PanView.h

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/* Gxsm - Gnome X Scanning Microscopy
 * universal STM/AFM/SARLS/SPALEED/... controlling and
 * data analysis software
 * 
 * Copyright (C) 2003 Kristan Temme
 *
 * Authors: Kristan Temme <etptt@users.sf.net>
 *                                                                                
 * WWW Home: http://gxsm.sf.net
 *
 * 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.
 */

/* -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 8 c-style: "K&R" -*- */

#include <gtk/gtk.h>
#include <gnome.h>
#include <math.h>



#define WINDOW_SIZE   100
#define WINDOW_ORIGIN (WINDOW_SIZE/2)
#define TO_CANVAS_X(var) (WINDOW_ORIGIN + ((var)*(WINDOW_SIZE/max_x)))
#define TO_CANVAS_Y(var) (WINDOW_ORIGIN - ((var)*(WINDOW_SIZE/max_y)))
#define TO_CANVAS_NORMAL_X(var) (WINDOW_ORIGIN + ((var)*WINDOW_SIZE))
#define TO_CANVAS_NORMAL_Y(var) (WINDOW_ORIGIN - ((var)*WINDOW_SIZE))
#define TO_RAD(var) (M_PI * ((var) / 180))

class PanView : public GnomeAppService{
public:

    PanView(GtkWidget *a);
    virtual ~PanView();

    void run ();
    void refresh ();
    void update_expanded_scan_limits ();
    void tip_refresh ();

    void start_tip_monitor ();
    void stop_tip_monitor ();

    gint finish (gint flg = -99) { if (flg != -99) tip_flag = flg; return tip_flag; };

private:  
    guint      timer_id;
    gint       tip_flag;

    GtkWidget  *canvas;

    GnomeCanvasItem   *tip_marker;
    GnomeCanvasItem   *tip_marker_z;
    GnomeCanvasItem   *pan_area;
    GnomeCanvasItem   *pre_current_view;  // scan area with prescan
    GnomeCanvasItem   *current_view;      // scan area without prescan
         
    double point[4][2];       // edges of the scan area
    double pre_point[4][2]; // only x coordinate only important for pre_current_view
                 
    double max_x, min_x;
    double max_y, min_y;
    double max_z, min_z;
    double corn_oo, corn_ii;
 
    void transform(double *dest, double *src, double rot, 
                   double y_off, 
                   double x_off);
         
};

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