Navigation: Collapsed window uses ImGuiCol_TitleBgActive when navigation is active (#323)

imgui.cpp

@@ -4622,8 +4622,9 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
         const float window_rounding = (flags & ImGuiWindowFlags_ChildWindow) ? style.ChildWindowRounding : style.WindowRounding;
         if (window->Collapsed)
         {
-            // Draw title bar only
-            RenderFrame(title_bar_rect.GetTL(), title_bar_rect.GetBR(),  GetColorU32(ImGuiCol_TitleBgCollapsed), true, window_rounding);
+            // Title bar only
+            const bool is_focused = g.FocusedWindow && window->RootNonPopupWindow == g.FocusedWindow->RootNonPopupWindow && !g.NavDisableHighlight;
+            RenderFrame(title_bar_rect.GetTL(), title_bar_rect.GetBR(),  GetColorU32(is_focused ? ImGuiCol_TitleBgActive : ImGuiCol_TitleBgCollapsed), true, window_rounding);
         }
         else
         {
@@ -4704,8 +4705,9 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
                 window->DrawList->AddRectFilled(window->Pos+ImVec2(0,window->TitleBarHeight()), window->Pos+window->Size, ColorConvertFloat4ToU32(bg_color), window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? 15 : 4|8);
 
             // Title bar
+            const bool is_focused = g.FocusedWindow && window->RootNonPopupWindow == g.FocusedWindow->RootNonPopupWindow;
             if (!(flags & ImGuiWindowFlags_NoTitleBar))
-                window->DrawList->AddRectFilled(title_bar_rect.GetTL(), title_bar_rect.GetBR(), GetColorU32((g.FocusedWindow && window->RootNonPopupWindow == g.FocusedWindow->RootNonPopupWindow) ? ImGuiCol_TitleBgActive : ImGuiCol_TitleBg), window_rounding, 1|2);
+                window->DrawList->AddRectFilled(title_bar_rect.GetTL(), title_bar_rect.GetBR(), GetColorU32(is_focused ? ImGuiCol_TitleBgActive : ImGuiCol_TitleBg), window_rounding, 1|2);
 
             // Menu bar
             if (flags & ImGuiWindowFlags_MenuBar)