Add saveable labels for parts and connectors

Label.h

@@ -1,11 +1,30 @@
 #ifndef LABEL_H
 #define LABEL_H
 
+#include <QGraphicsTextItem>
+#include <QPointF>
 
-class Label : public QGraphicsTextItem
+#include "eAlignMode.h"
+
+class Label : private QGraphicsTextItem
 {
 public:
-    Label();
+    Label(QGraphicsItem* parent);
+
+    void setEditable(bool value);
+    void setText(const QString& text);
+    QString text() const;
+    void alignText(QPointF anchorPos, AlignMode::AlignMode mode = AlignMode::Default);
+
+private:
+    QGraphicsItem* m_parentItem;
+
+    QPointF m_textAnchor;
+    AlignMode::AlignMode m_alignMode;
+
+    void keyPressEvent(QKeyEvent* event) override;
+
+    void recalculateTextAlignment();
 };
 
 #endif // LABEL_H