Some Qt errors - How to solve? - c++

Question

I have the following main.cpp file:
#include <QApplication>
#include "ui_checkabder.h"
#include <QDialog>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Ui::CheckAbder ui;
QDialog *dialog = new QDialog;
ui.setupUi(dialog);
dialog->show();
return app.exec();
}
And, get the following errors when trying to run the program:
C:/Users/avbder/Desktop/abder/main.cpp:7: error: 'CheckAbder' is not a member of 'Ui'
C:/Users/avbder/Desktop/abder/main.cpp:7: error: expected ';' before 'ui'
C:/Users/avbder/Desktop/abder/main.cpp:7: error: expected ';' before 'ui'
C:/Users/avbder/Desktop/abder/main.cpp:9: error: 'ui' was not declared in this scope
The contents of ui_checkabder.h is as follows:
/********************************************************************************
** Form generated from reading UI file 'checkabder.ui'
**
** Created: Mon Apr 18 10:01:09 2011
** by: Qt User Interface Compiler version 4.7.3
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/
#ifndef UI_CHECKABDER_H
#define UI_CHECKABDER_H
#include <QtCore/QVariant>
#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QButtonGroup>
#include <QtGui/QHBoxLayout>
#include <QtGui/QHeaderView>
#include <QtGui/QLabel>
#include <QtGui/QLineEdit>
#include <QtGui/QPushButton>
#include <QtGui/QVBoxLayout>
#include <QtGui/QWidget>
QT_BEGIN_NAMESPACE
class Ui_Form
{
public:
QVBoxLayout *verticalLayout;
QHBoxLayout *horizontalLayout;
QLabel *label;
QLineEdit *lineEdit;
QHBoxLayout *horizontalLayout_2;
QPushButton *okButton;
QPushButton *cancelButton;
void setupUi(QWidget *Form)
{
if (Form->objectName().isEmpty())
Form->setObjectName(QString::fromUtf8("Form"));
Form->resize(400, 300);
verticalLayout = new QVBoxLayout(Form);
verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
horizontalLayout = new QHBoxLayout();
horizontalLayout->setObjectName(QString::fromUtf8("horizontalLayout"));
label = new QLabel(Form);
label->setObjectName(QString::fromUtf8("label"));
QFont font;
font.setFamily(QString::fromUtf8("Comic Sans MS"));
font.setPointSize(16);
label->setFont(font);
horizontalLayout->addWidget(label);
lineEdit = new QLineEdit(Form);
lineEdit->setObjectName(QString::fromUtf8("lineEdit"));
horizontalLayout->addWidget(lineEdit);
verticalLayout->addLayout(horizontalLayout);
horizontalLayout_2 = new QHBoxLayout();
horizontalLayout_2->setObjectName(QString::fromUtf8("horizontalLayout_2"));
okButton = new QPushButton(Form);
okButton->setObjectName(QString::fromUtf8("okButton"));
okButton->setEnabled(false);
QFont font1;
font1.setFamily(QString::fromUtf8("Comic Sans MS"));
font1.setBold(true);
font1.setWeight(75);
okButton->setFont(font1);
horizontalLayout_2->addWidget(okButton);
cancelButton = new QPushButton(Form);
cancelButton->setObjectName(QString::fromUtf8("cancelButton"));
cancelButton->setFont(font1);
horizontalLayout_2->addWidget(cancelButton);
verticalLayout->addLayout(horizontalLayout_2);
retranslateUi(Form);
QMetaObject::connectSlotsByName(Form);
} // setupUi
void retranslateUi(QWidget *Form)
{
Form->setWindowTitle(QApplication::translate("Form", "Form", 0, QApplication::UnicodeUTF8));
label->setText(QApplication::translate("Form", "Name", 0, QApplication::UnicodeUTF8));
okButton->setText(QApplication::translate("Form", "OK", 0, QApplication::UnicodeUTF8));
cancelButton->setText(QApplication::translate("Form", "CANCEL", 0, QApplication::UnicodeUTF8));
} // retranslateUi
};
namespace Ui {
class Form: public Ui_Form {};
} // namespace Ui
QT_END_NAMESPACE
#endif // UI_CHECKABDER_H
Any ideas on how to solve those problems?
Thanks.

Answer 1

Your class name is Ui_Form and Ui::Form and not CheckAbder. You should rename it in Designer.

Answer 2

You need to understand uic a little bit. File name has nothing to do with generated Ui namespaces content. Your widget in .ui file is named "Form" not CheckAbder. You can solve your problem in two ways:
Start using Ui::Form in your .cpp file
Rename Form to CheckAbder in you .ui file
Also make sure, your .ui file is added to project, so it will automaticly generate new ui_*.h file after you change .ui

Answer 3

namespace Ui {
class Form: public Ui_Form {};
} // namespace Ui
should be
namespace Ui {
class CheckAbder: public Ui_Form {};
} // namespace Ui