayout, updateBounds

Methods declared in class javafx.scene.Node

accessibleHelpProperty, accessibleRoleDescriptionProperty, accessibleRoleProperty, accessibleTextProperty, addEventFilter, addEventHandler, applyCss, autosize, blendModeProperty, boundsInLocalProperty, boundsInParentProperty, buildEventDispatchChain, cacheHintProperty, cacheProperty, clipProperty, computeAreaInScreen, contains, contains, cursorProperty, depthTestProperty, disabledProperty, disableProperty, effectiveNodeOrientationProperty, effectProperty, eventDispatcherProperty, executeAccessibleAction, fireEvent, focusedProperty, focusTraversableProperty, focusVisibleProperty, focusWithinProperty, getAccessibleHelp, getAccessibleRole, getAccessibleRoleDescription, getAccessibleText, getBlendMode, getBoundsInLocal, getBoundsInParent, getCacheHint, getClip, getCursor, getDepthTest, getEffect, getEffectiveNodeOrientation, getEventDispatcher, getId, getInitialCursor, getInitialFocusTraversable, getInputMethodRequests, getLayoutBounds, getLayoutX, getLayoutY, getLocalToParentTransform, getLocalToSceneTransform, getNodeOrientation, getOnContextMenuRequested, getOnDragDetected, getOnDragDone, getOnDragDropped, getOnDragEntered, getOnDragExited, getOnDragOver, getOnInputMethodTextChanged, getOnKeyPressed, getOnKeyReleased, getOnKeyTyped, getOnMouseClicked, getOnMouseDragEntered, getOnMouseDragExited, getOnMouseDragged, getOnMouseDragOver, getOnMouseDragReleased, getOnMouseEntered, getOnMouseExited, getOnMouseMoved, getOnMousePressed, getOnMouseReleased, getOnRotate, getOnRotationFinished, getOnRotationStarted, getOnScroll, getOnScrollFinished, getOnScrollStarted, getOnSwipeDown, getOnSwipeLeft, getOnSwipeRight, getOnSwipeUp, getOnTouchMoved, getOnTouchPressed, getOnTouchReleased, getOnTouchStationary, getOnZoom, getOnZoomFinished, getOnZoomStarted, getOpacity, getParent, getProperties, getPseudoClassStates, getRotate, getRotationAxis, getScaleX, getScaleY, getScaleZ, getScene, getStyle, getStyleableParent, getStyleClass, getTransforms, getTranslateX, getTranslateY, getTranslateZ, getTypeSelector, getUserData, getViewOrder, hasProperties, hoverProperty, idProperty, inputMethodRequestsProperty, intersects, intersects, isCache, isDisable, isDisabled, isFocused, isFocusTraversable, isFocusVisible, isFocusWithin, isHover, isManaged, isMouseTransparent, isPickOnBounds, isPressed, isVisible, layoutBoundsProperty, layoutXProperty, layoutYProperty, localToParent, localToParent, localToParent, localToParent, localToParent, localToParentTransformProperty, localToScene, localToScene, localToScene, localToScene, localToScene, localToScene, localToScene, localToScene, localToScene, localToScene, localToSceneTransformProperty, localToScreen, localToScreen, localToScreen, localToScreen, localToScreen, lookup, lookupAll, managedProperty, mouseTransparentProperty, nodeOrientationProperty, notifyAccessibleAttributeChanged, onContextMenuRequestedProperty, onDragDetectedProperty, onDragDoneProperty, onDragDroppedProperty, onDragEnteredProperty, onDragExitedProperty, onDragOverProperty, onInputMethodTextChangedProperty, onKeyPressedProperty, onKeyReleasedProperty, onKeyTypedProperty, onMouseClickedProperty, onMouseDragEnteredProperty, onMouseDragExitedProperty, onMouseDraggedProperty, onMouseDragOverProperty, onMouseDragReleasedProperty, onMouseEnteredProperty, onMouseExitedProperty, onMouseMovedProperty, onMousePressedProperty, onMouseReleasedProperty, onRotateProperty, onRotationFinishedProperty, onRotationStartedProperty, onScrollFinishedProperty, onScrollProperty, onScrollStartedProperty, onSwipeDownProperty, onSwipeLeftProperty, onSwipeRightProperty, onSwipeUpProperty, onTouchMovedProperty, onTouchPressedProperty, onTouchReleasedProperty, onTouchStationaryProperty, onZoomFinishedProperty, onZoomProperty, onZoomStartedProperty, opacityProperty, parentProperty, parentToLocal, parentToLocal, parentToLocal, parentToLocal, parentToLocal, pickOnBoundsProperty, pressedProperty, pseudoClassStateChanged, queryAccessibleAttribute, relocate, removeEventFilter, removeEventHandler, requestFocus, resizeRelocate, rotateProperty, rotationAxisProperty, scaleXProperty, scaleYProperty, scaleZProperty, sceneProperty, sceneToLocal, sceneToLocal, sceneToLocal, sceneToLocal, sceneToLocal, sceneToLocal, sceneToLocal, sceneToLocal, screenToLocal, screenToLocal, screenToLocal, setAccessibleHelp, setAccessibleRole, setAccessibleRoleDescription, setAccessibleText, setBlendMode, setCache, setCacheHint, setClip, setCursor, setDepthTest, setDisable, setDisabled, setEffect, setEventDispatcher, setEventHandler, setFocused, setFocusTraversable, setHover, setId, setInputMethodRequests, setLayoutX, setLayoutY, setManaged, setMouseTransparent, setNodeOrientation, setOnContextMenuRequested, setOnDragDetected, setOnDragDone, setOnDragDropped, setOnDragEntered, setOnDragExited, setOnDragOver, setOnInputMethodTextChanged, setOnKeyPressed, setOnKeyReleased, setOnKeyTyped, setOnMouseClicked, setOnMouseDragEntered, setOnMouseDragExited, setOnMouseDragged, setOnMouseDragOver, setOnMouseDragReleased, setOnMouseEntered, setOnMouseExited, setOnMouseMoved, setOnMousePressed, setOnMouseReleased, setOnRotate, setOnRotationFinished, setOnRotationStarted, setOnScroll, setOnScrollFinished, setOnScrollStarted, setOnSwipeDown, setOnSwipeLeft, setOnSwipeRight, setOnSwipeUp, setOnTouchMoved, setOnTouchPressed, setOnTouchReleased, setOnTouchStationary, setOnZoom, setOnZoomFinished, setOnZoomStarted, setOpacity, setPickOnBounds, setPressed, setRotate, setRotationAxis, setScaleX, setScaleY, setScaleZ, setStyle, setTranslateX, setTranslateY, setTranslateZ, setUserData, setViewOrder, setVisible, snapshot, snapshot, startDragAndDrop, startFullDrag, styleProperty, toBack, toFront, toString, translateXProperty, translateYProperty, translateZProperty, usesMirroring, viewOrderProperty, visibleProperty

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods declared in interface javafx.css.Styleable

getStyleableNode

Property Details

spacing

public final DoubleProperty spacingProperty

The amount of vertical space between each child in the vbox.

See Also:

getSpacing()
setSpacing(double)
spacingProperty()

alignment

public final ObjectProperty<Pos> alignmentProperty

The overall alignment of children within the vbox's width and height.

See Also:

getAlignment()
setAlignment(Pos)
alignmentProperty()

fillWidth

public final BooleanProperty fillWidthProperty

Whether or not resizable children will be resized to fill the full width of the vbox or be resized to their preferred width and aligned according to the alignment hpos value.

See Also:

isFillWidth()
setFillWidth(boolean)
fillWidthProperty()

Constructor Details

VBox

public VBox()

Creates a VBox layout with spacing = 0 and alignment at TOP_LEFT.

VBox

public VBox(double spacing)

Creates a VBox layout with the specified spacing between children.

Parameters:: spacing - the amount of vertical space between each child

VBox

public VBox(Node... children)

Creates a VBox layout with spacing = 0.

Parameters:: children - the initial set of children for this pane
Since:: JavaFX 8.0

VBox

public VBox(double spacing, Node... children)

Creates a VBox layout with the specified spacing between children.

Parameters:: spacing - the amount of vertical space between each child; children - the initial set of children for this pane
Since:: JavaFX 8.0

Method Details

setVgrow

public static void setVgrow(Node child, Priority value)

Sets the vertical grow priority for the child when contained by a vbox. If set, the vbox will use the priority value to allocate additional space if the vbox is resized larger than its preferred height. If multiple vbox children have the same vertical grow priority, then the extra space will be split evenly between them. If no vertical grow priority is set on a child, the vbox will never allocate any additional vertical space for that child.

Setting the value to null will remove the constraint.

Parameters:: child - the child of a vbox; value - the vertical grow priority for the child

getVgrow

public static Priority getVgrow(Node child)

Returns the child's vgrow property if set.

Parameters:: child - the child node of a vbox
Returns:: the vertical grow priority for the child or null if no priority was set

setMargin

public static void setMargin(Node child, Insets value)

Sets the margin for the child when contained by a vbox. If set, the vbox will layout the child so that it has the margin space around it. Setting the value to null will remove the constraint.

Parameters:: child - the child mode of a vbox; value - the margin of space around the child

getMargin

public static Insets getMargin(Node child)

Returns the child's margin property if set.

Parameters:: child - the child node of a vbox
Returns:: the margin for the child or null if no margin was set

clearConstraints

public static void clearConstraints(Node child)

Removes all vbox constraints from the child node.

Parameters:: child - the child node

spacingProperty

public final DoubleProperty spacingProperty()

The amount of vertical space between each child in the vbox.

Returns:

the amount of vertical space between each child in the vbox

See Also:

getSpacing()
setSpacing(double)

setSpacing

public final void setSpacing(double value)

Sets the value of the spacing property.

Property description:

The amount of vertical space between each child in the vbox.

Parameters:

value - the value for the spacing property

See Also:

getSpacing()
spacingProperty()

getSpacing

public final double getSpacing()

Gets the value of the spacing property.

Property description:

The amount of vertical space between each child in the vbox.

Returns:

the value of the spacing property

See Also:

setSpacing(double)
spacingProperty()

alignmentProperty

public final ObjectProperty<Pos> alignmentProperty()

The overall alignment of children within the vbox's width and height.

Returns:

the overall alignment of children within the vbox's width and height

See Also:

getAlignment()
setAlignment(Pos)

setAlignment

public final void setAlignment(Pos value)

Sets the value of the alignment property.

Property description:

The overall alignment of children within the vbox's width and height.

Parameters:

value - the value for the alignment property

See Also:

getAlignment()
alignmentProperty()

getAlignment

public final Pos getAlignment()

Gets the value of the alignment property.

Property description:

The overall alignment of children within the vbox's width and height.

Returns:

the value of the alignment property

See Also:

setAlignment(Pos)
alignmentProperty()

fillWidthProperty

public final BooleanProperty fillWidthProperty()

Whether or not resizable children will be resized to fill the full width of the vbox or be resized to their preferred width and aligned according to the alignment hpos value.

Returns:

true if resizable children will be resized to fill the full width of the vbox

See Also:

isFillWidth()
setFillWidth(boolean)

setFillWidth

public final void setFillWidth(boolean value)

Sets the value of the fillWidth property.

Property description:

Whether or not resizable children will be resized to fill the full width of the vbox or be resized to their preferred width and aligned according to the alignment hpos value.

Parameters:

value - the value for the fillWidth property

See Also:

isFillWidth()
fillWidthProperty()

isFillWidth

public final boolean isFillWidth()

Gets the value of the fillWidth property.

Property description:

Whether or not resizable children will be resized to fill the full width of the vbox or be resized to their preferred width and aligned according to the alignment hpos value.

Returns:

the value of the fillWidth property

See Also:

setFillWidth(boolean)
fillWidthProperty()

getContentBias

public Orientation getContentBias()

Description copied from class: Node

Returns the orientation of a node's resizing bias for layout purposes. If the node type has no bias, returns null. If the node is resizable and it's height depends on its width, returns HORIZONTAL, else if its width depends on its height, returns VERTICAL.

Resizable subclasses should override this method to return an appropriate value.

Overrides:

getContentBias in class Node

Returns:

null unless one of its children has a content bias.

See Also:

getClassCssMetaData

public static List<CssMetaData<? extends Styleable,?>> getClassCssMetaData()

Gets the CssMetaData associated with this class, which may include the CssMetaData of its superclasses.

Returns:: the CssMetaData
Since:: JavaFX 8.0

getCssMetaData

public List<CssMetaData<? extends Styleable,?>> getCssMetaData()

This method should delegate to Node.getClassCssMetaData() so that a Node's CssMetaData can be accessed without the need for reflection.

Specified by:: getCssMetaData in interface Styleable
Overrides:: getCssMetaData in class Region
Returns:: The CssMetaData associated with this node, which may include the CssMetaData of its superclasses.
Since:: JavaFX 8.0

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Documentation extracted from JavaFX API Documentation.
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