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 #pragma once 19 #ifndef FONT_SIZE_H 20 #define FONT_SIZE_H 21 22 #include <map> 23 #include <gtkmm.h> 24 25 //! A utility class to get the height of the font 26 /** 27 * we need to know how tall a font is so that we can properly size 28 * some buttons and graphics later on. 29 * 30 */ 31 class FontSize 32 { 33 public: 34 //! Returns the singleton instance. Creates a new one if required. 35 static FontSize* getInstance(); 36 37 //! Explicitly deletes the singleton instance. 38 static void deleteInstance(); 39 40 //! Return the height of the default font in pixels. get_height()41 double get_height () { return d_height; } 42 43 //! Return the width in pixels of one character in the default font. get_width()44 double get_width () { return d_width; } 45 46 //! Return true if it changed. 47 bool recalculate (); 48 49 protected: 50 51 // Constructor. 52 FontSize(); 53 54 //! Destructor. ~FontSize()55 ~FontSize() {}; 56 57 private: 58 59 //! Calculate the height of the default font in pixels. 60 void calculate_default_font_height_and_width (); 61 62 // DATA 63 double d_height; 64 double d_width; 65 66 static FontSize * s_instance; 67 }; 68 69 #endif // FONT_SIZE_H 70 71 // End of file 72