ui: graph view edges

Added simple edges to the graph view. Also fixed a memory leak source in QtMainWindow.

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src/lib/component/view/graphElements/GraphEdge.cpp

@@ -0,0 +1,9 @@
+#include "component/view/graphElements/GraphEdge.h"
+
+GraphEdge::GraphEdge()
+{
+}
+
+GraphEdge::~GraphEdge()
+{
+}

src/lib/component/view/graphElements/GraphEdge.h

@@ -0,0 +1,14 @@
+#ifndef GRAPH_EDGE_H
+#define GRAPH_EDGE_H
+
+class GraphEdge
+{
+public:
+	GraphEdge();
+	virtual ~GraphEdge();
+
+	virtual void ownerMoved() = 0;
+	virtual void targetMoved() = 0;
+};
+
+#endif // GRAPH_EDGE_H

src/lib/component/view/graphElements/GraphNode.h

@@ -1,11 +1,22 @@
 #ifndef GRAPH_NODE_H
 #define GRAPH_NODE_H
 
+#include "utility/math/Vector2.h"
+
+class GraphEdge;
+
 class GraphNode
 {
 public:
 	GraphNode();
 	virtual ~GraphNode();
+
+	virtual Vec2i getPosition() = 0;
+
+	virtual void addOutEdge(const std::shared_ptr<GraphEdge>& edge) = 0;
+	virtual void addInEdge(const std::weak_ptr<GraphEdge>& edge) = 0;
+
+	virtual void removeOutEdge(const std::shared_ptr<GraphEdge>& edge) = 0;
 };
 
 #endif // GRAPH_NODE_H