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annotate examples/dsl/screen.h @ 16:f9e4689b837d

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Some minor updates for 15 years later.
author David A. Holland
date Tue, 31 May 2022 01:45:26 -0400
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1 /*****
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2
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3 AnaGram Programming Examples
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4
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5 A Dos Script Language
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6 Screen Control Class Definitions
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7
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8 Copyright 1993 Parsifal Software. All Rights Reserved.
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9
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10 This software is provided 'as-is', without any express or implied
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11 warranty. In no event will the authors be held liable for any damages
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12 arising from the use of this software.
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13
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14 Permission is granted to anyone to use this software for any purpose,
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15 including commercial applications, and to alter it and redistribute it
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16 freely, subject to the following restrictions:
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17
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18 1. The origin of this software must not be misrepresented; you must not
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19 claim that you wrote the original software. If you use this software
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20 in a product, an acknowledgment in the product documentation would be
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21 appreciated but is not required.
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22 2. Altered source versions must be plainly marked as such, and must not be
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23 misrepresented as being the original software.
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24 3. This notice may not be removed or altered from any source distribution.
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25
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26 *****/
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27
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28 #ifndef SCREEN_H
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29 #define SCREEN_H
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30
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31 #include "pair.h"
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32
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33 #define COLOR(fg,bg) (((bg & 0xf) << 4) | (fg & 0xf))
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34
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35 #ifdef __386__
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36 #define INT int386
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37 #define COLOR_ADAPTER_ADDRESS 0XB8000
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38 #else
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39 #define INT int86
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40 #define COLOR_ADAPTER_ADDRESS 0XB8000000
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41 #endif
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42
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43
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44 // char_cell class
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45
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46 class char_cell {
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47 public:
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48 unsigned char data, color;
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49 char_cell() {data = color = 0;}
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50 char_cell(int d, int c) {
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51 data = (unsigned char) d, color = (unsigned char) c;
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52 }
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53 char_cell(int d, int fg, int bg) {
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54 data = (unsigned char) d, color = (unsigned char) COLOR(fg,bg);
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55 }
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56 char_cell &operator = (int d) {
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57 data = (unsigned char) d;
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58 return *this;
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59 }
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60 };
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61
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62
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63 // Protect Display
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64
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65 class protect_display {
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66 char_cell *p;
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67 unsigned n;
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68 pair<int> cursor_position;
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69 public:
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70 protect_display();
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71 ~protect_display();
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72 };
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73
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74
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75 // Screen Rectangle class
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76
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77 class screen_rect{
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78 public:
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79 pair <int> pos, size; // position and size of screen_rect
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80 pair <int> jm; // justification mode
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81
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82 // No constructors or destructors defined
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83
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84 // Build a screen rectangle at absolute coordinates
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85 friend screen_rect at(int, int, int);
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86
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87 // Build a screen rectangle at relative coordinates
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88 screen_rect at(int,int,int = 0);
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89
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90 // Build a single line rectange at absolute coordinates
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91 friend screen_rect line(int, int, int, int /*= 0*/);
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92
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93 // Build a single line rectangle at relative coordinates
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94 screen_rect line(int,int,int,int = 0) const;
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95
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96 // Read the contents of a screen rectangle
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97 friend char_cell *contents(const screen_rect &);
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98
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99 // Set the contents of a screen rectangle
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100 screen_rect &operator << (const char_cell *);
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101
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102 // Build a sub-rectangle of given width, depth
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103 screen_rect rect(int w, int d, int jm = 11);
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104
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105 // Draw a box around a screen rectangle
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106 friend screen_rect box(screen_rect);
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107
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108 // Display data in rectangle
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109 screen_rect &operator << (const char_cell &p);
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110 screen_rect &operator << (const int);
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111 screen_rect &operator << (const char *s);
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112
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113 // Tint a rectangle
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114 screen_rect &tint(int color);
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115 screen_rect &tint(int fg, int bg);
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116
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117 // Set cursor relative to rectangle
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118 screen_rect &set_cursor(const int = 0, const int = 0);
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119 };
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120
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121 screen_rect at(int, int, int = 0);
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122
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123 #endif