type casting 5 levels down no error but not proper

**sujan.dasmahapatra** · 24th April 2012, 12:58

I have my mainwindow which is QMainWindow the parent of all my other classes. I am type casting upwards from 5 levels down using reinterpret_cast, to access the mainwindow to display message using statusBar(), but when type casting it's not giving error but when accessing mainwindow->statusBar() it's crashing.

please check the code snippet below:

Qt Code:

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QWidget *wid  = reinterpret_cast<QWidget *>(parent());
CSheet *sheet = reinterpret_cast<CSheet *>(wid->parent());
QScrollBar *scrollBar = reinterpret_cast<QScrollBar *>(sheet->parent());
CTabWidget *tabWid = reinterpret_cast<CTabWidget *>(scrollBar->parent());
CDataPage  *dataPage = reinterpret_cast<CDataPage *>(tabWid->parent());
MainWindow *mainwin = reinterpret_cast<MainWindow *>(dataPage->parent());
mainwin->statusBar()->showMessage(tr("A new plot being added!!"),5000); //[I][SIZE=7]Here it is crashing[/SIZE][/I]

QWidget *wid  = reinterpret_cast<QWidget *>(parent());
CSheet *sheet = reinterpret_cast<CSheet *>(wid->parent());
QScrollBar *scrollBar = reinterpret_cast<QScrollBar *>(sheet->parent());
CTabWidget *tabWid = reinterpret_cast<CTabWidget *>(scrollBar->parent());
CDataPage  *dataPage = reinterpret_cast<CDataPage *>(tabWid->parent());
MainWindow *mainwin = reinterpret_cast<MainWindow *>(dataPage->parent());
mainwin->statusBar()->showMessage(tr("A new plot being added!!"),5000); //[I][SIZE=7]Here it is crashing[/SIZE][/I]

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please help me someone whats going wrong in this. Thanks a lot for any help. Sujan