Internal: using more consistent comparaison with HiddenFrames to not imply it could be -1. Tweaked comments.

imgui.cpp

@@ -3245,7 +3245,7 @@ static void ImGui::NavUpdate()
     g.NavScoringCount = 0;
 #if IMGUI_DEBUG_NAV_RECTS
     if (g.NavWindow) { for (int layer = 0; layer < 2; layer++) g.OverlayDrawList.AddRect(g.NavWindow->Pos + g.NavWindow->NavRectRel[layer].Min, g.NavWindow->Pos + g.NavWindow->NavRectRel[layer].Max, IM_COL32(255,200,0,255)); } // [DEBUG] 
-    if (g.NavWindow) { ImU32 col = (g.NavWindow->HiddenFrames <= 0) ? IM_COL32(255,0,255,255) : IM_COL32(255,0,0,255); ImVec2 p = NavCalcPreferredMousePos(); char buf[32]; ImFormatString(buf, 32, "%d", g.NavLayer); g.OverlayDrawList.AddCircleFilled(p, 3.0f, col); g.OverlayDrawList.AddText(NULL, 13.0f, p + ImVec2(8,-4), col, buf); }
+    if (g.NavWindow) { ImU32 col = (g.NavWindow->HiddenFrames == 0) ? IM_COL32(255,0,255,255) : IM_COL32(255,0,0,255); ImVec2 p = NavCalcPreferredMousePos(); char buf[32]; ImFormatString(buf, 32, "%d", g.NavLayer); g.OverlayDrawList.AddCircleFilled(p, 3.0f, col); g.OverlayDrawList.AddText(NULL, 13.0f, p + ImVec2(8,-4), col, buf); }
 #endif
 }
 
@@ -3902,7 +3902,7 @@ static void AddWindowToDrawData(ImVector<ImDrawList*>* out_render_list, ImGuiWin
     for (int i = 0; i < window->DC.ChildWindows.Size; i++)
     {
         ImGuiWindow* child = window->DC.ChildWindows[i];
-        if (child->Active && child->HiddenFrames <= 0) // clipped children may have been marked not active
+        if (child->Active && child->HiddenFrames == 0) // clipped children may have been marked not active
             AddWindowToDrawData(out_render_list, child);
     }
 }
@@ -4070,10 +4070,10 @@ void ImGui::Render()
     for (int n = 0; n != g.Windows.Size; n++)
     {
         ImGuiWindow* window = g.Windows[n];
-        if (window->Active && window->HiddenFrames <= 0 && (window->Flags & ImGuiWindowFlags_ChildWindow) == 0 && window != window_to_render_front_most)
+        if (window->Active && window->HiddenFrames == 0 && (window->Flags & ImGuiWindowFlags_ChildWindow) == 0 && window != window_to_render_front_most)
             AddWindowToDrawDataSelectLayer(window);
     }
-    if (window_to_render_front_most && window_to_render_front_most->Active && window_to_render_front_most->HiddenFrames <= 0) // NavWindowingTarget is always temporarily displayed as the front-most window
+    if (window_to_render_front_most && window_to_render_front_most->Active && window_to_render_front_most->HiddenFrames == 0) // NavWindowingTarget is always temporarily displayed as the front-most window
         AddWindowToDrawDataSelectLayer(window_to_render_front_most);
     g.DrawDataBuilder.FlattenIntoSingleLayer();
 
@@ -4773,7 +4773,7 @@ void ImGui::BeginTooltipEx(ImGuiWindowFlags extra_flags, bool override_previous_
         if (ImGuiWindow* window = FindWindowByName(window_name))
             if (window->Active)
             {
-                // Hide previous tooltips. We can't easily "reset" the content of a window so we create a new one.
+                // Hide previous tooltip from being displayed. We can't easily "reset" the content of a window so we create a new one.
                 window->HiddenFrames = 1;
                 ImFormatString(window_name, IM_ARRAYSIZE(window_name), "##Tooltip_%02d", ++g.TooltipOverrideCount);
             }
@@ -5619,7 +5619,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
 
     // Update the Appearing flag
     bool window_just_activated_by_user = (window->LastFrameActive < current_frame - 1);   // Not using !WasActive because the implicit "Debug" window would always toggle off->on
-    const bool window_just_appearing_after_hidden_for_resize = (window->HiddenFrames == 1);
+    const bool window_just_appearing_after_hidden_for_resize = (window->HiddenFrames > 0);
     if (flags & ImGuiWindowFlags_Popup)
     {
         ImGuiPopupRef& popup_ref = g.OpenPopupStack[g.CurrentPopupStack.Size];
@@ -5775,7 +5775,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
         // Calculate auto-fit size, handle automatic resize
         const ImVec2 size_auto_fit = CalcSizeAutoFit(window, window->SizeContents);
         ImVec2 size_full_modified(FLT_MAX, FLT_MAX);
-        if (flags & ImGuiWindowFlags_AlwaysAutoResize && !window->Collapsed)
+        if ((flags & ImGuiWindowFlags_AlwaysAutoResize) && !window->Collapsed)
         {
             // Using SetNextWindowSize() overrides ImGuiWindowFlags_AlwaysAutoResize, so it can be used on tooltips/popups, etc.
             if (!window_size_x_set_by_api)
@@ -5785,7 +5785,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
         }
         else if (window->AutoFitFramesX > 0 || window->AutoFitFramesY > 0)
         {
-            // Auto-fit only grows during the first few frames
+            // Auto-fit may only grow window during the first few frames
             // We still process initial auto-fit on collapsed windows to get a window width, but otherwise don't honor ImGuiWindowFlags_AlwaysAutoResize when collapsed.
             if (!window_size_x_set_by_api && window->AutoFitFramesX > 0)
                 window->SizeFull.x = size_full_modified.x = window->AutoFitOnlyGrows ? ImMax(window->SizeFull.x, size_auto_fit.x) : size_auto_fit.x;