Mercurial > molko
annotate libui/ui/gridmenu.c @ 235:fb304a94a05c
rpg: prepare equipment
author | David Demelier <markand@malikania.fr> |
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date | Thu, 26 Nov 2020 18:00:45 +0100 |
parents | 4ad7420ab678 |
children | 76afe639fd72 |
rev | line source |
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1 /* |
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2 * gridmenu.c -- GUI grid menu |
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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 <assert.h> |
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20 #include <string.h> |
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21 |
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22 #include <core/event.h> |
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23 #include <core/maths.h> |
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24 #include <core/painter.h> |
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25 #include <core/panic.h> |
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26 #include <core/texture.h> |
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27 #include <core/trace.h> |
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28 |
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29 #include "frame.h" |
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30 #include "label.h" |
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31 #include "gridmenu.h" |
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32 #include "theme.h" |
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33 |
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34 #define THEME(m) ((m)->theme ? (m)->theme : theme_default()) |
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35 |
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36 struct index { |
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37 unsigned int row; |
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38 unsigned int col; |
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39 }; |
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40 |
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41 static struct index |
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42 get_index(const struct gridmenu *menu) |
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43 { |
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44 return (struct index) { |
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45 .row = menu->selected / menu->ncols, |
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46 .col = menu->selected % menu->ncols |
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47 }; |
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48 } |
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49 |
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50 static void |
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51 positionate(struct gridmenu *menu) |
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52 { |
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53 const struct theme *theme = THEME(menu); |
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54 struct gridmenu_texture *gtex = &menu->tex; |
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55 unsigned int vreq, hreq; |
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56 |
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57 /* Compute which item has the bigger width to create a spacing. */ |
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58 for (size_t i = 0; i < GRIDMENU_ENTRY_MAX; ++i) { |
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59 unsigned int lw, lh; |
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60 |
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61 gtex->labels[i].theme = theme; |
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62 gtex->labels[i].flags = LABEL_FLAGS_SHADOW; |
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63 |
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64 if (!(gtex->labels[i].text = menu->menu[i])) |
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65 continue; |
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66 |
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67 label_query(>ex->labels[i], &lw, &lh); |
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68 gtex->eltw = lw > gtex->eltw ? lw : gtex->eltw; |
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69 gtex->elth = lh > gtex->elth ? lh : gtex->elth; |
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70 } |
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71 |
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72 vreq = (theme->padding * 2) + (gtex->elth * menu->nrows); |
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73 hreq = (theme->padding * 2) + (gtex->eltw * menu->ncols); |
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74 |
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75 /* Compute spacing between elements. */ |
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76 if (hreq > menu->w) { |
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77 tracef("gridmenu width is too small: %u < %u", menu->w, vreq); |
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78 gtex->spaceh = 1; |
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79 } else { |
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80 hreq -= theme->padding * 2; |
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81 gtex->spaceh = (menu->w - hreq) / menu->ncols; |
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82 } |
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83 |
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84 if (vreq > menu->h) { |
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85 tracef("gridmenu height is too small: %u < %u", menu->h, vreq); |
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86 gtex->spacev = 1; |
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87 } else { |
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88 vreq -= theme->padding * 2; |
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89 gtex->spacev = (menu->h - vreq) / menu->nrows; |
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90 } |
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91 |
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92 /* This is the whole height. */ |
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93 gtex->relh = theme->padding * 2; |
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94 gtex->relh += gtex->elth * (GRIDMENU_ENTRY_MAX / menu->ncols); |
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95 gtex->relh += gtex->spacev * (GRIDMENU_ENTRY_MAX / menu->ncols); |
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96 } |
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97 |
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98 static void |
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99 repaint_frame(struct gridmenu *menu) |
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100 { |
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101 const struct frame f = { |
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102 .x = 0, |
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103 .y = menu->tex.rely, |
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104 .w = menu->w, |
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105 .h = menu->h, |
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106 .theme = menu->theme, |
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107 }; |
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108 |
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109 frame_draw(&f); |
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110 } |
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111 |
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112 static void |
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113 repaint_labels(struct gridmenu *menu) |
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114 { |
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115 struct theme theme; |
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116 unsigned int r = 0, c = 0; |
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117 |
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118 /* Copy theme to change color if selected. */ |
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119 theme_shallow(&theme, THEME(menu)); |
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120 |
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121 for (size_t i = 0; i < GRIDMENU_ENTRY_MAX; ++i) { |
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122 struct label *l = &menu->tex.labels[i]; |
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123 |
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124 if (i == menu->selected) |
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125 theme.colors[THEME_COLOR_NORMAL] = THEME(menu)->colors[THEME_COLOR_SELECTED]; |
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126 else |
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127 theme.colors[THEME_COLOR_NORMAL] = THEME(menu)->colors[THEME_COLOR_NORMAL]; |
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128 |
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129 l->theme = &theme; |
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130 l->x = theme.padding + (c * menu->tex.eltw) + (c * menu->tex.spaceh); |
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131 l->y = theme.padding + (r * menu->tex.elth) + (r * menu->tex.spacev); |
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132 |
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133 if (++c >= menu->ncols) { |
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134 ++r; |
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135 c = 0; |
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136 } |
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137 |
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138 if (l->text) |
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139 label_draw(l); |
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140 } |
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141 } |
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142 |
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143 static void |
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144 repaint(struct gridmenu *menu) |
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145 { |
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146 struct texture *tex = &menu->tex.texture; |
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147 |
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148 if (!texture_ok(tex) && !texture_new(tex, menu->w, menu->tex.relh)) |
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149 panic(); |
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150 |
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151 PAINTER_BEGIN(tex); |
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152 |
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153 painter_clear(); |
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154 repaint_frame(menu); |
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155 repaint_labels(menu); |
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156 |
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157 PAINTER_END(); |
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158 } |
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159 |
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160 static void |
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161 zoom(struct gridmenu *menu) |
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162 { |
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163 struct gridmenu_texture *tex = &menu->tex; |
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164 struct label *cur = &tex->labels[menu->selected]; |
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165 |
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166 /* Readjust relative position. */ |
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167 if ((unsigned int)cur->y > tex->rely + menu->h || cur->y < tex->rely) |
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168 tex->rely = cur->y - THEME(menu)->padding; |
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169 } |
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170 |
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171 static void |
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172 handle_keydown(struct gridmenu *menu, const struct event_key *key) |
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173 { |
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174 assert(key->type == EVENT_KEYDOWN); |
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175 |
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176 const struct index idx = get_index(menu); |
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177 const unsigned int save = menu->selected; |
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178 |
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179 switch (key->key) { |
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180 case KEY_UP: |
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181 if (idx.row > 0) |
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182 menu->selected -= menu->ncols; |
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183 break; |
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184 case KEY_RIGHT: |
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185 if (idx.col + 1U < menu->ncols) |
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186 menu->selected += 1; |
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187 break; |
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188 case KEY_DOWN: |
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189 if (idx.row + 1U < GRIDMENU_ENTRY_MAX / menu->ncols) |
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190 menu->selected += menu->ncols; |
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191 break; |
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192 case KEY_LEFT: |
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193 if (idx.col > 0) |
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194 menu->selected -= 1; |
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195 break; |
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196 case KEY_ENTER: |
192
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197 menu->state = GRIDMENU_STATE_ACTIVATED; |
181
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198 break; |
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199 default: |
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200 break; |
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201 } |
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202 |
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203 if (save != menu->selected) |
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204 gridmenu_repaint(menu); |
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205 } |
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206 |
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207 static void |
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208 handle_clickdown(struct gridmenu *menu, const struct event_click *click) |
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209 { |
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210 assert(click->type == EVENT_CLICKDOWN); |
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211 |
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212 const unsigned int save = menu->selected; |
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213 |
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214 for (size_t i = 0; i < GRIDMENU_ENTRY_MAX; ++i) { |
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215 const struct label *l = &menu->tex.labels[i]; |
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216 const int x = menu->x + l->x; |
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217 const int y = menu->y + l->y - menu->tex.rely; |
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218 const unsigned int w = menu->tex.eltw; |
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219 const unsigned int h = menu->tex.elth; |
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220 |
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221 if (maths_is_boxed(x, y, w, h, click->x, click->y)) { |
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222 menu->selected = i; |
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223 break; |
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224 } |
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225 } |
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226 |
192
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227 /* A click immediately active the widget. */ |
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228 if (save != menu->selected) { |
181
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229 gridmenu_repaint(menu); |
192
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230 menu->state = GRIDMENU_STATE_ACTIVATED; |
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231 } |
181
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232 } |
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233 |
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234 void |
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235 gridmenu_reset(struct gridmenu *menu) |
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236 { |
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237 assert(menu); |
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|
238 |
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239 menu->state = GRIDMENU_STATE_NONE; |
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240 } |
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241 |
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242 void |
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243 gridmenu_repaint(struct gridmenu *menu) |
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244 { |
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245 assert(menu); |
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246 assert(GRIDMENU_ENTRY_MAX % menu->ncols == 0); |
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247 |
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248 /* Re-compute positions. */ |
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249 positionate(menu); |
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250 |
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251 /* Zoom to the appropriate y-relative. */ |
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252 zoom(menu); |
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253 |
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254 /* Redraw. */ |
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255 repaint(menu); |
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256 } |
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257 |
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258 void |
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259 gridmenu_handle(struct gridmenu *menu, const union event *ev) |
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260 { |
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261 assert(menu); |
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262 assert(ev); |
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263 |
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264 switch (ev->type) { |
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265 case EVENT_KEYDOWN: |
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266 handle_keydown(menu, &ev->key); |
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267 break; |
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268 case EVENT_CLICKDOWN: |
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269 handle_clickdown(menu, &ev->click); |
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270 break; |
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271 default: |
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272 break; |
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273 } |
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274 } |
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275 |
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276 void |
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277 gridmenu_draw(const struct gridmenu *menu) |
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278 { |
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279 assert(menu); |
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280 assert(menu->nrows > 0 && menu->ncols > 0); |
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281 assert(texture_ok(&menu->tex.texture)); |
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282 |
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283 texture_scale(&menu->tex.texture, |
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284 0, menu->tex.rely, menu->w, menu->h, |
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285 menu->x, menu->y, menu->w, menu->h, 0.0); |
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286 } |
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287 |
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288 void |
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289 gridmenu_finish(struct gridmenu *menu) |
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290 { |
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291 assert(menu); |
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292 |
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293 if (texture_ok(&menu->tex.texture)) |
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294 texture_finish(&menu->tex.texture); |
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295 |
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296 memset(menu, 0, sizeof (*menu)); |
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297 } |