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QGIS API Documentation
2.8.2-Wien
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QGIS API Documentation
2.8.2-Wien
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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 |
| Get a preview/resulting image. | |
 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. | |
| Errors | errors () const |
| List of errors that happened during the rendering job - available when the rendering has been finished. | |
| virtual bool | isActive () const =0 |
| Tell whether the rendering job is currently running in background. | |
| const QgsMapSettings & | mapSettings () const |
| Return map settings with which this job was started. | |
| int | renderingTime () const |
| Find out how log it took to finish the job (in miliseconds) | |
| void | setCache (QgsMapRendererCache *cache) |
| Assign a cache to be used for reading and storing rendered images of individual layers. | |
| void | setRequestedGeometryCacheForLayers (const QStringList &layerIds) |
| Set which vector layers should be cached while rendering. | |
| virtual void | start ()=0 |
| Start the rendering job and immediately return. | |
| virtual QgsLabelingResults * | takeLabelingResults ()=0 |
| Get pointer to internal labeling engine (in order to get access to the results) | |
| virtual void | waitForFinished ()=0 |
| Block until the job has finished. | |
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). | |
| Protected Member Functions inherited from QgsMapRendererJob | |
| void | cleanupJobs (LayerRenderJobs &jobs) |
| bool | needTemporaryImage (QgsMapLayer *ml) |
| LayerRenderJobs | prepareJobs (QPainter *painter, QgsPalLabeling *labelingEngine) |
| void | updateLayerGeometryCaches () |
| called when rendering has finished to update all layers' geometry caches | |
| 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, QPainter *painter) |
| static void | drawNewLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext, QgsPalLabeling *labelingEngine) |
| static void | drawOldLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext) |
| static bool | reprojectToLayerExtent (const QgsCoordinateTransform *ct, bool layerCrsGeographic, 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. | |
| Protected Attributes inherited from QgsMapRendererJob | |
| QgsMapRendererCache * | mCache |
| Errors | mErrors |
| QMap< QString, QgsGeometryCache > | mGeometryCaches |
| map of geometry caches | |
| QTime | mRenderingStart |
| int | mRenderingTime |
| QStringList | mRequestedGeomCacheForLayers |
| list of layer IDs for which the geometry cache should be updated | |
| 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 188 of file qgsmaprendererjob.h.
| QgsMapRendererQImageJob::QgsMapRendererQImageJob | ( | const QgsMapSettings & | settings | ) |
Definition at line 44 of file qgsmaprendererjob.cpp.
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pure virtual |
Get a preview/resulting image.
Implemented in QgsMapRendererSequentialJob, and QgsMapRendererParallelJob.
1.8.1.2