some code in the exhibit ui, and first stab at laying out the

[laserbrain_demo] / src / ui_exhibit.cc

diff --git a/src/ui_exhibit.cc b/src/ui_exhibit.cc
index 409bd94..355d078 100644 (file)
--- a/src/ui_exhibit.cc
+++ b/src/ui_exhibit.cc
@@ -1,8 +1,28 @@
 #include "ui_exhibit.h"
+#include "ui.h"
 #include "app.h"
+#include <drawtext.h>
+
+static void draw_titlebar();
+static void draw_tabs();
+static void layout_text(const char *text);
+
+static Vec3 pos;
+static Vec2 size;
+static float text_padding;
+static Exhibit *ex;
+static int vis_tab;
+static float scroll;
+static std::vector<const char*> text_lines;
+static AudioStream *voice;
+
 
 bool exui_init()
 {
+       size.x = 150;
+       size.y = 180;
+       text_padding = size.x * 0.01;
+
        return true;
 }
 
@@ -10,12 +30,103 @@ void exui_shutdown()
 {
 }
 
+void exui_change_tab(int dir)
+{
+}
+
+void exui_scroll(float delta)
+{
+}
+
+bool exui_raycast(const Ray &ray)
+{
+       return false;
+}
+
 void exui_update(float dt)
 {
+       if(exsel_active.ex != ex) {
+               ex = exsel_active.ex;
+               scroll = 0.0f;
+               vis_tab = 0;
+               text_lines.clear();
+               if(voice) voice->stop();
+
+               if(ex) {
+                       int num_data = ex->data.size();
+                       for(int i=0; i<num_data; i++) {
+                               if(ex->data[i].type == EXDATA_INFO) {
+                                       layout_text(ex->data[i].text.c_str());
+                                       voice = ex->data[i].voice;
+                               }
+                       }
+
+                       if(voice) {
+                               voice->play(AUDIO_PLAYMODE_ONCE);
+                       }
+               } else {
+                       voice = 0;
+               }
+       }
 }
 
 void exui_draw()
 {
        if(!exsel_active) return;
 
+       draw_titlebar();
+       draw_tabs();
+}
+
+static void draw_titlebar()
+{
+}
+
+static void draw_tabs()
+{
+}
+
+static void layout_text(const char *text)
+{
+       text_lines.clear();
+       if(!text) return;
+       if(!ui_font) return;
+
+       dtx_use_font(ui_font, ui_font_size);
+
+       float pos = text_padding;
+       text_lines.push_back(text);
+       const char *last_break = 0;
+
+       while(*text) {
+               if(*text == '\n') {     // paragraph break
+                       text_lines.push_back(text);
+                       text_lines.push_back(++text);
+                       pos = text_padding;
+                       last_break = 0;
+                       continue;
+               }
+
+               int code = dtx_utf8_char_code(text);
+               const char *next = dtx_utf8_next_char((char*)text);
+               pos += dtx_glyph_width(code);
+
+               if(pos >= size.x - text_padding) {
+                       if(text == text_lines.back()) {
+                               // not even a single character fits on a line... abort
+                               warning_log("text layout failed. glyph %d doesn't fit in line (%g)\n", code, size.x - 2.0 * text_padding);
+                               text_lines.clear();
+                               return;
+                       }
+                       if(last_break) {
+                               text_lines.push_back(last_break + 1);
+                               last_break = 0;
+                       } else {
+                               // no good point to break, just break here
+                               text_lines.push_back(text);
+                       }
+                       pos = text_padding;
+               }
+               text = next;
+       }
 }