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annotate libmlk-ui/mlk/ui/gridmenu.h @ 620:91ef0df9f501

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ui: simplify gridmenu
author David Demelier <markand@malikania.fr>
date Tue, 22 Aug 2023 19:23:00 +0200
parents d97674d33764
children eecdf5140245
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1 /*
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2 * gridmenu.h -- GUI grid menu
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3 *
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4 * Copyright (c) 2020-2023 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 #ifndef MLK_UI_GRIDMENU_H
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20 #define MLK_UI_GRIDMENU_H
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21
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22 #include <stddef.h>
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24 struct mlk_font;
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25 struct mlk_gridmenu;
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26 struct mlk_gridmenu_style;
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27
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28 union mlk_event;
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29
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30 struct mlk_gridmenu {
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31 /**
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32 * (read-write)
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33 *
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34 * Position in x.
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35 */
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36 int x;
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37
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38 /**
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39 * (read-write)
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40 *
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41 * Position in y.
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42 */
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43 int y;
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44
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45 /**
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46 * (read-write)
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47 *
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48 * Menu frame width.
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49 */
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50 unsigned int w;
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51
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52 /**
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53 * (read-write)
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54 *
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55 * Menu frame height.
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56 */
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57 unsigned int h;
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58
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59 /**
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60 * (read-write, borrowed)
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61 *
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62 * List of strings to show.
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63 */
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64 const char * const *items;
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65
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66 /**
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67 * (read-write)
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68 *
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69 * Number of items in ::mlk_gridmenu::items.
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70 */
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71 size_t itemsz;
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72
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73 /**
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74 * (read-write)
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75 *
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76 * Current selected item in the grid.
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77 */
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78 size_t selected;
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79
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80 /**
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81 * (read-write)
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82 *
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83 * Number of rows to be shown within the frame height.
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84 */
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85 unsigned int nrows;
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86
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87 /**
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88 * (read-write)
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89 *
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90 * Number of colums to be shown within the frame width.
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91 */
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92 unsigned int ncols;
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93
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94 /**
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95 * (read-write, borrowed)
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96 *
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97 * Style to use for drawing this menu.
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98 */
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99 struct mlk_gridmenu_style *style;
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100
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101 /** \cond MLK_PRIVATE_DECLS */
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102 unsigned int eltw; /* maximum entry label width */
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103 unsigned int elth; /* maximum entry label height */
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104 unsigned int spacew; /* space between element horizontally */
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105 unsigned int spaceh; /* and vertically */
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106 /** \endcond MLK_PRIVATE_DECLS */
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107 };
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108
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109 /**
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110 * \struct mlk_gridmenu_style
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111 * \brief Grid menu style.
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112 */
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113 struct mlk_gridmenu_style {
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114 /**
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115 * (read-write)
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116 *
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117 * Background color.
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118 */
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119 unsigned long background;
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120
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121 /**
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122 * (read-write)
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123 *
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124 * Border color.
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125 */
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126 unsigned long border;
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127
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128 /**
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129 * (read-write)
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130 *
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131 * Border size.
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132 */
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133 unsigned int border_size;
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134
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135 /**
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136 * (read-write)
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137 *
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138 * Text color.
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139 */
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140 unsigned long color;
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141
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142 /**
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143 * (read-write)
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144 *
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145 * Selected color.
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146 */
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147 unsigned long color_selected;
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148
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149 /**
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150 * (read-write, borrowed, optional)
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151 *
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152 * Font for drawing text.
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153 */
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154 struct mlk_font *font;
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155
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156 /*
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157 * (read-write, borrowed, optional)
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158 *
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159 * Arbitrary user data.
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160 */
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161 void *data;
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162
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163 /**
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164 * (read-write, optional)
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165 *
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166 * Update the grid menu.
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167 *
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168 * \param self this style
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169 * \param menu the menu to update
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170 * \param ticks number of ticks since last frame
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171 */
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172 void (*update)(struct mlk_gridmenu_style *self,
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173 struct mlk_gridmenu *menu,
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174 unsigned int ticks);
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175
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176 /**
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177 * (read-write, optional)
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178 *
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179 * Draw a frame box for this menu.
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180 *
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181 * \param self this style
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182 * \param menu the underlying menu
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183 */
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184 void (*draw_frame)(struct mlk_gridmenu_style *self,
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185 struct mlk_gridmenu *menu);
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186
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187 /**
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188 * (read-write, optional)
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189 *
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190 * Draw a specific item.
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191 *
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192 * \param self this style
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193 * \param menu the underlying menu
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194 * \param item the item content
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195 * \param row the row number (relative)
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196 * \param col the column number (relative)
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197 * \param selected non-zero if the item is currently selected
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198 */
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199 void (*draw_text)(struct mlk_gridmenu_style *self,
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200 struct mlk_gridmenu *menu,
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201 const char *item,
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202 unsigned int row,
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203 unsigned int col,
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204 int selected);
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205 };
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206
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207 /**
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208 * \brief Dark default style for gridmenu.
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209 */
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210 extern struct mlk_gridmenu_style mlk_gridmenu_style_dark;
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211
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212 /**
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213 * \brief Light default style for gridmenu.
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214 */
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215 extern struct mlk_gridmenu_style mlk_gridmenu_style_light;
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216
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217 /**
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218 * \brief Default style for all gridmenus.
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219 */
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220 extern struct mlk_gridmenu_style *mlk_gridmenu_style;
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221
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222 #if defined(__cplusplus)
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223 extern "C" {
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224 #endif
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225
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226 /**
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227 * Resize the grid menu window.
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228 *
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229 * \pre menu != NULL
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230 * \param menu the menu
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231 */
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232 void
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233 mlk_gridmenu_resize(struct mlk_gridmenu *menu);
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234
608
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235 /**
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236 * Handle an event.
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237 *
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238 * \pre menu != NULL
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239 * \pre ev != NULL
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240 * \param menu the menu
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241 * \param ev the event
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242 * \return non-zero if a new item is selected, 0 otherwise
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243 */
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244 int
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245 mlk_gridmenu_handle(struct mlk_gridmenu *menu, const union mlk_event *ev);
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246
608
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247 /**
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248 * Invoke ::mlk_gridmenu_style::update.
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249 */
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250 void
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251 mlk_gridmenu_update(struct mlk_gridmenu *menu, unsigned int ticks);
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252
608
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253 /**
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254 * Invoke the functions:
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255 *
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256 * - ::mlk_gridmenu_style::draw_frame,
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257 * - ::mlk_gridmenu_style::draw_item.
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258 */
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259 void
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260 mlk_gridmenu_draw(struct mlk_gridmenu *menu);
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261
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262 #if defined(__cplusplus)
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263 }
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264 #endif
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265
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266 #endif /* !MLK_UI_GRIDMENU_H */