no appropriate default constructor available

[yazan]

hi all,
i'm trying to compile my project, that i have made under linux, in windows
graphForm::graphForm(QWidget *parent) :
QMdiSubWindow(parent),
ui(new Ui::graphForm)
in the code with red color i get the following error, although i have no problems in liunx

Fehler:C2512: 'Ui::graphForm' : no appropriate default constructor available
does onybody know what could that be

any help will be apreciated

[wysota]

Did uic create the Ui::graphForm class for you?

[yazan]

yes it is created with qt creator

[stampede]

I think wysota meant the automatically generated class code, created by uic from the form .ui file ( form.ui should give you ui_form.h ).

[yazan]

yes it does.
i have forgetten to say that i'm trying to compile a project under windows, witch was developed under linux, under linux there is no problems.

[stampede]

Can you post the content of this header ?

[yazan]

#include "graphform.h"
#include "ui_graphform.h"
#include "messwertemodel.h"
#include <qwt_plot_curve.h>
#include <qwt_symbol.h>
#include <QDebug>
#include <qwt_plot_grid.h>
#include <QStyledItemDelegate>


graphForm::graphForm(QWidget *parent) :
QMdiSubWindow(parent), ui(new Ui::graphForm)
{
ui->setupUi(this);
this->model=new messwerteModel();
this->ui->messwerteTableView->setModel(this->model);
this->ui->messwertQwtPlot->axisAutoScale(false);
}

[stampede]

I've meant the automatically generated header: "ui_graphform.h"

[yazan]

hear it is

/************************************************** ******************************
** Form generated from reading UI file 'graphform.ui'
**
** Created:
** by: Qt User Interface Compiler version 4.7.2
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
************************************************** ******************************/

#ifndef UI_GRAPHFORM_H
#define UI_GRAPHFORM_H

#include <QtCore/QVariant>
#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QButtonGroup>
#include <QtGui/QFrame>
#include <QtGui/QGridLayout>
#include <QtGui/QHBoxLayout>
#include <QtGui/QHeaderView>
#include <QtGui/QLabel>
#include <QtGui/QLineEdit>
#include <QtGui/QPushButton>
#include <QtGui/QRadioButton>
#include <QtGui/QScrollArea>
#include <QtGui/QTabWidget>
#include <QtGui/QTableView>
#include <QtGui/QWidget>
#include "qwt_plot.h"
#include "qwt_text_label.h"

QT_BEGIN_NAMESPACE

class Ui_graphForm
{
public:




QwtPlot *messwertQwtPlot;

void setupUi(QWidget *graphForm)
{
if (graphForm->objectName().isEmpty())
graphForm->setObjectName(QString::fromUtf8("graphForm"));
graphForm->resize(842, 602);
QIcon icon;
icon.addFile(QString::fromUtf8("icons/newGraph.png"), QSize(), QIcon::Normal, QIcon::Off);
graphForm->setWindowIcon(icon);
horizontalLayoutWidget = new QWidget(graphForm);
horizontalLayoutWidget->setObjectName(QString::fromUtf8("horizontalLayoutWidget"));
horizontalLayoutWidget->setGeometry(QRect(10, 30, 831, 321));
horizontalLayout = new QHBoxLayout(horizontalLayoutWidget);
horizontalLayout->setObjectName(QString::fromUtf8("horizontalLayout"));
horizontalLayout->setContentsMargins(0, 0, 0, 0);
tabWidget_2 = new QTabWidget(graphForm);
tabWidget_2->setObjectName(QString::fromUtf8("tabWidget_2"));
tabWidget_2->setGeometry(QRect(4, 350, 791, 251));
tab_3 = new QWidget();
tab_3->setObjectName(QString::fromUtf8("tab_3"));
scrollArea = new QScrollArea(tab_3);
scrollArea->setObjectName(QString::fromUtf8("scrollArea"));
scrollArea->setGeometry(QRect(0, 10, 631, 214));
scrollArea->setWidgetResizable(true);
scrollAreaWidgetContents = new QWidget();
scrollAreaWidgetContents->setObjectName(QString::fromUtf8("scrollAreaWidgetContents"));
scrollAreaWidgetContents->setGeometry(QRect(0, 0, 627, 210));
gridLayout = new QGridLayout(scrollAreaWidgetContents);
gridLayout->setObjectName(QString::fromUtf8("gridLayout"));
messwerteTableView = new QTableView(scrollAreaWidgetContents);
messwerteTableView->setObjectName(QString::fromUtf8("messwerteTableView"));
messwerteTableView->setMouseTracking(true);

gridLayout->addWidget(messwerteTableView, 0, 1, 1, 1);

scrollArea->setWidget(scrollAreaWidgetContents);
addMesswertButton = new QPushButton(tab_3);
addMesswertButton->setObjectName(QString::fromUtf8("addMesswertButton"));
addMesswertButton->setGeometry(QRect(680, 10, 41, 27));
QIcon icon1;
icon1.addFile(QString::fromUtf8("icons/plus.png"), QSize(), QIcon::Normal, QIcon::Off);
addMesswertButton->setIcon(icon1);
deleteMesswertButton = new QPushButton(tab_3);
deleteMesswertButton->setObjectName(QString::fromUtf8("deleteMesswertButton"));
deleteMesswertButton->setGeometry(QRect(680, 46, 41, 27));
QIcon icon2;
icon2.addFile(QString::fromUtf8("icons/minus.png"), QSize(), QIcon::Normal, QIcon::Off);
deleteMesswertButton->setIcon(icon2);
linearFrame->setFrameShadow(QFrame::Raised);

aValEdit->setObjectName(QString::fromUtf8("aValEdit"));
aValEdit->setGeometry(QRect(24, 3, 41, 25));
bVarLbl = new QLabel(linearFrame);
bVarLbl->setObjectName(QString::fromUtf8("bVarLbl"));
bVarLbl->setGeometry(QRect(78, 3, 16, 17));


line->setAutoFillBackground(false);
line->setFrameShadow(QFrame::Raised);
line->setLineWidth(8);
pbtnPrint->setIcon(icon3);
pbtnPrint->setIconSize(QSize(32, 32));
pbtnExport = new QPushButton(graphForm);
pbtnExport->setObjectName(QString::fromUtf8("pbtnExport"));
pbtnExport->setGeometry(QRect(806, 500, 30, 31));
QIcon icon4;
icon4.addFile(QString::fromUtf8("icons/pdf.png"), QSize(), QIcon::Normal, QIcon::Off);
pbtnExport->setIcon(icon4);
pbtnExport->setIconSize(QSize(24, 24));
messwertQwtPlot = new QwtPlot(graphForm);
messwertQwtPlot->setObjectName(QString::fromUtf8("messwertQwtPlot"));
messwertQwtPlot->setGeometry(QRect(8, 30, 821, 319));
QWidget::setTabOrder(lineareFunkRadio, aValEdit);
QWidget::setTabOrder(aValEdit, bValEdit);
QWidget::setTabOrder(bValEdit, logFunkRadio);
QWidget::setTabOrder(logFunkRadio, logVarEdit);
QWidget::setTabOrder(logVarEdit, exponentialFunkRadio);
QWidget::setTabOrder(exponentialFunkRadio, exponentialVarEdit);
QWidget::setTabOrder(exponentialVarEdit, sinusFunkRadio);
QWidget::setTabOrder(sinusFunkRadio, sinusAVarEdit);
QWidget::setTabOrder(sinusAVarEdit, quadratischFunkRadio);
QWidget::setTabOrder(quadratischFunkRadio, quadratischVarEdit);
QWidget::setTabOrder(quadratischVarEdit, clearAllButton);
QWidget::setTabOrder(clearAllButton, scrollArea);
QWidget::setTabOrder(scrollArea, drowTXButton);
QWidget::setTabOrder(drowTXButton, drowTYButton);
QWidget::setTabOrder(drowTYButton, drowTYXButton);
QWidget::setTabOrder(drowTYXButton, drowTXYButton);
QWidget::setTabOrder(drowTXYButton, addMesswertButton);
QWidget::setTabOrder(addMesswertButton, deleteMesswertButton);
QWidget::setTabOrder(deleteMesswertButton, messwerteTableView);
QWidget::setTabOrder(messwerteTableView, konstanteFunButton);
QWidget::setTabOrder(konstanteFunButton, ausgleichFunButton);
QWidget::setTabOrder(ausgleichFunButton, tabWidget_2);

retranslateUi(graphForm);
QObject::connect(ausgleichFunButton, SIGNAL(clicked()), graphForm, SLOT(ausgleischFun()));
QObject::connect(exponentialVarEdit, SIGNAL(editingFinished()), graphForm, SLOT(exponentialeFun()));
QObject::connect(konstanteFunButton, SIGNAL(clicked()), graphForm, SLOT(konstanteFun()));
QObject::connect(bValEdit, SIGNAL(editingFinished()), graphForm, SLOT(lineareFun()));
QObject::connect(logVarEdit, SIGNAL(editingFinished()), graphForm, SLOT(logFun()));
QObject::connect(sinusAVarEdit, SIGNAL(editingFinished()), graphForm, SLOT(sinusFun()));
QObject::connect(clearAllButton, SIGNAL(clicked()), graphForm, SLOT(clearAll()));
QObject::connect(graphForm, SIGNAL(destroyed()), graphForm, SLOT(formDestroyed()));
QObject::connect(addMesswertButton, SIGNAL(clicked()), graphForm, SLOT(addMesswert()));
QObject::connect(deleteMesswertButton, SIGNAL(clicked()), graphForm, SLOT(deleteMesswert()));
QObject::connect(drowTXButton, SIGNAL(clicked()), graphForm, SLOT(drowTX()));
QObject::connect(drowTYXButton, SIGNAL(clicked()), graphForm, SLOT(drowTYX()));
QObject::connect(drowTYButton, SIGNAL(clicked()), graphForm, SLOT(drowTY()));
QObject::connect(lineareFunkRadio, SIGNAL(clicked()), graphForm, SLOT(linearVarvisible()));
QObject::connect(logFunkRadio, SIGNAL(clicked()), graphForm, SLOT(logVarVisible()));
QObject::connect(exponentialFunkRadio, SIGNAL(clicked()), graphForm, SLOT(exponetialVarVisible()));
QObject::connect(sinusFunkRadio, SIGNAL(clicked()), graphForm, SLOT(sinusVarVisible()));
QObject::connect(quadratischFunkRadio, SIGNAL(clicked()), graphForm, SLOT(quadratischeVarvisible()));
QObject::connect(pbtnPrint, SIGNAL(clicked()), graphForm, SLOT(print()));
QObject::connect(pbtnExport, SIGNAL(clicked()), graphForm, SLOT(exportInPdf()));

tabWidget_2->setCurrentIndex(1);


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


};

namespace Ui {
class graphForm: public Ui_graphForm {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_GRAPHFORM_H


i have shortened the code

[wysota]

What about the part you cut out? Is there a constructor for the class?

[yazan]

no there is no constructor.
should not qt be portable. as i have seen one must change his code to get it compiled in win (in my case). i have solved another problem, witch i didn't have in linux.

[stampede]

How is the member variable ui declared ? You have some kind of forward declaration? Can you post the content of graphform.h ?

[SixDegrees]

Are you using the same version of Qt/Creator on both systems?

Are you attempting to use automatically generated files created on Linux under Windows?

Have you done a complete 'make clean' of your project and regenerated everything from scratch?

Are you sure this code compiled under Linux? 'cause it doesn't look like it should; there's no constructor corresponding to the object you're trying to construct in the initialization routine.

To answer the question you've repeated several times now: yes, Qt code is, for the most part, portable without change between Linux and Windows. The only exceptions are sections of code that are clearly platform-dependent such as calls to Windows or Linux OS routines or similar resources. I've ported several large programs between the two systems and have never once had to rewrite code.

[stampede]

But I think there is a default, auto-generated no-argument constructor like for any other C++ class without other constructors, so new Ui::graphForm should be ok.
I agree with SixDegrees, you should rebuild everything from scratch.