Adds values to a chart's axes. 更多...
import 语句: | import QtCharts 2.15 |
实例化: | QValueAxis |
继承: |
The ValueAxis type can be set up to show an axis line with tick marks, grid lines, and shades. The values on the axis are drawn at the positions of tick marks.
The following example code illustrates how to use the ValueAxis type:
ChartView { ValueAxis { id: xAxis min: 0 max: 10 } // Add a few series... }
labelFormat : string |
格式字符串支持的以下转换说明符、长度修饰符和标志的提供通过
printf()
在标准 C++ 库:d、i、o、x、X、f、F、e、E、g、G、c。
若
ChartView.localizeNumbers
is
true
,支持的说明符限于:d、e、E、f、g、G 和 i。另外,仅支持精度修饰符。其余格式来自默认
QLocale
对于应用程序。
另请参阅 QString::asprintf() .
max : real |
The maximum value on the axis.
When setting this property, the minimum value is adjusted if necessary, to ensure that the range remains valid.
min : real |
The minimum value on the axis.
When setting this property, the maximum value is adjusted if necessary, to ensure that the range remains valid.
minorTickCount : int |
The number of minor tick marks on the axis. This indicates how many grid lines are drawn between major ticks on the chart. Labels are not drawn for minor ticks. The default value is 0.
tickAnchor : real |
The base value where the dynamically placed tick marks and labels are started from.
This property was introduced in QtCharts 2.3.
tickCount : int |
The number of tick marks on the axis. This indicates how many grid lines are drawn on the chart. The default value is 5, and the number cannot be less than 2.
tickInterval : real |
The interval between dynamically placed tick marks and labels.
This property was introduced in QtCharts 2.3.
tickType : enumeration |
The positioning method of tick and labels.
常量 | 描述 |
---|---|
ValueAxis.TicksDynamic
|
Ticks are placed according to tickAnchor and tickInterval 值。 |
ValueAxis.TicksFixed
|
Ticks are placed evenly across the axis range. The tickCount value specifies the number of ticks. |
This property was introduced in QtCharts 2.3.
此信号发射当 min or max value of the axis changes.
The corresponding signal handler is
onRangeChanged
.
注意:
相应处理程序是
onRangeChanged
.
修改轴的当前范围和刻度标记数,以使看起来 nice . The algorithm considers numbers that can be expressed as a form of 1*10^n, 2* 10^n, or 5*10^n to be nice numbers. These numbers are used for setting spacing for the tick marks.