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annotate examples/example-cursor/example-cursor.c @ 431:8f59201dc76b

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core: cleanup hierarchy
author David Demelier <markand@malikania.fr>
date Sat, 15 Oct 2022 20:23:14 +0200
parents a5b98db4fd87
children 862b15c3a3ae
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1 /*
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2 * example-cursor.c -- example on how to change cursor
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3 *
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4 * Copyright (c) 2020-2022 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <stdio.h>
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20
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21 #include <mlk/core/core.h>
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22 #include <mlk/core/event.h>
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23 #include <mlk/core/game.h>
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24 #include <mlk/core/key.h>
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25 #include <mlk/core/painter.h>
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26 #include <mlk/core/panic.h>
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27 #include <mlk/core/state.h>
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28 #include <mlk/core/sys.h>
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29 #include <mlk/core/util.h>
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30 #include <mlk/core/window.h>
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31
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32 #include <ui/label.h>
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33 #include <ui/ui.h>
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34
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35 #define W 1280
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36 #define H 720
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37
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38 static struct state *states[1];
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39 static char help_text[128];
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40 static enum window_cursor cursor = WINDOW_CURSOR_ARROW;
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41
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42 static struct label help = {
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43 .x = 10,
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44 .y = 10,
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45 .text = help_text,
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46 .flags = LABEL_FLAGS_SHADOW
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47 };
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48
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49 static void
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50 init(void)
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51 {
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52 if (core_init("fr.malikania", "example-cursor") < 0 || ui_init() < 0)
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53 panic();
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54 if (window_open("Example - Cursor", W, H) < 0)
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55 panic();
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56 }
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57
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58 static void
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59 change(enum window_cursor cursor)
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60 {
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61 static const char *names[] = {
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62 [WINDOW_CURSOR_ARROW] = "WINDOW_CURSOR_ARROW",
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63 [WINDOW_CURSOR_EDIT] = "WINDOW_CURSOR_EDIT",
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64 [WINDOW_CURSOR_WAIT] = "WINDOW_CURSOR_WAIT",
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65 [WINDOW_CURSOR_CROSSHAIR] = "WINDOW_CURSOR_CROSSHAIR",
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66 [WINDOW_CURSOR_SIZE] = "WINDOW_CURSOR_SIZE",
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67 [WINDOW_CURSOR_NO] = "WINDOW_CURSOR_NO",
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68 [WINDOW_CURSOR_HAND] = "WINDOW_CURSOR_HAND"
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69 };
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70
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71 snprintf(help_text, sizeof (help_text), "Keys: <Left>/<Right> to change cursor. Current: %s", names[cursor]);
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72 window_set_cursor(cursor);
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73 }
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74
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75 static void
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76 handle(struct state *st, const union event *ev)
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77 {
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78 (void)st;
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79
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80 switch (ev->type) {
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81 case EVENT_KEYDOWN:
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82 switch (ev->key.key) {
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83 case KEY_LEFT:
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84 if (cursor > 0)
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85 change(--cursor);
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86 break;
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87 case KEY_RIGHT:
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88 if (cursor + 1 < WINDOW_CURSOR_LAST)
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89 change(++cursor);
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90 break;
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91 default:
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92 break;
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93 }
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94
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95
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96 break;
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97 case EVENT_QUIT:
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98 game_quit();
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99 break;
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100 default:
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101 break;
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102 }
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103 }
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104
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105 static void
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106 draw(struct state *st)
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107 {
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108 (void)st;
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109
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110 painter_set_color(0xebede9ff);
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111 painter_clear();
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112 label_draw(&help);
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113 painter_present();
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114 }
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115
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116 static void
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117 run(void)
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118 {
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119 struct state state = {
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120 .handle = handle,
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121 .draw = draw
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122 };
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123
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124 change(cursor);
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125
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126 game_init(states, UTIL_SIZE(states));
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127 game_push(&state);
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128 game_loop();
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129 }
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130
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131 static void
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132 quit(void)
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133 {
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134 window_finish();
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135 ui_finish();
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136 core_finish();
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137 }
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138
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139 int
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140 main(int argc, char **argv)
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141 {
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142 (void)argc;
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143 (void)argv;
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144
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145 init();
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146 run();
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147 quit();
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148 }