Qt 4.5: plugin.cpp Example File (demos/arthurplugin/plugin.cpp)

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# plugin.cpp Example File
demos/arthurplugin/plugin.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** Commercial Usage
     ** Licensees holding valid Qt Commercial licenses may use this file in
     ** accordance with the Qt Commercial License Agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and Nokia.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
     ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
     **
     ** In addition, as a special exception, Nokia gives you certain additional
     ** rights.  These rights are described in the Nokia Qt LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU General Public License version 3.0 requirements will be
     ** met: http://www.gnu.org/copyleft/gpl.html.
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     #include <QtDesigner/QDesignerContainerExtension>
     #include <QtDesigner/QDesignerCustomWidgetInterface>

     #include <QtCore/qplugin.h>
     #include <QtGui/QIcon>
     #include <QtGui/QPixmap>

     #include "xform.h"
     #include "pathdeform.h"
     #include "gradients.h"
     #include "pathstroke.h"
     #include "hoverpoints.h"
     #include "composition.h"

     QT_FORWARD_DECLARE_CLASS(QDesignerFormEditorInterface)

     static inline QString customWidgetDomXml(const QString &className)
     {
         QString rc = QLatin1String("<ui language=\"c++\"><widget class=\"");
         rc += className;
         rc += QLatin1String("\" name=\"");
         QString objectName = className;
         objectName[0] = objectName.at(0).toLower();
         rc += objectName;
         rc += QLatin1String("\"/></ui>");
         return rc;
     }

     class PathDeformRendererEx : public PathDeformRenderer
     {
         Q_OBJECT
     public:
         PathDeformRendererEx(QWidget *parent) : PathDeformRenderer(parent) { }
         QSize sizeHint() const { return QSize(300, 200); }
     };

     class DemoPlugin : public QDesignerCustomWidgetInterface
     {
         Q_INTERFACES(QDesignerCustomWidgetInterface)

     protected:
         DemoPlugin(const QString &className);

     public:
         QString name() const { return m_className; }
         bool isContainer() const { return false; }
         bool isInitialized() const { return m_initialized; }
         QIcon icon() const { return QIcon(); }
         QString codeTemplate() const { return QString(); }
         QString whatsThis() const { return QString(); }
         QString toolTip() const { return QString(); }
         QString group() const { return "Arthur Widgets [Demo]"; }
         void initialize(QDesignerFormEditorInterface *)
         {
             if (m_initialized)
                 return;
             m_initialized = true;
         }
         QString domXml() const { return m_domXml; }

     private:
         const QString m_className;
         const QString m_domXml;
         bool m_initialized;
     };

     DemoPlugin::DemoPlugin(const QString &className) :
         m_className(className),
         m_domXml(customWidgetDomXml(className)),
         m_initialized(false)
     {
     }

     class DeformPlugin : public QObject, public DemoPlugin
     {
         Q_OBJECT

     public:
         DeformPlugin(QObject *parent = 0) : QObject(parent), DemoPlugin(QLatin1String("PathDeformRendererEx")) { }
         QString includeFile() const { return "deform.h"; }

         QWidget *createWidget(QWidget *parent)
         {
             PathDeformRenderer *deform = new PathDeformRendererEx(parent);
             deform->setRadius(70);
             deform->setAnimated(false);
             deform->setFontSize(20);
             deform->setText("Arthur Widgets Demo");

             return deform;
         }
     };

     class XFormRendererEx : public XFormView
     {
         Q_OBJECT
     public:
         XFormRendererEx(QWidget *parent) : XFormView(parent) {}
         QSize sizeHint() const { return QSize(300, 200); }
     };

     class XFormPlugin : public QObject, public DemoPlugin
     {
         Q_OBJECT
     public:
         XFormPlugin(QObject *parent = 0) : QObject(parent), DemoPlugin(QLatin1String("XFormRendererEx")) { }
         QString includeFile() const { return "xform.h"; }

         QWidget *createWidget(QWidget *parent)
         {
             XFormRendererEx *xform = new XFormRendererEx(parent);
             xform->setText("Qt - Hello World!!");
             xform->setPixmap(QPixmap(":/trolltech/arthurplugin/bg1.jpg"));
             return xform;
         }
     };

     class GradientEditorPlugin : public QObject, public DemoPlugin
     {
         Q_OBJECT
     public:
         GradientEditorPlugin(QObject *parent = 0) : QObject(parent), DemoPlugin(QLatin1String("GradientEditor")) { }
         QString includeFile() const { return "gradients.h"; }

         QWidget *createWidget(QWidget *parent)
         {
             GradientEditor *editor = new GradientEditor(parent);
             return editor;
         }
     };

     class GradientRendererEx : public GradientRenderer
     {
         Q_OBJECT
     public:
         GradientRendererEx(QWidget *p) : GradientRenderer(p) { }
         QSize sizeHint() const { return QSize(300, 200); }
     };

     class GradientRendererPlugin : public QObject, public DemoPlugin
     {
         Q_OBJECT
     public:
         GradientRendererPlugin(QObject *parent = 0) : QObject(parent), DemoPlugin(QLatin1String("GradientRendererEx")) { }
         QString includeFile() const { return "gradients.h"; }

         QWidget *createWidget(QWidget *parent)
         {
             GradientRenderer *renderer = new GradientRendererEx(parent);
             renderer->setConicalGradient();
             return renderer;
         }
     };

     class PathStrokeRendererEx : public PathStrokeRenderer
     {
         Q_OBJECT
     public:
         PathStrokeRendererEx(QWidget *p) : PathStrokeRenderer(p) { }
         QSize sizeHint() const { return QSize(300, 200); }
     };

     class StrokeRenderPlugin : public QObject, public DemoPlugin
     {
         Q_OBJECT
     public:
         StrokeRenderPlugin(QObject *parent = 0) : QObject(parent), DemoPlugin(QLatin1String("PathStrokeRendererEx")) { }
         QString includeFile() const { return "pathstroke.h"; }

         QWidget *createWidget(QWidget *parent)
         {
             PathStrokeRenderer *stroke = new PathStrokeRendererEx(parent);
             return stroke;
         }
     };

     class CompositionModePlugin : public QObject, public DemoPlugin
     {
         Q_OBJECT
     public:
         CompositionModePlugin(QObject *parent = 0) : QObject(parent), DemoPlugin(QLatin1String("CompositionRenderer")) { }
         QString includeFile() const { return "composition.h"; }

         QWidget *createWidget(QWidget *parent)
         {
             CompositionRenderer *renderer = new CompositionRenderer(parent);
             renderer->setAnimationEnabled(false);
             return renderer;
         }
     };

     class ArthurPlugins : public QObject, public QDesignerCustomWidgetCollectionInterface
     {
         Q_OBJECT
         Q_INTERFACES(QDesignerCustomWidgetCollectionInterface)

     public:
         ArthurPlugins(QObject *parent = 0);
         QList<QDesignerCustomWidgetInterface*> customWidgets() const { return m_plugins; }

     private:
         QList<QDesignerCustomWidgetInterface *> m_plugins;
     };

     ArthurPlugins::ArthurPlugins(QObject *parent) :
         QObject(parent)
     {
         m_plugins << new DeformPlugin(this)
                   << new XFormPlugin(this)
                   << new GradientEditorPlugin(this)
                   << new GradientRendererPlugin(this)
                   << new StrokeRenderPlugin(this)
                   << new CompositionModePlugin(this);
     }

     #include "plugin.moc"

     Q_EXPORT_PLUGIN2(ArthurPlugins, ArthurPlugins)