QgsUnitSelectionWidget Class Reference

A widget displaying a combobox allowing the user to choose between various display units, such as millimeters or map units. More...

#include <qgsunitselectionwidget.h>

Inheritance diagram for QgsUnitSelectionWidget:

Signals
void	changed ()
	Emitted when the selected unit is changed, or the definition of the map unit scale is changed.

Public Member Functions
	QgsUnitSelectionWidget (QWidget *parent=nullptr)
	Constructor for QgsUnitSelectionWidget.
QgsMapUnitScale	getMapUnitScale () const
	Returns the map unit scale.
int	getUnit () const
	Gets the selected unit index.
void	setMapCanvas (QgsMapCanvas *canvas)
	Sets the map canvas associated with the widget.
void	setMapUnitScale (const QgsMapUnitScale &scale)
	Sets the map unit scale.
void	setShowMapScaleButton (bool show)
	Sets whether the widget can show the map scale button when the Map Units option is selected.
void	setUnit (int unitIndex)
	Sets the selected unit index.
void	setUnit (Qgis::RenderUnit unit)
	Sets the selected unit.
void	setUnits (const QgsUnitTypes::RenderUnitList &units)
	Sets the units which the user can choose from in the combobox.
void	setUnits (const QStringList &units, int mapUnitIdx)
	Sets the units which the user can choose from in the combobox.
bool	showMapScaleButton () const
	Returns true if the widget can show the map scale button when the Map Units option is selected.
Qgis::RenderUnit	unit () const
	Returns the current predefined selected unit (if applicable).

Detailed Description

A widget displaying a combobox allowing the user to choose between various display units, such as millimeters or map units.

If the user chooses map units, a button appears allowing adjustment of minimum and maximum scaling.

See also

QgsMapUnitScaleWidget

QgsMapUnitScaleDialog

Definition at line 159 of file qgsunitselectionwidget.h.

Constructor & Destructor Documentation

QgsUnitSelectionWidget()

QgsUnitSelectionWidget::QgsUnitSelectionWidget

(

QWidget *

parent = nullptr

)

Constructor for QgsUnitSelectionWidget.

Parameters

parent

parent widget

Definition at line 124 of file qgsunitselectionwidget.cpp.

Member Function Documentation

changed

void QgsUnitSelectionWidget::changed ( )

signal

Emitted when the selected unit is changed, or the definition of the map unit scale is changed.

getMapUnitScale()

QgsMapUnitScale QgsUnitSelectionWidget::getMapUnitScale ( ) const

inline

Returns the map unit scale.

Definition at line 206 of file qgsunitselectionwidget.h.

getUnit()

int QgsUnitSelectionWidget::getUnit ( ) const

inline

Gets the selected unit index.

Definition at line 184 of file qgsunitselectionwidget.h.

setMapCanvas()

void QgsUnitSelectionWidget::setMapCanvas

(

QgsMapCanvas *

canvas

)

Sets the map canvas associated with the widget.

This allows the widget to retrieve the current map scale from the canvas.

Parameters

canvas

map canvas

Definition at line 217 of file qgsunitselectionwidget.cpp.

setMapUnitScale()

void QgsUnitSelectionWidget::setMapUnitScale ( const QgsMapUnitScale &  scale )

inline

Sets the map unit scale.

Definition at line 209 of file qgsunitselectionwidget.h.

setShowMapScaleButton()

void QgsUnitSelectionWidget::setShowMapScaleButton

(

bool

show

)

Sets whether the widget can show the map scale button when the Map Units option is selected.

See also

showMapScaleButton()

Since

QGIS 3.22

Definition at line 272 of file qgsunitselectionwidget.cpp.

setUnit() [1/2]

void QgsUnitSelectionWidget::setUnit

(

int

unitIndex

)

Sets the selected unit index.

Parameters

unitIndex

index of unit to set as current

Note

available in Python bindings as setUnitIndex

Definition at line 204 of file qgsunitselectionwidget.cpp.

setUnit() [2/2]

void QgsUnitSelectionWidget::setUnit

(

Qgis::RenderUnit

unit

)

Sets the selected unit.

Parameters

unit	predefined unit to set as current

Definition at line 211 of file qgsunitselectionwidget.cpp.

setUnits() [1/2]

void QgsUnitSelectionWidget::setUnits

(

const QgsUnitTypes::RenderUnitList &

units

)

Sets the units which the user can choose from in the combobox.

Clears any existing units.

Parameters

units

list of valid units

Definition at line 150 of file qgsunitselectionwidget.cpp.

setUnits() [2/2]

void QgsUnitSelectionWidget::setUnits	(	const QStringList &	units,
		int	mapUnitIdx
	)

Sets the units which the user can choose from in the combobox.

Parameters

units	list of strings for custom units to display in the widget
mapUnitIdx	specifies which entry corresponds to the map units, or -1 if none

Definition at line 142 of file qgsunitselectionwidget.cpp.

showMapScaleButton()

bool QgsUnitSelectionWidget::showMapScaleButton

(

)

const

Returns true if the widget can show the map scale button when the Map Units option is selected.

See also

setShowMapScaleButton()

Since

QGIS 3.22

Definition at line 267 of file qgsunitselectionwidget.cpp.

unit()

Qgis::RenderUnit QgsUnitSelectionWidget::unit

(

)

const

Returns the current predefined selected unit (if applicable).

Returns

selected output unit, or QgsUnitTypes::RenderUnknownUnit if the widget was populated with custom unit types

Definition at line 190 of file qgsunitselectionwidget.cpp.

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The documentation for this class was generated from the following files:

• /build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/gui/qgsunitselectionwidget.h
• /build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/gui/qgsunitselectionwidget.cpp