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QBar3DSeries Class

The QBar3DSeries class represents a data series in a 3D bar graph. More...

Header: #include <QBar3DSeries>
CMake: find_package(Qt6 REQUIRED COMPONENTS Graphs)
target_link_libraries(mytarget PRIVATE Qt6::Graphs)
qmake: QT += graphs
In QML: Bar3DSeries
Inherits: QAbstract3DSeries

Properties

Public Functions

QBar3DSeries(QObject *parent = nullptr)
QBar3DSeries(QBarDataProxy *dataProxy, QObject *parent = nullptr)
virtual ~QBar3DSeries() override
void clearArray()
void clearRow(qsizetype rowIndex)
QStringList columnLabels() const
QBarDataArray dataArray() &&
const QBarDataArray &dataArray() const &
QBarDataProxy *dataProxy() const
float meshAngle() const
QList<QColor> rowColors() const
QStringList rowLabels() const
QPoint selectedBar() const
void setColumnLabels(const QStringList &labels)
void setDataArray(const QBarDataArray &newDataArray)
void setDataProxy(QBarDataProxy *proxy)
void setMeshAngle(float angle)
void setRowColors(const QList<QColor> &colors)
void setRowLabels(const QStringList &labels)
void setSelectedBar(QPoint position)

Signals

void columnLabelsChanged()
void dataArrayChanged(const QBarDataArray &array)
void dataProxyChanged(QBarDataProxy *proxy)
void meshAngleChanged(float angle)
void rowColorsChanged(const QList<QColor> &rowcolors)
void rowLabelsChanged()
void selectedBarChanged(QPoint position)

Static Public Members

QPoint invalidSelectionPosition()

Detailed Description

This class manages the series specific visual elements, as well as the series data (via a data proxy).

Regarding the proxy-series relationship, it is crucial to highlight a couple of key points. In this context, data is stored in series and users can access the dataset through the series. This series is controlled or represented by a proxy object. Thus, the proxy can be used to manage various operations on the data and update the actual dataset. However, it is necessary to create a series associated with this proxy to edit the dataset.

If no data proxy is set explicitly for the series, the series creates a default proxy. Setting another proxy will destroy the existing proxy and all data added to the series.

QBar3DSeries supports the following format tags for QAbstract3DSeries::setItemLabelFormat():

@rowTitleTitle from row axis
@colTitleTitle from column axis
@valueTitleTitle from value axis
@rowIdxVisible row index. Localized using the graph locale.
@colIdxVisible column index. Localized using the graph locale.
@rowLabelLabel from row axis
@colLabelLabel from column axis
@valueLabelItem value formatted using the format of the value axis attached to the graph. For more information, see QValue3DAxis::labelFormat.
@seriesNameName of the series
%<format spec>Item value in the specified format. Formatted using the same rules as QValue3DAxis::labelFormat.

For example:

proxy->setItemLabelFormat(QStringLiteral("@valueTitle for (@rowLabel, @colLabel): %.1f"));

See also Qt Graphs Data Handling with 3D and Q3DGraphsWidgetItem::locale.

Property Documentation

columnLabels : QStringList

This property holds the optional column labels for the array.

Indexes in this array match column indexes in rows. If the list is shorter than the longest row, all columns will not get labels.

Access functions:

QStringList columnLabels() const
void setColumnLabels(const QStringList &labels)

Notifier signal:

void columnLabelsChanged()

dataArray : QBarDataArray

Data array for the series.

Holds the reference of the data array.

dataArrayChanged signal is emitted when data array is set, unless newDataArray is identical to the previous one.

Note: Before doing anything regarding the dataArray, a series must be created for the relevant proxy.

Access functions:

const QBarDataArray &dataArray() const &
QBarDataArray dataArray() &&
void setDataArray(const QBarDataArray &newDataArray)

Notifier signal:

void dataArrayChanged(const QBarDataArray &array)

See also clearRow(qsizetype rowIndex) and clearArray().

dataProxy : QBarDataProxy*

This property holds the active data proxy.

The series assumes ownership of any proxy set to it and deletes any previously set proxy when a new one is added. The proxy cannot be null or set to another series.

Access functions:

QBarDataProxy *dataProxy() const
void setDataProxy(QBarDataProxy *proxy)

Notifier signal:

void dataProxyChanged(QBarDataProxy *proxy)

meshAngle : float

This property holds the series rotation angle in degrees.

Setting this property is equivalent to the following call:

setMeshRotation(QQuaternion::fromAxisAndAngle(0.0f, 1.0f, 0.0f, angle))

Note: When reading this property, it is calculated from the QAbstract3DSeries::meshRotation value using floating point precision and always returns a value from zero to 360 degrees.

Access functions:

float meshAngle() const
void setMeshAngle(float angle)

Notifier signal:

void meshAngleChanged(float angle)

See also QAbstract3DSeries::meshRotation.

rowColors : QList<QColor>

This property holds the list of row colors in the series.

This property can be used to color the rows of the series in different colors. The QGraphsTheme::ColorStyle must be set to QGraphsTheme::ColorStyle::Uniform to use this property.

Access functions:

QList<QColor> rowColors() const
void setRowColors(const QList<QColor> &colors)

Notifier signal:

void rowColorsChanged(const QList<QColor> &rowcolors)

See also QGraphsTheme::ColorStyle::Uniform.

rowLabels : QStringList

This property holds the optional row labels for the array.

Indexes in this array match the row indexes in the data array. If the list is shorter than the number of rows, all rows will not get labels.

Access functions:

QStringList rowLabels() const
void setRowLabels(const QStringList &labels)

Notifier signal:

void rowLabelsChanged()

selectedBar : QPoint

This property holds the bar in the series that is selected.

Access functions:

QPoint selectedBar() const
void setSelectedBar(QPoint position)

Notifier signal:

void selectedBarChanged(QPoint position)

Member Function Documentation

[explicit] QBar3DSeries::QBar3DSeries(QObject *parent = nullptr)

Constructs a bar 3D series with the parent parent.

[explicit] QBar3DSeries::QBar3DSeries(QBarDataProxy *dataProxy, QObject *parent = nullptr)

Constructs a bar 3D series with the data proxy dataProxy and the parent parent.

[override virtual noexcept] QBar3DSeries::~QBar3DSeries()

Deletes a bar 3D series.

void QBar3DSeries::clearArray()

Clears the existing array.

void QBar3DSeries::clearRow(qsizetype rowIndex)

Clears the existing row in the array according to given rowIndex.

[static] QPoint QBar3DSeries::invalidSelectionPosition()

Returns an invalid position for selection. This position is set to the selectedBar property to clear the selection from this series.

See also Q3DGraphsWidgetItem::clearSelection().

void QBar3DSeries::setSelectedBar(QPoint position)

Selects the bar at the position position, specified as a row and column in the data array of the series.

Only one bar can be selected at a time.

To clear the selection from this series, invalidSelectionPosition() is set as position.

If this series is added to a graph, the graph can adjust the selection according to user interaction or if it becomes invalid. Selecting a bar on another added series will also clear the selection.

Removing rows from or inserting rows into the series before the row of the selected bar will adjust the selection so that the same bar will stay selected.

Note: Setter function for property selectedBar.

See also selectedBar() and Q3DGraphsWidgetItem::clearSelection().

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