Add pause function to game

include/game_view/GameField.h

@@ -130,11 +130,17 @@ class GameField: public QGraphicsScene{
     void setFps(qreal fps);
 
     /**
-     * Start the game
-     * Should be called explicitly
+     * Start the game.
+     * Should be called explicitly.
      */
     void startGame();
 
+    /**
+     * Pause the game.
+     * Should be called explicitly.
+     */
+     void pauseGame();
+
 private:
 
     /**
@@ -221,11 +227,6 @@ class GameField: public QGraphicsScene{
      */
     static bool pointFloatEqual(const QPointF& p1, const QPointF& p2);
 
-    /**
-     * Return distance between p1 and p2
-     */
-    static qreal distanceBetween(const QPointF& p1, const QPointF& p2);
-
     /**
      * Check if any monster has reached the Protection Objective.
      * If so, remove it from the field and minus life_points_ by 1.

include/game_view/MainWindow.h

@@ -27,6 +27,8 @@ private slots:
 
     void resetGame();
 
+    void pauseOrResumeGame(bool is_pause);
+
     void loadLevel();
 };
 

source/game_view/GameField.cpp

@@ -368,15 +368,15 @@ bool GameField::pointFloatEqual(const QPointF& p1, const QPointF& p2){
     return qRealEqual(p1.x(), p2.x()) && qRealEqual(p1.y(), p2.y());
 }
 
-qreal GameField::distanceBetween(const QPointF &p1, const QPointF &p2) {
-    return qSqrt(qPow(p1.x() - p2.x(), 2) + qPow(p1.y() - p2.y(), 2));
-}
-
 
 void GameField::startGame() {
     timer_.start();
 }
 
+void GameField::pauseGame() {
+    timer_.stop();
+}
+
 void GameField::checkReachProtectionObjective() {
     auto it = monsters_.begin();
     while(it != monsters_.end()){

source/game_view/MainWindow.cpp

@@ -23,6 +23,9 @@ MainWindow::MainWindow(QWidget *parent): QMainWindow(parent) {
     connect(reset_game_act, &QAction::triggered, this, &MainWindow::resetGame);
     auto* load_level_act = new QAction(QIcon(":/icons/plus.svg"), "New Level");
     connect(reset_game_act, &QAction::triggered, this, &MainWindow::loadLevel);
+    auto* pause_game_act = new QAction(QIcon(":/icons/pause.svg"), "Pause");
+    pause_game_act->setCheckable(true);
+    connect(pause_game_act, &QAction::toggled, this, &MainWindow::pauseOrResumeGame);
 
     // Set MenuBar
     auto* menu_bar = menuBar();
@@ -37,6 +40,8 @@ MainWindow::MainWindow(QWidget *parent): QMainWindow(parent) {
     addToolBar(tool_bar);
     tool_bar->addAction(reset_game_act);
     tool_bar->addAction(load_level_act);
+    tool_bar->addSeparator();
+    tool_bar->addAction(pause_game_act);
 
 }
 
@@ -53,6 +58,20 @@ void MainWindow::resetGame() {
     startGame();
 }
 
+void MainWindow::pauseOrResumeGame(bool is_pause) {
+    auto* pause_action = qobject_cast<QAction*>(sender());
+    if(is_pause){
+        game_field_->pauseGame();
+        pause_action->setIcon(QIcon(":/icons/play.svg"));
+        pause_action->setText("Resume");
+    }
+    else{
+        game_field_->startGame();
+        pause_action->setIcon(QIcon(":/icons/pause.svg"));
+        pause_action->setText("Pause");
+    }
+}
+
 void MainWindow::loadLevel() {
     // TODO: To be implemented
 }