Class: QgsColorWheel

class qgis.gui.QgsColorWheel

Bases: QgsColorWidget

A color wheel widget. This widget consists of an outer ring which allows for hue selection, and an inner rotating triangle which allows for saturation and value selection.

New in version 2.5.

QgsColorWheel(parent: QWidget = None) Constructs a new color wheel widget.

Parameters

parent

parent QWidget for the widget

Methods

actionEvent

alterColor

Alters a color by modifying the value of a specific color component

changeEvent

childEvent

closeEvent

componentRange

Returns the range of valid values for the color widget’s component

componentValue

Returns the current value of the widget’s color component

connectNotify

contextMenuEvent

create

customEvent

destroy

disconnectNotify

dragEnterEvent

dragLeaveEvent

dragMoveEvent

dropEvent

enterEvent

event

focusInEvent

focusNextChild

focusNextPrevChild

focusOutEvent

focusPreviousChild

hideEvent

hue

Returns the hue for the widget.

initPainter

inputMethodEvent

isSignalConnected

keyPressEvent

keyReleaseEvent

leaveEvent

metric

mouseDoubleClickEvent

mouseMoveEvent

param event

mousePressEvent

param event

mouseReleaseEvent

param event

moveEvent

nativeEvent

paintEvent

param event

receivers

resizeEvent

param event

sender

senderSignalIndex

setColor

param color

sharedPainter

showEvent

sizeHint

rtype

QSize

tabletEvent

timerEvent

transparentBackground

Generates a checkboard pattern pixmap for use as a background to transparent colors

updateMicroFocus

wheelEvent

actionEvent(self, QActionEvent)
alterColor(self, color: Union[QColor, Qt.GlobalColor, QGradient], component: QgsColorWidget.ColorComponent, newValue: int)

Alters a color by modifying the value of a specific color component

Parameters
  • color – color to alter

  • component – color component to alter

  • newValue – new value of color component. Values are automatically clipped to a valid range for the color component.

changeEvent(self, QEvent)
childEvent(self, QChildEvent)
closeEvent(self, QCloseEvent)
componentRange(self)int

Returns the range of valid values for the color widget’s component

Returns

maximum value allowed for color component, or -1 if widget has multiple components

componentRange(self, component: QgsColorWidget.ColorComponent) -> int Returns the range of valid values a color component

Returns

maximum value allowed for color component

componentValue(self)int

Returns the current value of the widget’s color component

Returns

value of color component, or -1 if widget has multiple components or an invalid color set

See also

setComponentValue()

See also

component()

componentValue(self, component: QgsColorWidget.ColorComponent) -> int Returns the value of a component of the widget’s current color. This method correctly handles hue values when the color has an ambiguous hue (e.g., black or white shades)

Parameters

component – color component to return

Returns

value of color component, or -1 if widget has an invalid color set

See also

hue()

connectNotify(self, QMetaMethod)
contextMenuEvent(self, QContextMenuEvent)
create(self, window: sip.voidptr = 0, initializeWindow: bool = True, destroyOldWindow: bool = True)
customEvent(self, QEvent)
destroy(self, destroyWindow: bool = True, destroySubWindows: bool = True)
disconnectNotify(self, QMetaMethod)
dragEnterEvent(self, e: QDragEnterEvent)
dragLeaveEvent(self, QDragLeaveEvent)
dragMoveEvent(self, QDragMoveEvent)
dropEvent(self, e: QDropEvent)
enterEvent(self, QEvent)
event(self, QEvent)bool
focusInEvent(self, QFocusEvent)
focusNextChild(self)bool
focusNextPrevChild(self, bool)bool
focusOutEvent(self, QFocusEvent)
focusPreviousChild(self)bool
hideEvent(self, QHideEvent)
hue(self)int

Returns the hue for the widget. This may differ from the hue for the QColor returned by color(), as QColor returns a hue of -1 if the color’s hue is ambiguous (e.g., if the saturation is zero).

Returns

explicitly set hue for widget

initPainter(self, QPainter)
inputMethodEvent(self, QInputMethodEvent)
isSignalConnected(self, QMetaMethod)bool
keyPressEvent(self, QKeyEvent)
keyReleaseEvent(self, QKeyEvent)
leaveEvent(self, QEvent)
metric(self, QPaintDevice.PaintDeviceMetric)int
mouseDoubleClickEvent(self, QMouseEvent)
mouseMoveEvent(self, event: QMouseEvent)
Parameters

event (QMouseEvent) –

mousePressEvent(self, event: QMouseEvent)
Parameters

event (QMouseEvent) –

mouseReleaseEvent(self, event: QMouseEvent)
Parameters

event (QMouseEvent) –

moveEvent(self, QMoveEvent)
nativeEvent(self, Union[QByteArray, bytes, bytearray], sip.voidptr)Tuple[bool, int]
paintEvent(self, event: QPaintEvent)
Parameters

event (QPaintEvent) –

receivers(self, PYQT_SIGNAL)int
resizeEvent(self, event: QResizeEvent)
Parameters

event (QResizeEvent) –

sender(self)QObject
senderSignalIndex(self)int
setColor(self, color: Union[QColor, Qt.GlobalColor, QGradient], emitSignals: bool = False)
Parameters
  • color (Union[QColor) –

  • emitSignals (bool = False) –

sharedPainter(self)QPainter
showEvent(self, QShowEvent)
sizeHint(self)QSize
Return type

QSize

tabletEvent(self, QTabletEvent)
timerEvent(self, QTimerEvent)
transparentBackground()QPixmap

Generates a checkboard pattern pixmap for use as a background to transparent colors

Returns

checkerboard pixmap

updateMicroFocus(self)
wheelEvent(self, QWheelEvent)