uzoom.hpp

/************************************************************************
 *
 *  uzoom.hpp: semantic zooming
 *  Ubit GUI Toolkit - Version 6
 *  (C) 2009 | Eric Lecolinet | TELECOM ParisTech | http://www.enst.fr/~elc/ubit
 *
 * ***********************************************************************
 * COPYRIGHT NOTICE :
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY AND WITHOUT EVEN THE
 * IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 * 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.
 * SEE FILES 'COPYRIGHT' AND 'COPYING' FOR MORE DETAILS.
 * ***********************************************************************/

#ifndef _uzoom_hpp_
#define _uzoom_hpp_ 1
#include <ubit/ucond.hpp>
#include <ubit/ubox.hpp>
#include <ubit/uctlmenu.hpp>
namespace ubit {
  
  class UZoommenu;
  
  class UZoompane : public UBox {
  public:
    UCLASS(UZoompane)
    
    UZoompane(UArgs arglist = UArgs::none);
    
    UBox& viewport() {return *pviewport;}
    
    UPos& viewportPos() {return *ppos;}
    UScale& viewportScale() {return *pscale;}
    UZoommenu& zoommenu() {return *pmenu;}
    void openMenuOn(int event_mask);
    
   private:
    uptr<UBox> pviewport;
    uptr<UZoommenu> pmenu;
    uptr<UPos> ppos;
    uptr<UScale> pscale;
  };
  
  inline UZoompane& uzoompane(UArgs arglist = UArgs::none) {return *new UZoompane(arglist);}


  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  class UZoommenu: public UCtlmenu {
  public:
    UCLASSDEF("UZoommenu", UZoommenu, null)  //  UZoommenu() not defined
    
    UZoommenu(UBox& zoomed_box, UBox& panned_box);
    void openMenuOn(int event_mask);
    virtual void openMenuCB(UMouseEvent&);

  protected:
    uptr<UZoomAction> pzoom_action; 
    uptr<UPanAction> ppan_action;
    int event_mask;
  };
  
  
  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  class UInscale : public UCond {
  public:
    UInscale() : smin(0.), smax(0.) {}
    UInscale(float _smin, float _smax) : smin(_smin), smax(_smax) {}
    
    void  setMin(float _smin) {smin = _smin;}
    void  setMax(float _smax) {smax = _smax;}
    float getMin() const {return smin;}
    float getMax() const {return smax;}
    
    virtual bool verifies(const UUpdateContext&, const UElem&) const;
  private:
    float smin, smax;
  };
  
  inline UInscale& uinscale(float smin, float smax) {return *new UInscale(smin,smax);}
  
}
#endif