diff options
Diffstat (limited to 'src/styles/qstyleplugin.cpp')
| -rw-r--r-- | src/styles/qstyleplugin.cpp | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/styles/qstyleplugin.cpp b/src/styles/qstyleplugin.cpp new file mode 100644 index 0000000..99364ee --- /dev/null +++ b/src/styles/qstyleplugin.cpp @@ -0,0 +1,185 @@ +/**************************************************************************** +** +** Implementation of QSqlDriverPlugin class +** +** Created : 010920 +** +** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the widgets module of the Qt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free Qt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing requirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at sales@trolltech.com. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.QPL +** included in the packaging of this file. Licensees holding valid Qt +** Commercial licenses may use this file in accordance with the Qt +** Commercial License Agreement provided with the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#include "qstyleplugin.h" + +#ifndef QT_NO_STYLE +#ifndef QT_NO_COMPONENT + +#include "qstyleinterface_p.h" +#include "qobjectcleanuphandler.h" +#include "qstyle.h" + +/*! + \class QStylePlugin qstyleplugin.h + \brief The QStylePlugin class provides an abstract base for custom QStyle plugins. + + \ingroup plugins + + The style plugin is a simple plugin interface that makes it easy + to create custom styles that can be loaded dynamically into + applications with a QStyleFactory. + + Writing a style plugin is achieved by subclassing this base class, + reimplementing the pure virtual functions keys() and create(), and + exporting the class with the \c Q_EXPORT_PLUGIN macro. See the + \link plugins-howto.html plugins documentation\endlink for an + example. +*/ + +/*! + \fn QStringList QStylePlugin::keys() const + + Returns the list of style keys this plugin supports. + + These keys are usually the class names of the custom styles that + are implemented in the plugin. + + \sa create() +*/ + +/*! + \fn QStyle* QStylePlugin::create( const QString& key ) + + Creates and returns a QStyle object for the style key \a key. The + style key is usually the class name of the required style. + + \sa keys() +*/ + +class QStylePluginPrivate : public QStyleFactoryInterface, public QLibraryInterface +{ +public: + QStylePluginPrivate( QStylePlugin *p ) + : plugin( p ) + { + } + + virtual ~QStylePluginPrivate(); + + QRESULT queryInterface( const QUuid &iid, QUnknownInterface **iface ); + Q_REFCOUNT; + + QStringList featureList() const; + QStyle *create( const QString &key ); + + bool init(); + void cleanup(); + bool canUnload() const; + +private: + QStylePlugin *plugin; + QObjectCleanupHandler styles; +}; + +QRESULT QStylePluginPrivate::queryInterface( const QUuid &iid, QUnknownInterface **iface ) +{ + *iface = 0; + + if ( iid == IID_QUnknown ) + *iface = (QStyleFactoryInterface*)this; + else if ( iid == IID_QFeatureList ) + *iface = (QFeatureListInterface*)this; + else if ( iid == IID_QStyleFactory ) + *iface = (QStyleFactoryInterface*)this; + else if ( iid == IID_QLibrary ) + *iface = (QLibraryInterface*) this; + else + return QE_NOINTERFACE; + + (*iface)->addRef(); + return QS_OK; +} + +QStylePluginPrivate::~QStylePluginPrivate() +{ + delete plugin; +} + +QStringList QStylePluginPrivate::featureList() const +{ + return plugin->keys(); +} + +QStyle *QStylePluginPrivate::create( const QString &key ) +{ + QStyle *st = plugin->create( key ); + styles.add( st ); + return st; +} + +bool QStylePluginPrivate::init() +{ + return TRUE; +} + +void QStylePluginPrivate::cleanup() +{ + styles.clear(); +} + +bool QStylePluginPrivate::canUnload() const +{ + return styles.isEmpty(); +} + + +/*! + Constructs a style plugin. This is invoked automatically by the + \c Q_EXPORT_PLUGIN macro. +*/ +QStylePlugin::QStylePlugin() + : QGPlugin( (QStyleFactoryInterface*)(d = new QStylePluginPrivate( this )) ) +{ +} + +/*! + Destroys the style plugin. + + You never have to call this explicitly. Qt destroys a plugin + automatically when it is no longer used. +*/ +QStylePlugin::~QStylePlugin() +{ + // don't delete d, as this is deleted by d +} + +#endif // QT_NO_COMPONENT +#endif // QT_NO_STYLE |