diff --git a/src/difftextwindow.cpp b/src/difftextwindow.cpp
index ae18a59..5a2ffe2 100644
--- a/src/difftextwindow.cpp
+++ b/src/difftextwindow.cpp
@@ -1685,7 +1685,7 @@ bool DiffTextWindowFrame::eventFilter( TQObject* o, TQEvent* e )
       d->m_pLabel->setPalette( p );
       d->m_pTopLine->setPalette( p );
    }
-   if (TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(d->m_pFileSelection) && e->type()==TQEvent::Drop)
+   if (o == d->m_pFileSelection && e->type()==TQEvent::Drop)
    {
       TQDropEvent* d = static_cast<TQDropEvent*>(e);
       
diff --git a/src/directorymergewindow.cpp b/src/directorymergewindow.cpp
index 57f05aa..3ca33e7 100644
--- a/src/directorymergewindow.cpp
+++ b/src/directorymergewindow.cpp
@@ -2688,7 +2688,7 @@ DirectoryMergeInfo::DirectoryMergeInfo( TQWidget* pParent )
 
 bool DirectoryMergeInfo::eventFilter(TQObject*o, TQEvent* e)
 {
-   if ( e->type()==TQEvent::FocusIn && TQT_BASE_OBJECT(o)==TQT_BASE_OBJECT(m_pInfoList) )
+   if ( e->type()==TQEvent::FocusIn && o==m_pInfoList )
       emit gotFocus();
    return false;
 }
diff --git a/src/mergeresultwindow.cpp b/src/mergeresultwindow.cpp
index f52d0a3..1da3171 100644
--- a/src/mergeresultwindow.cpp
+++ b/src/mergeresultwindow.cpp
@@ -3199,7 +3199,7 @@ bool WindowTitleWidget::eventFilter( TQObject* o, TQEvent* e )
       m_pEncodingLabel->setPalette( p );
       m_pEncodingSelector->setPalette( p );
    }
-   if (TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pFileNameLineEdit) && e->type()==TQEvent::Drop)
+   if (o == m_pFileNameLineEdit && e->type()==TQEvent::Drop)
    {
       TQDropEvent* d = static_cast<TQDropEvent*>(e);
 
diff --git a/src/pdiff.cpp b/src/pdiff.cpp
index 25c042e..8cf9046 100644
--- a/src/pdiff.cpp
+++ b/src/pdiff.cpp
@@ -837,7 +837,7 @@ void KDiff3App::resizeEvent(TQResizeEvent* e)
 
 bool KDiff3App::eventFilter( TQObject* o, TQEvent* e )
 {
-   if( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pMergeResultWindow) )
+   if( o == m_pMergeResultWindow )
    {
       if ( e->type() == TQEvent::KeyPress )
       {  // key press
@@ -929,9 +929,9 @@ bool KDiff3App::eventFilter( TQObject* o, TQEvent* e )
          {
             raise();
             TQString filename = stringList.first();
-            if      ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow1) ) m_sd1.setFilename( filename );
-            else if ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow2) ) m_sd2.setFilename( filename );
-            else if ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow3) ) m_sd3.setFilename( filename );
+            if      ( o == m_pDiffTextWindow1 ) m_sd1.setFilename( filename );
+            else if ( o == m_pDiffTextWindow2 ) m_sd2.setFilename( filename );
+            else if ( o == m_pDiffTextWindow3 ) m_sd3.setFilename( filename );
             init();
          }
 #else
@@ -941,9 +941,9 @@ bool KDiff3App::eventFilter( TQObject* o, TQEvent* e )
          {
             raise();
             FileAccess fa( urlList.first().url() );
-            if      ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow1) ) m_sd1.setFileAccess( fa );
-            else if ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow2) ) m_sd2.setFileAccess( fa );
-            else if ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow3) ) m_sd3.setFileAccess( fa );
+            if      ( o == m_pDiffTextWindow1 ) m_sd1.setFileAccess( fa );
+            else if ( o == m_pDiffTextWindow2 ) m_sd2.setFileAccess( fa );
+            else if ( o == m_pDiffTextWindow3 ) m_sd3.setFileAccess( fa );
             init();
          }
 #endif
@@ -955,9 +955,9 @@ bool KDiff3App::eventFilter( TQObject* o, TQEvent* e )
          if ( bDecodeSuccess && canContinue() )
          {
             raise();
-            if      ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow1) ) m_sd1.setData(text);
-            else if ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow2) ) m_sd2.setData(text);
-            else if ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(m_pDiffTextWindow3) ) m_sd3.setData(text);
+            if      ( o == m_pDiffTextWindow1 ) m_sd1.setData(text);
+            else if ( o == m_pDiffTextWindow2 ) m_sd2.setData(text);
+            else if ( o == m_pDiffTextWindow3 ) m_sd3.setData(text);
             init();
          }
       }
@@ -1447,11 +1447,11 @@ void KDiff3App::slotSelectionStart()
    //editCopy->setEnabled( false );
    //editCut->setEnabled( false );
 
-   const TQObject* s = TQT_TQOBJECT(const_cast<TQT_BASE_OBJECT_NAME*>(sender()));
-   if (m_pDiffTextWindow1 && TQT_BASE_OBJECT_CONST(s)!=TQT_BASE_OBJECT(m_pDiffTextWindow1))   m_pDiffTextWindow1->resetSelection();
-   if (m_pDiffTextWindow2 && TQT_BASE_OBJECT_CONST(s)!=TQT_BASE_OBJECT(m_pDiffTextWindow2))   m_pDiffTextWindow2->resetSelection();
-   if (m_pDiffTextWindow3 && TQT_BASE_OBJECT_CONST(s)!=TQT_BASE_OBJECT(m_pDiffTextWindow3))   m_pDiffTextWindow3->resetSelection();
-   if (m_pMergeResultWindow && TQT_BASE_OBJECT_CONST(s)!=TQT_BASE_OBJECT(m_pMergeResultWindow)) m_pMergeResultWindow->resetSelection();
+   const TQObject* s = TQT_TQOBJECT(sender());
+   if (m_pDiffTextWindow1 && s!=m_pDiffTextWindow1)   m_pDiffTextWindow1->resetSelection();
+   if (m_pDiffTextWindow2 && s!=m_pDiffTextWindow2)   m_pDiffTextWindow2->resetSelection();
+   if (m_pDiffTextWindow3 && s!=m_pDiffTextWindow3)   m_pDiffTextWindow3->resetSelection();
+   if (m_pMergeResultWindow && s!=m_pMergeResultWindow) m_pMergeResultWindow->resetSelection();
 }
 
 void KDiff3App::slotSelectionEnd()