Segfault with subclassed QMdiSubWindow

[truefusion]

I know where the problem is, but i have no idea how to fix it. The problem is located in websubwindow.cpp: when it tries to access the child widgets it segfaults, starting at the first vbox->addWidget().

The file structure is:
torah.cpp
torah.h
gui/websubwindow.cpp
gui/websubwindow.h

websubwindow.cpp

#include "websubwindow.h"
 
webSubWindow::webSubWindow(QWidget * parent, Qt::WindowFlags flags)
	: QMdiSubWindow(parent, flags)
	{
		setWindowTitle(tr("Personal"));
		setAttribute(Qt::WA_DeleteOnClose);
 
		vbox->addWidget(addressLine);
		vbox->addWidget(progressBar);
		vbox->addWidget(webView);
		vbox->addWidget(statusBar);
 
		centralWidget->setLayout(vbox);
 
		progressBar->setHidden(true);
 
		addressLine->setEditText("http://");
 
		setWidget(centralWidget);
 
		connect(addressLine, SIGNAL(activated(const QString &)), this, SLOT(goToUrl(const QString &)));
		//connect(addressLine->lineEdit(), SIGNAL(returnPressed()), this, SLOT(goToUrl()));
	}
 
webSubWindow::~webSubWindow()
	{
		delete centralWidget;
		delete vbox;
		delete addressLine;
		delete progressBar;
		delete webView;
		delete url;
	}

#include "websubwindow.h"

webSubWindow::webSubWindow(QWidget * parent, Qt::WindowFlags flags)
	: QMdiSubWindow(parent, flags)
	{
		setWindowTitle(tr("Personal"));
		setAttribute(Qt::WA_DeleteOnClose);

		vbox->addWidget(addressLine);
		vbox->addWidget(progressBar);
		vbox->addWidget(webView);
		vbox->addWidget(statusBar);

		centralWidget->setLayout(vbox);

		progressBar->setHidden(true);

		addressLine->setEditText("http://");

		setWidget(centralWidget);

		connect(addressLine, SIGNAL(activated(const QString &)), this, SLOT(goToUrl(const QString &)));
		//connect(addressLine->lineEdit(), SIGNAL(returnPressed()), this, SLOT(goToUrl()));
	}

webSubWindow::~webSubWindow()
	{
		delete centralWidget;
		delete vbox;
		delete addressLine;
		delete progressBar;
		delete webView;
		delete url;
	}

To copy to clipboard, switch view to plain text mode 

websubwindow.h

#ifndef WEBSUBWINDOW_H
#define WEBSUBWINDOW_H
 
#include <QtGui/QMdiSubWindow>
#include <QtGui/QWidget>
#include <QtGui/QVBoxLayout>
#include <QtGui/QComboBox>
#include <QtGui/QProgressBar>
#include <QtGui/QStatusBar>
 
#include <QtCore/QUrl>
 
#include <QtWebKit/QWebView>
 
class webSubWindow : public QMdiSubWindow
	{
		Q_OBJECT
 
		private:
			QWidget *centralWidget;
			QVBoxLayout *vbox;
			QUrl *url;
 
		public:
			webSubWindow(QWidget * parent = 0, Qt::WindowFlags flags = 0);
			~webSubWindow();
			QComboBox *addressLine;
			QProgressBar *progressBar;
			QWebView *webView;
			QStatusBar *statusBar;
 
		private slots:
			void goToUrl(const QString &url);
	};
 
#endif // WEBSUBWINDOW_H

#ifndef WEBSUBWINDOW_H
#define WEBSUBWINDOW_H

#include <QtGui/QMdiSubWindow>
#include <QtGui/QWidget>
#include <QtGui/QVBoxLayout>
#include <QtGui/QComboBox>
#include <QtGui/QProgressBar>
#include <QtGui/QStatusBar>

#include <QtCore/QUrl>

#include <QtWebKit/QWebView>

class webSubWindow : public QMdiSubWindow
	{
		Q_OBJECT

		private:
			QWidget *centralWidget;
			QVBoxLayout *vbox;
			QUrl *url;

		public:
			webSubWindow(QWidget * parent = 0, Qt::WindowFlags flags = 0);
			~webSubWindow();
			QComboBox *addressLine;
			QProgressBar *progressBar;
			QWebView *webView;
			QStatusBar *statusBar;

		private slots:
			void goToUrl(const QString &url);
	};

#endif // WEBSUBWINDOW_H

To copy to clipboard, switch view to plain text mode 

torah.cpp

#include "torah.h"
#include "ui_torah.h"
#include "gui/websubwindow.h"
 
Torah::Torah(QWidget *parent)
	: QMainWindow(parent), ui(new Ui::TorahClass)
	{
		ui->setupUi(this);
 
		ui->action_Refresh->setVisible(false);
		ui->action_Stop->setVisible(false);
		ui->action_Back->setEnabled(false);
		ui->action_Forward->setEnabled(false);
 
		connect(ui->actionNew_Tab, SIGNAL(triggered()), this, SLOT(addTab()));
	}
 
Torah::~Torah()
	{
		delete ui;
	}
 
void Torah::addTab()
	{
		webSubWindow *child = new webSubWindow;
		//QMdiSubWindow *child = new QMdiSubWindow;
		ui->mdiArea->addSubWindow(child);
		child->show();
	}

#include "torah.h"
#include "ui_torah.h"
#include "gui/websubwindow.h"

Torah::Torah(QWidget *parent)
	: QMainWindow(parent), ui(new Ui::TorahClass)
	{
		ui->setupUi(this);

		ui->action_Refresh->setVisible(false);
		ui->action_Stop->setVisible(false);
		ui->action_Back->setEnabled(false);
		ui->action_Forward->setEnabled(false);

		connect(ui->actionNew_Tab, SIGNAL(triggered()), this, SLOT(addTab()));
	}

Torah::~Torah()
	{
		delete ui;
	}

void Torah::addTab()
	{
		webSubWindow *child = new webSubWindow;
		//QMdiSubWindow *child = new QMdiSubWindow;
		ui->mdiArea->addSubWindow(child);
		child->show();
	}

To copy to clipboard, switch view to plain text mode 

torah.h

#ifndef TORAH_H
#define TORAH_H
 
#include <QtGui/QMainWindow>
 
namespace Ui
{
	class TorahClass;
}
 
class Torah : public QMainWindow
	{
		Q_OBJECT
 
		public:
			Torah(QWidget *parent = 0);
			~Torah();
 
		private:
			Ui::TorahClass *ui;
 
		private slots:
			void addTab();
	};
 
#endif // TORAH_H

#ifndef TORAH_H
#define TORAH_H

#include <QtGui/QMainWindow>

namespace Ui
{
	class TorahClass;
}

class Torah : public QMainWindow
	{
		Q_OBJECT

		public:
			Torah(QWidget *parent = 0);
			~Torah();

		private:
			Ui::TorahClass *ui;

		private slots:
			void addTab();
	};

#endif // TORAH_H

To copy to clipboard, switch view to plain text mode 

Any help is appreciated; i've been trying many things to try and solve the problem, but i'm getting no where.

[jogeshwarakundi]

You have not allocated the memory for progressBar, addressLine etc