frame.c

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/* This file is part of the 'atomes' software
 
'atomes' is free software: you can redistribute it and/or modify it under the terms
of the GNU Affero General Public License as published by the Free Software Foundation,
either version 3 of the License, or (at your option) any later version.
 
'atomes' 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 Affero General Public License along with 'atomes'.
If not, see <https://www.gnu.org/licenses/>
 
Copyright (C) 2022-2024 by CNRS and University of Strasbourg */
 
/*
* This file: 'frame.c'
*
* Contains:
*
 
 - The functions to draw the frame
 
*
* List of functions:
 
  void prep_frame (cairo_t * fr, int da, double ti, ColRGBA dcol);
  void prep_axis_data (project * this_proj, int rid, int cid, int ax);
  void draw_frame (cairo_t * cr, project * this_proj, int rid, int cid);
 
*/
 
#include <stdlib.h>
#include <gdk/gdk.h>
#include <cairo.h>
 
#include "global.h"
#include "curve.h"
 
void prep_frame (cairo_t * fr, int da, double ti, ColRGBA dcol)
{
  curve_dash * tdash;
 
  tdash = selectdash (da);
  cairo_set_dash (fr, tdash -> a, tdash -> b, 0.0);
  cairo_set_source_rgba (fr, dcol.red,  dcol.green,  dcol.blue, dcol.alpha);
  cairo_set_line_width (fr, ti);
  g_free (tdash);
}
 
void show_frame (cairo_t * cd, int tf, int da, int res[2], double ti, double x[2], double y[2], ColRGBA dcol)
{
  double x1, x2;
  double y1, y2;
 
  prep_frame (cd, da, ti, dcol);
  x1 = x[0] * res[0];
  x2 = x[1] * res[0];
  y1 = y[0] * res[1];
  y2 = y[1] * res[1];
  switch (tf)
  {
    case 0:
      cairo_move_to (cd, x1, y2);
      cairo_line_to (cd, x2, y2);
      cairo_line_to (cd, x2, y1);
      cairo_line_to (cd, x1, y1);
      cairo_line_to (cd, x1, y2);
      break;
    case 1:
      cairo_move_to (cd, x1, y2);
      cairo_line_to (cd, x1, y1);
      cairo_line_to (cd, x2, y1);
      cairo_line_to (cd, x2, y2);
      break;
    case 2:
      cairo_move_to (cd, x1, y2);
      cairo_line_to (cd, x1, y1);
      cairo_line_to (cd, x2, y1);
      break;
    case 3:
      cairo_move_to (cd, x2, y2);
      cairo_line_to (cd, x2, y1);
      cairo_line_to (cd, x1, y1);
      break;
    case 4:
      cairo_move_to (cd, x1, y1);
      cairo_line_to (cd, x2, y1);
      break;
  }
  cairo_stroke (cd);
}
 
void prep_axis_data (project * this_proj, int rid, int cid, int ax)
{
  dogrid = this_proj -> curves[rid][cid] -> show_grid[ax];
  x_shift = this_proj -> curves[rid][cid] -> labels_shift_x[ax];
  y_shift = this_proj -> curves[rid][cid] -> labels_shift_y[ax];
  mticks = this_proj -> curves[rid][cid] -> majt[ax];
  nticks = this_proj -> curves[rid][cid] -> mint[ax];
  if (this_proj -> curves[rid][cid] -> ticks_io[ax] == 1)
  {
    amint = this_proj -> curves[rid][cid] -> mint_size[ax];
    amajt = this_proj -> curves[rid][cid] -> majt_size[ax];
  }
  else
  {
    amint = - this_proj -> curves[rid][cid] -> mint_size[ax];
    amajt = - this_proj -> curves[rid][cid] -> majt_size[ax];
  }
  tickpos = this_proj -> curves[rid][cid] -> ticks_pos[ax];
  labpos = this_proj -> curves[rid][cid] -> labels_pos[ax];
}
 
void draw_frame (cairo_t * cr, project * this_proj, int rid, int cid)
{
  show_frame (cr,
              this_proj -> curves[rid][cid] -> frame_type,
              this_proj -> curves[rid][cid] -> frame_dash,
              resol,
              this_proj -> curves[rid][cid] -> frame_thickness,
              this_proj -> curves[rid][cid] -> frame_pos[0],
              this_proj -> curves[rid][cid] -> frame_pos[1],
              this_proj -> curves[rid][cid] -> frame_color);
 
// X axis
 
// Draw X axis ticks and labels
  pango_layout_set_font_description (layout, pango_font_description_from_string (this_proj -> curves[rid][cid] -> labels_font[0]));
  prep_axis_data (this_proj, rid, cid, 0);
  if (this_proj -> curves[rid][cid] -> scale[0] == 0)
  {
    setup_xaxis_linear (cr, this_proj, rid, cid);
  }
  else
  {
    setup_xaxis_log (cr, this_proj, rid, cid, TRUE);
  }
 
// Draw X axis title
  cairo_move_to (cr,
                 x_min  + XDRAW / 2.0 + this_proj -> curves[rid][cid] -> axis_title_x[0],
                 y_min + this_proj -> curves[rid][cid] -> axis_title_y[0]);
  pango_layout_set_font_description (layout, pango_font_description_from_string (this_proj -> curves[rid][cid] -> axis_title_font[0]));
  pango_layout_set_text (layout, this_proj -> curves[rid][cid] -> axis_title[0], -1);
  pango_cairo_update_layout (cr, layout);
  pango_cairo_show_layout (cr, layout);
  cairo_stroke(cr);
 
// Y axis
 
// Draw Y axis ticks and labels
  pango_layout_set_font_description (layout, pango_font_description_from_string (this_proj -> curves[rid][cid] -> labels_font[1]));
  prep_axis_data (this_proj, rid, cid, 1);
  if (this_proj -> curves[rid][cid] -> scale[1] == 0)
  {
    setup_yaxis_linear (cr, this_proj, rid, cid);
  }
  else
  {
    setup_yaxis_log (cr, this_proj, rid, cid, TRUE);
  }
  cairo_move_to (cr,
                  x_min - this_proj -> curves[rid][cid] -> axis_title_x[1],
                  y_min + YDRAW/2 - this_proj -> curves[rid][cid] -> axis_title_y[1]);
  pango_layout_set_font_description (layout, pango_font_description_from_string (this_proj -> curves[rid][cid] -> axis_title_font[1]));
  pango_layout_set_text (layout, this_proj -> curves[rid][cid] -> axis_title[1], -1);
  cairo_rotate (cr, -pi/2.0);
  pango_cairo_update_layout (cr, layout);
  pango_cairo_show_layout (cr, layout);
  cairo_stroke (cr);
  cairo_rotate (cr, pi/2.0);
  pango_cairo_update_layout (cr, layout);
}