diff --git a/kstyle/demo/oxygenmdidemowidget.cpp b/kstyle/demo/oxygenmdidemowidget.cpp
index 3e5422eb..8e761570 100644
--- a/kstyle/demo/oxygenmdidemowidget.cpp
+++ b/kstyle/demo/oxygenmdidemowidget.cpp
@@ -1,113 +1,114 @@
 //////////////////////////////////////////////////////////////////////////////
 // oxygenmdidemowidget.cpp
 // oxygen mdi windows demo widget
 // -------------------
 //
 // Copyright (c) 2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to
 // deal in the Software without restriction, including without limitation the
 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 // sell copies of the Software, and to permit persons to whom the Software is
 // furnished to do so, subject to the following conditions:
 //
 // The above copyright notice and this permission notice shall be included in
 // all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 // IN THE SOFTWARE.
 //////////////////////////////////////////////////////////////////////////////
 
 #include "oxygenmdidemowidget.h"
 
 #include <QMdiSubWindow>
 #include <QMenuBar>
 #include <QMenu>
 #include <QIcon>
 
 namespace Oxygen
 {
 
     //______________________________________________________________
     MdiDemoWidget::MdiDemoWidget( QWidget* parent ):
         DemoWidget( parent )
     {
         setLayout( new QVBoxLayout() );
+        layout()->setMargin(0);
         QMenuBar* menuBar = new QMenuBar( this );
         layout()->addWidget( menuBar );
 
         QWidget* widget = new QWidget( this );
         layout()->addWidget( widget );
         ui.setupUi( widget );
 
         QMenu* menu = menuBar->addMenu( i18n( "Layout" ) );
         connect( menu->addAction( i18n( "Tile" ) ), SIGNAL(triggered()), this, SLOT(setLayoutTiled()) );
         connect( menu->addAction( i18n( "Cascade" ) ), SIGNAL(triggered()), this, SLOT(setLayoutCascade()) );
         connect( menu->addAction( i18n( "Tabs" ) ), SIGNAL(triggered()), this, SLOT(setLayoutTabbed()) );
 
         menu = menuBar->addMenu( i18n( "Tools" ) );
         QAction* action;
         connect( action = menu->addAction( QIcon::fromTheme( QStringLiteral( "arrow-right" ) ), i18n( "Select Next Window" ) ), SIGNAL(triggered()), ui.mdiArea, SLOT(activateNextSubWindow()) );
         action->setShortcut( Qt::CTRL + Qt::Key_Tab );
         addAction( action );
 
         connect( action = menu->addAction( QIcon::fromTheme( QStringLiteral( "arrow-left" ) ), i18n( "Select Previous Window" ) ), SIGNAL(triggered()), ui.mdiArea, SLOT(activatePreviousSubWindow()) );
         action->setShortcut( Qt::CTRL + Qt::SHIFT + Qt::Key_Tab );
         addAction( action );
 
     }
 
     //______________________________________________________________
     void MdiDemoWidget::setLayoutTiled( void )
     {
         ui.mdiArea->setViewMode( QMdiArea::SubWindowView );
         ui.mdiArea->tileSubWindows();
     }
 
     //______________________________________________________________
     void MdiDemoWidget::setLayoutCascade( void )
     {
         ui.mdiArea->setViewMode( QMdiArea::SubWindowView );
         ui.mdiArea->cascadeSubWindows();
     }
 
     //______________________________________________________________
     void MdiDemoWidget::setLayoutTabbed( void )
     { ui.mdiArea->setViewMode( QMdiArea::TabbedView ); }
 
     //______________________________________________________________
     void MdiDemoWidget::benchmark( void )
     {
         if( !isVisible() ) return;
 
         if( true )
         {
             // slide windows
             foreach( QMdiSubWindow* window, ui.mdiArea->findChildren<QMdiSubWindow*>() )
             {
                 simulator().click( window );
                 simulator().slide( window, QPoint( 20, 20 ) );
                 simulator().slide( window, QPoint( -20, -20 ) );
             }
 
         }
 
         if( true )
         {
             foreach( QAbstractButton* button, ui.toolBox->findChildren<QAbstractButton*>() )
             { simulator().click( button ); }
 
             foreach( QAbstractButton* button, ui.toolBox->findChildren<QAbstractButton*>() )
             { simulator().click( button ); }
         }
 
         simulator().run();
 
     }
 }