Comments (#676, #655)

imgui.cpp

@@ -162,6 +162,7 @@
                                float new_a = 1.0f - ((1.0f - win_bg_col.w) * (1.0f - title_bg_col.w)), k = title_bg_col.w / new_a;
                                return ImVec4((win_bg_col.x * win_bg_col.w + title_bg_col.x) * k, (win_bg_col.y * win_bg_col.w + title_bg_col.y) * k, (win_bg_col.z * win_bg_col.w + title_bg_col.z) * k, new_a);
                            }
+                       If this is confusing, pick the RGB value from title bar from an old screenshot and apply this as TitleBg/TitleBgActive. Or you may just create TitleBgActive from a tweaked TitleBg color.
  - 2016/05/07 (1.49) - removed confusing set of GetInternalState(), GetInternalStateSize(), SetInternalState() functions. Now using CreateContext(), DestroyContext(), GetCurrentContext(), SetCurrentContext().
  - 2016/05/02 (1.49) - renamed SetNextTreeNodeOpened() to SetNextTreeNodeOpen(), no redirection.
  - 2016/05/01 (1.49) - obsoleted old signature of CollapsingHeader(const char* label, const char* str_id = NULL, bool display_frame = true, bool default_open = false) as extra parameters were badly designed and rarely used. You can replace the "default_open = true" flag in new API with CollapsingHeader(label, ImGuiTreeNodeFlags_DefaultOpen).

imgui.h

@@ -145,10 +145,10 @@ namespace ImGui
     IMGUI_API void          SetNextWindowContentWidth(float width);                             // set next window content width (enforce the range of horizontal scrollbar). call before Begin()
     IMGUI_API void          SetNextWindowCollapsed(bool collapsed, ImGuiSetCond cond = 0);      // set next window collapsed state. call before Begin()
     IMGUI_API void          SetNextWindowFocus();                                               // set next window to be focused / front-most. call before Begin()
-    IMGUI_API void          SetWindowPos(const ImVec2& pos, ImGuiSetCond cond = 0);             // set current window position - call within Begin()/End(). may incur tearing
-    IMGUI_API void          SetWindowSize(const ImVec2& size, ImGuiSetCond cond = 0);           // set current window size. set to ImVec2(0,0) to force an auto-fit. may incur tearing
-    IMGUI_API void          SetWindowCollapsed(bool collapsed, ImGuiSetCond cond = 0);          // set current window collapsed state
-    IMGUI_API void          SetWindowFocus();                                                   // set current window to be focused / front-most
+    IMGUI_API void          SetWindowPos(const ImVec2& pos, ImGuiSetCond cond = 0);             // (not recommended) set current window position - call within Begin()/End(). prefer using SetNextWindowPos(), as this may incur tearing and side-effects.
+    IMGUI_API void          SetWindowSize(const ImVec2& size, ImGuiSetCond cond = 0);           // (not recommended) set current window size - call within Begin()/End(). set to ImVec2(0,0) to force an auto-fit. prefer using SetNextWindowSize(), as this may incur tearing and minor side-effects.    
+    IMGUI_API void          SetWindowCollapsed(bool collapsed, ImGuiSetCond cond = 0);          // (not recommended) set current window collapsed state. prefer using SetNextWindowCollapsed().
+    IMGUI_API void          SetWindowFocus();                                                   // (not recommended) set current window to be focused / front-most. prefer using SetNextWindowFocus().
     IMGUI_API void          SetWindowPos(const char* name, const ImVec2& pos, ImGuiSetCond cond = 0);      // set named window position.
     IMGUI_API void          SetWindowSize(const char* name, const ImVec2& size, ImGuiSetCond cond = 0);    // set named window size. set axis to 0.0f to force an auto-fit on this axis.
     IMGUI_API void          SetWindowCollapsed(const char* name, bool collapsed, ImGuiSetCond cond = 0);   // set named window collapsed state