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| |
| #include "qpictureformatplugin.h" |
| #if !defined(QT_NO_PICTURE) |
| #include "qpicture.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| /*! |
| \obsolete |
| |
| \class QPictureFormatPlugin |
| \brief The QPictureFormatPlugin class provides an abstract base |
| for custom picture format plugins. |
| |
| \ingroup plugins |
| \inmodule QtGui |
| |
| The picture format plugin is a simple plugin interface that makes |
| it easy to create custom picture formats that can be used |
| transparently by applications. |
| |
| Writing an picture format plugin is achieved by subclassing this |
| base class, reimplementing the pure virtual functions |
| loadPicture(), savePicture(), and installIOHandler(), and |
| exporting the class with the Q_PLUGIN_METADATA() macro. |
| |
| The json file containing the metadata should contain one entry |
| with the list of picture formats supported by the plugin: |
| |
| \code |
| { "Keys": [ "mypictureformat" ] } |
| \endcode |
| |
| \sa {How to Create Qt Plugins} |
| */ |
| |
| /*! |
| \fn bool QPictureFormatPlugin::installIOHandler(const QString &format) |
| |
| Installs a QPictureIO picture I/O handler for the picture format \a |
| format. Returns \c true on success. |
| */ |
| |
| |
| /*! |
| Constructs an picture format plugin with the given \a parent. |
| This is invoked automatically by the moc generated code that exports the plugin. |
| */ |
| QPictureFormatPlugin::QPictureFormatPlugin(QObject *parent) |
| : QObject(parent) |
| { |
| } |
| |
| /*! |
| Destroys the picture format plugin. |
| |
| You never have to call this explicitly. Qt destroys a plugin |
| automatically when it is no longer used. |
| */ |
| QPictureFormatPlugin::~QPictureFormatPlugin() |
| { |
| } |
| |
| |
| /*! |
| Loads the picture stored in the file called \a fileName, with the |
| given \a format, into *\a picture. Returns \c true on success; |
| otherwise returns \c false. |
| |
| \sa savePicture() |
| */ |
| bool QPictureFormatPlugin::loadPicture(const QString &format, const QString &fileName, QPicture *picture) |
| { |
| Q_UNUSED(format) |
| Q_UNUSED(fileName) |
| Q_UNUSED(picture) |
| return false; |
| } |
| |
| /*! |
| Saves the given \a picture into the file called \a fileName, |
| using the specified \a format. Returns \c true on success; otherwise |
| returns \c false. |
| |
| \sa loadPicture() |
| */ |
| bool QPictureFormatPlugin::savePicture(const QString &format, const QString &fileName, const QPicture &picture) |
| { |
| Q_UNUSED(format) |
| Q_UNUSED(fileName) |
| Q_UNUSED(picture) |
| return false; |
| } |
| |
| #endif // QT_NO_PICTURE |
| |
| QT_END_NAMESPACE |