title.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) 2022-2026 by CNRS and University of Strasbourg */

 
/*
* This file: 'title.c'
*
* Contains:
*
 
 - The functions to draw the curve title
 
*
* List of functions:
 
  const gchar * default_title (int ax, gpointer data);
 
  void show_title (cairo_t * cr, Curve * this_curve);
 
*/
 
#include <gtk/gtk.h>
#include <cairo.h>
#include <pango/pangocairo.h>
 
#include "global.h"
#include "curve.h"

const gchar * default_title (int ax, gpointer data)
{
  tint * pcc = (tint *)data;
  project * this_proj = get_project_by_id (pcc -> a);
  gchar * freq_unit[5]={" THz", " THz", " MHz", " KHz", " Hz"};
  if (ax == 0)
  {
    int rid = pcc -> b;
    int cid = pcc -> c;
    if (rid == MSD)
    {
      if (this_proj -> tunit > -1)
      {
        return g_strdup_printf ("t [%s]", untime[this_proj -> tunit]);
      }
      else
      {
        return NULL;
      }
    }
    else if (rid == SKT)
    {
      if (cid < this_proj -> skt_sets)
      {
        return g_strdup_printf ("q [&#xC5;<sup>-1</sup>]");
      }
      else
      {
        return g_strdup_printf ("ω %s", freq_unit[this_proj -> tunit]);
      }
    }
    else
    {
      return this_proj -> analysis[rid] -> x_title;
    }
  }
  else
  {
    return get_curve_from_pointer (data) -> name;
  }
}

void show_title (cairo_t * cr, Curve * this_curve)
{
  double x, y;
 
  x = this_curve -> title_pos[0] * resol[0];
  y = this_curve -> title_pos[1] * resol[1];
  cairo_set_source_rgba (cr, this_curve -> title_color.red,
                             this_curve -> title_color.green,
                             this_curve -> title_color.blue,
                             this_curve -> title_color.alpha);
  pango_layout_set_font_description (layout, pango_font_description_from_string (this_curve -> title_font));
  pango_layout_set_markup (layout, this_curve -> title, -1);
  // pango_layout_set_text (layout, this_curve -> title, -1);
  cairo_move_to (cr, x, y);
  pango_cairo_update_layout (cr, layout);
  pango_cairo_show_layout (cr, layout);
  cairo_stroke (cr);
}