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2.4.0-Chugiak
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QGIS API Documentation
2.4.0-Chugiak
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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. More... | |
 Public Member Functions inherited from QgsMapRendererJob | |
| QgsMapRendererJob (const QgsMapSettings &settings) | |
| virtual | ~QgsMapRendererJob () |
| virtual void | start ()=0 |
| Start the rendering job and immediately return. More... | |
| virtual void | cancel ()=0 |
| Stop the rendering job - does not return until the job has terminated. More... | |
| virtual void | waitForFinished ()=0 |
| Block until the job has finished. More... | |
| virtual bool | isActive () const =0 |
| Tell whether the rendering job is currently running in background. More... | |
| virtual QgsLabelingResults * | takeLabelingResults ()=0 |
| Get pointer to internal labeling engine (in order to get access to the results) More... | |
| Errors | errors () const |
| List of errors that happened during the rendering job - available when the rendering has been finished. 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... | |
| int | renderingTime () const |
| Find out how log it took to finish the job (in miliseconds) More... | |
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... | |
| Protected Member Functions inherited from QgsMapRendererJob | |
| LayerRenderJobs | prepareJobs (QPainter *painter, QgsPalLabeling *labelingEngine) |
| void | cleanupJobs (LayerRenderJobs &jobs) |
| bool | needTemporaryImage (QgsMapLayer *ml) |
| void | updateLayerGeometryCaches () |
| called when rendering has finished to update all layers' geometry caches More... | |
| Static Protected Member Functions inherited from QgsMapRendererJob | |
| 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. More... | |
| static QImage | composeImage (const QgsMapSettings &settings, const LayerRenderJobs &jobs) |
| static void | drawLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext, QgsPalLabeling *labelingEngine, QPainter *painter) |
| static void | drawOldLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext) |
| static void | drawNewLabeling (const QgsMapSettings &settings, QgsRenderContext &renderContext, QgsPalLabeling *labelingEngine) |
| Protected Attributes inherited from QgsMapRendererJob | |
| QgsMapSettings | mSettings |
| Errors | mErrors |
| QgsMapRendererCache * | mCache |
| QStringList | mRequestedGeomCacheForLayers |
| list of layer IDs for which the geometry cache should be updated More... | |
| QMap< QString, QgsGeometryCache > | mGeometryCaches |
| map of geometry caches More... | |
| QTime | mRenderingStart |
| int | mRenderingTime |
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 181 of file qgsmaprendererjob.h.
| QgsMapRendererQImageJob::QgsMapRendererQImageJob | ( | const QgsMapSettings & | settings | ) |
Definition at line 43 of file qgsmaprendererjob.cpp.
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pure virtual |
Get a preview/resulting image.
Implemented in QgsMapRendererSequentialJob, and QgsMapRendererParallelJob.
Referenced by QgsMapOverviewCanvas::mapRenderingFinished(), QgsMapCanvas::mapUpdateTimeout(), and QgsMapCanvas::rendererJobFinished().
1.8.7