Docking: Fixed node->HasCloseButton not honoring ImGuiDockNodeFlags_NoCloseButton in a floating node, leading to empty space at the right of tab-bars with those flags. (#2109)

imgui.cpp

@@ -12329,7 +12329,7 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
     {
         // [Automatic root or child nodes]
         node->EnableCloseButton = false;
-        node->HasCloseButton = (node->Windows.Size > 0) && (node_flags & ImGuiDockNodeFlags_NoWindowMenuButton) == 0;
+        node->HasCloseButton = (node->Windows.Size > 0) && (node_flags & ImGuiDockNodeFlags_NoCloseButton) == 0;
         node->HasWindowMenuButton = (node->Windows.Size > 0) && (node_flags & ImGuiDockNodeFlags_NoWindowMenuButton) == 0;
         for (int window_n = 0; window_n < node->Windows.Size; window_n++)
         {

imgui.h

@@ -1614,7 +1614,7 @@ struct ImGuiWindowClass
     ImGuiID             ParentViewportId;           // Hint for the platform back-end. If non-zero, the platform back-end can create a parent<>child relationship between the platform windows. Not conforming back-ends are free to e.g. parent every viewport to the main viewport or not.
     ImGuiViewportFlags  ViewportFlagsOverrideSet;   // Viewport flags to set when a window of this class owns a viewport. This allows you to enforce OS decoration or task bar icon, override the defaults on a per-window basis.
     ImGuiViewportFlags  ViewportFlagsOverrideClear; // Viewport flags to clear when a window of this class owns a viewport. This allows you to enforce OS decoration or task bar icon, override the defaults on a per-window basis.
-    bool                DockingAlwaysTabBar;        // Set to true to enforce windows of this class always having their own tab (equivalent of setting the global io.ConfigDockingAlwaysTabBar)
+    bool                DockingAlwaysTabBar;        // Set to true to enforce single floating windows of this class always having their own tab bar (equivalent of setting the global io.ConfigDockingAlwaysTabBar)
     bool                DockingAllowUnclassed;      // Set to true to allow windows of this class to be docked/merged with an unclassed window.
 
     ImGuiWindowClass() { ClassId = 0; ParentViewportId = 0; ViewportFlagsOverrideSet = ViewportFlagsOverrideClear = 0x00; DockingAlwaysTabBar = false; DockingAllowUnclassed = true; }