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Internal/Contributor docs for the Qt SDK. <b>Note:</b> These are NOT official API docs; those are found <a href='https://doc.qt.io/'>here</a>.
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QQuickTextMetrics Class Reference

#include <qquicktextmetrics_p.h>

+ Inheritance diagram for QQuickTextMetrics:
+ Collaboration diagram for QQuickTextMetrics:

Signals

void fontChanged ()
 
void textChanged ()
 
void elideChanged ()
 
void elideWidthChanged ()
 
void metricsChanged ()
 
void renderTypeChanged ()
 
- Signals inherited from QObject
void destroyed (QObject *=nullptr)
 This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.
 
void objectNameChanged (const QString &objectName, QPrivateSignal)
 This signal is emitted after the object's name has been changed.
 

Public Member Functions

 QQuickTextMetrics (QObject *parent=nullptr)
 \qmltype TextMetrics \instantiates QQuickTextMetrics \inqmlmodule QtQuick
 
QFont font () const
 \qmlproperty font QtQuick::TextMetrics::font
 
void setFont (const QFont &font)
 
QString text () const
 \qmlproperty string QtQuick::TextMetrics::text
 
void setText (const QString &text)
 
Qt::TextElideMode elide () const
 \qmlproperty enumeration QtQuick::TextMetrics::elide
 
void setElide (Qt::TextElideMode elide)
 
qreal elideWidth () const
 \qmlproperty real QtQuick::TextMetrics::elideWidth
 
void setElideWidth (qreal elideWidth)
 
qreal advanceWidth () const
 \qmlproperty real QtQuick::TextMetrics::advanceWidth
 
QRectF boundingRect () const
 \qmlproperty rect QtQuick::TextMetrics::boundingRect
 
qreal width () const
 \qmlproperty real QtQuick::TextMetrics::width
 
qreal height () const
 \qmlproperty real QtQuick::TextMetrics::height
 
QRectF tightBoundingRect () const
 \qmlproperty rect QtQuick::TextMetrics::tightBoundingRect
 
QString elidedText () const
 \qmlproperty string QtQuick::TextMetrics::elidedText
 
QQuickText::RenderType renderType () const
 \qmlproperty enumeration QtQuick::TextMetrics::renderType
 
void setRenderType (QQuickText::RenderType renderType)
 
- Public Member Functions inherited from QObject
Q_INVOKABLE QObject (QObject *parent=nullptr)
 Constructs an object with parent object parent.
 
virtual ~QObject ()
 Destroys the object, deleting all its child objects.
 
virtual bool event (QEvent *event)
 This virtual function receives events to an object and should return true if the event e was recognized and processed.
 
virtual bool eventFilter (QObject *watched, QEvent *event)
 Filters events if this object has been installed as an event filter for the watched object.
 
QString objectName () const
 
Q_WEAK_OVERLOAD void setObjectName (const QString &name)
 Sets the object's name to name.
 
void setObjectName (QAnyStringView name)
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
QBindable< QStringbindableObjectName ()
 
bool isWidgetType () const
 Returns true if the object is a widget; otherwise returns false.
 
bool isWindowType () const
 Returns true if the object is a window; otherwise returns false.
 
bool isQuickItemType () const
 Returns true if the object is a QQuickItem; otherwise returns false.
 
bool signalsBlocked () const noexcept
 Returns true if signals are blocked; otherwise returns false.
 
bool blockSignals (bool b) noexcept
 If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).
 
QThreadthread () const
 Returns the thread in which the object lives.
 
bool moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
 Changes the thread affinity for this object and its children and returns true on success.
 
int startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
 This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.
 
int startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)
 
void killTimer (int id)
 Kills the timer with timer identifier, id.
 
void killTimer (Qt::TimerId id)
 
template<typename T >
findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.
 
template<typename T >
QList< T > findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects.
 
template<typename T >
findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
template<typename T >
QList< T > findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
const QObjectListchildren () const
 Returns a list of child objects.
 
void setParent (QObject *parent)
 Makes the object a child of parent.
 
void installEventFilter (QObject *filterObj)
 Installs an event filter filterObj on this object.
 
void removeEventFilter (QObject *obj)
 Removes an event filter object obj from this object.
 
QMetaObject::Connection connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
 
bool disconnect (const char *signal=nullptr, const QObject *receiver=nullptr, const char *member=nullptr) const
 
bool disconnect (const QObject *receiver, const char *member=nullptr) const
 
void dumpObjectTree () const
 Dumps a tree of children to the debug output.
 
void dumpObjectInfo () const
 Dumps information about signal connections, etc.
 
bool setProperty (const char *name, const QVariant &value)
 Sets the value of the object's name property to value.
 
bool setProperty (const char *name, QVariant &&value)
 
QVariant property (const char *name) const
 Returns the value of the object's name property.
 
QList< QByteArraydynamicPropertyNames () const
 
QBindingStoragebindingStorage ()
 
const QBindingStoragebindingStorage () const
 
QObjectparent () const
 Returns a pointer to the parent object.
 
bool inherits (const char *classname) const
 Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false.
 

Properties

QFont font
 
QString text
 
qreal advanceWidth
 
QRectF boundingRect
 
qreal width
 
qreal height
 
QRectF tightBoundingRect
 
QString elidedText
 
Qt::TextElideMode elide
 
qreal elideWidth
 
QQuickText::RenderType renderType
 
- Properties inherited from QObject
QString objectName
 the name of this object
 

Additional Inherited Members

- Public Slots inherited from QObject
void deleteLater ()
 \threadsafe
 
- Static Public Member Functions inherited from QObject
static QMetaObject::Connection connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
 \threadsafe
 
static QMetaObject::Connection connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType *context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)
 
static bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
 \threadsafe
 
static bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
 
static bool disconnect (const QMetaObject::Connection &)
 Disconnect a connection.
 
template<typename Func1 , typename Func2 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiver, Func2 slot)
 
template<typename Func1 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const QObject *receiver, void **zero)
 
- Protected Member Functions inherited from QObject
QObjectsender () const
 Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.
 
int senderSignalIndex () const
 
int receivers (const char *signal) const
 Returns the number of receivers connected to the signal.
 
bool isSignalConnected (const QMetaMethod &signal) const
 
virtual void timerEvent (QTimerEvent *event)
 This event handler can be reimplemented in a subclass to receive timer events for the object.
 
virtual void childEvent (QChildEvent *event)
 This event handler can be reimplemented in a subclass to receive child events.
 
virtual void customEvent (QEvent *event)
 This event handler can be reimplemented in a subclass to receive custom events.
 
virtual void connectNotify (const QMetaMethod &signal)
 
virtual void disconnectNotify (const QMetaMethod &signal)
 
 QObject (QObjectPrivate &dd, QObject *parent=nullptr)
 
- Protected Attributes inherited from QObject
QScopedPointer< QObjectDatad_ptr
 

Detailed Description

Definition at line 31 of file qquicktextmetrics_p.h.

Constructor & Destructor Documentation

◆ QQuickTextMetrics()

QT_BEGIN_NAMESPACE QQuickTextMetrics::QQuickTextMetrics ( QObject * parent = nullptr)
explicit

\qmltype TextMetrics \instantiates QQuickTextMetrics \inqmlmodule QtQuick

Since
5.4

Provides metrics for a given font and text.

TextMetrics calculates various properties of a given string of text for a particular font.

It provides a declarative API for the functions in \l QFontMetricsF which take arguments.

TextMetrics {
id: textMetrics
font.family: "Arial"
elide: Text.ElideMiddle
text: "Hello World"
}
MyItem {
text: textMetrics.elidedText
}
QString family() const
Returns the requested font family name.
Definition qfont.cpp:817
Qt::TextElideMode elide
GLenum GLuint id
[7]
See also
QFontMetricsF, FontMetrics

Definition at line 41 of file qquicktextmetrics.cpp.

Member Function Documentation

◆ advanceWidth()

qreal QQuickTextMetrics::advanceWidth ( ) const

\qmlproperty real QtQuick::TextMetrics::advanceWidth

This property holds the advance in pixels of the characters in \l text. This is the distance from the position of the string to where the next string should be drawn.

See also
{QFontMetricsF::horizontalAdvance()}

Definition at line 147 of file qquicktextmetrics.cpp.

References QFontMetricsF::horizontalAdvance(), QQuickText::QtRendering, and QTextOption::setUseDesignMetrics().

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◆ boundingRect()

QRectF QQuickTextMetrics::boundingRect ( ) const

\qmlproperty rect QtQuick::TextMetrics::boundingRect

This property holds the bounding rectangle of the characters in the string specified by \l text.

See also
{QFontMetricsF::boundingRect()}, tightBoundingRect

Definition at line 162 of file qquicktextmetrics.cpp.

References QFontMetricsF::boundingRect(), QQuickText::QtRendering, and QTextOption::setUseDesignMetrics().

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◆ elide()

Qt::TextElideMode QQuickTextMetrics::elide ( ) const

\qmlproperty enumeration QtQuick::TextMetrics::elide

This property holds the elide mode of the text. This determines the position in which the string is elided. The possible values are:

\value Qt::ElideNone No eliding; this is the default value. \value Qt::ElideLeft For example: "...World" \value Qt::ElideMiddle For example: "He...ld" \value Qt::ElideRight For example: "Hello..."

See also
elideWidth, QFontMetrics::elidedText

Definition at line 102 of file qquicktextmetrics.cpp.

◆ elideChanged

void QQuickTextMetrics::elideChanged ( )
signal

Referenced by setElide().

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◆ elidedText()

QString QQuickTextMetrics::elidedText ( ) const

\qmlproperty string QtQuick::TextMetrics::elidedText

This property holds an elided version of the string (i.e., a string with "..." in it) if the string \l text is wider than \l elideWidth. If the text is not wider than \l elideWidth, or \l elide is set to Qt::ElideNone, this property will be equal to the original string.

See also
{QFontMetricsF::elidedText()}

Definition at line 228 of file qquicktextmetrics.cpp.

References QFontMetricsF::elidedText().

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◆ elideWidth()

qreal QQuickTextMetrics::elideWidth ( ) const

\qmlproperty real QtQuick::TextMetrics::elideWidth

This property holds the largest width the text can have (in pixels) before eliding will occur.

See also
elide, QFontMetrics::elidedText

Definition at line 124 of file qquicktextmetrics.cpp.

◆ elideWidthChanged

void QQuickTextMetrics::elideWidthChanged ( )
signal

Referenced by setElideWidth().

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◆ font()

QFont QQuickTextMetrics::font ( ) const

\qmlproperty font QtQuick::TextMetrics::font

This property holds the font used for the metrics calculations.

Definition at line 55 of file qquicktextmetrics.cpp.

◆ fontChanged

void QQuickTextMetrics::fontChanged ( )
signal

Referenced by setFont().

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◆ height()

qreal QQuickTextMetrics::height ( ) const

\qmlproperty real QtQuick::TextMetrics::height

This property holds the height of the bounding rectangle of the characters in the string specified by \l text. It is equivalent to:

textMetrics.boundingRect.height
See also
boundingRect

Definition at line 198 of file qquicktextmetrics.cpp.

References boundingRect, and QRectF::height().

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◆ metricsChanged

void QQuickTextMetrics::metricsChanged ( )
signal

Referenced by setElide(), setElideWidth(), setFont(), and setText().

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◆ renderType()

QQuickText::RenderType QQuickTextMetrics::renderType ( ) const

\qmlproperty enumeration QtQuick::TextMetrics::renderType

Override the default rendering type for this component.

Supported render types are:

\value TextEdit.QtRendering Text is rendered using a scalable distance field for each glyph. \value TextEdit.NativeRendering Text is rendered using a platform-specific technique.

This should match the intended renderType where you draw the text.

Since
6.3
See also
{Text::renderType}{Text.renderType}

Definition at line 248 of file qquicktextmetrics.cpp.

◆ renderTypeChanged

void QQuickTextMetrics::renderTypeChanged ( )
signal

Referenced by setRenderType().

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◆ setElide()

void QQuickTextMetrics::setElide ( Qt::TextElideMode elide)

Definition at line 107 of file qquicktextmetrics.cpp.

References elide, elideChanged(), emit, and metricsChanged().

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◆ setElideWidth()

void QQuickTextMetrics::setElideWidth ( qreal elideWidth)

Definition at line 129 of file qquicktextmetrics.cpp.

References elideWidth, elideWidthChanged(), emit, and metricsChanged().

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◆ setFont()

void QQuickTextMetrics::setFont ( const QFont & font)

Definition at line 60 of file qquicktextmetrics.cpp.

References emit, font, fontChanged(), and metricsChanged().

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◆ setRenderType()

void QQuickTextMetrics::setRenderType ( QQuickText::RenderType renderType)

Definition at line 253 of file qquicktextmetrics.cpp.

References emit, renderType, and renderTypeChanged().

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◆ setText()

void QQuickTextMetrics::setText ( const QString & text)

Definition at line 80 of file qquicktextmetrics.cpp.

References emit, metricsChanged(), text, and textChanged().

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◆ text()

QString QQuickTextMetrics::text ( ) const

\qmlproperty string QtQuick::TextMetrics::text

This property holds the text used for the metrics calculations.

Definition at line 75 of file qquicktextmetrics.cpp.

◆ textChanged

void QQuickTextMetrics::textChanged ( )
signal

Referenced by setText().

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◆ tightBoundingRect()

QRectF QQuickTextMetrics::tightBoundingRect ( ) const

\qmlproperty rect QtQuick::TextMetrics::tightBoundingRect

This property holds a tight bounding rectangle around the characters in the string specified by \l text.

See also
{QFontMetricsF::tightBoundingRect()}, boundingRect

Definition at line 211 of file qquicktextmetrics.cpp.

References QQuickText::QtRendering, QTextOption::setUseDesignMetrics(), and QFontMetricsF::tightBoundingRect().

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◆ width()

qreal QQuickTextMetrics::width ( ) const

\qmlproperty real QtQuick::TextMetrics::width

This property holds the width of the bounding rectangle of the characters in the string specified by \l text. It is equivalent to:

textMetrics.boundingRect.width
See also
boundingRect

Definition at line 181 of file qquicktextmetrics.cpp.

References boundingRect, and QRectF::width().

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Property Documentation

◆ advanceWidth

qreal QQuickTextMetrics::advanceWidth
read

Definition at line 37 of file qquicktextmetrics_p.h.

◆ boundingRect

QRectF QQuickTextMetrics::boundingRect
read

Definition at line 38 of file qquicktextmetrics_p.h.

Referenced by height(), and width().

◆ elide

Qt::TextElideMode QQuickTextMetrics::elide
readwrite

Definition at line 43 of file qquicktextmetrics_p.h.

Referenced by setElide().

◆ elidedText

QString QQuickTextMetrics::elidedText
read

Definition at line 42 of file qquicktextmetrics_p.h.

◆ elideWidth

qreal QQuickTextMetrics::elideWidth
readwrite

Definition at line 44 of file qquicktextmetrics_p.h.

Referenced by setElideWidth().

◆ font

QFont QQuickTextMetrics::font
readwrite

Definition at line 35 of file qquicktextmetrics_p.h.

Referenced by setFont().

◆ height

qreal QQuickTextMetrics::height
read

Definition at line 40 of file qquicktextmetrics_p.h.

◆ renderType

QQuickText::RenderType QQuickTextMetrics::renderType
readwrite

Definition at line 45 of file qquicktextmetrics_p.h.

Referenced by setRenderType().

◆ text

QString QQuickTextMetrics::text
readwrite

Definition at line 36 of file qquicktextmetrics_p.h.

Referenced by setText().

◆ tightBoundingRect

QRectF QQuickTextMetrics::tightBoundingRect
read

Definition at line 41 of file qquicktextmetrics_p.h.

◆ width

qreal QQuickTextMetrics::width
read

Definition at line 39 of file qquicktextmetrics_p.h.


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