Some functions werent declared problem

[kingsta]

Hi guys.

I have a little problem. I am a new one. I want to do basic tutorial in Qt.

@Notepad::Notepad(QObject *parent) :
QObject(parent)
{

QTextEdit *textEdit = new QTextEdit;
QPushButton *quitButton = new QPushButton("&Quit");

QObject::connect(quitButton, SIGNAL(clicked()),qApp, SLOT(quit()));

QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(textEdit);
layout->addWidget(quitButton);

setLayout(layout);

setWindowTitle(tr("Notepad"));

}

void Notepad::quit(){
QMessageBox messageBox;
messageBox.setWindowTitle(tr("Notepad"));
messageBox.setText(tr("Do you really want to quit?"));
messageBox.setStandartButtons(QMessageBox::Yes | QMessageBox::No);
messageBox.setDefaultButton(QMessageBox::No);

 if(messagebox.exec() == QMessageBox::Yes)
    qApp->quit();

}@

I got "setLayout, setWindowTitle, messageBox was not declared in this scope" error.
I got "Class MessageBox has no member named setStandartButtons" error.

I guess I didnt include some library. How can i fix them?

[qxoz]

First of all what basic tutorial you use?
Your Notepad class inherits QObject but you call functions which belongs to QWidget.
Try start from "http://qt-project.org/doc/qt-5.0/qtdoc/index.html":http://qt-project.org/doc/qt-5.0/qtdoc/index.html this point or use some book about Qt programming.

[kingsta]

I try to do "that":http://qt-project.org/doc/qt-4.8/gettingstartedqt.html tutorial. I use Qt 4.8. Do you think I use Qt 5.0?

[qxoz]

Nice example. If you write exactly as in tutorial it should work, and pay attention to the doc note from Volker on bottom .
Change QObject to QWidget and check is all includes are present.

[utcenter]

Well, this tutorial doesn't seem to include deriving from QObject.

Then again, the constructor code doesn't initialize neither a QObject nor a QWidget...

[kingsta]

You right example has a bug.

I found the caouse of error. I try to make a little different class like QDialog. I have MainWindow class and NotePad class. I wrote those codes in NotePad class. When i write those codes in MainWindow class, I have no problem. setLayout() and setWindowTitle() are work well in MainWindow class.

I realize If I declare a new class in QDialog, there is no problem but i cant declare in QObject. New class is NotePad in my question. How can i use setLayout() and setWindowTitle() functions in another class?