From a1b59c9843e54f84d6ce69e41242bf752902ba2b Mon Sep 17 00:00:00 2001
From: Atilla Lonny <atillabyte@null.net>
Date: Sun, 25 Sep 2022 19:15:57 -0400
Subject: [PATCH] Fix dragged inventory item from being rendered prematurely

---
 .../HUD/Inventory/InventoryPanelItem.cs       | 37 +++++++++++++++++--
 1 file changed, 33 insertions(+), 4 deletions(-)

diff --git a/EndlessClient/HUD/Inventory/InventoryPanelItem.cs b/EndlessClient/HUD/Inventory/InventoryPanelItem.cs
index 667c7a50f..06ba3e9c1 100644
--- a/EndlessClient/HUD/Inventory/InventoryPanelItem.cs
+++ b/EndlessClient/HUD/Inventory/InventoryPanelItem.cs
@@ -48,9 +48,10 @@ public class ItemDragCompletedEventArgs
         // Ru Paul's drag properties
         private bool _beingDragged;
         private Vector2 _oldOffset;
+        private bool dragItemPositioned;
 
         private bool MousePressed => CurrentMouseState.LeftButton == ButtonState.Pressed && PreviousMouseState.LeftButton == ButtonState.Released;
-        
+
         private bool MouseReleased => CurrentMouseState.LeftButton == ButtonState.Released && PreviousMouseState.LeftButton == ButtonState.Pressed;
 
         private bool MouseHeld => CurrentMouseState.LeftButton == ButtonState.Pressed && PreviousMouseState.LeftButton == ButtonState.Pressed;
@@ -216,6 +217,7 @@ protected override void OnUpdateControl(GameTime gameTime)
                         else
                             DrawPosition = GetPosition(Slot);
 
+                        dragItemPositioned = false;
                         _beingDragged = false;
                         _nameLabel.Visible = false;
                     }
@@ -229,6 +231,7 @@ protected override void OnDrawControl(GameTime gameTime)
         {
             _spriteBatch.Begin();
 
+            // draw highlighted area
             if (MouseOver)
             {
                 if (!_beingDragged || InventoryGridArea.Contains(CurrentMouseState.Position))
@@ -244,10 +247,36 @@ protected override void OnDrawControl(GameTime gameTime)
                 }
             }
 
-            _spriteBatch.Draw(_itemGraphic, DrawPositionWithParentOffset, Color.FromNonPremultiplied(255, 255, 255, _beingDragged ? 128 : 255));
+            if (_beingDragged)
+            {
+                // slot based on current mouse position if being dragged
+                var currentSlot = GetCurrentSlotBasedOnPosition();
+                var drawPosition = GetPosition(currentSlot) + (_beingDragged ? _oldOffset : ImmediateParent.DrawPositionWithParentOffset);
 
-            _spriteBatch.End();
+                if (!dragItemPositioned)
+                {
+                    if (InventoryGridArea.Contains(DrawArea.WithPosition(drawPosition)))
+                    {
+                        dragItemPositioned = true;
+                    }
+                }
 
+                if (dragItemPositioned)
+                {
+                    _spriteBatch.Draw(_itemGraphic, DrawPositionWithParentOffset, Color.FromNonPremultiplied(255, 255, 255, _beingDragged ? 128 : 255));
+                }
+
+                if (InventoryGridArea.Contains(DrawArea.WithPosition(drawPosition)))
+                {
+                    _spriteBatch.Draw(_itemGraphic, _beingDragged ? (DrawPositionWithParentOffset) : DrawPositionWithParentOffset, Color.FromNonPremultiplied(255, 255, 255, _beingDragged ? 128 : 255));
+                }
+            }
+            else
+            {
+                _spriteBatch.Draw(_itemGraphic, _beingDragged ? (DrawPositionWithParentOffset) : DrawPositionWithParentOffset, Color.FromNonPremultiplied(255, 255, 255, _beingDragged ? 128 : 255));
+            }
+
+            _spriteBatch.End();
             base.OnDrawControl(gameTime);
         }
 
@@ -273,7 +302,7 @@ private void UpdateNameLabelPosition()
 
             if (actualPosition.X + _nameLabel.DrawAreaWithParentOffset.Width + DrawArea.Width > InventoryGridArea.Width)
             {
-                _nameLabel.DrawPosition = new Vector2(actualPosition.X -_nameLabel.DrawArea.Width, actualPosition.Y);
+                _nameLabel.DrawPosition = new Vector2(actualPosition.X - _nameLabel.DrawArea.Width, actualPosition.Y);
             }
             else
             {