From 79d0f9a45d36656051a77a7b0837aa0318f81ee5 Mon Sep 17 00:00:00 2001
From: Normand Briere <nbriere@noware.ca>
Date: Sun, 09 Jun 2019 11:23:18 -0400
Subject: [PATCH] Undo/redo

---
 ObjEditor.java |  103 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 103 insertions(+), 0 deletions(-)

diff --git a/ObjEditor.java b/ObjEditor.java
index 1edfe37..05b548c 100644
--- a/ObjEditor.java
+++ b/ObjEditor.java
@@ -3207,10 +3207,112 @@
         {
             copy.remove(1);
         }
+        
         ResetModel();
         objEditor.refreshContents();
     }
     
+    Object3D graphs[] = new Object3D[10000];
+    int undoindex = 0;
+    
+    static public Object clone(Object o)
+    {
+        try
+        {
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            ObjectOutputStream out = new ObjectOutputStream(baos);
+
+            out.writeObject(o);
+
+            ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
+            ObjectInputStream in = new ObjectInputStream(bais);
+            Object obj = in.readObject();
+            in.close();
+            out.close();
+            return obj;
+        } catch (Exception e)
+        {
+            System.err.println(e);
+            return null;
+        }
+    }
+
+    public void Save()
+    {
+        if (true) return;
+        
+        //EditorFrame.m_MainFrame.requestFocusInWindow();
+        graphs[undoindex++] = (Object3D)clone(copy);
+
+        for (int i = undoindex; i < graphs.length; i++)
+        {
+            graphs[i] = null;
+        }
+
+        // test save
+        if (false)
+        {
+            try
+            {
+                FileOutputStream ostream = new FileOutputStream("save" + undoindex);
+                ObjectOutputStream p = new ObjectOutputStream(ostream);
+
+                p.writeObject(copy);
+                
+                p.flush();
+
+                ostream.close();
+            } catch (Exception e)
+            {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public void Undo()
+    {
+        if (undoindex == 0)
+        {
+            java.awt.Toolkit.getDefaultToolkit().beep();
+            return;
+        }
+
+        if (graphs[undoindex] == null)
+        {
+            Save();
+            undoindex -= 1;
+        }
+
+        undoindex -= 1;
+
+        copy = graphs[undoindex];
+        
+        cameraView.object = copy;
+        copy.Touch();
+        
+        ResetModel();
+        refreshContents();
+    }
+
+    public void Redo()
+    {
+        if (graphs[undoindex + 1] == null)
+        {
+            java.awt.Toolkit.getDefaultToolkit().beep();
+            return;
+        }
+
+        undoindex += 1;
+
+        copy = graphs[undoindex];
+
+        cameraView.object = copy;
+        copy.Touch();
+        
+        ResetModel();
+        refreshContents();
+    }
+
         void ImportGFD()
         {
             FileDialog browser = new FileDialog(objEditor.frame, "Import GrafreeD", FileDialog.LOAD);
@@ -3855,6 +3957,7 @@
 
     void makeSomething(Object3D thing, boolean resetmodel) // deselect)
     {
+        Save();
         //Tween.set(thing, 0).target(1).start(tweenManager);
         //Tween.to(thing, 0, 0.5f).target(0).start(tweenManager);
 //            if (thing instanceof GenericJointDemo)

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