Qt 4.8
Public Functions | List of all members
QGifPlugin Class Reference
Inheritance diagram for QGifPlugin:
QImageIOPlugin QObject QImageIOHandlerFactoryInterface QFactoryInterface

Public Functions

Capabilities capabilities (QIODevice *device, const QByteArray &format) const
 Returns the capabilities on the plugin, based on the data in device and the format format. More...
 
QImageIOHandlercreate (QIODevice *device, const QByteArray &format=QByteArray()) const
 Creates and returns a QImageIOHandler subclass, with device and format set. More...
 
QStringList keys () const
 Returns the list of image keys this plugin supports. More...
 
 QGifPlugin ()
 
 ~QGifPlugin ()
 
- Public Functions inherited from QImageIOPlugin
 QImageIOPlugin (QObject *parent=0)
 Constructs an image plugin with the given parent. More...
 
virtual ~QImageIOPlugin ()
 Destroys the picture format plugin. More...
 
- Public Functions inherited from QObject
bool blockSignals (bool b)
 If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...
 
const QObjectListchildren () const
 Returns a list of child objects. More...
 
bool connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
 
bool disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0)
 
bool disconnect (const QObject *receiver, const char *member=0)
 
void dumpObjectInfo ()
 Dumps information about signal connections, etc. More...
 
void dumpObjectTree ()
 Dumps a tree of children to the debug output. More...
 
QList< QByteArraydynamicPropertyNames () const
 Returns the names of all properties that were dynamically added to the object using setProperty(). More...
 
virtual bool event (QEvent *)
 This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
 
virtual bool eventFilter (QObject *, QEvent *)
 Filters events if this object has been installed as an event filter for the watched object. More...
 
template<typename T >
findChild (const QString &aName=QString()) const
 Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...
 
template<typename T >
QList< T > findChildren (const QString &aName=QString()) const
 Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...
 
template<typename T >
QList< T > findChildren (const QRegExp &re) const
 
bool inherits (const char *classname) const
 Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...
 
void installEventFilter (QObject *)
 Installs an event filter filterObj on this object. More...
 
bool isWidgetType () const
 Returns true if the object is a widget; otherwise returns false. More...
 
void killTimer (int id)
 Kills the timer with timer identifier, id. More...
 
virtual const QMetaObjectmetaObject () const
 Returns a pointer to the meta-object of this object. More...
 
void moveToThread (QThread *thread)
 Changes the thread affinity for this object and its children. More...
 
QString objectName () const
 
QObjectparent () const
 Returns a pointer to the parent object. More...
 
QVariant property (const char *name) const
 Returns the value of the object's name property. More...
 
Q_INVOKABLE QObject (QObject *parent=0)
 Constructs an object with parent object parent. More...
 
void removeEventFilter (QObject *)
 Removes an event filter object obj from this object. More...
 
void setObjectName (const QString &name)
 
void setParent (QObject *)
 Makes the object a child of parent. More...
 
bool setProperty (const char *name, const QVariant &value)
 Sets the value of the object's name property to value. More...
 
void setUserData (uint id, QObjectUserData *data)
 
bool signalsBlocked () const
 Returns true if signals are blocked; otherwise returns false. More...
 
int startTimer (int interval)
 Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...
 
QThreadthread () const
 Returns the thread in which the object lives. More...
 
QObjectUserDatauserData (uint id) const
 
virtual ~QObject ()
 Destroys the object, deleting all its child objects. More...
 
- Public Functions inherited from QFactoryInterface
virtual ~QFactoryInterface ()
 

Additional Inherited Members

- Public Types inherited from QImageIOPlugin
enum  Capability { CanRead = 0x1, CanWrite = 0x2, CanReadIncremental = 0x4 }
 This enum describes the capabilities of a QImageIOPlugin. More...
 
- Public Slots inherited from QObject
void deleteLater ()
 Schedules this object for deletion. More...
 
- Signals inherited from QObject
void destroyed (QObject *=0)
 This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...
 
- Static Public Functions inherited from QObject
static bool connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
 Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...
 
static bool connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
 
static bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
 Disconnects signal in object sender from method in object receiver. More...
 
static bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
 
static uint registerUserData ()
 
static QString tr (const char *sourceText, const char *comment=0, int n=-1)
 
static QString trUtf8 (const char *sourceText, const char *comment=0, int n=-1)
 
- Static Public Variables inherited from QObject
static const QMetaObject staticMetaObject
 This variable stores the meta-object for the class. More...
 
- Protected Functions inherited from QObject
virtual void childEvent (QChildEvent *)
 This event handler can be reimplemented in a subclass to receive child events. More...
 
virtual void connectNotify (const char *signal)
 This virtual function is called when something has been connected to signal in this object. More...
 
virtual void customEvent (QEvent *)
 This event handler can be reimplemented in a subclass to receive custom events. More...
 
virtual void disconnectNotify (const char *signal)
 This virtual function is called when something has been disconnected from signal in this object. More...
 
 QObject (QObjectPrivate &dd, QObject *parent=0)
 
int receivers (const char *signal) const
 Returns the number of receivers connected to the signal. More...
 
QObjectsender () const
 Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...
 
int senderSignalIndex () const
 
virtual void timerEvent (QTimerEvent *)
 This event handler can be reimplemented in a subclass to receive timer events for the object. More...
 
- Protected Variables inherited from QObject
QScopedPointer< QObjectDatad_ptr
 
- Static Protected Variables inherited from QObject
static const QMetaObject staticQtMetaObject
 

Detailed Description

Definition at line 54 of file main.cpp.

Constructors and Destructors

◆ QGifPlugin()

QGifPlugin::QGifPlugin ( )

Definition at line 65 of file main.cpp.

66 {
67 }

◆ ~QGifPlugin()

QGifPlugin::~QGifPlugin ( )

Definition at line 69 of file main.cpp.

70 {
71 }

Functions

◆ capabilities()

QImageIOPlugin::Capabilities QGifPlugin::capabilities ( QIODevice device,
const QByteArray format 
) const
virtual

Returns the capabilities on the plugin, based on the data in device and the format format.

For example, if the QImageIOHandler supports the BMP format, and the data in the device starts with the characters "BM", this function should return CanRead . If format is "bmp" and the handler supports both reading and writing, this function should return CanRead | CanWrite .

Implements QImageIOPlugin.

Definition at line 78 of file main.cpp.

79 {
80  if (format == "gif" || (device && device->isReadable() && QGifHandler::canRead(device)))
81  return Capabilities(CanRead);
82  return 0;
83 }
bool canRead() const
Returns true if an image can be read from the device (i.
bool isReadable() const
Returns true if data can be read from the device; otherwise returns false.
Definition: qiodevice.cpp:544

◆ create()

QImageIOHandler * QGifPlugin::create ( QIODevice device,
const QByteArray format = QByteArray() 
) const
virtual

Creates and returns a QImageIOHandler subclass, with device and format set.

The format must come from the list returned by keys(). Format names are case sensitive.

See also
keys()

Implements QImageIOPlugin.

Definition at line 85 of file main.cpp.

86 {
88  handler->setDevice(device);
89  handler->setFormat(format);
90  return handler;
91 }
void setFormat(const QByteArray &format)
Sets the format of the QImageIOHandler to format.
void setDevice(QIODevice *device)
Sets the device of the QImageIOHandler to device.
The QImageIOHandler class defines the common image I/O interface for all image formats in Qt...
QImageIOHandler * handler

◆ keys()

QStringList QGifPlugin::keys ( ) const
virtual

Returns the list of image keys this plugin supports.

These keys are usually the names of the image formats that are implemented in the plugin (e.g., "jpg" or "gif").

See also
capabilities()

Implements QImageIOPlugin.

Definition at line 73 of file main.cpp.

74 {
75  return QStringList() << QLatin1String("gif");
76 }
QLatin1String(DBUS_INTERFACE_DBUS))) Q_GLOBAL_STATIC_WITH_ARGS(QString
The QStringList class provides a list of strings.
Definition: qstringlist.h:66

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