Class: QgsCurveEditorWidget¶

A widget for manipulating QgsCurveTransform curves.

Class Hierarchy¶

Base classes¶

QWidget
QObject
QPaintDevice

Methods

`curve`	Returns a curve representing the current curve from the widget.
`maxHistogramValueRange`	Returns the maximum expected value for the range of values shown in the histogram.
`minHistogramValueRange`	Returns the minimum expected value for the range of values shown in the histogram.
`setCurve`	Sets the curve to show in the widget.
`setHistogramSource`	Sets a layer and expression source for values to show in a histogram behind the curve.
`setMaxHistogramValueRange`	Sets the maximum expected value for the range of values shown in the histogram.
`setMinHistogramValueRange`	Sets the minimum expected value for the range of values shown in the histogram.

Signals

changed

Emitted when the widget curve changes

class qgis.gui.QgsCurveEditorWidget[source]¶

Bases: QWidget

__init__(parent: QWidget | None = None, curve: QgsCurveTransform = QgsCurveTransform())

Constructor for QgsCurveEditorWidget.

Parameters:

parent (Optional[QWidget] = None)
curve (QgsCurveTransform = QgsCurveTransform())

signal changed[source]¶: Emitted when the widget curve changes

curve(self) → QgsCurveTransform[source]¶

Returns a curve representing the current curve from the widget.

See also

setCurve()

Return type:: QgsCurveTransform

maxHistogramValueRange(self) → float[source]¶

Returns the maximum expected value for the range of values shown in the histogram.

See also

minHistogramValueRange()

See also

setMaxHistogramValueRange()

Return type:: float

minHistogramValueRange(self) → float[source]¶

Returns the minimum expected value for the range of values shown in the histogram.

See also

maxHistogramValueRange()

See also

setMinHistogramValueRange()

Return type:: float

setCurve(self, curve: QgsCurveTransform)[source]¶

Sets the curve to show in the widget.

See also

curve()

Parameters:: curve (QgsCurveTransform)

setHistogramSource(self, layer: QgsVectorLayer | None, expression: str | None)[source]¶

Sets a layer and expression source for values to show in a histogram behind the curve. The histogram is generated in a background thread to keep the widget responsive.

See also

minHistogramValueRange()

See also

maxHistogramValueRange()

Parameters: