qgswidgetwrapper.h

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/***************************************************************************
    qgswidgetwrapper.h
     --------------------------------------
    Date                 : 14.5.2014
    Copyright            : (C) 2013 Matthias Kuhn
    Email                : matthias at opengis dot ch
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSWIDGETWRAPPER_H
#define QGSWIDGETWRAPPER_H

#include <QObject>
#include <QMap>
#include <QVariant>

class QgsVectorLayer;

#include "qgsattributeeditorcontext.h"
#include "qgis_gui.h"
#include "qgis_sip.h"
#include "qgspropertycollection.h"

#ifdef SIP_RUN
// This is required for the ConvertToSubClassCode to work properly
// so RTTI for casting is available in the whole module.
% ModuleCode
#include "qgsrelationwidgetwrapper.h"
#include "qgsqmlwidgetwrapper.h"
% End
#endif

class GUI_EXPORT QgsWidgetWrapper : public QObject
{

#ifdef SIP_RUN
    SIP_CONVERT_TO_SUBCLASS_CODE
    if ( qobject_cast<QgsEditorWidgetWrapper *>( sipCpp ) )
      sipType = sipType_QgsEditorWidgetWrapper;
    else if ( qobject_cast<QgsRelationWidgetWrapper *>( sipCpp ) )
      sipType = sipType_QgsRelationWidgetWrapper;
    else if ( qobject_cast<QgsQmlWidgetWrapper *>( sipCpp ) )
      sipType = sipType_QgsQmlWidgetWrapper;
    else
      sipType = 0;
    SIP_END
#endif

    Q_OBJECT
  public:

    enum Property
    {
      RootPath = 0, 
      DocumentViewerContent 
    };

    static const QgsPropertiesDefinition &propertyDefinitions();

    explicit QgsWidgetWrapper( QgsVectorLayer *vl, QWidget *editor = nullptr, QWidget *parent = nullptr );

    QWidget *widget();

    template <class T> SIP_SKIP
    T *widget() { return dynamic_cast<T>( mWidget ); }

    void setConfig( const QVariantMap &config );

    void setContext( const QgsAttributeEditorContext &context );

    QVariant config( const QString &key, const QVariant &defaultVal = QVariant() ) const;

    QVariantMap config() const;

    const QgsAttributeEditorContext &context() const;

    QgsVectorLayer *layer() const;

    static QgsWidgetWrapper *fromWidget( QWidget *widget );

    virtual bool valid() const = 0;


    QgsPropertyCollection &dataDefinedProperties() { return mPropertyCollection; } SIP_SKIP

    const QgsPropertyCollection &dataDefinedProperties() const { return mPropertyCollection; }

    void setDataDefinedProperties( const QgsPropertyCollection &collection ) { mPropertyCollection = collection; }

    void notifyAboutToSave();

  signals:

    void contextChanged();

  protected:

    virtual QWidget *createWidget( QWidget *parent ) = 0;

    virtual void initWidget( QWidget *editor );

    QgsPropertyCollection mPropertyCollection;

  public slots:

    virtual void setFeature( const QgsFeature &feature ) = 0;

    virtual void setEnabled( bool enabled );

  private:

    virtual void aboutToSave();

    QgsAttributeEditorContext mContext;
    QVariantMap mConfig;
    QWidget *mWidget = nullptr;
    QWidget *mParent = nullptr;
    QgsVectorLayer *mLayer = nullptr;
    bool mInitialized;
};

// We'll use this class inside a QVariant in the widgets properties
Q_DECLARE_METATYPE( QgsWidgetWrapper * )

#endif // QGSWIDGETWRAPPER_H