From 9e2116497660509afd417cc3b952ea80bbb72ce5 Mon Sep 17 00:00:00 2001
From: Aleks Kissinger <aleks0@gmail.com>
Date: Thu, 5 Apr 2018 15:07:57 +0200
Subject: can now edit node labels

---
 src/data/edge.cpp        |  2 ++
 src/gui/tikzscene.cpp    | 15 +++++++++++++++
 src/gui/tikzview.cpp     |  2 +-
 src/gui/undocommands.cpp | 23 +++++++++++++++++++++++
 src/gui/undocommands.h   | 16 ++++++++++++++++
 5 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/src/data/edge.cpp b/src/data/edge.cpp
index bcf127f..5c49aba 100644
--- a/src/data/edge.cpp
+++ b/src/data/edge.cpp
@@ -248,6 +248,8 @@ void Edge::updateData()
     if (_source == _target) _data->setAtom("loop");
     if (!isSelfLoop() && !isStraight() && _weight != 0.4f)
         _data->setProperty("looseness", QString::number(_weight*2.5f, 'f', 2));
+    if (_source->style()->isNone()) _sourceAnchor = "center";
+    if (_target->style()->isNone()) _targetAnchor = "center";
 
 }
 
diff --git a/src/gui/tikzscene.cpp b/src/gui/tikzscene.cpp
index 8378f5e..ffc111c 100644
--- a/src/gui/tikzscene.cpp
+++ b/src/gui/tikzscene.cpp
@@ -8,6 +8,7 @@
 #include <QBrush>
 #include <QDebug>
 #include <QClipboard>
+#include <QInputDialog>
 #include <cmath>
 
 
@@ -444,6 +445,20 @@ void TikzScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
             _tikzDocument->undoStack()->push(cmd);
             break;
         }
+
+        if (NodeItem *ni = dynamic_cast<NodeItem*>(gi)) {
+            bool ok;
+            QString newLabel = QInputDialog::getText(views()[0], tr("Node label"),
+                                                     tr("Label:"), QLineEdit::Normal,
+                                                     ni->node()->label(), &ok);
+            if (ok && !newLabel.isEmpty()) {
+                QMap<Node*,QString> oldLabels;
+                oldLabels.insert(ni->node(), ni->node()->label());
+                ChangeLabelCommand *cmd = new ChangeLabelCommand(this, graph(), oldLabels, newLabel);
+                _tikzDocument->undoStack()->push(cmd);
+            }
+            break;
+        }
     }
 }
 
diff --git a/src/gui/tikzview.cpp b/src/gui/tikzview.cpp
index 60dc2bc..60db665 100644
--- a/src/gui/tikzview.cpp
+++ b/src/gui/tikzview.cpp
@@ -6,7 +6,7 @@
 
 TikzView::TikzView(QWidget *parent) : QGraphicsView(parent)
 {
-    setRenderHint(QPainter::Antialiasing);
+    //setRenderHint(QPainter::Antialiasing);
     //setDragMode(QGraphicsView::RubberBandDrag);
 
     _scale = 1.0f;
diff --git a/src/gui/undocommands.cpp b/src/gui/undocommands.cpp
index f64b1db..32fafbe 100644
--- a/src/gui/undocommands.cpp
+++ b/src/gui/undocommands.cpp
@@ -328,3 +328,26 @@ void PasteCommand::redo()
 
     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]);
+    }
+
+    GraphUpdateCommand::undo();
+}
+
+void ChangeLabelCommand::redo()
+{
+    foreach (Node *n, _oldLabels.keys()) {
+        n->setLabel(_newLabel);
+    }
+
+    GraphUpdateCommand::redo();
+}
diff --git a/src/gui/undocommands.h b/src/gui/undocommands.h
index 354e455..e716458 100644
--- a/src/gui/undocommands.h
+++ b/src/gui/undocommands.h
@@ -130,4 +130,20 @@ private:
     QList<QGraphicsItem*> _oldSelection;
 };
 
+class ChangeLabelCommand : public GraphUpdateCommand
+{
+public:
+    explicit ChangeLabelCommand(TikzScene *scene,
+                                Graph *graph,
+                                QMap<Node*,QString> oldLabels,
+                                QString newLabel,
+                                QUndoCommand *parent = 0);
+    void undo() override;
+    void redo() override;
+private:
+    Graph *_graph;
+    QMap<Node*,QString> _oldLabels;
+    QString _newLabel;
+};
+
 #endif // UNDOCOMMANDS_H
-- 
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