SFML - Simple and Fast Multimedia Library

SMFL 2.3.2

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sf
Window

Window that serves as a target for OpenGL rendering. More...

#include <Window.hpp>

Inheritance diagram for sf::Window:

Public Member Functions
	Window ()
	Default constructor. More...

	Window (VideoMode mode, const String &title, Uint32 style=Style::Default, const ContextSettings &settings=ContextSettings())
	Construct a new window. More...

	Window (WindowHandle handle, const ContextSettings &settings=ContextSettings())
	Construct the window from an existing control. More...

virtual	~Window ()
	Destructor. More...

void	create (VideoMode mode, const String &title, Uint32 style=Style::Default, const ContextSettings &settings=ContextSettings())
	Create (or recreate) the window. More...

void	create (WindowHandle handle, const ContextSettings &settings=ContextSettings())
	Create (or recreate) the window from an existing control. More...

void	close ()
	Close the window and destroy all the attached resources. More...

bool	isOpen () const
	Tell whether or not the window is open. More...

const ContextSettings &	getSettings () const
	Get the settings of the OpenGL context of the window. More...

bool	pollEvent (Event &event)
	Pop the event on top of the event queue, if any, and return it. More...

bool	waitEvent (Event &event)
	Wait for an event and return it. More...

Vector2i	getPosition () const
	Get the position of the window. More...

void	setPosition (const Vector2i &position)
	Change the position of the window on screen. More...

Vector2u	getSize () const
	Get the size of the rendering region of the window. More...

void	setSize (const Vector2u &size)
	Change the size of the rendering region of the window. More...

void	setTitle (const String &title)
	Change the title of the window. More...

void	setIcon (unsigned int width, unsigned int height, const Uint8 *pixels)
	Change the window's icon. More...

void	setVisible (bool visible)
	Show or hide the window. More...

void	setVerticalSyncEnabled (bool enabled)
	Enable or disable vertical synchronization. More...

void	setMouseCursorVisible (bool visible)
	Show or hide the mouse cursor. More...

void	setKeyRepeatEnabled (bool enabled)
	Enable or disable automatic key-repeat. More...

void	setFramerateLimit (unsigned int limit)
	Limit the framerate to a maximum fixed frequency. More...

void	setJoystickThreshold (float threshold)
	Change the joystick threshold. More...

bool	setActive (bool active=true) const
	Activate or deactivate the window as the current target for OpenGL rendering. More...

void	requestFocus ()
	Request the current window to be made the active foreground window. More...

bool	hasFocus () const
	Check whether the window has the input focus. More...

void	display ()
	Display on screen what has been rendered to the window so far. More...

WindowHandle	getSystemHandle () const
	Get the OS-specific handle of the window. More...

Protected Member Functions
virtual void	onCreate ()
	Function called after the window has been created. More...

virtual void	onResize ()
	Function called after the window has been resized. More...

Static Private Member Functions
static void	ensureGlContext ()
	Make sure that a valid OpenGL context exists in the current thread. More...

Detailed Description

Window that serves as a target for OpenGL rendering.

sf::Window is the main class of the Window module.

It defines an OS window that is able to receive an OpenGL rendering.

A sf::Window can create its own new window, or be embedded into an already existing control using the create(handle) function. This can be useful for embedding an OpenGL rendering area into a view which is part of a bigger GUI with existing windows, controls, etc. It can also serve as embedding an OpenGL rendering area into a window created by another (probably richer) GUI library like Qt or wxWidgets.

The sf::Window class provides a simple interface for manipulating the window: move, resize, show/hide, control mouse cursor, etc. It also provides event handling through its pollEvent() and waitEvent() functions.

Note that OpenGL experts can pass their own parameters (antialiasing level, bits for the depth and stencil buffers, etc.) to the OpenGL context attached to the window, with the sf::ContextSettings structure which is passed as an optional argument when creating the window.

Usage example:

// Declare and create a new window
sf::Window window(sf::VideoMode(800, 600), "SFML window");
// Limit the framerate to 60 frames per second (this step is optional)
window.setFramerateLimit(60);
// The main loop - ends as soon as the window is closed
while (window.isOpen())
{
 // Event processing
 sf::Event event;
 while (window.pollEvent(event))
   {
 // Request for closing the window
 if (event.type == sf::Event::Closed)
           window.close();
   }
 // Activate the window for OpenGL rendering
   window.setActive();
 // OpenGL drawing commands go here...
 // End the current frame and display its contents on screen
   window.display();
}

Definition at line 57 of file Window/Window.hpp.

Constructor & Destructor Documentation

sf::Window::Window ( )

Default constructor.

This constructor doesn't actually create the window, use the other constructors or call create() to do so.

sf::Window::Window	(	VideoMode	mode,
		const String &	title,
		Uint32	style = `Style::Default`,
		const ContextSettings &	settings = `ContextSettings()`
	)

Construct a new window.

This constructor creates the window with the size and pixel depth defined in mode. An optional style can be passed to customize the look and behavior of the window (borders, title bar, resizable, closable, ...). If style contains Style::Fullscreen, then mode must be a valid video mode.

The fourth parameter is an optional structure specifying advanced OpenGL context settings such as antialiasing, depth-buffer bits, etc.

Parameters

mode	Video mode to use (defines the width, height and depth of the rendering area of the window)
title	Title of the window
style	Window style, a bitwise OR combination of sf::Style enumerators
settings	Additional settings for the underlying OpenGL context

sf::Window::Window	(	WindowHandle	handle,
		const ContextSettings &	settings = `ContextSettings()`
	)

explicit

Construct the window from an existing control.

Use this constructor if you want to create an OpenGL rendering area into an already existing control.

The second parameter is an optional structure specifying advanced OpenGL context settings such as antialiasing, depth-buffer bits, etc.

Parameters

handle	Platform-specific handle of the control (HWND on Windows, Window on Linux/FreeBSD, NSWindow on OS X)
settings	Additional settings for the underlying OpenGL context

virtual sf::Window::~Window ( )

virtual

Destructor.

Closes the window and frees all the resources attached to it.

Member Function Documentation

void sf::Window::close ( )

Close the window and destroy all the attached resources.

After calling this function, the sf::Window instance remains valid and you can call create() to recreate the window. All other functions such as pollEvent() or display() will still work (i.e. you don't have to test isOpen() every time), and will have no effect on closed windows.

void sf::Window::create	(	VideoMode	mode,
		const String &	title,
		Uint32	style = `Style::Default`,
		const ContextSettings &	settings = `ContextSettings()`
	)

Create (or recreate) the window.

If the window was already created, it closes it first. If style contains Style::Fullscreen, then mode must be a valid video mode.

The fourth parameter is an optional structure specifying advanced OpenGL context settings such as antialiasing, depth-buffer bits, etc.

Parameters

mode	Video mode to use (defines the width, height and depth of the rendering area of the window)
title	Title of the window
style	Window style, a bitwise OR combination of sf::Style enumerators
settings	Additional settings for the underlying OpenGL context

void sf::Window::create	(	WindowHandle	handle,
		const ContextSettings &	settings = `ContextSettings()`
	)

Create (or recreate) the window from an existing control.

Use this function if you want to create an OpenGL rendering area into an already existing control. If the window was already created, it closes it first.

The second parameter is an optional structure specifying advanced OpenGL context settings such as antialiasing, depth-buffer bits, etc.

Parameters

handle	Platform-specific handle of the control (HWND on Windows, Window on Linux/FreeBSD, NSWindow on OS X)
settings	Additional settings for the underlying OpenGL context

void sf::Window::display ( )

Display on screen what has been rendered to the window so far.

This function is typically called after all OpenGL rendering has been done for the current frame, in order to show it on screen.

Vector2i sf::Window::getPosition ( ) const

Get the position of the window.

Returns: Position of the window, in pixels

See also: setPosition

const ContextSettings& sf::Window::getSettings ( ) const

Get the settings of the OpenGL context of the window.

Note that these settings may be different from what was passed to the constructor or the create() function, if one or more settings were not supported. In this case, SFML chose the closest match.

Returns: Structure containing the OpenGL context settings

Vector2u sf::Window::getSize ( ) const

Get the size of the rendering region of the window.

The size doesn't include the titlebar and borders of the window.

Returns: Size in pixels

See also: setSize

WindowHandle sf::Window::getSystemHandle ( ) const

Get the OS-specific handle of the window.

The type of the returned handle is sf::WindowHandle, which is a typedef to the handle type defined by the OS. You shouldn't need to use this function, unless you have very specific stuff to implement that SFML doesn't support, or implement a temporary workaround until a bug is fixed. The type is HWND on Windows, Window on Linux/FreeBSD and NSWindow on OS X.

Returns: System handle of the window

bool sf::Window::hasFocus ( ) const

Check whether the window has the input focus.

At any given time, only one window may have the input focus to receive input events such as keystrokes or most mouse events.

Returns: True if window has focus, false otherwise

See also: requestFocus

bool sf::Window::isOpen ( ) const

Tell whether or not the window is open.

This function returns whether or not the window exists. Note that a hidden window (setVisible(false)) is open (therefore this function would return true).

Returns: True if the window is open, false if it has been closed

virtual void sf::Window::onCreate ( )

protectedvirtual

Function called after the window has been created.

This function is called so that derived classes can perform their own specific initialization as soon as the window is created.

Reimplemented in sf::RenderWindow.

virtual void sf::Window::onResize ( )

protectedvirtual

Function called after the window has been resized.

This function is called so that derived classes can perform custom actions when the size of the window changes.

Reimplemented in sf::RenderWindow.

bool sf::Window::pollEvent ( Event & event )

Pop the event on top of the event queue, if any, and return it.

This function is not blocking: if there's no pending event then it will return false and leave event unmodified. Note that more than one event may be present in the event queue, thus you should always call this function in a loop to make sure that you process every pending event.

sf::Event event;
while (window.pollEvent(event))
{
 // process event...
}

Parameters

event Event to be returned

Returns: True if an event was returned, or false if the event queue was empty

See also: waitEvent

void sf::Window::requestFocus ( )

Request the current window to be made the active foreground window.

At any given time, only one window may have the input focus to receive input events such as keystrokes or mouse events. If a window requests focus, it only hints to the operating system, that it would like to be focused. The operating system is free to deny the request. This is not to be confused with setActive().

See also: hasFocus

bool sf::Window::setActive ( bool active = true ) const

Activate or deactivate the window as the current target for OpenGL rendering.

A window is active only on the current thread, if you want to make it active on another thread you have to deactivate it on the previous thread first if it was active. Only one window can be active on a thread at a time, thus the window previously active (if any) automatically gets deactivated. This is not to be confused with requestFocus().

Parameters

active True to activate, false to deactivate

Returns: True if operation was successful, false otherwise

void sf::Window::setFramerateLimit ( unsigned int limit )

Limit the framerate to a maximum fixed frequency.

If a limit is set, the window will use a small delay after each call to display() to ensure that the current frame lasted long enough to match the framerate limit. SFML will try to match the given limit as much as it can, but since it internally uses sf::sleep, whose precision depends on the underlying OS, the results may be a little unprecise as well (for example, you can get 65 FPS when requesting 60).

Parameters

limit Framerate limit, in frames per seconds (use 0 to disable limit)

void sf::Window::setIcon	(	unsigned int	width,
		unsigned int	height,
		const Uint8 *	pixels
	)

Change the window's icon.

pixels must be an array of width x height pixels in 32-bits RGBA format.

The OS default icon is used by default.

Parameters

width	Icon's width, in pixels
height	Icon's height, in pixels
pixels	Pointer to the array of pixels in memory. The pixels are copied, so you need not keep the source alive after calling this function.

See also: setTitle

void sf::Window::setJoystickThreshold ( float threshold )

Change the joystick threshold.

The joystick threshold is the value below which no JoystickMoved event will be generated.

The threshold value is 0.1 by default.

Parameters

threshold New threshold, in the range [0, 100]

void sf::Window::setKeyRepeatEnabled ( bool enabled )

Enable or disable automatic key-repeat.

If key repeat is enabled, you will receive repeated KeyPressed events while keeping a key pressed. If it is disabled, you will only get a single event when the key is pressed.

Key repeat is enabled by default.

Parameters

enabled True to enable, false to disable

void sf::Window::setMouseCursorVisible ( bool visible )

Show or hide the mouse cursor.

The mouse cursor is visible by default.

Parameters

visible True to show the mouse cursor, false to hide it

void sf::Window::setPosition ( const Vector2i & position )

Change the position of the window on screen.

This function only works for top-level windows (i.e. it will be ignored for windows created from the handle of a child window/control).

Parameters

position New position, in pixels

See also: getPosition

void sf::Window::setSize ( const Vector2u & size )

Change the size of the rendering region of the window.

Parameters

size	New size, in pixels

See also: getSize

void sf::Window::setTitle ( const String & title )

Change the title of the window.

Parameters

title New title

See also: setIcon

void sf::Window::setVerticalSyncEnabled ( bool enabled )

Enable or disable vertical synchronization.

Activating vertical synchronization will limit the number of frames displayed to the refresh rate of the monitor. This can avoid some visual artifacts, and limit the framerate to a good value (but not constant across different computers).

Vertical synchronization is disabled by default.

Parameters

enabled True to enable v-sync, false to deactivate it

void sf::Window::setVisible ( bool visible )

Show or hide the window.

The window is shown by default.

Parameters

visible True to show the window, false to hide it

bool sf::Window::waitEvent ( Event & event )

Wait for an event and return it.

This function is blocking: if there's no pending event then it will wait until an event is received. After this function returns (and no error occurred), the event object is always valid and filled properly. This function is typically used when you have a thread that is dedicated to events handling: you want to make this thread sleep as long as no new event is received.

sf::Event event;
if (window.waitEvent(event))
{
 // process event...
}

Parameters

event Event to be returned

Returns: False if any error occurred

See also: pollEvent

The documentation for this class was generated from the following file:

Window/Window.hpp

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SFML - Simple and Fast Multimedia Library

SMFL 2.3.2

Public Member Functions

Protected Member Functions

Static Private Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation