QGIS API Documentation
3.0.2-Girona (307d082)
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Job implementation that renders everything sequentially in one thread. More...
#include <qgsmaprenderersequentialjob.h>
Public Slots | |
void | internalFinished () |
Public Member Functions | |
QgsMapRendererSequentialJob (const QgsMapSettings &settings) | |
~QgsMapRendererSequentialJob () override | |
void | cancel () override |
Stop the rendering job - does not return until the job has terminated. More... | |
void | cancelWithoutBlocking () override |
Triggers cancelation of the rendering job without blocking. More... | |
bool | isActive () const override |
Tell whether the rendering job is currently running in background. More... | |
QImage | renderedImage () override |
Get a preview/resulting image. More... | |
void | start () override |
Start the rendering job and immediately return. More... | |
QgsLabelingResults * | takeLabelingResults () override |
Get pointer to internal labeling engine (in order to get access to the results). More... | |
bool | usedCachedLabels () const override |
Returns true if the render job was able to use a cached labeling solution. More... | |
void | waitForFinished () override |
Block until the job has finished. More... | |
Public Member Functions inherited from QgsMapRendererQImageJob | |
QgsMapRendererQImageJob (const QgsMapSettings &settings) | |
Public Member Functions inherited from QgsMapRendererJob | |
QgsMapRendererJob (const QgsMapSettings &settings) | |
Errors | errors () const |
List of errors that happened during the rendering job - available when the rendering has been finished. More... | |
const QgsFeatureFilterProvider * | featureFilterProvider () const |
const QgsMapSettings & | mapSettings () const |
Return map settings with which this job was started. More... | |
QHash< QgsMapLayer *, int > | perLayerRenderingTime () const |
Returns the render time (in ms) per layer. More... | |
int | renderingTime () const |
Returns the total time it took to finish the job (in milliseconds). More... | |
void | setCache (QgsMapRendererCache *cache) |
Assign a cache to be used for reading and storing rendered images of individual layers. More... | |
void | setFeatureFilterProvider (const QgsFeatureFilterProvider *f) |
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). More... | |
void | renderingLayersFinished () |
Emitted when the layers are rendered. More... | |
Static Public Attributes inherited from QgsMapRendererJob | |
static const QString | LABEL_CACHE_ID |
QgsMapRendererCache ID string for cached label image. More... | |
Protected Member Functions inherited from QgsMapRendererJob | |
void | cleanupJobs (LayerRenderJobs &jobs) |
void | cleanupLabelJob (LabelRenderJob &job) |
Handles clean up tasks for a label job, including deletion of images and storing cached label results. More... | |
void | logRenderingTime (const LayerRenderJobs &jobs, const LabelRenderJob &labelJob) |
LayerRenderJobs | prepareJobs (QPainter *painter, QgsLabelingEngine *labelingEngine2) |
bool | prepareLabelCache () const |
Prepares the cache for storing the result of labeling. More... | |
LabelRenderJob | prepareLabelingJob (QPainter *painter, QgsLabelingEngine *labelingEngine2, bool canUseLabelCache=true) |
Prepares a labeling job. More... | |
Static Protected Member Functions inherited from QgsMapRendererJob | |
static QImage | composeImage (const QgsMapSettings &settings, const LayerRenderJobs &jobs, const LabelRenderJob &labelJob) |
static void | drawLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext, QgsLabelingEngine *labelingEngine2, QPainter *painter) |
Protected Attributes inherited from QgsMapRendererJob | |
QgsMapRendererCache * | mCache = nullptr |
Errors | mErrors |
QHash< QgsWeakMapLayerPointer, int > | mPerLayerRenderingTime |
Render time (in ms) per layer, by layer ID. More... | |
QTime | mRenderingStart |
int | mRenderingTime = 0 |
QgsMapSettings | mSettings |
Job implementation that renders everything sequentially in one thread.
The resulting map image can be retrieved with renderedImage() function. It is safe to call that function while rendering is active to see preview of the map.
Definition at line 33 of file qgsmaprenderersequentialjob.h.
QgsMapRendererSequentialJob::QgsMapRendererSequentialJob | ( | const QgsMapSettings & | settings | ) |
Definition at line 22 of file qgsmaprenderersequentialjob.cpp.
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override |
Definition at line 34 of file qgsmaprenderersequentialjob.cpp.
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overridevirtual |
Stop the rendering job - does not return until the job has terminated.
Does nothing if the rendering is not active.
Implements QgsMapRendererJob.
Definition at line 74 of file qgsmaprenderersequentialjob.cpp.
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overridevirtual |
Triggers cancelation of the rendering job without blocking.
The render job will continue to operate until it is able to cancel, at which stage the finished() signal will be emitted. Does nothing if the rendering is not active.
Implements QgsMapRendererJob.
Definition at line 85 of file qgsmaprenderersequentialjob.cpp.
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slot |
Definition at line 128 of file qgsmaprenderersequentialjob.cpp.
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overridevirtual |
Tell whether the rendering job is currently running in background.
Implements QgsMapRendererJob.
Definition at line 102 of file qgsmaprenderersequentialjob.cpp.
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overridevirtual |
Get a preview/resulting image.
Implements QgsMapRendererQImageJob.
Definition at line 118 of file qgsmaprenderersequentialjob.cpp.
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overridevirtual |
Start the rendering job and immediately return.
Does nothing if the rendering is already in progress.
Implements QgsMapRendererJob.
Definition at line 48 of file qgsmaprenderersequentialjob.cpp.
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overridevirtual |
Get pointer to internal labeling engine (in order to get access to the results).
This should not be used if cached labeling was redrawn - see usedCachedLabels().
Implements QgsMapRendererJob.
Definition at line 112 of file qgsmaprenderersequentialjob.cpp.
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overridevirtual |
Returns true if the render job was able to use a cached labeling solution.
If so, any previously stored labeling results (see takeLabelingResults()) should be retained.
Implements QgsMapRendererJob.
Definition at line 107 of file qgsmaprenderersequentialjob.cpp.
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overridevirtual |
Block until the job has finished.
Implements QgsMapRendererJob.
Definition at line 94 of file qgsmaprenderersequentialjob.cpp.