Undo and Redo Operations Functional, with some caveats

2018-12-01 19:41:40 -08:00
parent 92249cac8f
commit 17b1e56180
13 changed files with 563 additions and 81 deletions
@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using System.ComponentModel;
+using QURO;
+
+namespace SpriteMapEditor.SpriteMapModifications
+{
+    public static class ModHelper
+    {
+        public static void DoModificationWithSelectionTracking(SpriteMapModifications.ISpriteMapModification mod, ListBox listBox)
+        {
+            mod.SetPreChangeSelection(GetSelectionList(listBox));
+            mod.Do();
+            mod.SetPostChangeSelection(GetSelectionList(listBox));
+        }
+
+        public static void UndoAndRestoreSelection(SpriteMapModifications.ISpriteMapModification mod, ListBox listBox)
+        {
+            mod.Undo();
+            SelectFromList(listBox, mod.GetPreChangeSelection());
+        }
+
+        public static void RedoAndRestoreSelection(SpriteMapModifications.ISpriteMapModification mod, ListBox listBox)
+        {
+            mod.Do();
+            SelectFromList(listBox, mod.GetPostChangeSelection());
+        }
+
+        public static List<int> GetSelectionList(ListBox listBox)
+        {
+            List<int> result = new List<int>();
+            foreach(int currentIndex in listBox.SelectedIndices)
+            {
+                result.Add(currentIndex);
+            }
+            return result;
+        }
+
+        public static void SelectFromList(ListBox listBox, List<int> newSelection)
+        {
+            listBox.SelectedIndices.Clear();
+            var source = (BindingList<SpriteMapRegion>)listBox.DataSource;
+            foreach (int currentIndex in newSelection)
+            {
+                if(currentIndex < source.Count)
+                    listBox.SelectedIndex = currentIndex;
+            }
+        }
+    }
+}