From 677a156e1f5190fd67e7f1f00fc96b9c1ba8371e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89rico=20Porto?= <ericoporto2008@gmail.com>
Date: Tue, 12 Nov 2024 21:20:57 -0300
Subject: [PATCH] Editor: allow drag and drop to WatchPanel

---
 .../GUI/WatchVariablesPanel.Designer.cs       |  3 ++
 Editor/AGS.Editor/GUI/WatchVariablesPanel.cs  | 47 +++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/Editor/AGS.Editor/GUI/WatchVariablesPanel.Designer.cs b/Editor/AGS.Editor/GUI/WatchVariablesPanel.Designer.cs
index bb11ac71d63..dbf844ab263 100644
--- a/Editor/AGS.Editor/GUI/WatchVariablesPanel.Designer.cs
+++ b/Editor/AGS.Editor/GUI/WatchVariablesPanel.Designer.cs
@@ -43,6 +43,7 @@ private void InitializeComponent()
             // 
             // listView1
             // 
+            this.listView1.AllowDrop = true;
             this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
             this.symbolHeader,
             this.typeHeader,
@@ -60,6 +61,8 @@ private void InitializeComponent()
             this.listView1.TabIndex = 0;
             this.listView1.UseCompatibleStateImageBehavior = false;
             this.listView1.View = System.Windows.Forms.View.Details;
+            this.listView1.DragDrop += new System.Windows.Forms.DragEventHandler(this.listView1_DragDrop);
+            this.listView1.DragEnter += new System.Windows.Forms.DragEventHandler(this.listView1_DragEnter);
             this.listView1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.listView1_KeyDown);
             this.listView1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.listView1_MouseUp);
             // 
diff --git a/Editor/AGS.Editor/GUI/WatchVariablesPanel.cs b/Editor/AGS.Editor/GUI/WatchVariablesPanel.cs
index 1ece58615b7..e0fdc5cd87e 100644
--- a/Editor/AGS.Editor/GUI/WatchVariablesPanel.cs
+++ b/Editor/AGS.Editor/GUI/WatchVariablesPanel.cs
@@ -522,5 +522,52 @@ private void WatchVariablesPanel_Load(object sender, EventArgs e)
                 Factory.GUIController.ColorThemes.Apply(LoadColorTheme);
             }
         }
+
+        private static string GetDraggedVar(DragEventArgs e)
+        {
+            string droppedWord = string.Empty;
+
+            try
+            {
+                // must be a text we got from somewhere, probably script editor
+                if (e.Data.GetDataPresent(DataFormats.Text))
+                {
+                    // Retrieve the text from the drag-and-drop data
+                    string droppedText = (string)e.Data.GetData(DataFormats.Text);
+
+                    if (!string.IsNullOrWhiteSpace(droppedText) && droppedText.IndexOfAny(new[] { ' ', '\n' }) == -1)
+                    {
+                        droppedWord = droppedText;
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                // do nothing
+            }
+
+            // TO-DO: make it actually select a valid variable somehow
+            return droppedWord;
+        }
+
+        private void listView1_DragDrop(object sender, DragEventArgs e)
+        {
+            string droppedVar = GetDraggedVar(e);
+            if (String.IsNullOrEmpty(droppedVar))
+                return;
+            AddVariableToWatchList(droppedVar);
+        }
+
+        private void listView1_DragEnter(object sender, DragEventArgs e)
+        {
+            string droppedVar = GetDraggedVar(e);
+            if (String.IsNullOrEmpty(droppedVar))
+            {
+                e.Effect = DragDropEffects.None;
+                return;
+            }
+
+            e.Effect = DragDropEffects.Copy; // Allow copy operation
+        }
     }
 }