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
All MethodsInstance MethodsAbstract MethodsConcrete Methods Modifier and Type Method Description protected VirtualFlow<I>createVirtualFlow()Create the virtualized container that handles the layout and scrolling of all the cells.protected abstract intgetItemCount()Returns the total number of items in this container, including those that are currently hidden because they are out of view.protected VirtualFlow<I>getVirtualFlow()Get the virtualized container.protected voidlayoutChildren(double x, double y, double w, double h)Called during the layout pass of the scenegraph.protected voidmarkItemCountDirty()Call this method to indicate that the item count should be updated on the next pulse.protected abstract voidupdateItemCount()This method is called when it is possible that the item count has changed (i.e.-
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 thegetItemCount()method.
-
createVirtualFlow
protected VirtualFlow<I> createVirtualFlow()
Create the virtualized container that handles the layout and scrolling of all the cells. This enables skin subclasses to provide a customVirtualFlowimplementation. If not overridden, this method intantiates a default VirtualFlow instance.- Returns:
- newly created VirtualFlow instance
- Since:
- 10
-
getVirtualFlow
protected final VirtualFlow<I> getVirtualFlow()
Get the virtualized container. Subclasses can invoke this method to get the VirtualFlow instance.- Returns:
- the virtualized container
- Since:
- 10
-
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:
-
layoutChildrenin classSkinBase<C extends Control> - Parameters:
-
x- the x position -
y- the y position -
w- the width -
h- the height
-
© 2008, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from JavaFX API Documentation.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Java, JavaFX and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
