- java.lang.Object
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- javafx.scene.Node
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- javafx.scene.Parent
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- javafx.scene.layout.Region
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- javafx.scene.control.skin.VirtualFlow<T>
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- All Implemented Interfaces:
Styleable
,EventTarget
public class VirtualFlow<T extends IndexedCell> extends Region
Implementation of a virtualized container using a cell based mechanism. This is used by the skin implementations for UI controls such asListView
,TreeView
,TableView
, andTreeTableView
.- Since:
- 9
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Property Summary
Properties Type Property Description IntegerProperty
cellCount
Indicates the number of cells that should be in the flow.ObjectProperty<Callback<VirtualFlow<T>,T>>
cellFactory
Setting a custom cell factory has the effect of deferring all cell creation, allowing for total customization of the cell.DoubleProperty
fixedCellSize
For optimisation purposes, some use cases can trade dynamic cell length for speed - if fixedCellSize is greater than zero we'll use that rather than determine it by querying the cell itself.BooleanProperty
pannable
Indicates whether the VirtualFlow viewport is capable of being panned by the user (either via the mouse or touch events).DoubleProperty
position
The position of the VirtualFlow within its list of cells.BooleanProperty
vertical
Indicates the primary direction of virtualization.-
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
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Properties declared in class javafx.scene.Parent
needsLayout
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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
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Field Summary
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Fields declared in class javafx.scene.Node
BASELINE_OFFSET_SAME_AS_HEIGHT
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Fields declared in class javafx.scene.layout.Region
USE_COMPUTED_SIZE, USE_PREF_SIZE
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Constructor Summary
Constructors Constructor Description VirtualFlow()
Creates a new VirtualFlow instance.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected void
addAllToPile()
This method will remove all cells from the VirtualFlow and remove them, adding them to the 'pile' (that is, a place from where cells can be used at a later date).IntegerProperty
cellCountProperty()
Indicates the number of cells that should be in the flow.ObjectProperty<Callback<VirtualFlow<T>,T>>
cellFactoryProperty()
Setting a custom cell factory has the effect of deferring all cell creation, allowing for total customization of the cell.DoubleProperty
fixedCellSizeProperty()
For optimisation purposes, some use cases can trade dynamic cell length for speed - if fixedCellSize is greater than zero we'll use that rather than determine it by querying the cell itself.protected T
getAvailableCell(int prefIndex)
Get a cell which can be used in the layout.T
getCell(int index)
Return a cell for the given index.int
getCellCount()
Gets the value of the property cellCount.Callback<VirtualFlow<T>,T>
getCellFactory()
Returns the current cell factory.protected int
getCellIndex(T cell)
Return the index for a given cell.T
getFirstVisibleCell()
Locates and returns the first non-empty IndexedCell that is partially or completely visible.double
getFixedCellSize()
Gets the value of the property fixedCellSize.T
getLastVisibleCell()
Locates and returns the last non-empty IndexedCell that is currently partially or completely visible.double
getPosition()
Gets the value of the property position.T
getVisibleCell(int index)
Gets a cell for the given index if the cell has been created and laid out.boolean
isPannable()
Gets the value of the property pannable.boolean
isVertical()
Gets the value of the property vertical.BooleanProperty
pannableProperty()
Indicates whether the VirtualFlow viewport is capable of being panned by the user (either via the mouse or touch events).DoubleProperty
positionProperty()
The position of the VirtualFlow within its list of cells.void
requestLayout()
Overridden to implement somewhat more efficient support for layout.double
scrollPixels(double delta)
Given a delta value representing a number of pixels, this method attempts to move the VirtualFlow in the given direction (positive is down/right, negative is up/left) the given number of pixels.void
scrollTo(int index)
Adjusts the cells such that the cell in the given index will be fully visible in the viewport.void
scrollTo(T cell)
Adjusts the cells such that the selected cell will be fully visible in the viewport (but only just).void
scrollToBottom(T lastCell)
Adjust the position of cells so that the specified cell will be positioned at the end of the viewport.void
scrollToTop(int index)
Adjusts the cells such that the cell in the given index will be fully visible in the viewport, and positioned at the very top of the viewport.void
scrollToTop(T firstCell)
Adjust the position of cells so that the specified cell will be positioned at the start of the viewport.void
setCellCount(int value)
Sets the value of the property cellCount.void
setCellFactory(Callback<VirtualFlow<T>,T> value)
Sets a new cell factory to use in the VirtualFlow.protected void
setCellIndex(T cell, int index)
The VirtualFlow uses this method to set a cells index (rather than callingIndexedCell.updateIndex(int)
directly), so it is a perfect place for subclasses to override if this if of interest.void
setFixedCellSize(double value)
Sets the value of the property fixedCellSize.void
setPannable(boolean value)
Sets the value of the property pannable.void
setPosition(double value)
Sets the value of the property position.void
setVertical(boolean value)
Sets the value of the property vertical.BooleanProperty
verticalProperty()
Indicates the primary direction of virtualization.-
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, getContentBias, 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, 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
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Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods declared in class javafx.scene.Parent
getBaselineOffset, getChildren, getChildrenUnmodifiable, getManagedChildren, getStylesheets, isNeedsLayout, layout, layoutChildren, needsLayoutProperty, requestParentLayout, setNeedsLayout, updateBounds
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Methods declared in class javafx.scene.layout.Region
backgroundProperty, borderProperty, cacheShapeProperty, centerShapeProperty, computeMaxHeight, computeMaxWidth, computeMinHeight, computeMinWidth, computePrefHeight, computePrefWidth, getBackground, getBorder, getClassCssMetaData, getCssMetaData, 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
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Methods declared in interface javafx.css.Styleable
getStyleableNode, getStyleClass
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Property Detail
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vertical
public final BooleanProperty verticalProperty
Indicates the primary direction of virtualization. If true, then the primary direction of virtualization is vertical, meaning that cells will stack vertically on top of each other. If false, then they will stack horizontally next to each other.- See Also:
isVertical()
,setVertical(boolean)
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pannable
public final BooleanProperty pannableProperty
Indicates whether the VirtualFlow viewport is capable of being panned by the user (either via the mouse or touch events).- See Also:
isPannable()
,setPannable(boolean)
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cellCount
public final IntegerProperty cellCountProperty
Indicates the number of cells that should be in the flow. The user of the VirtualFlow must set this appropriately. When the cell count changes the VirtualFlow responds by updating the visuals. If the items backing the cells change, but the count has not changed, you must call the reconfigureCells() function to update the visuals.- See Also:
getCellCount()
,setCellCount(int)
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position
public final DoubleProperty positionProperty
The position of the VirtualFlow within its list of cells. This is a value between 0 and 1.- See Also:
getPosition()
,setPosition(double)
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fixedCellSize
public final DoubleProperty fixedCellSizeProperty
For optimisation purposes, some use cases can trade dynamic cell length for speed - if fixedCellSize is greater than zero we'll use that rather than determine it by querying the cell itself.- See Also:
getFixedCellSize()
,setFixedCellSize(double)
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cellFactory
public final ObjectProperty<Callback<VirtualFlow<T extends IndexedCell>,T extends IndexedCell>> cellFactoryProperty
Setting a custom cell factory has the effect of deferring all cell creation, allowing for total customization of the cell. Internally, the VirtualFlow is responsible for reusing cells - all that is necessary is for the custom cell factory to return from this function a cell which might be usable for representing any item in the VirtualFlow.
Refer to the
Cell
class documentation for more detail.- See Also:
getCellFactory()
,setCellFactory(Callback)
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Method Detail
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setVertical
public final void setVertical(boolean value)
Sets the value of the property vertical.- Property description:
- Indicates the primary direction of virtualization. If true, then the primary direction of virtualization is vertical, meaning that cells will stack vertically on top of each other. If false, then they will stack horizontally next to each other.
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isVertical
public final boolean isVertical()
Gets the value of the property vertical.- Property description:
- Indicates the primary direction of virtualization. If true, then the primary direction of virtualization is vertical, meaning that cells will stack vertically on top of each other. If false, then they will stack horizontally next to each other.
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verticalProperty
public final BooleanProperty verticalProperty()
Indicates the primary direction of virtualization. If true, then the primary direction of virtualization is vertical, meaning that cells will stack vertically on top of each other. If false, then they will stack horizontally next to each other.- See Also:
isVertical()
,setVertical(boolean)
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isPannable
public final boolean isPannable()
Gets the value of the property pannable.- Property description:
- Indicates whether the VirtualFlow viewport is capable of being panned by the user (either via the mouse or touch events).
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setPannable
public final void setPannable(boolean value)
Sets the value of the property pannable.- Property description:
- Indicates whether the VirtualFlow viewport is capable of being panned by the user (either via the mouse or touch events).
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pannableProperty
public final BooleanProperty pannableProperty()
Indicates whether the VirtualFlow viewport is capable of being panned by the user (either via the mouse or touch events).- See Also:
isPannable()
,setPannable(boolean)
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getCellCount
public final int getCellCount()
Gets the value of the property cellCount.- Property description:
- Indicates the number of cells that should be in the flow. The user of the VirtualFlow must set this appropriately. When the cell count changes the VirtualFlow responds by updating the visuals. If the items backing the cells change, but the count has not changed, you must call the reconfigureCells() function to update the visuals.
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setCellCount
public final void setCellCount(int value)
Sets the value of the property cellCount.- Property description:
- Indicates the number of cells that should be in the flow. The user of the VirtualFlow must set this appropriately. When the cell count changes the VirtualFlow responds by updating the visuals. If the items backing the cells change, but the count has not changed, you must call the reconfigureCells() function to update the visuals.
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cellCountProperty
public final IntegerProperty cellCountProperty()
Indicates the number of cells that should be in the flow. The user of the VirtualFlow must set this appropriately. When the cell count changes the VirtualFlow responds by updating the visuals. If the items backing the cells change, but the count has not changed, you must call the reconfigureCells() function to update the visuals.- See Also:
getCellCount()
,setCellCount(int)
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getPosition
public final double getPosition()
Gets the value of the property position.- Property description:
- The position of the VirtualFlow within its list of cells. This is a value between 0 and 1.
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setPosition
public final void setPosition(double value)
Sets the value of the property position.- Property description:
- The position of the VirtualFlow within its list of cells. This is a value between 0 and 1.
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positionProperty
public final DoubleProperty positionProperty()
The position of the VirtualFlow within its list of cells. This is a value between 0 and 1.- See Also:
getPosition()
,setPosition(double)
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setFixedCellSize
public final void setFixedCellSize(double value)
Sets the value of the property fixedCellSize.- Property description:
- For optimisation purposes, some use cases can trade dynamic cell length for speed - if fixedCellSize is greater than zero we'll use that rather than determine it by querying the cell itself.
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getFixedCellSize
public final double getFixedCellSize()
Gets the value of the property fixedCellSize.- Property description:
- For optimisation purposes, some use cases can trade dynamic cell length for speed - if fixedCellSize is greater than zero we'll use that rather than determine it by querying the cell itself.
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fixedCellSizeProperty
public final DoubleProperty fixedCellSizeProperty()
For optimisation purposes, some use cases can trade dynamic cell length for speed - if fixedCellSize is greater than zero we'll use that rather than determine it by querying the cell itself.- See Also:
getFixedCellSize()
,setFixedCellSize(double)
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setCellFactory
public final void setCellFactory(Callback<VirtualFlow<T>,T> value)
Sets a new cell factory to use in the VirtualFlow. This forces all old cells to be thrown away, and new cells to be created with the new cell factory.- Parameters:
value
- the new cell factory
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getCellFactory
public final Callback<VirtualFlow<T>,T> getCellFactory()
Returns the current cell factory.- Returns:
- the current cell factory
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cellFactoryProperty
public final ObjectProperty<Callback<VirtualFlow<T>,T>> cellFactoryProperty()
Setting a custom cell factory has the effect of deferring all cell creation, allowing for total customization of the cell. Internally, the VirtualFlow is responsible for reusing cells - all that is necessary is for the custom cell factory to return from this function a cell which might be usable for representing any item in the VirtualFlow.
Refer to the
Cell
class documentation for more detail.- See Also:
getCellFactory()
,setCellFactory(Callback)
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requestLayout
public void requestLayout()
Overridden to implement somewhat more efficient support for layout. The VirtualFlow can generally be considered as being unmanaged, in that whenever the position changes, or other such things change, we need to perform a layout but there is no reason to notify the parent. However when things change which may impact the preferred size (such as vertical, createCell, and configCell) then we need to notify the parent.- Overrides:
requestLayout
in classParent
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getAvailableCell
protected T getAvailableCell(int prefIndex)
Get a cell which can be used in the layout. This function will reuse cells from the pile where possible, and will create new cells when necessary.- Parameters:
prefIndex
- the preferred index- Returns:
- the available cell
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addAllToPile
protected void addAllToPile()
This method will remove all cells from the VirtualFlow and remove them, adding them to the 'pile' (that is, a place from where cells can be used at a later date). This method is protected to allow subclasses to clean up appropriately.
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getVisibleCell
public T getVisibleCell(int index)
Gets a cell for the given index if the cell has been created and laid out. "Visible" is a bit of a misnomer, the cell might not be visible in the viewport (it may be clipped), but does distinguish between cells that have been created and are in use vs. those that are in the pile or not created.- Parameters:
index
- the index- Returns:
- the visible cell
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getLastVisibleCell
public T getLastVisibleCell()
Locates and returns the last non-empty IndexedCell that is currently partially or completely visible. This function may return null if there are no cells, or if the viewport length is 0.- Returns:
- the last visible cell
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getFirstVisibleCell
public T getFirstVisibleCell()
Locates and returns the first non-empty IndexedCell that is partially or completely visible. This really only ever returns null if there are no cells or the viewport length is 0.- Returns:
- the first visible cell
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scrollToTop
public void scrollToTop(T firstCell)
Adjust the position of cells so that the specified cell will be positioned at the start of the viewport. The given cell must already be "live".- Parameters:
firstCell
- the first cell
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scrollToBottom
public void scrollToBottom(T lastCell)
Adjust the position of cells so that the specified cell will be positioned at the end of the viewport. The given cell must already be "live".- Parameters:
lastCell
- the last cell
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scrollTo
public void scrollTo(T cell)
Adjusts the cells such that the selected cell will be fully visible in the viewport (but only just).- Parameters:
cell
- the cell
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scrollTo
public void scrollTo(int index)
Adjusts the cells such that the cell in the given index will be fully visible in the viewport.- Parameters:
index
- the index
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scrollToTop
public void scrollToTop(int index)
Adjusts the cells such that the cell in the given index will be fully visible in the viewport, and positioned at the very top of the viewport.- Parameters:
index
- the index
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scrollPixels
public double scrollPixels(double delta)
Given a delta value representing a number of pixels, this method attempts to move the VirtualFlow in the given direction (positive is down/right, negative is up/left) the given number of pixels. It returns the number of pixels actually moved.- Parameters:
delta
- the delta value- Returns:
- the number of pixels actually moved
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getCell
public T getCell(int index)
Return a cell for the given index. This may be called for any cell, including beyond the range defined by cellCount, in which case an empty cell will be returned. The returned value should not be stored for any reason.- Parameters:
index
- the index- Returns:
- the cell
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setCellIndex
protected void setCellIndex(T cell, int index)
The VirtualFlow uses this method to set a cells index (rather than callingIndexedCell.updateIndex(int)
directly), so it is a perfect place for subclasses to override if this if of interest.- Parameters:
cell
- The cell whose index will be updated.index
- The new index for the cell.
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getCellIndex
protected int getCellIndex(T cell)
Return the index for a given cell. This allows subclasses to customise how cell indices are retrieved.- Parameters:
cell
- the cell- Returns:
- the index
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