1 // Copyright (C) 2020 Ben Asselstine
2 //
3 // This program is free software; you can redistribute it and/or modify
4 // it under the terms of the GNU General Public License as published by
5 // the Free Software Foundation; either version 3 of the License, or
6 // (at your option) any later version.
7 //
8 // This program is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 // GNU Library General Public License for more details.
12 //
13 // You should have received a copy of the GNU General Public License
14 // along with this program; if not, write to the Free Software
15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
16 // 02110-1301, USA.
17
18 #include <sigc++/functors/mem_fun.h>
19
20 #include <iostream>
21 #include "font-size.h"
22
23 FontSize* FontSize::s_instance = 0;
24
getInstance()25 FontSize* FontSize::getInstance()
26 {
27 if (s_instance == 0)
28 s_instance = new FontSize();
29
30 return s_instance;
31 }
32
deleteInstance()33 void FontSize::deleteInstance()
34 {
35 if (s_instance)
36 delete s_instance;
37
38 s_instance = 0;
39 }
40
FontSize()41 FontSize::FontSize()
42 {
43 calculate_default_font_height_and_width ();
44 }
45
recalculate()46 bool FontSize::recalculate ()
47 {
48 double height = d_height, width = d_width;
49 calculate_default_font_height_and_width ();
50 return d_height != height || d_width != width;
51 }
52
calculate_default_font_height_and_width()53 void FontSize::calculate_default_font_height_and_width ()
54 {
55 Gtk::HBox *box = new Gtk::HBox ();
56 Glib::RefPtr <Pango::Context> cr = box->create_pango_context ();
57 Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (cr);
58 layout->set_text ("A");
59 Pango::Rectangle ink, logical;
60 layout->get_pixel_extents (ink, logical);
61 d_height = ink.get_height ();
62 d_width = ink.get_width ();
63 if (d_height == 0)
64 d_height = 11.0;
65 if (d_width == 0)
66 d_width = 7.0;
67 }
68 // End of file
69