From 6ff50cb5212739e378011060d1d3a7c93b3bf9c0 Mon Sep 17 00:00:00 2001
From: John Alanbrook <john@pockle.world>
Date: Fri, 11 Jul 2025 14:11:34 -0500
Subject: [PATCH] add combo box to imgui

---
 prosperon/prosperon.ce |  2 --
 source/qjs_imgui.cpp   | 77 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+), 2 deletions(-)

diff --git a/prosperon/prosperon.ce b/prosperon/prosperon.ce
index edce3bf1..26efc632 100644
--- a/prosperon/prosperon.ce
+++ b/prosperon/prosperon.ce
@@ -323,8 +323,6 @@ function translate_draw_commands(commands) {
             tempMap.tiles[arrayX][arrayY] = img
           })
           
-
-          
           // Generate geometry for this texture group
           var geom = geometry.tilemap_to_data(tempMap)
           geom.texture_id = parseInt(texId)
diff --git a/source/qjs_imgui.cpp b/source/qjs_imgui.cpp
index 31c21b08..a55072b8 100644
--- a/source/qjs_imgui.cpp
+++ b/source/qjs_imgui.cpp
@@ -160,6 +160,82 @@ JSC_SSCALL(imgui_textbox,
     ret = JS_DupValue(js,argv[1]);
 )
 
+JSC_SCALL(imgui_combo,
+  // argv[0] = label (str)
+  // argv[1] = current selection index or string
+  // argv[2] = array of options or single string with \0 separators
+  
+  int current_item = 0;
+  const char *preview_str = NULL;
+  
+  if (JS_IsNumber(argv[1])) {
+    current_item = js2number(js, argv[1]);
+  } else if (JS_IsString(argv[1])) {
+    preview_str = JS_ToCString(js, argv[1]);
+  }
+  
+  if (JS_IsArray(js, argv[2])) {
+    // Handle array of strings
+    int item_count = JS_ArrayLength(js, argv[2]);
+    const char **items = (const char**)malloc(sizeof(char*) * item_count);
+    
+    for (int i = 0; i < item_count; i++) {
+      JSValue item = JS_GetPropertyUint32(js, argv[2], i);
+      items[i] = JS_ToCString(js, item);
+      JS_FreeValue(js, item);
+    }
+    
+    // If preview_str is set, find its index
+    if (preview_str) {
+      for (int i = 0; i < item_count; i++) {
+        if (strcmp(items[i], preview_str) == 0) {
+          current_item = i;
+          break;
+        }
+      }
+    }
+    
+    if (ImGui::Combo(str, &current_item, items, item_count)) {
+      ret = JS_NewString(js, items[current_item]);
+    } else {
+      if (preview_str) {
+        ret = JS_DupValue(js, argv[1]);
+      } else {
+        ret = JS_NewString(js, items[current_item]);
+      }
+    }
+    
+    // Free the strings
+    for (int i = 0; i < item_count; i++) {
+      JS_FreeCString(js, items[i]);
+    }
+    free(items);
+    
+  } else if (JS_IsString(argv[2])) {
+    // Handle single string with \0 separators
+    const char *items_str = JS_ToCString(js, argv[2]);
+    
+    if (ImGui::Combo(str, &current_item, items_str)) {
+      // Find the selected item string
+      const char *p = items_str;
+      for (int i = 0; i < current_item; i++) {
+        p += strlen(p) + 1;
+      }
+      ret = JS_NewString(js, p);
+    } else {
+      ret = JS_DupValue(js, argv[1]);
+    }
+    
+    JS_FreeCString(js, items_str);
+  } else {
+    ret = JS_DupValue(js, argv[1]);
+  }
+  
+  if (preview_str) {
+    JS_FreeCString(js, preview_str);
+  }
+)
+
 JSC_SCALL(imgui_text, ImGui::Text("%s", str) )
 
 JSC_SCALL(imgui_button,
@@ -837,6 +913,7 @@ const JSCFunctionListEntry js_imgui_funcs[] = {
   MIST_FUNC_DEF(imgui, slider, 4),
   MIST_FUNC_DEF(imgui, intslider, 4),
   MIST_FUNC_DEF(imgui, checkbox, 2),
+  MIST_FUNC_DEF(imgui, combo, 3),
   
   // Basic widgets
   MIST_FUNC_DEF(imgui, text, 1),