QgsProviderExtentCalcEvent Class Reference

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

#include <qgsproviderextentcalcevent.h>

Collaboration diagram for QgsProviderExtentCalcEvent:

Public Member Functions
	QgsProviderExtentCalcEvent (QgsRectangle *layerExtent)
QgsRectangle *	layerExtent () const

Private Attributes
QgsRectangle *	le

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().

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

• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgsproviderextentcalcevent.h
• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgsproviderextentcalcevent.cpp