diff --git a/kdirstat/kdirstatapp.cpp b/kdirstat/kdirstatapp.cpp
index eb24b33..8a050c0 100644
--- a/kdirstat/kdirstatapp.cpp
+++ b/kdirstat/kdirstatapp.cpp
@@ -99,13 +99,13 @@ KDirStatApp::KDirStatApp( TQWidget* , const char* name )
     connect( this,	TQT_SIGNAL( readConfig() 		), _treeView,	TQT_SLOT  ( readConfig() ) );
     connect( this,	TQT_SIGNAL( saveConfig() 		), _treeView,	TQT_SLOT  ( saveConfig() ) );
 
-    connect( _treeView, TQT_SIGNAL( finished()		), TQT_TQOBJECT(this), TQT_SLOT( createTreemapView() ) );
-    connect( _treeView, TQT_SIGNAL( aborted()		), TQT_TQOBJECT(this), TQT_SLOT( createTreemapView() ) );
-    connect( _treeView, TQT_SIGNAL( startingReading()	), TQT_TQOBJECT(this), TQT_SLOT( deleteTreemapView() ) );
+    connect( _treeView, TQT_SIGNAL( finished()		), this, TQT_SLOT( createTreemapView() ) );
+    connect( _treeView, TQT_SIGNAL( aborted()		), this, TQT_SLOT( createTreemapView() ) );
+    connect( _treeView, TQT_SIGNAL( startingReading()	), this, TQT_SLOT( deleteTreemapView() ) );
 
-    connect( _treeView, TQT_SIGNAL( startingReading()	), TQT_TQOBJECT(this), TQT_SLOT( updateActions() ) );
-    connect( _treeView, TQT_SIGNAL( finished()        	), TQT_TQOBJECT(this), TQT_SLOT( updateActions() ) );
-    connect( _treeView, TQT_SIGNAL( aborted()         	), TQT_TQOBJECT(this), TQT_SLOT( updateActions() ) );
+    connect( _treeView, TQT_SIGNAL( startingReading()	), this, TQT_SLOT( updateActions() ) );
+    connect( _treeView, TQT_SIGNAL( finished()        	), this, TQT_SLOT( updateActions() ) );
+    connect( _treeView, TQT_SIGNAL( aborted()         	), this, TQT_SLOT( updateActions() ) );
 
     // Call inits to invoke all other construction parts
 
@@ -141,72 +141,72 @@ KDirStatApp::~KDirStatApp()
 void
 KDirStatApp::initActions()
 {
-    _fileAskOpenDir	= KStdAction::open		( TQT_TQOBJECT(this), TQT_SLOT( fileAskOpenDir() ), 		actionCollection() );
+    _fileAskOpenDir	= KStdAction::open		( this, TQT_SLOT( fileAskOpenDir() ), 		actionCollection() );
 
     _fileAskOpenUrl	= new TDEAction( i18n( "Open &URL..." ), "konqueror", 0,
-				       TQT_TQOBJECT(this), TQT_SLOT( fileAskOpenUrl() ),
+				       this, TQT_SLOT( fileAskOpenUrl() ),
 				       actionCollection(), "file_open_url" );
 
-    _fileOpenRecent	= KStdAction::openRecent	( TQT_TQOBJECT(this), TQT_SLOT( fileOpenRecent( const KURL& ) ),	actionCollection() );
-    _fileCloseDir	= KStdAction::close		( TQT_TQOBJECT(this), TQT_SLOT( fileCloseDir() ), 		actionCollection() );
+    _fileOpenRecent	= KStdAction::openRecent	( this, TQT_SLOT( fileOpenRecent( const KURL& ) ),	actionCollection() );
+    _fileCloseDir	= KStdAction::close		( this, TQT_SLOT( fileCloseDir() ), 		actionCollection() );
 
     _fileRefreshAll		= new TDEAction( i18n( "Refresh &All" ), "reload", 0,
-					       TQT_TQOBJECT(this), TQT_SLOT( refreshAll() ),
+					       this, TQT_SLOT( refreshAll() ),
 					       actionCollection(), "file_refresh_all" );
 
     _fileRefreshSelected	= new TDEAction( i18n( "Refresh &Selected" ), 0,
-					       TQT_TQOBJECT(this), TQT_SLOT( refreshSelected() ),
+					       this, TQT_SLOT( refreshSelected() ),
 					       actionCollection(), "file_refresh_selected" );
 
     _fileContinueReadingAtMountPoint = new TDEAction( i18n( "Continue Reading at &Mount Point" ), "drive-harddisk-mounted", 0,
-						    TQT_TQOBJECT(this), TQT_SLOT( refreshSelected() ), actionCollection(),
+						    this, TQT_SLOT( refreshSelected() ), actionCollection(),
 						    "file_continue_reading_at_mount_point" );
 
     _fileStopReading	= new TDEAction( i18n( "Stop Rea&ding" ), "process-stop", 0,
-				       TQT_TQOBJECT(this), TQT_SLOT( stopReading() ), actionCollection(),
+				       this, TQT_SLOT( stopReading() ), actionCollection(),
 				       "file_stop_reading" );
 
-    _fileQuit		= KStdAction::quit		( TQT_TQOBJECT(kapp), TQT_SLOT( quit()  		), actionCollection() );
-    _editCopy		= KStdAction::copy		( TQT_TQOBJECT(this), TQT_SLOT( editCopy() 		), actionCollection() );
-    _showToolBar	= KStdAction::showToolbar	( TQT_TQOBJECT(this), TQT_SLOT( toggleToolBar()		), actionCollection() );
-    _showStatusBar	= KStdAction::showStatusbar	( TQT_TQOBJECT(this), TQT_SLOT( toggleStatusBar()	), actionCollection() );
+    _fileQuit		= KStdAction::quit		( kapp, TQT_SLOT( quit()  		), actionCollection() );
+    _editCopy		= KStdAction::copy		( this, TQT_SLOT( editCopy() 		), actionCollection() );
+    _showToolBar	= KStdAction::showToolbar	( this, TQT_SLOT( toggleToolBar()		), actionCollection() );
+    _showStatusBar	= KStdAction::showStatusbar	( this, TQT_SLOT( toggleStatusBar()	), actionCollection() );
 
     _cleanupOpenWith	= new TDEAction( i18n( "Open With" ), 0,
-				       TQT_TQOBJECT(this), TQT_SLOT( cleanupOpenWith() ),
+				       this, TQT_SLOT( cleanupOpenWith() ),
 				       actionCollection(), "cleanup_open_with" );
 
     _treemapZoomIn 	= new TDEAction( i18n( "Zoom in" ), "zoom-in", Key_Plus,
-				       TQT_TQOBJECT(this), TQT_SLOT( treemapZoomIn() ),
+				       this, TQT_SLOT( treemapZoomIn() ),
 				       actionCollection(), "treemap_zoom_in" );
 
     _treemapZoomOut 	= new TDEAction( i18n( "Zoom out" ), "zoom-out", Key_Minus,
-				       TQT_TQOBJECT(this), TQT_SLOT( treemapZoomOut() ),
+				       this, TQT_SLOT( treemapZoomOut() ),
 				       actionCollection(), "treemap_zoom_out" );
 
     _treemapSelectParent= new TDEAction( i18n( "Select Parent" ), "go-up", Key_Asterisk,
-				       TQT_TQOBJECT(this), TQT_SLOT( treemapSelectParent() ),
+				       this, TQT_SLOT( treemapSelectParent() ),
 				       actionCollection(), "treemap_select_parent" );
 
     _treemapRebuild 	= new TDEAction( i18n( "Rebuild Treemap" ), 0,
-				       TQT_TQOBJECT(this), TQT_SLOT( treemapRebuild() ),
+				       this, TQT_SLOT( treemapRebuild() ),
 				       actionCollection(), "treemap_rebuild" );
 
     _showTreemapView	= new TDEToggleAction( i18n( "Show Treemap" ), Key_F9,
-					     TQT_TQOBJECT(this), TQT_SLOT( toggleTreemapView() ),
+					     this, TQT_SLOT( toggleTreemapView() ),
 					     actionCollection(), "options_show_treemap" );
 
     new TDEAction( i18n( "Help about Treemaps" ), "help", 0,
-		 TQT_TQOBJECT(this), TQT_SLOT( treemapHelp() ),
+		 this, TQT_SLOT( treemapHelp() ),
 		 actionCollection(), "treemap_help" );
 
-    TDEAction * pref	= KStdAction::preferences( TQT_TQOBJECT(this), TQT_SLOT( preferences()	), actionCollection() );
+    TDEAction * pref	= KStdAction::preferences( this, TQT_SLOT( preferences()	), actionCollection() );
 
     _reportMailToOwner	= new TDEAction( i18n( "Send &Mail to Owner" ), "mail_generic", 0,
-				       TQT_TQOBJECT(_treeView), TQT_SLOT( sendMailToOwner() ),
+				       _treeView, TQT_SLOT( sendMailToOwner() ),
 				       actionCollection(), "report_mail_to_owner" );
 
     _helpSendFeedbackMail = new TDEAction( i18n( "Send &Feedback Mail..." ), 0,
-					 TQT_TQOBJECT(this), TQT_SLOT( sendFeedbackMail() ),
+					 this, TQT_SLOT( sendFeedbackMail() ),
 					 actionCollection(), "help_send_feedback_mail" );
 
 
@@ -314,7 +314,7 @@ KDirStatApp::initActivityTracker()
     if ( ! doFeedbackReminder() )
 	return;
 
-    _activityTracker = new KActivityTracker( TQT_TQOBJECT(this), "Feedback",
+    _activityTracker = new KActivityTracker( this, "Feedback",
 					     INITIAL_FEEDBACK_REMINDER );
 
     connect( _activityTracker,  TQT_SIGNAL( thresholdReached() ),
diff --git a/kdirstat/ktreemapview.cpp b/kdirstat/ktreemapview.cpp
index 0e0553c..b8aaedd 100644
--- a/kdirstat/ktreemapview.cpp
+++ b/kdirstat/ktreemapview.cpp
@@ -409,7 +409,7 @@ KTreemapView::rebuildTreemap( KFileInfo *	newRoot,
 
     if ( ! canvas() )
     {
-	TQCanvas * canv = new TQCanvas( TQT_TQOBJECT(this) );
+	TQCanvas * canv = new TQCanvas( this );
 	TQ_CHECK_PTR( canv );
 	setCanvas( canv );
     }