fixed the issue in aligning child space

lib/pages/spaces_management/all_spaces/widgets/community_structure_widget.dart

@@ -336,6 +336,7 @@ class _CommunityStructureAreaState extends State<CommunityStructureArea> {
               }
               spaces.add(newSpace);
               _updateNodePosition(newSpace, newSpace.position);
+              realignTree();
             });
           },
         );
@@ -450,7 +451,6 @@ class _CommunityStructureAreaState extends State<CommunityStructureArea> {
 
   void _saveSpaces() {
     if (widget.selectedCommunity == null) {
-      debugPrint("No community selected for saving spaces.");
       return;
     }
 
@@ -530,34 +530,82 @@ class _CommunityStructureAreaState extends State<CommunityStructureArea> {
   }
 
   Offset getBalancedChildPosition(SpaceModel parent) {
-    int totalSiblings = parent.children.length + 1;
+    const double nodeWidth = 200;
-    double totalWidth = (totalSiblings - 1) * 250; // Horizontal spacing
+    const double verticalGap = 180;
-    double startX = parent.position.dx - (totalWidth / 2);
 
-    Offset position = Offset(startX + (parent.children.length * 250), parent.position.dy + 180);
+    if (parent.children.isEmpty) {
+      // First child → exactly center
+      return Offset(parent.position.dx, parent.position.dy + verticalGap);
+    } else {
+      // More children → arrange them spaced horizontally
+      double totalWidth = (parent.children.length) * (nodeWidth + 60);
+      double startX = parent.position.dx - (totalWidth / 2);
 
-    // Check for overlaps & adjust
+      double childX = startX + (parent.children.length * (nodeWidth + 60));
-    while (spaces.any((s) => (s.position - position).distance < 250)) {
+      return Offset(childX, parent.position.dy + verticalGap);
-      position = Offset(position.dx + 250, position.dy);
     }
-
-    return position;
   }
 
   void realignTree() {
-    void updatePositions(SpaceModel node, double x, double y) {
+    const double nodeWidth = 200;
-      node.position = Offset(x, y);
+    const double nodeHeight = 100;
+    const double horizontalGap = 60;
+    const double verticalGap = 180;
 
-      int numChildren = node.children.length;
+    double canvasRightEdge = 1000;
-      double childStartX = x - ((numChildren - 1) * 250) / 2;
+    double canvasBottomEdge = 1000;
 
-      for (int i = 0; i < numChildren; i++) {
+    double _calculateSubtreeWidth(SpaceModel node) {
-        updatePositions(node.children[i], childStartX + (i * 250), y + 180);
+      if (node.children.isEmpty) return nodeWidth;
+      double totalWidth = 0;
+      for (var child in node.children) {
+        totalWidth += _calculateSubtreeWidth(child) + horizontalGap;
+      }
+      return totalWidth - horizontalGap;
+    }
+
+    void _layoutTree(SpaceModel node, double startX, double y) {
+      double subtreeWidth = _calculateSubtreeWidth(node);
+      double centerX = startX + subtreeWidth / 2 - nodeWidth / 2;
+      node.position = Offset(centerX, y);
+
+      canvasRightEdge =
+          centerX + nodeWidth > canvasRightEdge ? centerX + nodeWidth : canvasRightEdge;
+      canvasBottomEdge = y + nodeHeight > canvasBottomEdge ? y + nodeHeight : canvasBottomEdge;
+
+      if (node.children.length == 1) {
+        final child = node.children.first;
+        double parentCenterX = node.position.dx + nodeWidth / 2;
+        double childX = parentCenterX - nodeWidth / 2;
+        double childY = y + verticalGap;
+
+        child.position = Offset(childX, childY);
+        _layoutTree(child, childX, childY);
+      } else {
+        double childX = startX;
+        for (var child in node.children) {
+          double childWidth = _calculateSubtreeWidth(child);
+          _layoutTree(child, childX, y + verticalGap);
+          childX += childWidth + horizontalGap;
+        }
       }
     }
 
-    if (spaces.isNotEmpty) {
+    final SpaceModel? root = spaces.firstWhere(
-      updatePositions(spaces.first, spaces.first.position.dx, spaces.first.position.dy);
+      (s) => s.parent == null,
+      orElse: () => spaces.first,
+    );
+
+    if (root != null) {
+      double totalTreeWidth = _calculateSubtreeWidth(root);
+      double startingX = (canvasWidth / 2) - (totalTreeWidth / 2);
+
+      _layoutTree(root, startingX, 100);
+
+      setState(() {
+        canvasWidth = canvasRightEdge + 200;
+        canvasHeight = canvasBottomEdge + 200;
+      });
     }
   }
 
@@ -650,38 +698,87 @@ class _CommunityStructureAreaState extends State<CommunityStructureArea> {
 
     /// **Find a new position ensuring no overlap**
     Offset getBalancedChildPosition(SpaceModel parent) {
-      int totalSiblings = parent.children.length + 1;
+      const double nodeWidth = 200;
-      double totalWidth = (totalSiblings - 1) * horizontalGap;
+      const double horizontalGap = 60;
-      double startX = parent.position.dx - (totalWidth / 2);
+      const double verticalGap = 180;
-      Offset position = Offset(
-          startX + (parent.children.length * horizontalGap), parent.position.dy + verticalGap);
 
-      // **Check for overlaps & adjust**
+      int numSiblings = parent.children.length;
-      while (spaces.any((s) => (s.position - position).distance < horizontalGap)) {
+      double totalWidth = numSiblings * (nodeWidth + horizontalGap);
-        position = Offset(position.dx + horizontalGap, position.dy);
-      }
 
-      print("🔹 New position for ${parent.name}: (${position.dx}, ${position.dy})");
+      // Calculate position directly beneath the parent, spaced horizontally
-      return position;
+      double x = parent.position.dx - (totalWidth / 2) + numSiblings * (nodeWidth + horizontalGap);
+      double y = parent.position.dy + verticalGap;
+
+      return Offset(x, y);
     }
 
     /// **Realign the entire tree after duplication**
     void realignTree() {
-      void updatePositions(SpaceModel node, double x, double y) {
+      const double nodeWidth = 200;
-        node.position = Offset(x, y);
+      const double nodeHeight = 100;
-        print("✅ Adjusted ${node.name} to (${x}, ${y})");
+      const double horizontalGap = 60;
+      const double verticalGap = 180;
 
-        int numChildren = node.children.length;
+      double canvasRightEdge = 1000;
-        double childStartX = x - ((numChildren - 1) * horizontalGap) / 2;
+      double canvasBottomEdge = 1000;
 
-        for (int i = 0; i < numChildren; i++) {
+      // Step 1: Calculate the width of any subtree
-          updatePositions(node.children[i], childStartX + (i * horizontalGap), y + verticalGap);
+      double _calculateSubtreeWidth(SpaceModel node) {
+        if (node.children.isEmpty) return nodeWidth;
+        double totalWidth = 0;
+        for (var child in node.children) {
+          totalWidth += _calculateSubtreeWidth(child) + horizontalGap;
+        }
+        return totalWidth - horizontalGap;
+      }
+
+      void _layoutTree(SpaceModel node, double startX, double y) {
+        double subtreeWidth = _calculateSubtreeWidth(node);
+        double centerX = startX + subtreeWidth / 2 - nodeWidth / 2;
+        node.position = Offset(centerX, y);
+
+        canvasRightEdge =
+            centerX + nodeWidth > canvasRightEdge ? centerX + nodeWidth : canvasRightEdge;
+        canvasBottomEdge = y + nodeHeight > canvasBottomEdge ? y + nodeHeight : canvasBottomEdge;
+
+        if (node.children.length == 1) {
+          final child = node.children.first;
+
+          double parentCenterX = node.position.dx + nodeWidth / 2;
+          double childX = parentCenterX - nodeWidth / 2;
+          double childY = y + verticalGap;
+
+          child.position = Offset(childX, childY);
+
+          _layoutTree(child, childX, childY);
+        } else {
+          double childX = startX;
+          for (var child in node.children) {
+            double childWidth = _calculateSubtreeWidth(child);
+            _layoutTree(child, childX, y + verticalGap);
+            childX += childWidth + horizontalGap;
+          }
         }
       }
 
-      if (spaces.isNotEmpty) {
+      // Step 3: Start centered
-        print("🔄 Realigning tree...");
+      final SpaceModel? root = spaces.firstWhere(
-        updatePositions(spaces.first, spaces.first.position.dx, spaces.first.position.dy);
+        (s) => s.parent == null,
+        orElse: () => spaces.first,
+      );
+
+      if (root != null) {
+        // Calculate total width of full tree
+        double totalTreeWidth = _calculateSubtreeWidth(root);
+
+        double startingX = (canvasWidth / 2) - (totalTreeWidth / 2);
+
+        _layoutTree(root, startingX, 100);
+
+        setState(() {
+          canvasWidth = canvasRightEdge + 200; // give breathing space
+          canvasHeight = canvasBottomEdge + 200;
+        });
       }
     }
 
@@ -692,8 +789,6 @@ class _CommunityStructureAreaState extends State<CommunityStructureArea> {
           : getBalancedChildPosition(duplicatedParent);
 
       final duplicatedName = SpaceHelper.generateUniqueSpaceName(original.name, spaces);
-      print(
-          "🟡 Duplicating ${original.name} → ${duplicatedName} at (${newPosition.dx}, ${newPosition.dy})");
 
       final duplicated = SpaceModel(
         name: duplicatedName,
@@ -722,7 +817,6 @@ class _CommunityStructureAreaState extends State<CommunityStructureArea> {
           duplicated.incomingConnection = newConnection;
           duplicatedParent.addOutgoingConnection(newConnection);
           duplicatedParent.children.add(duplicated);
-          print("🔗 Created connection: ${duplicatedParent.name} → ${duplicated.name}");
         }
 
         // **Recalculate the whole tree to avoid overlaps**
@@ -739,19 +833,14 @@ class _CommunityStructureAreaState extends State<CommunityStructureArea> {
 
     /// **Handle root duplication**
     if (space.parent == null) {
-      print("🟠 Duplicating root node: ${space.name}");
       SpaceModel duplicatedRoot = duplicateRecursive(space, null);
 
       setState(() {
         spaces.add(duplicatedRoot);
         realignTree();
       });
-
-      print("✅ Root duplication successful: ${duplicatedRoot.name}");
     } else {
       duplicateRecursive(space, space.parent);
     }
-
-    print("🟢 Finished duplication process for: ${space.name}");
   }
 }