Problem with setCentralWidget

[blm]

I have in Konstruktor a setCentralWidget defined,

MainWin::MainWin()
{
    plotter = new Plotter; //Plotter is a custom Widget
    textEdit = new QTextEdit;
    setCentralWidget(plotter);
}

MainWin::MainWin()
{
    plotter = new Plotter; //Plotter is a custom Widget
    textEdit = new QTextEdit;
    setCentralWidget(plotter);
}

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in function changeToText(), and changeToPlotter(), I want to change the central Widget
so write:

MainWin::changeTotext()
{
    setCentralWidget(textEdit);
}
 
MainWin::changeToPlotter()
{
    setCentralWidget(plotter);
}

MainWin::changeTotext()
{
    setCentralWidget(textEdit);
}

MainWin::changeToPlotter()
{
    setCentralWidget(plotter);
}

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but at last i can`t change it, what`s wrong?

thanks for your help!

[aamer4yu]

How are u calling the changeToText and changeToPLotter functions ??

I am not sure if you can set central widget twice.
You may try this - set a QStackedWidget as central widget for the main window, and on the changeToText and changeToPLotter functions, set the text or plotter as the widget

[blm]

How are u calling the changeToText and changeToPLotter functions ??

I am not sure if you can set central widget twice.
You may try this - set a QStackedWidget as central widget for the main window, and on the changeToText and changeToPLotter functions, set the text or plotter as the widget

I call them like this:

Void MainWin::creatActions()
{
    ...
    connect(newAct, SIGNAL(triggered()), this, SLOT(changeToText()));
    ...
}

Void MainWin::creatActions()
{
    ...
    connect(newAct, SIGNAL(triggered()), this, SLOT(changeToText()));
    ...
}

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it`s a litte complex,
now i can see the TextEditor Window, if i call changeToText,
but if i call changeToPlotter further, got a error Message..

QStackedWidget is a good idea, i will try it .thanks

[blm]

You may try this - set a QStackedWidget as central widget for the main window, and on the changeToText and changeToPLotter functions, set the text or plotter as the widget

hallo friend!

now it Works! Thanks a lot!