From 971b4523cceaf7b4972301cea203375137790986 Mon Sep 17 00:00:00 2001
From: Steffen Ritter
Date: Wed, 10 Jul 2019 10:38:55 +0200
Subject: Handle special keys

---
 src/mainwindow.cpp | 17 +++++++++++++++++
 src/mainwindow.h   |  4 +++-
 src/snake.cpp      | 19 ++++++++++++++++---
 src/snake.h        |  6 +++++-
 4 files changed, 41 insertions(+), 5 deletions(-)

diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 5bc38b9..1e08f0f 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -151,6 +151,23 @@ void MainWindow::mouseDoubleClickEvent(QMouseEvent *)
     }
 }
 
+void MainWindow::keyPressEvent(QKeyEvent *event)
+{
+  switch (event->key()) {
+    case Qt::Key_Escape:
+      if (m_Snake != nullptr) {
+        delete m_Snake;
+        m_Snake = nullptr;
+      }
+      break;
+    case Qt::Key_Pause:
+      if (m_Snake != nullptr) {
+        m_Snake->pauseAndResume();
+      }
+      break;
+  }
+}
+
 QSize MainWindow::createLogo(QRect max)
 {
     QSize retval(0, 0);
diff --git a/src/mainwindow.h b/src/mainwindow.h
index ec153b7..8f9245e 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -58,8 +58,10 @@ protected:
 
     virtual void mouseDoubleClickEvent(QMouseEvent *);
 
+    virtual void keyPressEvent(QKeyEvent *);
+
 public slots:
-	void showStandby();
+    void showStandby();
     void updateClock();
 
 private:
diff --git a/src/snake.cpp b/src/snake.cpp
index 5246a3c..9c7fefa 100644
--- a/src/snake.cpp
+++ b/src/snake.cpp
@@ -126,10 +126,10 @@ GameCore::GameCore(QWidget *widget)
     }
     qDebug() << "Field:" << _width << _height;
     addFood();
-    QTimer *t = new QTimer(widget);
-    t->start(15);
+    _t = new QTimer(widget);
+    _t->start(15);
     // GAME
-    QTimer::connect(t, &QTimer::timeout, [this]() {
+    QTimer::connect(_t, &QTimer::timeout, [this]() {
         //
         static int tick = 0;
         ++tick;
@@ -392,6 +392,10 @@ GameCore::GameCore(QWidget *widget)
 GameCore::~GameCore()
 {
     free(_field);
+    if(_t->isActive()) {
+      _t->stop();
+    }
+    _widget->update();
 }
 
 void GameCore::scanDir(Snake *snake, int dx, int dy, const Cell* &what, int &dist)
@@ -453,6 +457,15 @@ void GameCore::initField()
     _widget->update();
 }
 
+void GameCore::pauseAndResume()
+{
+    if(_t->isActive()) {
+      _t->stop();
+    } else {
+      _t->start();
+    }
+}
+
 void GameCore::addFood()
 {
     for (int i = 0; i < 10; ++i) {
diff --git a/src/snake.h b/src/snake.h
index dfa58cc..3adc301 100644
--- a/src/snake.h
+++ b/src/snake.h
@@ -3,6 +3,7 @@
 
 #include <QList>
 #include <QPoint>
+#include <QTimer>
 
 class QWidget;
 class QPaintEvent;
@@ -16,7 +17,8 @@ struct Paddle;
 class GameCore
 {
 private:
-	QWidget *_widget;
+    QWidget *_widget;
+    QTimer *_t;
     int _width, _height;
     QList<Snake*> _snakes;
     QList<Ball*> _balls;
@@ -44,6 +46,8 @@ public:
     void addSnake();
 
     void initField();
+
+    void pauseAndResume();
 };
 
 #endif
-- 
cgit v1.2.3-55-g7522