VRS - The Virtual Rendering System

version 3.3

progressbar.h

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/******************************************************************************
 * VRS - The Virtual Rendering System
 * Copyright (C) 2000-2008 Computer Graphics Systems Group at the 
 * Hasso-Plattner-Institute (HPI), Potsdam, Germany.
 *
 * This  library  is  free  software; you can redistribute it and/or  modify it
 * under the terms of the GNU Lesser General Public  License  as  published  by
 * the  Free  Software  Foundation;  either  version 2.1 of the License, or (at
 * your option) any later version. This library  is  distributed  in  the  hope
 * that  it will be useful, but  WITHOUT ANY WARRANTY; without even the implied
 * warranty of  MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE.  See  the
 * GNU Lesser General Public License for more details. You should have received
 * a copy of the GNU Lesser+ General Public License along with this library; if
 * not, write to the FreeSoftware Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA, 02111-1307, USA.
 ******************************************************************************/

#ifndef VRS_PROGRESSBAR_H
#define VRS_PROGRESSBAR_H

#include <vrs/sharedobj.h>
#include <vector>

namespace VRS {

    class Progress;

    class VRS_CORE_API ProgressBar :
        public VRS::SharedObj
    {
    public:
        static void push(ProgressBar* progressBar);
        static ProgressBar* top();
        static void pop();
    private:
        virtual void show() = 0;
        virtual void hide() = 0;
        virtual bool progress(const std::vector<Progress*>& progresses) = 0;
        virtual double updateFrequency() const { return 2.0; }
        virtual double showDelay() const { return 2.0; }

        virtual void finish(const std::vector<Progress*>& progresses) { };

    protected:
        friend class Progress;

        // only called from class Progress
        static void showBar();
        static bool updateBar(
            const std::vector<Progress*>& progresses,
            bool forceUpdate,
            bool forceShow
        );
        static void hideBar();

        static void finishBar(const std::vector<Progress*>& progresses);
    }; // class ProgressBar

} // namespace VRS

#endif // VRS_PROGRESSBAR_H

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