root/trunk/FRII/gui/_PairMapCanvas.hh

/*
 * This file is part of the FamilyRelations II source distribution.
 *
 * FamilyRelations II is part of the FamilyJewels package for comparative
 * sequence analysis: http://family.caltech.edu/.
 *
 * Contact author: C. Titus Brown, titus@caltech.edu.
 *
 * This program and all associated source code files are Copyright (C) 2003,
 * 2004 the California Institute of Technology, Pasadena, CA, 91125 USA.  It
 * is under the Lesser GNU Public License; please see the included
 * LICENSE.txt file for more information, or contact Titus directly.
 *
 */

// A subclass of _Canvas used by PairMappingView.  See PairMappingView.* for
// more information.

#ifndef _PAIRMAPCANVAS_HH
#define _PAIRMAPCANVAS_HH

#include "_Canvas.hh"

namespace gui {
  class _PairMapCanvas : public _Canvas {
  private:
    int _top_x, _top_w, _top_y;
    int _bot_x, _bot_w, _bot_y;

    int _top_start, _top_end;
    int _bot_start, _bot_end;

    // Scale factors, computed by 'recompute'.
    float _top_scale, _bot_scale;
    
    // Calculate scale factors.
    void recompute();
  public:
    _PairMapCanvas() {
      _top_x = _top_w = _top_y = _top_start = _top_end = -1;
      _bot_x = _bot_w = _bot_y = _bot_start = _bot_end = -1;
    }

    // Set top/bot canvas coordinates.
    void set_top_canvas_coords(int x_start, int width, int y);
    void set_bot_canvas_coords(int x_start, int width, int y);

    // Set top/bot sequence coordinates.
    void set_top_sequence_coords(int start, int end);
    void set_bot_sequence_coords(int start, int end);

    // Get sequence coords.
    const int get_top_start() const { return _top_start; }
    const int get_bot_start() const { return _bot_start; }
    const int get_top_end() const { return _top_end; }
    const int get_bot_end() const { return _bot_end; }

    // draw a feature between positions on top and bottom, with or without
    // a width.
    void draw_feature(int top_pos, int bot_pos, unsigned int width,
                      int orientation);
    void draw_feature(int top_pos, int bot_pos);

    void push_clip();
  };
}

#endif // _PAIRMAPCANVAS_HH