QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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Abstract base class for map renderer jobs which use custom painters. More...
#include <qgsmaprenderercustompainterjob.h>
Public Member Functions | |
QgsMapRendererAbstractCustomPainterJob (const QgsMapSettings &settings) | |
Constructor for QgsMapRendererAbstractCustomPainterJob, using the given map settings. | |
Public Member Functions inherited from QgsMapRendererJob | |
QgsMapRendererJob (const QgsMapSettings &settings) | |
~QgsMapRendererJob () override | |
virtual void | cancel ()=0 |
Stop the rendering job - does not return until the job has terminated. | |
virtual void | cancelWithoutBlocking ()=0 |
Triggers cancellation of the rendering job without blocking. | |
Errors | errors () const |
List of errors that happened during the rendering job - available when the rendering has been finished. | |
const QgsFeatureFilterProvider * | featureFilterProvider () const |
Returns the feature filter provider used by the QgsRenderContext of each LayerRenderJob. | |
virtual bool | isActive () const =0 |
Tell whether the rendering job is currently running in background. | |
QgsLabelingEngineFeedback * | labelingEngineFeedback () |
Returns the associated labeling engine feedback object. | |
QgsLabelSink * | labelSink () const |
Returns the label sink associated to this rendering job. | |
QStringList | layersRedrawnFromCache () const |
Returns a list of the layer IDs for all layers which were redrawn from cached images. | |
const QgsMapSettings & | mapSettings () const |
Returns map settings with which this job was started. | |
QHash< QgsMapLayer *, int > | perLayerRenderingTime () const |
Returns the render time (in ms) per layer. | |
int | renderingTime () const |
Returns the total time it took to finish the job (in milliseconds). | |
void | setCache (QgsMapRendererCache *cache) |
Assign a cache to be used for reading and storing rendered images of individual layers. | |
void | setFeatureFilterProvider (const QgsFeatureFilterProvider *f) |
Set the feature filter provider used by the QgsRenderContext of each LayerRenderJob. | |
void | setLabelSink (QgsLabelSink *sink) |
Assigns the label sink which will take over responsibility for handling labels during the rendering job. | |
void | setLayerRenderingTimeHints (const QHash< QString, int > &hints) |
Sets approximate render times (in ms) for map layers. | |
void | start () |
Start the rendering job and immediately return. | |
virtual QgsLabelingResults * | takeLabelingResults ()=0 |
Gets pointer to internal labeling engine (in order to get access to the results). | |
QgsRenderedItemResults * | takeRenderedItemResults () |
Takes the rendered item results from the map render job and returns them. | |
virtual bool | usedCachedLabels () const =0 |
Returns true if the render job was able to use a cached labeling solution. | |
virtual void | waitForFinished ()=0 |
Block until the job has finished. | |
Protected Member Functions | |
void | preparePainter (QPainter *painter, const QColor &backgroundColor=Qt::transparent) |
Prepares the given painter ready for a map render. | |
Protected Member Functions inherited from QgsMapRendererJob | |
void | cleanupJobs (std::vector< LayerRenderJob > &jobs) |
void | cleanupLabelJob (LabelRenderJob &job) |
Handles clean up tasks for a label job, including deletion of images and storing cached label results. | |
void | cleanupSecondPassJobs (std::vector< LayerRenderJob > &jobs) |
void | initSecondPassJobs (std::vector< LayerRenderJob > &secondPassJobs, LabelRenderJob &labelJob) const |
Initialize secondPassJobs according to what have been rendered (mask clipping path e.g.) in first pass jobs and labelJob. | |
void | logRenderingTime (const std::vector< LayerRenderJob > &jobs, const std::vector< LayerRenderJob > &secondPassJobs, const LabelRenderJob &labelJob) |
QList< QPointer< QgsMapLayer > > | participatingLabelLayers (QgsLabelingEngine *engine) |
Returns a list of the layers participating in the map labeling. | |
std::vector< LayerRenderJob > | prepareJobs (QPainter *painter, QgsLabelingEngine *labelingEngine2, bool deferredPainterSet=false) |
Creates a list of layer rendering jobs and prepares them for later render. | |
bool | prepareLabelCache () const |
Prepares the cache for storing the result of labeling. | |
LabelRenderJob | prepareLabelingJob (QPainter *painter, QgsLabelingEngine *labelingEngine2, bool canUseLabelCache=true) |
Prepares a labeling job. | |
std::vector< LayerRenderJob > | prepareSecondPassJobs (std::vector< LayerRenderJob > &firstPassJobs, LabelRenderJob &labelJob) |
Prepares jobs for a second pass, if selective masks exist (from labels or symbol layers). | |
Additional Inherited Members | |
Public Types inherited from QgsMapRendererJob | |
typedef QList< QgsMapRendererJob::Error > | Errors |
Signals inherited from QgsMapRendererJob | |
void | finished () |
emitted when asynchronous rendering is finished (or canceled). | |
void | layerRendered (const QString &layerId) |
Emitted when a layer has completed rendering. | |
void | layerRenderingStarted (const QString &layerId) |
Emitted just before rendering starts for a particular layer. | |
void | renderingLayersFinished () |
Emitted when the layers are rendered. | |
Static Public Attributes inherited from QgsMapRendererJob | |
static const QString | ELEVATION_MAP_CACHE_PREFIX |
QgsMapRendererCache prefix string for cached elevation map image. | |
static const QString | LABEL_CACHE_ID |
QgsMapRendererCache ID string for cached label image. | |
static const QString | LABEL_PREVIEW_CACHE_ID |
QgsMapRendererCache ID string for cached label image during preview compositions only. | |
static const QgsSettingsEntryBool * | settingsLogCanvasRefreshEvent = new QgsSettingsEntryBool( QStringLiteral( "logCanvasRefreshEvent" ), QgsSettingsTree::sTreeMap, false ) |
Settings entry log canvas refresh event. | |
static const QgsSettingsEntryString * | settingsMaskBackend = new QgsSettingsEntryString( QStringLiteral( "mask-backend" ), QgsSettingsTree::sTreeMap, QString(), QStringLiteral( "Backend engine to use for selective masking" ) ) |
Settings entry for mask painting backend engine. | |
Static Protected Member Functions inherited from QgsMapRendererJob | |
static QImage | composeImage (const QgsMapSettings &settings, const std::vector< LayerRenderJob > &jobs, const LabelRenderJob &labelJob, const QgsMapRendererCache *cache=nullptr) |
static void | composeSecondPass (std::vector< LayerRenderJob > &secondPassJobs, LabelRenderJob &labelJob, bool forceVector=false) |
Compose second pass images into first pass images. | |
static Q_DECL_DEPRECATED void | drawLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext, QgsLabelingEngine *labelingEngine2, QPainter *painter) |
static void | drawLabeling (QgsRenderContext &renderContext, QgsLabelingEngine *labelingEngine2, QPainter *painter) |
static QgsElevationMap | layerElevationToBeComposed (const QgsMapSettings &settings, const LayerRenderJob &job, const QgsMapRendererCache *cache) |
static QImage | layerImageToBeComposed (const QgsMapSettings &settings, const LayerRenderJob &job, const QgsMapRendererCache *cache) |
Protected Attributes inherited from QgsMapRendererJob | |
QList< QPointer< QgsMapLayer > > | mAdditionalLabelLayers |
Additional layers participating in labeling problem. | |
QgsMapRendererCache * | mCache = nullptr |
Errors | mErrors |
QHash< QString, int > | mLayerRenderingTimeHints |
Approximate expected layer rendering time per layer, by layer ID. | |
QStringList | mLayersRedrawnFromCache |
QHash< QgsWeakMapLayerPointer, int > | mPerLayerRenderingTime |
Render time (in ms) per layer, by layer ID. | |
bool | mRecordRenderingTime = true |
true if layer rendering time should be recorded. | |
std::unique_ptr< QgsRenderedItemResults > | mRenderedItemResults |
QElapsedTimer | mRenderingStart |
int | mRenderingTime = 0 |
QgsMapSettings | mSettings |
Abstract base class for map renderer jobs which use custom painters.
Definition at line 31 of file qgsmaprenderercustompainterjob.h.
QgsMapRendererAbstractCustomPainterJob::QgsMapRendererAbstractCustomPainterJob | ( | const QgsMapSettings & | settings | ) |
Constructor for QgsMapRendererAbstractCustomPainterJob, using the given map settings.
Definition at line 32 of file qgsmaprenderercustompainterjob.cpp.
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protected |
Prepares the given painter ready for a map render.
The backgroundColor argument specifies the color to use for the map's background.
Definition at line 38 of file qgsmaprenderercustompainterjob.cpp.