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/*
* datamodel.h
*
* (c) 2010 by Jeremy Bowman <jmbowman@alum.mit.edu>
*
* 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.
*/
/** @file datamodel.h
* Header file for DataModel
*/
#ifndef DATAMODEL_H
#define DATAMODEL_H
#include <QAbstractTableModel>
#include <QObject>
class Database;
class View;
/**
* Data model for the currently-displayed subset of the main data table in
* a %PortaBase file. Used to optimize access to that table from Qt views,
* like the main data grid widget.
*/
class DataModel: public QAbstractTableModel
{
Q_OBJECT
public:
DataModel(QObject *parent=0);
int rowCount(const QModelIndex &parent=QModelIndex()) const;
int columnCount(const QModelIndex &parent=QModelIndex()) const;
QVariant data(const QModelIndex &index, int role=Qt::DisplayRole) const;
QVariant headerData(int section, Qt::Orientation orientation,
int role=Qt::DisplayRole) const;
void toggleSort(int column);
Database *database();
void setDatabase(Database *dbase);
View *view();
void setView(const QString &name, bool applyDefaults, bool midReset=false);
void closeView();
void saveViewSettings();
void setRowsPerPage(int rowsPerPage);
int page();
void setPage(int p);
void setSorting(const QString &name);
void setFilter(const QString &name);
void addRow(int rowId);
void editRow(int rowId, int oldIndex=-1);
void deleteRow(int rowId);
void deleteAllRows();
void toggleBoolean(const QModelIndex &index);
void refresh();
signals:
void paginationChanged(int currentPage, int totalPages);
void viewLoaded(View *v);
protected:
void beginResetModel();
void endResetModel();
private:
void processPaginationChange(bool midReset=false);
void processRowRemoval(int oldIndex, int omit=-1);
private:
Database *db; /**< The database currently in use */
View *currentView; /**< The current data view */
int rpp; /**< The current number of rows per page; may not have been saved to the View yet */
int currentPage; /**< The currently displayed page (0 if not using pagination) */
};
#endif // DATAMODEL_H
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