QLogValue3DAxisFormatter Class
The QLogValue3DAxisFormatter class provides formatting rules for a logarithmic value axis. 更多...
| 头文件: | #include <QLogValue3DAxisFormatter> |
| 开始支持版本: | QtDataVisualization 1.1 |
| Instantiated By: | LogValueAxis3DFormatter |
| 基类: | QValue3DAxisFormatter |
属性
- autoSubGrid : bool
- base : qreal
- showEdgeLabels : bool
- 1 个属性继承自 QObject
公有函数
| QLogValue3DAxisFormatter(QObject *parent = Q_NULLPTR) | |
| virtual | ~QLogValue3DAxisFormatter() |
| bool | autoSubGrid() const |
| qreal | base() const |
| void | setAutoSubGrid(bool enabled) |
| void | setBase(qreal base) |
| void | setShowEdgeLabels(bool enabled) |
| bool | showEdgeLabels() const |
- 32 个公有函数继承自 QObject
信号
| void | autoSubGridChanged(bool enabled) |
| void | baseChanged(qreal base) |
| void | showEdgeLabelsChanged(bool enabled) |
- 2 个信号继承自 QObject
其他继承的成员
- 1 个公有槽函数继承自 QObject
- 1 个公有变量继承自 QObject
- 10 个静态公有成员继承自 QObject
- 18 个受保护的函数继承自 QValue3DAxisFormatter
- 9 个受保护的函数继承自 QObject
- 2 个受保护的变量继承自 QObject
详细描述
The QLogValue3DAxisFormatter class provides formatting rules for a logarithmic value axis.
When a formatter is attached to a value axis, the axis range cannot include negative values or the zero.
属性
autoSubGrid : bool
This property holds whether sub-grid positions are generated automatically.
If this property value is set to true, the parent axis sub-segment count is ignored when calculating sub-grid line positions. The sub-grid positions are generated automatically according to the base property value. The number of sub-grid lines is set to the base value minus one, rounded down. This property is ignored when the base value is zero. Defaults to true.
访问函数:
| bool | autoSubGrid() const |
| void | setAutoSubGrid(bool enabled) |
Notifier signal:
| void | autoSubGridChanged(bool enabled) |
参见 base and QValue3DAxis::subSegmentCount.
base : qreal
This property holds the base of the logarithm used to map axis values.
If the base is non-zero, the parent axis segment count will be ignored when the grid line and label positions are calculated. If you want the range to be divided into equal segments like a normal value axis, set this property value to zero.
The base has to be zero or a positive value and it cannot be equal to one. Defaults to ten.
访问函数:
| qreal | base() const |
| void | setBase(qreal base) |
Notifier signal:
| void | baseChanged(qreal base) |
参见 QValue3DAxis::segmentCount.
showEdgeLabels : bool
This property holds whether the first and last label on the axis are visible.
When the base property value is non-zero, the whole axis range is often not equally divided into segments. The first and last segments are often smaller than the other segments. In extreme cases, this can lead to overlapping labels on the first and last two grid lines. By setting this property to false, you can suppress showing the minimum and maximum labels for the axis in cases where the segments do not exactly fit the axis. Defaults to true.
访问函数:
| bool | showEdgeLabels() const |
| void | setShowEdgeLabels(bool enabled) |
Notifier signal:
| void | showEdgeLabelsChanged(bool enabled) |
参见 base and QAbstract3DAxis::labels.
成员函数
QLogValue3DAxisFormatter::QLogValue3DAxisFormatter(QObject *parent = Q_NULLPTR)
Constructs a new logarithmic value 3D axis formatter with the optional parent parent.
[virtual] QLogValue3DAxisFormatter::~QLogValue3DAxisFormatter()
Deletes the logarithmic value 3D axis formatter.