File: qgsrunprocess.h

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/***************************************************************************
                          qgsrunprocess.h

 A class that runs an external program

                             -------------------
    begin                : Jan 2005
    copyright            : (C) 2005 by Gavin Macaulay
    email                : gavin at macaulay dot co dot nz
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 QGSRUNPROCESS_H
#define QGSRUNPROCESS_H

#include <QObject>
#include <QProcess>

class QgsMessageOutput;

/** \ingroup core
 * A class that executes an external program/script.
 * It can optionally capture the standard output and error from the
 * process and displays them in a dialog box.
 */
class CORE_EXPORT QgsRunProcess: public QObject
{
    Q_OBJECT

  public:
    // This class deletes itself, so to ensure that it is only created
    // using new, the Named Consturctor Idiom is used, and one needs to
    // use the create() static function to get an instance of this class.

    // The action argument contains string with the command.
    // If capture is true, the standard output and error from the process
    // will be sent to QgsMessageOuptut - usually a dialog box.
    static QgsRunProcess* create( const QString& action, bool capture )
    { return new QgsRunProcess( action, capture ); }

  public slots:
    void stdoutAvailable();
    void stderrAvailable();
    void processError( QProcess::ProcessError );
    void processExit( int, QProcess::ExitStatus );
    void dialogGone();

  private:
    QgsRunProcess( const QString& action, bool capture );
    ~QgsRunProcess();

    // Deletes the instance of the class
    void die();

    QProcess* mProcess;
    QgsMessageOutput* mOutput;
    QString mCommand;
};

#endif