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  2. Qt 6.7.2
  3. Qt Charts
  4. QML 类型
  5. AreaSeries

AreaSeries QML Type

Presents data in area charts. 更多...

import 语句： import QtCharts 2.7
实例化： QAreaSeries
继承：

AbstractSeries

特性

信号

详细描述

An area series is used to show quantitative data. It is based on a line series, in the way that the area between the boundary lines is emphasized with color. The LineSeries type defines the upper boundary of the area. The area chart is drawn using the bottom of the plot area as the lower boundary by default. Instead of the bottom of the plot area, the lower boundary can be specified by another line. In that case, the AreaSeries should use two LineSeries 类型。

注意： The terms upper and lower boundary can be misleading in cases where the value of the lower boundary is greater than that of the upper boundary. The main point is that the area between these two boundary lines will be filled.

The following QML shows how to create a simple area chart: 

ChartView {
    title: "NHL All-Star Team Players"
    anchors.fill: parent
    antialiasing: true
    // Define x-axis to be used with the series instead of default one
    ValueAxis {
        id: valueAxis
        min: 2000
        max: 2011
        tickCount: 12
        labelFormat: "%.0f"
    }
    AreaSeries {
        name: "Russian"
        axisX: valueAxis
        upperSeries: LineSeries {
            XYPoint { x: 2000; y: 1 }
            XYPoint { x: 2001; y: 1 }
            XYPoint { x: 2002; y: 1 }
            XYPoint { x: 2003; y: 1 }
            XYPoint { x: 2004; y: 1 }
            XYPoint { x: 2005; y: 0 }
            XYPoint { x: 2006; y: 1 }
            XYPoint { x: 2007; y: 1 }
            XYPoint { x: 2008; y: 4 }
            XYPoint { x: 2009; y: 3 }
            XYPoint { x: 2010; y: 2 }
            XYPoint { x: 2011; y: 1 }
        }
    }

注意： Adding the same line series to a chart and area series is not supported. The series used as boundary lines should be defined only for the area series.

特性文档编制

axisAngular : AbstractAxis

The angular axis used for the series, drawn around the polar chart view.

另请参阅 axisX and PolarChartView .

axisRadial : AbstractAxis

The radial axis used for the series, drawn inside the polar chart view.

另请参阅 axisY and PolarChartView .

axisX : AbstractAxis

The x-axis used for the series. If you leave both axisX and axisXTop undefined, a value axis is created for the series.

另请参阅 axisXTop and ValueAxis .

axisXTop : AbstractAxis

The x-axis used for the series, drawn on top of the chart view.

注意： You can only provide either axisX or axisXTop, not both.

另请参阅 axisX .

axisY : AbstractAxis

The y-axis used for the series. If you leave both axisY and axisYRight undefined, a value axis is created for the series.

另请参阅 axisYRight and ValueAxis .

axisYRight : AbstractAxis

The y-axis used for the series, drawn to the right on the chart view.

注意： You can only provide either axisY or axisYRight, not both.

另请参阅 axisY .

borderColor : color

Line (pen) color of the series.

borderWidth : real

The width of the border line. By default, the width is 2.0.

brush : brush

The brush used to draw to draw the line for this series.

brushFilename : QString

The name of the file used as a brush image for the series.

color : color

Fill (brush) color of the series.

lowerSeries : LineSeries [read-only]

The lower one of the two line series used to define area series boundaries.

注意： 若 AreaSeries was constructed without a lowerSeries, this is null.

pointLabelsClipping : bool

Defines the clipping for data point labels. True by default. The labels on the edge of the plot area are cut when clipping is enabled.

另请参阅 pointLabelsVisible .

pointLabelsColor : font

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

另请参阅 pointLabelsFormat .

pointLabelsFont : font

Defines the font used for data point labels.

另请参阅 pointLabelsFormat .

pointLabelsFormat : string

The format used for showing labels with series points.

另请参阅 QAreaSeries::pointLabelsFormat , pointLabelsVisible , pointLabelsFont ，和 pointLabelsColor .

pointLabelsVisible : bool

Defines the visibility of data point labels.

另请参阅 pointLabelsFormat and pointLabelsClipping .

upperSeries : LineSeries [read-only]

The upper one of the two line series used to define area series boundaries.

信号文档编制

clicked ( point point )

This signal is emitted when the user triggers a press on point by clicking it in an area chart.

The corresponding signal handler is onClicked .

注意： 相应处理程序是 onClicked .

另请参阅 pressed , released ，和 doubleClicked .

doubleClicked ( point point )

This signal is emitted when the user triggers the first press in an area chart by doubleclicking point .

The corresponding signal handler is onDoubleClicked .

注意： 相应处理程序是 onDoubleClicked .

另请参阅 pressed , released ，和 clicked .

hovered ( point point , bool state )

This signal is emitted when the user hovers the mouse cursor over a series or moves it away from the series. point shows the origin (coordinate) of the hover event. state is true when the cursor hovers over the series and turns false when it moves away from the series.

The corresponding signal handler is onHovered .

注意： 相应处理程序是 onHovered .

pressed ( point point )

This signal is emitted when the user presses the point specified by point in an area chart.

The corresponding signal handler is onPressed .

注意： 相应处理程序是 onPressed .

另请参阅 clicked , released ，和 doubleClicked .

released ( point point )

This signal is emitted when the user releases a press that was triggered on point in an area chart.

The corresponding signal handler is onReleased .

注意： 相应处理程序是 onReleased .

另请参阅 pressed , clicked ，和 doubleClicked .

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