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annotate nuklear_ui/blastem_nuklear.c @ 1478:da1dce39e846 nuklear_ui

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Refactored save slot related logic to reduce duplication and allow reuse in new UI. Get state loading/saving mostly working in new UI
author Michael Pavone <pavone@retrodev.com>
date Fri, 24 Nov 2017 12:04:02 -0800
parents 1cdd7f492af8
children 77a401044935
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1 #define NK_IMPLEMENTATION
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2 #define NK_SDL_GLES2_IMPLEMENTATION
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3
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4 #include <stdlib.h>
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5 #include "blastem_nuklear.h"
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6 #include "font.h"
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7 #include "../render.h"
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8 #include "../render_sdl.h"
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9 #include "../util.h"
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10 #include "../paths.h"
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11 #include "../saves.h"
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12 #include "../blastem.h"
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13
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14 static struct nk_context *context;
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15
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16 typedef void (*view_fun)(struct nk_context *);
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17 static view_fun current_view;
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18 static view_fun previous_view;
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19
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20 void view_play(struct nk_context *context)
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21 {
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22
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23 }
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24
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25 void view_load(struct nk_context *context)
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26 {
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27 static char *current_path;
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28 static dir_entry *entries;
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29 static size_t num_entries;
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30 static uint32_t selected_entry;
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31 get_initial_browse_path(&current_path);
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32 if (!entries) {
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33 entries = get_dir_list(current_path, &num_entries);
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34 }
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35 uint32_t width = render_width();
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36 uint32_t height = render_height();
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37 if (nk_begin(context, "Load ROM", nk_rect(0, 0, width, height), 0)) {
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38 nk_layout_row_static(context, height - 100, width - 60, 1);
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39 if (nk_group_begin(context, "Select ROM", NK_WINDOW_BORDER | NK_WINDOW_TITLE)) {
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40 nk_layout_row_static(context, 28, width-100, 1);
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41 for (uint32_t i = 0; i < num_entries; i++)
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42 {
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43 int selected = i == selected_entry;
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44 nk_selectable_label(context, entries[i].name, NK_TEXT_ALIGN_LEFT, &selected);
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45 if (selected) {
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46 selected_entry = i;
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47 }
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48 }
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49 nk_group_end(context);
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50 }
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51 nk_layout_row_static(context, 52, width > 600 ? 300 : width / 2, 2);
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52 if (nk_button_label(context, "Back")) {
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53 current_view = previous_view;
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54 }
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55 if (nk_button_label(context, "Open")) {
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56 char const *pieces[] = {current_path, PATH_SEP, entries[selected_entry].name};
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57 if (entries[selected_entry].is_dir) {
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58 char *old = current_path;
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59 current_path = alloc_concat_m(3, pieces);
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60 free(old);
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61 free_dir_list(entries, num_entries);
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62 entries = NULL;
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63 } else {
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64 current_system->next_rom = alloc_concat_m(3, pieces);
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65 current_system->request_exit(current_system);
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66 current_view = view_play;
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67 }
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68 }
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69 nk_end(context);
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70 }
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71 }
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72
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73 void view_about(struct nk_context *context)
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74 {
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75 }
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76
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77 typedef struct {
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78 const char *title;
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79 view_fun next_view;
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80 } menu_item;
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81
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82 static save_slot_info *slots;
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83 static uint32_t num_slots, selected_slot;
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84
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85 void view_choose_state(struct nk_context *context, uint8_t is_load)
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86 {
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87 uint32_t width = render_width();
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88 uint32_t height = render_height();
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89 if (nk_begin(context, "Slot Picker", nk_rect(0, 0, width, height), 0)) {
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90 nk_layout_row_static(context, height - 100, width - 60, 1);
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91 if (nk_group_begin(context, "Select Save Slot", NK_WINDOW_BORDER | NK_WINDOW_TITLE)) {
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92 nk_layout_row_static(context, 28, width-100, 1);
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93 if (!slots) {
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94 slots = get_slot_info(current_system, &num_slots);
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95 }
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96 for (uint32_t i = 0; i < num_slots; i++)
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97 {
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98 int selected = i == selected_slot;
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99 nk_selectable_label(context, slots[i].desc, NK_TEXT_ALIGN_LEFT, &selected);
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100 if (selected && (slots[i].modification_time || !is_load)) {
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101 selected_slot = i;
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102 }
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103 }
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104 nk_group_end(context);
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105 }
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106 nk_layout_row_static(context, 52, width > 600 ? 300 : width / 2, 2);
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107 if (nk_button_label(context, "Back")) {
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108 current_view = previous_view;
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109 }
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110 if (is_load) {
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111 if (nk_button_label(context, "Load")) {
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112 current_system->load_state(current_system, selected_slot);
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113 current_view = view_play;
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114 }
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115 } else {
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116 if (nk_button_label(context, "Save")) {
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117 current_system->save_state = selected_slot + 1;
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118 current_view = view_play;
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119 }
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120 }
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121 nk_end(context);
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122 }
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123 }
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124
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125 void view_save_state(struct nk_context *context)
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126 {
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127 view_choose_state(context, 0);
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128 }
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129
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130 void view_load_state(struct nk_context *context)
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131 {
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132 view_choose_state(context, 1);
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133 }
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134
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135 static void menu(struct nk_context *context, uint32_t num_entries, const menu_item *items)
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136 {
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137 const uint32_t button_height = 52;
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138 const uint32_t ideal_button_width = 300;
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139 const uint32_t button_space = 6;
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140
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141 uint32_t width = render_width();
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142 uint32_t height = render_height();
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143 uint32_t top = height/2 - (button_height * num_entries)/2;
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144 uint32_t button_width = width > ideal_button_width ? ideal_button_width : width;
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145 uint32_t left = width/2 - button_width/2;
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146
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147 nk_layout_space_begin(context, NK_STATIC, top + button_height * num_entries, num_entries);
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148 for (uint32_t i = 0; i < num_entries; i++)
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149 {
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150 nk_layout_space_push(context, nk_rect(left, top + i * button_height, button_width, button_height-button_space));
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151 if (nk_button_label(context, items[i].title)) {
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152 previous_view = current_view;
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153 current_view = items[i].next_view;
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154 if (!current_view) {
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155 exit(0);
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156 }
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157 if (current_view == view_save_state || current_view == view_load_state) {
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158 free_slot_info(slots);
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159 slots = NULL;
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160 }
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161 }
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162 }
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163 nk_layout_space_end(context);
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164 }
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165
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166 void view_pause(struct nk_context *context)
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167 {
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168 static menu_item items[] = {
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169 {"Resume", view_play},
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170 {"Load ROM", view_load},
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171 {"Save State", view_save_state},
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172 {"Load State", view_load_state},
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173 {"Exit", NULL}
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174 };
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175
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176 const uint32_t num_buttons = 3;
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177 if (nk_begin(context, "Main Menu", nk_rect(0, 0, render_width(), render_height()), 0)) {
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178 menu(context, sizeof(items)/sizeof(*items), items);
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179 nk_end(context);
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180 }
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181 }
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182
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183 void view_menu(struct nk_context *context)
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184 {
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185 static menu_item items[] = {
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186 {"Load ROM", view_load},
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187 {"About", view_about},
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188 {"Exit", NULL}
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189 };
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190
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191 const uint32_t num_buttons = 3;
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192 if (nk_begin(context, "Main Menu", nk_rect(0, 0, render_width(), render_height()), 0)) {
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193 menu(context, sizeof(items)/sizeof(*items), items);
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194 nk_end(context);
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195 }
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196 }
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197
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198 void blastem_nuklear_render(void)
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199 {
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200 nk_input_end(context);
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201 current_view(context);
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202 nk_sdl_render(NK_ANTI_ALIASING_ON, 512 * 1024, 128 * 1024);
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203 nk_input_begin(context);
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204 }
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205
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206 void idle_loop(void)
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207 {
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208 while (current_view != view_play)
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209 {
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210 render_update_display();
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211 }
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212 }
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213 static void handle_event(SDL_Event *event)
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214 {
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215 nk_sdl_handle_event(event);
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216 }
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217
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218 static void context_destroyed(void)
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219 {
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220 nk_sdl_device_destroy();
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221 }
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222 static void context_created(void)
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223 {
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224 nk_sdl_device_create();
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225 struct nk_font_atlas *atlas;
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226 nk_sdl_font_stash_begin(&atlas);
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227 char *font = default_font_path();
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228 if (!font) {
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229 fatal_error("Failed to find default font path\n");
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230 }
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231 struct nk_font *def_font = nk_font_atlas_add_from_file(atlas, font, 30, NULL);
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232 nk_sdl_font_stash_end();
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233 nk_style_set_font(context, &def_font->handle);
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234 }
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235
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236 void show_pause_menu(void)
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237 {
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238 context->style.window.background = nk_rgba(0, 0, 0, 128);
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239 context->style.window.fixed_background = nk_style_item_color(nk_rgba(0, 0, 0, 128));
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240 current_view = view_pause;
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241 }
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242
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243 static uint8_t active;
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244 uint8_t is_nuklear_active(void)
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245 {
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246 return active;
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247 }
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248
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249 void blastem_nuklear_init(uint8_t file_loaded)
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250 {
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251 context = nk_sdl_init(render_get_window());
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252
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253 struct nk_font_atlas *atlas;
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254 nk_sdl_font_stash_begin(&atlas);
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diff changeset
255 char *font = default_font_path();
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256 if (!font) {
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257 fatal_error("Failed to find default font path\n");
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258 }
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diff changeset
259 struct nk_font *def_font = nk_font_atlas_add_from_file(atlas, font, 30, NULL);
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260 nk_sdl_font_stash_end();
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261 nk_style_set_font(context, &def_font->handle);
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262 current_view = file_loaded ? view_play : view_menu;
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263 render_set_ui_render_fun(blastem_nuklear_render);
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264 render_set_event_handler(handle_event);
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265 render_set_gl_context_handlers(context_destroyed, context_created);
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266 active = 1;
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267 idle_loop();
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268 }