qgslayertreelayer.h

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/***************************************************************************
  qgslayertreelayer.h
  --------------------------------------
  Date                 : May 2014
  Copyright            : (C) 2014 by Martin Dobias
  Email                : wonder dot sk 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 QGSLAYERTREELAYER_H
#define QGSLAYERTREELAYER_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgslayertreenode.h"
#include "qgsmaplayerref.h"
#include "qgsreadwritecontext.h"
#include "qgslegendpatchshape.h"
 
class QgsMapLayer;
 
class CORE_EXPORT QgsLayerTreeLayer : public QgsLayerTreeNode
{
    Q_OBJECT
  public:
    explicit QgsLayerTreeLayer( QgsMapLayer *layer );
 
#ifndef SIP_RUN
    QgsLayerTreeLayer( const QgsLayerTreeLayer &other );
#endif
 
    explicit QgsLayerTreeLayer( const QString &layerId, const QString &name = QString(), const QString &source = QString(), const QString &provider = QString() );
 
    QString layerId() const { return mRef.layerId; }
 
    QgsMapLayer *layer() const { return mRef.get(); }
 
    QString name() const override;
 
    void setName( const QString &n ) override;
 
    void setUseLayerName( bool use = true );
 
    bool useLayerName() const;
 
    static QgsLayerTreeLayer *readXml( QDomElement &element, const QgsReadWriteContext &context ) SIP_FACTORY;
 
    static QgsLayerTreeLayer *readXml( QDomElement &element, const QgsProject *project, const QgsReadWriteContext &context ) SIP_FACTORY;
 
    void writeXml( QDomElement &parentElement, const QgsReadWriteContext &context ) override;
 
    QString dump() const override;
 
    QgsLayerTreeLayer *clone() const override SIP_FACTORY;
 
    void resolveReferences( const QgsProject *project, bool looseMatching = false ) override;
 
    void setLabelExpression( const QString &expression );
 
    QString labelExpression() const { return mLabelExpression; }
 
    QgsLegendPatchShape patchShape() const;
 
    void setPatchShape( const QgsLegendPatchShape &shape );
 
    QSizeF patchSize() const { return mPatchSize; }
 
    void setPatchSize( QSizeF size ) { mPatchSize = size; }
 
    enum LegendNodesSplitBehavior
    {
      UseDefaultLegendSetting, 
      AllowSplittingLegendNodesOverMultipleColumns, 
      PreventSplittingLegendNodesOverMultipleColumns, 
    };
 
    LegendNodesSplitBehavior legendSplitBehavior() const { return mSplitBehavior; }
 
    void setLegendSplitBehavior( LegendNodesSplitBehavior behavior ) { mSplitBehavior = behavior; }
 
  signals:
 
    void layerLoaded();
 
    void layerWillBeUnloaded();
 
  protected:
    void attachToLayer();
 
    QgsMapLayerRef mRef;
    QString mLayerName;
    QString mLabelExpression;
 
    bool mUseLayerName = true;
 
  private slots:
 
    void layerNameChanged();
 
    void layerWillBeDeleted();
 
  private:
 
#ifdef SIP_RUN
 
    QgsLayerTreeLayer( const QgsLayerTreeLayer &other );
#endif
 
    QgsLegendPatchShape mPatchShape;
    QSizeF mPatchSize;
    LegendNodesSplitBehavior mSplitBehavior = UseDefaultLegendSetting;
 
    QgsLayerTreeLayer &operator=( const QgsLayerTreeLayer & ) = delete;
};
 
 
 
#endif // QGSLAYERTREELAYER_H