KWindowSystem Class Reference

#include <kwindowsystem.h>

Inheritance diagram for KWindowSystem:

Public Types
enum class	Platform { Unknown , X11 , Wayland }

Properties
bool	isPlatformWayland
bool	isPlatformX11
bool	showingDesktop
Properties inherited from QObject
	objectName

Signals
void	showingDesktopChanged (bool showing)

Static Public Member Functions
static Q_INVOKABLE void	activateWindow (QWindow *window, long time=0)
static bool	isPlatformWayland ()
static bool	isPlatformX11 ()
static Platform	platform ()
static KWindowSystem *	self ()
static Q_INVOKABLE void	setCurrentXdgActivationToken (const QString &token)
static void	setMainWindow (QWindow *subwindow, const QString &mainwindow)
static void	setMainWindow (QWindow *subwindow, WId mainwindow)
static void	setShowingDesktop (bool showing)
static bool	showingDesktop ()
static void	updateStartupId (QWindow *window)
Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)
bool	disconnect (const QMetaObject::Connection &connection)
bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method)
bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
bool	disconnect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method)
QString	tr (const char *sourceText, const char *disambiguation, int n)

Additional Inherited Members
Public Member Functions inherited from QObject
	QObject (QObject *parent)
QBindable< QString >	bindableObjectName ()
bool	blockSignals (bool block)
const QObjectList &	children () const const
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const const
void	deleteLater ()
void	destroyed (QObject *obj)
bool	disconnect (const char *signal, const QObject *receiver, const char *method) const const
bool	disconnect (const QObject *receiver, const char *method) const const
void	dumpObjectInfo () const const
void	dumpObjectTree () const const
QList< QByteArray >	dynamicPropertyNames () const const
virtual bool	event (QEvent *e)
virtual bool	eventFilter (QObject *watched, QEvent *event)
T	findChild (const QString &name, Qt::FindChildOptions options) const const
QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const
QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const
QList< T >	findChildren (Qt::FindChildOptions options) const const
bool	inherits (const char *className) const const
void	installEventFilter (QObject *filterObj)
bool	isQuickItemType () const const
bool	isWidgetType () const const
bool	isWindowType () const const
void	killTimer (int id)
virtual const QMetaObject *	metaObject () const const
void	moveToThread (QThread *targetThread)
QString	objectName () const const
void	objectNameChanged (const QString &objectName)
QObject *	parent () const const
QVariant	property (const char *name) const const
	Q_CLASSINFO (Name, Value)
	Q_EMIT Q_EMIT
	Q_ENUM (...)
	Q_ENUM_NS (...)
	Q_ENUMS (...)
	Q_FLAG (...)
	Q_FLAG_NS (...)
	Q_FLAGS (...)
	Q_GADGET Q_GADGET
	Q_GADGET_EXPORT (EXPORT_MACRO)
	Q_INTERFACES (...)
	Q_INVOKABLE Q_INVOKABLE
	Q_MOC_INCLUDE Q_MOC_INCLUDE
	Q_NAMESPACE Q_NAMESPACE
	Q_NAMESPACE_EXPORT (EXPORT_MACRO)
	Q_OBJECT Q_OBJECT
	Q_PROPERTY (...)
	Q_REVISION Q_REVISION
	Q_SET_OBJECT_NAME (Object)
	Q_SIGNAL Q_SIGNAL
	Q_SIGNALS Q_SIGNALS
	Q_SLOT Q_SLOT
	Q_SLOTS Q_SLOTS
T	qobject_cast (const QObject *object)
T	qobject_cast (QObject *object)
	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
void	removeEventFilter (QObject *obj)
void	setObjectName (const QString &name)
void	setObjectName (QAnyStringView name)
void	setParent (QObject *parent)
bool	setProperty (const char *name, const QVariant &value)
bool	setProperty (const char *name, QVariant &&value)
bool	signalsBlocked () const const
int	startTimer (int interval, Qt::TimerType timerType)
int	startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType)
QThread *	thread () const const
Public Attributes inherited from QObject
typedef	QObjectList
Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)
virtual void	connectNotify (const QMetaMethod &signal)
virtual void	customEvent (QEvent *event)
virtual void	disconnectNotify (const QMetaMethod &signal)
bool	isSignalConnected (const QMetaMethod &signal) const const
int	receivers (const char *signal) const const
QObject *	sender () const const
int	senderSignalIndex () const const
virtual void	timerEvent (QTimerEvent *event)

Detailed Description

Convenience access to certain properties and features of window systems.

Definition at line 26 of file kwindowsystem.h.

Member Enumeration Documentation

Platform

enum class KWindowSystem::Platform

strong

Enum describing the windowing system platform used by the QGuiApplication.

See also

platform

Since

5.25

Enumerator
Unknown	A platform unknown to the application is used.
X11	The X11 window system.
Wayland	The Wayland window system.

Definition at line 132 of file kwindowsystem.h.

Property Documentation

isPlatformWayland

bool KWindowSystem::isPlatformWayland

read

Definition at line 29 of file kwindowsystem.h.

isPlatformX11

bool KWindowSystem::isPlatformX11

read

Definition at line 30 of file kwindowsystem.h.

showingDesktop

bool KWindowSystem::showingDesktop

readwrite

Whether "show desktop" is currently active.

Definition at line 35 of file kwindowsystem.h.

Member Function Documentation

activateWindow()

void KWindowSystem::activateWindow ( QWindow * window, long time = 0 )

static

Requests that window window is activated.

Applications shouldn't make attempts to explicitly activate their windows, and instead let the user activate them. In the special cases where this may be needed, applications can use activateWindow(). The window manager may consider whether this request wouldn't result in focus stealing, which would be obtrusive, and may refuse the request.

In case of problems, consult KWin's README.md file, or ask on the kwin@.nosp@m.kde..nosp@m.org mailing list.

Parameters

window	the window to make active
time	X server timestamp of the user activity that caused this request

Since

5.89

Definition at line 81 of file kwindowsystem.cpp.

isPlatformWayland()

static bool KWindowSystem::isPlatformWayland ( )

static

Convenience method to check whether the Platform is Wayland.

See also

platform

isPlatformX11

Since

5.25

isPlatformX11()

static bool KWindowSystem::isPlatformX11 ( )

static

Convenience method to check whether the Platform is X11.

See also

platform

isPlatformWayland

Since

5.25

platform()

KWindowSystem::Platform KWindowSystem::platform ( )

static

Returns the Platform used by the QGuiApplication.

The Platform gets resolved the first time the method is invoked and cached for further usages.

Returns

The Platform used by the QGuiApplication.

Since

5.25

Definition at line 150 of file kwindowsystem.cpp.

self()

KWindowSystem * KWindowSystem::self ( )

static

Access to the singleton instance.

Useful mainly for connecting to signals.

Definition at line 71 of file kwindowsystem.cpp.

setCurrentXdgActivationToken()

void KWindowSystem::setCurrentXdgActivationToken ( const QString & token )

static

Sets the token that will be used when activateWindow is called next.

Since

5.83

Definition at line 190 of file kwindowsystem.cpp.

setMainWindow() [1/2]

void KWindowSystem::setMainWindow ( QWindow * subwindow, const QString & mainwindow )

static

Sets the parent window of subwindow to be mainwindow.

This function should be used before a dialog is shown for a window that belongs to another application.

Parameters

window	the sub window
mainwindow	The main window ID or XDG Foreign token

Since

6.0

Definition at line 98 of file kwindowsystem.cpp.

setMainWindow() [2/2]

void KWindowSystem::setMainWindow ( QWindow * subwindow, WId mainwindow )

static

Sets the parent window of subwindow to be mainwindow.

This overrides the parent set the usual way as the QWidget or QWindow parent, but only for the window manager - e.g. stacking order and window grouping will be affected, but features like automatic deletion of children when the parent is deleted are unaffected and normally use the QObject parent.

This function should be used before a dialog is shown for a window that belongs to another application.

On Wayland, use the QString overload to provide an XDG Foreign token.

Definition at line 87 of file kwindowsystem.cpp.

setShowingDesktop()

void KWindowSystem::setShowingDesktop ( bool showing )

static

Sets the state of the "showing desktop" mode of the window manager.

If on, windows are hidden and desktop background is shown and focused.

Parameters

showing

if true, the window manager is put in "showing desktop" mode. If false, the window manager is put out of that mode.

Since

5.7.0

Definition at line 123 of file kwindowsystem.cpp.

showingDesktop()

static bool KWindowSystem::showingDesktop ( )

static

Returns the state of showing the desktop.

showingDesktopChanged

void KWindowSystem::showingDesktopChanged ( bool showing )

signal

The state of showing the desktop has changed.

updateStartupId()

void KWindowSystem::updateStartupId ( QWindow * window )

static

Updates the platform-specific startup id, if any.

This method is to be called when a running application instance is reused for handling the request to start this application. A typical use would be in the handler of the KDBusService activation signal.

For X11, this updates the id for the Startup Notification protocol, taking the id from QX11Info::nextStartupId(), if not empty. For Wayland, this updates the token for the XDG Activation protocol, taking the token from the "XDG_ACTIVATION_TOKEN" environment variable and then unsetting it, if not empty.

Parameters

window

the main window (needed by X11 platform)

Since

5.91

Definition at line 166 of file kwindowsystem.cpp.

---

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

• kwindowsystem.h
• kwindowsystem.cpp