qgscomposerlegend.h

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/***************************************************************************
                         qgscomposerlegend.h  -  description
                         -------------------
    begin                : June 2008
    copyright            : (C) 2008 by Marco Hugentobler
    email                : marco dot hugentobler at karto dot baug dot ethz dot ch
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 QGSCOMPOSERLEGEND_H
#define QGSCOMPOSERLEGEND_H

#include "qgscomposerlegendstyle.h"
#include "qgscomposeritem.h"
#include "qgscomposerlegenditem.h"
#include "qgslegendmodel.h"

class QgsSymbolV2;
class QgsComposerGroupItem;
class QgsComposerLayerItem;
class QgsComposerMap;

class CORE_EXPORT QgsComposerLegend : public QgsComposerItem
{
    Q_OBJECT;

  public:
    QgsComposerLegend( QgsComposition* composition );
    ~QgsComposerLegend();

    virtual int type() const { return ComposerLegend; }

    void paint( QPainter* painter, const QStyleOptionGraphicsItem* itemStyle, QWidget* pWidget );

    QSizeF paintAndDetermineSize( QPainter* painter );

    void adjustBoxSize();

    QgsLegendModel* model() {return &mLegendModel;}

    //setters and getters
    void setTitle( const QString& t ) {mTitle = t;}
    QString title() const {return mTitle;}

    QgsComposerLegendStyle & rstyle( QgsComposerLegendStyle::Style s ) { return mStyleMap[s]; }
    QgsComposerLegendStyle style( QgsComposerLegendStyle::Style s ) const { return mStyleMap.value( s ); }
    void setStyle( QgsComposerLegendStyle::Style s, const QgsComposerLegendStyle style ) { mStyleMap[s] = style; }

    QFont styleFont( QgsComposerLegendStyle::Style s ) const { return style( s ).font(); }
    void setStyleFont( QgsComposerLegendStyle::Style s, const QFont& f );

    void setStyleMargin( QgsComposerLegendStyle::Style s, double margin );
    void setStyleMargin( QgsComposerLegendStyle::Style s, QgsComposerLegendStyle::Side side, double margin );

    double boxSpace() const {return mBoxSpace;}
    void setBoxSpace( double s ) {mBoxSpace = s;}

    double columnSpace() const {return mColumnSpace;}
    void setColumnSpace( double s ) { mColumnSpace = s;}

    QColor fontColor() const {return mFontColor;}
    void setFontColor( const QColor& c ) {mFontColor = c;}

    double symbolWidth() const {return mSymbolWidth;}
    void setSymbolWidth( double w ) {mSymbolWidth = w;}

    double symbolHeight() const {return mSymbolHeight;}
    void setSymbolHeight( double h ) {mSymbolHeight = h;}

    void setWrapChar( const QString& t ) {mWrapChar = t;}
    QString wrapChar() const {return mWrapChar;}

    int columnCount() const { return mColumnCount; }
    void setColumnCount( int c ) { mColumnCount = c;}

    int splitLayer() const { return mSplitLayer; }
    void setSplitLayer( bool s ) { mSplitLayer = s;}

    int equalColumnWidth() const { return mEqualColumnWidth; }
    void setEqualColumnWidth( bool s ) { mEqualColumnWidth = s;}

    void setComposerMap( const QgsComposerMap* map );
    const QgsComposerMap* composerMap() const { return mComposerMap;}

    void updateLegend();

    bool writeXML( QDomElement& elem, QDomDocument & doc ) const;

    bool readXML( const QDomElement& itemElem, const QDomDocument& doc );

  public slots:
    void synchronizeWithModel();
    void invalidateCurrentMap();

  protected:
    QString mTitle;
    QString mWrapChar;

    QColor mFontColor;

    qreal mBoxSpace;
    double mColumnSpace;

    double mSymbolWidth;
    double mSymbolHeight;

    double mlineSpacing;

    int mColumnCount;

    QgsLegendModel mLegendModel;

    const QgsComposerMap* mComposerMap;

    bool mSplitLayer;

    bool mEqualColumnWidth;

  private:
    class Nucleon
    {
      public:
        QgsComposerLegendItem* item;
        // Symbol size size without any space around for symbol item
        QSizeF symbolSize;
        // Label size without any space around for symbol item
        QSizeF labelSize;
        QSizeF size;
        // Offset of symbol label, this offset is the same for all symbol labels
        // of the same layer in the same column
        double labelXOffset;
    };

    class Atom
    {
      public:
        Atom(): size( QSizeF( 0, 0 ) ), column( 0 ) {}
        QList<Nucleon> nucleons;
        // Atom size including nucleons interspaces but without any space around atom.
        QSizeF size;
        int column;
    };

    QList<Atom> createAtomList( QStandardItem* rootItem, bool splitLayer );

    void setColumns( QList<Atom>& atomList );

    QgsComposerLegend(); //forbidden

    QSizeF drawTitle( QPainter* painter = 0, QPointF point = QPointF(), Qt::AlignmentFlag halignment = Qt::AlignLeft );

    QSizeF drawGroupItemTitle( QgsComposerGroupItem* groupItem, QPainter* painter = 0, QPointF point = QPointF() );
    QSizeF drawLayerItemTitle( QgsComposerLayerItem* layerItem, QPainter* painter = 0, QPointF point = QPointF() );

    Nucleon drawSymbolItem( QgsComposerLegendItem* symbolItem, QPainter* painter = 0, QPointF point = QPointF(), double labelXOffset = 0. );

    void drawSymbolV2( QPainter* p, QgsSymbolV2* s, double currentYCoord, double& currentXPosition, double& symbolHeight ) const;

    QSizeF drawAtom( Atom atom, QPainter* painter = 0, QPointF point = QPointF() );

    double spaceAboveAtom( Atom atom );

    QStringList layerIdList() const;

    QStringList splitStringForWrapping( QString stringToSplt );

    QMap<QgsComposerLegendStyle::Style, QgsComposerLegendStyle> mStyleMap;
};

#endif