src/app/qgsattributetable.h

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/***************************************************************************
                          qgsattributetable.h  -  description
                             -------------------
    begin                : Sat Nov 23 2002
    copyright            : (C) 2002 by Gary E.Sherman
    email                : sherman at mrcc dot com
        Romans 3:23=>Romans 6:23=>Romans 5:8=>Romans 10:9,10=>Romans 12
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
/* $Id: qgsattributetable.h 9138 2008-08-23 21:37:31Z jef $ */
#ifndef QGSATTRIBUTETABLE_H
#define QGSATTRIBUTETABLE_H

#include "qgsattributeaction.h"
#include "qgsvectorlayer.h"
#include "qgsfield.h"

#include <QItemDelegate>
#include <QTableWidget>

#include <set>

class QgsAttributeTable;

class QgsAttributeTableItemDelegate: public QItemDelegate
{
    Q_OBJECT

  public:
    QgsAttributeTableItemDelegate( QgsAttributeTable *table, QObject * parent = 0 );
    QWidget * createEditor( QWidget * parent, const QStyleOptionViewItem & option, const QModelIndex & index ) const;

  private:
    QgsAttributeTable *mTable;
};

class QgsAttributeTable : public QTableWidget
{
    Q_OBJECT

  public:
    QgsAttributeTable( QWidget * parent = 0 );
    ~QgsAttributeTable();

    enum
    {
      AttributeIndex = Qt::UserRole,
      AttributeName = Qt::UserRole + 1,
      AttributeType = Qt::UserRole + 2
    };

    void setReadOnly( bool b );
    void setColumnReadOnly( int col, bool ro );

    /* Inserts the feature with the specified id into rowIdMap. This function has to be called
       (e.g. from QgsShapeFileLayer) when a row is inserted into the table */
    void insertFeatureId( int id, int row );
    void selectRowWithId( int id );
    void sortColumn( int col, bool ascending );
    /* Use this to give this class the current attribute actions,
       which are used when the user requests a popup menu */
    void setAttributeActions( const QgsAttributeAction& actions )
    { mActions = actions; }
    bool edited() const {return mEdited;}
    void setEditable( bool enabled ) {mEditable = enabled;}

    void copySelectedRows();

    void bringSelectedToTop();
    void selectRowsWithId( const QgsFeatureIds& ids );
    void showRowsWithId( const QgsFeatureIds& ids );
    void showAllRows();

    void fillTable( QgsVectorLayer *layer );
    void addAttribute( int idx, const QgsField &fld );
    void deleteAttribute( int idx );

  public slots:
    void columnClicked( int col );
    void rowClicked( int row );

    // Called when the user chooses an item on the popup menu
    void popupItemSelected( QAction * menuAction );

    void attributeValueChanged( int fid, int idx, const QVariant &value );
    void featureDeleted( int fid );

  protected slots:
    void handleChangedSelections();

  protected:
    bool lockKeyPressed;
    QMap<int, int> rowIdMap;
    QMap<int, int> mAttrIdxMap;
    bool mEditable;
    bool mEdited;

    std::set<int> mLastSelectedRows;

    /* Compares the content of two cells either alphanumeric or numeric.
       If 'ascending' is true, -1 means s1 is less, 0 equal, 1 greater.
       If 'ascending' is false, -1 means s1 is more, 0 equal, 1 greater.
       This method is used mainly to sort a column*/
    int compareItems( QString s1, QString s2, bool ascending, bool alphanumeric );
    void keyPressEvent( QKeyEvent* ev );
    void keyReleaseEvent( QKeyEvent* ev );
    void qsort( int lower, int upper, int col, bool ascending, bool alphanumeric );
    void contextMenuEvent( QContextMenuEvent* event );
    void removeAttrColumn( const QString& name );
    void putFeatureInTable( int row, const QgsFeature& fet );
    void mouseReleaseEvent( QMouseEvent* e );
    bool checkSelectionChanges();

  signals:
    void selected( int, bool );
    void selectionRemoved( bool );
    void repaintRequested();

  private:
    void swapRows( int row1, int row2 );

    // Data to do with providing a popup menu of actions that
    std::vector<std::pair<QString, QString> > mActionValues;
    int mClickedOnValue;
    QMenu* mActionPopup;
    QgsAttributeAction mActions;

    QgsAttributeTableItemDelegate *mDelegate;

    // Track previous columm for QTableView sortIndicator wrong direction workaround
    int mPreviousSortIndicatorColumn;

    QgsVectorLayer *mLayer;
};

#endif

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