QgsProviderExtentCalcEvent Class Reference
[QGIS core library]

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:

[legend]

List of all members.

Public Member Functions
	QgsProviderExtentCalcEvent (QgsRectangle *layerExtent)
QgsRectangle *	layerExtent () const
Private Attributes
QgsRectangle *	le

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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 43 of file qgsproviderextentcalcevent.h.

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Constructor & Destructor Documentation

QgsProviderExtentCalcEvent::QgsProviderExtentCalcEvent

(

QgsRectangle *

layerExtent

)

Definition at line 23 of file qgsproviderextentcalcevent.cpp.

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Member Function Documentation

QgsRectangle * QgsProviderExtentCalcEvent::layerExtent

(

)

const

Definition at line 31 of file qgsproviderextentcalcevent.cpp.

References le.

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Member Data Documentation

QgsRectangle* QgsProviderExtentCalcEvent::le [private]

Definition at line 55 of file qgsproviderextentcalcevent.h.

Referenced by layerExtent().

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

• src/core/qgsproviderextentcalcevent.h
• src/core/qgsproviderextentcalcevent.cpp