就业培训     下载中心     Wiki     联络 登录   注册
  1. 首页
  2. Qt 5.15.17
  3. Qt KNX
  4. C++ 类
  5. QKnx4ByteFloat

QKnx4ByteFloat Class

The QKnx4ByteFloat class is datapoint type for a 4-byte float value. 更多...

头： #include <QKnx4ByteFloat>
qmake: QT += knx
继承： QKnxFixedSizeDatapointType

公共函数

QKnx4ByteFloat (float value )
QKnx4ByteFloat ()
void setValue (float value )
float value () const

重实现公共函数

virtual bool isValid () const override

保护函数

QKnx4ByteFloat (int subType , float value )

详细描述

This is fixed size datapoint type with the length of 4 bytes.

The range for the value of this datapoint type is from -3.40282e+38 to 3.40282e+38 .

This class is a base class for the following datapoint types:

  • QKnxValueAbsoluteTemperature - Absolute temperature in K.
  • QKnxValueAcceleration - Acceleration in m/s2.
  • QKnxValueAccelerationAngular - Angular Acceleration in rad/s2.
  • QKnxValueActivationEnergy - Activation Energy in J/mol.
  • QKnxValueActivity - Radioactive activity in 1/s.
  • QKnxValueAngleDeg - Angle in degrees.
  • QKnxValueAngleRad - Angle in radian.
  • QKnxValueAmplitude - Amplitude.
  • QKnxValueAngularFrequency - Angular frequency in rad/s.
  • QKnxValueAngularMomentum - Angular momentum in Js.
  • QKnxValueAngularVelocity - Angular velocity in rad/s.
  • QKnxValueArea - Area in m2.
  • QKnxValueCapacitance - Capacitance in F.
  • QKnxValueChargeDensitySurface - Flux density in C/m2.
  • QKnxValueChargeDensityVolume - Charge density in C/m3.
  • QKnxValueCompressibility - Compressibility in m2/N.
  • QKnxValueCommonTemperature - Temperature in degrees Celsius.
  • QKnxValueConductance - Conductance in S.
  • QKnxValueDensity - Density in kg/m3.
  • QKnxValueElectricalConductivity - Conductivity in S/m.
  • QKnxValueElectricCharge - Electric charge in C.
  • QKnxValueElectricCurrent - Electric current in A.
  • QKnxValueElectricCurrentDensity - Electric current density in A/m2.
  • QKnxValueElectricDipoleMoment - Electric dipole moment in Cm.
  • QKnxValueElectricDisplacement - Electric displacement in C/m2.
  • QKnxValueElectricFieldStrength - Electric field strength in V/m.
  • QKnxValueElectricFlux - Electric flux in C.
  • QKnxValueElectricFluxDensity - Electric flux density in C/m2.
  • QKnxValueElectricPolarization - Electric polarization in C/m2.
  • QKnxValueElectricPotential - Electric potential in V.
  • QKnxValueElectricPotentialDifference - Electric potential difference in V.
  • QKnxValueElectromagneticMoment - Electromagnetic moment in Am2.
  • QKnxValueElectromotiveForce - Electromotive force in V.
  • QKnxValueEnergy - Energy in J.
  • QKnxValueForce - Force in N.
  • QKnxValueFrequency - Frequency in Hz.
  • QKnxValueHeatCapacity - Heat capacity in J/K.
  • QKnxValueHeatFlowRate - Heat flow rate in W.
  • QKnxValueHeatQuantity - Heat quantity in J.
  • QKnxValueImpedance - Impedance in Ohm.
  • QKnxValueLength - Length in m.
  • QKnxValueLightQuantity - Light quantity in J.
  • QKnxValueLuminance - Luminance in cd/m2.
  • QKnxValueLuminousFlux - Luminous flux in lm.
  • QKnxValueLuminousIntensity - Luminous intensity in cd.
  • QKnxValueMagneticFieldStrength - Magnetic field strength in A/m.
  • QKnxValueMagneticFlux - Magnetic flux in Wb.
  • QKnxValueMagneticFluxDensity - Magnetic flux density in T.
  • QKnxValueMagneticMoment - Magnetic moment in Am2.
  • QKnxValueMagneticPolarization - Magnetic polarization in T.
  • QKnxValueMagnetization - Magnetization in A/m.
  • QKnxValueMagnetomotiveForce - Magnetomotive force in A.
  • QKnxValueMass - Mass in kg.
  • QKnxValueMassFlux - Mass flux in kg/s.
  • QKnxValueMol - Amount of substance in mol.
  • QKnxValueMomentum - Momentum in N/s.
  • QKnxValuePhaseAngleDeg - Phase angle in degrees.
  • QKnxValuePhaseAngleRad - Phase angle in radian.
  • QKnxValuePower - Power in W.
  • QKnxValuePowerFactor - Power factor in cos Phi.
  • QKnxValuePressure - Pressure in Pa.
  • QKnxValueReactance - Reactance in Ohm.
  • QKnxValueResistance - Resistance in Ohm.
  • QKnxValueResistivity - Resistivity in Ohm*m.
  • QKnxValueSelfInductance - Self inductance in H.
  • QKnxValueSolidAngle - Solid angle in sr.
  • QKnxValueSoundIntensity - Sound intensity in W/m2.
  • QKnxValueSpeed - Speed in m/s.
  • QKnxValueStress - Stress in Pa.
  • QKnxValueSurfaceTension - Surface tension in N/m.
  • QKnxValueTemperatureDifference - Temperature difference in K.
  • QKnxValueThermalCapacity - Thermal capacity in J/K.
  • QKnxValueThermalConductivity - Thermal conductivity in W/mk.
  • QKnxValueThermoelectricPower - Thermoelectric power in V/K.
  • QKnxValueTime - Time in seconds.
  • QKnxValueTorque - Torque in Nm.
  • QKnxValueVolume - Volume in m3.
  • QKnxValueVolumeFlux - Volume flux in m3/s.
  • QKnxValueWeight - Weight in N.
  • QKnxValueWork - Work in J.

另请参阅 QKnxDatapointType and Qt KNX Datapoint Type Classes .

成员函数文档编制

[protected] QKnx4ByteFloat:: QKnx4ByteFloat ( int subType , float value )

Creates a fixed size datapoint type with the subtype subType and float value .

QKnx4ByteFloat:: QKnx4ByteFloat ( float value )

Creates a fixed size datapoint type with the float value .

QKnx4ByteFloat:: QKnx4ByteFloat ()

Creates a fixed size datapoint type with the value set to 0.0 .

[override virtual] bool QKnx4ByteFloat:: isValid () const

重实现： QKnxDatapointType::isValid () const.

void QKnx4ByteFloat:: setValue ( float value )

Sets the float of the datapoint type to value .

If the value is outside the allowed range, returns false and does not set the value.

另请参阅 value ().

float QKnx4ByteFloat:: value () const

Returns the value stored in the datapoint type.

另请参阅 setValue ().

内容