qgsattributeeditorelement.h

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/***************************************************************************
  qgsattributeeditorelement.h - QgsAttributeEditorElement

 ---------------------
 begin                : 18.8.2016
 copyright            : (C) 2016 by Matthias Kuhn
 email                : [email protected]
 ***************************************************************************
 *                                                                         *
 *   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 QGSATTRIBUTEEDITORELEMENT_H
#define QGSATTRIBUTEEDITORELEMENT_H

#include "qgis_core.h"
#include "qgsrelation.h"
#include "qgsoptionalexpression.h"

class QgsRelationManager;

class CORE_EXPORT QgsAttributeEditorElement SIP_ABSTRACT
{

#ifdef SIP_RUN
    SIP_CONVERT_TO_SUBCLASS_CODE
    switch ( sipCpp->type() )
    {
      case QgsAttributeEditorElement::AeTypeContainer:
        sipType = sipType_QgsAttributeEditorContainer;
        break;
      case QgsAttributeEditorElement::AeTypeField:
        sipType = sipType_QgsAttributeEditorField;
        break;
      case QgsAttributeEditorElement::AeTypeRelation:
        sipType = sipType_QgsAttributeEditorRelation;
        break;
      default:
        sipType = nullptr;
        break;
    }
    SIP_END
#endif
  public:
    enum AttributeEditorType
    {
      AeTypeContainer, 
      AeTypeField,     
      AeTypeRelation,  
      AeTypeInvalid    
    };

    QgsAttributeEditorElement( AttributeEditorType type, const QString &name, QgsAttributeEditorElement *parent = nullptr )
      : mType( type )
      , mName( name )
      , mParent( parent )
      , mShowLabel( true )
    {}

    virtual ~QgsAttributeEditorElement() = default;

    QString name() const { return mName; }

    AttributeEditorType type() const { return mType; }

    QgsAttributeEditorElement *parent() const { return mParent; }

    QDomElement toDomElement( QDomDocument &doc ) const;

    virtual QgsAttributeEditorElement *clone( QgsAttributeEditorElement *parent ) const = 0 SIP_FACTORY;

    bool showLabel() const;

    void setShowLabel( bool showLabel );

  protected:
#ifndef SIP_RUN
    AttributeEditorType mType;
    QString mName;
    QgsAttributeEditorElement *mParent = nullptr;
    bool mShowLabel;
#endif

  private:

    virtual void saveConfiguration( QDomElement &elem ) const = 0;

    virtual QString typeIdentifier() const = 0;
};


class CORE_EXPORT QgsAttributeEditorContainer : public QgsAttributeEditorElement
{
  public:

    QgsAttributeEditorContainer( const QString &name, QgsAttributeEditorElement *parent )
      : QgsAttributeEditorElement( AeTypeContainer, name, parent )
      , mIsGroupBox( true )
      , mColumnCount( 1 )
    {}


    ~QgsAttributeEditorContainer() override;

    virtual void addChildElement( QgsAttributeEditorElement *element SIP_TRANSFER );

    virtual void setIsGroupBox( bool isGroupBox ) { mIsGroupBox = isGroupBox; }

    virtual bool isGroupBox() const { return mIsGroupBox; }

    QList<QgsAttributeEditorElement *> children() const { return mChildren; }

    virtual QList<QgsAttributeEditorElement *> findElements( AttributeEditorType type ) const;

    void clear();

    void setName( const QString &name );

    int columnCount() const;

    void setColumnCount( int columnCount );

    QgsAttributeEditorElement *clone( QgsAttributeEditorElement *parent ) const override SIP_FACTORY;

    QgsOptionalExpression visibilityExpression() const;

    void setVisibilityExpression( const QgsOptionalExpression &visibilityExpression );

  private:
    void saveConfiguration( QDomElement &elem ) const override;
    QString typeIdentifier() const override;

    bool mIsGroupBox;
    QList<QgsAttributeEditorElement *> mChildren;
    int mColumnCount;
    QgsOptionalExpression mVisibilityExpression;
};

class CORE_EXPORT QgsAttributeEditorField : public QgsAttributeEditorElement
{
  public:

    QgsAttributeEditorField( const QString &name, int idx, QgsAttributeEditorElement *parent )
      : QgsAttributeEditorElement( AeTypeField, name, parent )
      , mIdx( idx )
    {}

    int idx() const { return mIdx; }

    QgsAttributeEditorElement *clone( QgsAttributeEditorElement *parent ) const override SIP_FACTORY;

  private:
    void saveConfiguration( QDomElement &elem ) const override;
    QString typeIdentifier() const override;
    int mIdx;
};

class CORE_EXPORT QgsAttributeEditorRelation : public QgsAttributeEditorElement
{
  public:

    QgsAttributeEditorRelation( const QString &name, const QString &relationId, QgsAttributeEditorElement *parent )
      : QgsAttributeEditorElement( AeTypeRelation, name, parent )
      , mRelationId( relationId )
      , mShowLinkButton( true )
      , mShowUnlinkButton( true )
    {}

    QgsAttributeEditorRelation( const QString &name, const QgsRelation &relation, QgsAttributeEditorElement *parent )
      : QgsAttributeEditorElement( AeTypeRelation, name, parent )
      , mRelationId( relation.id() )
      , mRelation( relation )
      , mShowLinkButton( true )
      , mShowUnlinkButton( true )
    {}

    const QgsRelation &relation() const { return mRelation; }

    bool init( QgsRelationManager *relManager );

    QgsAttributeEditorElement *clone( QgsAttributeEditorElement *parent ) const override SIP_FACTORY;

    bool showLinkButton() const;

    void setShowLinkButton( bool showLinkButton );

    bool showUnlinkButton() const;

    void setShowUnlinkButton( bool showUnlinkButton );


  private:
    void saveConfiguration( QDomElement &elem ) const override;
    QString typeIdentifier() const override;
    QString mRelationId;
    QgsRelation mRelation;
    bool mShowLinkButton;
    bool mShowUnlinkButton;
};


#endif // QGSATTRIBUTEEDITORELEMENT_H