Intermediate base class adding functionality that allows client to query the rendered image. More...

#include <qgsmaprendererjob.h>

Inheritance diagram for QgsMapRendererQImageJob:

[legend]

Public Member Functions
	QgsMapRendererQImageJob (const QgsMapSettings &settings)

virtual QImage	renderedImage ()=0
	Get a preview/resulting image. More...

Public Member Functions inherited from QgsMapRendererJob
	QgsMapRendererJob (const QgsMapSettings &settings)

virtual	~QgsMapRendererJob ()

virtual void	cancel ()=0
	Stop the rendering job - does not return until the job has terminated. More...

virtual void	cancelWithoutBlocking ()=0
	Triggers cancellation of the rendering job without blocking. More...

Errors	errors () const
	List of errors that happened during the rendering job - available when the rendering has been finished. More...

virtual bool	isActive () const =0
	Tell whether the rendering job is currently running in background. More...

const QgsMapSettings &	mapSettings () const
	Return map settings with which this job was started. More...

int	renderingTime () const
	Find out how log it took to finish the job (in miliseconds) More...

void	setCache (QgsMapRendererCache *cache)
	Assign a cache to be used for reading and storing rendered images of individual layers. More...

void	setRequestedGeometryCacheForLayers (const QStringList &layerIds)
	Set which vector layers should be cached while rendering. More...

virtual void	start ()=0
	Start the rendering job and immediately return. More...

virtual QgsLabelingResults *	takeLabelingResults ()=0
	Get pointer to internal labeling engine (in order to get access to the results) More...

virtual void	waitForFinished ()=0
	Block until the job has finished. More...

Public Member Functions inherited from QObject
	QObject (QObject *parent)

	QObject (QObject parent, const char name)

virtual	~QObject ()

bool	blockSignals (bool block)

QObject *	child (const char objName, const char inheritsClass, bool recursiveSearch) const

const QObjectList &	children () const

const char *	className () const

bool	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const

void	deleteLater ()

void	destroyed (QObject *obj)

bool	disconnect (const QObject receiver, const char method)

bool	disconnect (const char signal, const QObject receiver, const char *method)

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QByteArray >	dynamicPropertyNames () const

virtual bool	event (QEvent *e)

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name) const

QList< T >	findChildren (const QRegExp &regExp) const

QList< T >	findChildren (const QString &name) const

bool	inherits (const char *className) const

void	insertChild (QObject *object)

void	installEventFilter (QObject *filterObj)

bool	isA (const char *className) const

bool	isWidgetType () const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

const char *	name () const

const char *	name (const char *defaultName) const

QString	objectName () const

QObject *	parent () const

QVariant	property (const char *name) const

void	removeChild (QObject *object)

void	removeEventFilter (QObject *obj)

void	setName (const char *name)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const char *name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval)

QThread *	thread () const

Additional Inherited Members
Public Types inherited from QgsMapRendererJob
typedef QList< Error >	Errors

Signals inherited from QgsMapRendererJob
void	finished ()
	emitted when asynchronous rendering is finished (or canceled). More...

Static Public Member Functions inherited from QObject
bool	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

bool	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

QString	tr (const char sourceText, const char disambiguation, int n)

QString	trUtf8 (const char sourceText, const char disambiguation, int n)

Protected Member Functions inherited from QgsMapRendererJob
void	cleanupJobs (LayerRenderJobs &jobs)

void	logRenderingTime (const LayerRenderJobs &jobs)

bool	needTemporaryImage (QgsMapLayer *ml)

LayerRenderJobs	prepareJobs (QPainter painter, QgsPalLabeling labelingEngine, QgsLabelingEngineV2 *labelingEngine2)

void	updateLayerGeometryCaches ()
	called when rendering has finished to update all layers' geometry caches More...

Protected Member Functions inherited from QObject
bool	checkConnectArgs (const char signal, const QObject object, const char *method)

virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const char *signal)

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const char *signal)

int	receivers (const char *signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Static Protected Member Functions inherited from QgsMapRendererJob
static QImage	composeImage (const QgsMapSettings &settings, const LayerRenderJobs &jobs)

static void	drawLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext, QgsPalLabeling labelingEngine, QgsLabelingEngineV2 labelingEngine2, QPainter *painter)

static void	drawNewLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext, QgsPalLabeling *labelingEngine)

static void	drawOldLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext)

static bool	reprojectToLayerExtent (const QgsMapLayer ml, const QgsCoordinateTransform ct, QgsRectangle &extent, QgsRectangle &r2)
	Convenience function to project an extent into the layer source CRS, but also split it into two extents if it crosses the +/- 180 degree line. More...

Static Protected Member Functions inherited from QObject
QByteArray	normalizeSignalSlot (const char *signalSlot)

Protected Attributes inherited from QgsMapRendererJob
QgsMapRendererCache *	mCache

Errors	mErrors

QMap< QString, QgsGeometryCache >	mGeometryCaches
	map of geometry caches More...

QTime	mRenderingStart

int	mRenderingTime

QStringList	mRequestedGeomCacheForLayers
	list of layer IDs for which the geometry cache should be updated More...

QgsMapSettings	mSettings

Properties inherited from QObject
	objectName

Detailed Description

Intermediate base class adding functionality that allows client to query the rendered image.

The image can be queried even while the rendering is still in progress to get intermediate result

Note: added in 2.4

Definition at line 207 of file qgsmaprendererjob.h.

Constructor & Destructor Documentation

◆ QgsMapRendererQImageJob()

QgsMapRendererQImageJob::QgsMapRendererQImageJob ( const QgsMapSettings & settings )

Definition at line 45 of file qgsmaprendererjob.cpp.

Member Function Documentation

◆ renderedImage()

virtual QImage QgsMapRendererQImageJob::renderedImage ( )

pure virtual

Get a preview/resulting image.

Implemented in QgsMapRendererSequentialJob, and QgsMapRendererParallelJob.

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

/tmp/buildd/qgis-2.18.21+99unstable/src/core/qgsmaprendererjob.h
/tmp/buildd/qgis-2.18.21+99unstable/src/core/qgsmaprendererjob.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsMapRendererQImageJob()

Member Function Documentation

◆ renderedImage()