Class: QgsFieldCalculator

class qgis.gui.QgsFieldCalculator

Bases: PyQt5.QtWidgets.QDialog

A dialog class that provides calculation of new fields using existing fields, values and a set of operators

Sample usage of the QgsFieldCalculator class:

        uri = "point?crs=epsg:4326&field=id:integer"
        layer = QgsVectorLayer(uri, "Scratch point layer",  "memory")
        layer.startEditing()
        dialog = QgsFieldCalculator(layer)
        dialog.exec_()

.. autoautosummary:: qgis.gui.QgsFieldCalculator
    :enums:
    :nosignatures:

.. autoautosummary:: qgis.gui.QgsFieldCalculator
    :methods:
    :nosignatures:

.. autoautosummary:: qgis.gui.QgsFieldCalculator
    :signals:
    :nosignatures:

.. autoautosummary:: qgis.gui.QgsFieldCalculator
    :attributes:

accept(self)

actionEvent(self, a0: QActionEvent | None)

changeEvent(self, a0: QEvent | None)

changedAttributeId(self) → int

Returns the field index of the field for which new attribute values were calculated.

Return type:

int

Returns:

The field index if attribute values were calculated or -1, e.g. in case of geometry changes.

childEvent(self, a0: QChildEvent | None)

closeEvent(self, a0: QCloseEvent | None)

connectNotify(self, signal: QMetaMethod)

contextMenuEvent(self, a0: QContextMenuEvent | None)

create(self, window: PyQt5.sip.voidptr = None, initializeWindow: bool = True, destroyOldWindow: bool = True)

customEvent(self, a0: QEvent | None)

destroy(self, destroyWindow: bool = True, destroySubWindows: bool = True)

disconnectNotify(self, signal: QMetaMethod)

dragEnterEvent(self, a0: QDragEnterEvent | None)

dragLeaveEvent(self, a0: QDragLeaveEvent | None)

dragMoveEvent(self, a0: QDragMoveEvent | None)

dropEvent(self, a0: QDropEvent | None)

enterEvent(self, a0: QEvent | None)

event(self, a0: QEvent | None) → bool

eventFilter(self, a0: QObject | None, a1: QEvent | None) → bool

focusInEvent(self, a0: QFocusEvent | None)

focusNextChild(self) → bool

focusNextPrevChild(self, next: bool) → bool

focusOutEvent(self, a0: QFocusEvent | None)

focusPreviousChild(self) → bool

hideEvent(self, a0: QHideEvent | None)

initPainter(self, painter: QPainter | None)

inputMethodEvent(self, a0: QInputMethodEvent | None)

isSignalConnected(self, signal: QMetaMethod) → bool

keyPressEvent(self, a0: QKeyEvent | None)

keyReleaseEvent(self, a0: QKeyEvent | None)

leaveEvent(self, a0: QEvent | None)

metric(self, a0: QPaintDevice.PaintDeviceMetric) → int

mouseDoubleClickEvent(self, a0: QMouseEvent | None)

mouseMoveEvent(self, a0: QMouseEvent | None)

mousePressEvent(self, a0: QMouseEvent | None)

mouseReleaseEvent(self, a0: QMouseEvent | None)

moveEvent(self, a0: QMoveEvent | None)

nativeEvent(self, eventType: QByteArray | bytes | bytearray, message: PyQt5.sip.voidptr | None)

paintEvent(self, a0: QPaintEvent | None)

receivers(self, signal: PYQT_SIGNAL) → int

resizeEvent(self, a0: QResizeEvent | None)

sender(self) → QObject | None

senderSignalIndex(self) → int

sharedPainter(self) → QPainter | None

showEvent(self, a0: QShowEvent | None)

tabletEvent(self, a0: QTabletEvent | None)

timerEvent(self, a0: QTimerEvent | None)

updateMicroFocus(self)

wheelEvent(self, a0: QWheelEvent | None)