QXYSeries Class

This enum value describes the particular configuration of a point.

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This property holds the color of best fit line.

This property was introduced in Qt 6.2.

Access functions:

• bestFitLineColor() const

• void setBestFitLineColor(const &color)

Notifier signal:

• void bestFitLineColorChanged(const &color)

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This property holds the visibility of the best fit line.

This property is false by default.

This property was introduced in Qt 6.2.

Access functions:

• bool bestFitLineVisible() const

• void setBestFitLineVisible(bool visible = true)

Notifier signal:

• void bestFitLineVisibilityChanged(bool visible)

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This property holds the color of the series.

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

Access functions:

• virtual color() const

• virtual void setColor(const &color)

Notifier signal:

• void colorChanged( color)

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This property holds the clipping for data point labels.

This property is true by default. The labels on the edge of the plot area are cut when clipping is enabled.

Access functions:

• bool pointLabelsClipping() const

• void setPointLabelsClipping(bool enabled = true)

Notifier signal:

• void pointLabelsClippingChanged(bool clipping)

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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.

Access functions:

• pointLabelsColor() const

• void setPointLabelsColor(const &color)

Notifier signal:

• void pointLabelsColorChanged(const &color)

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This property holds the font used for data point labels.

Access functions:

• pointLabelsFont() const

• void setPointLabelsFont(const &font)

Notifier signal:

• void pointLabelsFontChanged(const &font)

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

QXYSeries supports the following format tags:

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("(@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.

Access functions:

• pointLabelsFormat() const

• void setPointLabelsFormat(const &format)

Notifier signal:

• void pointLabelsFormatChanged(const &format)

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This property holds the visibility of data point labels.

This property is false by default.

Access functions:

• bool pointLabelsVisible() const

• void setPointLabelsVisible(bool visible = true)

Notifier signal:

• void pointLabelsVisibilityChanged(bool visible)

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

Access functions:

• bool pointsVisible() const

• void setPointsVisible(bool visible = true)

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.

This property was introduced in Qt 6.2.

Access functions:

• virtual color() const

• void setSelectedColor(const &color)

Notifier signal:

• void selectedColorChanged(const &color)

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Deletes the series. Series added to QChart instances are owned by them, and are deleted when the QChart instances are deleted.

Adds the data point with the coordinates x and y to the series.

This is an overloaded function.

Adds the data point point to the series.

This is an overloaded function.

Adds the list of data points specified by points to the series.

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

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

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.

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

This function was introduced in Qt 6.2.

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

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

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Removes all points from the series.

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

This function was introduced in Qt 6.2.

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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.

This function was introduced in Qt 6.2.

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

This function was introduced in Qt 6.2.

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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.

This function was introduced in Qt 6.2.

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

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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.

This function was introduced in Qt 6.2.

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

Returns the number of data points in a series.

Deselects all points in the series.

This function was introduced in Qt 6.2.

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Deselects point at given index.

This function was introduced in Qt 6.2.

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Marks multiple points passed in a indexes list as deselected.

This function was introduced in Qt 6.2.

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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.

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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.

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

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

This function was introduced in Qt 6.2.

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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.

This function was introduced in Qt 6.2.

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

This function was introduced in Qt 6.2.

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

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

This function was introduced in Qt 6.2.

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

Returns the pen used to draw the outline of the data points for the series.

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This signal is emitted when the pen changes to pen.

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

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

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

This function was introduced in Qt 6.2.

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

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

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

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

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

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

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

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Returns the points in the series.

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

This function was introduced in Qt 6.2.

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

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

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

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

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

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Removes the data point point from the series.

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

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

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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.

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

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

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

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Replaces the current points with the points specified by points.

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Marks all points in the series as selected,

This function was introduced in Qt 6.2.

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Marks point at index as selected.

This function was introduced in Qt 6.2.

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Marks multiple points passed in a indexes list as selected.

This function was introduced in Qt 6.2.

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

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

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

This function was introduced in Qt 6.2.

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

This function was introduced in Qt 6.2.

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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.

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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.

This function was introduced in Qt 6.2.

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

The default size is 15.0.

This function was introduced in Qt 6.2.

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

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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 keys and QVariant values. For example:

QLineSeries *series = new QLineSeries();
series->setName("Customized serie");
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::LabelVisibility);
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 red and visibly bigger than the others with a look derived from series. By default, points don't have labels, but the point at index 4 has the label thanks to the QXYSeries::PointConfiguration::LabelVisibility configuration value. Below is an example of a chart created in this way:

This function was introduced in Qt 6.2.

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

This function was introduced in Qt 6.2.

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

This function was introduced in Qt 6.2.

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

This function was introduced in Qt 6.2.

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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.

This function was introduced in Qt 6.2.

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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.

This function was introduced in Qt 6.2.

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

This function was introduced in Qt 6.2.

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Stream operator for adding the data point point to the series.

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Stream operator for adding the list of data points specified by points to the series.

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QList<QPointF> QXYSeries::pointsVector() const▲