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  5. QBar3DSeries

QBar3DSeries Class

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

头： #include <QBar3DSeries>
CMake: find_package(Qt6 REQUIRED COMPONENTS DataVisualization)
target_link_libraries(mytarget PRIVATE Qt6::DataVisualization)
qmake: QT += datavisualization
Since: QtDataVisualization 1.0
实例化： Bar3DSeries
继承： QAbstract3DSeries

特性

公共函数

QBar3DSeries (QObject * parent = nullptr)
QBar3DSeries (QBarDataProxy * dataProxy , QObject * parent = nullptr)
virtual ~QBar3DSeries ()
QBarDataProxy * dataProxy () const
float meshAngle () const
QList<QColor> rowColors () const
QPoint selectedBar () const
void setDataProxy (QBarDataProxy * proxy )
void setMeshAngle (float angle )
void setRowColors (const QList<QColor> & colors )
void setSelectedBar (const QPoint & position )

信号

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

静态公共成员

QPoint invalidSelectionPosition ()

详细描述

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

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 it.

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

@rowTitle Title from row axis
@colTitle Title from column axis
@valueTitle Title from value axis
@rowIdx Visible row index. Localized using the graph locale.
@colIdx Visible column index. Localized using the graph locale.
@rowLabel Label from row axis
@colLabel Label from column axis
@valueLabel Item value formatted using the format of the value axis attached to the graph. For more information, see QValue3DAxis::labelFormat .
@seriesName Name of the series
%<format spec> Item value in the specified format. Formatted using the same rules as QValue3DAxis::labelFormat .

例如： 

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

另请参阅 Qt Data Visualization 数据处理 and QAbstract3DGraph::locale .

特性文档编制

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.

访问函数：

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

通知程序信号：

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))

注意： 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.

访问函数：

float meshAngle () const
void setMeshAngle (float angle )

通知程序信号：

void meshAngleChanged (float angle )

另请参阅 QAbstract3DSeries::meshRotation .

[since 6.3] 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 Q3DTheme::ColorStyle must be set to Q3DTheme::ColorStyleUniform to use this property.

This property was introduced in Qt 6.3.

访问函数：

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

通知程序信号：

void rowColorsChanged (const QList<QColor> & rowcolors )

另请参阅 Q3DTheme::ColorStyleUniform .

selectedBar : QPoint

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

访问函数：

QPoint selectedBar () const
void setSelectedBar (const QPoint & position )

通知程序信号：

void selectedBarChanged (const QPoint & position )

成员函数文档编制

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

Constructsa 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 .

[虚拟] QBar3DSeries:: ~QBar3DSeries ()

Deletes a bar 3D series.

[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.

另请参阅 QAbstract3DGraph::clearSelection ().

void QBar3DSeries:: setSelectedBar (const 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 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 to the series before the row of the selected bar will adjust the selection so that the same bar will stay selected.

注意： setter 函数对于特性 selectedBar .

另请参阅 selectedBar () 和 QAbstract3DGraph::clearSelection ().

内容