From 3cdc77bc7d1da312a0c7ae9c734f6a33f1c49ecf Mon Sep 17 00:00:00 2001
From: totycro <totycro@unknown-horizons.org>
Date: Tue, 5 Apr 2011 18:19:03 +0200
Subject: added key handling

---
 pacman-c++/mainwidget.cpp | 40 ++++++++++++++++++++++++++++++++++++++++
 pacman-c++/mainwidget.h   | 14 ++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/pacman-c++/mainwidget.cpp b/pacman-c++/mainwidget.cpp
index 9d7fb14..743b57e 100644
--- a/pacman-c++/mainwidget.cpp
+++ b/pacman-c++/mainwidget.cpp
@@ -6,7 +6,10 @@
 #include "constants.h"
 
 MainWidget::MainWidget()
+  : currentKey(0)
 {
+  setFocusPolicy(Qt::StrongFocus);
+  
   QVBoxLayout *layout = new QVBoxLayout(this);
 
   QHBoxLayout *m_scoreLayout = new QHBoxLayout();
@@ -172,3 +175,40 @@ QPoint MainWidget::mapPositionToCoord(unsigned int x, unsigned int y)
   return QPoint(x * field_size[0], y * field_size[1]);
 }
 
+transmission::field_t MainWidget::translateKey(int key)
+{
+  switch(key) {
+    case Qt::Key_Up:
+      return transmission::direction_up;
+      break;
+    case Qt::Key_Down:
+      return transmission::direction_down;
+      break;
+    case Qt::Key_Left:
+      return transmission::direction_left;
+      break;
+    case Qt::Key_Right:
+      return transmission::direction_right;
+      break;
+    default:
+      return 0;
+  }
+}
+
+void MainWidget::keyPressEvent(QKeyEvent* event)
+{
+  QWidget::keyPressEvent(event);
+  currentKey = translateKey( event->key() );
+}
+
+void MainWidget::keyReleaseEvent(QKeyEvent* event)
+{
+  QWidget::keyReleaseEvent(event);
+  transmission::field_t releasedKey = translateKey(event->key());
+  if (releasedKey == currentKey) {
+    // current key got released
+    // if this is false, a key got released which has already
+    // been replaced by a different key, so this case is disregarded
+    currentKey = 0; 
+  }
+}
diff --git a/pacman-c++/mainwidget.h b/pacman-c++/mainwidget.h
index dc20d75..f7113a5 100644
--- a/pacman-c++/mainwidget.h
+++ b/pacman-c++/mainwidget.h
@@ -3,6 +3,7 @@
 
 #include "constants.h"
 #include <QtGui>
+#include <QtCore>
 
 class Actor;
 
@@ -14,6 +15,11 @@ class MainWidget
 public:
   MainWidget();
 
+protected:
+  // handling of current key
+  virtual void keyPressEvent(QKeyEvent* );
+  virtual void keyReleaseEvent(QKeyEvent* );
+
 private:
   void loadDummyMap();
 
@@ -22,10 +28,18 @@ private:
   // data conversion
   QPoint mapPositionToCoord(unsigned int x, unsigned int y);
 
+  // GUI elements needed in the progress of the game
   QList<QGridLayout*> m_playerScoreLayouts;
   QGraphicsScene *m_scene;
 
+  // map of actors in order to keep track of those instances
   QMap<Color, Actor*> m_actors;
+
+  // key currently pressed by user
+  transmission::field_t currentKey;
+
+  // translate Qt::Key to our key format
+  transmission::field_t translateKey(int);
 };
 
 #endif // MAINWIDGET_H
-- 
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