From f17f2a4f902fed525b6a47f4be68a2e10f51b227 Mon Sep 17 00:00:00 2001
From: Aleks Kissinger <aleks0@gmail.com>
Date: Fri, 10 Apr 2020 15:09:02 +0100
Subject: toggle show node labels from View menu (closes #62)

---
 src/gui/mainmenu.cpp  |  6 ++++++
 src/gui/mainmenu.h    |  1 +
 src/gui/mainmenu.ui   | 15 +++++++++++++++
 src/gui/nodeitem.cpp  |  8 +++++++-
 src/gui/tikzscene.cpp | 11 +++++++++++
 src/gui/tikzscene.h   |  4 ++++
 6 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/src/gui/mainmenu.cpp b/src/gui/mainmenu.cpp
index 35ab736..fe291a2 100644
--- a/src/gui/mainmenu.cpp
+++ b/src/gui/mainmenu.cpp
@@ -301,6 +301,12 @@ void MainMenu::on_actionZoom_Out_triggered()
     if (tikzit->activeWindow() != 0) tikzit->activeWindow()->tikzView()->zoomOut();
 }
 
+void MainMenu::on_actionShow_Node_Labels_triggered()
+{
+    tikzit->activeWindow()->tikzScene()->setDrawNodeLabels(ui.actionShow_Node_Labels->isChecked());
+    tikzit->activeWindow()->tikzScene()->invalidate();
+}
+
 void MainMenu::on_actionAbout_triggered()
 {
     QMessageBox::about(this,
diff --git a/src/gui/mainmenu.h b/src/gui/mainmenu.h
index 51d7d3c..220e3bd 100644
--- a/src/gui/mainmenu.h
+++ b/src/gui/mainmenu.h
@@ -78,6 +78,7 @@ public slots:
     // View
     void on_actionZoom_In_triggered();
     void on_actionZoom_Out_triggered();
+    void on_actionShow_Node_Labels_triggered();
 
     // Help
     void on_actionAbout_triggered();
diff --git a/src/gui/mainmenu.ui b/src/gui/mainmenu.ui
index 692f82e..eb3bed3 100644
--- a/src/gui/mainmenu.ui
+++ b/src/gui/mainmenu.ui
@@ -92,6 +92,7 @@
    </property>
    <addaction name="actionZoom_In"/>
    <addaction name="actionZoom_Out"/>
+   <addaction name="actionShow_Node_Labels"/>
   </widget>
   <widget class="QMenu" name="menuHelp">
    <property name="title">
@@ -383,6 +384,20 @@
     <string>Ctrl+M</string>
    </property>
   </action>
+  <action name="actionShow_Node_Labels">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="checked">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Show Node Labels</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+Shift+L</string>
+   </property>
+  </action>
   <addaction name="menuFile"/>
   <addaction name="menuEdit"/>
   <addaction name="menuView"/>
diff --git a/src/gui/nodeitem.cpp b/src/gui/nodeitem.cpp
index 82692f2..7ae4c4a 100644
--- a/src/gui/nodeitem.cpp
+++ b/src/gui/nodeitem.cpp
@@ -91,7 +91,13 @@ void NodeItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidge
         painter->drawPath(shape());
     }
 
-    if (_node->label() != "") {
+    bool drawLabel = _node->label() != "";
+    if (scene()) {
+        TikzScene *sc = static_cast<TikzScene*>(scene());
+        drawLabel= drawLabel && sc->drawNodeLabels();
+    }
+
+    if (drawLabel) {
         QRectF rect = labelRect();
         QPen pen(QColor(200,0,0,120));
         QVector<qreal> d;
diff --git a/src/gui/tikzscene.cpp b/src/gui/tikzscene.cpp
index 4577981..969a355 100644
--- a/src/gui/tikzscene.cpp
+++ b/src/gui/tikzscene.cpp
@@ -38,6 +38,7 @@ TikzScene::TikzScene(TikzDocument *tikzDocument, ToolPalette *tools,
 {
     _modifyEdgeItem = nullptr;
     _edgeStartNodeItem = nullptr;
+    _drawNodeLabels = true;
     _drawEdgeItem = new QGraphicsLineItem();
     _rubberBandItem = new QGraphicsRectItem();
     _enabled = true;
@@ -907,6 +908,16 @@ void TikzScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
     }
 }
 
+bool TikzScene::drawNodeLabels() const
+{
+    return _drawNodeLabels;
+}
+
+void TikzScene::setDrawNodeLabels(bool drawNodeLabels)
+{
+    _drawNodeLabels = drawNodeLabels;
+}
+
 bool TikzScene::highlightTails() const
 {
     return _highlightTails && getSelectedNodes().isEmpty();
diff --git a/src/gui/tikzscene.h b/src/gui/tikzscene.h
index f8dc7ec..1edd50a 100644
--- a/src/gui/tikzscene.h
+++ b/src/gui/tikzscene.h
@@ -90,6 +90,9 @@ public:
     bool highlightHeads() const;
     bool highlightTails() const;
 
+    bool drawNodeLabels() const;
+    void setDrawNodeLabels(bool drawNodeLabels);
+
 public slots:
     void graphReplaced();
     void refreshZIndices();
@@ -115,6 +118,7 @@ private:
     bool _firstControlPoint;
     QPointF _mouseDownPos;
     bool _draggingNodes;
+    bool _drawNodeLabels;
 
     QMap<Node*,QPointF> _oldNodePositions;
     qreal _oldWeight;
-- 
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