Wt::WHBoxLayout Class Reference

A layout manager which arranges widgets horizontally. More...

#include <Wt/WHBoxLayout.h>

Inheritance diagram for Wt::WHBoxLayout:

Public Member Functions
	WHBoxLayout ()
	Creates a new horizontal box layout.
Public Member Functions inherited from Wt::WBoxLayout
	WBoxLayout (LayoutDirection dir)
	Creates a new box layout. More...
virtual void	addItem (std::unique_ptr< WLayoutItem > item) override
	Adds a layout item. More...
virtual std::unique_ptr< WLayoutItem >	removeItem (WLayoutItem *item) override
	Removes a layout item (widget or nested layout). More...
virtual WLayoutItem *	itemAt (int index) const override
	Returns the layout item at a specific index. More...
virtual int	count () const override
	Returns the number of items in this layout. More...
void	setDirection (LayoutDirection direction)
	Sets the layout direction. More...
LayoutDirection	direction () const
	Returns the layout direction. More...
void	setSpacing (int size)
	Sets spacing between each item. More...
int	spacing () const
	Returns the spacing between each item. More...
void	addWidget (std::unique_ptr< WWidget > widget, int stretch, WFlags< AlignmentFlag > alignment)
	Adds a widget to the layout. More...
template<typename Widget >
Widget *	addWidget (std::unique_ptr< Widget > widget, int stretch=0, WFlags< AlignmentFlag > alignment=None)
	Adds a widget to the layout, returning a raw pointer. More...
void	addLayout (std::unique_ptr< WLayout > layout, int stretch, WFlags< AlignmentFlag > alignment)
	Adds a nested layout to the layout. More...
template<typename Layout >
Layout *	addLayout (std::unique_ptr< Layout > layout, int stretch=0, WFlags< AlignmentFlag > alignment=None)
void	addSpacing (const WLength &size)
	Adds extra spacing. More...
void	addStretch (int stretch=0)
	Adds a stretch element. More...
void	insertWidget (int index, std::unique_ptr< WWidget > widget, int stretch=0, WFlags< AlignmentFlag > alignment=None)
	Inserts a widget in the layout. More...
template<typename Widget >
Widget *	insertWidget (int index, std::unique_ptr< Widget > widget, int stretch=0, WFlags< AlignmentFlag > alignment=None)
	Inserts a widget in the layout, returning a raw pointer. More...
void	insertLayout (int index, std::unique_ptr< WLayout > layout, int stretch=0, WFlags< AlignmentFlag > alignment=None)
	Inserts a nested layout in the layout. More...
template<typename Layout >
Layout *	insertLayout (int index, std::unique_ptr< Layout > layout, int stretch=0, WFlags< AlignmentFlag > alignment=None)
void	insertSpacing (int index, const WLength &size)
	Inserts extra spacing in the layout. More...
void	insertStretch (int index, int stretch=0)
	Inserts a stretch element in the layout. More...
bool	setStretchFactor (WLayout *layout, int stretch)
	Sets the stretch factor for a nested layout. More...
bool	setStretchFactor (WWidget *widget, int stretch)
	Sets the stretch factor for a widget. More...
void	setResizable (int index, bool enabled=true, const WLength &initialSize=WLength::Auto)
	Sets whether the use may drag a particular border. More...
bool	isResizable (int index) const
	Returns whether the user may drag a particular border. More...
Public Member Functions inherited from Wt::WLayout
virtual	~WLayout ()
	Destructor. More...
void	setPreferredImplementation (LayoutImplementation implementation)
	Set the preferred layout implementation. More...
void	addWidget (std::unique_ptr< WWidget > widget)
	Adds the given widget to the layout. More...
std::unique_ptr< WWidget >	removeWidget (WWidget *widget)
	Removes the given widget from the layout. More...
virtual int	indexOf (WLayoutItem *item) const
	Returns the index of a given item. More...
virtual WWidgetItem *	findWidgetItem (WWidget *widget) override
	Finds the widget item associated with the given widget.
virtual WWidget *	widget () override
	Returns the widget that is held by this WLayoutItem. More...
virtual WLayout *	layout () override
	Returns the layout that implements this WLayoutItem. More...
virtual WLayout *	parentLayout () const override
	Returns the layout in which this item is contained.
void	setContentsMargins (int left, int top, int right, int bottom)
	Set contents margins (in pixels). More...
void	getContentsMargins (int *left, int *top, int *right, int *bottom) const
	Returns the contents margins. More...
Public Member Functions inherited from Wt::WLayoutItem
virtual	~WLayoutItem ()
	Destructor.
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< WObject >	removeChild (WObject *child)
	Remove a child WObject, so its lifetime is no longer determined by this WObject.
template<typename Child >
std::unique_ptr< Child >	removeChild (Child *child)
	Remove a child WObject, so its lifetime is no longer determined by this WObject. More...
virtual const std::string	id () const
	Returns the (unique) identifier for this object. More...
virtual void	setObjectName (const std::string &name)
	Sets an object name. More...
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...
template<typename... Args, typename C >
auto	bindSafe (void(C::*method)(Args...)) noexcept
	Protects a method call against object destruction. More...
template<typename... Args, typename C >
auto	bindSafe (void(C::*method)(Args...) const) const noexcept
	Protects a const method call against object destruction. More...
template<typename Function >
auto	bindSafe (const Function &function) noexcept
	Protects a function against object destruction. 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::WLayout
static void	setDefaultImplementation (LayoutImplementation implementation)
	Sets the preferred layout implementation globally. More...
Protected Member Functions inherited from Wt::WLayout
	WLayout ()
	Create a layout.
void	update (WLayoutItem *item=nullptr)
	Update the layout. More...
Protected Member Functions inherited from Wt::WObject
virtual WStatelessSlot *	getStateless (Method method)
	On-demand stateless slot implementation. More...

Detailed Description

A layout manager which arranges widgets horizontally.

This convenience class creates a horizontal box layout, laying contained widgets out from left to right.

See the WBoxLayout documentation for available member methods and more information.

Usage example:

Wt::WContainerWidget *w = addWidget(std::make_unique<Wt::WContainerWidget>());
 
auto layout = std::make_unique<Wt::WHBoxLayout>();
layout->addWidget(std::make_unique<Wt::WText>("One"));
layout->addWidget(std::make_unique<Wt::WText>("Two"));
layout->addWidget(std::make_unique<Wt::WText>("Three"));
layout->addWidget(std::make_unique<Wt::WText>("Four"));
 
w->setLayout(std::move(layout));

Note

First consider if you can achieve your layout using CSS !

See also

WVBoxLayout