Class ChoiceBoxTreeCell<T>

javafx.scene.control.cell.ChoiceBoxTreeCell<T>

Type Parameters:: T - The type of the TreeItems contained within the TreeView.

All Implemented Interfaces:: Styleable, EventTarget, Skinnable

public class ChoiceBoxTreeCell<T>
extends TreeCell<T>

A class containing a ListCell implementation that draws a ChoiceBox node inside the cell.

By default, the ChoiceBoxTreeCell is rendered as a Label when not being edited, and as a ChoiceBox when in editing mode. The ChoiceBox will, by default, stretch to fill the entire tree cell.

To create a ChoiceBoxTreeCell, it is necessary to provide zero or more items that will be shown to the user when the ChoiceBox menu is showing. These items must be of the same type as the TreeView TreeItems, such that upon selection, they replace the existing value in the TreeItem.valueProperty().

Since:: JavaFX 2.2

Property Summary

Properties
Type	Property	Description
`ObjectProperty<StringConverter<T>>`	`converter`	The `StringConverter` property.

Properties declared in class javafx.scene.control.TreeCell

disclosureNode, treeItem, treeView

Properties declared in class javafx.scene.control.IndexedCell

index

Properties declared in class javafx.scene.control.Cell

editable, editing, empty, item, selected

Properties declared in class javafx.scene.control.Labeled

alignment, contentDisplay, ellipsisString, font, graphic, graphicTextGap, labelPadding, lineSpacing, mnemonicParsing, textAlignment, textFill, textOverrun, text, underline, wrapText

Properties declared in class javafx.scene.control.Control

contextMenu, skin, tooltip

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, 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

Constructors
Constructor	Description
`ChoiceBoxTreeCell()`	Creates a default ChoiceBoxTreeCell with an empty items list.
`ChoiceBoxTreeCell(ObservableList<T> items)`	Creates a default `ChoiceBoxTreeCell` instance with the given items being used to populate the `ChoiceBox` when it is shown.
`ChoiceBoxTreeCell(StringConverter<T> converter, ObservableList<T> items)`	Creates a `ChoiceBoxTreeCell` instance with the given items being used to populate the `ChoiceBox` when it is shown, and the `StringConverter` being used to convert the item in to a user-readable form.
`ChoiceBoxTreeCell(StringConverter<T> converter, T... items)`	Creates a `ChoiceBoxTreeCell` instance with the given items being used to populate the `ChoiceBox` when it is shown, and the `StringConverter` being used to convert the item in to a user-readable form.
`ChoiceBoxTreeCell(T... items)`	Creates a default `ChoiceBoxTreeCell` instance with the given items being used to populate the `ChoiceBox` when it is shown.

Method Summary

Modifier and Type	Method	Description
`ObjectProperty<StringConverter<T>>`	`converterProperty()`	The `StringConverter` property.
`static <T> Callback<TreeView<T>,TreeCell<T>>`	`forTreeView(ObservableList<T> items)`	Creates a ChoiceBox cell factory for use in `TreeView` controls.
`static <T> Callback<TreeView<T>,TreeCell<T>>`	`forTreeView(StringConverter<T> converter, ObservableList<T> items)`	Creates a ChoiceBox cell factory for use in `TreeView` controls.
`static <T> Callback<TreeView<T>,TreeCell<T>>`	`forTreeView(StringConverter<T> converter, T... items)`	Creates a ChoiceBox cell factory for use in `TreeView` controls.
`static <T> Callback<TreeView<T>,TreeCell<T>>`	`forTreeView(T... items)`	Creates a ChoiceBox cell factory for use in `TreeView` controls.
`StringConverter<T>`	`getConverter()`	Returns the `StringConverter` used in this cell.
`ObservableList<T>`	`getItems()`	Returns the items to be displayed in the ChoiceBox when it is showing.
`void`	`setConverter(StringConverter<T> value)`	Sets the `StringConverter` to be used in this cell.
`void`	`updateItem(T item, boolean empty)`	The updateItem method should not be called by developers, but it is the best method for developers to override to allow for them to customise the visuals of the cell.

Methods declared in class javafx.scene.control.TreeCell

disclosureNodeProperty, getDisclosureNode, getTreeItem, getTreeView, setDisclosureNode, treeItemProperty, treeViewProperty, updateTreeItem, updateTreeView

Methods declared in class javafx.scene.control.IndexedCell

getIndex, indexProperty, updateIndex

Methods declared in class javafx.scene.control.Cell

cancelEdit, commitEdit, editableProperty, editingProperty, emptyProperty, getInitialFocusTraversable, getItem, isEditable, isEditing, isEmpty, isItemChanged, isSelected, itemProperty, selectedProperty, setEditable, setItem, startEdit, updateSelected

Methods declared in class javafx.scene.control.Labeled

alignmentProperty, contentDisplayProperty, ellipsisStringProperty, fontProperty, getAlignment, getClassCssMetaData, getContentBias, getContentDisplay, getControlCssMetaData, getEllipsisString, getFont, getGraphic, getGraphicTextGap, getInitialAlignment, getLabelPadding, getLineSpacing, getText, getTextAlignment, getTextFill, getTextOverrun, graphicProperty, graphicTextGapProperty, isMnemonicParsing, isUnderline, isWrapText, labelPaddingProperty, lineSpacingProperty, mnemonicParsingProperty, setAlignment, setContentDisplay, setEllipsisString, setFont, setGraphic, setGraphicTextGap, setLineSpacing, setMnemonicParsing, setText, setTextAlignment, setTextFill, setTextOverrun, setUnderline, setWrapText, textAlignmentProperty, textFillProperty, textOverrunProperty, textProperty, underlineProperty, wrapTextProperty

Methods declared in class javafx.scene.control.Control

computeMaxHeight, computeMaxWidth, computeMinHeight, computeMinWidth, contextMenuProperty, createDefaultSkin, getContextMenu, getCssMetaData, getTooltip, isResizable, setContextMenu, setTooltip, skinProperty, tooltipProperty

Methods declared in class javafx.scene.layout.Region

backgroundProperty, borderProperty, cacheShapeProperty, centerShapeProperty, computePrefHeight, computePrefWidth, getBackground, getBorder, getHeight, getInsets, getMaxHeight, getMaxWidth, getMinHeight, getMinWidth, getOpaqueInsets, getPadding, getPrefHeight, getPrefWidth, getShape, getUserAgentStylesheet, getWidth, heightProperty, insetsProperty, isCacheShape, isCenterShape, 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, getChildren, 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, getAccessibleHelp, getAccessibleRole, getAccessibleRoleDescription, getAccessibleText, getBlendMode, getBoundsInLocal, getBoundsInParent, getCacheHint, getClip, getCursor, getDepthTest, getEffect, getEffectiveNodeOrientation, getEventDispatcher, getId, getInitialCursor, 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, getTransforms, getTranslateX, getTranslateY, getTranslateZ, getTypeSelector, getUserData, getViewOrder, hasProperties, hoverProperty, idProperty, inputMethodRequestsProperty, intersects, intersects, isCache, isDisable, isDisabled, isFocused, isFocusTraversable, 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.scene.control.Skinnable

getSkin, setSkin

Methods declared in interface javafx.css.Styleable

getStyleableNode, getStyleClass

Property Details

converter

public final ObjectProperty<StringConverter<T>> converterProperty

The StringConverter property.

See Also:: getConverter(), setConverter(StringConverter)

Constructor Details

ChoiceBoxTreeCell

public ChoiceBoxTreeCell()

Creates a default ChoiceBoxTreeCell with an empty items list.

ChoiceBoxTreeCell

@SafeVarargs public ChoiceBoxTreeCell(T... items)

Creates a default ChoiceBoxTreeCell instance with the given items being used to populate the ChoiceBox when it is shown.

Parameters:: items - The items to show in the ChoiceBox popup menu when selected by the user.

ChoiceBoxTreeCell

@SafeVarargs public ChoiceBoxTreeCell(StringConverter<T> converter, T... items)

Creates a ChoiceBoxTreeCell instance with the given items being used to populate the ChoiceBox when it is shown, and the StringConverter being used to convert the item in to a user-readable form.

Parameters:: converter - A Callback that can convert an item of type T into a user-readable string so that it may then be shown in the ChoiceBox popup menu.; items - The items to show in the ChoiceBox popup menu when selected by the user.

ChoiceBoxTreeCell

public ChoiceBoxTreeCell(ObservableList<T> items)

Creates a default ChoiceBoxTreeCell instance with the given items being used to populate the ChoiceBox when it is shown.

Parameters:: items - The items to show in the ChoiceBox popup menu when selected by the user.

ChoiceBoxTreeCell

public ChoiceBoxTreeCell(StringConverter<T> converter, ObservableList<T> items)

Parameters:: converter - A Callback that can convert an item of type T into a user-readable string so that it may then be shown in the ChoiceBox popup menu.; items - The items to show in the ChoiceBox popup menu when selected by the user.

Method Details

forTreeView

@SafeVarargs public static <T> Callback<TreeView<T>,TreeCell<T>> forTreeView(T... items)

Creates a ChoiceBox cell factory for use in TreeView controls. By default, the ChoiceBoxCell is rendered as a Label when not being edited, and as a ChoiceBox when in editing mode. The ChoiceBox will, by default, stretch to fill the entire tree cell.

Type Parameters:: T - The type of the elements contained within the TreeView.
Parameters:: items - Zero or more items that will be shown to the user when the ChoiceBox menu is showing. These items must be of the same type as the TreeView<T>, such that upon selection, they replace the existing value in the TreeItem value property.
Returns:: A Callback that will return a TreeCell that is able to work on the type of element contained within the TreeView.

forTreeView

public static <T> Callback<TreeView<T>,TreeCell<T>> forTreeView(ObservableList<T> items)

Type Parameters:: T - The type of the TreeItem elements contained within the TreeView.
Parameters:: items - An ObservableList containing zero or more items that will be shown to the user when the ChoiceBox menu is showing. These items must be of the same type as the TreeView generic type, such that upon selection, they replace the existing value in the TreeItem that is being edited (as noted in the TreeView.editingItemProperty().
Returns:: A Callback that will return a TreeCell that is able to work on the type of element contained within the TreeView.

forTreeView

@SafeVarargs public static <T> Callback<TreeView<T>,TreeCell<T>> forTreeView(StringConverter<T> converter, T... items)

Type Parameters:: T - The type of the elements contained within the TreeView.
Parameters:: converter - A StringConverter to convert the given item (of type T) to a String for displaying to the user.; items - Zero or more items that will be shown to the user when the ChoiceBox menu is showing. These items must be of the same type as the TreeView<T>, such that upon selection, they replace the existing value in the TreeItem value property.
Returns:: A Callback that will return a TreeCell that is able to work on the type of element contained within the TreeView.

forTreeView

public static <T> Callback<TreeView<T>,TreeCell<T>> forTreeView(StringConverter<T> converter, ObservableList<T> items)

Type Parameters:: T - The type of the elements contained within the TreeView.
Parameters:: converter - A StringConverter to convert the given item (of type T) to a String for displaying to the user.; items - An ObservableList containing zero or more items that will be shown to the user when the ChoiceBox menu is showing. These items must be of the same type as the TreeView generic type, such that upon selection, they replace the existing value in the TreeItem that is being edited (as noted in the TreeView.editingItemProperty().
Returns:: A Callback that will return a TreeCell that is able to work on the type of element contained within the TreeView.

converterProperty

public final ObjectProperty<StringConverter<T>> converterProperty()

The StringConverter property.

See Also:: getConverter(), setConverter(StringConverter)

setConverter

public final void setConverter(StringConverter<T> value)

Sets the StringConverter to be used in this cell.

Parameters:: value - the StringConverter to be used in this cell

getConverter

public final StringConverter<T> getConverter()

Returns the StringConverter used in this cell.

Returns:: the StringConverter used in this cell

getItems

public ObservableList<T> getItems()

Returns the items to be displayed in the ChoiceBox when it is showing.

Returns:: the items to be displayed in the ChoiceBox when it is showing

updateItem

public void updateItem(T item, boolean empty)

The updateItem method should not be called by developers, but it is the best method for developers to override to allow for them to customise the visuals of the cell. To clarify, developers should never call this method in their code (they should leave it up to the UI control, such as the ListView control) to call this method. However, the purpose of having the updateItem method is so that developers, when specifying custom cell factories (again, like the ListView cell factory), the updateItem method can be overridden to allow for complete customisation of the cell.

It is very important that subclasses of Cell override the updateItem method properly, as failure to do so will lead to issues such as blank cells or cells with unexpected content appearing within them. Here is an example of how to properly override the updateItem method:

 protected void updateItem(T item, boolean empty) {
     super.updateItem(item, empty);

     if (empty || item == null) {
         setText(null);
         setGraphic(null);
     } else {
         setText(item.toString());
     }
 }

Note in this code sample two important points:

We call the super.updateItem(T, boolean) method. If this is not done, the item and empty properties are not correctly set, and you are likely to end up with graphical issues.
We test for the empty condition, and if true, we set the text and graphic properties to null. If we do not do this, it is almost guaranteed that end users will see graphical artifacts in cells unexpectedly.

Parameters:: item - The new item for the cell.; empty - whether or not this cell represents data from the list. If it is empty, then it does not represent any domain data, but is a cell being used to render an "empty" row.

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Documentation extracted from JavaFX API Documentation.
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