Qt 4.3: plugin.cpp Example File (demos/arthurplugin/plugin.cpp)

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

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     #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)