[Qt-interest] setLayout warning ?

[Gan Xiebin]

Hi,all.

I got a problem when i use "setLayout" to complete my " find dialog".

code:
warning

// AutoSearchDlg.h
class AutoSearchDlg : public QDialog
{
     Q_OBJECT

public:
     AutoSearchDlg(QWidget *parent = 0);
public slots:
     void SetupDialog();

private:
     QLabel *textLabel;
     QLabel *ipLabel;
     QLineEdit *ipLineEdit;
     QDialogButtonBox *buttonBox;
     QPushButton *findButton;

QGridLayout *buttomLayout;
QVBoxLayout *mainLayout;

};


// AutoSearchDlg.cpp
AutoSearchDlg::AutoSearchDlg(QWidget *parent)
     : QDialog(parent)
{

}

void AutoSearchDlg::SetupDialog()
{

     textLabel = new QLabel(tr("Please input IP address and mask for
network search.\n"));

     ipLabel = new QLabel(tr("IP Address:"));
     ipLineEdit = new QLineEdit;
     ipLabel->setBuddy(ipLineEdit);

     findButton = new QPushButton(tr("&Find"));
     findButton->setDefault(true);


     buttomLayout = new QGridLayout;
     buttomLayout->addWidget(ipLabel, 0, 0);
     buttomLayout->addWidget(ipLineEdit, 0, 1);
     buttomLayout->addWidget(buttonBox,2,2);

     mainLayout = new QVBoxLayout;
     mainLayout->addWidget(textLabel);
     mainLayout->addLayout(buttomLayout);

     setLayout(mainLayout);

     exec();

}



// mainwindwo.cpp
#include "AutoSearchDlg.h"

MainWindow::MainWindow()
{
// create munu etc...
    AutoSearchAct = new QAction(tr("Auto Search"), this);
    connect(AutoSearchAct, SIGNAL(triggered()), new AutoSearchDlg(),
SLOT(SetupDialog()));

}



 It's fined when i first triggered the "search" action on my main window,
but after that, when i triggered that  action, the warning message
shows like that..
----------
QWidget::setLayout: Attempting to set QLayout "" on AutoSearchDlg "",
which already has a layout
------------

What can I do?

Thanks!