HistoryProxySource Class Reference

#include <HistoryProxySource.h>

Inheritance diagram for HistoryProxySource:

Public Types
enum	FillMode { DoNotFill, FillFromStart, FillFromEnd }

Properties
FillMode	fillMode
int	interval
int	item
int	maximumHistory
ChartDataSource	source
Properties inherited from QObject
	objectName

Public Member Functions
	HistoryProxySource (QObject *parent=nullptr)
Q_INVOKABLE void	clear ()
FillMode	fillMode () const
Q_SIGNAL void	fillModeChanged ()
QVariant	first () const override
int	interval () const
Q_SIGNAL void	intervalChanged ()
QVariant	item (int index) const override
int	item () const
Q_SIGNAL void	itemChanged ()
int	itemCount () const override
QVariant	maximum () const override
int	maximumHistory () const
Q_SIGNAL void	maximumHistoryChanged ()
QVariant	minimum () const override
void	setFillMode (FillMode newFillMode)
void	setInterval (int newInterval)
void	setItem (int newItem)
void	setMaximumHistory (int maximumHistory)
void	setSource (ChartDataSource *newSource)
ChartDataSource *	source () const
Q_SIGNAL void	sourceChanged ()
Public Member Functions inherited from ChartDataSource
	ChartDataSource (QObject *parent=nullptr)
Q_SIGNAL void	dataChanged ()
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 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
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 (QObject *object)
T	qobject_cast (const 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

Additional Inherited Members
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 *receiver, PointerToMemberFunction method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)
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, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method)
bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
QString	tr (const char *sourceText, const char *disambiguation, int n)
QString	trUtf8 (const char *sourceText, const char *disambiguation, int n)
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

A data source that provides a history of a single item of a different data source.

This data source will monitor a single item of another data source for changes and record them, exposing historical values as

Definition at line 24 of file HistoryProxySource.h.

Member Enumeration Documentation

enum HistoryProxySource::FillMode

The different fill modes.

These determine the value returned by itemCount and what happens when requesting an item that does not have a value in the history.

Enumerator
DoNotFill	Do not fill with any items. The source's itemCount will be equal to the number of items in the history.
FillFromStart	Fill with empty values, starting at 0. The source's itemCount will be equal to maximumHistory. Items that do not have a value in the history will return a default-constructed value based on the first item of the source.
FillFromEnd	Fill with empty values, placing partial history at the end. This means that the first recorded history item will be shown at position maximumHistory - 1, the second at maximumHistory - 2 and so on, until maximumHistory is reached, after which items will be discarded normally.

Definition at line 84 of file HistoryProxySource.h.

Property Documentation

HistoryProxySource::FillMode HistoryProxySource::fillMode

readwrite

The fill mode.

This determines what happens when there is not enough history yet. See FillMode for which modes are available.

The default is DoNotFill.

Note

Changing this property will clear the existing history.

Definition at line 75 of file HistoryProxySource.h.

int HistoryProxySource::interval

readwrite

The interval, in milliseconds, with which to query the data source.

If set to a value <= 0, a new item will be added whenever source changes. Otherwise, source will be sampled every interval milliseconds and a new item will be added with whatever value it has at that point, even if it did not change.

The default is 0.

Definition at line 64 of file HistoryProxySource.h.

int HistoryProxySource::item

readwrite

The item of the data source to read data from.

This item will be read either when the source's dataChanged has been emitted or on an interval if interval has been set.

The default is 0.

Note

Changing this property will clear the existing history.

Definition at line 47 of file HistoryProxySource.h.

int HistoryProxySource::maximumHistory

readwrite

The maximum amount of history to keep.

The default is 10.

Definition at line 53 of file HistoryProxySource.h.

ChartDataSource * HistoryProxySource::source

readwrite

The data source to read data from.

This will use the item at item from the provided source and use that to fill the history of this source.

Note

Changing this property will clear the existing history.

Definition at line 36 of file HistoryProxySource.h.

Member Function Documentation

void HistoryProxySource::clear

(

)

Clear the entire history of this source.

Definition at line 210 of file HistoryProxySource.cpp.

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

• HistoryProxySource.h
• HistoryProxySource.cpp