Class: QgsRasterHistogramWidget

class qgis.gui.QgsRasterHistogramWidget

Bases: QgsMapLayerConfigWidget

Histogram widget

QgsRasterHistogramWidget(layer: QgsRasterLayer, parent: QWidget = None) Constructor for QgsRasterHistogramWidget, for the specified raster layer.

Methods

actionEvent

apply

changeEvent

childEvent

closeEvent

computeHistogram

Compute the histogram on demand.

connectNotify

contextMenuEvent

create

customEvent

destroy

disconnectNotify

dragEnterEvent

dragLeaveEvent

dragMoveEvent

dropEvent

enterEvent

event

focusInEvent

focusNextChild

focusNextPrevChild

focusOutEvent

focusPreviousChild

hideEvent

histoAction

Apply a histoActionTriggered() event.

histoSaveAsImage

Save the histogram as an image to disk

initPainter

inputMethodEvent

isSignalConnected

keyPressEvent

Overridden key press event to handle the esc event on the widget.

keyReleaseEvent

leaveEvent

metric

mouseDoubleClickEvent

mouseMoveEvent

mousePressEvent

mouseReleaseEvent

moveEvent

nativeEvent

paintEvent

receivers

refreshHistogram

slot executed when user wishes to refresh raster histogramwidget

resizeEvent

sender

senderSignalIndex

setActive

Activate the histogram widget

setRendererWidget

Sets the renderer widget (or just its name if there is no widget)

setSelectedBand

Apply a histoActionTriggered() event.

sharedPainter

showEvent

tabletEvent

timerEvent

updateMicroFocus

wheelEvent

actionEvent(self, QActionEvent)
apply(self)
changeEvent(self, QEvent)
childEvent(self, QChildEvent)
closeEvent(self, QCloseEvent)
computeHistogram(self, forceComputeFlag: bool)bool

Compute the histogram on demand.

Parameters

forceComputeFlag (bool) –

Return type

bool

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, QDragEnterEvent)
dragLeaveEvent(self, QDragLeaveEvent)
dragMoveEvent(self, QDragMoveEvent)
dropEvent(self, 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)
histoAction(self, actionName: str, actionFlag: bool = True)

Apply a histoActionTriggered() event.

Parameters
  • actionName (str) –

  • actionFlag (bool = True) –

histoSaveAsImage(self, filename: str, width: int = 600, height: int = 600, quality: int = - 1)bool

Save the histogram as an image to disk

Parameters
  • filename (str) –

  • width (int = 600) –

  • height (int = 600) –

  • quality (int = -1) –

Return type

bool

initPainter(self, QPainter)
inputMethodEvent(self, QInputMethodEvent)
isSignalConnected(self, QMetaMethod)bool
keyPressEvent(self, event: QKeyEvent)

Overridden key press event to handle the esc event on the widget.

Parameters

event – The key event

keyReleaseEvent(self, QKeyEvent)
leaveEvent(self, QEvent)
metric(self, QPaintDevice.PaintDeviceMetric)int
mouseDoubleClickEvent(self, QMouseEvent)
mouseMoveEvent(self, QMouseEvent)
mousePressEvent(self, QMouseEvent)
mouseReleaseEvent(self, QMouseEvent)
moveEvent(self, QMoveEvent)
nativeEvent(self, Union[QByteArray, bytes, bytearray], sip.voidptr)Tuple[bool, int]
paintEvent(self, QPaintEvent)
receivers(self, PYQT_SIGNAL)int
refreshHistogram(self)

slot executed when user wishes to refresh raster histogramwidget

resizeEvent(self, QResizeEvent)
sender(self)QObject
senderSignalIndex(self)int
setActive(self, activeFlag: bool)

Activate the histogram widget

Parameters

activeFlag (bool) –

setRendererWidget(self, name: str, rendererWidget: QgsRasterRendererWidget = None)

Sets the renderer widget (or just its name if there is no widget)

Parameters
setSelectedBand(self, index: int)

Apply a histoActionTriggered() event.

Parameters

index (int) –

sharedPainter(self)QPainter
showEvent(self, QShowEvent)
tabletEvent(self, QTabletEvent)
timerEvent(self, QTimerEvent)
updateMicroFocus(self)
wheelEvent(self, QWheelEvent)