Module javafx.controls

Package javafx.scene.control.skin

Class VirtualContainerBase<C extends Control,I extends IndexedCell>

java.lang.Object

javafx.scene.control.SkinBase<C>

javafx.scene.control.skin.VirtualContainerBase<C,I>

All Implemented Interfaces:

Skin<C>

Direct Known Subclasses:

ListViewSkin, TableViewSkinBase, TreeViewSkin

public abstract class VirtualContainerBase<C extends Control,I extends IndexedCell>
extends SkinBase<C>

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.

Since:

9

Constructor Summary

Constructors

Constructor	Description
VirtualContainerBase(C control)

Method Summary

Modifier and Type	Method	Description
protected abstract int	getItemCount()	Returns the total number of items in this container, including those that are currently hidden because they are out of view.
protected void	layoutChildren(double x, double y, double w, double h)	Called during the layout pass of the scenegraph.
protected void	markItemCountDirty()	Call this method to indicate that the item count should be updated on the next pulse.
protected abstract void	updateItemCount()	This method is called when it is possible that the item count has changed (i.e. scrolling has occurred, the control has resized, etc).

Methods inherited from class java.lang.Object

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

Methods inherited from class javafx.scene.control.SkinBase

computeBaselineOffset, computeMaxHeight, computeMaxWidth, computeMinHeight, computeMinWidth, computePrefHeight, computePrefWidth, consumeMouseEvents, dispose, executeAccessibleAction, getChildren, getClassCssMetaData, getCssMetaData, getNode, getSkinnable, layoutInArea, layoutInArea, layoutInArea, positionInArea, positionInArea, pseudoClassStateChanged, queryAccessibleAttribute, registerChangeListener, snappedBottomInset, snappedLeftInset, snappedRightInset, snappedTopInset, snapPosition, snapPositionX, snapPositionY, snapSize, snapSizeX, snapSizeY, snapSpace, snapSpaceX, snapSpaceY, unregisterChangeListeners

Constructor Detail

VirtualContainerBase

public VirtualContainerBase(C control)

Parameters:

control - the control

Method Detail

getItemCount

protected abstract int getItemCount()

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

Returns:

the total number of items in this container

updateItemCount

protected abstract void updateItemCount()

This method is called when it is possible that the item count has changed (i.e. scrolling has occurred, the control has resized, etc). This method should recalculate the item count and store that for future use by the getItemCount() method.

markItemCountDirty

protected final void markItemCountDirty()

Call this method to indicate that the item count should be updated on the next pulse.

layoutChildren

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

Called during the layout pass of the scenegraph.

Overrides:

layoutChildren in class SkinBase<C extends Control>

Parameters:

x - the x position

y - the y position

w - the width

h - the height