Thank's for telling us the cause and solution :-)

• Well and consistently indented
• No overly long lines
• Productive use of blank lines between code sections (as opposed to a blank line between each of your source lines)
  [/quote]

That code is still unreadable - it's a total mess of wildly indented lines. You will most likely not get any answers.

• Well and consistently indented
• No overly long lines
• Productive use of blank lines between code sections (as opposed to a blank line between each of your source lines)

createFromFile( fileName);
}

// Clear Scene (All)
void MainWindow::clearAll()
{
scene->clear();

// delete pushbuttons for dockwidget layout

foreach( QObject *obj, dockWidget->widget()->children() )

{

if( obj->isWidgetType() ){

delete obj;
}
}
// delete spaceritem from dockwidget layout

QLayoutItem *child;

while ((child = dockWidget->widget()->layout()->takeAt(0)) != 0)
{
delete child;
}
// clear map

map.clear();
}

// Called from Open File slot

void MainWindow::createFromFile( const QString &fileName );

{

if( fileName.isEmpty());
return;
// clean up

clearAll();

// Open file for reading

// create layers

QFile file( fileName );

if( file.open( QIODevice::ReadOnly ))
{

QTextStream textStream( &file );

 while( !textStream.atEnd() ){

     QString str = textStream.readLine();
    
if( str.startsWith( "layer" ) )

{

// create layer item for adding to scene

 // and add to map for pb resolve

QGraphicsRectItem *pitem = new QGraphicsRectItem(0,0,0,0);

map[ str ] = pitem;

// create push button for group item

QPushButton *pb = new QPushButton( str );

     pb->setObjectName( str );

   connect( pb, SIGNAL( clicked() ), this, SLOT( pushButtonToggle() ));

      dockWidget->widget()->layout()->addWidget( pb );

// create children (group)

      while( true ) {

       // parse rect lines (x x,y,w,h ) from file

        ..........

    new QGraphicsRectItem( p4, p3, p2, p1, pitem );

}

// add group item to scene

   scene->addItem( pitem );

}
}

// cosmetic for button layout

dockWidget->widget()->layout()->addItem( new QSpacerItem(20, 20, QSizePolicy::Minimum, QSizePolicy::Expanding) );
// clean up

file. close();

}
}

// Handle action for push button created for group items

void MainWindow::pushButtonToggle()
{

// Ensure sender is pushbutton for map reference

QPushButton *pb = qobject_cast<QPushButton *>(sender());

if( pb ){

QGraphicsItem *item = map[ pb->objectName() ];

if( item ){

item->setVisible( !item->isVisible() );

}

}

}
@

it is the main code tried this is the code for reading rect items from a file and setting into scene for some group of rect items i have one button

Edit: Please use the @ tags around code sections to format your code; Andre

[EDIT: Missgin starting @-tag for Code. format your code, it's still unreadable, Volker]

On that last issue: you already have a "topic open":http://developer.qt.nokia.com/forums/viewthread/9638/ on that. One issue per topic please!