The QSystemBatteryInfo class provides access to battery and power information from the system. More...
#include <QSystemBatteryInfo>
Inherits QObject.
enum | BatteryStatus { BatteryStatus, BatteryEmpty, BatteryCritical, BatteryVeryLow, ..., BatteryFull } |
enum | ChargerType { UnknownCharger, NoCharger, WallCharger, USBCharger, ..., VariableCurrentCharger } |
enum | ChargingState { NotCharging, Charging, ChargingError } |
enum | EnergyUnit { UnitmAh, UnitmWh } |
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QSystemBatteryInfo ( QObject * parent = 0 ) | |
~QSystemBatteryInfo () | |
QSystemBatteryInfo::BatteryStatus | batteryStatus () const |
QSystemBatteryInfo::ChargerType | chargerType () const |
QSystemBatteryInfo::ChargingState | chargingState () const |
int | currentFlow () const |
QSystemBatteryInfo::EnergyUnit | energyMeasurementUnit () const |
int | maxBars () const |
int | nominalCapacity () const |
int | remainingCapacity () const |
int | remainingCapacityBars () const |
int | remainingCapacityPercent () const |
int | remainingChargingTime () const |
int | startCurrentMeasurement ( int rate ) |
int | voltage () const |
void | batteryStatusChanged ( QSystemBatteryInfo::BatteryStatus batteryStatus ) |
void | chargerTypeChanged ( QSystemBatteryInfo::ChargerType chargerType ) |
void | chargingStateChanged ( QSystemBatteryInfo::ChargingState chargingState ) |
void | currentFlowChanged ( int level ) |
void | nominalCapacityChanged ( int level ) |
void | remainingCapacityBarsChanged ( int level ) |
void | remainingCapacityChanged ( int level ) |
void | remainingCapacityPercentChanged ( int level ) |
void | remainingChargingTimeChanged ( int level ) |
void | voltageChanged ( int level ) |
The QSystemBatteryInfo class provides access to battery and power information from the system.
This enum describes the status of the main battery.
Constant | Value | Description |
---|---|---|
QSystemBatteryInfo::BatteryStatus | ? | Battery level undetermined. |
QSystemBatteryInfo::BatteryEmpty | 0 | Battery level reported as 0, system will shutdown. |
QSystemBatteryInfo::BatteryCritical | 1 | Battery level is critical 3% or less. |
QSystemBatteryInfo::BatteryVeryLow | 2 | Battery level is very low, 10% or less. |
QSystemBatteryInfo::BatteryLow | 3 | Battery level is low 40% or less. |
QSystemBatteryInfo::BatteryOk | 4 | Battery level is above 40%. |
QSystemBatteryInfo::BatteryFull | 5 | Battery level is 100%. |
This enum describes the type of charger used.
Constant | Value | Description |
---|---|---|
QSystemBatteryInfo::UnknownCharger | -1 | Charger type unknown, or error. |
QSystemBatteryInfo::NoCharger | 0 | No charger. |
QSystemBatteryInfo::WallCharger | 1 | Using wall (mains) charger. |
QSystemBatteryInfo::USBCharger | 2 | Using USB charger when the system cannot differentiate the current. |
QSystemBatteryInfo::USB_500mACharger | 3 | Using USB charger at 500 mA. |
QSystemBatteryInfo::USB_100mACharger | 4 | Using USB charger at 100 mA. |
QSystemBatteryInfo::VariableCurrentCharger | 5 | Using variable current charger such as bicycle or solar. |
This enum describes the charging state:
Constant | Value | Description |
---|---|---|
QSystemBatteryInfo::NotCharging | 0 | Battery is not charging. |
QSystemBatteryInfo::Charging | 1 | Battery is charging. |
QSystemBatteryInfo::ChargingError | -1 | Error. |
This enum describes the energy unit used by the system.
Constant | Value | Description |
---|---|---|
QSystemBatteryInfo::UnitmAh | 0 | Energy described in milli Amp hours (mAh) |
QSystemBatteryInfo::UnitmWh | 1 | Energy described in milli watt hours (mWh) |
This property holds the battery status.
Returns the battery charge status.
Access functions:
QSystemBatteryInfo::BatteryStatus | batteryStatus () const |
Notifier signal:
void | batteryStatusChanged ( QSystemBatteryInfo::BatteryStatus batteryStatus ) |
Access functions:
QSystemBatteryInfo::ChargerType | chargerType () const |
Notifier signal:
void | chargerTypeChanged ( QSystemBatteryInfo::ChargerType chargerType ) |
Access functions:
QSystemBatteryInfo::ChargingState | chargingState () const |
Notifier signal:
void | chargingStateChanged ( QSystemBatteryInfo::ChargingState chargingState ) |
This property holds the battery current flow.
Returns the amount of current flowing out from the battery (a short term averge), milliapmeres (mA). Positive current means discharging and negative current means charging.
Access functions:
int | currentFlow () const |
Notifier signal:
void | currentFlowChanged ( int level ) |
Access functions:
QSystemBatteryInfo::EnergyUnit | energyMeasurementUnit () const |
This property holds the maximum number of bars the system uses.
Returns the Maximum number of bars the system uses.
Access functions:
int | maxBars () const |
This property holds the nominal battery capacity.
Returns the nominal (maximum) capacity of the battery, in milliampere-hours (mAh).
Access functions:
int | nominalCapacity () const |
Notifier signal:
void | nominalCapacityChanged ( int level ) |
This property holds the battery level in QSystemBatteryInfo::EnergyUnit.
Returns the remaining battery level of the battery in QSystemBatteryInfo::EnergyUnit.
Access functions:
int | remainingCapacity () const |
Notifier signal:
void | remainingCapacityChanged ( int level ) |
See also QSystemBatteryInfo::energyMeasurementUnit().
This property holds the remaining capacity in number of bars.
Returns the remaining capacity in number of bars. The bar count will not necessarily always reflect one to one on the remaining capacity percentage.
Access functions:
int | remainingCapacityBars () const |
Notifier signal:
void | remainingCapacityBarsChanged ( int level ) |
This property holds the battery level in percent.
Returns the remaining battery level of the battery in percent.
Access functions:
int | remainingCapacityPercent () const |
Notifier signal:
void | remainingCapacityPercentChanged ( int level ) |
This property holds the remaining time of charging.
Returns the remaining time of charging in seconds if charging, or -1 if not charging.
Access functions:
int | remainingChargingTime () const |
Notifier signal:
void | remainingChargingTimeChanged ( int level ) |
This property holds the battery voltage.
Returns the voltage of the battery, in millivolts (mV).
Access functions:
int | voltage () const |
Constructs a QSystemBatteryInfo object with the given parent.
Destroys the QSystemBatteryInfo object.
This signal is emitted when the charger type has changed, such as when a phone gets plugged in to the wall, or usb. chargerType is the new charger type.
This signal is emitted when charging state has changed. chargingState is the new chargingState.
This signal is emitted when the short term averge battery current has changed. Sent at desired interval when battery current measurement is enabled .
level is the new level.
See also QSystemBatteryInfo::startCurrentMeasurement.
This signal is emitted when nominal (maximum) battery level has changed. level is the new level.
This signal is emitted when battery level has changed. level is the new level.
This signal is emitted when battery capacity has changed, reported in QSystemBatteryInfo::EnergyUnit. level is the new level.
This signal is emitted when battery capacity in percent has changed. level is the new level.
This signal is emitted when remianing charge time has changed. level is the new level.
Starts battery current measurement with given rate. Return value is actual rate used by the system.
This signal is emitted when battery voltage level has changed, in millivolts (mV). level is the new level.