LineChart Class Reference

#include <LineChart.h>

Inheritance diagram for LineChart:

Properties
ChartDataSource *	fillColorSource
qreal	fillOpacity
bool	interpolate
qreal	lineWidth
QQmlComponent *	pointDelegate
Properties inherited from XYChart
Direction	direction
bool	stacked
RangeGroup *	xRange
RangeGroup *	yRange
Properties inherited from Chart
ChartDataSource *	colorSource
IndexingMode	indexingMode
ChartDataSource *	nameSource
ChartDataSource *	shortNameSource
QQmlListProperty< ChartDataSource >	valueSources
Properties inherited from QQuickItem
	activeFocus
	activeFocusOnTab
	antialiasing
	baselineOffset
	childrenRect
	clip
	containmentMask
	enabled
	focus
	height
	implicitHeight
	implicitWidth
	opacity
	parent
	rotation
	scale
	smooth
	state
	transformOrigin
	visible
	width
	x
	y
	z
Properties inherited from QObject
	objectName

Public Member Functions
	LineChart (QQuickItem *parent=nullptr)
ChartDataSource *	fillColorSource () const
Q_SIGNAL void	fillColorSourceChanged ()
qreal	fillOpacity () const
Q_SIGNAL void	fillOpacityChanged ()
bool	interpolate () const
Q_SIGNAL void	interpolateChanged ()
qreal	lineWidth () const
Q_SIGNAL void	lineWidthChanged ()
QQmlComponent *	pointDelegate () const
Q_SIGNAL void	pointDelegateChanged ()
void	setFillColorSource (ChartDataSource *newFillColorSource)
void	setFillOpacity (qreal opacity)
void	setInterpolate (bool newInterpolate)
void	setLineWidth (qreal width)
void	setPointDelegate (QQmlComponent *newPointDelegate)
Public Member Functions inherited from XYChart
	XYChart (QQuickItem *parent=nullptr)
	~XYChart () override=default
ComputedRange	computedRange () const
Q_SIGNAL void	computedRangeChanged ()
virtual XYChart::Direction	direction () const
Q_SIGNAL void	directionChanged ()
virtual void	setDirection (XYChart::Direction newDirection)
void	setStacked (bool newStacked)
bool	stacked () const
Q_SIGNAL void	stackedChanged ()
virtual RangeGroup *	xRange () const
virtual RangeGroup *	yRange () const
Public Member Functions inherited from Chart
	Chart (QQuickItem *parent=nullptr)
ChartDataSource *	colorSource () const
Q_SIGNAL void	colorSourceChanged ()
Q_SIGNAL void	dataChanged ()
IndexingMode	indexingMode () const
Q_SIGNAL void	indexingModeChanged ()
Q_INVOKABLE void	insertValueSource (int index, ChartDataSource *source)
ChartDataSource *	nameSource () const
Q_SIGNAL void	nameSourceChanged ()
Q_INVOKABLE void	removeValueSource (int index)
Q_INVOKABLE void	removeValueSource (QObject *source)
void	setColorSource (ChartDataSource *colorSource)
void	setIndexingMode (IndexingMode newIndexingMode)
void	setNameSource (ChartDataSource *nameSource)
void	setShortNameSource (ChartDataSource *shortNameSource)
ChartDataSource *	shortNameSource () const
Q_SIGNAL void	shortNameSourceChanged ()
QList< ChartDataSource * >	valueSources () const
Q_SIGNAL void	valueSourcesChanged ()
DataSourcesProperty	valueSourcesProperty ()
Public Member Functions inherited from QQuickItem
	QQuickItem (QQuickItem *parent)
Qt::MouseButtons	acceptedMouseButtons () const const
bool	acceptHoverEvents () const const
bool	acceptTouchEvents () const const
void	activeFocusChanged (bool)
bool	activeFocusOnTab () const const
void	activeFocusOnTabChanged (bool)
bool	antialiasing () const const
void	antialiasingChanged (bool)
qreal	baselineOffset () const const
void	baselineOffsetChanged (qreal)
QBindable< qreal >	bindableHeight ()
QBindable< qreal >	bindableWidth ()
QBindable< qreal >	bindableX ()
QBindable< qreal >	bindableY ()
virtual QRectF	boundingRect () const const
QQuickItem *	childAt (qreal x, qreal y) const const
QList< QQuickItem * >	childItems () const const
QRectF	childrenRect ()
void	childrenRectChanged (const QRectF &)
bool	clip () const const
void	clipChanged (bool)
virtual QRectF	clipRect () const const
QObject *	containmentMask () const const
void	containmentMaskChanged ()
virtual bool	contains (const QPointF &point) const const
QCursor	cursor () const const
void	dumpItemTree () const const
void	enabledChanged ()
void	ensurePolished ()
bool	filtersChildMouseEvents () const const
Flags	flags () const const
void	focusChanged (bool)
void	forceActiveFocus ()
void	forceActiveFocus (Qt::FocusReason reason)
void	grabMouse ()
QSharedPointer< QQuickItemGrabResult >	grabToImage (const QSize &targetSize)
void	grabTouchPoints (const QList< int > &ids)
bool	hasActiveFocus () const const
bool	hasFocus () const const
qreal	height () const const
void	heightChanged ()
qreal	implicitHeight () const const
void	implicitHeightChanged ()
qreal	implicitWidth () const const
void	implicitWidthChanged ()
virtual QVariant	inputMethodQuery (Qt::InputMethodQuery query) const const
bool	isAncestorOf (const QQuickItem *child) const const
bool	isEnabled () const const
bool	isFocusScope () const const
virtual bool	isTextureProvider () const const
bool	isVisible () const const
bool	keepMouseGrab () const const
bool	keepTouchGrab () const const
QPointF	mapFromGlobal (const QPointF &point) const const
QPointF	mapFromItem (const QQuickItem *item, const QPointF &point) const const
QPointF	mapFromScene (const QPointF &point) const const
QRectF	mapRectFromItem (const QQuickItem *item, const QRectF &rect) const const
QRectF	mapRectFromScene (const QRectF &rect) const const
QRectF	mapRectToItem (const QQuickItem *item, const QRectF &rect) const const
QRectF	mapRectToScene (const QRectF &rect) const const
QPointF	mapToGlobal (const QPointF &point) const const
QPointF	mapToItem (const QQuickItem *item, const QPointF &point) const const
QPointF	mapToScene (const QPointF &point) const const
QQuickItem *	nextItemInFocusChain (bool forward)
qreal	opacity () const const
void	opacityChanged ()
void	parentChanged (QQuickItem *)
QQuickItem *	parentItem () const const
void	polish ()
void	resetAntialiasing ()
void	resetHeight ()
void	resetWidth ()
qreal	rotation () const const
void	rotationChanged ()
qreal	scale () const const
void	scaleChanged ()
QQuickItem *	scopedFocusItem () const const
void	setAcceptedMouseButtons (Qt::MouseButtons buttons)
void	setAcceptHoverEvents (bool enabled)
void	setAcceptTouchEvents (bool enabled)
void	setActiveFocusOnTab (bool)
void	setAntialiasing (bool)
void	setBaselineOffset (qreal)
void	setClip (bool)
void	setContainmentMask (QObject *mask)
void	setCursor (const QCursor &cursor)
void	setEnabled (bool)
void	setFiltersChildMouseEvents (bool filter)
void	setFlag (Flag flag, bool enabled)
void	setFlags (Flags flags)
void	setFocus (bool focus, Qt::FocusReason reason)
void	setFocus (bool)
void	setHeight (qreal)
void	setImplicitHeight (qreal)
void	setImplicitWidth (qreal)
void	setKeepMouseGrab (bool keep)
void	setKeepTouchGrab (bool keep)
void	setOpacity (qreal)
void	setParentItem (QQuickItem *parent)
void	setRotation (qreal)
void	setScale (qreal)
void	setSize (const QSizeF &size)
void	setSmooth (bool)
void	setState (const QString &)
void	setTransformOrigin (TransformOrigin)
void	setVisible (bool)
void	setWidth (qreal)
void	setX (qreal)
void	setY (qreal)
void	setZ (qreal)
QSizeF	size () const const
bool	smooth () const const
void	smoothChanged (bool)
void	stackAfter (const QQuickItem *sibling)
void	stackBefore (const QQuickItem *sibling)
QString	state () const const
void	stateChanged (const QString &)
virtual QSGTextureProvider *	textureProvider () const const
TransformOrigin	transformOrigin () const const
void	transformOriginChanged (TransformOrigin)
void	ungrabMouse ()
void	ungrabTouchPoints ()
void	unsetCursor ()
void	update ()
QQuickItem *	viewportItem () const const
void	visibleChanged ()
qreal	width () const const
void	widthChanged ()
QQuickWindow *	window () const const
void	windowChanged (QQuickWindow *window)
qreal	x () const const
void	xChanged ()
qreal	y () const const
void	yChanged ()
qreal	z () const const
void	zChanged ()
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	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

Static Public Member Functions
static LineChartAttached *	qmlAttachedProperties (QObject *object)
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)

Protected Member Functions
void	geometryChange (const QRectF &newGeometry, const QRectF &oldGeometry) override
void	onDataChanged () override
QSGNode *	updatePaintNode (QSGNode *node, QQuickItem::UpdatePaintNodeData *data) override
void	updatePolish () override
Protected Member Functions inherited from XYChart
void	setComputedRange (ComputedRange range)
virtual void	updateComputedRange ()
Protected Member Functions inherited from Chart
void	componentComplete () override
Protected Member Functions inherited from QQuickItem
virtual bool	childMouseEventFilter (QQuickItem *item, QEvent *event)
virtual void	classBegin () override
virtual void	dragEnterEvent (QDragEnterEvent *event)
virtual void	dragLeaveEvent (QDragLeaveEvent *event)
virtual void	dragMoveEvent (QDragMoveEvent *event)
virtual void	dropEvent (QDropEvent *event)
virtual bool	event (QEvent *ev) override
virtual void	focusInEvent (QFocusEvent *)
virtual void	focusOutEvent (QFocusEvent *)
bool	heightValid () const const
virtual void	hoverEnterEvent (QHoverEvent *event)
virtual void	hoverLeaveEvent (QHoverEvent *event)
virtual void	hoverMoveEvent (QHoverEvent *event)
virtual void	inputMethodEvent (QInputMethodEvent *event)
bool	isComponentComplete () const const
virtual void	itemChange (ItemChange change, const ItemChangeData &value)
virtual void	keyPressEvent (QKeyEvent *event)
virtual void	keyReleaseEvent (QKeyEvent *event)
virtual void	mouseDoubleClickEvent (QMouseEvent *event)
virtual void	mouseMoveEvent (QMouseEvent *event)
virtual void	mousePressEvent (QMouseEvent *event)
virtual void	mouseReleaseEvent (QMouseEvent *event)
virtual void	mouseUngrabEvent ()
virtual void	releaseResources ()
virtual void	touchEvent (QTouchEvent *event)
virtual void	touchUngrabEvent ()
void	updateInputMethod (Qt::InputMethodQueries queries)
virtual QSGNode *	updatePaintNode (QSGNode *oldNode, UpdatePaintNodeData *updatePaintNodeData)
virtual void	wheelEvent (QWheelEvent *event)
bool	widthValid () const const
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)

Additional Inherited Members
Public Types inherited from XYChart
enum class	Direction { ZeroAtStart , ZeroAtEnd }
Public Types inherited from Chart
using	DataSourcesProperty = QQmlListProperty<ChartDataSource>
enum	IndexingMode { IndexSourceValues = 1 , IndexEachSource , IndexAllValues }
Public Types inherited from QQuickItem
enum	Flag
enum	ItemChange
enum	TransformOrigin
Public Attributes inherited from QQuickItem
	Bottom
	BottomLeft
	BottomRight
	Center
typedef	Flags
	ItemAcceptsDrops
	ItemAcceptsInputMethod
	ItemActiveFocusHasChanged
	ItemAntialiasingHasChanged
	ItemChildAddedChange
	ItemChildRemovedChange
	ItemClipsChildrenToShape
	ItemDevicePixelRatioHasChanged
	ItemEnabledHasChanged
	ItemHasContents
	ItemIsFocusScope
	ItemIsViewport
	ItemObservesViewport
	ItemOpacityHasChanged
	ItemParentHasChanged
	ItemRotationHasChanged
	ItemSceneChange
	ItemVisibleHasChanged
	Left
	Right
	Top
	TopLeft
	TopRight
Public Attributes inherited from QObject
typedef	QObjectList

Detailed Description

A line chart.

Usage example

import QtQuick
import QtQuick.Controls
 
import org.kde.quickcharts as Charts
 
Charts.LineChart {
    width: 400
    height: 300
 
    valueSources: [
        Charts.ModelSource { roleName: "value1"; model: listModel },
        Charts.ModelSource { roleName: "value2"; model: listModel },
        Charts.ModelSource { roleName: "value3"; model: listModel }
    ]
    colorSource: Charts.ArraySource { array: ["red", "green", "blue"] }
    nameSource: Charts.ArraySource { array: ["Example 1", "Example 2", "Example 3"]}
 
    ListModel {
        id: listModel
 
        ListElement { value1: 19; value2: 2; value3: 6 }
        ListElement { value1: 14; value2: 20; value3: 17 }
        ListElement { value1: 4; value2: 10; value3: 11 }
        ListElement { value1: 5; value2: 11; value3: 9 }
        ListElement { value1: 20; value2: 7; value3: 13 }
    }
}

The resulting line chart.

Definition at line 80 of file LineChart.h.

Property Documentation

fillColorSource

ChartDataSource * LineChart::fillColorSource

readwrite

A data source that supplies color values for the line charts' fill area.

If this is not set (the default), the normal color source will be used, with the fillOpacity used as its opacity.

Definition at line 119 of file LineChart.h.

fillOpacity

qreal LineChart::fillOpacity

readwrite

The opacity of the area below a line.

The default is 0.0. Note that if fillColorSource is set, this value is ignored.

Definition at line 109 of file LineChart.h.

interpolate

bool LineChart::interpolate

readwrite

Interpolate the values in the chart so that the lines become smoothed.

Definition at line 92 of file LineChart.h.

lineWidth

qreal LineChart::lineWidth

readwrite

The width of a line in the chart.

Definition at line 99 of file LineChart.h.

pointDelegate

QQmlComponent * LineChart::pointDelegate

readwrite

A delegate that will be placed at each line chart point.

When this is not null, the specified component will be used to instantiate an object for each point in the chart. These objects will then be placed centered at positions corresponding to the points on the chart. Each instance will have access to the attached properties of LineChartAttached through LineChart attached object.

Note

The component assigned to this property is expected to create a QQuickItem, since the created object needs to be positioned.

Definition at line 135 of file LineChart.h.

Constructor & Destructor Documentation

LineChart()

LineChart::LineChart ( QQuickItem * parent = nullptr )

explicit

Definition at line 106 of file LineChart.cpp.

Member Function Documentation

fillColorSource()

ChartDataSource * LineChart::fillColorSource

(

)

const

Definition at line 159 of file LineChart.cpp.

fillOpacity()

qreal LineChart::fillOpacity

(

)

const

Definition at line 121 of file LineChart.cpp.

geometryChange()

void LineChart::geometryChange ( const QRectF & newGeometry, const QRectF & oldGeometry )

overrideprotectedvirtual

Reimplemented from QQuickItem.

Definition at line 308 of file LineChart.cpp.

interpolate()

bool LineChart::interpolate

(

)

const

Definition at line 111 of file LineChart.cpp.

lineWidth()

qreal LineChart::lineWidth

(

)

const

Definition at line 116 of file LineChart.cpp.

onDataChanged()

void LineChart::onDataChanged ( )

overrideprotectedvirtual

Called when the data of a value source changes.

This method should be reimplemented by subclasses. It is called whenever the data of one of the value sources changes. Subclasses should use this to make sure that they update whatever internal state they use for rendering, then call update() to schedule rendering the item.

Implements Chart.

Definition at line 302 of file LineChart.cpp.

pointDelegate()

QQmlComponent * LineChart::pointDelegate

(

)

const

Definition at line 175 of file LineChart.cpp.

qmlAttachedProperties()

static LineChartAttached * LineChart::qmlAttachedProperties ( QObject * object )

inlinestatic

Definition at line 140 of file LineChart.h.

setFillColorSource()

void LineChart::setFillColorSource

(

ChartDataSource *

newFillColorSource

)

Definition at line 164 of file LineChart.cpp.

setFillOpacity()

void LineChart::setFillOpacity

(

qreal

opacity

)

Definition at line 148 of file LineChart.cpp.

setInterpolate()

void LineChart::setInterpolate

(

bool

newInterpolate

)

Definition at line 126 of file LineChart.cpp.

setLineWidth()

void LineChart::setLineWidth

(

qreal

width

)

Definition at line 137 of file LineChart.cpp.

setPointDelegate()

void LineChart::setPointDelegate

(

QQmlComponent *

newPointDelegate

)

Definition at line 180 of file LineChart.cpp.

updatePaintNode()

QSGNode * LineChart::updatePaintNode ( QSGNode * node, QQuickItem::UpdatePaintNodeData * data )

overrideprotected

Definition at line 271 of file LineChart.cpp.

updatePolish()

void LineChart::updatePolish ( )

overrideprotectedvirtual

Reimplemented from QQuickItem.

Definition at line 195 of file LineChart.cpp.

---

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

• LineChart.h
• LineChart.cpp