Dialog does not close correctly

[OlivierDz]

Hello,
I have a dialog box with a custom "Cancel" button. The "Cancel" button clicked event is connected to the QDialog close slot.
When I click this "Cancel" button, all the widgets of the dialog box disapeared but the dialog itself does not close. When I click the cross at the top-right corner of the dialog, everything is close correctly. I don't know what I'm doing wrong. Here is a part of my code :

    // Open the dialog
    CMyDialog *child = new CMyDialog ();
    child->setAttribute(Qt::WA_DeleteOnClose);
    m_mdiArea->addSubWindow(child);
    child->show();

    // Dialog's Constructor 
    CMyDialog ::CMyDialog (QWidget *parent) :
    QDialog(parent),
    ui(new Ui::CMyDialog )
    {
      ui->setupUi(this);
      connect(ui->m_btCancel, SIGNAL(clicked()), this, SLOT(close()));
      ...
    }

Any help is welcome. Thanks.

[JonB]

@OlivierDz
Because you are putting this dialog/window/widget into an QMdiSubWindow you must not close the dialog itself, you must perform such operations on the MDI window which owns/shows it, That is what the the "cross" is doing. You can access the parent MDI subwindow via child->parentWidget() if you need to.

[OlivierDz]

@JonB said in Dialog does not close correctly:

Thanks, it works now.

I created a custom slot for the Cancel button in my CMyDialog class.
I this slot a put this->parentWidget()->close().
This solved the problem.