Mercurial > molko
annotate libmlk-rpg/rpg/message.c @ 278:cc676046aac9
core: add sprite_scale function
author | David Demelier <markand@malikania.fr> |
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date | Tue, 15 Dec 2020 22:06:32 +0100 |
parents | 71b3b7036de7 |
children | 196264679079 |
rev | line source |
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1 /* |
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2 * message.c -- message dialog |
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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 <stdlib.h> |
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21 #include <string.h> |
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22 |
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23 #include <core/action.h> |
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24 #include <core/event.h> |
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25 #include <core/font.h> |
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26 #include <core/maths.h> |
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27 #include <core/painter.h> |
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28 #include <core/panic.h> |
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29 #include <core/sprite.h> |
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30 #include <core/trace.h> |
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31 #include <core/util.h> |
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32 |
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33 #include <ui/align.h> |
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34 #include <ui/frame.h> |
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35 #include <ui/label.h> |
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36 #include <ui/theme.h> |
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37 |
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38 #include "message.h" |
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39 #include "rpg_p.h" |
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40 |
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41 #define THEME(msg) (msg->theme ? msg->theme : theme_default()) |
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42 |
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43 static void |
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44 handle(struct action *action, const union event *ev) |
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45 { |
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46 assert(action); |
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47 assert(ev); |
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48 |
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49 message_handle(action->data, ev); |
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50 } |
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51 |
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52 static bool |
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53 update(struct action *action, unsigned int ticks) |
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54 { |
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55 assert(action); |
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56 |
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57 return message_update(action->data, ticks); |
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58 } |
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59 |
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60 static void |
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61 draw(struct action *action) |
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62 { |
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63 assert(action); |
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64 |
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65 message_draw(action->data); |
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66 } |
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67 |
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68 static void |
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69 draw_frame(const struct message *msg) |
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70 { |
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71 assert(msg); |
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72 |
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73 struct frame frame = { |
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74 .w = msg->w, |
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75 .h = msg->h, |
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76 .theme = msg->theme |
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77 }; |
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78 |
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79 frame_draw(&frame); |
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80 } |
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81 |
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82 static inline unsigned int |
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83 min_width(const struct message *msg) |
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84 { |
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85 assert(msg); |
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86 |
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87 unsigned int maxw = 0, w = 0; |
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88 |
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89 for (size_t i = 0; i < MESSAGE_LINES_MAX; ++i) { |
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90 if (!msg->text[i]) |
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91 continue; |
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92 if (!font_query(THEME(msg)->fonts[THEME_FONT_INTERFACE], msg->text[i], &w, NULL)) |
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93 panic(); |
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94 if (w > maxw) |
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95 maxw = w; |
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96 } |
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97 |
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98 return (THEME(msg)->padding * 2) + maxw; |
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99 } |
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100 |
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101 static inline unsigned int |
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102 min_height(const struct message *msg) |
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103 { |
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104 assert(msg); |
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105 |
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106 const struct theme *th = THEME(msg); |
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107 const unsigned int lh = font_height(th->fonts[THEME_FONT_INTERFACE]); |
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108 |
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109 return (th->padding * 2) + (MESSAGE_LINES_MAX * lh) + ((MESSAGE_LINES_MAX - 1) * msg->spacing); |
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110 } |
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111 |
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112 static void |
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113 draw_lines(const struct message *msg) |
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114 { |
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115 struct theme theme; |
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116 struct label label; |
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117 unsigned int lw, lh; |
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118 |
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119 /* |
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120 * We need a copy of the current theme because we will alter the label |
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121 * color depending on the selection. |
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122 */ |
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123 theme_shallow(&theme, THEME(msg)); |
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124 |
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125 for (int i = 0; i < MESSAGE_LINES_MAX; ++i) { |
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126 if (!msg->text[i]) |
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127 continue; |
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128 if (!font_query(theme.fonts[THEME_FONT_INTERFACE], msg->text[i], &lw, &lh)) |
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129 panic(); |
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130 |
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131 label.theme = &theme; |
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132 label.x = theme.padding; |
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133 label.y = theme.padding + (i * (lh + msg->spacing)); |
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134 label.text = msg->text[i]; |
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135 label.flags = LABEL_FLAGS_SHADOW; |
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136 |
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137 if (label.x + lw > msg->w) |
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138 tracef(_("message width too small: %u < %u"), msg->w, min_width(msg)); |
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139 if (label.y + lh > msg->h) |
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140 tracef(_("message height too small: %u < %u"), msg->h, min_height(msg)); |
140
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141 |
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142 /* |
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143 * The function label_draw will use THEME_COLOR_NORMAL to draw |
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144 * text and THEME_COLOR_SHADOW so if we have selected a line |
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145 * we need to cheat the normal color. |
140
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146 */ |
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147 if (msg->flags & MESSAGE_FLAGS_QUESTION && msg->index == (unsigned int)i) |
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148 theme.colors[THEME_COLOR_NORMAL] = THEME(msg)->colors[THEME_COLOR_SELECTED]; |
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149 else |
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150 theme.colors[THEME_COLOR_NORMAL] = THEME(msg)->colors[THEME_COLOR_NORMAL]; |
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151 |
140
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152 label_draw(&label); |
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153 } |
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154 } |
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155 |
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156 void |
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157 message_start(struct message *msg) |
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158 { |
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159 assert(msg); |
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160 |
141
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161 if (msg->flags & (MESSAGE_FLAGS_FADEIN|MESSAGE_FLAGS_FADEOUT)) |
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162 assert(msg->delay > 0); |
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163 |
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164 msg->elapsed = 0; |
140
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165 msg->scale = msg->flags & MESSAGE_FLAGS_FADEIN ? 0.0 : 1.0; |
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166 msg->state = msg->flags & MESSAGE_FLAGS_FADEIN |
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167 ? MESSAGE_STATE_OPENING |
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168 : MESSAGE_STATE_SHOWING; |
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169 |
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170 if (msg->flags & MESSAGE_FLAGS_AUTOMATIC && msg->timeout == 0) |
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171 tracef(_("message is automatic but has zero timeout")); |
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172 } |
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173 |
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174 void |
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175 message_query(const struct message *msg, unsigned int *w, unsigned int *h) |
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176 { |
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177 assert(msg); |
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178 |
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179 if (w) |
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180 *w = min_width(msg); |
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181 if (h) |
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182 *h = min_height(msg); |
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183 } |
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184 |
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185 void |
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186 message_handle(struct message *msg, const union event *ev) |
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187 { |
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188 assert(msg); |
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189 assert(ev); |
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190 |
100
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191 /* Skip if the message animation hasn't complete. */ |
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192 if (msg->state != MESSAGE_STATE_SHOWING) |
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193 return; |
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194 |
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195 /* Only keyboard event are valid. */ |
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196 if (ev->type != EVENT_KEYDOWN || msg->state == MESSAGE_STATE_NONE) |
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197 return; |
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198 |
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199 switch (ev->key.key) { |
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200 case KEY_UP: |
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201 if (msg->index > 0) |
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202 msg->index--; |
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203 break; |
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204 case KEY_DOWN: |
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205 if (msg->index < 5 && msg->text[msg->index + 1]) |
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206 msg->index++; |
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207 break; |
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208 case KEY_ENTER: |
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209 msg->state = msg->flags & MESSAGE_FLAGS_FADEOUT |
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210 ? MESSAGE_STATE_HIDING |
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211 : MESSAGE_STATE_NONE; |
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212 msg->elapsed = 0; |
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213 break; |
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214 default: |
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215 break; |
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216 } |
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217 } |
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218 |
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219 bool |
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220 message_update(struct message *msg, unsigned int ticks) |
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221 { |
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222 assert(msg); |
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223 |
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224 msg->elapsed += ticks; |
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225 |
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226 switch (msg->state) { |
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227 case MESSAGE_STATE_OPENING: |
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228 msg->scale = (double)msg->elapsed / (double)msg->delay; |
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229 |
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230 if (msg->scale > 1) |
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231 msg->scale = 1; |
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232 |
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233 if (msg->elapsed >= msg->delay) { |
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234 msg->state = MESSAGE_STATE_SHOWING; |
62 | 235 msg->elapsed = 0; |
236 } | |
237 | |
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238 break; |
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239 case MESSAGE_STATE_SHOWING: |
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240 /* Do automatically switch state if requested by the user. */ |
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241 if (msg->flags & MESSAGE_FLAGS_AUTOMATIC && msg->elapsed >= msg->timeout) { |
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242 msg->state = msg->flags & MESSAGE_FLAGS_FADEOUT |
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243 ? MESSAGE_STATE_HIDING |
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244 : MESSAGE_STATE_NONE; |
62 | 245 msg->elapsed = 0; |
246 } | |
247 | |
248 break; | |
140
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249 case MESSAGE_STATE_HIDING: |
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250 msg->scale = 1 - (double)msg->elapsed / (double)msg->delay; |
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251 |
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252 if (msg->scale < 0) |
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253 msg->scale = 0; |
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254 if (msg->elapsed >= msg->delay) { |
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255 msg->state = MESSAGE_STATE_NONE; |
62 | 256 msg->elapsed = 0; |
257 } | |
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258 |
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259 break; |
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260 default: |
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261 break; |
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262 } |
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263 |
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264 return msg->state == MESSAGE_STATE_NONE; |
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265 } |
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266 |
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267 void |
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268 message_draw(const struct message *msg) |
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269 { |
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270 assert(msg); |
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271 |
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272 struct texture tex; |
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273 int x, y; |
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274 unsigned int w, h; |
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275 |
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276 if (msg->w == 0 || msg->h == 0) { |
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277 tracef(_("message has null dimensions")); |
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278 return; |
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279 } |
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280 |
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281 if (!texture_new(&tex, msg->w, msg->h)) |
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282 panic(); |
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283 |
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284 PAINTER_BEGIN(&tex); |
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285 draw_frame(msg); |
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286 draw_lines(msg); |
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287 PAINTER_END(); |
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288 |
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289 /* Compute scaling. */ |
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290 w = msg->w * msg->scale; |
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291 h = msg->h * msg->scale; |
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292 |
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293 /* Centerize within its drawing area. */ |
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294 align(ALIGN_CENTER, &x, &y, w, h, msg->x, msg->y, msg->w, msg->h); |
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295 |
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296 /* Draw and clear. */ |
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297 texture_scale(&tex, 0, 0, msg->w, msg->h, x, y, w, h, 0); |
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298 texture_finish(&tex); |
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299 } |
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300 |
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301 void |
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302 message_hide(struct message *msg) |
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303 { |
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304 assert(msg); |
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305 |
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306 msg->state = MESSAGE_STATE_HIDING; |
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307 msg->elapsed = 0; |
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308 } |
62 | 309 |
310 void | |
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311 message_action(struct message *msg, struct action *action) |
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312 { |
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313 assert(msg); |
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314 assert(action); |
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315 |
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316 memset(action, 0, sizeof (struct action)); |
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317 action->data = msg; |
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318 action->handle = handle; |
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319 action->update = update; |
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320 action->draw = draw; |
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321 |
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322 message_start(msg); |
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323 } |