Why do I get these errors C2134, C4430 etc, in VS with QT?

taulant01

I have a task to do an OpenGL application in Visual Studio with the QT add-on.

I am trying to compile the code but I am having some errors. This is happening when I PROMOTE the WIDGET where I want to display the OpenGL stuff, to the class that i have created.

here are the errors:

Error	error C2143: syntax error : missing ';' before '*'	32	1	QTOpenGLVS
Error	error C4430: missing type specifier - int assumed. Note: C++ does not support default-int	32	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	48	1	QTOpenGLVS
Error	error C2061: syntax error : identifier 'QTOpenGLVS'	48	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	49	1	QTOpenGLVS
Error	error C2227: left of '->setObjectName' must point to class/struct/union/generic type	49	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	53	1	QTOpenGLVS
Error	error C2227: left of '->sizePolicy' must point to class/struct/union/generic type	53	1	QTOpenGLVS
Error	error C2228: left of '.hasHeightForWidth' must have class/struct/union	53	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	54	1	QTOpenGLVS
Error	error C2227: left of '->setSizePolicy' must point to class/struct/union/generic type	54	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	56	1	QTOpenGLVS
Error	error C2143: syntax error : missing ';' before '*'	32	1	QTOpenGLVS
Error	error C4430: missing type specifier - int assumed. Note: C++ does not support default-int	32	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	48	1	QTOpenGLVS
Error	error C2061: syntax error : identifier 'QTOpenGLVS'	48	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	49	1	QTOpenGLVS
Error	error C2227: left of '->setObjectName' must point to class/struct/union/generic type	49	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	53	1	QTOpenGLVS
Error	error C2227: left of '->sizePolicy' must point to class/struct/union/generic type	53	1	QTOpenGLVS
Error	error C2228: left of '.hasHeightForWidth' must have class/struct/union	53	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	54	1	QTOpenGLVS
Error	error C2227: left of '->setSizePolicy' must point to class/struct/union/generic type	54	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	56	1	QTOpenGLVS
Error	error C2143: syntax error : missing ';' before '*'	32	1	QTOpenGLVS
Error	error C4430: missing type specifier - int assumed. Note: C++ does not support default-int	32	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	48	1	QTOpenGLVS
Error	error C2061: syntax error : identifier 'QTOpenGLVS'	48	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	49	1	QTOpenGLVS
Error	error C2227: left of '->setObjectName' must point to class/struct/union/generic type	49	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	53	1	QTOpenGLVS
Error	error C2227: left of '->sizePolicy' must point to class/struct/union/generic type	53	1	QTOpenGLVS
Error	error C2228: left of '.hasHeightForWidth' must have class/struct/union	53	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	54	1	QTOpenGLVS
Error	error C2227: left of '->setSizePolicy' must point to class/struct/union/generic type	54	1	QTOpenGLVS
Error	error C2065: 'widget' : undeclared identifier	56	1	QTOpenGLVS

The classes that i have are the main.cpp, qtopenglvs.cpp and the header file: qtopenglvs.h

main.cpp:

#include "qtopenglvs.h"
#include <QtWidgets/QApplication>
#include "MyGlWindow.h"


void init(){

}
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTOpenGLVS w;
    w.show();
    return a.exec();
}

qtopenglvs.cpp

#include "qtopenglvs.h"
#include <GL/glut.h>

QTOpenGLVS::QTOpenGLVS(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
}

void QTOpenGLVS::initiliazeGL(){
 	glClearColor(1, 1, 0, 1);
}
void QTOpenGLVS::paintGL(){

}
void QTOpenGLVS::resizeGL(int w, int h){

}

qtopenglvs.h

#ifndef QTOPENGLVS_H
#define QTOPENGLVS_H

#include <QtWidgets/QMainWindow>
#include "ui_qtopenglvs.h"

class QTOpenGLVS : public QMainWindow
{
    Q_OBJECT

public:
    explicit QTOpenGLVS(QWidget *parent = 0);

    void initiliazeGL();
    void paintGL();
    void resizeGL(int w, int h);

private:
    Ui::QTOpenGLVSClass ui;
};

#endif // QTOPENGLVS_H

EDITED
ui_qtopenglvs.h:

/*******************************************************************************    *
** Form generated from reading UI file 'qtopenglvs.ui'
**
** Created by: Qt User Interface Compiler version 5.5.1
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_QTOPENGLVS_H
#define UI_QTOPENGLVS_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QHBoxLayout>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QMainWindow>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QSpacerItem>
#include <QtWidgets/QVBoxLayout>
#include <QtWidgets/QWidget>
#include "qtopenglvs.h"

QT_BEGIN_NAMESPACE

class Ui_QTOpenGLVSClass
{
public:
    QWidget *centralWidget;
    QHBoxLayout *horizontalLayout;
    QTOpenGLVS *widget;
    QVBoxLayout *verticalLayout;
    QSpacerItem *verticalSpacer;
    QPushButton *pushButton;

void setupUi(QMainWindow *QTOpenGLVSClass)
{
    if (QTOpenGLVSClass->objectName().isEmpty())
        QTOpenGLVSClass->setObjectName(QStringLiteral("QTOpenGLVSClass"));
    QTOpenGLVSClass->resize(834, 552);
    centralWidget = new QWidget(QTOpenGLVSClass);
    centralWidget->setObjectName(QStringLiteral("centralWidget"));
    horizontalLayout = new QHBoxLayout(centralWidget);
    horizontalLayout->setSpacing(6);
    horizontalLayout->setContentsMargins(11, 11, 11, 11);
    horizontalLayout->setObjectName(QStringLiteral("horizontalLayout"));
    widget = new QTOpenGLVS(centralWidget);
    widget->setObjectName(QStringLiteral("widget"));
    QSizePolicy sizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
    sizePolicy.setHorizontalStretch(0);
    sizePolicy.setVerticalStretch(0);
    sizePolicy.setHeightForWidth(widget->sizePolicy().hasHeightForWidth());
    widget->setSizePolicy(sizePolicy);

    horizontalLayout->addWidget(widget);

    verticalLayout = new QVBoxLayout();
    verticalLayout->setSpacing(6);
    verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
    verticalSpacer = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding);

    verticalLayout->addItem(verticalSpacer);

    pushButton = new QPushButton(centralWidget);
    pushButton->setObjectName(QStringLiteral("pushButton"));

    verticalLayout->addWidget(pushButton);


    horizontalLayout->addLayout(verticalLayout);

    QTOpenGLVSClass->setCentralWidget(centralWidget);

    retranslateUi(QTOpenGLVSClass);
    QObject::connect(pushButton, SIGNAL(clicked()), QTOpenGLVSClass, SLOT(close()));

    QMetaObject::connectSlotsByName(QTOpenGLVSClass);
} // setupUi

void retranslateUi(QMainWindow *QTOpenGLVSClass)
{
    QTOpenGLVSClass->setWindowTitle(QApplication::translate("QTOpenGLVSClass", "QTOpenGLVS", 0));
    pushButton->setText(QApplication::translate("QTOpenGLVSClass", "Quit", 0));
} // retranslateUi

};

namespace Ui {
   class QTOpenGLVSClass: public Ui_QTOpenGLVSClass {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_QTOPENGLVS_H

SGaist

Hi and welcome to devnet,

Before going further, are you aware that you are not using the correct base class for your OpenGL widget ?

taulant01

Hi @SGaist,

I was researching about my problem and started to understand how to it works with the base class and the other stuff. I fixed these errors, but now I am having other errors.

when I add these functions to a class header (which the Widget is promoted to that class): paintGL() and resizeGL(int w, int h); I am getting these errors:

error LNK2001: unresolved external symbol "public: virtual void __cdecl taliWidget::paintGL(void)" (?paintGL@taliWidget@@UEAAXXZ)

error LNK2001: unresolved external symbol "public: virtual void __cdecl taliWidget::resizeGL(int,int)" (?resizeGL@taliWidget@@UEAAXHH@Z)

If I remove the functions there and execute the code, then it goes almost until the end and it doesn't open em the windows but it says this in the logs:

'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\ntdll.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\kernel32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\KernelBase.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Qt\5.5\msvc2013_64\bin\Qt5Cored.dll'. Symbols loaded.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\user32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\gdi32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\lpk.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\usp10.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\msvcrt.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\shell32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\shlwapi.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\ole32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\rpcrt4.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\advapi32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\sechost.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\ws2_32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\nsi.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\mpr.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\msvcp120d.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\msvcr120d.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Qt\5.5\msvc2013_64\bin\Qt5Widgetsd.dll'. Symbols loaded.
'testClasa2.exe' (Win32): Loaded 'C:\Qt\5.5\msvc2013_64\bin\Qt5Guid.dll'. Symbols loaded.
'testClasa2.exe' (Win32): Loaded 'C:\Qt\5.5\msvc2013_64\bin\Qt5OpenGL.dll'. Module was built without symbols.
'testClasa2.exe' (Win32): Loaded 'C:\Qt\5.5\msvc2013_64\bin\Qt5Widgets.dll'. Module was built without symbols.
'testClasa2.exe' (Win32): Loaded 'C:\Qt\5.5\msvc2013_64\bin\Qt5Gui.dll'. Module was built without symbols.
'testClasa2.exe' (Win32): Loaded 'C:\Qt\5.5\msvc2013_64\bin\Qt5Core.dll'. Module was built without symbols.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\msvcp120.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\msvcr120.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\imm32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\msctf.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\cryptbase.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Qt\5.5\msvc2013_64\plugins\platforms\qwindowsd.dll'. Symbols loaded.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\winmm.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\oleaut32.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\uxtheme.dll'. Cannot find or open the PDB file.
'testClasa2.exe' (Win32): Loaded 'C:\Windows\System32\dwmapi.dll'. Cannot find or open the PDB file.
QWidget: Must construct a QApplication before a QWidget
The program '[8820] testClasa2.exe' has exited with code 1 (0x1).

Do you have any idea what's going on? I will Edit my post and add the new code if you want?

SGaist

It's because you don't implement them. Also note that these function are valid only for QGLWidget and QOpenGLWidget.
Do you have a QApplication instantiated in your main function ?