QgsMapCanvasUtils Class Reference

Utility functions for working with QgsMapCanvas widgets. More...

#include <qgsmapcanvasutils.h>

Static Public Member Functions
static QString	filterForLayer (QgsMapCanvas *canvas, QgsVectorLayer *layer)
	Constructs a filter to use for selecting features from the given layer, in order to apply filters which prevent some features from being displayed (e.g.
static long	flashMatchingFeatures (QgsMapCanvas *canvas, QgsVectorLayer *layer, const QString &filter)
	Flashes features from the specified layer which match the given filter expression string with a map canvas.
static long	zoomToMatchingFeatures (QgsMapCanvas *canvas, QgsVectorLayer *layer, const QString &filter)
	Zooms a map canvas to features from the specified layer which match the given filter expression string.

Detailed Description

Utility functions for working with QgsMapCanvas widgets.

Since

QGIS 3.14

Definition at line 31 of file qgsmapcanvasutils.h.

Member Function Documentation

filterForLayer()

QString QgsMapCanvasUtils::filterForLayer ( QgsMapCanvas *  canvas, QgsVectorLayer *  layer  )

static

Constructs a filter to use for selecting features from the given layer, in order to apply filters which prevent some features from being displayed (e.g.

as a result of temporal range of the canvas and the layer's temporal settings).

Will return an empty string if no filtering is required, or "\c false" if ALL features are filtered out by the canvas.

Since

QGIS 3.26

Definition at line 79 of file qgsmapcanvasutils.cpp.

flashMatchingFeatures()

long QgsMapCanvasUtils::flashMatchingFeatures ( QgsMapCanvas *  canvas, QgsVectorLayer *  layer, const QString &  filter  )

static

Flashes features from the specified layer which match the given filter expression string with a map canvas.

The total count of matching features will be returned.

Definition at line 55 of file qgsmapcanvasutils.cpp.

zoomToMatchingFeatures()

long QgsMapCanvasUtils::zoomToMatchingFeatures ( QgsMapCanvas *  canvas, QgsVectorLayer *  layer, const QString &  filter  )

static

Zooms a map canvas to features from the specified layer which match the given filter expression string.

The total count of matching features will be returned.

Definition at line 22 of file qgsmapcanvasutils.cpp.

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

• /build/qgis-3.40.0+99sid/src/gui/qgsmapcanvasutils.h
• /build/qgis-3.40.0+99sid/src/gui/qgsmapcanvasutils.cpp