javafx.scene.control.skin

Class VirtualContainerBase<C extends Control,I extends IndexedCell>

java.lang.Object

<any>

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

Direct Known Subclasses:

ListViewSkin, TableViewSkinBase, TreeViewSkin

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

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

Field Summary

Fields

Modifier and Type	Field and Description
private VirtualFlow<I>	flow The virtualized container which handles the layout and scrolling of all the cells.
private boolean	itemCountDirty * Private fields * *

Constructor Summary

Constructors

Constructor and Description
VirtualContainerBase(C control)

Method Summary

Modifier and Type	Method and Description
(package private) void	checkState()
protected VirtualFlow<I>	createVirtualFlow() Create the virtualized container that handles the layout and scrolling of all the cells.
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.
(package private) double	getMaxCellWidth(int rowsToCount) * Private methods * *
protected VirtualFlow<I>	getVirtualFlow() Get the virtualized container.
(package private) double	getVirtualFlowPreferredHeight(int rows)
protected void	layoutChildren(double x, double y, double w, double h)
protected void	markItemCountDirty() Call this method to indicate that the item count should be updated on the next pulse.
(package private) void	requestRebuildCells()
protected abstract void	updateItemCount() This method is called when it is possible that the item count has changed (i.e.

Methods inherited from class java.lang.Object

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

Field Detail

itemCountDirty

private boolean itemCountDirty

* Private fields * *

flow

private 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)

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.

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 custom VirtualFlow implementation. 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)

getMaxCellWidth

double getMaxCellWidth(int rowsToCount)

* Private methods * *

getVirtualFlowPreferredHeight

double getVirtualFlowPreferredHeight(int rows)

checkState

void checkState()

requestRebuildCells

void requestRebuildCells()