Use configChanged() signal in TilingLayouts

Since there is a signal triggered if configurations are changed, the
reconfiguration method in TilingLayouts was made a slot and is connected
to the appropriate signal in Workspace.

tilinglayout.cpp

@@ -31,8 +31,10 @@ namespace KWin
 {
 
 TilingLayout::TilingLayout(Workspace *w)
-    : m_workspace(w)
+    : QObject()
+    , m_workspace(w)
 {
+    connect(m_workspace, SIGNAL(configChanged()), this, SLOT(reconfigureTiling()));
 }
 
 TilingLayout::~TilingLayout()

tilinglayout.h

@@ -33,8 +33,9 @@ class Workspace;
 class Client;
 class Tile;
 
-class TilingLayout
+class TilingLayout : public QObject
 {
+    Q_OBJECT
 public:
     TilingLayout(Workspace *w);
     virtual ~TilingLayout();
@@ -59,7 +60,6 @@ public:
     void removeTile(Client *c);
     void toggleFloatTile(Client *c);
     void swapTiles(Tile *a, Tile *b);
-    void reconfigureTiling();
 
     /**
      * All tiling layouts do not allow the user to manually
@@ -92,6 +92,9 @@ protected:
     virtual void postAddTile(Tile *t);
     virtual void preRemoveTile(Tile *t);
 
+protected Q_SLOTS:
+    void reconfigureTiling();
+
 private:
     int findTilePos(Client *c) const;
     virtual void arrange(QRect wgeom) = 0;

workspace.cpp

@@ -505,6 +505,7 @@ Workspace::~Workspace()
 {
     finishCompositing();
     blockStackingUpdates(true);
+    delete m_tiling;
 
     // TODO: grabXServer();
 
@@ -528,7 +529,6 @@ Workspace::~Workspace()
     delete desktop_change_osd;
 #endif
     delete m_outline;
-    delete m_tiling;
     discardPopup();
     XDeleteProperty(display(), rootWindow(), atoms->kwin_running);
 
@@ -1028,10 +1028,6 @@ void Workspace::slotReconfigure()
     }
 
     m_tiling->setTilingEnabled(options->tilingOn);
-    foreach (TilingLayout * layout, m_tiling->getTilingLayouts()) {
-        if (layout)
-            layout->reconfigureTiling();
-    }
     // just so that we reset windows in the right manner, 'activate' the current active window
     m_tiling->notifyTilingWindowActivated(activeClient());
     if (hasDecorationPlugin()) {