java.lang.Object
javafx.scene.control.SkinBase<C>
javafx.scene.control.skin.VirtualContainerBase<ListView<T>,ListCell<T>>
javafx.scene.control.skin.ListViewSkin<T>
public class ListViewSkin<T> extends VirtualContainerBase<ListView<T>,ListCell<T>>
Default skin implementation for the
ListView
control.- Since:
- 9
- See Also:
ListView
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Constructor Summary
Constructors Constructor Description ListViewSkin(ListView<T> control)
Creates a new ListViewSkin instance, installing the necessary child nodes into the Controlchildren
list, as well as the necessary input mappings for handling key, mouse, etc events. -
Method Summary
Modifier and Type Method Description protected double
computePrefHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset)
Calculates the preferred height of thisSkinBase
.protected double
computePrefWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset)
Calculates the preferred width of thisSkinBase
.void
dispose()
Called by a Skinnable when the Skin is replaced on the Skinnable.protected void
executeAccessibleAction(AccessibleAction action, Object... parameters)
This method is called by the assistive technology to request the action indicated by the argument should be executed.protected 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 Object
queryAccessibleAttribute(AccessibleAttribute attribute, Object... parameters)
This method is called by the assistive technology to request the value for an attribute.protected void
updateItemCount()
This method is called when it is possible that the item count has changed (i.e.Methods inherited from class javafx.scene.control.skin.VirtualContainerBase
createVirtualFlow, getVirtualFlow, markItemCountDirty
Methods inherited from class javafx.scene.control.SkinBase
computeBaselineOffset, computeMaxHeight, computeMaxWidth, computeMinHeight, computeMinWidth, consumeMouseEvents, getChildren, getClassCssMetaData, getCssMetaData, getNode, getSkinnable, layoutInArea, layoutInArea, layoutInArea, positionInArea, positionInArea, pseudoClassStateChanged, registerChangeListener, snappedBottomInset, snappedLeftInset, snappedRightInset, snappedTopInset, snapPosition, snapPositionX, snapPositionY, snapSize, snapSizeX, snapSizeY, snapSpace, snapSpaceX, snapSpaceY, unregisterChangeListeners
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Constructor Details
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ListViewSkin
Creates a new ListViewSkin instance, installing the necessary child nodes into the Controlchildren
list, as well as the necessary input mappings for handling key, mouse, etc events.- Parameters:
control
- The control that this skin should be installed onto.
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Method Details
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dispose
public void dispose()Called by a Skinnable when the Skin is replaced on the Skinnable. This method allows a Skin to implement any logic necessary to clean up itself after the Skin is no longer needed. It may be used to release native resources. The methodsSkin.getSkinnable()
andSkin.getNode()
should return null following a call to dispose. Calling dispose twice has no effect.Overridden to remove EventHandler.
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layoutChildren
protected void layoutChildren(double x, double y, double w, double h)Called during the layout pass of the scenegraph.- Overrides:
layoutChildren
in classVirtualContainerBase<ListView<T>,ListCell<T>>
- Parameters:
x
- the x positiony
- the y positionw
- the widthh
- the height
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computePrefWidth
protected double computePrefWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset)Calculates the preferred width of thisSkinBase
. The default implementation calculates this width as the width of the area occupied by its managed children when they are positioned at their current positions at their preferred widths.- Overrides:
computePrefWidth
in classSkinBase<ListView<T>>
- Parameters:
height
- the height that should be used if preferred width depends on ittopInset
- the pixel snapped top insetrightInset
- the pixel snapped right insetbottomInset
- the pixel snapped bottom insetleftInset
- the pixel snapped left inset- Returns:
- the calculated preferred width
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computePrefHeight
protected double computePrefHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset)Calculates the preferred height of thisSkinBase
. The default implementation calculates this height as the height of the area occupied by its managed children when they are positioned at their current positions at their preferred heights.- Overrides:
computePrefHeight
in classSkinBase<ListView<T>>
- Parameters:
width
- the width that should be used if preferred height depends on ittopInset
- the pixel snapped top insetrightInset
- the pixel snapped right insetbottomInset
- the pixel snapped bottom insetleftInset
- the pixel snapped left inset- Returns:
- the calculated preferred height
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getItemCount
protected int getItemCount()Returns the total number of items in this container, including those that are currently hidden because they are out of view.- Specified by:
getItemCount
in classVirtualContainerBase<ListView<T>,ListCell<T>>
- Returns:
- the total number of items in this container
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updateItemCount
protected 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 theVirtualContainerBase.getItemCount()
method.- Specified by:
updateItemCount
in classVirtualContainerBase<ListView<T>,ListCell<T>>
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queryAccessibleAttribute
This method is called by the assistive technology to request the value for an attribute.This method is commonly overridden by subclasses to implement attributes that are required for a specific role.
If a particular attribute is not handled, the superclass implementation must be called.- Overrides:
queryAccessibleAttribute
in classSkinBase<ListView<T>>
- Parameters:
attribute
- the requested attributeparameters
- optional list of parameters- Returns:
- the value for the requested attribute
- See Also:
AccessibleAttribute
,Node.queryAccessibleAttribute(javafx.scene.AccessibleAttribute, java.lang.Object...)
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executeAccessibleAction
This method is called by the assistive technology to request the action indicated by the argument should be executed.This method is commonly overridden by subclasses to implement action that are required for a specific role.
If a particular action is not handled, the superclass implementation must be called.- Overrides:
executeAccessibleAction
in classSkinBase<ListView<T>>
- Parameters:
action
- the action to executeparameters
- optional list of parameters- See Also:
AccessibleAction
,Node.executeAccessibleAction(javafx.scene.AccessibleAction, java.lang.Object...)
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