qt segmentation fault

binarybob0001 · 12-08-2007, 08:31 PM

Well, I can't be sure it's not my own files, but would one of you experts take a look at this code and see if there is cause for a segmentation fault. I have tried tracing it do the cerr statements but the fault seems to occur on the return of the call to down(QListViewItem* lvi, const QPoint& p, int col).

Code:

#include "FileView.h"
#include <iostream>

QFileView::QFileView()
{
  lv = new QListView(this);
  lv->addColumn( "File" );
  lv->addColumn( "Owner" ); 
  lv->addColumn( "Group" );
  lv->addColumn( "Permissions" ); 

  populate();
  bup = new QPushButton("Up", this);
  connect(bup, SIGNAL(clicked()), this, SLOT(up()) );
  connect(lv, SIGNAL(doubleClicked( QListViewItem*, const QPoint &, int)), this, SLOT(down(QListViewItem*, const QPoint &, int)) );
}

void QFileView::resizeEvent(QResizeEvent* re)
{
  lv->move(0, bup->height() );
  lv->resize(re->size().width(), re->size().height() - bup->height() );
}

void QFileView::populate()
{
  fi.open();
  while( fi.nextFile())
  {
    if ( !fi.isHidden() )
      new QListViewItem( lv, fi.getName().c_str(), fi.getOwner().c_str(), fi.getGroup().c_str(), fi.getPermissions().c_str() );
  }
  fi.close();
}

void QFileView::up()
{
  fi.up();
  lv->clear();
  populate();
}

void QFileView::down(QListViewItem* lvi, const QPoint& p, int col)
{
  if(fi.isDir(lvi->text(0)))
  {
    fi.down(lvi->text(0));
    lv->clear();
    populate();
  }
}

graemef · 12-09-2007, 01:12 AM

With a seg fault the easiest way to work out what is going on is to use a debugger and generate a stack trace. If you use KDevelop then GDB is integrated into it and you can quickly see where the problem is.