From 4c4ced442811452e0a56800125db1620b2718c91 Mon Sep 17 00:00:00 2001
From: Aleks Kissinger <aleks0@gmail.com>
Date: Sun, 14 Jan 2018 19:01:59 +0100
Subject: add edge implementation 2/2

---
 src/gui/tikzscene.cpp    |  9 ++++++++-
 src/gui/undocommands.cpp | 24 ++++++++++++++++++++++++
 src/gui/undocommands.h   | 11 +++++++++++
 3 files changed, 43 insertions(+), 1 deletion(-)

(limited to 'src/gui')

diff --git a/src/gui/tikzscene.cpp b/src/gui/tikzscene.cpp
index 1d7ebd0..746e9dc 100644
--- a/src/gui/tikzscene.cpp
+++ b/src/gui/tikzscene.cpp
@@ -305,7 +305,7 @@ void TikzScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
         {
             int gridSize = GLOBAL_SCALE / 8;
             QPointF gridPos(round(mousePos.x()/gridSize)*gridSize, round(mousePos.y()/gridSize)*gridSize);
-            Node *n = new Node();
+            Node *n = new Node(_tikzDocument);
             n->setPoint(fromScreen(gridPos));
 
             QRectF grow(gridPos.x() - GLOBAL_SCALEF, gridPos.y() - GLOBAL_SCALEF, 2 * GLOBAL_SCALEF, 2 * GLOBAL_SCALEF);
@@ -318,6 +318,13 @@ void TikzScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
         }
         break;
     case ToolPalette::EDGE:
+        if (_edgeStartNodeItem != 0 && _edgeEndNodeItem != 0) {
+            Edge *e = new Edge(_edgeStartNodeItem->node(), _edgeEndNodeItem->node(), _tikzDocument);
+            AddEdgeCommand *cmd = new AddEdgeCommand(this, e);
+            _tikzDocument->undoStack()->push(cmd);
+        }
+        _edgeStartNodeItem = 0;
+        _edgeEndNodeItem = 0;
         _drawEdgeItem->setVisible(false);
         break;
     case ToolPalette::CROP:
diff --git a/src/gui/undocommands.cpp b/src/gui/undocommands.cpp
index 736c258..0fb235d 100644
--- a/src/gui/undocommands.cpp
+++ b/src/gui/undocommands.cpp
@@ -160,3 +160,27 @@ void AddNodeCommand::redo()
 
     _scene->setBounds(_newBounds);
 }
+
+AddEdgeCommand::AddEdgeCommand(TikzScene *scene, Edge *edge) :
+    _scene(scene), _edge(edge)
+{
+}
+
+void AddEdgeCommand::undo()
+{
+    EdgeItem *ei = _scene->edgeItems()[_edge];
+    _scene->removeItem(ei);
+    _scene->edgeItems().remove(_edge);
+    delete ei;
+
+    _scene->graph()->removeEdge(_edge);
+}
+
+void AddEdgeCommand::redo()
+{
+    // TODO: get the current style
+    _scene->graph()->addEdge(_edge);
+    EdgeItem *ei = new EdgeItem(_edge);
+    _scene->edgeItems().insert(_edge, ei);
+    _scene->addItem(ei);
+}
diff --git a/src/gui/undocommands.h b/src/gui/undocommands.h
index 0a7dece..9032274 100644
--- a/src/gui/undocommands.h
+++ b/src/gui/undocommands.h
@@ -79,4 +79,15 @@ private:
     QRectF _newBounds;
 };
 
+class AddEdgeCommand : public QUndoCommand
+{
+public:
+    explicit AddEdgeCommand(TikzScene *scene, Edge *edge);
+    void undo() override;
+    void redo() override;
+private:
+    TikzScene *_scene;
+    Edge *_edge;
+};
+
 #endif // UNDOCOMMANDS_H
-- 
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