Wt  4.0.2
Public Member Functions | Protected Member Functions | List of all members
Wt::WText Class Reference

A widget that renders (XHTML) text. More...

#include <Wt/WText.h>

Inheritance diagram for Wt::WText:
Inheritance graph
[legend]

Public Member Functions

 WText ()
 Creates a text widget with an empty text.
 
 WText (const WString &text)
 Creates a text widget with given text. More...
 
 WText (const WString &text, TextFormat textFormat)
 Creates a text widget with given text and format. More...
 
 ~WText ()
 Destructor.
 
const WStringtext () const
 Returns the text. More...
 
bool setText (const WString &text)
 Sets the text. More...
 
bool setTextFormat (TextFormat format)
 Sets the text format. More...
 
TextFormat textFormat () const
 Returns the text format. More...
 
void setWordWrap (bool wordWrap)
 Configures word wrapping. More...
 
bool wordWrap () const
 Returns whether the widget may break lines. More...
 
void setTextAlignment (AlignmentFlag textAlignment)
 Specifies how text is aligned. More...
 
AlignmentFlag textAlignment () const
 Returns the alignment of children. More...
 
void setPadding (const WLength &padding, WFlags< Side > sides=Side::Left|Side::Right)
 Sets padding inside the widget. More...
 
WLength padding (Side side) const
 Returns the padding set for the widget. More...
 
void setInternalPathEncoding (bool enabled)
 Enables internal path encoding of anchors in the XHTML text. More...
 
bool hasInternalPathEncoding () const
 Returns whether internal paths are encoded. More...
 
virtual void refresh () override
 Refresh the widget. More...
 
- Public Member Functions inherited from Wt::WInteractWidget
 WInteractWidget ()
 Create an InteractWidget.
 
EventSignal< WKeyEvent > & keyWentDown ()
 Event signal emitted when a keyboard key is pushed down. More...
 
EventSignal< WKeyEvent > & keyPressed ()
 Event signal emitted when a "character" was entered. More...
 
EventSignal< WKeyEvent > & keyWentUp ()
 Event signal emitted when a keyboard key is released. More...
 
EventSignalenterPressed ()
 Event signal emitted when enter was pressed. More...
 
EventSignalescapePressed ()
 Event signal emitted when escape was pressed. More...
 
EventSignal< WMouseEvent > & clicked ()
 Event signal emitted when a mouse key was clicked on this widget. More...
 
EventSignal< WMouseEvent > & doubleClicked ()
 Event signal emitted when a mouse key was double clicked on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentDown ()
 Event signal emitted when a mouse key was pushed down on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentUp ()
 Event signal emitted when a mouse key was released on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentOut ()
 Event signal emitted when the mouse went out of this widget. More...
 
EventSignal< WMouseEvent > & mouseWentOver ()
 Event signal emitted when the mouse entered this widget. More...
 
EventSignal< WMouseEvent > & mouseMoved ()
 Event signal emitted when the mouse moved over this widget. More...
 
EventSignal< WMouseEvent > & mouseDragged ()
 Event signal emitted when the mouse is dragged over this widget. More...
 
EventSignal< WMouseEvent > & mouseWheel ()
 Event signal emitted when the mouse scroll wheel was used. More...
 
EventSignal< WTouchEvent > & touchStarted ()
 Event signal emitted when a finger is placed on the screen. More...
 
EventSignal< WTouchEvent > & touchEnded ()
 Event signal emitted when a finger is removed from the screen. More...
 
EventSignal< WTouchEvent > & touchMoved ()
 Event signal emitted when a finger, which is already placed on the screen, is moved across the screen. More...
 
EventSignal< WGestureEvent > & gestureStarted ()
 Event signal emitted when a gesture is started. More...
 
EventSignal< WGestureEvent > & gestureChanged ()
 Event signal emitted when a gesture is changed. More...
 
EventSignal< WGestureEvent > & gestureEnded ()
 Event signal emitted when a gesture is ended. More...
 
void setDraggable (const std::string &mimeType, WWidget *dragWidget=nullptr, bool isDragWidgetOnly=false, WObject *sourceWidget=nullptr)
 Configure dragging for drag and drop. More...
 
void unsetDraggable ()
 Disable drag & drop for this widget. More...
 
void setMouseOverDelay (int delay)
 Sets a delay for the mouse over event. More...
 
int mouseOverDelay () const
 Returns the mouse over signal delay. More...
 
virtual void setPopup (bool popup) override
 Lets the widget overlay over other sibling widgets. More...
 
virtual void load () override
 Loads content just before the widget is used. More...
 
virtual bool isEnabled () const override
 Returns whether the widget is enabled. More...
 
- Public Member Functions inherited from Wt::WWebWidget
 WWebWidget ()
 Construct a WebWidget.
 
virtual std::vector< WWidget * > children () const override
 Returns child widgets. More...
 
SignalchildrenChanged ()
 Signal emitted when children have been added or removed. More...
 
virtual void setPositionScheme (PositionScheme scheme) override
 Sets the CSS position scheme. More...
 
virtual PositionScheme positionScheme () const override
 Returns the CSS position scheme. More...
 
virtual void setOffsets (const WLength &offset, WFlags< Side > sides=AllSides) override
 Sets CSS offsets for a non-statically positioned widget. More...
 
virtual WLength offset (Side s) const override
 Returns a CSS offset. More...
 
virtual void resize (const WLength &width, const WLength &height) override
 Resizes the widget. More...
 
virtual WLength width () const override
 Returns the width. More...
 
virtual WLength height () const override
 Returns the height. More...
 
virtual void setMinimumSize (const WLength &width, const WLength &height) override
 Sets a minimum size. More...
 
virtual WLength minimumWidth () const override
 Returns the minimum width. More...
 
virtual WLength minimumHeight () const override
 Returns the minimum height. More...
 
virtual void setMaximumSize (const WLength &width, const WLength &height) override
 Sets a maximum size. More...
 
virtual WLength maximumWidth () const override
 Returns the maximum width. More...
 
virtual WLength maximumHeight () const override
 Returns the maximum height. More...
 
virtual void setLineHeight (const WLength &height) override
 Sets the CSS line height for contained text.
 
virtual WLength lineHeight () const override
 Returns the CSS line height for contained text. More...
 
virtual void setFloatSide (Side s) override
 Specifies a CSS float side. More...
 
virtual Side floatSide () const override
 Returns the CSS float side. More...
 
virtual void setClearSides (WFlags< Side > sides) override
 Sets the sides that should be cleared of floats. More...
 
virtual WFlags< SideclearSides () const override
 Returns the sides that should remain empty. More...
 
virtual void setMargin (const WLength &margin, WFlags< Side > sides=AllSides) override
 Sets CSS margins around the widget. More...
 
virtual WLength margin (Side side) const override
 Returns a CSS margin set. More...
 
virtual void setHiddenKeepsGeometry (bool enabled) override
 Sets whether the widget keeps its geometry when hidden. More...
 
virtual bool hiddenKeepsGeometry () const override
 Returns whether the widget keeps its geometry when hidden. More...
 
virtual void setHidden (bool hidden, const WAnimation &animation=WAnimation()) override
 Hides or shows the widget. More...
 
virtual bool isHidden () const override
 Returns whether the widget is set hidden. More...
 
virtual bool isVisible () const override
 Returns whether the widget is visible. More...
 
virtual void setDisabled (bool disabled) override
 Sets whether the widget is disabled. More...
 
virtual bool isDisabled () const override
 Returns whether the widget is set disabled. More...
 
virtual bool isPopup () const override
 Returns whether the widget is overlayed. More...
 
virtual void setInline (bool isInline) override
 Sets whether the widget is displayed inline or as a block. More...
 
virtual bool isInline () const override
 Returns whether the widget is displayed inline or as block. More...
 
virtual void setDecorationStyle (const WCssDecorationStyle &style) override
 Sets a CSS decoration style. More...
 
virtual WCssDecorationStyledecorationStyle () override
 Returns the decoration style of this widget. More...
 
virtual void setStyleClass (const WString &styleClass) override
 Sets (one or more) CSS style classes. More...
 
virtual WString styleClass () const override
 Returns the CSS style class. More...
 
virtual void addStyleClass (const WString &styleClass, bool force=false) override
 Adds a CSS style class. More...
 
virtual void removeStyleClass (const WString &styleClass, bool force=false) override
 Removes a CSS style class. More...
 
virtual bool hasStyleClass (const WString &styleClass) const override
 Returns whether the widget has a style class.
 
virtual void setVerticalAlignment (AlignmentFlag alignment, const WLength &length=WLength()) override
 Sets the vertical alignment. More...
 
virtual AlignmentFlag verticalAlignment () const override
 Returns the vertical alignment. More...
 
virtual WLength verticalAlignmentLength () const override
 Returns the fixed vertical alignment that was set. More...
 
virtual void setToolTip (const WString &text, TextFormat textFormat=TextFormat::Plain) override
 Sets a tooltip. More...
 
virtual void setDeferredToolTip (bool enable, TextFormat textFormat=TextFormat::Plain) override
 Enable deferred tooltip. More...
 
virtual WString toolTip () const override
 Returns the tooltip.
 
virtual void setAttributeValue (const std::string &name, const WString &value) override
 Sets an attribute value. More...
 
virtual WString attributeValue (const std::string &name) const override
 Returns an attribute value. More...
 
virtual void setJavaScriptMember (const std::string &name, const std::string &value) override
 Sets a JavaScript member. More...
 
virtual std::string javaScriptMember (const std::string &name) const override
 Returns the value of a JavaScript member. More...
 
virtual void callJavaScriptMember (const std::string &name, const std::string &args) override
 Calls a JavaScript member. More...
 
virtual bool loaded () const override
 Returns whether this widget has been loaded. More...
 
virtual void setId (const std::string &id) override
 Sets the CSS Id. More...
 
virtual WWidgetfind (const std::string &name) override
 Finds a descendent widget by name. More...
 
virtual WWidgetfindById (const std::string &id) override
 Finds a descendent widget by id.
 
virtual void setSelectable (bool selectable) override
 Sets as selectable. More...
 
virtual void doJavaScript (const std::string &javascript) override
 Executes the given JavaScript statements when the widget is rendered or updated. More...
 
virtual const std::string id () const override
 Returns the (unique) identifier for this object. More...
 
void setLoadLaterWhenInvisible (bool)
 Change the way the widget is loaded when invisible. More...
 
std::string htmlTagName () const
 returns the current html tag name More...
 
void setHtmlTagName (const std::string &tag)
 set the custom HTML tag name More...
 
virtual void setCanReceiveFocus (bool enabled) override
 Sets whether the widget can receive focus. More...
 
virtual bool canReceiveFocus () const override
 Returns whether the widget can receive focus. More...
 
virtual bool setFirstFocus () override
 Set focus on the widget's first descendant. More...
 
virtual void setFocus (bool focus) override
 Sets focus. More...
 
virtual bool hasFocus () const override
 Returns whether the widget currently has the focus.
 
virtual void setTabIndex (int index) override
 Sets the tab index. More...
 
virtual int tabIndex () const override
 Returns the tab index. More...
 
EventSignalblurred ()
 Signal emitted when the widget lost focus. More...
 
EventSignalfocussed ()
 Signal emitted when the widget recieved focus. More...
 
virtual bool scrollVisibilityEnabled () const finaloverride
 Returns whether scroll visibility detection is enabled for this widget. More...
 
virtual void setScrollVisibilityEnabled (bool enabled) finaloverride
 Sets whether scroll visibility detection is enabled for this widget. More...
 
virtual int scrollVisibilityMargin () const finaloverride
 Returns the margin around the viewport within which the widget is considered visible. More...
 
virtual void setScrollVisibilityMargin (int margin) finaloverride
 Sets the margin around the viewport within which the widget is considered visible. More...
 
virtual Signal< bool > & scrollVisibilityChanged () finaloverride
 Signal triggered when the scroll visibility of this widget changes. More...
 
virtual bool isScrollVisible () const finaloverride
 Returns whether this widget is currently considered scroll visible. More...
 
virtual void setThemeStyleEnabled (bool enabled) finaloverride
 Sets whether theme styling for a widget is enabled or disabled. More...
 
virtual bool isThemeStyleEnabled () const finaloverride
 Returns whether this widget is currently styled by the chosen theme. More...
 
virtual void setObjectName (const std::string &name) override
 Sets an object name. More...
 
- Public Member Functions inherited from Wt::WWidget
virtual ~WWidget ()
 Destructor. More...
 
WWidgetparent () const
 Returns the parent widget.
 
virtual std::unique_ptr< WWidgetremoveWidget (WWidget *widget)
 Removes a child widget.
 
std::unique_ptr< WWidgetremoveFromParent ()
 Removes the widget from its parent. More...
 
void setWidth (const WLength &width)
 Sets the width. More...
 
void setHeight (const WLength &height)
 Sets the height. More...
 
virtual void positionAt (const WWidget *widget, Orientation orientation=Orientation::Vertical)
 Positions a widget next to another widget. More...
 
virtual void toggleStyleClass (const WString &styleClass, bool add, bool force=false)
 Toggles a CSS style class.
 
std::string jsRef () const
 Returns a JavaScript expression to the corresponding DOM node. More...
 
void setFocus ()
 Sets focus. More...
 
virtual void acceptDrops (const std::string &mimeType, const WString &hoverStyleClass=WString())
 Sets a mime type to be accepted for dropping. More...
 
virtual void stopAcceptDrops (const std::string &mimeType)
 Indicates that a mime type is no longer accepted for dropping. More...
 
virtual void htmlText (std::ostream &out)
 Streams the (X)HTML representation. More...
 
bool isRendered () const
 Returns whether the widget is rendered. More...
 
void hide ()
 Hides the widget. More...
 
void animateHide (const WAnimation &animation)
 Hides the widget using an animation. More...
 
void show ()
 Shows the widget. More...
 
void animateShow (const WAnimation &animation)
 Shows the widget using an animation. More...
 
void enable ()
 Enables the widget. More...
 
void disable ()
 Disable thes widget. More...
 
bool layoutSizeAware () const
 Returns whether the widget is layout size aware. More...
 
- Public Member Functions inherited from Wt::WObject
void addChild (std::unique_ptr< WObject > child)
 Add a child WObject whose lifetime is determined by this WObject.
 
template<typename Child >
Child * addChild (std::unique_ptr< Child > child)
 Add a child WObject, returning a raw pointer. More...
 
std::unique_ptr< WObjectremoveChild (WObject *child)
 Remove a child WObject, so its lifetime is no longer determined by this WObject.
 
virtual std::string objectName () const
 Returns the object name. More...
 
void resetLearnedSlots ()
 Resets learned stateless slot implementations. More...
 
template<class T >
void resetLearnedSlot (void(T::*method)())
 Resets a learned stateless slot implementation. More...
 
template<class T >
WStatelessSlot * implementStateless (void(T::*method)())
 Declares a slot to be stateless and learn client-side behaviour on first invocation. More...
 
template<class T >
WStatelessSlot * implementStateless (void(T::*method)(), void(T::*undoMethod)())
 Declares a slot to be stateless and learn client-side behaviour in advance. More...
 
void isNotStateless ()
 Marks the current function as not stateless. More...
 
template<class T >
WStatelessSlot * implementJavaScript (void(T::*method)(), const std::string &jsCode)
 Provides a JavaScript implementation for a method. More...
 
- Public Member Functions inherited from Wt::Core::observable
 observable () noexcept
 Default constructor.
 
virtual ~observable ()
 Destructor. More...
 

Protected Member Functions

virtual void render (WFlags< RenderFlag > flags) override
 Renders the widget. More...
 
- Protected Member Functions inherited from Wt::WInteractWidget
virtual void propagateSetEnabled (bool enabled) override
 Propagates that a widget was enabled or disabled through children. More...
 
- Protected Member Functions inherited from Wt::WWebWidget
virtual void enableAjax () override
 Progresses to an Ajax-enabled widget. More...
 
virtual WStatelessSlot * getStateless (Method method) override
 On-demand stateless slot implementation. More...
 
- Protected Member Functions inherited from Wt::WWidget
void setLayoutSizeAware (bool sizeAware)
 Sets the widget to be aware of its size set by a layout manager. More...
 
virtual void layoutSizeChanged (int width, int height)
 Virtual method that indicates a size change. More...
 
 WWidget ()
 Creates a widget.
 
virtual void dropEvent (WDropEvent dropEvent)
 Handles a drop event. More...
 
virtual int boxPadding (Orientation orientation) const
 Returns the widget's built-in padding. More...
 
virtual int boxBorder (Orientation orientation) const
 Returns the widget's built-in border width. More...
 
void scheduleRender (WFlags< RepaintFlag > flags=None)
 Schedules rerendering of the widget. More...
 

Additional Inherited Members

- Public Types inherited from Wt::WObject
typedef void(WObject::* Method) ()
 Typedef for a WObject method without arguments.
 
- Static Public Member Functions inherited from Wt::WWebWidget
static std::string jsStringLiteral (const std::string &v, char delimiter= '\'')
 Turn a CharEncoding::UTF8 encoded string into a JavaScript string literal. More...
 
- Static Public Member Functions inherited from Wt::WWidget
static WString tr (const char *key)
 Short hand for WString::tr() More...
 

Detailed Description

A widget that renders (XHTML) text.

The text is provided through a WString, which may either hold a literal text, or a key to localized text which is looked up in locale dependent XML files (see WString::tr()).

Use setTextFormat() to configure the textFormat of the text. The default textFormat is Wt::TextFormat::XHTML, which allows XHMTL markup to be included in the text. Tags and attributes that indicate "active" content are not allowed and stripped out, to avoid security risks exposed by JavaScript such as the common web-based Cross-Site Scripting (XSS) malicious attack. XSS is the situation where one user of your web application is able to execute a script in another user's browser while your application only intended to display a message entered by the mailicious user to the other user. To defeat this attack, Wt assumes that content in a WText is intended to be passive, and not contain any scripting elements.

The Wt::TextFormat::XHTML format will automatically change to Wt::TextFormat::Plain if the text is not valid XML. Properly formatted HTML, which is not valid XHTML (e.g. a
tag without closing tag) will thus be shown literally, since the HTML markup will be escaped. Wt does this as a safety measure, since it cannot reliably run the XSS filter without parsing the XML successfully.

The Wt::TextFormat::Plain format will display the text literally (escaping any HTML special characters).

In some situations, Wt::TextFormat::UnsafeXHTML may be useful to explicitly allow scripting content. Like TextFormat::XHTML, it allows XHTML markup, but it also allows potentially dangerous tags and attributes. Use this if you're sure that a user cannot interfere with the text set, and TextFormat::XHTML is too limiting.

WText is by default inline, unless the XHTML contents starts with an element such as <div>, <h> or <p> that is displayed as a block, in which case the widget will also display as a block.

Usage examples:

auto container = std::make_unique<Wt::WContainerWidget>();
// display an XHTML text:
container->addWidget(
std::make_unique<Wt::WText>("Hello <i>dear</i> visitor."));
// display a plain text:
container->addWidget(
std::make_unique<Wt::WText>("The <i> tag displays italic text.", Wt::TextFormat::Plain));
// display an XHTML fragment from a resource bundle:
container->addWidget(
std::make_unique<Wt::WText>(tr("introduction")));

CSS

The widget corresponds to an HTML <span> tag or an HTML <div> depending on whether the widget is inline.

This widget does not provide styling, and can be styled using inline or external CSS as appropriate.

See also
WApplication::setLocale()
WApplication::messageResourceBundle()

Constructor & Destructor Documentation

Wt::WText::WText ( const WString text)

Creates a text widget with given text.

The textFormat is set to Wt::TextFormat::XHTML, unless the text is literal (not created using WString::tr()) and it could not be parsed as valid XML. In that case the textFormat is set to Wt::TextFormat::Plain.

Therefore, if you wish to use Wt::TextFormat::XHTML, but cannot be sure about text being valid XML, you should verify that the textFormat() is Wt::TextFormat::XHTML after construction.

The XML parser will silently discard malicious tags and attributes for literal Wt::TextFormat::XHTML text.

Wt::WText::WText ( const WString text,
TextFormat  textFormat 
)

Creates a text widget with given text and format.

If textFormat is Wt::TextFormat::XHTML and text is not literal (not created using WString::tr()), then if the text could not be parsed as valid XML, the textFormat is changed to Wt::TextFormat::Plain.

Therefore, if you wish to use Wt::TextFormat::XHTML, but cannot be sure about text being valid XML, you should verify that the textFormat() is Wt::TextFormat::XHTML after construction.

The XML parser will silently discard malicious tags and attributes for literal Wt::TextFormat::XHTML text.

Member Function Documentation

bool Wt::WText::hasInternalPathEncoding ( ) const

Returns whether internal paths are encoded.

See also
setInternalPathEncoding()
WLength Wt::WText::padding ( Side  side) const

Returns the padding set for the widget.

See also
setPadding(const WLength&, WFlags<Side>)
void Wt::WText::refresh ( )
overridevirtual

Refresh the widget.

The refresh method is invoked when the locale is changed using WApplication::setLocale() or when the user hit the refresh button.

The widget must actualize its contents in response.

Note
This does *not* rerender the widget! Calling refresh() usually does not have any effect (unless you've reimplemented refresh() to attach to it an effect).

Reimplemented from Wt::WWebWidget.

void Wt::WText::render ( WFlags< RenderFlag flags)
overrideprotectedvirtual

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.

Reimplemented from Wt::WWebWidget.

void Wt::WText::setInternalPathEncoding ( bool  enabled)

Enables internal path encoding of anchors in the XHTML text.

Anchors to internal paths are represented differently depending on the session implementation (plain HTML, Ajax or HTML5 history). By enabling this option, anchors which reference an internal path (by referring a URL of the form href="#/..."), are re-encoded to link to the internal path.

When using Wt::TextFormat::XHTML (or Wt::TextFormat::UnsafeXHTML) formatted text, the text is pasted verbatim in the browser (with the exception of XSS filtering if applicable). With this option, however, the XHTML text may be transformed at the cost of an additional XML parsing step.

The default value is false.

See also
WAnchor::setInternalPath()
void Wt::WText::setPadding ( const WLength padding,
WFlags< Side sides = Side::Left | Side::Right 
)

Sets padding inside the widget.

Setting padding has the effect of adding distance between the widget children and the border, for a WText padding is only supported on the left and/or right.

bool Wt::WText::setText ( const WString text)

Sets the text.

When the current format is Wt::TextFormat::XHTML, and text is literal (not created using WString::tr()), it is parsed using an XML parser which discards malicious tags and attributes silently. When the parser encounters an XML parse error, the textFormat is changed to Wt::TextFormat::Plain.

Returns whether the text could be set using the current textFormat. A return value of false indicates that the textFormat was changed in order to be able to accept the new text.

See also
text(), setText()
void Wt::WText::setTextAlignment ( AlignmentFlag  textAlignment)

Specifies how text is aligned.

Only the horizontal alignment can be specified. Note that there is no way to specify vertical alignment. You can put the text in a layout with vertical alignment options though, or (misuse) the line-height CSS property for single line texts.

bool Wt::WText::setTextFormat ( TextFormat  format)

Sets the text format.

The textFormat controls how the string should be interpreted: either as plain text, which is displayed literally, or as XHTML-markup.

When changing the textFormat to Wt::TextFormat::XHTML, and the current text is literal (not created using WString::tr()), the current text is parsed using an XML parser which discards malicious tags and attributes silently. When the parser encounters an XML parse error, the textFormat is left unchanged, and this method returns false.

Returns whether the textFormat could be set for the current text.

The default format is Wt::TextFormat::XHTML.

void Wt::WText::setWordWrap ( bool  wordWrap)

Configures word wrapping.

When wordWrap is true, the widget may break lines, creating a multi-line text. When wordWrap is false, the text will displayed on a single line, unless the text contains end-of-lines (for Wt::TextFormat::Plain) or <br /> tags or other block-level tags (for Wt::TextFormat::XHTML).

The default value is true.

See also
wordWrap()
const WString& Wt::WText::text ( ) const

Returns the text.

When a literal XHTMLFormatted text was set, this may differ from the text that was set since malicious tags/attributes may have been stripped.

See also
setText(const WString&)
AlignmentFlag Wt::WText::textAlignment ( ) const

Returns the alignment of children.

See also
setTextAlignment()
TextFormat Wt::WText::textFormat ( ) const

Returns the text format.

See also
setTextFormat()
bool Wt::WText::wordWrap ( ) const

Returns whether the widget may break lines.

See also
setWordWrap(bool)

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