就业培训     下载中心     Wiki     联络 登录   注册
  1. 首页
  2. Qt 6.5.1
  3. Qt Charts
  4. C++ 类
  5. QXYSeries

QXYSeries 类

The QXYSeries class is a base class for line, spline, and scatter series. 更多...

头： #include <QXYSeries>
实例化： XYSeries
继承： QAbstractSeries
继承者： QLineSeries and QScatterSeries

公共类型

enum class PointConfiguration { Color, Size, Visibility, LabelVisibility, LabelFormat }

特性

公共函数

virtual ~QXYSeries ()
void append (qreal x , qreal y )
void append (const QPointF & point )
void append (const QList<QPointF> & points )
const QPointF & at (int index ) const
QColor bestFitLineColor () const
QPair<qreal, qreal> bestFitLineEquation (bool & ok ) const
bool bestFitLineVisible () const
QBrush brush () const
void clear ()
void clearPointConfiguration (const int index )
void clearPointConfiguration (const int index , const QXYSeries::PointConfiguration key )
void clearPointsConfiguration ()
void clearPointsConfiguration (const QXYSeries::PointConfiguration key )
virtual QColor color () const
void colorBy (const QList<qreal> & sourceData , const QLinearGradient & gradient = QLinearGradient())
int count () const
void deselectAllPoints ()
void deselectPoint (int index )
void deselectPoints (const QList<int> & indexes )
void insert (int index , const QPointF & point )
bool isPointSelected (int index )
const QImage & lightMarker () const
qreal markerSize () const
QPen pen () const
QHash<QXYSeries::PointConfiguration, QVariant> pointConfiguration (const int index ) const
bool pointLabelsClipping () const
QColor pointLabelsColor () const
QFont pointLabelsFont () const
QString pointLabelsFormat () const
bool pointLabelsVisible () const
QList<QPointF> points () const
QHash<int, QHash<QXYSeries::PointConfiguration, QVariant>> pointsConfiguration () const
bool pointsVisible () const
void remove (qreal x , qreal y )
void remove (const QPointF & point )
void remove (int index )
void removePoints (int index , int count )
void replace (qreal oldX , qreal oldY , qreal newX , qreal newY )
void replace (const QPointF & oldPoint , const QPointF & newPoint )
void replace (int index , qreal newX , qreal newY )
void replace (int index , const QPointF & newPoint )
void replace (const QList<QPointF> & points )
void selectAllPoints ()
void selectPoint (int index )
void selectPoints (const QList<int> & indexes )
const QImage & selectedLightMarker () const
QList<int> selectedPoints () const
void setBestFitLineColor (const QColor & color )
void setBestFitLineVisible (bool visible = true)
virtual void setBrush (const QBrush & brush )
virtual void setColor (const QColor & color )
void setLightMarker (const QImage & lightMarker )
void setMarkerSize (qreal size )
virtual void setPen (const QPen & pen )
void setPointConfiguration (const int index , const QHash<QXYSeries::PointConfiguration, QVariant> & configuration )
void setPointConfiguration (const int index , const QXYSeries::PointConfiguration key , const QVariant & value )
void setPointLabelsClipping (bool enabled = true)
void setPointLabelsColor (const QColor & color )
void setPointLabelsFont (const QFont & font )
void setPointLabelsFormat (const QString & format )
void setPointLabelsVisible (bool visible = true)
void setPointSelected (int index , bool selected )
void setPointsConfiguration (const QHash<int, QHash<QXYSeries::PointConfiguration, QVariant>> & pointsConfiguration )
void setPointsVisible (bool visible = true)
void setSelectedColor (const QColor & color )
void setSelectedLightMarker (const QImage & selectedLightMarker )
void sizeBy (const QList<qreal> & sourceData , const qreal minSize , const qreal maxSize )
void toggleSelection (const QList<int> & indexes )
QXYSeries & operator<< (const QPointF & point )
QXYSeries & operator<< (const QList<QPointF> & points )

信号

void bestFitLineColorChanged (const QColor & color )
void bestFitLineVisibilityChanged (bool visible )
void clicked (const QPointF & point )
void colorChanged (QColor color )
void doubleClicked (const QPointF & point )
void hovered (const QPointF & point , bool state )
void lightMarkerChanged (const QImage & lightMarker )
void markerSizeChanged (qreal size )
void penChanged (const QPen & pen )
void pointAdded (int index )
void pointLabelsClippingChanged (bool clipping )
void pointLabelsColorChanged (const QColor & color )
void pointLabelsFontChanged (const QFont & font )
void pointLabelsFormatChanged (const QString & format )
void pointLabelsVisibilityChanged (bool visible )
void pointRemoved (int index )
void pointReplaced (int index )
void pointsRemoved (int index , int count )
void pointsReplaced ()
void pressed (const QPointF & point )
void released (const QPointF & point )
void selectedColorChanged (const QColor & color )
void selectedPointsChanged ()

详细描述

QXYSeries supports displaying best fit line on a chart. Best fit line is a line through a chart that expresses the relationship between points.

成员类型文档编制

[since 6.2] enum class QXYSeries:: PointConfiguration

This enum value describes the particular configuration of a point.

常量 值 描述
QXYSeries::PointConfiguration::Color 0 This enum value can be used to change a point's color. If used together with QXYSeries::setPointConfiguration , the configuration's value should be a valid QColor .
QXYSeries::PointConfiguration::Size 1 This enum value can be used to change a point's size. If used together with QXYSeries::setPointConfiguration , the configuration's value should be a number, such as qreal or int .
QXYSeries::PointConfiguration::Visibility 2 This enum value can be used to hide or show the point. If used together with QXYSeries::setPointConfiguration , the configuration's value should be boolean.
QXYSeries::PointConfiguration::LabelVisibility 3 This enum value can be used to hide or show the label of the point. If used together with QXYSeries::setPointConfiguration , the configuration's value should be boolean.
QXYSeries::PointConfiguration::LabelFormat (since Qt 6.5) 4 This enum value can be used to set custom label text per-point. If used together with QXYSeries::setPointConfiguration , the configuration's value should be a string.

注意： If an empty string is set as the LabelFormat, it will be ignored, and the series pointLabelsFormat 会被使用。

This enum was introduced or modified in Qt 6.2.

另请参阅 pointLabelsFormat and setPointConfiguration ().

特性文档编制

[since 6.2] bestFitLineColor : QColor

This property holds the color of best fit line.

该特性在 Qt 6.2 引入。

访问函数：

QColor bestFitLineColor () const
void setBestFitLineColor (const QColor & color )

通知程序信号：

void bestFitLineColorChanged (const QColor & color )

另请参阅 bestFitLineEquation and bestFitLineVisible .

[since 6.2] bestFitLineVisible : bool

This property holds the visibility of the best fit line.

此特性是 false 在默认情况下。

该特性在 Qt 6.2 引入。

访问函数：

bool bestFitLineVisible () const
void setBestFitLineVisible (bool visible = true)

通知程序信号：

void bestFitLineVisibilityChanged (bool visible )

另请参阅 bestFitLineEquation .

color : QColor

此特性保持系列的颜色。

This is the line (pen) color in case of QLineSeries or QSplineSeries and the fill (brush) color in case of QScatterSeries or QAreaSeries .

访问函数：

virtual QColor color () const
virtual void setColor (const QColor & color )

通知程序信号：

void colorChanged (QColor color )

另请参阅 pen () 和 brush ().

pointLabelsClipping : bool

This property holds the clipping for data point labels.

此特性是 true by default. The labels on the edge of the plot area are cut when clipping is enabled.

访问函数：

bool pointLabelsClipping () const
void setPointLabelsClipping (bool enabled = true)

通知程序信号：

void pointLabelsClippingChanged (bool clipping )

另请参阅 pointLabelsVisible .

pointLabelsColor : QColor

This property holds the color used for data point labels. By default, the color is the color of the brush defined in theme for labels.

访问函数：

QColor pointLabelsColor () const
void setPointLabelsColor (const QColor & color )

通知程序信号：

void pointLabelsColorChanged (const QColor & color )

另请参阅 pointLabelsFormat .

pointLabelsFont : QFont

This property holds the font used for data point labels.

访问函数：

QFont pointLabelsFont () const
void setPointLabelsFont (const QFont & font )

通知程序信号：

void pointLabelsFontChanged (const QFont & font )

另请参阅 pointLabelsFormat .

pointLabelsFormat : QString

This property holds the format used for showing labels with data points.

QXYSeries supports the following format tags:

@index The index in the series of the data point. [since 6.5]
@xPoint The x-coordinate of the data point.
@yPoint The y-coordinate of the data point.

For example, the following usage of the format tags would produce labels that display the data point shown inside brackets separated by a comma (x, y): 

series->setPointLabelsFormat("@index: (@xPoint, @yPoint)");

By default, the labels' format is set to @xPoint, @yPoint . The labels are shown on the plot area, and the labels on the edge of the plot area are cut. If the points are close to each other, the labels may overlap.

访问函数：

QString pointLabelsFormat () const
void setPointLabelsFormat (const QString & format )

通知程序信号：

void pointLabelsFormatChanged (const QString & format )

另请参阅 pointLabelsVisible , pointLabelsFont ，和 pointLabelsColor .

pointLabelsVisible : bool

此特性保持数据点标签的可见性。

此特性是 false 在默认情况下。

访问函数：

bool pointLabelsVisible () const
void setPointLabelsVisible (bool visible = true)

通知程序信号：

void pointLabelsVisibilityChanged (bool visible )

另请参阅 pointLabelsFormat and pointLabelsClipping .

pointsVisible : bool

This property holds whether the data points are visible and should be drawn.

访问函数：

bool pointsVisible () const
void setPointsVisible (bool visible = true)

[since 6.2] selectedColor : QColor

This property holds the color of the selected points.

This is the fill (brush) color of points marked as selected. If not specified, value of QXYSeries::color is used as default.

该特性在 Qt 6.2 引入。

访问函数：

virtual QColor color () const
void setSelectedColor (const QColor & color )

通知程序信号：

void selectedColorChanged (const QColor & color )

另请参阅 color .

成员函数文档编制

[虚拟] QXYSeries:: ~QXYSeries ()

删除系列。系列被添加到 QChart instances are owned by them, and are deleted when the QChart instances are deleted.

void QXYSeries:: append ( qreal x , qreal y )

添加的数据点带坐标 x and y 到系列。

void QXYSeries:: append (const QPointF & point )

这是重载函数。

添加数据点 point 到系列。

void QXYSeries:: append (const QList < QPointF > & points )

这是重载函数。

Adds the list of data points specified by points 到系列。

const QPointF &QXYSeries:: at ( int index ) const

Returns the data point at the position specified by index in the internal series of points.

[signal] void QXYSeries:: bestFitLineColorChanged (const QColor & color )

This signal is emitted when the color used for the best fit line changes to color .

注意： 通知程序信号对于特性 bestFitLineColor .

[since 6.2] QPair < qreal , qreal > QXYSeries:: bestFitLineEquation ( bool & ok ) const

Returns a pair of numbers where the first number is a slope factor and the second number is intercept of a linear function for a best fit line.

Those factors are calculated using Least Squares Method based on points passed to the series.

参数 ok is used to report a failure by setting its value to false and to report a success by setting its value to true .

该函数在 Qt 6.2 引入。

另请参阅 QXYSeries::bestFitLineVisible ().

[signal] void QXYSeries:: bestFitLineVisibilityChanged ( bool visible )

This signal is emitted when the visibility of the best fit line changes to visible .

注意： 通知程序信号对于特性 bestFitLineVisible .

QBrush QXYSeries:: brush () const

Returns the brush used to fill the data points for the series.

另请参阅 setBrush ().

void QXYSeries:: clear ()

从系列删除所有点。

另请参阅 pointsRemoved ().

[since 6.2] void QXYSeries:: clearPointConfiguration (const int index )

Removes the configuration of a point located at index and restores the default look derived from the series' settings.

注意： It doesn't affect the configuration of other points.

该函数在 Qt 6.2 引入。

另请参阅 clearPointsConfiguration () 和 setPointConfiguration ().

[since 6.2] void QXYSeries:: clearPointConfiguration (const int index , const QXYSeries::PointConfiguration key )

Removes the configuration property identified by key from the point at index and restores the default look derived from the series' settings.

Removes the configuration type, such as color or size, specified by key from the point at index with configuration customizations, allowing that configuration property to be rendered as the default specified in the series' properties.

注意： It doesn't affect the configuration of other points.

该函数在 Qt 6.2 引入。

另请参阅 clearPointsConfiguration () 和 setPointConfiguration ().

[since 6.2] void QXYSeries:: clearPointsConfiguration ()

Removes the configuration of all points in the series and restores the default look derived from the series' settings.

该函数在 Qt 6.2 引入。

另请参阅 setPointConfiguration ().

[since 6.2] void QXYSeries:: clearPointsConfiguration (const QXYSeries::PointConfiguration key )

Removes the configuration property identified by key from all points and restores the default look derived from the series' settings.

Removes the configuration type, such as color or size, specified by key from all points with configuration customizations, allowing that configuration property to be rendered as the default specified in the series properties.

该函数在 Qt 6.2 引入。

另请参阅 clearPointsConfiguration () 和 setPointConfiguration ().

[signal] void QXYSeries:: clicked (const QPointF & point )

This signal is emitted when the user triggers a mouse event by clicking the point point in the chart.

另请参阅 pressed (), released ()，和 doubleClicked ().

[since 6.2] void QXYSeries:: colorBy (const QList < qreal > & sourceData , const QLinearGradient & gradient = QLinearGradient())

Sets the points' color according to a passed list of values. Values from sourceData are sorted and mapped to the gradient .

If the series has a QColorAxis attached, then a gradient from the axis is going to be used.

该函数在 Qt 6.2 引入。

另请参阅 setPointConfiguration (), pointConfiguration ()，和 QColorAxis .

[signal] void QXYSeries:: colorChanged ( QColor color )

This signal is emitted when the line (pen) color changes to color .

注意： 通知程序信号对于特性 color .

int QXYSeries:: count () const

返回系列中的数据点数。

[since 6.2] void QXYSeries:: deselectAllPoints ()

Deselects all points in the series.

注意： Emits QXYSeries::selectedPointsChanged

该函数在 Qt 6.2 引入。

另请参阅 setPointSelected ().

[since 6.2] void QXYSeries:: deselectPoint ( int index )

Deselects point at given index .

注意： Emits QXYSeries::selectedPointsChanged

该函数在 Qt 6.2 引入。

另请参阅 setPointSelected ().

[since 6.2] void QXYSeries:: deselectPoints (const QList < int > & indexes )

Marks multiple points passed in a indexes list as deselected.

注意： Emits QXYSeries::selectedPointsChanged

该函数在 Qt 6.2 引入。

另请参阅 setPointSelected ().

[signal] void QXYSeries:: doubleClicked (const QPointF & point )

This signal is emitted when the user double-clicks the data point point in the chart. The point is the point where the first press was triggered.

另请参阅 pressed (), released ()，和 clicked ().

[signal] void QXYSeries:: hovered (const QPointF & point , bool state )

This signal is emitted when a mouse is hovered over the point point in the chart. When the mouse moves over the point, state turns true , and when the mouse moves away again, it turns false .

void QXYSeries:: insert ( int index , const QPointF & point )

Inserts the data point point in the series at the position specified by index .

另请参阅 pointAdded ().

[since 6.2] bool QXYSeries:: isPointSelected ( int index )

Returns true if point at given index is among selected points and false otherwise.

注意： Selected points are drawn using the selected color if it was specified.

该函数在 Qt 6.2 引入。

另请参阅 selectedPoints (), setPointSelected ()，和 setSelectedColor ().

[since 6.2] const QImage &QXYSeries:: lightMarker () const

Gets the image used for drawing markers on each point of the series.

The default value is QImage(), meaning no light marker will be painted.

The light markers visualize the data points of this series and as such are an alternative to setPointsVisible (true). Both features can be enabled independently from each other.

Unlike the elements of QScatterSeries the light markers are not represented by QGraphicsItem , but are just painted (no objects created). However, the mouse-event-signals of QXYSeries behave the same way, meaning that you'll get the exact domain value of the point if you click/press/hover the light marker. You'll still get the in between domain value if you click on the line. The light markers are above the line in terms of painting as well as events.

该函数在 Qt 6.2 引入。

另请参阅 QXYSeries::setLightMarker ().

[signal, since 6.2] void QXYSeries:: lightMarkerChanged (const QImage & lightMarker )

This signal is emitted when the light marker image changes to lightMarker .

该函数在 Qt 6.2 引入。

另请参阅 QXYSeries::setLightMarker ().

[since 6.2] qreal QXYSeries:: markerSize () const

Gets the size of the marker used to render points in the series.

The default size depends on the specific QXYSeries 类型。 QScatterSeries has a default of 15.0 QLineSeries has a default of the series pen size * 1.5

该函数在 Qt 6.2 引入。

另请参阅 setMarkerSize () 和 QScatterSeries::markerSize .

[signal] void QXYSeries:: markerSizeChanged ( qreal size )

This signal is emitted when the marker size changes to size .

QPen QXYSeries:: pen () const

返回用于绘制系列数据点轮廓的钢笔。

另请参阅 setPen ().

[signal] void QXYSeries:: penChanged (const QPen & pen )

此信号被发射当钢笔更改为 pen .

[signal] void QXYSeries:: pointAdded ( int index )

This signal is emitted when a point is added at the position specified by index .

另请参阅 append () 和 insert ().

[since 6.2] QHash < QXYSeries::PointConfiguration , QVariant > QXYSeries:: pointConfiguration (const int index ) const

Returns a map representing the configuration of a point at index .

With points configuration you can change various aspects of each point's look.

该函数在 Qt 6.2 引入。

另请参阅 setPointConfiguration ().

[signal] void QXYSeries:: pointLabelsClippingChanged ( bool clipping )

This signal is emitted when the clipping of the data point labels changes to clipping .

注意： 通知程序信号对于特性 pointLabelsClipping .

[signal] void QXYSeries:: pointLabelsColorChanged (const QColor & color )

This signal is emitted when the color used for data point labels changes to color .

注意： 通知程序信号对于特性 pointLabelsColor .

[signal] void QXYSeries:: pointLabelsFontChanged (const QFont & font )

This signal is emitted when the font used for data point labels changes to font .

注意： 通知程序信号对于特性 pointLabelsFont .

[signal] void QXYSeries:: pointLabelsFormatChanged (const QString & format )

This signal is emitted when the format of data point labels changes to format .

注意： 通知程序信号对于特性 pointLabelsFormat .

[signal] void QXYSeries:: pointLabelsVisibilityChanged ( bool visible )

This signal is emitted when the visibility of the data point labels changes to visible .

注意： 通知程序信号对于特性 pointLabelsVisible .

[signal] void QXYSeries:: pointRemoved ( int index )

This signal is emitted when a point is removed from the position specified by index .

另请参阅 remove ().

[signal] void QXYSeries:: pointReplaced ( int index )

This signal is emitted when a point is replaced at the position specified by index .

另请参阅 replace ().

QList < QPointF > QXYSeries:: points () const

Returns the points in the series.

[since 6.2] QHash < int , QHash < QXYSeries::PointConfiguration , QVariant >> QXYSeries:: pointsConfiguration () const

Returns a map with points' indexes as keys and points' configuration as values.

该函数在 Qt 6.2 引入。

另请参阅 setPointsConfiguration (), setPointConfiguration ()，和 pointConfiguration ().

[signal] void QXYSeries:: pointsRemoved ( int index , int count )

This signal is emitted when the number of points specified by count is removed starting at the position specified by index .

另请参阅 removePoints () 和 clear ().

[signal] void QXYSeries:: pointsReplaced ()

This signal is emitted when all points are replaced with other points.

另请参阅 replace ().

[signal] void QXYSeries:: pressed (const QPointF & point )

This signal is emitted when the user presses the data point point in the chart and holds down the mouse button.

另请参阅 clicked (), released ()，和 doubleClicked ().

[signal] void QXYSeries:: released (const QPointF & point )

This signal is emitted when the user releases the mouse press on the data point specified by point .

另请参阅 pressed (), clicked ()，和 doubleClicked ().

void QXYSeries:: remove ( qreal x , qreal y )

Removes the point that has the coordinates x and y from the series.

另请参阅 pointRemoved ().

void QXYSeries:: remove (const QPointF & point )

Removes the data point point from the series.

另请参阅 pointRemoved ().

void QXYSeries:: remove ( int index )

Removes the point at the position specified by index from the series.

另请参阅 pointRemoved ().

void QXYSeries:: removePoints ( int index , int count )

Removes the number of points specified by count from the series starting at the position specified by index .

另请参阅 pointsRemoved ().

void QXYSeries:: replace ( qreal oldX , qreal oldY , qreal newX , qreal newY )

Replaces the point with the coordinates oldX and oldY with the point with the coordinates newX and newY . Does nothing if the old point does not exist.

另请参阅 pointReplaced ().

void QXYSeries:: replace (const QPointF & oldPoint , const QPointF & newPoint )

Replaces the point specified by oldPoint with the one specified by newPoint .

另请参阅 pointReplaced ().

void QXYSeries:: replace ( int index , qreal newX , qreal newY )

Replaces the point at the position specified by index with the point that has the coordinates newX and newY .

另请参阅 pointReplaced ().

void QXYSeries:: replace ( int index , const QPointF & newPoint )

Replaces the point at the position specified by index with the point specified by newPoint .

另请参阅 pointReplaced ().

void QXYSeries:: replace (const QList < QPointF > & points )

Replaces the current points with the points specified by points .

注意： This is much faster than replacing data points one by one, or first clearing all data, and then appending the new data. Emits QXYSeries::pointsReplaced () when the points have been replaced.

另请参阅 pointsReplaced ().

[since 6.2] void QXYSeries:: selectAllPoints ()

Marks all points in the series as selected,

注意： Emits QXYSeries::selectedPointsChanged

该函数在 Qt 6.2 引入。

另请参阅 setPointSelected ().

[since 6.2] void QXYSeries:: selectPoint ( int index )

Marks point at index as selected.

注意： Emits QXYSeries::selectedPointsChanged

该函数在 Qt 6.2 引入。

另请参阅 setPointSelected ().

[since 6.2] void QXYSeries:: selectPoints (const QList < int > & indexes )

Marks multiple points passed in a indexes list as selected.

注意： Emits QXYSeries::selectedPointsChanged

该函数在 Qt 6.2 引入。

另请参阅 setPointSelected ().

[since 6.2] const QImage &QXYSeries:: selectedLightMarker () const

Returns the image used for drawing markers on selected series' points.

The default value is QImage(), meaning usual lightMarker () will be painted.

这相当于 selectedColor if you prefer light markers over normal points, but still want to distinguish selected points.

该函数在 Qt 6.2 引入。

另请参阅 setSelectedLightMarker (), lightMarker (), selectedColor ，和 setPointSelected ().

[since 6.2] QList < int > QXYSeries:: selectedPoints () const

Returns a list of points indexes marked as selected. Selected points are visible regardless of points visibility.

该函数在 Qt 6.2 引入。

另请参阅 setPointSelected () 和 pointsVisible ().

[signal] void QXYSeries:: selectedPointsChanged ()

This signal is emitted when the points selection changes.

[虚拟] void QXYSeries:: setBrush (const QBrush & brush )

Sets the brush used for drawing points on the chart to brush . If the brush is not defined, the brush from the chart theme setting is used.

另请参阅 brush () 和 QChart::setTheme ().

[since 6.2] void QXYSeries:: setLightMarker (const QImage & lightMarker )

Sets the image used for drawing markers on each point of the series as the value of lightMarker .

The default value is a default-QImage() ( QImage::isNull () == true), meaning no light marker will be painted. You can reset back to default (disabled) by calling this function with a null QImage (QImage()).

The light markers visualize the data points of this series and as such are an alternative to setPointsVisible(true) . If a light marker is set with this method, visible points as set with setPointsVisible(true) are not displayed.

Unlike the elements of QScatterSeries the light markers are not represented by QGraphicsItem , but are just painted (no objects created). However, the mouse-event-signals of QXYSeries behave the same way, meaning that you'll get the exact domain value of the point if you click/press/hover the light marker. You'll still get the in between domain value if you click on the line. The light markers are above the line in terms of painting as well as events.

该函数在 Qt 6.2 引入。

另请参阅 QXYSeries::lightMarker ().

[since 6.2] void QXYSeries:: setMarkerSize ( qreal size )

设置 size of the marker used to render points in the series.

The default size is 15.0.

该函数在 Qt 6.2 引入。

另请参阅 QScatterSeries::markerSize .

[虚拟] void QXYSeries:: setPen (const QPen & pen )

将用于在图表中绘制点的钢笔设为 pen 。若钢笔未定义，则使用来自图表主题的钢笔。

另请参阅 pen () 和 QChart::setTheme ().

[since 6.2] void QXYSeries:: setPointConfiguration (const int index , const QHash < QXYSeries::PointConfiguration , QVariant > & configuration )

Enables customizing the appearance of a point located at index with desired configuration .

With points configuration you can change various aspects of every point's appearance.

A point's configuration is represented as a hash map with QXYSeries::pointConfiguration 键和 QVariant values. For example: 

QLineSeries *series = new QLineSeries();
series->setName("Customized series");
series->setPointsVisible(true);
*series << QPointF(0, 6) << QPointF(2, 4) << QPointF(3, 6) << QPointF(7, 4) << QPointF(10, 5)
        << QPointF(11, 1) << QPointF(13, 3) << QPointF(17, 6) << QPointF(18, 3)
        << QPointF(20, 2);
QChart *chart = new QChart();
chart->addSeries(series);
chart->createDefaultAxes();
QHash<QXYSeries::PointConfiguration, QVariant> conf;
conf[QXYSeries::PointConfiguration::Color] = QColor(Qt::red);
conf[QXYSeries::PointConfiguration::Size] = 8;
conf[QXYSeries::PointConfiguration::LabelVisibility] = true;
series->setPointConfiguration(4, conf);
conf.remove(QXYSeries::PointConfiguration::Color);
conf[QXYSeries::PointConfiguration::LabelFormat] = "This Point";
series->setPointConfiguration(6, conf);

In this example, you can see a default QLineSeries with 10 points and with changed configuration of two points. Both changed points are visibly bigger than the others with a look derived from the series configuration. By default, points don't have labels, but the point at index 4 has a label thanks to the QXYSeries::PointConfiguration::LabelVisibility and QXYSeries::PointConfiguration::LabelFormat configuration values. The point at index 6 has a custom label This Point thanks to the QXYSeries::PointConfiguration::LabelFormat configuration value. Below is an example of a chart created in this way:

该函数在 Qt 6.2 引入。

另请参阅 pointConfiguration (), pointsConfiguration ()，和 clearPointsConfiguration ().

[since 6.2] void QXYSeries:: setPointConfiguration (const int index , const QXYSeries::PointConfiguration key , const QVariant & value )

Enables customizing a particular aspect of a point's configuration.

注意： Points configuration concept provides a flexible way to configure various aspects of a point's appearance. Thus, values need to have an elastic type such as QVariant 。见 QXYSeries::PointConfiguration to see what value should be passed for certain key .

该函数在 Qt 6.2 引入。

另请参阅 pointsConfiguration ().

[since 6.2] void QXYSeries:: setPointSelected ( int index , bool selected )

Marks point at given index as either selected or deselected as specified by selected .

注意： Selected points are drawn using the selected color if it was specified. Emits QXYSeries::selectedPointsChanged

该函数在 Qt 6.2 引入。

另请参阅 isPointSelected (), setPointSelected(), and setSelectedColor ().

[since 6.2] void QXYSeries:: setPointsConfiguration (const QHash < int , QHash < QXYSeries::PointConfiguration , QVariant >> & pointsConfiguration )

Enables customizing the configuration of multiple points as specified by pointsConfiguration .

该函数在 Qt 6.2 引入。

另请参阅 pointsConfiguration ().

[since 6.2] void QXYSeries:: setSelectedLightMarker (const QImage & selectedLightMarker )

Sets the image used for drawing markers on selected series's points to selectedLightMarker .

The default value is QImage(), meaning usual lightMarker () will be painted.

This is an equivalent for selectedColor if you prefer light markers over normal points, but still want to distinguish selected points.

该函数在 Qt 6.2 引入。

另请参阅 selectedLightMarker (), lightMarker (), selectedColor ，和 setPointSelected ().

[since 6.2] void QXYSeries:: sizeBy (const QList < qreal > & sourceData , const qreal minSize , const qreal maxSize )

Sets the points' sizes according to a passed list of values. Values from sourceData are sorted and mapped to a point size which is between minSize and maxSize .

注意： 若 sourceData length is smaller than number of points in the series, then size of the points at the end of the series will stay the same.

该函数在 Qt 6.2 引入。

另请参阅 setPointConfiguration () 和 pointConfiguration ().

[since 6.2] void QXYSeries:: toggleSelection (const QList < int > & indexes )

Changes selection state of points at given indexes to the opposite one. Makes

注意： Emits QXYSeries::selectedPointsChanged

该函数在 Qt 6.2 引入。

另请参阅 setPointSelected ().

QXYSeries &QXYSeries:: operator<< (const QPointF & point )

流运算符用于添加数据点 point 到系列。

另请参阅 append ().

QXYSeries &QXYSeries:: operator<< (const QList < QPointF > & points )

流运算符用于添加数据点列表指定通过 points 到系列。

另请参阅 append ().

内容