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QGIS API Documentation
3.4.15-Madeira (e83d02e274)
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QGIS API Documentation
3.4.15-Madeira (e83d02e274)
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Intermediate base class adding functionality that allows client to query the rendered image. More...
#include <qgsmaprendererjob.h>
Public Member Functions | |
| QgsMapRendererQImageJob (const QgsMapSettings &settings) | |
| virtual QImage | renderedImage ()=0 |
| Gets a preview/resulting image. More... | |
 Public Member Functions inherited from QgsMapRendererJob | |
| QgsMapRendererJob (const QgsMapSettings &settings) | |
| 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... | |
| const QgsFeatureFilterProvider * | featureFilterProvider () const |
| Returns the feature filter provider used by the QgsRenderContext of each LayerRenderJob. More... | |
| virtual bool | isActive () const =0 |
| Tell whether the rendering job is currently running in background. More... | |
| const QgsMapSettings & | mapSettings () const |
| Returns 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) |
| Set the feature filter provider used by the QgsRenderContext of each LayerRenderJob. More... | |
| virtual void | start ()=0 |
| Start the rendering job and immediately return. More... | |
| virtual QgsLabelingResults * | takeLabelingResults ()=0 |
| Gets pointer to internal labeling engine (in order to get access to the results). More... | |
| virtual bool | usedCachedLabels () const =0 |
| Returns true if the render job was able to use a cached labeling solution. More... | |
| virtual void | waitForFinished ()=0 |
| Block until the job has finished. More... | |
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 Q_DECL_DEPRECATED void | drawLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext, QgsLabelingEngine *labelingEngine2, QPainter *painter) |
| static void | drawLabeling (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 |
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
Definition at line 322 of file qgsmaprendererjob.h.
| QgsMapRendererQImageJob::QgsMapRendererQImageJob | ( | const QgsMapSettings & | settings | ) |
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pure virtual |
Gets a preview/resulting image.
Implemented in QgsMapRendererSequentialJob, and QgsMapRendererParallelJob.
1.8.11
