InputText, Demo: amend comments to direct more users to the std::string version.

https://www.youtube.com/watch?v=pLwvNdpTpjs wasted a solid hour before finding this.
Crazy that people are using AI instead of actually _reading_ comments, demo and headers. (The information appeared multiple times on their screen)

imgui.h

@@ -705,7 +705,7 @@ namespace ImGui
     IMGUI_API bool          VSliderScalar(const char* label, const ImVec2& size, ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max, const char* format = NULL, ImGuiSliderFlags flags = 0);
 
     // Widgets: Input with Keyboard
-    // - If you want to use InputText() with std::string or any custom dynamic string type, see misc/cpp/imgui_stdlib.h and comments in imgui_demo.cpp.
+    // - If you want to use InputText() with std::string or any custom dynamic string type, use the wrapper in misc/cpp/imgui_stdlib.h/.cpp!
     // - Most of the ImGuiInputTextFlags flags are only useful for InputText() and not for InputFloatX, InputIntX, InputDouble etc.
     IMGUI_API bool          InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
     IMGUI_API bool          InputTextMultiline(const char* label, char* buf, size_t buf_size, const ImVec2& size = ImVec2(0, 0), ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);

imgui_demo.cpp

@@ -887,8 +887,9 @@ static void DemoWindowWidgetsBasic()
         ImGui::SeparatorText("Inputs");
 
         {
-            // To wire InputText() with std::string or any other custom string type,
+            // If you want to use InputText() with std::string or any custom dynamic string type:
-            // see the "Text Input > Resize Callback" section of this demo, and the misc/cpp/imgui_stdlib.h file.
+            // - For std::string: use the wrapper in misc/cpp/imgui_stdlib.h/.cpp
+            // - Otherwise, see the 'Dear ImGui Demo->Widgets->Text Input->Resize Callback' for using ImGuiInputTextFlags_CallbackResize.
             IMGUI_DEMO_MARKER("Widgets/Basic/InputText");
             static char str0[128] = "Hello, world!";
             ImGui::InputText("input text", str0, IM_ARRAYSIZE(str0));
@@ -3696,8 +3697,10 @@ static void DemoWindowWidgetsTextInput()
         IMGUI_DEMO_MARKER("Widgets/Text Input/Multi-line Text Input");
         if (ImGui::TreeNode("Multi-line Text Input"))
         {
-            // Note: we are using a fixed-sized buffer for simplicity here. See ImGuiInputTextFlags_CallbackResize
+            // WE ARE USING A FIXED-SIZE BUFFER FOR SIMPLICITY HERE.
-            // and the code in misc/cpp/imgui_stdlib.h for how to setup InputText() for dynamically resizing strings.
+            // If you want to use InputText() with std::string or any custom dynamic string type:
+            // - For std::string: use the wrapper in misc/cpp/imgui_stdlib.h/.cpp
+            // - Otherwise, see the 'Dear ImGui Demo->Widgets->Text Input->Resize Callback' for using ImGuiInputTextFlags_CallbackResize.
             static char text[1024 * 16] =
                 "/*\n"
                 " The Pentium F00F bug, shorthand for F0 0F C7 C8,\n"

imgui_widgets.cpp

@@ -3920,6 +3920,7 @@ namespace ImStb
 #include "imstb_textedit.h"
 }
 
+// If you want to use InputText() with std::string or any custom dynamic string type, use the wrapper in misc/cpp/imgui_stdlib.h/.cpp!
 bool ImGui::InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data)
 {
     IM_ASSERT(!(flags & ImGuiInputTextFlags_Multiline)); // call InputTextMultiline()
@@ -4620,9 +4621,7 @@ static ImVec2 InputTextLineIndexGetPosOffset(ImGuiContext& g, ImGuiInputTextStat
 //   This is so we can easily call InputText() on static arrays using ARRAYSIZE() and to match
 //   Note that in std::string world, capacity() would omit 1 byte used by the zero-terminator.
 // - When active, hold on a privately held copy of the text (and apply back to 'buf'). So changing 'buf' while the InputText is active has no effect.
-// - If you want to use ImGui::InputText() with std::string, see misc/cpp/imgui_stdlib.h
+// - If you want to use InputText() with std::string or any custom dynamic string type, use the wrapper in misc/cpp/imgui_stdlib.h/.cpp!
-// (FIXME: Rather confusing and messy function, among the worse part of our codebase, expecting to rewrite a V2 at some point.. Partly because we are
-//  doing UTF8 > U16 > UTF8 conversions on the go to easily interface with stb_textedit. Ideally should stay in UTF-8 all the time. See https://github.com/nothings/stb/issues/188)
 bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* callback_user_data)
 {
     ImGuiWindow* window = GetCurrentWindow();

misc/cpp/imgui_stdlib.cpp

@@ -1,9 +1,21 @@
 // dear imgui: wrappers for C++ standard library (STL) types (std::string, etc.)
+
 // This is also an example of how you may wrap your own similar types.
+// TL;DR; this is using the ImGuiInputTextFlags_CallbackResize facility,
+// which also demonstrated in 'Dear ImGui Demo->Widgets->Text Input->Resize Callback'.
 
 // Changelog:
 // - v0.10: Initial version. Added InputText() / InputTextMultiline() calls with std::string
 
+// Usage:
+// {
+//   #include "misc/cpp/imgui_stdlib.h"
+//   #include "misc/cpp/imgui_stdlib.cpp" // <-- If you want to include implementation without messing with your project/build.
+//   [...]
+//   std::string my_string;
+//   ImGui::InputText("my string", &my_string);
+// }
+
 // See more C++ related extension (fmt, RAII, syntaxis sugar) on Wiki:
 //   https://github.com/ocornut/imgui/wiki/Useful-Extensions#cness
 

misc/cpp/imgui_stdlib.h

@@ -1,9 +1,21 @@
 // dear imgui: wrappers for C++ standard library (STL) types (std::string, etc.)
+
 // This is also an example of how you may wrap your own similar types.
+// TL;DR; this is using the ImGuiInputTextFlags_CallbackResize facility,
+// which also demonstrated in 'Dear ImGui Demo->Widgets->Text Input->Resize Callback'.
 
 // Changelog:
 // - v0.10: Initial version. Added InputText() / InputTextMultiline() calls with std::string
 
+// Usage:
+// {
+//   #include "misc/cpp/imgui_stdlib.h"
+//   #include "misc/cpp/imgui_stdlib.cpp" // <-- If you want to include implementation without messing with your project/build.
+//   [...]
+//   std::string my_string;
+//   ImGui::InputText("my string", &my_string);
+// }
+
 // See more C++ related extension (fmt, RAII, syntaxis sugar) on Wiki:
 //   https://github.com/ocornut/imgui/wiki/Useful-Extensions#cness