fix: 🩹 separated code of tooltip position delegate (#516)

Author: Sahil-Simform

lib/src/enum.dart

@@ -69,6 +69,19 @@ enum TooltipPosition {
 
   bool get isHorizontal => isRight || isLeft;
   bool get isVertical => isTop || isBottom;
+
+  TooltipPosition get opposite {
+    switch (this) {
+      case TooltipPosition.left:
+        return TooltipPosition.right;
+      case TooltipPosition.right:
+        return TooltipPosition.left;
+      case TooltipPosition.top:
+        return TooltipPosition.bottom;
+      case TooltipPosition.bottom:
+        return TooltipPosition.top;
+    }
+  }
 }
 
 enum TooltipActionPosition {

lib/src/tooltip/render_object_manager.dart

@@ -19,6 +19,9 @@ class RenderObjectManager {
 
   static Map<TooltipLayoutSlot, RenderObjectManager> renderObjects = {};
 
+  /// Clears renderObjects map
+  static void clear() => renderObjects.clear();
+
   /// Performs dry layout to calculate the preferred size without actually laying out
   Size performDryLayout(BoxConstraints constraints) {
     renderConstraints = constraints;
@@ -29,13 +32,19 @@ class RenderObjectManager {
   /// Performs actual layout on the RenderBox
   void performLayout(BoxConstraints constraints, {bool parentUsesSize = true}) {
     customRenderBox.layout(constraints, parentUsesSize: parentUsesSize);
+    dryLayoutSize = customRenderBox.size;
   }
 
   /// Gets the current size of the RenderBox
   Size get size => dryLayoutSize ?? customRenderBox.size;
 
   Offset get getOffset => Offset(xOffset ?? 0, yOffset ?? 0);
 
+  MultiChildLayoutParentData get layoutParentData {
+    assert(customRenderBox.parentData is MultiChildLayoutParentData);
+    return customRenderBox.parentData! as MultiChildLayoutParentData;
+  }
+
   /// Sets the position of the RenderBox
   void setOffset(double x, double y) {
     xOffset = x;