autoResizeTreeView.h

/***************************************************************************
 *   Copyright (C) 2006 by Graeme Foster                                   *
 *   email    foster.graeme@gmail.com                                      *
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 *   This program 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifndef __AUTORESIZE_TREEVIEW_H
#define __AUTORESIZE_TREEVIEW_H

#include <QTreeView>
#include <QResizeEvent>

#include <iostream>

class gf_AutoResizeTreeView : public QTreeView
{
public: // Enumerated types
        enum gf_growDirection {gf_GD_NONE =0, gf_GD_WIDTH =1, gf_GD_HEIGHT=2, gf_GD_BOTH=3};
        enum gf_growPolicy    {gf_GP_NONE =0, gf_GP_GREEDY = 1, gf_GP_FRIENDLY = 2, gf_GP_STAGGERED = 4};
        enum gf_status        {gf_S_NORMAL, gf_S_GROWING, gf_S_SHRINKING, gf_S_GROWN, gf_S_SHRUNK};

private: // member variables
        gf_AutoResizeTreeView * gf_twin;
        gf_growDirection gf_gd;
        gf_growPolicy gf_gp;
        gf_status status;
        int gf_friendlyMin;
        int gf_shrinkToWidth;
        int gf_shrinkToHeight;
        bool gf_hold;
        

public: // member functions
        gf_AutoResizeTreeView (QWidget * parent = 0);
        void focusInEvent ( QFocusEvent * event );
        void focusOutEvent ( QFocusEvent * event );
        inline void setTwin(gf_AutoResizeTreeView * pTwin){gf_twin = pTwin;}
        inline void setGrowDirection(gf_growDirection  dirn){gf_gd = dirn;}
        void storeSize();
        void restoreSize();
        void setStatus(gf_status s){status = s;}
        gf_status getStatus(){return status;}

        inline void growWidth(int w){if (w>0) resize(width() +w,height());}
        inline void growHeight(int h){if (h>0) resize(width(),height() +h);}
protected:
        virtual void resizeEvent(QResizeEvent * event);

private: // member functions
        void selectGrow();
        void grow(int smallWidth, int smallHeight);
        void staggeredGrow();
        void shrink();
};

#endif

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