File indexing completed on 2024-05-12 04:20:32

 /*
  * SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
  *
  * This file is part of the KD Chart library.
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef __KCHARTDIAGRAMOBSERVER_H_
 #define __KCHARTDIAGRAMOBSERVER_H_
 
 #include "KChartGlobal.h"
 
 #include <QObject>
 #include <QPointer>
 #include <QModelIndex>
 
 QT_BEGIN_NAMESPACE
 class QAbstractItemModel;
 QT_END_NAMESPACE
 
 namespace KChart {
 
     class AbstractDiagram;
 
     /**
      * \brief A DiagramObserver watches the associated diagram for
      * changes and deletion and emits corresponding signals.
      */
     class KCHART_EXPORT DiagramObserver : public QObject
     {
         Q_OBJECT
     public:
        /**
          * Constructs a new observer observing the given diagram.
          */
         explicit DiagramObserver( AbstractDiagram * diagram, QObject* parent = nullptr );
         ~DiagramObserver() override;
 
         const AbstractDiagram* diagram() const;
         AbstractDiagram* diagram();
 
     Q_SIGNALS:
         /** This signal is emitted immediately before the diagram is
           * being destroyed. */
         void diagramDestroyed( KChart::AbstractDiagram* diagram );
         /** Emitted when a diagram is being destroyed, but before its data is invalidated **/
         void diagramAboutToBeDestroyed( KChart::AbstractDiagram* diagram );
         /** This signal is emitted whenever the data of the diagram changes. */
         void diagramDataChanged( KChart::AbstractDiagram* diagram );
         /** This signal is emitted whenever any of the data of the diagram was set (un)hidden. */
         void diagramDataHidden( KChart::AbstractDiagram* diagram );
         /** This signal is emitted whenever the attributes of the diagram change. */
         void diagramAttributesChanged( KChart::AbstractDiagram* diagram );
 
     private Q_SLOTS:
         void slotDestroyed(QObject*);
         void slotAboutToBeDestroyed();
         void slotHeaderDataChanged(Qt::Orientation,int,int);
         void slotDataChanged(QModelIndex,QModelIndex);
         void slotDataChanged();
         void slotDataHidden();
         void slotAttributesChanged();
         void slotAttributesChanged(QModelIndex,QModelIndex);
         void slotModelsChanged();
 
     private:
         void init();
 
         AbstractDiagram*    m_diagram;
         QPointer<QAbstractItemModel> m_model;
         QPointer<QAbstractItemModel> m_attributesmodel;
    };
 }
 
 #endif // KChartDiagramObserver_H