From 708011ca445e6096d693bde77b63b43b9de78e54 Mon Sep 17 00:00:00 2001
From: Aleks Kissinger <aleks0@gmail.com>
Date: Mon, 18 Dec 2017 17:59:56 +0000
Subject: adding node position tracking for undo

---
 tikzit/src/gui/undocommands.cpp | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

(limited to 'tikzit/src/gui/undocommands.cpp')

diff --git a/tikzit/src/gui/undocommands.cpp b/tikzit/src/gui/undocommands.cpp
index 38f7569..6d48fc4 100644
--- a/tikzit/src/gui/undocommands.cpp
+++ b/tikzit/src/gui/undocommands.cpp
@@ -1,16 +1,29 @@
 #include "undocommands.h"
 
-MoveCommand::MoveCommand(TikzScene *scene, QUndoCommand *parent) : QUndoCommand(parent)
+MoveCommand::MoveCommand(TikzScene *scene,
+                         QMap<Node*, QPointF> oldNodePositions,
+                         QMap<Node*, QPointF> newNodePositions,
+                         QUndoCommand *parent) :
+    QUndoCommand(parent),
+    _scene(scene),
+    _oldNodePositions(oldNodePositions),
+    _newNodePositions(newNodePositions)
 {
-    _scene = scene;
 }
 
+
 void MoveCommand::undo()
 {
-
+    foreach (NodeItem *ni, _scene->nodeItems()) {
+        if (_oldNodePositions.contains(ni->node()))
+            ni->node()->setPoint(_oldNodePositions.value(ni->node()));
+    }
 }
 
 void MoveCommand::redo()
 {
-
+    foreach (NodeItem *ni, _scene->nodeItems()) {
+        if (_newNodePositions.contains(ni->node()))
+            ni->node()->setPoint(_newNodePositions.value(ni->node()));
+    }
 }
-- 
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