The QAreaSeries class presents data in area charts. 更多...
头: | #include <QAreaSeries> |
实例化: | AreaSeries |
继承: | QAbstractSeries |
|
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QAreaSeries (QLineSeries * upperSeries , QLineSeries * lowerSeries = nullptr) | |
QAreaSeries (QObject * parent = nullptr) | |
virtual | ~QAreaSeries () |
QColor | borderColor () const |
QBrush | brush () const |
QColor | color () const |
QLineSeries * | lowerSeries () const |
QPen | pen () const |
bool | pointLabelsClipping () const |
QColor | pointLabelsColor () const |
QFont | pointLabelsFont () const |
QString | pointLabelsFormat () const |
bool | pointLabelsVisible () const |
bool | pointsVisible () const |
void | setBorderColor (const QColor & color ) |
void | setBrush (const QBrush & brush ) |
void | setColor (const QColor & color ) |
void | setLowerSeries (QLineSeries * series ) |
void | setPen (const QPen & pen ) |
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 | setPointsVisible (bool visible = true) |
void | setUpperSeries (QLineSeries * series ) |
QLineSeries * | upperSeries () const |
virtual QAbstractSeries::SeriesType | type () const override |
void | borderColorChanged (QColor color ) |
void | clicked (const QPointF & point ) |
void | colorChanged (QColor color ) |
void | doubleClicked (const QPointF & point ) |
void | hovered (const QPointF & point , bool state ) |
void | pointLabelsClippingChanged (bool clipping ) |
void | pointLabelsColorChanged (const QColor & color ) |
void | pointLabelsFontChanged (const QFont & font ) |
void | pointLabelsFormatChanged (const QString & format ) |
void | pointLabelsVisibilityChanged (bool visible ) |
void | pressed (const QPointF & point ) |
void | released (const QPointF & point ) |
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. Since the area series is based on the line series, the QAreaSeries constructor needs a QLineSeries instance, which 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, QAreaSeries should be initialized with two QLineSeries 实例。
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.
见 area chart example to learn how to create a simple area chart.
This property holds the line (pen) color of the series. This is a convenience property for modifying the color of the pen.
访问函数:
QColor | borderColor () const |
void | setBorderColor (const QColor & color ) |
通知程序信号:
void | borderColorChanged (QColor color ) |
另请参阅 QAreaSeries::pen ().
This property holds the fill (brush) color of the series. This is a convenience property for modifying the color of the brush.
访问函数:
QColor | color () const |
void | setColor (const QColor & color ) |
通知程序信号:
void | colorChanged (QColor color ) |
另请参阅 QAreaSeries::brush ().
This property holds the lower one of the two line series used to define area series boundaries.
注意: 若 QAreaSeries was constructed without a lowerSeries, this is null.
访问函数:
QLineSeries * | lowerSeries () const |
This property holds the clipping for data point labels. 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 .
This property holds the color used for data point labels. By default, the color is the color of the brush defined for labels in the theme.
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 QAreaSeries::pointLabelsFormat .
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 QAreaSeries::pointLabelsFormat .
This property holds the format used for showing labels with series points.
QAreaSeries supports the following format tags:
@xPoint | The x value of the data point |
@yPoint | The y value of the data point |
For example, the following usage of the format tags would produce labels that have the data point (x, y) shown inside brackets separated by a comma:
series->setPointLabelsFormat("(@xPoint, @yPoint)");
By default, the label format is set to
@xPoint, @yPoint
. The labels are shown on the plot area, whereas 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 QAreaSeries::pointLabelsVisible , QAreaSeries::pointLabelsFont ,和 QAreaSeries::pointLabelsColor .
This property holds the visibility of data point labels. False by default.
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 QAreaSeries::pointLabelsFormat and QAreaSeries::pointLabelsClipping .
This property holds the upper one of the two line series used to define area series boundaries.
访问函数:
QLineSeries * | upperSeries () const |
Constructs an area series object that will be spanned between an upperSeries line and a lowerSeries line. If no lowerSeries is passed to the constructor, the x-axis is used as the lower bound instead.
The QAreaSeries does not own the upper or lower series, but the ownership stays with the caller. When the series object is added to QChartView or QChart , the instance ownership is transferred.
Constructs an area series object without an upper or a lower series with the parent 对象。
[signal]
void
QAreaSeries::
borderColorChanged
(
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 borderColor .
[signal]
void
QAreaSeries::
clicked
(const
QPointF
&
point
)
This signal is emitted when the user triggers a press on point by clicking it in an area chart.
另请参阅 pressed , released ,和 doubleClicked .
[signal]
void
QAreaSeries::
colorChanged
(
QColor
color
)
This signal is emitted when the fill (brush) color changes to color .
注意: 通知程序信号对于特性 color .
[signal]
void
QAreaSeries::
doubleClicked
(const
QPointF
&
point
)
This signal is emitted when the user triggers the first press in an area chart by doubleclicking point .
另请参阅 pressed , released ,和 clicked .
[signal]
void
QAreaSeries::
hovered
(const
QPointF
&
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.
[signal]
void
QAreaSeries::
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
QAreaSeries::
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
QAreaSeries::
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
QAreaSeries::
pointLabelsFormatChanged
(const
QString
&
format
)
此信号发射当 format of data point labels is changed.
注意: 通知程序信号对于特性 pointLabelsFormat .
[signal]
void
QAreaSeries::
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
QAreaSeries::
pressed
(const
QPointF
&
point
)
This signal is emitted when the user presses the point specified by point in an area chart.
另请参阅 clicked , released ,和 doubleClicked .
[signal]
void
QAreaSeries::
released
(const
QPointF
&
point
)
This signal is emitted when the user releases a press that was triggered on point in an area chart.
另请参阅 pressed , clicked ,和 doubleClicked .
[虚拟]
QAreaSeries::
~QAreaSeries
()
销毁对象。
Returns the brush used to draw the line for this series.
另请参阅 setBrush ().
Returns the pen used to draw the line for this series.
另请参阅 setPen ().
Returns whether the points are drawn for this series.
另请参阅 setPointsVisible ().
设置 brush used for filling the area.
另请参阅 brush ().
设置 series that is to be used as the area chart lower series.
另请参阅 lowerSeries ().
设置 pen used for drawing the area outline.
另请参阅 pen ().
Determines whether data points are visible and should be drawn on the line.
另请参阅 pointsVisible ().
设置 series that is to be used as the area chart upper series. If the upper series is null, the area chart is not drawn, even if it has a lower series.
另请参阅 upperSeries ().
[override virtual]
QAbstractSeries::SeriesType
QAreaSeries::
type
() const
重实现访问函数为特性: QAbstractSeries::type .