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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>

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Public Member Functions

 QgsProviderExtentCalcEvent (QgsRectangle *layerExtent)
 
QgsRectanglelayerExtent () const
 

Private Attributes

QgsRectanglele
 

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.

Definition at line 42 of file qgsproviderextentcalcevent.h.

Constructor & Destructor Documentation

QgsProviderExtentCalcEvent::QgsProviderExtentCalcEvent ( QgsRectangle layerExtent)

Definition at line 22 of file qgsproviderextentcalcevent.cpp.

Member Function Documentation

QgsRectangle * QgsProviderExtentCalcEvent::layerExtent ( ) const

Definition at line 30 of file qgsproviderextentcalcevent.cpp.

References le.

Member Data Documentation

QgsRectangle* QgsProviderExtentCalcEvent::le
private

Definition at line 54 of file qgsproviderextentcalcevent.h.

Referenced by layerExtent().


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