ZtTablet.H

/* ZtTablet.H */
/* $Id: ZtTablet.H,v 1.7 2006/11/23 10:42:13 vlad Exp $ */
#ifndef __ZtTablet_H
#define __ZtTablet_H

#include <zm/ZtObject.H>


/*************************************************************
 * Object for selecting points in the rectangular area.
 * Useful for selection point, marking ends of line, etc.
 * Don't forget to set_foreground("somecolor")!  Otherwise
 * cross will be invisible.
 *************************************************************/
class ZtTablet : public ZtObject
{
private:

  ZPoint    prev;       /* coords of previously drawn point */

  void  construct ();       /* Common parts of constructors */

protected:

  int       button_id;  /* what button was pressed? */

  Logic     drawn;      /* TRUE if rubber cross is visible */

  Logic     track_motion;   /* TRUE if need call motion() */

  /* Draw cross of one or two lines to provide more visibility. */
  void      draw_rubber_cross (ZPoint p);

public:

  /* Both dimentional tablet: rubber cross pointer */
  ZtTablet (ZtMain* pManager,
        ZGroupId pxid, ZGroupId pyid,
        ZGroupId nxid, ZGroupId nyid);

  /* One dimentional tablet: rubber line pointer */
  ZtTablet (ZtMain* pManager,
        ZGroupId pxid, ZGroupId pyid,
        ZDimension dim, ZGroupId nid);

  /* Setup motion tracking (turn on/off) */
  void      set_motion_tracking (Logic turn);

  /* Get motion tracking) */
  Logic     get_motion_tracking () const;


  /* Callback for end of selection */
  virtual void  point (float nx, float ny);

  /* Callback for motion tracking */
  virtual void  motion (float nx, float ny);


  /* Event processing status:
     ziProcessed - if event processing has been finished (ungrab input);
     ziGrabInput - if event processing must be continued (grab input);
     ziSkipped - if this event is not processed. */
  virtual ZInputStatus  input (const XEvent* xev);

  /* Direct draw procedure: if size, place or parameters are changed */
  virtual void      redraw ();

  /* Check for end of selection.  Button1 release by default.
     Return point of event if success. */
  virtual Logic     check_point (const XEvent* xev, ZPoint& p);

  virtual const char*   class_id () const;

};


#endif /* ZtTablet.H */