nodes: added ability to label nodes

app/widget/nodeview/nodeview.cpp

@@ -20,6 +20,7 @@
 
 #include "nodeview.h"
 
+#include <QInputDialog>
 #include <QMouseEvent>
 
 #include "core.h"
@@ -208,7 +209,6 @@ void NodeView::Duplicate()
     Node* copy = n->copy();
 
     Node::CopyInputs(n, copy, false);
-    copy->SetPosition(n->GetPosition());
 
     duplicated_nodes.append(copy);
 
@@ -401,6 +401,15 @@ void NodeView::ShowContextMenu(const QPoint &pos)
   m.addSeparator();
 
   if (itemAt(pos)) {
+    QList<NodeViewItem*> selected = scene_.GetSelectedItems();
+
+    if (selected.size() == 1) {
+      QAction* label_action = m.addAction(tr("Label"));
+      connect(label_action, &QAction::triggered, this, &NodeView::ContextMenuLabelNode);
+
+      m.addSeparator();
+    }
+
     QAction* autopos = m.addAction(tr("Auto-Position"));
     connect(autopos, &QAction::triggered, this, &NodeView::AutoPositionDescendents);
   } else {
@@ -462,6 +471,30 @@ void NodeView::AutoPositionDescendents()
   }
 }
 
+void NodeView::ContextMenuLabelNode()
+{
+  QList<Node*> nodes = scene_.GetSelectedNodes();
+
+  if (nodes.isEmpty()) {
+    return;
+  }
+
+  Node* n = nodes.first();
+
+  bool ok;
+
+  QString s = QInputDialog::getText(this,
+                                    tr("Label Node"),
+                                    tr("Set node label"),
+                                    QLineEdit::Normal,
+                                    n->GetLabel(),
+                                    &ok);
+
+  if (ok) {
+    n->SetLabel(s);
+  }
+}
+
 void NodeView::PlaceNode(NodeViewItem *n, const QPointF &pos)
 {
   QRectF destination_rect = n->rect();

app/widget/nodeview/nodeview.h

@@ -141,6 +141,11 @@ private slots:
    */
   void AutoPositionDescendents();
 
+  /**
+   * @brief Receiver for labelling a node from the context menu
+   */
+  void ContextMenuLabelNode();
+
 };
 
 OLIVE_NAMESPACE_EXIT

app/widget/nodeview/nodeviewitem.cpp

@@ -135,6 +135,11 @@ int NodeViewItem::DefaultItemWidth()
   return QFontMetricsWidth(QFontMetrics(QFont()), "HHHHHHHHHH");;
 }
 
+int NodeViewItem::DefaultMaximumTextWidth()
+{
+  return QFontMetricsWidth(QFontMetrics(QFont()), "HHHHHHHH");;
+}
+
 int NodeViewItem::DefaultItemBorder()
 {
   return QFontMetrics(QFont()).height() / 12;
@@ -262,8 +267,36 @@ void NodeViewItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *opti
 
     painter->setPen(app_pal.color(QPalette::Text));
 
+    QString node_label;
+
+    if (node_->GetLabel().isEmpty()) {
+      node_label = node_->ShortName();
+    } else {
+      node_label = node_->GetLabel();
+    }
+
+    {
+      QFont f;
+      QFontMetrics fm(f);
+
+      int max_text_width = DefaultMaximumTextWidth();
+
+      if (QFontMetricsWidth(fm, node_label) > max_text_width) {
+        QString concatenated;
+
+        do {
+          node_label.chop(1);
+          concatenated = QCoreApplication::translate("NodeViewItem", "%1...").arg(node_label);
+        } while (QFontMetricsWidth(fm, concatenated) > max_text_width);
+
+        node_label = concatenated;
+      }
+    }
+
     // Draw the text in a rect (the rect is sized around text already in the constructor)
-    painter->drawText(title_bar_rect_, Qt::AlignCenter, node_->ShortName());
+    painter->drawText(title_bar_rect_,
+                      Qt::AlignCenter,
+                      node_label);
 
   }
 

app/widget/nodeview/nodeviewitem.h

@@ -86,6 +86,8 @@ public:
 
   static int DefaultItemWidth();
 
+  static int DefaultMaximumTextWidth();
+
   static int DefaultItemBorder();
 
   qreal DefaultItemHorizontalPadding() const;

app/widget/nodeview/nodeviewscene.cpp

@@ -180,10 +180,12 @@ void NodeViewScene::AddNode(Node* node)
   }
 
   connect(node, &Node::PositionChanged, this, &NodeViewScene::NodePositionChanged);
+  connect(node, &Node::LabelChanged, this, &NodeViewScene::NodeLabelChanged);
 }
 
 void NodeViewScene::RemoveNode(Node *node)
 {
+  disconnect(node, &Node::LabelChanged, this, &NodeViewScene::NodeLabelChanged);
   disconnect(node, &Node::PositionChanged, this, &NodeViewScene::NodePositionChanged);
 
   delete item_map_.take(node);
@@ -243,4 +245,9 @@ void NodeViewScene::NodePositionChanged(const QPointF &pos)
   item_map_.value(static_cast<Node*>(sender()))->SetNodePosition(pos);
 }
 
+void NodeViewScene::NodeLabelChanged()
+{
+  item_map_.value(static_cast<Node*>(sender()))->update();
+}
+
 OLIVE_NAMESPACE_EXIT

app/widget/nodeview/nodeviewscene.h

@@ -127,6 +127,10 @@ private slots:
    */
   void NodePositionChanged(const QPointF& pos);
 
+  /**
+   * @brief Receiver for when a node's label has changed
+   */
+  void NodeLabelChanged();
 
 };