Package eu.webtoolkit.jwt

Class WTree

java.lang.Object

eu.webtoolkit.jwt.WObject

eu.webtoolkit.jwt.WWidget

eu.webtoolkit.jwt.WCompositeWidget

eu.webtoolkit.jwt.WTree

public class WTree
extends WCompositeWidget

A widget that represents a navigatable tree.

WTree provides a tree widget, and coordinates selection functionality.

Unlike the MVC-based WTreeView, the tree renders a widget hierarchy, rather than a hierarhical standard model. This provides extra flexibility (as any widget can be used as contents), at the cost of server-side, client-side and bandwidth resources (especially for large tree tables).

The tree is implemented as a hierarchy of WTreeNode widgets.

Selection is rendered by calling renderSelected(). Only tree nodes that are selectable may participate in the selection.

A screenshot of the tree:

An example WTree (default)

An example WTree (polished)

See Also:

• WTreeNode
• WTreeTable
• WTreeView

Nested Class Summary

Nested classes/interfaces inherited from class eu.webtoolkit.jwt.WObject

WObject.FormData

Constructor Summary

Constructors

Constructor	Description
WTree()	Creates a new tree.
WTree(WContainerWidget parentContainer)	Creates a new tree.

Method Summary

Modifier and Type	Method	Description
void	clearSelection()	Clears the current selection.
Set<WTreeNode>	getSelectedNodes()	Returns the set of selected tree nodes.
SelectionMode	getSelectionMode()	Returns the selection mode.
WTreeNode	getTreeRoot()	Returns the root node.
boolean	isSelected(WTreeNode node)	Returns if the given node is currently selected.
Signal	itemSelectionChanged()	Signal that is emitted when the selection changes.
final void	select(WTreeNode node)	Selects or unselect the given node.
void	select(WTreeNode node, boolean selected)	Selects or unselect the given node.
void	select(Set<WTreeNode> nodes)	Sets a selection of tree nodes.
void	setSelectionMode(SelectionMode mode)	Sets the selection mode.
void	setTreeRoot(WTreeNode node)	Sets the tree root node.

Methods inherited from class eu.webtoolkit.jwt.WCompositeWidget

addStyleClass, boxBorder, boxPadding, callJavaScriptMember, doJavaScript, enableAjax, find, findById, getAttributeValue, getBaseZIndex, getChildren, getClearSides, getDecorationStyle, getFloatSide, getHeight, getId, getImplementation, getJavaScriptMember, getLineHeight, getMargin, getMaximumHeight, getMaximumWidth, getMinimumHeight, getMinimumWidth, getObjectName, getOffset, getPositionScheme, getScrollVisibilityMargin, getStyleClass, getTabIndex, getTakeImplementation, getToolTip, getVerticalAlignment, getVerticalAlignmentLength, getWidth, hasFocus, hasStyleClass, isCanReceiveFocus, isDisabled, isEnabled, isHidden, isHiddenKeepsGeometry, isInline, isLoaded, isPopup, isScrollVisibilityEnabled, isScrollVisible, isSetFirstFocus, isThemeStyleEnabled, isVisible, load, propagateSetEnabled, propagateSetVisible, refresh, remove, removeStyleClass, removeWidget, render, resize, scrollVisibilityChanged, setAttributeValue, setCanReceiveFocus, setClearSides, setDecorationStyle, setDeferredToolTip, setDisabled, setFloatSide, setFocus, setHidden, setHiddenKeepsGeometry, setId, setImplementation, setInline, setJavaScriptMember, setLineHeight, setMargin, setMaximumSize, setMinimumSize, setObjectName, setOffsets, setPopup, setPositionScheme, setScrollVisibilityEnabled, setScrollVisibilityMargin, setSelectable, setStyleClass, setTabIndex, setThemeStyleEnabled, setToolTip, setVerticalAlignment

Methods inherited from class eu.webtoolkit.jwt.WWidget

acceptDrops, acceptDrops, addCssRule, addCssRule, addJSignal, addStyleClass, animateHide, animateShow, createJavaScript, disable, dropEvent, enable, getDropTouch, getJsRef, getParent, hide, htmlText, isExposed, isGlobalWidget, isLayoutSizeAware, isRendered, layoutSizeChanged, needsRerender, positionAt, positionAt, removeFromParent, removeStyleClass, render, resize, scheduleRender, scheduleRender, scheduleRender, setClearSides, setDeferredToolTip, setFocus, setHeight, setHidden, setLayoutSizeAware, setMargin, setMargin, setMargin, setMargin, setMargin, setOffsets, setOffsets, setOffsets, setOffsets, setOffsets, setToolTip, setVerticalAlignment, setWidth, show, stopAcceptDrops, toggleStyleClass, toggleStyleClass, tr

Methods inherited from class eu.webtoolkit.jwt.WObject

setFormData

Methods inherited from class java.lang.Object

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

Constructor Details

WTree

public WTree(WContainerWidget parentContainer)

Creates a new tree.

WTree

public WTree()

Creates a new tree.

Calls this((WContainerWidget)null)

Method Details

setTreeRoot

public void setTreeRoot(WTreeNode node)

Sets the tree root node.

The initial value is null.

getTreeRoot

public WTreeNode getTreeRoot()

Returns the root node.

See Also:

• setTreeRoot(WTreeNode node)

setSelectionMode

public void setSelectionMode(SelectionMode mode)

Sets the selection mode.

The default selection mode is SelectionMode.None.

getSelectionMode

public SelectionMode getSelectionMode()

Returns the selection mode.

getSelectedNodes

public Set<WTreeNode> getSelectedNodes()

Returns the set of selected tree nodes.

select

public void select(Set<WTreeNode> nodes)

Sets a selection of tree nodes.

select

public void select(WTreeNode node,
 boolean selected)

Selects or unselect the given node.

select

public final void select(WTreeNode node)

Selects or unselect the given node.

Calls select(node, true)

isSelected

public boolean isSelected(WTreeNode node)

Returns if the given node is currently selected.

clearSelection

public void clearSelection()

Clears the current selection.

itemSelectionChanged

public Signal itemSelectionChanged()

Signal that is emitted when the selection changes.