QLayout: Attempting to add QLayout "" to QMainWindow "", which already has a layout

kahlenberg

Hello,
I have problems regarding to layout of QMainWindow. I know QMainWindow has already layout, but if I try to create QHBoxLayout, I get this warning:

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) 
{
    QStackedWidget *stackedWidget = new QStackedWidget(this);
    QWidget *widget = new QWidget();
    QMenu * fileMenu = menuBar()->addMenu(tr("&File"));
    QHBoxLayout *layout = new QHBoxLayout(this);  
    // QTreeWidget *tree   = new QTreeWidget(this);
}

mainwindow.h

class MainWindow : public QMainWindow
{

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:

};

pro file:

QT       += core gui xml network testlib

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = SCADA
TEMPLATE = app


SOURCES +=  main.cpp\
            mainwindow.cpp

HEADERS  += mainwindow.h

kahlenberg

Sorry,
I solved the Problem.

QHBoxLayout *layout = new QHBoxLayout(widget);  // not this :)