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plugin.cpp Example File
^{demos/arthurplugin/plugin.cpp}

    #include <QtDesigner/QDesignerContainerExtension>
    #include <QtDesigner/QDesignerCustomWidgetInterface>

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

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

    class QDesignerFormEditorInterface;

    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)
            public:
        DemoPlugin() : m_initialized(false) { }
        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;
        }
    private:
        bool m_initialized;
    };

    class DeformPlugin : public QObject, public DemoPlugin
    {
        Q_OBJECT
    public:
        DeformPlugin(QObject *parent = 0) : QObject(parent) { }

        QString includeFile() const { return "deform.h"; }
        QString name() const { return "PathDeformRendererEx"; }

        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) { textEditor = new QLineEdit; }
        QSize sizeHint() const { return QSize(300, 200); }

    public slots:
    void setText(const QString &text) { textEditor->setText(text); }
    };

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

        QWidget *createWidget(QWidget *parent)
        {
            XFormRendererEx *xform = new XFormRendererEx(parent);
            xform->setText("Qt - Hello World!!");
            return xform;
        }
    };

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

        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) { }
        QString includeFile() const { return "gradients.h"; }
        QString name() const { return "GradientRendererEx"; }

        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) { }
        QString includeFile() const { return "pathstroke.h"; }
        QString name() const { return "PathStrokeRendererEx"; }

        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) { }
        QString includeFile() const { return "composition.h"; }
        QString name() const { return "CompositionRenderer"; }

        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:
        QList<QDesignerCustomWidgetInterface*> customWidgets() const
        {
            QList<QDesignerCustomWidgetInterface *> plugins;
            plugins
                << new DeformPlugin
                << new XFormPlugin
                << new GradientEditorPlugin
                << new GradientRendererPlugin
                << new StrokeRenderPlugin
                << new CompositionModePlugin;
            return plugins;
        }
    };

    #include "plugin.moc"

    Q_EXPORT_PLUGIN(ArthurPlugins)