git.mutantstargoat.com Git - laserbrain_demo/blob - src/ui_exhibit.cc

   1 #include "ui_exhibit.h"
   2 #include "ui.h"
   3 #include "app.h"
   4 #include <drawtext.h>
   5
   6 static void draw_titlebar();
   7 static void draw_tabs();
   8 static void layout_text(const char *text);
   9
  10 static Vec3 pos;
  11 static Vec2 size;
  12 static float text_padding;
  13 static Exhibit *ex;
  14 static int vis_tab;
  15 static float scroll;
  16 static std::vector<const char*> text_lines;
  17 static AudioStream *voice;
  18
  19
  20 bool exui_init()
  21 {
  22         size.x = 150;
  23         size.y = 180;
  24         text_padding = size.x * 0.01;
  25
  26         return true;
  27 }
  28
  29 void exui_shutdown()
  30 {
  31 }
  32
  33 void exui_change_tab(int dir)
  34 {
  35 }
  36
  37 void exui_scroll(float delta)
  38 {
  39 }
  40
  41 bool exui_raycast(const Ray &ray)
  42 {
  43         return false;
  44 }
  45
  46 void exui_update(float dt)
  47 {
  48         if(exsel_active.ex != ex) {
  49                 ex = exsel_active.ex;
  50                 scroll = 0.0f;
  51                 vis_tab = 0;
  52                 text_lines.clear();
  53                 if(voice) voice->stop();
  54
  55                 if(ex) {
  56                         int num_data = ex->data.size();
  57                         for(int i=0; i<num_data; i++) {
  58                                 if(ex->data[i].type == EXDATA_INFO) {
  59                                         layout_text(ex->data[i].text.c_str());
  60                                         voice = ex->data[i].voice;
  61                                 }
  62                         }
  63
  64                         if(voice) {
  65                                 voice->play(AUDIO_PLAYMODE_ONCE);
  66                         }
  67                 } else {
  68                         voice = 0;
  69                 }
  70         }
  71 }
  72
  73 void exui_draw()
  74 {
  75         if(!exsel_active) return;
  76
  77         draw_titlebar();
  78         draw_tabs();
  79 }
  80
  81 static void draw_titlebar()
  82 {
  83 }
  84
  85 static void draw_tabs()
  86 {
  87 }
  88
  89 static void layout_text(const char *text)
  90 {
  91         text_lines.clear();
  92         if(!text) return;
  93         if(!ui_font) return;
  94
  95         dtx_use_font(ui_font, ui_font_size);
  96
  97         float pos = text_padding;
  98         text_lines.push_back(text);
  99         const char *last_break = 0;
 100
 101         while(*text) {
 102                 if(*text == '\n') {     // paragraph break
 103                         text_lines.push_back(text);
 104                         text_lines.push_back(++text);
 105                         pos = text_padding;
 106                         last_break = 0;
 107                         continue;
 108                 }
 109
 110                 int code = dtx_utf8_char_code(text);
 111                 const char *next = dtx_utf8_next_char((char*)text);
 112                 pos += dtx_glyph_width(code);
 113
 114                 if(pos >= size.x - text_padding) {
 115                         if(text == text_lines.back()) {
 116                                 // not even a single character fits on a line... abort
 117                                 warning_log("text layout failed. glyph %d doesn't fit in line (%g)\n", code, size.x - 2.0 * text_padding);
 118                                 text_lines.clear();
 119                                 return;
 120                         }
 121                         if(last_break) {
 122                                 text_lines.push_back(last_break + 1);
 123                                 last_break = 0;
 124                         } else {
 125                                 // no good point to break, just break here
 126                                 text_lines.push_back(text);
 127                         }
 128                         pos = text_padding;
 129                 }
 130                 text = next;
 131         }
 132 }