Docking: Added DockNodeFlagsOverrideSet/DockNodeFlagsOverrideClear (experimental)

imgui.cpp

@@ -12313,6 +12313,7 @@ static void ImGui::DockNodeUpdateVisibleFlagAndInactiveChilds(ImGuiDockNode* nod
         DockNodeUpdateVisibleFlagAndInactiveChilds(node->ChildNodes[1]);
 
     // Remove inactive windows
+    // Merge node flags overrides stored in windows
     for (int window_n = 0; window_n < node->Windows.Size; window_n++)
     {
         ImGuiWindow* window = node->Windows[window_n];
@@ -12336,6 +12337,11 @@ static void ImGui::DockNodeUpdateVisibleFlagAndInactiveChilds(ImGuiDockNode* nod
             DockNodeRemoveWindow(node, window, node->ID);
             window_n--;
         }
+        else
+        {
+            node->LocalFlags &= ~window->WindowClass.DockNodeFlagsOverrideClear;
+            node->LocalFlags |= window->WindowClass.DockNodeFlagsOverrideSet;
+        }
     }
 
     // Auto-hide tab bar option
@@ -12344,6 +12350,10 @@ static void ImGui::DockNodeUpdateVisibleFlagAndInactiveChilds(ImGuiDockNode* nod
         node->WantHiddenTabBarToggle = true;
     node->WantHiddenTabBarUpdate = false;
 
+    // Cancel toggling if we know our tab bar is enforced to be hidden at all times
+    if (node->WantHiddenTabBarToggle && node->VisibleWindow && (node->VisibleWindow->WindowClass.DockNodeFlagsOverrideSet & ImGuiDockNodeFlags_HiddenTabBar))
+        node->WantHiddenTabBarToggle = false;
+
     // Apply toggles at a single point of the frame (here!)
     if (node->Windows.Size > 1)
         node->LocalFlags &= ~ImGuiDockNodeFlags_HiddenTabBar;

imgui.h

@@ -1646,10 +1646,12 @@ 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.
+    ImGuiDockNodeFlags  DockNodeFlagsOverrideSet;   // [EXPERIMENTAL] Dock node flags to set when a window of this class is hosted by a dock node (it doesn't have to be selected!)
+    ImGuiDockNodeFlags  DockNodeFlagsOverrideClear; // [EXPERIMENTAL] 
     bool                DockingAlwaysTabBar;        // Set to true to enforce single floating windows of this class always having their own docking node (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; }
+    ImGuiWindowClass() { ClassId = 0; ParentViewportId = 0; ViewportFlagsOverrideSet = ViewportFlagsOverrideClear = 0x00; DockNodeFlagsOverrideSet = DockNodeFlagsOverrideClear = 0x00; DockingAlwaysTabBar = false; DockingAllowUnclassed = true; }
 };
 
 // Data payload for Drag and Drop operations: AcceptDragDropPayload(), GetDragDropPayload()