Package eu.webtoolkit.jwt

Class WStackedWidget

java.lang.Object

eu.webtoolkit.jwt.WObject

eu.webtoolkit.jwt.WWidget

eu.webtoolkit.jwt.WWebWidget

eu.webtoolkit.jwt.WInteractWidget

eu.webtoolkit.jwt.WContainerWidget

eu.webtoolkit.jwt.WStackedWidget

public class WStackedWidget
extends WContainerWidget

A container widget that stacks its widgets on top of each other.

This is a container widget which at all times has only one item visible. The widget accomplishes this using setHidden(bool) on the children.

Using getCurrentIndex() and setCurrentIndex() you can retrieve or set the visible widget.

When calling the above setCurrentIndex(), this will fire the currentWidgetChanged() signal. This allows developers to know when the current visible widget has changed and what the new visible widget is.

WStackedWidget, like WContainerWidget, is by default not inline.

CSS

The widget is rendered using an HTML <div> tag and does not provide styling. It can be styled using inline or external CSS as appropriate.

See Also:

• WMenu

Nested Class Summary

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

WObject.FormData

Field Summary

Fields inherited from class eu.webtoolkit.jwt.WInteractWidget

dragTouchEndSlot_, dragTouchSlot_, noDefault

Constructor Summary

Constructors

Constructor	Description
WStackedWidget()	Creates a new stack.
WStackedWidget(WContainerWidget parentContainer)	Creates a new stack.

Method Summary

Modifier and Type	Method	Description
void	addWidget(WWidget widget)	Adds a child widget to this container.
protected DomElement	createDomElement(WApplication app)	Create DOM element for widget.
Signal1<WWidget>	currentWidgetChanged()	Signal which indicates that the current widget was changed.
int	getCurrentIndex()	Returns the index of the widget that is currently shown.
WWidget	getCurrentWidget()	Returns the widget that is currently shown.
protected void	getDomChanges(List<DomElement> result, WApplication app)	Get DOM changes for this widget.
void	insertWidget(int index, WWidget widget)	Insert a widget at a given index.
WWidget	removeWidget(WWidget widget)	Removes a child widget from this container.
protected void	render(EnumSet<RenderFlag> flags)	Renders the widget.
void	setCurrentIndex(int index)	Changes the current widget.
final void	setCurrentIndex(int index, WAnimation animation)	Changes the current widget using a custom animation.
void	setCurrentIndex(int index, WAnimation animation, boolean autoReverse)	Changes the current widget using a custom animation.
void	setCurrentWidget(WWidget widget)	Changes the current widget.
final void	setTransitionAnimation(WAnimation animation)	Specifies an animation used during transitions.
void	setTransitionAnimation(WAnimation animation, boolean autoReverse)	Specifies an animation used during transitions.

Methods inherited from class eu.webtoolkit.jwt.WContainerWidget

clear, getContentAlignment, getCount, getIndexOf, getLayout, getPadding, getScrollLeft, getScrollTop, getWidget, insertBefore, isGlobalUnfocussed, isList, isOrderedList, isUnorderedList, iterateChildren, parentResized, remove, scrolled, setContentAlignment, setContentAlignment, setFormData, setGlobalUnfocused, setLayout, setList, setList, setOverflow, setOverflow, setOverflow, setPadding, setPadding, setPadding

Methods inherited from class eu.webtoolkit.jwt.WInteractWidget

clicked, doubleClicked, enterPressed, escapePressed, gestureChanged, gestureEnded, gestureStarted, getMouseOverDelay, isEnabled, keyPressed, keyWentDown, keyWentUp, load, mouseDragged, mouseMoved, mouseWentDown, mouseWentOut, mouseWentOver, mouseWentUp, mouseWheel, propagateSetEnabled, setDraggable, setDraggable, setDraggable, setDraggable, setMouseOverDelay, setPopup, touchEnded, touchMoved, touchStarted, unsetDraggable

Methods inherited from class eu.webtoolkit.jwt.WWebWidget

addStyleClass, beingDeleted, blurred, callJavaScriptMember, childrenChanged, doJavaScript, enableAjax, escapeText, escapeText, escapeText, escapeText, find, findById, focussed, getAttributeValue, getBaseZIndex, getChildren, getClearSides, getDecorationStyle, getFloatSide, getHeight, getHtmlTagName, getId, getJavaScriptMember, getLineHeight, getMargin, getMaximumHeight, getMaximumWidth, getMinimumHeight, getMinimumWidth, getOffset, getPositionScheme, getScrollVisibilityMargin, getStyleClass, getTabIndex, getToolTip, getVerticalAlignment, getVerticalAlignmentLength, getWidth, hasFocus, hasStyleClass, isCanReceiveFocus, isDisabled, isHidden, isHiddenKeepsGeometry, isInline, isLoaded, isPopup, isRendered, isScrollVisibilityEnabled, isScrollVisible, isSetFirstFocus, isThemeStyleEnabled, isVisible, jsStringLiteral, jsStringLiteral, manageWidget, parentResized, propagateSetVisible, refresh, removeScript, removeStyleClass, resize, scrollVisibilityChanged, setAttributeValue, setBaseZIndex, setCanReceiveFocus, setClearSides, setDecorationStyle, setDeferredToolTip, setDisabled, setFlexBox, setFloatSide, setFocus, setHidden, setHiddenKeepsGeometry, setHtmlTagName, setId, setInline, setJavaScriptMember, setLineHeight, setLoadLaterWhenInvisible, setMargin, setMaximumSize, setMinimumSize, setObjectName, setOffsets, setParentWidget, setPositionScheme, setScrollVisibilityEnabled, setScrollVisibilityMargin, setSelectable, setStyleClass, setTabIndex, setThemeStyleEnabled, setToolTip, setVerticalAlignment, unescapeText, updateSignalConnection, voidEventSignal, widgetAdded, widgetRemoved

Methods inherited from class eu.webtoolkit.jwt.WWidget

acceptDrops, acceptDrops, addCssRule, addCssRule, addJSignal, addStyleClass, animateHide, animateShow, boxBorder, boxPadding, createJavaScript, disable, dropEvent, enable, getDropTouch, getJsRef, getParent, hide, htmlText, isExposed, isGlobalWidget, isLayoutSizeAware, layoutSizeChanged, needsRerender, positionAt, positionAt, 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

getObjectName

Methods inherited from class java.lang.Object

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

Constructor Details

WStackedWidget

public WStackedWidget(WContainerWidget parentContainer)

Creates a new stack.

WStackedWidget

public WStackedWidget()

Creates a new stack.

Calls this((WContainerWidget)null)

Method Details

addWidget

public void addWidget(WWidget widget)

Description copied from class: WContainerWidget

Adds a child widget to this container.

The widget is appended to the list of children, and thus also layed-out at the end.

If, for some reason, you want to be in control of the lifetime of the widget, you can retrieve a unique_ptr with WObject::removeChild()

Overrides:

addWidget in class WContainerWidget

removeWidget

public WWidget removeWidget(WWidget widget)

Description copied from class: WContainerWidget

Removes a child widget from this container.

If the WContainerWidget owns the given widget (i.e. if it was added with addWidget() or insertWidget() and not removed with WObject::removeChild()), a unique_ptr to this widget is returned. Otherwise, this returns nullptr.

Overrides:

removeWidget in class WContainerWidget

getCurrentIndex

public int getCurrentIndex()

Returns the index of the widget that is currently shown.

See Also:

• setCurrentIndex(int index)
• getCurrentWidget()

getCurrentWidget

public WWidget getCurrentWidget()

Returns the widget that is currently shown.

See Also:

• setCurrentWidget(WWidget widget)
• getCurrentIndex()

insertWidget

public void insertWidget(int index,
 WWidget widget)

Insert a widget at a given index.

Overrides:

insertWidget in class WContainerWidget

setCurrentIndex

public void setCurrentIndex(int index)

Changes the current widget.

The widget with index index is made visible, while all other widgets are hidden.

The change of current widget is done using the animation settings specified by setTransitionAnimation().

The default value for current index is 0 if there are child widgets, if no child widgets were added this returns -1.

See Also:

• getCurrentIndex()
• setCurrentWidget(WWidget widget)

setCurrentIndex

public void setCurrentIndex(int index,
 WAnimation animation,
 boolean autoReverse)

Changes the current widget using a custom animation.

See Also:

• getCurrentIndex()
• setCurrentWidget(WWidget widget)

setCurrentIndex

public final void setCurrentIndex(int index,
 WAnimation animation)

Changes the current widget using a custom animation.

Calls setCurrentIndex(index, animation, true)

setCurrentWidget

public void setCurrentWidget(WWidget widget)

Changes the current widget.

The widget widget, which must have been added before, is made visible, while all other widgets are hidden.

See Also:

• getCurrentWidget()
• setCurrentIndex(int index)

setTransitionAnimation

public void setTransitionAnimation(WAnimation animation,
 boolean autoReverse)

Specifies an animation used during transitions.

The animation is used to hide the previously current widget and show the next current widget using setCurrentIndex().

The initial value for animation is WAnimation(), specifying no animation.

When autoReverse is set to true, then the reverse animation is chosen when the new index precedes the current index. This only applies to AnimationEffect.SlideInFromLeft, AnimationEffect.SlideInFromRight, AnimationEffect.SlideInFromTop or AnimationEffect.SlideInFromBottom transition effects.

Note: If you intend to use a transition animation with a WStackedWidget you should set it before it is first rendered. Otherwise, transition animations caused by setCurrentIndex() may not be correctly performed. If you do want to force this change you can use WApplication.processEvents() before calling setCurrentIndex().

Note: It is also not supported to use a AnimationEffect.Pop animation on a WStackedWidget.

See Also:

• setCurrentIndex(int index)

setTransitionAnimation

public final void setTransitionAnimation(WAnimation animation)

Specifies an animation used during transitions.

Calls setTransitionAnimation(animation, false)

currentWidgetChanged

public Signal1<WWidget> currentWidgetChanged()

Signal which indicates that the current widget was changed.

This signal is emitted when the current widget was changed. It holds a pointer to the new current widget. It is emitted every time the setCurrentIndex() or setCurrentWidget() is called.

createDomElement

protected DomElement createDomElement(WApplication app)

Description copied from class: WWebWidget

Create DOM element for widget.

This is an internal function, and should not be called directly, or be overridden!

Overrides:

createDomElement in class WContainerWidget

getDomChanges

protected void getDomChanges(List<DomElement> result,
 WApplication app)

Description copied from class: WWebWidget

Get DOM changes for this widget.

This is an internal function, and should not be called directly, or be overridden!

Overrides:

getDomChanges in class WContainerWidget

render

protected void render(EnumSet<RenderFlag> flags)

Description copied from class: WWidget

Renders the widget.

This function renders the widget (or an update for the widget), after this has been scheduled using scheduleRender().

The default implementation will render the widget by serializing changes to JavaScript and HTML. You may want to reimplement this widget if you have been postponing some of the layout / rendering implementation until the latest moment possible. In that case you should make sure you call the base implementation however.

Overrides:

render in class WWebWidget