d for delete

graph_browser.cpp

@@ -50,7 +50,7 @@ void GraphBrowser::destroy()
   endwin();
 }
 
-GraphBrowser::GraphBrowser(const Graph<std::string>& g)
+GraphBrowser::GraphBrowser(Graph<std::string>& g)
   : menu_(0)
   , current_win_(0)
   , n_win(0)
@@ -92,7 +92,7 @@ GraphBrowser::GraphBrowser(const Graph<std::string>& g)
   wrefresh(n_of_n_win_);
 
   // bottom text
-  mvprintw(TERM_MAX_Y-1, 0, "ESC to exit, cursor keys to navigate");
+  mvprintw(TERM_MAX_Y-1, 0, "ESC to exit, cursor keys to navigate, d to delete");
   refresh();
 }
 
@@ -144,7 +144,21 @@ void GraphBrowser::mainLoop()
         menu_driver(menu_, REQ_SCR_UPAGE);
         break;
 
+      case KEY_DEL: {
+        const std::string current = history_.back();
+        if (current == history_.front()) // cannot delete the first
+          break;
+
+        graph_.removeVertex(current);
+
+        history_.pop_back();
+        const std::string prev = history_.back();
+        updateCurrent(prev);
+        updateNeighbours();
+
       }
+    }
+
     wrefresh(current_win_);
   }
 }

graph_browser.hpp

@@ -13,7 +13,10 @@ public:
 
   static constexpr size_t TERM_MAX_X = 80;
   static constexpr size_t TERM_MAX_Y = 24;
+
   static constexpr int KEY_ESC = 27;
+  static constexpr int KEY_DEL = 100;  // d
+
   static constexpr size_t window_height = TERM_MAX_Y-2;
   static constexpr size_t current_window_width = TERM_MAX_X/4;
   static constexpr size_t n_window_width = TERM_MAX_X/4;
@@ -21,7 +24,7 @@ public:
   void static init();
   void static destroy();
 
-  GraphBrowser(const Graph<std::string>& g);
+  GraphBrowser(Graph<std::string>& g);
   ~GraphBrowser();
 
   void mainLoop();
@@ -36,7 +39,7 @@ private:
   MENU *menu_;
   WINDOW *current_win_, *n_win, * n_of_n_win_;
   ITEM **items_;
-  const Graph<std::string>& graph_;
+  Graph<std::string>& graph_;
 
   std::deque<std::string> history_;
 };

main.cpp

@@ -52,7 +52,7 @@ Graph<std::string> generateRandomGraph(size_t number_of_vertices,
 
 int main(int argc, char* argv[])
 {
-  const Graph<std::string> g = generateRandomGraph(10, 200, 5, 20);
+  Graph<std::string> g = generateRandomGraph(10, 200, 5, 20);
 
   GraphBrowser::init();