pancontroller.h

//
//  
//    The Laxkit, a windowing toolkit
//    Please consult http://laxkit.sourceforge.net about where to send any
//    correspondence about this software.
//
//    This library is free software; you can redistribute it and/or
//    modify it under the terms of the GNU Library General Public
//    License as published by the Free Software Foundation; either
//    version 2 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
//    Library General Public License for more details.
//
//    You should have received a copy of the GNU Library General Public
//    License along with this library; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//    Copyright (C) 2004-2010,2012 by Tom Lechner
//
#ifndef _LAX_PAN_CONROLLER_H
#define _LAX_PAN_CONROLLER_H

#include <lax/anobject.h>
#include <lax/anxapp.h>

namespace Laxkit {

 // Setting this lets the whole space to be smaller than the selbox. Otherwise
 // no area of the selbox is allowed to not be a part of the whole space.
#define PANC_ALLOW_SMALL         (1<<0)
 // If the whole space is smaller than the selection rectangle, then
 // selecting CENTER_SMALL causes the space to always be centered within the selbox, rather
 // than allowing the space to be shifted around the selbox.
#define PANC_CENTER_SMALL        (1<<1)
 // Whether the pagesize or element size is absolute in workspace coordinates,
 // or if they are a percent of (start-end).
#define PANC_PAGE_IS_PERCENT     (1<<2)
#define PANC_ELEMENT_IS_PERCENT  (1<<3)
 // whether x and y should scale in a synchronized way
#define PANC_SYNC_XY             (1<<4)

class PanController : virtual public anObject
{
 protected:
    PtrStack<anXWindow> tellstack;
 public:
    anXWindow *donttell;
    unsigned int pan_style;
    int sendstatus;
    long minsel[2],maxsel[2],min[2],max[2],start[2],end[2]; // workspace info, 0=x 1=y
    long pagesize[2],elementsize[2];
    int boxaspect[2];
    double pixelaspect;  // =pixw/pixh

    PanController();
    PanController(const PanController &pan);
    PanController& operator=(PanController &pan);
    PanController(long xmin,long xmax,long xstart,long xend,
                  long ymin,long ymax,long ystart,long yend,
                  int w,int h,unsigned long panstyle=PANC_ELEMENT_IS_PERCENT|PANC_PAGE_IS_PERCENT);
    virtual ~PanController();
    virtual long SetPageSize(int which,long nps);
    virtual long GetPageSize(int which);
    virtual double GetMagToBox(int which,int boxwidth,long *wholestartret,long *wholeendret);
    virtual double GetMagToWhole(int which,int trackwidth,long *boxstartret,long *boxendret);
    virtual void SetSelBounds(int which, long small,long big);
    virtual void SetPixelAspect(double npixaspect=1.0);
    virtual double findpixelaspect();
    virtual void SetBoxAspect(int w,int h);
    virtual int SetWholebox(long xmin,long xmax,long ymin,long ymax);
    virtual int SetStuff(int which,long nmin,long nmax,long nps,long nes,long posstart,long posend);
    virtual int SetSize(int which, long nmin,long nmax,long nps);
    virtual long GetCurPos(int which,long *curpos=NULL,long *curposend=NULL);
    virtual long SetCurPos(int which,long pos);
    virtual long SetCurPos(int which,long poss,long pose);
    virtual int validateSelbox(int which=3);
    virtual int adjustSelbox(int which=2,char validatetoo=1);

    virtual int Center(int which=3);
    virtual long Shift(int which,long d, long wholelen=0, long boxlen=0);
    virtual int ShiftEnd(int which,long d,int center=0,long wholelen=0,long boxlen=0);
    virtual int ShiftStart(int which,long ds,int center=0,long wholelen=0,long boxlen=0);

    virtual long OneUp(int which);
    virtual long OneDown(int which);
    virtual long PageUp(int which,int numpages=1);
    virtual long PageDown(int which,int numpages=1);

    virtual void sendMessages();
    virtual void tell(anXWindow *win);
    virtual void tellPop(anXWindow *win=NULL);
    virtual void dontTell(anXWindow *win);
};

} // namespace Laxkit

#endif