QgsQuickScaleBarKit Class Reference

The class QgsQuickScaleBarKit encapsulates the utilies to calculate scale bar properties. More...

#include <qgsquickscalebarkit.h>

Inheritance diagram for QgsQuickScaleBarKit:

Public Slots
void	updateScaleBar ()
	recalculate width, distance and units. More...

Signals
void	mapSettingsChanged ()
	Associated map settings. More...
void	preferredWidthChanged ()
	Preferred width of scalebar in pixels. More...
void	scaleBarChanged ()
	width, distance and/or units changed More...
void	systemOfMeasurementChanged ()
	Preferred system of measurement for the result. More...

Public Member Functions
	QgsQuickScaleBarKit (QObject *parent=nullptr)
	create new scale bar kit More...
	~QgsQuickScaleBarKit ()=default
int	distance () const
	Units of distance (e.g. More...
void	setMapSettings (QgsQuickMapSettings *mapSettings)
	Associated map settings. More...
QString	units () const
	Units of distance (e.g. More...
int	width () const
	Calculated width of scalebar in pixels representing distance + units. More...

Properties
int	distance
	Distance rounded to "nice" number (e.g. More...
QgsQuickMapSettings	mapSettings
	Associated map settings. More...
int	preferredWidth
	Preferred width of scalebar in pixels. More...
QgsUnitTypes::SystemOfMeasurement	systemOfMeasurement
	Preferred system of measurement for the result. More...
QString	units
	Units of distance (e.g. More...
int	width
	Calculated width of scalebar in pixels representing distance + units. More...

Detailed Description

The class QgsQuickScaleBarKit encapsulates the utilies to calculate scale bar properties.

It requires connection to mapSettings of the active canvas to automatically update text and width

From preferred width in pixel, it calculates the width (pixel) of scalebar distance in meters or kilometers (int) rounded to "nice" number (e.g. 72.4 to 100) and units text (e.g. km)

System of measurement for result could be set too, so for example the resulting scalebar can show results in the imperial units.

Note

QML Type: ScaleBarKit

Since

QGIS 3.2

Definition at line 47 of file qgsquickscalebarkit.h.

Constructor & Destructor Documentation

QgsQuickScaleBarKit::QgsQuickScaleBarKit ( QObject *  parent = nullptr )

explicit

create new scale bar kit

Definition at line 27 of file qgsquickscalebarkit.cpp.

QgsQuickScaleBarKit::~QgsQuickScaleBarKit ( )

default

Member Function Documentation

int QgsQuickScaleBarKit::distance

(

)

const

Units of distance (e.g.

km or m) of result in desired systemOfMeasurement Read-only (result).

See also

QgsQuickScaleBarKit::units()

void QgsQuickScaleBarKit::mapSettingsChanged ( )

signal

Associated map settings.

Should be initialized before the first use from mapcanvas map settings.

void QgsQuickScaleBarKit::preferredWidthChanged ( )

signal

Preferred width of scalebar in pixels.

Default set to 300.

void QgsQuickScaleBarKit::scaleBarChanged ( )

signal

width, distance and/or units changed

void QgsQuickScaleBarKit::setMapSettings

(

QgsQuickMapSettings *

mapSettings

)

Associated map settings.

Should be initialized before the first use from mapcanvas map settings.

Definition at line 38 of file qgsquickscalebarkit.cpp.

void QgsQuickScaleBarKit::systemOfMeasurementChanged ( )

signal

Preferred system of measurement for the result.

QString QgsQuickScaleBarKit::units

(

)

const

Units of distance (e.g.

km or m) of result in desired systemOfMeasurement Read-only (result).

See also

QgsQuickScaleBarKit::distance()

void QgsQuickScaleBarKit::updateScaleBar ( )

slot

recalculate width, distance and units.

Definition at line 80 of file qgsquickscalebarkit.cpp.

int QgsQuickScaleBarKit::width

(

)

const

Calculated width of scalebar in pixels representing distance + units.

Differs minimum possible from preferredWidth to Gets "nice" distance number.

Property Documentation

int QgsQuickScaleBarKit::distance

read

Distance rounded to "nice" number (e.g.

100, 20) corresponding to width and system of measurement

To be used with units property for labels. Read-only (result).

Definition at line 76 of file qgsquickscalebarkit.h.

QgsQuickMapSettings QgsQuickScaleBarKit::mapSettings

write

Associated map settings.

Should be initialized before the first use from mapcanvas map settings.

Definition at line 54 of file qgsquickscalebarkit.h.

int QgsQuickScaleBarKit::preferredWidth

Preferred width of scalebar in pixels.

Default set to 300.

Definition at line 59 of file qgsquickscalebarkit.h.

QgsUnitTypes::SystemOfMeasurement QgsQuickScaleBarKit::systemOfMeasurement

Preferred system of measurement for the result.

Definition at line 64 of file qgsquickscalebarkit.h.

QString QgsQuickScaleBarKit::units

read

Units of distance (e.g.

km or m) of result in desired systemOfMeasurement Read-only (result).

Definition at line 69 of file qgsquickscalebarkit.h.

int QgsQuickScaleBarKit::width

read

Calculated width of scalebar in pixels representing distance + units.

Differs minimum possible from preferredWidth to Gets "nice" distance number.

Definition at line 82 of file qgsquickscalebarkit.h.

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

• /build/qgis-3.4.15+24xenial/src/quickgui/qgsquickscalebarkit.h
• /build/qgis-3.4.15+24xenial/src/quickgui/qgsquickscalebarkit.cpp