qgsstylemodel.h

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/***************************************************************************
    qgsstylemodel.h
    ---------------
    begin                : September 2018
    copyright            : (C) 2018 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 QGSSTYLEMODEL_H
#define QGSSTYLEMODEL_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgsstyle.h"
#include "qgssymbol.h"
#include <QAbstractItemModel>
#include <QSortFilterProxyModel>
#include <QIcon>
#include <QHash>
 
class QgsSymbol;
 
#ifndef SIP_RUN
 
class CORE_EXPORT QgsAbstractStyleEntityIconGenerator : public QObject
{
    Q_OBJECT
 
  public:
 
    QgsAbstractStyleEntityIconGenerator( QObject *parent );
 
    virtual void generateIcon( QgsStyle *style, QgsStyle::StyleEntity type, const QString &name ) = 0;
 
    void setIconSizes( const QList< QSize > &sizes );
 
    QList< QSize > iconSizes() const;
 
  signals:
 
    void iconGenerated( QgsStyle::StyleEntity type, const QString &name, const QIcon &icon );
 
  private:
 
    QList< QSize > mIconSizes;
 
};
 
#endif
 
class CORE_EXPORT QgsStyleModel: public QAbstractItemModel
{
    Q_OBJECT
 
  public:
 
    enum Column
    {
      Name = 0, 
      Tags, 
    };
 
    enum Role
    {
      TypeRole = Qt::UserRole + 1, 
      TagRole, 
      SymbolTypeRole, 
      IsFavoriteRole, 
      LayerTypeRole, 
      CompatibleGeometryTypesRole, 
    };
 
    explicit QgsStyleModel( QgsStyle *style, QObject *parent SIP_TRANSFERTHIS = nullptr );
 
    QgsStyle *style() { return mStyle; }
 
    QVariant data( const QModelIndex &index, int role ) const override;
    bool setData( const QModelIndex &index, const QVariant &value, int role = Qt::EditRole ) override;
    Qt::ItemFlags flags( const QModelIndex &index ) const override;
    QVariant headerData( int section, Qt::Orientation orientation,
                         int role = Qt::DisplayRole ) const override;
    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;
 
    void addDesiredIconSize( QSize size );
 
    static void setIconGenerator( QgsAbstractStyleEntityIconGenerator *generator ) SIP_SKIP;
 
  private slots:
 
    void onEntityAdded( QgsStyle::StyleEntity type, const QString &name );
    void onEntityRemoved( QgsStyle::StyleEntity type, const QString &name );
    void onEntityChanged( QgsStyle::StyleEntity type, const QString &name );
    void onEntityRename( QgsStyle::StyleEntity type, const QString &oldName, const QString &newName );
    void onTagsChanged( int entity, const QString &name, const QStringList &tags );
    void rebuildSymbolIcons();
    void iconGenerated( QgsStyle::StyleEntity type, const QString &name, const QIcon &icon );
 
  private:
 
    QgsStyle *mStyle = nullptr;
 
    QHash< QgsStyle::StyleEntity, QStringList > mEntityNames;
 
    QList< QSize > mAdditionalSizes;
    mutable std::unique_ptr< QgsExpressionContext > mExpressionContext;
 
    mutable QHash< QgsStyle::StyleEntity, QHash< QString, QIcon > > mIconCache;
 
    static QgsAbstractStyleEntityIconGenerator *sIconGenerator;
    mutable QSet< QString > mPending3dSymbolIcons;
 
    QgsStyle::StyleEntity entityTypeFromRow( int row ) const;
 
    int offsetForEntity( QgsStyle::StyleEntity entity ) const;
 
};
 
class CORE_EXPORT QgsStyleProxyModel: public QSortFilterProxyModel
{
    Q_OBJECT
 
  public:
 
    explicit QgsStyleProxyModel( QgsStyle *style, QObject *parent SIP_TRANSFERTHIS = nullptr );
 
    explicit QgsStyleProxyModel( QgsStyleModel *model, QObject *parent SIP_TRANSFERTHIS = nullptr );
 
    QString filterString() const { return mFilterString; }
 
    QgsStyle::StyleEntity entityFilter() const;
 
    void setEntityFilter( QgsStyle::StyleEntity filter );
 
    void setEntityFilters( const QList<QgsStyle::StyleEntity> &filters ) SIP_SKIP;
 
    bool entityFilterEnabled() const;
 
    void setEntityFilterEnabled( bool enabled );
 
    QgsSymbol::SymbolType symbolType() const;
 
    void setSymbolType( QgsSymbol::SymbolType type );
 
    bool symbolTypeFilterEnabled() const;
 
    void setSymbolTypeFilterEnabled( bool enabled );
 
    QgsWkbTypes::GeometryType layerType() const;
 
    void setLayerType( QgsWkbTypes::GeometryType type );
 
    void setTagId( int id );
 
    int tagId() const;
 
    void setSmartGroupId( int id );
 
    int smartGroupId() const;
 
    bool filterAcceptsRow( int source_row, const QModelIndex &source_parent ) const override;
 
    bool favoritesOnly() const;
 
    void setFavoritesOnly( bool favoritesOnly );
 
    void addDesiredIconSize( QSize size );
 
  public slots:
 
    void setFilterString( const QString &filter );
 
  private:
 
    void initialize();
 
    QgsStyleModel *mModel = nullptr;
    QgsStyle *mStyle = nullptr;
 
    QString mFilterString;
 
    int mTagId = -1;
    QStringList mTaggedSymbolNames;
 
    int mSmartGroupId = -1;
    QStringList mSmartGroupSymbolNames;
 
    bool mFavoritesOnly = false;
 
    bool mEntityFilterEnabled = false;
    QList< QgsStyle::StyleEntity > mEntityFilters = QList< QgsStyle::StyleEntity >() << QgsStyle::SymbolEntity;
 
    bool mSymbolTypeFilterEnabled = false;
    QgsSymbol::SymbolType mSymbolType = QgsSymbol::Marker;
 
    QgsWkbTypes::GeometryType mLayerType = QgsWkbTypes::UnknownGeometry;
 
};
 
#endif //QGSSTYLEMODEL_H