com.sun.javafx.scene.control.skin

Class VirtualContainerBase<C extends Control,B extends BehaviorBase<C>,I extends IndexedCell>

java.lang.Object

javafx.scene.control.SkinBase<C>

com.sun.javafx.scene.control.skin.BehaviorSkinBase<C,B>

com.sun.javafx.scene.control.skin.VirtualContainerBase<C,B,I>

All Implemented Interfaces:

Skin<C>

Direct Known Subclasses:

ListViewSkin, TableViewSkinBase, TreeViewSkin

public abstract class VirtualContainerBase<C extends Control,B extends BehaviorBase<C>,I extends IndexedCell>
extends BehaviorSkinBase<C,B>

Parent class to control skins whose contents are virtualized and scrollable. This class handles the interaction with the VirtualFlow class, which is the main class handling the virtualization of the contents of this container.

Field Summary

Fields

Modifier and Type	Field and Description
protected VirtualFlow<I>	flow The virtualized container which handles the layout and scrolling of all the cells.
protected boolean	rowCountDirty

Fields inherited from class com.sun.javafx.scene.control.skin.BehaviorSkinBase

IS_TOUCH_SUPPORTED

Constructor Summary

Constructors

Constructor and Description
VirtualContainerBase(C control, B behavior)

Method Summary

Modifier and Type	Method and Description
protected void	checkState()
abstract I	createCell() Returns a Cell available to be used in the virtual flow.
protected VirtualFlow<I>	createVirtualFlow() This enables skin subclasses to provide a custom VirtualFlow implementation, rather than have VirtualContainerBase instantiate the default instance.
abstract int	getItemCount() Returns the total number of items in this container, including those that are currently hidden because they are out of view.
(package private) double	getMaxCellWidth(int rowsToCount)
(package private) double	getVirtualFlowPreferredHeight(int rows)
protected void	layoutChildren(double x, double y, double w, double h) Called during the layout pass of the scenegraph.
protected abstract void	updateRowCount()

Methods inherited from class com.sun.javafx.scene.control.skin.BehaviorSkinBase

dispose, getBehavior, handleControlPropertyChanged, registerChangeListener, unregisterChangeListener

Methods inherited from class javafx.scene.control.SkinBase

computeBaselineOffset, computeMaxHeight, computeMaxWidth, computeMinHeight, computeMinWidth, computePrefHeight, computePrefWidth, consumeMouseEvents, executeAccessibleAction, getChildren, getClassCssMetaData, getCssMetaData, getNode, getSkinnable, layoutInArea, layoutInArea, layoutInArea, positionInArea, positionInArea, pseudoClassStateChanged, queryAccessibleAttribute, snappedBottomInset, snappedLeftInset, snappedRightInset, snappedTopInset, snapPosition, snapSize, snapSpace

Methods inherited from class java.lang.Object

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

Field Detail

rowCountDirty

protected boolean rowCountDirty

flow

protected final VirtualFlow<I extends IndexedCell> flow

The virtualized container which handles the layout and scrolling of all the cells.

Constructor Detail

VirtualContainerBase

public VirtualContainerBase(C control,
                            B behavior)

Method Detail

createCell

public abstract I createCell()

Returns a Cell available to be used in the virtual flow. This means you may return either a previously used, but now unrequired cell, or alternatively create a new Cell instance. Preference is obviously given to reusing cells whenever possible, to keep performance costs down.

createVirtualFlow

protected VirtualFlow<I> createVirtualFlow()

This enables skin subclasses to provide a custom VirtualFlow implementation, rather than have VirtualContainerBase instantiate the default instance.

getItemCount

public abstract int getItemCount()

Returns the total number of items in this container, including those that are currently hidden because they are out of view.

updateRowCount

protected abstract void updateRowCount()

getMaxCellWidth

double getMaxCellWidth(int rowsToCount)

getVirtualFlowPreferredHeight

double getVirtualFlowPreferredHeight(int rows)

layoutChildren

protected void layoutChildren(double x,
                              double y,
                              double w,
                              double h)

Description copied from class: SkinBase

Called during the layout pass of the scenegraph.

Overrides:

layoutChildren in class SkinBase<C extends Control>

checkState

protected void checkState()