node_editor.h: set up edgeList, emplace some test data

src/gui/node_editor.h

@@ -64,8 +64,10 @@ public:
 class NodeEditor {
 public:
     NodeEditor() {
-        nodeList.emplace_back("hi", Rect(10, 10, 60, 60));
-        nodeList.emplace_back("hi2", Rect(10, 80, 60, 60));
+        nodeList.emplace_back("hi", Rect(10, 10, 60, 60), 3, 1);
+        nodeList.emplace_back("hi2", Rect(80, 10, 60, 60), 1, 1);
+
+        edgeList.emplace_back(&nodeList[0], &nodeList[1], 0, 0);
     }
 
     void draw_window(const char *title, bool *opened) {
@@ -144,6 +146,7 @@ public:
 
 private:
     std::vector<GuiNode> nodeList;
+    std::vector<GuiEdge> edgeList;
 
     ImVec2 scrolling = ImVec2(0.0f, 0.0f);
     bool show_grid = true;