qgslayoutmodel.h

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/***************************************************************************
                         qgslayoutmodel.h
                         ----------------
    begin                : October 2017
    copyright            : (C) 2017 by Nyall Dawson
    email                : nyall dot dawson at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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 QGSLAYOUTMODEL_H
#define QGSLAYOUTMODEL_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgslayoutitemregistry.h"
 
#include <QAbstractItemModel>
#include <QSortFilterProxyModel>
#include <QStringList>
#include <QSet>
 
class QgsLayout;
class QGraphicsItem;
class QgsLayoutItem;
 
class CORE_EXPORT QgsLayoutModel: public QAbstractItemModel
{
    Q_OBJECT
 
  public:
 
    enum Columns
    {
      Visibility = 0, 
      LockStatus, 
      ItemId, 
    };
 
    explicit QgsLayoutModel( QgsLayout *layout, QObject *parent SIP_TRANSFERTHIS = nullptr );
 
    //reimplemented QAbstractItemModel methods
    QModelIndex index( int row, int column, const QModelIndex &parent = QModelIndex() ) const override;
    QModelIndex parent( const QModelIndex &index ) const override;
    int rowCount( const QModelIndex &parent = QModelIndex() ) const override;
    int columnCount( const QModelIndex &parent = QModelIndex() ) const override;
    QVariant data( const QModelIndex &index, int role ) const override;
    Qt::ItemFlags flags( const QModelIndex &index ) const override;
    bool setData( const QModelIndex &index, const QVariant &value, int role ) override;
    QVariant headerData( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const override;
    Qt::DropActions supportedDropActions() const override;
    QStringList mimeTypes() const override;
    QMimeData *mimeData( const QModelIndexList &indexes ) const override;
    bool dropMimeData( const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent ) override;
    bool removeRows( int row, int count, const QModelIndex &parent = QModelIndex() ) override;
 
#ifndef SIP_RUN
 
    void clear();
 
    int zOrderListSize() const;
 
    void rebuildZList();
 
    void addItemAtTop( QgsLayoutItem *item );
 
    void removeItem( QgsLayoutItem *item );
 
    bool reorderItemUp( QgsLayoutItem *item );
 
    bool reorderItemDown( QgsLayoutItem *item );
 
    bool reorderItemToTop( QgsLayoutItem *item );
 
    bool reorderItemToBottom( QgsLayoutItem *item );
 
    QgsLayoutItem *findItemAbove( QgsLayoutItem *item ) const;
 
    QgsLayoutItem *findItemBelow( QgsLayoutItem *item ) const;
 
    QList<QgsLayoutItem *> &zOrderList();
 
    void setItemRemoved( QgsLayoutItem *item );
 
#if 0
 
    void setItemRestored( QgsComposerItem *item );
#endif
 
    void updateItemDisplayName( QgsLayoutItem *item );
 
    void updateItemLockStatus( QgsLayoutItem *item );
 
    void updateItemVisibility( QgsLayoutItem *item );
 
    void updateItemSelectStatus( QgsLayoutItem *item );
#endif
 
    QgsLayoutItem *itemFromIndex( const QModelIndex &index ) const;
 
    QModelIndex indexForItem( QgsLayoutItem *item, int column = 0 );
 
  public slots:
 
#ifndef SIP_RUN
 
    void setSelected( const QModelIndex &index );
#endif
 
  private:
 
    QList<QgsLayoutItem *> mItemZList;
 
    QList<QgsLayoutItem *> mItemsInScene;
 
    QgsLayout *mLayout = nullptr;
 
    void refreshItemsInScene();
 
    void rebuildSceneItemList();
 
    friend class TestQgsLayoutModel;
    friend class TestQgsLayoutGui;
};
 
 
class CORE_EXPORT QgsLayoutProxyModel: public QSortFilterProxyModel
{
    Q_OBJECT
 
  public:
 
    QgsLayoutProxyModel( QgsLayout *layout, QObject *parent SIP_TRANSFERTHIS = nullptr );
 
    QgsLayoutItemRegistry::ItemType filterType() const { return mItemTypeFilter; }
 
    void setFilterType( QgsLayoutItemRegistry::ItemType filter );
 
    void setExceptedItemList( const QList< QgsLayoutItem * > &items );
 
    QList< QgsLayoutItem * > exceptedItemList() const { return mExceptedList; }
 
    QgsLayoutModel *sourceLayerModel() const { return static_cast< QgsLayoutModel * >( sourceModel() ); }
 
    QgsLayoutItem *itemFromSourceIndex( const QModelIndex &sourceIndex ) const;
 
    QgsLayout *layout() { return mLayout; }
 
    void setAllowEmptyItem( bool allowEmpty );
 
    bool allowEmptyItem() const;
 
  protected:
    bool filterAcceptsRow( int sourceRow, const QModelIndex &sourceParent ) const override;
    bool lessThan( const QModelIndex &left, const QModelIndex &right ) const override;
 
  private:
    QgsLayout *mLayout = nullptr;
    QgsLayoutItemRegistry::ItemType mItemTypeFilter;
    QList< QgsLayoutItem * > mExceptedList;
    bool mAllowEmpty = false;
 
};
 
 
 
#endif //QGSLAYOUTMODEL_H