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annotate examples/example-cursor.c @ 186:f37b8e95aaaa

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core: add blend routines in texture
author David Demelier <markand@malikania.fr>
date Fri, 06 Nov 2020 11:30:29 +0100
parents 4bbfcd9180a8
children 133926e08d6e
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163
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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 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 <core/clock.h>
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22 #include <core/core.h>
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23 #include <core/event.h>
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24 #include <core/key.h>
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25 #include <core/painter.h>
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26 #include <core/panic.h>
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27 #include <core/sys.h>
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28 #include <core/util.h>
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29 #include <core/window.h>
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30
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31 #include <ui/label.h>
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32 #include <ui/ui.h>
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33
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34 #define W 1280
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35 #define H 720
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36
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37 static char help_text[128];
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38
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39 static struct label help = {
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40 .x = 10,
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41 .y = 10,
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42 .text = help_text,
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43 .flags = LABEL_FLAGS_SHADOW
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44 };
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45
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46 static void
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47 init(void)
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48 {
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49 if (!core_init() || !ui_init())
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50 panic();
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51 if (!window_open("Example - Cursor", W, H))
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52 panic();
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53 }
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54
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55 static void
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56 change(enum window_cursor cursor)
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57 {
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58 static const char *names[] = {
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59 [WINDOW_CURSOR_ARROW] = "WINDOW_CURSOR_ARROW",
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60 [WINDOW_CURSOR_EDIT] = "WINDOW_CURSOR_EDIT",
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61 [WINDOW_CURSOR_WAIT] = "WINDOW_CURSOR_WAIT",
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62 [WINDOW_CURSOR_CROSSHAIR] = "WINDOW_CURSOR_CROSSHAIR",
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63 [WINDOW_CURSOR_SIZE] = "WINDOW_CURSOR_SIZE",
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64 [WINDOW_CURSOR_NO] = "WINDOW_CURSOR_NO",
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65 [WINDOW_CURSOR_HAND] = "WINDOW_CURSOR_HAND"
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66 };
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67
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68 snprintf(help_text, sizeof (help_text), "Keys: <Left>/<Right> to change cursor. Current: %s", names[cursor]);
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69 window_set_cursor(cursor);
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70 }
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71
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72 static void
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73 run(void)
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74 {
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75 struct clock clock = {0};
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76 enum window_cursor cursor = WINDOW_CURSOR_ARROW;
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77
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78 clock_start(&clock);
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79 change(cursor);
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80
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81 for (;;) {
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82 union event ev;
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83 unsigned int elapsed = clock_elapsed(&clock);
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84
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85 clock_start(&clock);
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86
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87 while (event_poll(&ev)) {
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88 switch (ev.type) {
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89 case EVENT_KEYDOWN:
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90 switch (ev.key.key) {
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91 case KEY_LEFT:
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92 if (cursor > 0)
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93 change(--cursor);
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94 break;
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95 case KEY_RIGHT:
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96 if (cursor + 1 < WINDOW_CURSOR_LAST)
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97 change(++cursor);
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98 break;
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99 default:
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100 break;
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101 }
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102
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103
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104 break;
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105 case EVENT_QUIT:
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106 return;
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107 default:
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108 break;
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109 }
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110 }
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111
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112 painter_set_color(0xebede9ff);
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113 painter_clear();
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114 label_draw(&help);
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115 painter_present();
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116
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117 if ((elapsed = clock_elapsed(&clock)) < 20)
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118 delay(20 - elapsed);
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119 }
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120 }
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121
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122 static void
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123 quit(void)
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124 {
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125 window_finish();
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126 ui_finish();
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127 core_finish();
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128 }
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129
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130 int
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131 main(int argc, char **argv)
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132 {
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133 (void)argc;
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134 (void)argv;
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135
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136 init();
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137 run();
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138 quit();
4bbfcd9180a8 core: add window_set_cursor function, closes #2502
David Demelier <markand@malikania.fr>
parents:
diff changeset
139 }
4bbfcd9180a8 core: add window_set_cursor function, closes #2502
David Demelier <markand@malikania.fr>
parents:
diff changeset
140