Make triggers work

src/cell.cpp

@@ -134,10 +134,10 @@ bool TeleportCell::onMovingTo(HeroPtr &hero, LevelPtr &level)
 
 ///////////////////////////////////////
 
-TriggerCell::TriggerCell(coordinate cell_x, coordinate cell_y, const std::vector<CellPtr> &cells_to_change, const sf::Color &color) :
+TriggerCell::TriggerCell(std::vector<CellPtr> &&cells_to_change, coordinate cell_x, coordinate cell_y, const sf::Color &color) :
     Cell(cell_x, cell_y, color)
 {
-	cells.assign(std::move(cells_to_change));
+    cells = std::move(cells_to_change);
 }
 
 TriggerCell::~TriggerCell()
@@ -150,11 +150,14 @@ bool TriggerCell::onMovingTo(HeroPtr &hero, LevelPtr &level)
 	Map &map = level->mapArray();
 
 	// We replace needed cells with the ones that the trigger provides.
-    for (const &cell : cells)
-		map[cell->x()][cell->y()].reset(cell.release());
-	
-	// Trigger works only once.
-	cells.clear();
+    for (CellPtr &cell : cells)
+    {
+        const coordinate &y = cell->y();
+        const coordinate &x = cell->x();
+
+        map[x][y].release();
+        map[x][y] = std::move(cell);
+    }
 	
 	// It's an impassable object, so player can't move to here.
     return false;

src/cell.h

@@ -1,12 +1,16 @@
 #ifndef CELL_H
 #define CELL_H
 
-#include "entity.h"
 #include <memory>
+#include <vector>
+
 #include <SFML/Graphics/Color.hpp>
 
+#include "entity.h"
+
 class Hero;
 class Level;
+class Cell;
 
 using HeroPtr   = std::unique_ptr<Hero>;
 using LevelPtr  = std::unique_ptr<Level>;
@@ -142,9 +146,9 @@ private:
 	std::vector<CellPtr> cells;
 
 public:
-    TriggerCell(coordinate cell_x = 0,
-                coordinate cell_y = 0,
-                const std::vector<CellPtr> &cells_to_change = std::vector<CellPtr>(),  // Pink
+    TriggerCell(std::vector<CellPtr> &&cells_to_change,
+                coordinate cell_x = 0,
+                coordinate cell_y = 0,  // Pink
                 const sf::Color &color = sf::Color(255, 192, 203));
 
     virtual ~TriggerCell() override;

src/game.cpp

@@ -171,6 +171,12 @@ void Game::loadLevel(int level_index)
         for (coordinate y = 0; y < side; ++y)
             map[x][y] = std::make_unique<WaterCell>(x, y);
 
+    std::vector<CellPtr> trigger_cells;
+
+    trigger_cells.emplace_back(std::make_unique<PassableCell>(0, 0));
+    trigger_cells.emplace_back(std::make_unique<PassableCell>(1, 0));
+    trigger_cells.emplace_back(std::make_unique<PassableCell>(0, 1));
+
     switch (level_index)
     {
     case 1:
@@ -197,6 +203,7 @@ void Game::loadLevel(int level_index)
         map[9][6] = std::make_unique<PassableCell>(9, 6);
         map[8][7] = std::make_unique<ExitCell>(8, 7);
         map[2][3] = std::make_unique<ChargeCell>(2, 3, 5);
+        map[3][3] = std::make_unique<TriggerCell>(std::move(trigger_cells), 3, 3);
         break;
     default:
         main_window.close();

src/level.h

@@ -1,12 +1,12 @@
 #ifndef LEVEL_H
 #define LEVEL_H
 
-#include "cell.h"
 #include <array>
+#include "cell.h"
 
 constexpr coordinate side = 32;
 
-using Row = std::array<std::unique_ptr<Cell>, side>;
+using Row = std::array<CellPtr, side>;
 using Map = std::array<Row, side>;
 
 /// Abstraction over 2D array to quickly get access to level cells