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QgsProviderExtentCalcEvent Class Reference

A custom event that is designed to be fired when a layer extent has been fully calculated. More...

#include <qgsproviderextentcalcevent.h>

Inheritance diagram for QgsProviderExtentCalcEvent:
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Public Member Functions

 QgsProviderExtentCalcEvent (QgsRectangle *layerExtent)
 
QgsRectanglelayerExtent () const
 

Detailed Description

A custom event that is designed to be fired when a layer extent has been fully calculated.

Author
Brendan Morley
Date
March 2005

This custom QEvent is designed to be fired when the full extent of a layer has been calculated. It was initially included in QGIS to help the QgsPostgresProvider provide the asynchronous calculation of PostgreSQL layer extents.

Events are used instead of Qt signals/slots as events can be received asynchronously, which makes for better mutlithreading behaviour and less opportunity for programmer mishap.

Constructor & Destructor Documentation

QgsProviderExtentCalcEvent::QgsProviderExtentCalcEvent ( QgsRectangle layerExtent)

Member Function Documentation

QgsRectangle * QgsProviderExtentCalcEvent::layerExtent ( ) const

The documentation for this class was generated from the following files: