Units Class Reference

#include <units.h>

Inheritance diagram for Units:

Properties
qreal	devicePixelRatio
int	gridUnit
int	humanMoment
QQmlPropertyMap	iconSizeHints
QQmlPropertyMap	iconSizes
int	largeSpacing
int	longDuration
int	mediumSpacing
int	shortDuration
int	smallSpacing
int	veryLongDuration
int	veryShortDuration
Properties inherited from QObject
	objectName

Signals
void	devicePixelRatioChanged ()
void	durationChanged ()
void	gridUnitChanged ()
void	iconSizeHintsChanged ()
void	iconSizesChanged ()
void	spacingChanged ()

Public Member Functions
	Units (QObject *parent=nullptr)
void	updateAnimationSpeed ()
Public Member Functions inherited from QObject
	QObject (QObject *parent)
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 ()
void	dumpObjectInfo () const const
void	dumpObjectTree ()
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 QRegExp &regExp, 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
bool	inherits (const char *className) const const
void	installEventFilter (QObject *filterObj)
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_DISABLE_COPY (Class)
	Q_DISABLE_COPY_MOVE (Class)
	Q_DISABLE_MOVE (Class)
	Q_EMIT Q_EMIT
	Q_ENUM (...)
	Q_ENUM_NS (...)
	Q_ENUMS (...)
	Q_FLAG (...)
	Q_FLAG_NS (...)
	Q_FLAGS (...)
	Q_GADGET Q_GADGET
	Q_INTERFACES (...)
	Q_INVOKABLE Q_INVOKABLE
	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	qFindChild (const QObject *obj, const QString &name)
QList< T >	qFindChildren (const QObject *obj, const QRegExp &regExp)
QList< T >	qFindChildren (const QObject *obj, const QString &name)
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	setParent (QObject *parent)
bool	setProperty (const char *name, const QVariant &value)
bool	signalsBlocked () const const
int	startTimer (int interval, Qt::TimerType timerType)
int	startTimer (std::chrono::milliseconds time, Qt::TimerType timerType)
QThread *	thread () const const

Static Public Member Functions
static Q_INVOKABLE int	roundToIconSize (int size)
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)
QString	trUtf8 (const char *sourceText, const char *disambiguation, int n)

Additional Inherited Members
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

Expose sizes to QML.

Definition at line 38 of file core/units.h.

Property Documentation

devicePixelRatio

qreal Units::devicePixelRatio

read

The ratio between physical and device-independent pixels.

This value does not depend on the \ size of the configured font. If you want to take font sizes into account when scaling elements, use PlasmaCore.Theme.mSize(PlasmaCore.Theme.defaultFont), PlasmaCore.Units.smallSpacing and PlasmaCore.Units.largeSpacing. The devicePixelRatio follows the definition of "device independent pixel" by Microsoft.

Definition at line 115 of file core/units.h.

gridUnit

int Units::gridUnit

read

The fundamental unit of space that should be used for sizes, expressed in pixels.

Given the screen has an accurate DPI settings, it corresponds to the height of the font's boundingRect.

Definition at line 47 of file core/units.h.

humanMoment

int Units::humanMoment

read

Time in milliseconds equivalent to the theoretical human moment, which can be used to determine whether how long to wait until the user should be informed of something, or can be used as the limit for how long something should wait before being automatically initiated.

Some examples:

• When the user types text in a search field, wait no longer than this duration after the user completes typing before starting the search
• When loading data which would commonly arrive rapidly enough to not require interaction, wait this long before showing a spinner

This might seem an arbitrary number, but given the psychological effect that three seconds seems to be what humans consider a moment (and in the case of waiting for something to happen, a moment is that time when you think "this is taking a bit long, isn't it?"), the idea is to postpone for just before such a conceptual moment. The reason for the two seconds, rather than three, is to function as a middle ground: Not long enough that the user would think that something has taken too long, for also not so fast as to happen too soon.

See also https://www.psychologytoday.com/blog/all-about-addiction/201101/tick-tock-tick-hugs-and-life-in-3-second-intervals (the actual paper is hidden behind an academic paywall and consequently not readily available to us, so the source will have to be the blog entry above)

Since

5.81

Definition at line 169 of file core/units.h.

iconSizeHints

QQmlPropertyMap * Units::iconSizeHints

read

units.iconSizeHints provides access to user-configurable icon size hints, to be used where appropriate in the user interface.

Conceptually, an icon size hint is a key that has one of the sizes from @iconSizes property as value.

Currently available hints:

• panel
• desktop

Definition at line 82 of file core/units.h.

iconSizes

QQmlPropertyMap * Units::iconSizes

read

units.iconSizes provides access to platform-dependent icon sizing

The icon sizes provided are normalized for different DPI, so icons will scale depending on the DPI.

Icon sizes from KIconLoader, adjusted to devicePixelRatio:

• small
• smallMedium
• medium
• large
• huge
• enormous
• desktop (DEPRECATED: use iconSizeHints instead)

Definition at line 67 of file core/units.h.

largeSpacing

int Units::largeSpacing

read

This property is functionally identical to gridUnit.

To avoid confusion, it should not be used.

TODO KF6: This should be changed to work like Kirigami::Units::largeSpacing.

Definition at line 107 of file core/units.h.

longDuration

int Units::longDuration

read

units.longDuration should be used for longer, screen-covering animations, for opening and closing of dialogs and other "not too small" animations

Definition at line 121 of file core/units.h.

mediumSpacing

int Units::mediumSpacing

read

This property holds the amount of spacing that should be used between medium UI elements, such as buttons and text fields in a toolbar.

Internally, this size depends on the size of the default font as rendered on the screen, so it takes user-configured font size and DPI into account.

Definition at line 100 of file core/units.h.

shortDuration

int Units::shortDuration

read

units.shortDuration should be used for short animations, such as accentuating a UI event, hover events, etc.

Definition at line 127 of file core/units.h.

smallSpacing

int Units::smallSpacing

read

This property holds the amount of spacing that should be used between smaller UI elements, such as a small icon and a label in a button.

Internally, this size depends on the size of the default font as rendered on the screen, so it takes user-configured font size and DPI into account.

Definition at line 92 of file core/units.h.

veryLongDuration

int Units::veryLongDuration

read

units.veryLongDuration should be used for specialty animations that benefit from being even longer than longDuration.

Definition at line 139 of file core/units.h.

veryShortDuration

int Units::veryShortDuration

read

units.veryShortDuration should be used for elements that should animate near instantly, but should have a hint of smoothness

Definition at line 133 of file core/units.h.

Member Function Documentation

roundToIconSize()

int Units::roundToIconSize ( int  size )

static

Returns

a size rounded to the nearest inferior standard icon size. sizes larger than iconSizes.huge, it will be returned unmodified

Parameters

int	size the size we want to be rounded down

See also

iconSizes

Definition at line 138 of file core/units.cpp.

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

• core/units.h
• core/units.cpp