1 files changed, 428 insertions, 428 deletions
diff --git a/src/gui/undocommands.cpp b/src/gui/undocommands.cpp
index 5525cb7..dc7a797 100644
--- a/src/gui/undocommands.cpp
+++ b/src/gui/undocommands.cpp
@@ -1,428 +1,428 @@
-/*
-    TikZiT - a GUI diagram editor for TikZ
-    Copyright (C) 2018 Aleks Kissinger
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-*/
-
-#include "undocommands.h"
-#include "nodeitem.h"
-#include "edgeitem.h"
-
-#include <QGraphicsView>
-
-GraphUpdateCommand::GraphUpdateCommand(TikzScene *scene, QUndoCommand *parent) : QUndoCommand(parent), _scene(scene)
-{
-}
-
-void GraphUpdateCommand::undo()
-{
-    _scene->tikzDocument()->refreshTikz();
-    //refreshSceneBounds does nothing
-    //_scene->refreshSceneBounds();
-    _scene->invalidate();
-}
-
-void GraphUpdateCommand::redo()
-{
-    _scene->tikzDocument()->refreshTikz();
-    //refreshSceneBounds does nothing
-    //_scene->refreshSceneBounds();
-    _scene->invalidate();
-}
-
-
-MoveCommand::MoveCommand(TikzScene *scene,
-                         QMap<Node*, QPointF> oldNodePositions,
-                         QMap<Node*, QPointF> newNodePositions,
-                         QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent),
-    _oldNodePositions(oldNodePositions),
-    _newNodePositions(newNodePositions)
-{}
-
-
-void MoveCommand::undo()
-{
-    foreach (NodeItem *ni, _scene->nodeItems()) {
-        if (_oldNodePositions.contains(ni->node())) {
-            ni->node()->setPoint(_oldNodePositions.value(ni->node()));
-            ni->readPos();
-        }
-    }
-
-    _scene->refreshAdjacentEdges(_oldNodePositions.keys());
-    GraphUpdateCommand::undo();
-}
-
-void MoveCommand::redo()
-{
-    foreach (NodeItem *ni, _scene->nodeItems()) {
-        if (_newNodePositions.contains(ni->node())) {
-            ni->node()->setPoint(_newNodePositions.value(ni->node()));
-            ni->readPos();
-        }
-    }
-
-    _scene->refreshAdjacentEdges(_newNodePositions.keys());
-    GraphUpdateCommand::redo();
-}
-
-EdgeBendCommand::EdgeBendCommand(TikzScene *scene, Edge *edge,
-                                 float oldWeight, int oldBend,
-                                 int oldInAngle, int oldOutAngle, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent),
-    _edge(edge),
-    _oldWeight(oldWeight), _oldBend(oldBend),
-    _oldInAngle(oldInAngle), _oldOutAngle(oldOutAngle)
-{
-    _newWeight = edge->weight();
-    _newBend = edge->bend();
-    _newInAngle = edge->inAngle();
-    _newOutAngle = edge->outAngle();
-}
-
-void EdgeBendCommand::undo()
-{
-    _edge->setWeight(_oldWeight);
-    _edge->setBend(_oldBend);
-    _edge->setInAngle(_oldInAngle);
-    _edge->setOutAngle(_oldOutAngle);
-
-    foreach(EdgeItem *ei, _scene->edgeItems()) {
-        if (ei->edge() == _edge) {
-            ei->readPos();
-            break;
-        }
-    }
-    GraphUpdateCommand::undo();
-}
-
-void EdgeBendCommand::redo()
-{
-    _edge->setWeight(_newWeight);
-    _edge->setBend(_newBend);
-    _edge->setInAngle(_newInAngle);
-    _edge->setOutAngle(_newOutAngle);
-
-    foreach(EdgeItem *ei, _scene->edgeItems()) {
-        if (ei->edge() == _edge) {
-            ei->readPos();
-            break;
-        }
-    }
-
-    GraphUpdateCommand::redo();
-}
-
-DeleteCommand::DeleteCommand(TikzScene *scene,
-                             QMap<int, Node *> deleteNodes,
-                             QMap<int, Edge *> deleteEdges,
-                             QSet<Edge *> selEdges, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent),
-    _deleteNodes(deleteNodes), _deleteEdges(deleteEdges), _selEdges(selEdges)
-{}
-
-void DeleteCommand::undo()
-{
-    for (auto it = _deleteNodes.begin(); it != _deleteNodes.end(); ++it) {
-        Node *n = it.value();
-        n->attachStyle(); // in case styles have changed
-        _scene->graph()->addNode(n, it.key());
-        NodeItem *ni = new NodeItem(n);
-        _scene->nodeItems().insert(n, ni);
-        _scene->addItem(ni);
-        ni->setSelected(true);
-    }
-
-    for (auto it = _deleteEdges.begin(); it != _deleteEdges.end(); ++it) {
-        Edge *e = it.value();
-		e->attachStyle();
-        _scene->graph()->addEdge(e, it.key());
-        EdgeItem *ei = new EdgeItem(e);
-        _scene->edgeItems().insert(e, ei);
-        _scene->addItem(ei);
-
-        if (_selEdges.contains(e)) ei->setSelected(true);
-    }
-
-    GraphUpdateCommand::undo();
-}
-
-void DeleteCommand::redo()
-{
-    foreach (Edge *e, _deleteEdges.values()) {
-        EdgeItem *ei = _scene->edgeItems()[e];
-        _scene->edgeItems().remove(e);
-        _scene->removeItem(ei);
-        delete ei;
-
-        _scene->graph()->removeEdge(e);
-    }
-
-    foreach (Node *n, _deleteNodes.values()) {
-        NodeItem *ni = _scene->nodeItems()[n];
-        _scene->nodeItems().remove(n);
-        _scene->removeItem(ni);
-        delete ni;
-
-        _scene->graph()->removeNode(n);
-    }
-
-    GraphUpdateCommand::redo();
-}
-
-AddNodeCommand::AddNodeCommand(TikzScene *scene, Node *node, QRectF newBounds, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent), _node(node), _oldBounds(_scene->sceneRect()), _newBounds(newBounds)
-{
-}
-
-void AddNodeCommand::undo()
-{
-    NodeItem *ni = _scene->nodeItems()[_node];
-    _scene->removeItem(ni);
-    _scene->nodeItems().remove(_node);
-    delete ni;
-
-    _scene->graph()->removeNode(_node);
-
-    //_scene->setBounds(_oldBounds);
-
-    GraphUpdateCommand::undo();
-}
-
-void AddNodeCommand::redo()
-{
-    _node->attachStyle(); // do for every redo, in case styles have changed
-    _scene->graph()->addNode(_node);
-    NodeItem *ni = new NodeItem(_node);
-    _scene->nodeItems().insert(_node, ni);
-    _scene->addItem(ni);
-
-    //_scene->setBounds(_newBounds);
-
-    GraphUpdateCommand::redo();
-}
-
-AddEdgeCommand::AddEdgeCommand(TikzScene *scene, Edge *edge, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent), _edge(edge)
-{
-}
-
-void AddEdgeCommand::undo()
-{
-    EdgeItem *ei = _scene->edgeItems()[_edge];
-    _scene->removeItem(ei);
-    _scene->edgeItems().remove(_edge);
-    delete ei;
-
-    _scene->graph()->removeEdge(_edge);
-    GraphUpdateCommand::undo();
-}
-
-void AddEdgeCommand::redo()
-{
-	_edge->attachStyle(); // do for every redo, in case styles have changed
-    _scene->graph()->addEdge(_edge);
-    EdgeItem *ei = new EdgeItem(_edge);
-    _scene->edgeItems().insert(_edge, ei);
-    _scene->addItem(ei);
-
-	// TODO: deal consistently with stacking order
-    // edges should always be stacked below nodes
-    if (!_scene->graph()->nodes().isEmpty()) {
-        ei->stackBefore(_scene->nodeItems()[_scene->graph()->nodes().first()]);
-    }
-
-    GraphUpdateCommand::redo();
-}
-
-ChangeEdgeModeCommand::ChangeEdgeModeCommand(TikzScene *scene, Edge *edge, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent), _edge(edge)
-{
-}
-
-void ChangeEdgeModeCommand::undo()
-{
-    // FIXME: this act strangely sometimes
-	_edge->setBasicBendMode(!_edge->basicBendMode());
-    _scene->edgeItems()[_edge]->readPos();
-    GraphUpdateCommand::undo();
-}
-
-void ChangeEdgeModeCommand::redo()
-{
-    _edge->setBasicBendMode(!_edge->basicBendMode());
-    _scene->edgeItems()[_edge]->readPos();
-    GraphUpdateCommand::redo();
-}
-
-ApplyStyleToNodesCommand::ApplyStyleToNodesCommand(TikzScene *scene, QString style, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent), _style(style), _oldStyles()
-{
-    foreach (QGraphicsItem *it, scene->selectedItems()) {
-        if (NodeItem *ni = dynamic_cast<NodeItem*>(it)) {
-            _oldStyles.insert(ni->node(), ni->node()->styleName());
-        }
-    }
-}
-
-void ApplyStyleToNodesCommand::undo()
-{
-    foreach (Node *n, _oldStyles.keys()) {
-        n->setStyleName(_oldStyles[n]);
-        n->attachStyle();
-    }
-
-    GraphUpdateCommand::undo();
-}
-
-void ApplyStyleToNodesCommand::redo()
-{
-    foreach (Node *n, _oldStyles.keys()) {
-        n->setStyleName(_style);
-        n->attachStyle();
-    }
-    GraphUpdateCommand::redo();
-}
-
-ApplyStyleToEdgesCommand::ApplyStyleToEdgesCommand(TikzScene *scene, QString style, QUndoCommand *parent) :
-	GraphUpdateCommand(scene, parent), _style(style), _oldStyles()
-{
-	foreach(QGraphicsItem *it, scene->selectedItems()) {
-		if (EdgeItem *ei = dynamic_cast<EdgeItem*>(it)) {
-			_oldStyles.insert(ei->edge(), ei->edge()->styleName());
-		}
-	}
-}
-
-void ApplyStyleToEdgesCommand::undo()
-{
-	foreach(Edge *e, _oldStyles.keys()) {
-		e->setStyleName(_oldStyles[e]);
-		e->attachStyle();
-	}
-
-	GraphUpdateCommand::undo();
-}
-
-void ApplyStyleToEdgesCommand::redo()
-{
-	foreach(Edge *e, _oldStyles.keys()) {
-		e->setStyleName(_style);
-		e->attachStyle();
-	}
-	GraphUpdateCommand::redo();
-}
-
-PasteCommand::PasteCommand(TikzScene *scene, Graph *graph, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent), _graph(graph)
-{
-	scene->getSelection(_oldSelectedNodes, _oldSelectedEdges);
-}
-
-void PasteCommand::undo()
-{
-    _scene->clearSelection();
-
-    foreach (Edge *e, _graph->edges()) {
-        EdgeItem *ei = _scene->edgeItems()[e];
-        _scene->edgeItems().remove(e);
-        _scene->removeItem(ei);
-        delete ei;
-
-        _scene->graph()->removeEdge(e);
-    }
-
-    foreach (Node *n, _graph->nodes()) {
-        NodeItem *ni = _scene->nodeItems()[n];
-        _scene->nodeItems().remove(n);
-        _scene->removeItem(ni);
-        delete ni;
-
-        _scene->graph()->removeNode(n);
-    }
-
-	foreach(Node *n, _oldSelectedNodes) _scene->nodeItems()[n]->setSelected(true);
-	foreach(Edge *e, _oldSelectedEdges) _scene->edgeItems()[e]->setSelected(true);
-
-    GraphUpdateCommand::undo();
-}
-
-void PasteCommand::redo()
-{
-    _scene->clearSelection();
-    _scene->graph()->insertGraph(_graph);
-
-    foreach (Edge *e, _graph->edges()) {
-		e->attachStyle(); // in case styles have changed
-        EdgeItem *ei = new EdgeItem(e);
-        _scene->edgeItems().insert(e, ei);
-        _scene->addItem(ei);
-    }
-
-    foreach (Node *n, _graph->nodes()) {
-        n->attachStyle(); // in case styles have changed
-        NodeItem *ni = new NodeItem(n);
-        _scene->nodeItems().insert(n, ni);
-        _scene->addItem(ni);
-        ni->setSelected(true);
-    }
-
-    GraphUpdateCommand::redo();
-}
-
-ChangeLabelCommand::ChangeLabelCommand(TikzScene *scene, Graph *graph, QMap<Node *, QString> oldLabels, QString newLabel, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent), _oldLabels(oldLabels), _newLabel(newLabel)
-{
-}
-
-void ChangeLabelCommand::undo()
-{
-    foreach (Node *n, _oldLabels.keys()) {
-        n->setLabel(_oldLabels[n]);
-		NodeItem *ni = _scene->nodeItems()[n];
-		if (ni != 0) ni->updateBounds();
-    }
-
-    GraphUpdateCommand::undo();
-}
-
-void ChangeLabelCommand::redo()
-{
-    foreach (Node *n, _oldLabels.keys()) {
-        n->setLabel(_newLabel);
-		NodeItem *ni = _scene->nodeItems()[n];
-		if (ni != 0) ni->updateBounds();
-    }
-
-    GraphUpdateCommand::redo();
-}
-
-ReplaceGraphCommand::ReplaceGraphCommand(TikzScene *scene, Graph *oldGraph, Graph *newGraph, QUndoCommand *parent) :
-    GraphUpdateCommand(scene, parent), _oldGraph(oldGraph), _newGraph(newGraph)
-{
-}
-
-void ReplaceGraphCommand::undo()
-{
-    _scene->tikzDocument()->setGraph(_oldGraph);
-    _scene->graphReplaced();
-}
-
-void ReplaceGraphCommand::redo()
-{
-    _scene->tikzDocument()->setGraph(_newGraph);
-    _scene->graphReplaced();
-}
+/*
+    TikZiT - a GUI diagram editor for TikZ
+    Copyright (C) 2018 Aleks Kissinger
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include "undocommands.h"
+#include "nodeitem.h"
+#include "edgeitem.h"
+
+#include <QGraphicsView>
+
+GraphUpdateCommand::GraphUpdateCommand(TikzScene *scene, QUndoCommand *parent) : QUndoCommand(parent), _scene(scene)
+{
+}
+
+void GraphUpdateCommand::undo()
+{
+    _scene->tikzDocument()->refreshTikz();
+    //refreshSceneBounds does nothing
+    //_scene->refreshSceneBounds();
+    _scene->invalidate();
+}
+
+void GraphUpdateCommand::redo()
+{
+    _scene->tikzDocument()->refreshTikz();
+    //refreshSceneBounds does nothing
+    //_scene->refreshSceneBounds();
+    _scene->invalidate();
+}
+
+
+MoveCommand::MoveCommand(TikzScene *scene,
+                         QMap<Node*, QPointF> oldNodePositions,
+                         QMap<Node*, QPointF> newNodePositions,
+                         QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent),
+    _oldNodePositions(oldNodePositions),
+    _newNodePositions(newNodePositions)
+{}
+
+
+void MoveCommand::undo()
+{
+    foreach (NodeItem *ni, _scene->nodeItems()) {
+        if (_oldNodePositions.contains(ni->node())) {
+            ni->node()->setPoint(_oldNodePositions.value(ni->node()));
+            ni->readPos();
+        }
+    }
+
+    _scene->refreshAdjacentEdges(_oldNodePositions.keys());
+    GraphUpdateCommand::undo();
+}
+
+void MoveCommand::redo()
+{
+    foreach (NodeItem *ni, _scene->nodeItems()) {
+        if (_newNodePositions.contains(ni->node())) {
+            ni->node()->setPoint(_newNodePositions.value(ni->node()));
+            ni->readPos();
+        }
+    }
+
+    _scene->refreshAdjacentEdges(_newNodePositions.keys());
+    GraphUpdateCommand::redo();
+}
+
+EdgeBendCommand::EdgeBendCommand(TikzScene *scene, Edge *edge,
+                                 float oldWeight, int oldBend,
+                                 int oldInAngle, int oldOutAngle, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent),
+    _edge(edge),
+    _oldWeight(oldWeight), _oldBend(oldBend),
+    _oldInAngle(oldInAngle), _oldOutAngle(oldOutAngle)
+{
+    _newWeight = edge->weight();
+    _newBend = edge->bend();
+    _newInAngle = edge->inAngle();
+    _newOutAngle = edge->outAngle();
+}
+
+void EdgeBendCommand::undo()
+{
+    _edge->setWeight(_oldWeight);
+    _edge->setBend(_oldBend);
+    _edge->setInAngle(_oldInAngle);
+    _edge->setOutAngle(_oldOutAngle);
+
+    foreach(EdgeItem *ei, _scene->edgeItems()) {
+        if (ei->edge() == _edge) {
+            ei->readPos();
+            break;
+        }
+    }
+    GraphUpdateCommand::undo();
+}
+
+void EdgeBendCommand::redo()
+{
+    _edge->setWeight(_newWeight);
+    _edge->setBend(_newBend);
+    _edge->setInAngle(_newInAngle);
+    _edge->setOutAngle(_newOutAngle);
+
+    foreach(EdgeItem *ei, _scene->edgeItems()) {
+        if (ei->edge() == _edge) {
+            ei->readPos();
+            break;
+        }
+    }
+
+    GraphUpdateCommand::redo();
+}
+
+DeleteCommand::DeleteCommand(TikzScene *scene,
+                             QMap<int, Node *> deleteNodes,
+                             QMap<int, Edge *> deleteEdges,
+                             QSet<Edge *> selEdges, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent),
+    _deleteNodes(deleteNodes), _deleteEdges(deleteEdges), _selEdges(selEdges)
+{}
+
+void DeleteCommand::undo()
+{
+    for (auto it = _deleteNodes.begin(); it != _deleteNodes.end(); ++it) {
+        Node *n = it.value();
+        n->attachStyle(); // in case styles have changed
+        _scene->graph()->addNode(n, it.key());
+        NodeItem *ni = new NodeItem(n);
+        _scene->nodeItems().insert(n, ni);
+        _scene->addItem(ni);
+        ni->setSelected(true);
+    }
+
+    for (auto it = _deleteEdges.begin(); it != _deleteEdges.end(); ++it) {
+        Edge *e = it.value();
+		e->attachStyle();
+        _scene->graph()->addEdge(e, it.key());
+        EdgeItem *ei = new EdgeItem(e);
+        _scene->edgeItems().insert(e, ei);
+        _scene->addItem(ei);
+
+        if (_selEdges.contains(e)) ei->setSelected(true);
+    }
+
+    GraphUpdateCommand::undo();
+}
+
+void DeleteCommand::redo()
+{
+    foreach (Edge *e, _deleteEdges.values()) {
+        EdgeItem *ei = _scene->edgeItems()[e];
+        _scene->edgeItems().remove(e);
+        _scene->removeItem(ei);
+        delete ei;
+
+        _scene->graph()->removeEdge(e);
+    }
+
+    foreach (Node *n, _deleteNodes.values()) {
+        NodeItem *ni = _scene->nodeItems()[n];
+        _scene->nodeItems().remove(n);
+        _scene->removeItem(ni);
+        delete ni;
+
+        _scene->graph()->removeNode(n);
+    }
+
+    GraphUpdateCommand::redo();
+}
+
+AddNodeCommand::AddNodeCommand(TikzScene *scene, Node *node, QRectF newBounds, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent), _node(node), _oldBounds(_scene->sceneRect()), _newBounds(newBounds)
+{
+}
+
+void AddNodeCommand::undo()
+{
+    NodeItem *ni = _scene->nodeItems()[_node];
+    _scene->removeItem(ni);
+    _scene->nodeItems().remove(_node);
+    delete ni;
+
+    _scene->graph()->removeNode(_node);
+
+    //_scene->setBounds(_oldBounds);
+
+    GraphUpdateCommand::undo();
+}
+
+void AddNodeCommand::redo()
+{
+    _node->attachStyle(); // do for every redo, in case styles have changed
+    _scene->graph()->addNode(_node);
+    NodeItem *ni = new NodeItem(_node);
+    _scene->nodeItems().insert(_node, ni);
+    _scene->addItem(ni);
+
+    //_scene->setBounds(_newBounds);
+
+    GraphUpdateCommand::redo();
+}
+
+AddEdgeCommand::AddEdgeCommand(TikzScene *scene, Edge *edge, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent), _edge(edge)
+{
+}
+
+void AddEdgeCommand::undo()
+{
+    EdgeItem *ei = _scene->edgeItems()[_edge];
+    _scene->removeItem(ei);
+    _scene->edgeItems().remove(_edge);
+    delete ei;
+
+    _scene->graph()->removeEdge(_edge);
+    GraphUpdateCommand::undo();
+}
+
+void AddEdgeCommand::redo()
+{
+	_edge->attachStyle(); // do for every redo, in case styles have changed
+    _scene->graph()->addEdge(_edge);
+    EdgeItem *ei = new EdgeItem(_edge);
+    _scene->edgeItems().insert(_edge, ei);
+    _scene->addItem(ei);
+
+	// TODO: deal consistently with stacking order
+    // edges should always be stacked below nodes
+    if (!_scene->graph()->nodes().isEmpty()) {
+        ei->stackBefore(_scene->nodeItems()[_scene->graph()->nodes().first()]);
+    }
+
+    GraphUpdateCommand::redo();
+}
+
+ChangeEdgeModeCommand::ChangeEdgeModeCommand(TikzScene *scene, Edge *edge, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent), _edge(edge)
+{
+}
+
+void ChangeEdgeModeCommand::undo()
+{
+    // FIXME: this act strangely sometimes
+	_edge->setBasicBendMode(!_edge->basicBendMode());
+    _scene->edgeItems()[_edge]->readPos();
+    GraphUpdateCommand::undo();
+}
+
+void ChangeEdgeModeCommand::redo()
+{
+    _edge->setBasicBendMode(!_edge->basicBendMode());
+    _scene->edgeItems()[_edge]->readPos();
+    GraphUpdateCommand::redo();
+}
+
+ApplyStyleToNodesCommand::ApplyStyleToNodesCommand(TikzScene *scene, QString style, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent), _style(style), _oldStyles()
+{
+    foreach (QGraphicsItem *it, scene->selectedItems()) {
+        if (NodeItem *ni = dynamic_cast<NodeItem*>(it)) {
+            _oldStyles.insert(ni->node(), ni->node()->styleName());
+        }
+    }
+}
+
+void ApplyStyleToNodesCommand::undo()
+{
+    foreach (Node *n, _oldStyles.keys()) {
+        n->setStyleName(_oldStyles[n]);
+        n->attachStyle();
+    }
+
+    GraphUpdateCommand::undo();
+}
+
+void ApplyStyleToNodesCommand::redo()
+{
+    foreach (Node *n, _oldStyles.keys()) {
+        n->setStyleName(_style);
+        n->attachStyle();
+    }
+    GraphUpdateCommand::redo();
+}
+
+ApplyStyleToEdgesCommand::ApplyStyleToEdgesCommand(TikzScene *scene, QString style, QUndoCommand *parent) :
+	GraphUpdateCommand(scene, parent), _style(style), _oldStyles()
+{
+	foreach(QGraphicsItem *it, scene->selectedItems()) {
+		if (EdgeItem *ei = dynamic_cast<EdgeItem*>(it)) {
+			_oldStyles.insert(ei->edge(), ei->edge()->styleName());
+		}
+	}
+}
+
+void ApplyStyleToEdgesCommand::undo()
+{
+	foreach(Edge *e, _oldStyles.keys()) {
+		e->setStyleName(_oldStyles[e]);
+		e->attachStyle();
+	}
+
+	GraphUpdateCommand::undo();
+}
+
+void ApplyStyleToEdgesCommand::redo()
+{
+	foreach(Edge *e, _oldStyles.keys()) {
+		e->setStyleName(_style);
+		e->attachStyle();
+	}
+	GraphUpdateCommand::redo();
+}
+
+PasteCommand::PasteCommand(TikzScene *scene, Graph *graph, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent), _graph(graph)
+{
+	scene->getSelection(_oldSelectedNodes, _oldSelectedEdges);
+}
+
+void PasteCommand::undo()
+{
+    _scene->clearSelection();
+
+    foreach (Edge *e, _graph->edges()) {
+        EdgeItem *ei = _scene->edgeItems()[e];
+        _scene->edgeItems().remove(e);
+        _scene->removeItem(ei);
+        delete ei;
+
+        _scene->graph()->removeEdge(e);
+    }
+
+    foreach (Node *n, _graph->nodes()) {
+        NodeItem *ni = _scene->nodeItems()[n];
+        _scene->nodeItems().remove(n);
+        _scene->removeItem(ni);
+        delete ni;
+
+        _scene->graph()->removeNode(n);
+    }
+
+	foreach(Node *n, _oldSelectedNodes) _scene->nodeItems()[n]->setSelected(true);
+	foreach(Edge *e, _oldSelectedEdges) _scene->edgeItems()[e]->setSelected(true);
+
+    GraphUpdateCommand::undo();
+}
+
+void PasteCommand::redo()
+{
+    _scene->clearSelection();
+    _scene->graph()->insertGraph(_graph);
+
+    foreach (Edge *e, _graph->edges()) {
+		e->attachStyle(); // in case styles have changed
+        EdgeItem *ei = new EdgeItem(e);
+        _scene->edgeItems().insert(e, ei);
+        _scene->addItem(ei);
+    }
+
+    foreach (Node *n, _graph->nodes()) {
+        n->attachStyle(); // in case styles have changed
+        NodeItem *ni = new NodeItem(n);
+        _scene->nodeItems().insert(n, ni);
+        _scene->addItem(ni);
+        ni->setSelected(true);
+    }
+
+    GraphUpdateCommand::redo();
+}
+
+ChangeLabelCommand::ChangeLabelCommand(TikzScene *scene, Graph *graph, QMap<Node *, QString> oldLabels, QString newLabel, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent), _oldLabels(oldLabels), _newLabel(newLabel)
+{
+}
+
+void ChangeLabelCommand::undo()
+{
+    foreach (Node *n, _oldLabels.keys()) {
+        n->setLabel(_oldLabels[n]);
+		NodeItem *ni = _scene->nodeItems()[n];
+		if (ni != 0) ni->updateBounds();
+    }
+
+    GraphUpdateCommand::undo();
+}
+
+void ChangeLabelCommand::redo()
+{
+    foreach (Node *n, _oldLabels.keys()) {
+        n->setLabel(_newLabel);
+		NodeItem *ni = _scene->nodeItems()[n];
+		if (ni != 0) ni->updateBounds();
+    }
+
+    GraphUpdateCommand::redo();
+}
+
+ReplaceGraphCommand::ReplaceGraphCommand(TikzScene *scene, Graph *oldGraph, Graph *newGraph, QUndoCommand *parent) :
+    GraphUpdateCommand(scene, parent), _oldGraph(oldGraph), _newGraph(newGraph)
+{
+}
+
+void ReplaceGraphCommand::undo()
+{
+    _scene->tikzDocument()->setGraph(_oldGraph);
+    _scene->graphReplaced();
+}
+
+void ReplaceGraphCommand::redo()
+{
+    _scene->tikzDocument()->setGraph(_newGraph);
+    _scene->graphReplaced();
+}