Use VeQuickItem::numberValue to reduce binding overheads

components/AcPhase.qml

@@ -10,10 +10,10 @@ QtObject {
 	id: root
 
 	property string serviceUid
-	readonly property real frequency: _frequency.value === undefined ? NaN : _frequency.value
-	readonly property real current: _current.value === undefined ? NaN : _current.value
-	readonly property real voltage: _voltage.value === undefined ? NaN : _voltage.value
-	readonly property real power: _power.value === undefined ? NaN : _power.value
+	readonly property real frequency: _frequency.numberValue
+	readonly property real current: _current.numberValue
+	readonly property real voltage: _voltage.numberValue
+	readonly property real power: _power.numberValue
 	readonly property bool valid: !isNaN(frequency)
 								  && !isNaN(current)
 								  && !isNaN(voltage)

components/listitems/ListQuantityField.qml

@@ -9,7 +9,7 @@ import Victron.VenusOS
 ListTextField {
 	id: root
 
-	property real value: dataItem.isValid ? dataItem.value : NaN
+	property real value: dataItem.numberValue
 	property int unit: VenusOS.Units_None
 	property int decimals: Units.defaultUnitPrecision(unit)
 

components/listitems/ListQuantityItem.qml

@@ -20,7 +20,7 @@ ListItem {
 
 			anchors.verticalCenter: parent.verticalCenter
 			font.pixelSize: Theme.font_size_body2
-			value: dataItem.value === undefined ? NaN : dataItem.value
+			value: dataItem.numberValue
 		}
 	]
 

data/DcInputs.qml

@@ -11,7 +11,7 @@ QtObject {
 
 	property real power: NaN
 	property real current: NaN
-	readonly property real maximumPower: _maximumPower.value === undefined ? NaN : _maximumPower.value
+	readonly property real maximumPower: _maximumPower.numberValue
 
 	property DeviceModel model: DeviceModel {
 		modelId: "dcInputs"

data/System.qml

@@ -28,8 +28,8 @@ QtObject {
 	property QtObject solar: QtObject {
 		readonly property real power: Units.sumRealNumbers(acPower, dcPower)
 		property real acPower: _pvMonitor.totalPower
-		property real dcPower: _dcPvPower.value === undefined ? NaN : _dcPvPower.value
-		readonly property real maximumPower: _maximumPower.value === undefined ? NaN : _maximumPower.value
+		property real dcPower: _dcPvPower.numberValue
+		readonly property real maximumPower: _maximumPower.numberValue
 
 		// In cases where the overall current cannot be determined, the value is NaN.
 		readonly property real current: {
@@ -46,7 +46,7 @@ QtObject {
 				}
 				return _pvMonitor.totalCurrent
 			} else if (Global.solarChargers.model.count > 0) {
-				return _dcPvCurrent.value === undefined ? NaN : _dcPvCurrent.value
+				return _dcPvCurrent.numberValue
 			}
 			return NaN
 		}
@@ -71,7 +71,7 @@ QtObject {
 
 	readonly property QtObject veBus: QtObject {
 		readonly property string serviceUid: BackendConnection.serviceUidFromName(_serviceName.value || "", _deviceInstance.value || 0)
-		readonly property real power: _power.value === undefined ? NaN : _power.value
+		readonly property real power: _power.numberValue
 
 		readonly property VeQuickItem _serviceName: VeQuickItem { uid: root.serviceUid + "/VebusService" }
 		readonly property VeQuickItem _deviceInstance: VeQuickItem { uid: root.serviceUid + "/VebusInstance" }

data/SystemAc.qml

@@ -12,7 +12,7 @@ QtObject {
 	property QtObject consumption: QtObject {
 		property real power: NaN
 		readonly property real current: phases.count === 1 ? _firstPhaseCurrent : NaN // multi-phase systems don't have a total current
-		readonly property real maximumCurrent: _maximumCurrent.value === undefined ? NaN : _maximumCurrent.value
+		readonly property real maximumCurrent: _maximumCurrent.numberValue
 		property real _firstPhaseCurrent: NaN
 
 		property ListModel phases: ListModel {}

data/SystemDc.qml

@@ -12,7 +12,7 @@ QtObject {
 	property real power: NaN
 	readonly property real current: (isNaN(power) || isNaN(voltage) || voltage === 0) ? NaN : power / voltage
 	property real voltage: NaN
-	readonly property real maximumPower: _maximumDcPower.value === undefined ? NaN : _maximumDcPower.value
+	readonly property real maximumPower: _maximumDcPower.numberValue
 
 	function reset() {
 		power = NaN

data/common/AcData.qml

@@ -11,16 +11,16 @@ QtObject {
 
 	property string bindPrefix
 
-	readonly property real voltage: _voltage.value === undefined ? NaN : _voltage.value
-	readonly property real current: _current.value === undefined ? NaN : _current.value
-	readonly property real frequency: _frequency.value === undefined ? NaN : _frequency.value
+	readonly property real voltage: _voltage.numberValue
+	readonly property real current: _current.numberValue
+	readonly property real frequency: _frequency.numberValue
 
 	// If the power is not reported, calculate the apparent power
-	readonly property real power: _reportedPower.value !== undefined ? _reportedPower.value
-			 : _apparentPower.value !== undefined ? _apparentPower.value
-			 : _voltage.value !== undefined && _current.value !== undefined ? _voltage.value * _current.value
+	readonly property real power: _reportedPower.isValid ? _reportedPower.numberValue
+			 : _apparentPower.isValid ? _apparentPower.numberValue
+			 : (_voltage.isValid && _current.isValid) ? _voltage.numberValue * _current.numberValue
 			 : NaN
-	readonly property int powerUnit: _reportedPower.value !== undefined ? VenusOS.Units_Watt : VenusOS.Units_VoltAmpere
+	readonly property int powerUnit: _reportedPower.isValid ? VenusOS.Units_Watt : VenusOS.Units_VoltAmpere
 
 	property VeQuickItem _voltage: VeQuickItem {
 		uid: root.bindPrefix ? root.bindPrefix + "/V" : ""

data/common/AcInputServiceLoader.qml

@@ -58,12 +58,12 @@ Loader {
 		id: vebusComponent
 
 		QtObject {
-			readonly property real power: isNaN(_powerValue) ? NaN
+			readonly property real power: !_power.isValid ? _powerValue // Will be NaN.
 					: root._feedbackEnabled ? _powerValue
 					: _powerValue > 0 ? _powerValue // see AcInputs.clampMeasurement().
 					: 0.0
-			readonly property real currentLimit: _currentLimit.value === undefined ? NaN : _currentLimit.value
-			readonly property real _powerValue: _power.value === undefined ? NaN : _power.value
+			readonly property real currentLimit: _currentLimit.numberValue
+			readonly property real _powerValue: _power.numberValue
 
 			readonly property VeQuickItem _power: VeQuickItem {
 				uid: root.serviceUid + "/Ac/ActiveIn/P"
@@ -85,7 +85,7 @@ Loader {
 		id: multiComponent
 
 		QtObject {
-			readonly property real currentLimit: _currentLimit.value === undefined ? NaN : _currentLimit.value
+			readonly property real currentLimit: _currentLimit.numberValue
 
 			readonly property VeQuickItem _activeInput: VeQuickItem {
 				uid: root.serviceUid + "/Ac/ActiveIn/ActiveInput"
@@ -104,9 +104,11 @@ Loader {
 
 		QtObject {
 			readonly property bool _feedbackEnabled: Global.systemSettings.essFeedbackToGridEnabled
-			readonly property real power: _power.value === undefined ? NaN
-				: _feedbackEnabled ? _power.value
-				: Math.max(0, value) // See AcInputs.clampMeasurement().
+
+			readonly property real power: isNaN(_power.numberValue) ? _power.numberValue
+					: _feedbackEnabled ? _power.numberValue
+					: _power.numberValue > 0 ? _power.numberValue // See AcInputs.clampMeasurement().
+					: 0
 
 			// For these devices, there is no current limit.
 			readonly property real currentLimit: NaN

data/common/AcInputSettings.qml

@@ -12,7 +12,7 @@ QtObject {
 	property string serviceUid
 	property int inputNumber: model.index + 1
 	readonly property int inputType: isNaN(_type.value) ? -1 : _type.value
-	readonly property real currentLimit: _currentLimit.value === undefined ? -1 : _currentLimit.value
+	readonly property real currentLimit: _currentLimit.isValid ? _currentLimit.numberValue : -1
 	readonly property bool currentLimitAdjustable: _currentLimitAdjustable.value === 1
 
 	property VeQuickItem _type: VeQuickItem {

data/common/AcInputSystemInfo.qml

@@ -16,16 +16,18 @@ QtObject {
 	readonly property string bindPrefix: Global.system.serviceUid + "/Ac/In/" + inputIndex
 	property bool isActiveInput
 	readonly property bool connected: _connected.value === 1
-	readonly property int deviceInstance: _deviceInstance.value === undefined ? -1 : _deviceInstance.value
+	readonly property int deviceInstance: _deviceInstance.isValid ? _deviceInstance.value : -1
 	readonly property string serviceType: _serviceType.value || "" // e.g. "vebus"
 	readonly property string serviceName: _serviceName.value || "" // e.g. com.victronenergy.vebus.ttyO, com.victronenergy.grid.ttyO
 	readonly property int source: _source.value === undefined ? VenusOS.AcInputs_InputSource_NotAvailable : _source.value
-	readonly property real minimumCurrent: _minimumCurrent.value === undefined ? NaN
-			: _feedbackEnabled ? _minimumCurrent.value
-			: Math.max(0, _minimumCurrent.value) // See AcInputs.clampMeasurement().
-	readonly property real maximumCurrent: _maximumCurrent.value === undefined ? NaN
-			: _feedbackEnabled ? _maximumCurrent.value
-			: Math.max(0, _maximumCurrent.value) // See AcInputs.clampMeasurement().
+	readonly property real minimumCurrent: !_minimumCurrent.isValid ? _minimumCurrent.numberValue // will be NaN if invalid.
+			: _feedbackEnabled ? _minimumCurrent.numberValue
+			: _minimumCurrent.numberValue > 0 ? _minimumCurrent.numberValue // See AcInputs.clampMeasurement().
+			: 0.0
+	readonly property real maximumCurrent: !_maximumCurrent.isValid ? _maximumCurrent.numberValue // will be NaN if invalid.
+			: _feedbackEnabled ? _maximumCurrent.numberValue
+			: _maximumCurrent.numberValue > 0 ? _maximumCurrent.numberValue // See AcInputs.clampMeasurement().
+			: 0.0
 
 	readonly property bool _feedbackEnabled: Global.systemSettings.essFeedbackToGridEnabled
 

data/common/Battery.qml

@@ -9,12 +9,12 @@ import Victron.VenusOS
 Device {
 	id: battery
 
-	readonly property real stateOfCharge: _stateOfCharge.value === undefined ? NaN : _stateOfCharge.value
-	readonly property real voltage: _voltage.value === undefined ? NaN : _voltage.value
-	readonly property real power: _power.value === undefined ? NaN : _power.value
-	readonly property real current: _current.value === undefined ? NaN : _current.value
-	readonly property real temperature: _temperature.value === undefined ? NaN : _temperature.value
-	readonly property real timeToGo: _timeToGo.value === undefined ? NaN : _timeToGo.value  // in seconds
+	readonly property real stateOfCharge: _stateOfCharge.numberValue
+	readonly property real voltage: _voltage.numberValue
+	readonly property real power: _power.numberValue
+	readonly property real current: _current.numberValue
+	readonly property real temperature: _temperature.numberValue
+	readonly property real timeToGo: _timeToGo.numberValue  // in seconds
 	readonly property string icon: !!Global.batteries ? Global.batteries.batteryIcon(battery) : ""
 	readonly property int mode: !!Global.batteries ? Global.batteries.batteryMode(battery) : -1
 

data/common/DcDevice.qml

@@ -9,9 +9,9 @@ import Victron.VenusOS
 Device {
 	id: dcDevice
 
-	readonly property real voltage: _voltage.value === undefined ? NaN : _voltage.value
-	readonly property real current: _current.value === undefined ? NaN : _current.value
-	readonly property real power: _power.value === undefined ? NaN : _power.value
+	readonly property real voltage: _voltage.numberValue
+	readonly property real current: _current.numberValue
+	readonly property real power: _power.numberValue
 
 	readonly property VeQuickItem _voltage: VeQuickItem {
 		uid: dcDevice.serviceUid + "/Dc/0/Voltage"

data/common/DcInput.qml

@@ -10,7 +10,7 @@ DcDevice {
 	id: input
 
 	readonly property int inputType: Global.dcInputs.inputType(serviceUid, monitorMode)
-	readonly property real temperature: _temperature.value === undefined ? NaN : _temperature.value
+	readonly property real temperature: _temperature.numberValue
 	readonly property int monitorMode: _monitorMode.value === undefined ? -1 : _monitorMode.value
 
 	property bool _completed

data/common/EnvironmentInput.qml

@@ -9,8 +9,8 @@ import Victron.VenusOS
 Device {
 	id: input
 
-	readonly property real temperature: _temperature.value === undefined ? NaN : _temperature.value
-	readonly property real humidity: _humidity.value === undefined ? NaN : _humidity.value
+	readonly property real temperature: _temperature.numberValue
+	readonly property real humidity: _humidity.numberValue
 	readonly property int temperatureType: _temperatureType.value === undefined ? -1 : _temperatureType.value
 
 	readonly property VeQuickItem _temperature: VeQuickItem {

data/common/EvCharger.qml

@@ -14,23 +14,16 @@ Device {
 	readonly property bool connected: _connected.value === 1
 	readonly property int chargingTime: _chargingTime.value || 0
 
-	readonly property real energy: _energy.value === undefined ? NaN : _energy.value
-	readonly property real power: _power.value === undefined ? NaN : _power.value
-	readonly property real current: _current.value === undefined ? NaN : _current.value
-	readonly property real maxCurrent: _maxCurrent.value === undefined ? NaN : _maxCurrent.value
+	readonly property real energy: _energy.numberValue
+	readonly property real power: _power.numberValue
+	readonly property real current: _current.numberValue
+	readonly property real maxCurrent: _maxCurrent.numberValue
 
 	readonly property ListModel phases: ListModel {
-		function setPower(index, value) {
-			if (index >= 0 && index < count) {
-				setProperty(index, "power", value === undefined ? NaN : value)
-			}
-		}
-
 		Component.onCompleted: {
 			const properties = [_phase1Power, _phase2Power, _phase3Power]
 			for (let i = 0; i < properties.length; ++i) {
-				const v = properties[i].value
-				append({ name: "L" + (i + 1), power: v === undefined ? NaN : v })
+				append({ name: "L" + (i + 1), power: properties[i].numberValue })
 			}
 		}
 	}
@@ -41,15 +34,15 @@ Device {
 
 	readonly property VeQuickItem _phase1Power: VeQuickItem {
 		uid: evCharger.serviceUid + "/Ac/L1/Power"
-		onValueChanged: phases.setPower(0, value)
+		onValueChanged: if (phases.count > 0) phases.setProperty(0, "power", numberValue)
 	}
 	readonly property VeQuickItem _phase2Power: VeQuickItem {
 		uid: evCharger.serviceUid + "/Ac/L2/Power"
-		onValueChanged: phases.setPower(1, value)
+		onValueChanged: if (phases.count > 1) phases.setProperty(1, "power", numberValue)
 	}
 	readonly property VeQuickItem _phase3Power: VeQuickItem {
 		uid: evCharger.serviceUid + "/Ac/L3/Power"
-		onValueChanged: phases.setPower(2, value)
+		onValueChanged: if (phases.count > 2) phases.setProperty(2, "power", numberValue)
 	}
 
 	readonly property VeQuickItem _power: VeQuickItem {

data/common/InverterCharger.qml

@@ -12,7 +12,7 @@ Device {
 	readonly property int state: _state.value === undefined ? -1 : _state.value
 	readonly property int mode: _mode.value === undefined ? -1 : _mode.value
 	readonly property bool modeAdjustable: _modeAdjustable.value !== undefined && _modeAdjustable.value > 0
-	readonly property real nominalInverterPower: _nominalInverterPower.value === undefined ? NaN : _nominalInverterPower.value
+	readonly property real nominalInverterPower: _nominalInverterPower.numberValue
 
 	readonly property int numberOfAcInputs: _numberOfAcInputs.value === undefined ? NaN : _numberOfAcInputs.value
 	readonly property bool hasPassthroughSupport: _hasPassthroughSupport.value === 1

data/common/MeteoDevice.qml

@@ -9,7 +9,7 @@ import Victron.VenusOS
 Device {
 	id: meteoDevice
 
-	readonly property real irradiance: _irradiance.value === undefined ? NaN : _irradiance.value
+	readonly property real irradiance: _irradiance.numberValue
 
 	readonly property VeQuickItem _irradiance: VeQuickItem {
 		uid: meteoDevice.serviceUid + "/Irradiance"

data/common/MotorDrive.qml

@@ -9,7 +9,7 @@ import Victron.VenusOS
 Device {
 	id: motorDrive
 
-	readonly property real motorRpm: _motorRpm.value === undefined ? NaN : _motorRpm.value
+	readonly property real motorRpm: _motorRpm.numberValue
 
 	readonly property VeQuickItem _motorRpm: VeQuickItem {
 		uid: motorDrive.serviceUid + "/Motor/RPM"

data/common/PvInverter.qml

@@ -12,10 +12,10 @@ Device {
 	readonly property int statusCode: _statusCode.value === undefined ? -1 : _statusCode.value
 	readonly property int errorCode: _errorCode.value === undefined ? -1 : _errorCode.value
 
-	readonly property real energy: _energy.value === undefined ? NaN : _energy.value
-	readonly property real current: phases.count === 1 && _current.value !== undefined ? _current.value : NaN // multi-phase systems don't have a total current
-	readonly property real power: _power.value === undefined ? NaN : _power.value
-	readonly property real voltage: _voltage.value === undefined ? NaN : _voltage.value
+	readonly property real energy: _energy.numberValue
+	readonly property real current: phases.count === 1 ? _current.numberValue : NaN // multi-phase systems don't have a total current
+	readonly property real power: _power.numberValue
+	readonly property real voltage: _voltage.numberValue
 
 	readonly property ListModel phases: ListModel {
 		function setPhaseProperty(phaseName, propertyName, value) {

data/common/SolarCharger.qml

@@ -12,12 +12,12 @@ Device {
 	readonly property int state: _state.value === undefined ? -1 : _state.value
 	readonly property int errorCode: _errorCode.value === undefined ? -1 : _errorCode.value
 	readonly property ListModel trackers: ListModel {}
-	readonly property real power: _totalPower.value === undefined ? NaN : _totalPower.value
+	readonly property real power: _totalPower.numberValue
 	readonly property alias history: _history
 
-	readonly property real batteryVoltage: _batteryVoltage.value == undefined ? NaN : _batteryVoltage.value
-	readonly property real batteryCurrent: _batteryCurrent.value == undefined ? NaN : _batteryCurrent.value
-	readonly property real batteryTemperature: _batteryTemperature.value == undefined ? NaN : _batteryTemperature.value
+	readonly property real batteryVoltage: _batteryVoltage.numberValue
+	readonly property real batteryCurrent: _batteryCurrent.numberValue
+	readonly property real batteryTemperature: _batteryTemperature.numberValue
 
 	readonly property bool relayValid: _relay.value !== undefined
 	readonly property bool relayOn: _relay.value === 1

data/common/SolarDailyHistory.qml

@@ -13,17 +13,17 @@ QtObject {
 	// Prefix is: com.victronenergy.solarcharger.tty0/History/Daily/<day>
 	property string uidPrefix
 
-	readonly property real yieldKwh: _yieldKwh.value == undefined ? NaN : _yieldKwh.value
-	readonly property real maxPower: _maxPower.value == undefined ? NaN : _maxPower.value
-	readonly property real maxPvVoltage: _maxPvVoltage.value == undefined ? NaN : _maxPvVoltage.value
+	readonly property real yieldKwh: _yieldKwh.numberValue
+	readonly property real maxPower: _maxPower.numberValue
+	readonly property real maxPvVoltage: _maxPvVoltage.numberValue
 
-	readonly property real timeInFloat: _timeInFloat.value == undefined ? NaN : _timeInFloat.value
-	readonly property real timeInAbsorption: _timeInAbsorption.value == undefined ? NaN : _timeInAbsorption.value
-	readonly property real timeInBulk: _timeInBulk.value == undefined ? NaN : _timeInBulk.value
+	readonly property real timeInFloat: _timeInFloat.numberValue
+	readonly property real timeInAbsorption: _timeInAbsorption.numberValue
+	readonly property real timeInBulk: _timeInBulk.numberValue
 
-	readonly property real minBatteryVoltage: _minBatteryVoltage.value == undefined ? NaN : _minBatteryVoltage.value
-	readonly property real maxBatteryVoltage: _maxBatteryVoltage.value == undefined ? NaN : _maxBatteryVoltage.value
-	readonly property real maxBatteryCurrent: _maxBatteryCurrent.value == undefined ? NaN : _maxBatteryCurrent.value
+	readonly property real minBatteryVoltage: _minBatteryVoltage.numberValue
+	readonly property real maxBatteryVoltage: _maxBatteryVoltage.numberValue
+	readonly property real maxBatteryCurrent: _maxBatteryCurrent.numberValue
 
 	property SolarHistoryErrorModel errorModel: SolarHistoryErrorModel {
 		uidPrefix: root.uidPrefix