save new node contexts to project file

app/node/graph.h

@@ -98,6 +98,11 @@ public:
     return position_map_[context];
   }
 
+  const QMap<Node *, PositionMap> &GetPositionMap() const
+  {
+    return position_map_;
+  }
+
 signals:
   /**
    * @brief Signal emitted when a Node is added to the graph

app/node/project/project.cpp

@@ -136,6 +136,71 @@ void Project::Load(QXmlStreamReader *reader, MainWindowLayoutInfo* layout, uint
         }
       }
 
+    } else if (reader->name() == QStringLiteral("positions")) {
+
+      while (XMLReadNextStartElement(reader)) {
+
+        if (reader->name() == QStringLiteral("context")) {
+
+          quintptr context_ptr = 0;
+          XMLAttributeLoop(reader, attr) {
+            if (attr.name() == QStringLiteral("ptr")) {
+              context_ptr = attr.value().toULongLong();
+              break;
+            }
+          }
+
+          Node *context = xml_node_data.node_ptrs.value(context_ptr);
+
+          if (!context) {
+            qWarning() << "Failed to find pointer for context";
+            reader->skipCurrentElement();
+          } else {
+            while (XMLReadNextStartElement(reader)) {
+              if (reader->name() == QStringLiteral("node")) {
+                quintptr node_ptr = 0;
+                XMLAttributeLoop(reader, attr) {
+                  if (attr.name() == QStringLiteral("ptr")) {
+                    node_ptr = attr.value().toULongLong();
+                    break;
+                  }
+                }
+
+                Node *node = xml_node_data.node_ptrs.value(node_ptr);
+
+                if (!node) {
+                  qWarning() << "Failed to find pointer for node position";
+                  reader->skipCurrentElement();
+                } else {
+                  QPointF pos;
+
+                  while (XMLReadNextStartElement(reader)) {
+                    if (reader->name() == QStringLiteral("x")) {
+                      pos.setX(reader->readElementText().toDouble());
+                    } else if (reader->name() == QStringLiteral("y")) {
+                      pos.setY(reader->readElementText().toDouble());
+                    } else {
+                      reader->skipCurrentElement();
+                    }
+                  }
+
+                  SetNodePosition(node, context, pos);
+                }
+
+              } else {
+                reader->skipCurrentElement();
+              }
+            }
+          }
+
+        } else {
+
+          reader->skipCurrentElement();
+
+        }
+
+      }
+
     } else {
 
       // Skip this
@@ -177,6 +242,32 @@ void Project::Save(QXmlStreamWriter *writer) const
 
   writer->writeEndElement(); // nodes
 
+  writer->writeStartElement(QStringLiteral("positions"));
+
+  for (auto it=GetPositionMap().cbegin(); it!=GetPositionMap().cend(); it++) {
+    writer->writeStartElement(QStringLiteral("context"));
+
+    writer->writeAttribute(QStringLiteral("ptr"), QString::number(reinterpret_cast<quintptr>(it.key())));
+
+    const PositionMap &map = it.value();
+
+    for (auto jt=map.cbegin(); jt!=map.cend(); jt++) {
+      writer->writeStartElement(QStringLiteral("node"));
+
+      writer->writeAttribute(QStringLiteral("ptr"), QString::number(reinterpret_cast<quintptr>(jt.key())));
+
+      const QPointF &pos = jt.value();
+      writer->writeTextElement(QStringLiteral("x"), QString::number(pos.x()));
+      writer->writeTextElement(QStringLiteral("y"), QString::number(pos.y()));
+
+      writer->writeEndElement(); // node
+    }
+
+    writer->writeEndElement(); // context
+  }
+
+  writer->writeEndElement(); // positions
+
   // Save main window project layout
   MainWindowLayoutInfo main_window_info = Core::instance()->main_window()->SaveLayout();
   main_window_info.toXml(writer);