Fix BeginDisabled(false), again, (#211, #4452, #4453)

docs/CHANGELOG.txt

@@ -31,6 +31,17 @@ HOW TO UPDATE?
 - Please report any issue!
 
 
+-----------------------------------------------------------------------
+ VERSION 1.84b (Released 2021-08-20)
+-----------------------------------------------------------------------
+
+Decorated log: https://github.com/ocornut/imgui/releases/tag/v1.84b
+
+Other Changes:
+
+- Fixed BeginDisabled(false) - BeginDisabled(true) was working. (#211, #4452, #4453)
+
+
 -----------------------------------------------------------------------
  VERSION 1.84 (Released 2021-08-20)
 -----------------------------------------------------------------------

imgui.cpp

@@ -6621,7 +6621,7 @@ void ImGui::PopItemFlag()
 // - Those can be nested but this cannot be used to enable an already disabled section (a single BeginDisabled(true) in the stack is enough to keep things disabled)
 // - Visually this is currently altering alpha, but it is expected that in a future styling system this would work differently.
 // - Feedback welcome at https://github.com/ocornut/imgui/issues/211
-// - BeginDisabled(false) essentially does nothing but is provided to facilitate use of boolean expressions
+// - BeginDisabled(false) essentially does nothing useful but is provided to facilitate use of boolean expressions. If you can avoid calling BeginDisabled(False)/EndDisabled() best to avoid it.
 // - Optimized shortcuts instead of PushStyleVar() + PushItemFlag()
 void ImGui::BeginDisabled(bool disabled)
 {
@@ -6630,8 +6630,8 @@ void ImGui::BeginDisabled(bool disabled)
     g.DisabledAlphaBackup = g.Style.Alpha;
     if (!was_disabled && disabled)
         g.Style.Alpha *= g.Style.DisabledAlpha; // PushStyleVar(ImGuiStyleVar_Alpha, g.Style.Alpha * g.Style.DisabledAlpha);
-    //PushItemFlag(ImGuiItemFlags_Disabled, was_disabled || disabled);
-    g.CurrentItemFlags |= ImGuiItemFlags_Disabled;
+    if (was_disabled || disabled)
+        g.CurrentItemFlags |= ImGuiItemFlags_Disabled;
     g.ItemFlagsStack.push_back(g.CurrentItemFlags);
 }
 

imgui.h

@@ -61,7 +61,7 @@ Index of this file:
 // Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals. Work in progress versions typically starts at XYY99 then bounce up to XYY00, XYY01 etc. when release tagging happens)
 #define IMGUI_VERSION               "1.84"
-#define IMGUI_VERSION_NUM           18401
+#define IMGUI_VERSION_NUM           18402
 #define IMGUI_CHECKVERSION()        ImGui::DebugCheckVersionAndDataLayout(IMGUI_VERSION, sizeof(ImGuiIO), sizeof(ImGuiStyle), sizeof(ImVec2), sizeof(ImVec4), sizeof(ImDrawVert), sizeof(ImDrawIdx))
 #define IMGUI_HAS_TABLE
 
@@ -801,6 +801,7 @@ namespace ImGui
 
     // Disabling [BETA API]
     // - Disable all user interactions and dim items visuals (applying style.DisabledAlpha over current colors)
+    // - BeginDisabled(false) essentially does nothing useful but is provided to facilitate use of boolean expressions. If you can avoid calling BeginDisabled(False)/EndDisabled() best to avoid it.
     IMGUI_API void          BeginDisabled(bool disabled = true);
     IMGUI_API void          EndDisabled();