error: request for member `ok' in `xxx

[intek]

Very new to QT:

error: request for member `ok' in `xxx', which is of non-class type `xxx ()()'

What does this mean?

I'm just trying this:

xxx x();

x.ok();

thanks

[JimDaniel]

I have some general programming advice for you. Start naming your classes and methods with more descriptive names. It makes things far easier to understand - for you and for others reading your code.

I need to see your class, but it sounds like ok(); is not a member of your class. Can you copy it here?

[intek]

class Gui : public QObject
    {
         Q_OBJECT
 
        private:
            QVBoxLayout     *_layout;
            Widget          *_widget;
            LineEdit        *_lineEdit;
 
 
        public:
 
           Gui () :  _layout( new QVBoxLayout() ),
                     _widget( new Widget() ),
                     _lineEdit( new LineEdit() )
           {
                _layout->addWidget( _widget );
                _widget->setLayout( _layout );
           }
 
        void ok() { }
 
 
    };

class Gui : public QObject
    {
         Q_OBJECT

        private:
            QVBoxLayout     *_layout;
            Widget          *_widget;
            LineEdit        *_lineEdit;


        public:

           Gui () :  _layout( new QVBoxLayout() ),
                     _widget( new Widget() ),
                     _lineEdit( new LineEdit() )
           {
                _layout->addWidget( _widget );
                _widget->setLayout( _layout );
           }

        void ok() { }


    };

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[pastor]

1) Did you include header with GUI class declaration?
2) Try this code:

xxx x;
x.ok();

xxx x(); - this is function declaration which gets "void" and returns "xxx".

[JimDaniel]

It seems to me you are going about this a bit wrong. I'm not sure, but take a look at this program which I think does something like what you intend:

//main.cpp
#include <QApplication>
#include "MyGui.h"
 
int main(int argc, char * argv[])
{
    QApplication app(argc, argv);
 
    MyGui test_gui;
    test_gui.ok();
 
    return app.exec();
}
 
//MyGui.h
#include <QtGui>
class MyGui : public QWidget
{
    Q_OBJECT
 
    public:
        MyGui();
        ~MyGui();
 
        void ok();
 
    private:
        QLineEdit * m_line_edit;  
};
 
//MyGui.cpp
#include "MyGui.h"
 
MyGui::MyGui()
{
    m_line_edit = new QLineEdit();
 
    QVBoxLayout * layout = new QVBoxLayout();
    layout->addWidget(m_line_edit);
 
    setLayout(layout);
}
 
MyGui::~MyGui(){}
 
void MyGui::ok()
{
    m_line_edit->setText("Everything is OK!");
}

//main.cpp
#include <QApplication>
#include "MyGui.h"

int main(int argc, char * argv[])
{
    QApplication app(argc, argv);

    MyGui test_gui;
    test_gui.ok();

    return app.exec();
}

//MyGui.h
#include <QtGui>
class MyGui : public QWidget
{
    Q_OBJECT

    public:
        MyGui();
        ~MyGui();

        void ok();

    private:
        QLineEdit * m_line_edit;  
};

//MyGui.cpp
#include "MyGui.h"

MyGui::MyGui()
{
    m_line_edit = new QLineEdit();

    QVBoxLayout * layout = new QVBoxLayout();
    layout->addWidget(m_line_edit);

    setLayout(layout);
}

MyGui::~MyGui(){}

void MyGui::ok()
{
    m_line_edit->setText("Everything is OK!");
}

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[intek]

Jim, that looks great, but how do I show a dialog with the lineedit. I want the gui object to have a function called Show() so I can call that in the main.

void Show() {
QDialog dlg;
... (include line edit)
dlg.show
}

void Show() {
QDialog dlg;
... (include line edit)
dlg.show
}

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Thanks!

[JimDaniel]

It sounds like you need to inherit from QDialog and make your own dialog box with a line edit. Then you create a method within your main window called showDialog() or something. You don't want to use show() as QWidget already has a method called show(); Then inside showDialog() you would either create the Dialog object as a non-modal or modal dialog. Does that make sense? I'm not sure I'm explaining it well.

Also, Qt provides a handful of standard pre-built dialogues that you may not be aware of: QFileDialog, QInputDialog, QProgressDialog, QFontDialog, QColorDialog
So inside showDialog() you could do this:

MyGui::showDialog()
{
    QString text = QInputDialog::getText(this, tr("QInputDialog::getText()"),
                                              tr("User name:"), QLineEdit::Normal,
                                              QDir::home().dirName(), &ok);
    //do something with text...
}

MyGui::showDialog()
{
    QString text = QInputDialog::getText(this, tr("QInputDialog::getText()"),
                                              tr("User name:"), QLineEdit::Normal,
                                              QDir::home().dirName(), &ok);
    //do something with text...
}

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I just took that from the documentation example.