Previous frame inner to this frame(corrupt stack?)

[coralbird]

I am building a c/s system,but now I am runing into the trouble as title.
when client process receive a message from server process,it show a modeless dialog,and when user click close button, it hide the dialog.

at first everything is ok,and then the client process is crashed. gdb shows
the error as title.


below is my way how to realize this.


class ApplicationWindow:: public QMainWindow
{
....
protected:

CControlDlg m_controlDlg; //inherit from QDialog,and I pass this to it as it's parent window in ApplicationWindow's Construct function
}


display the dialog:
ApplicationWindow::showControlDlg()
{
m_control.show()
}

hide the dialog:

CControlDlg::closeEvent(QCloseEvent* e)
{
this->hide();
}

thanks anyone who can give me some idea!

[zlatko]

Where actually you have crash?
In calling hide() method?

[coralbird]

Where actually you have crash?
In calling hide() method?

In calling show() method.

[zlatko]

Hm then show ApplicationWindow's Construct function

[wysota]

CControlDlg::closeEvent(QCloseEvent* e)
{
this->hide();
}

CControlDlg::closeEvent(QCloseEvent* e)
{
this->hide();
}

To copy to clipboard, switch view to plain text mode 

Won't it make an infinite loop?

[coralbird]

CControlDlg::closeEvent(QCloseEvent* e)
{
this->hide();
}

CControlDlg::closeEvent(QCloseEvent* e)
{
this->hide();
}

To copy to clipboard, switch view to plain text mode 

Won't it make an infinite loop?

it will not,i tested as below:
CControlDlg::closeEvent(QCloseEvent* e)
{
Q_ASSERT(FALSE),
this->hide();
}

Q_ASSERT(FALSE) only execute once.

[zlatko]

...,m_controlExecDlg(this) what is this? You try init your dialog as app window

Try next code

class ApplicationWindow:: public QMainWindow
{
....
protected:
CControlDlg *m_controlDlg; //inherit from QDialog,and I pass this to it as it's parent window in ApplicationWindow's Construct function
}
 
ApplicationWindow::ApplicationWindow(): QMainWindow( 0, "HMI", estructiveClose|Qt::WStyle_Customize)
{
  m_controlDlg = new CControlDlg(this);
}

class ApplicationWindow:: public QMainWindow
{
....
protected:
CControlDlg *m_controlDlg; //inherit from QDialog,and I pass this to it as it's parent window in ApplicationWindow's Construct function
}

ApplicationWindow::ApplicationWindow(): QMainWindow( 0, "HMI", estructiveClose|Qt::WStyle_Customize)
{
  m_controlDlg = new CControlDlg(this);
}

To copy to clipboard, switch view to plain text mode 

[coralbird]

...,m_controlExecDlg(this) what is this? You try init your dialog as app window

Try next code

class ApplicationWindow:: public QMainWindow
{
....
protected:
CControlDlg *m_controlDlg; //inherit from QDialog,and I pass this to it as it's parent window in ApplicationWindow's Construct function
}
 
ApplicationWindow::ApplicationWindow(): QMainWindow( 0, "HMI", estructiveClose|Qt::WStyle_Customize)
{
  m_controlDlg = new CControlDlg(this);
}

class ApplicationWindow:: public QMainWindow
{
....
protected:
CControlDlg *m_controlDlg; //inherit from QDialog,and I pass this to it as it's parent window in ApplicationWindow's Construct function
}

ApplicationWindow::ApplicationWindow(): QMainWindow( 0, "HMI", estructiveClose|Qt::WStyle_Customize)
{
  m_controlDlg = new CControlDlg(this);
}

To copy to clipboard, switch view to plain text mode 

It still does not work.

[coralbird]

by the way,I pass ApplicationWindow's pointer to a QThread object, and in QThread::run() calls ApplicationWindow::ShowControlDlg().

[zlatko]

and what is the result?

[wysota]

1. Try to clean your object code (make clean) and build it again.
2. Don't access GUI functions from within threads. It's forbidden

[coralbird]

1. Try to clean your object code (make clean) and build it again.
2. Don't access GUI functions from within threads. It's forbidden

even hide() and show()?I can do it in MFC.

[coralbird]

and what is the result?

result is can show dialog successful serval times .

[coralbird]

Hm then show ApplicationWindow's Construct function

ApplicationWindow::ApplicationWindow()
: QMainWindow( 0, "HMI", estructiveClose|Qt::WStyle_Customize) ,m_controlExecDlg(this)