QGIS API Documentation  2.18.3-Las Palmas (77b8c3d)
Signals | Public Member Functions | List of all members
QgsImageFetcher Class Referenceabstract

Handles asynchronous download of images. More...

#include <qgsrasterdataprovider.h>

Inheritance diagram for QgsImageFetcher:
Inheritance graph
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Signals

void error (const QString &msg)
 Emitted when an error occurs. More...
 
void finish (const QImage &legend)
 Emitted when the download completes. More...
 
void progress (qint64 received, qint64 total)
 Emitted to report progress. More...
 

Public Member Functions

 QgsImageFetcher (QObject *parent=0)
 Constructor. More...
 
virtual ~QgsImageFetcher ()
 Destructor. More...
 
virtual void start ()=0
 Starts the image download. More...
 
- Public Member Functions inherited from QObject
 QObject (QObject *parent)
 
 QObject (QObject *parent, const char *name)
 
virtual  ~QObject ()
 
bool blockSignals (bool block)
 
QObjectchild (const char *objName, const char *inheritsClass, bool recursiveSearch) const
 
const QObjectList & children () const
 
const char * className () const
 
bool connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const
 
void deleteLater ()
 
void destroyed (QObject *obj)
 
bool disconnect (const QObject *receiver, const char *method)
 
bool disconnect (const char *signal, const QObject *receiver, const char *method)
 
void dumpObjectInfo ()
 
void dumpObjectTree ()
 
QList< QByteArraydynamicPropertyNames () const
 
virtual bool event (QEvent *e)
 
virtual bool eventFilter (QObject *watched, QEvent *event)
 
findChild (const QString &name) const
 
QList< T > findChildren (const QRegExp &regExp) const
 
QList< T > findChildren (const QString &name) const
 
bool inherits (const char *className) const
 
void insertChild (QObject *object)
 
void installEventFilter (QObject *filterObj)
 
bool isA (const char *className) const
 
bool isWidgetType () const
 
void killTimer (int id)
 
virtual const QMetaObjectmetaObject () const
 
void moveToThread (QThread *targetThread)
 
const char * name () const
 
const char * name (const char *defaultName) const
 
QString objectName () const
 
QObjectparent () const
 
QVariant property (const char *name) const
 
void removeChild (QObject *object)
 
void removeEventFilter (QObject *obj)
 
void setName (const char *name)
 
void setObjectName (const QString &name)
 
void setParent (QObject *parent)
 
bool setProperty (const char *name, const QVariant &value)
 
bool signalsBlocked () const
 
int startTimer (int interval)
 
QThreadthread () const
 

Additional Inherited Members

- Static Public Member Functions inherited from QObject
bool connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
 
bool connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
 
bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method)
 
bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
 
QString tr (const char *sourceText, const char *disambiguation, int n)
 
QString trUtf8 (const char *sourceText, const char *disambiguation, int n)
 
- Protected Member Functions inherited from QObject
bool checkConnectArgs (const char *signal, const QObject *object, const char *method)
 
virtual void childEvent (QChildEvent *event)
 
virtual void connectNotify (const char *signal)
 
virtual void customEvent (QEvent *event)
 
virtual void disconnectNotify (const char *signal)
 
int receivers (const char *signal) const
 
QObjectsender () const
 
int senderSignalIndex () const
 
virtual void timerEvent (QTimerEvent *event)
 
- Static Protected Member Functions inherited from QObject
QByteArray normalizeSignalSlot (const char *signalSlot)
 
- Properties inherited from QObject
 objectName
 

Detailed Description

Handles asynchronous download of images.

Note
added in 2.8

Definition at line 59 of file qgsrasterdataprovider.h.

Constructor & Destructor Documentation

QgsImageFetcher::QgsImageFetcher ( QObject parent = 0)
inline

Constructor.

Definition at line 64 of file qgsrasterdataprovider.h.

virtual QgsImageFetcher::~QgsImageFetcher ( )
inlinevirtual

Destructor.

Definition at line 66 of file qgsrasterdataprovider.h.

Member Function Documentation

void QgsImageFetcher::error ( const QString msg)
signal

Emitted when an error occurs.

void QgsImageFetcher::finish ( const QImage legend)
signal

Emitted when the download completes.

Parameters
legendThe downloaded legend image
void QgsImageFetcher::progress ( qint64  received,
qint64  total 
)
signal

Emitted to report progress.

virtual void QgsImageFetcher::start ( )
pure virtual

Starts the image download.

Note
Make sure to connect to "finish" and "error" before starting

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