Reputation: 37

no appropriate default constructor available but constructor is declared

I wanted to create a window from a mainwindow, and send it a pointer to my main window. I did it one time, and i would do it again, but the second time, I always have this error at compilation "no appropriate default constructor available"

The main window:

#include "costsimulator.h"
#include "ui_costsimulator.h"

#include "stonepricewindow.h"

CostSimulator::CostSimulator(AionEnhancingSimulator *parent) : ui(new Ui::CostSimulator)
{
ui->setupUi(this);

parentPtr = parent;
stonePrice = createStonePrice();
connect(ui->aionEnhancingSimulator, SIGNAL(clicked()), this, SLOT(showAionEnhancingSimulatorWindow()));
connect(ui->stonePriceButton, SIGNAL(clicked()), this, SLOT(showStonePriceWindow()));
}

CostSimulator::~CostSimulator()
{
delete ui;
}

void CostSimulator::showAionEnhancingSimulatorWindow()
{
this->hide();
parentPtr->show();
}

QStringList *createStonePrice()
{
QStringList *tmp = new QStringList();

tmp->push_back(QString("80-30000000"));
return (tmp);
}

void CostSimulator::showStonePriceWindow()
{
StonePriceWindow *stonepricewindow = new StonePriceWindow(this);
stonepricewindow->show();
}

QStringList *CostSimulator::getStonePrice()
{
return (stonePrice);
}

and the header:

#ifndef COSTSIMULATOR_H
#define COSTSIMULATOR_H

#include <QDialog>

#include "aionenhancingsimulator.h"

namespace Ui {
class CostSimulator;
}

class CostSimulator : public QDialog
{
Q_OBJECT

public:
AionEnhancingSimulator *parentPtr;
explicit CostSimulator(AionEnhancingSimulator *parent);
~CostSimulator();

QStringList *stonePrice;

QStringList *createStonePrice();
QStringList *getStonePrice();
void showStonePriceWindow();

public slots:
void showAionEnhancingSimulatorWindow();

private:
Ui::CostSimulator *ui;
};

#endif // COSTSIMULATOR_H

and the window that cause the problem:

#include "stonepricewindow.h"
#include "ui_stonepricewindow.h"
#include <QStringListModel>
#include <QStandardItemModel>
#include <QtGui>

StonePriceWindow::StonePriceWindow(CostSimulator *parent) : ui(new Ui::StonePriceWindow)
{
ui->setupUi(this);
displayStonePriceList(parent);
}

StonePriceWindow::~StonePriceWindow()
{
delete ui;
}

void StonePriceWindow::displayStonePriceList(CostSimulator *parent)
{
// To do
}

the header

#ifndef STONEPRICEWINDOW_H
#define STONEPRICEWINDOW_H

#include <QDialog>

#include "costsimulator.h"

namespace Ui {
class StonePriceWindow;
}

class StonePriceWindow : public QDialog
{
Q_OBJECT

public:
explicit StonePriceWindow(CostSimulator *parent = 0);
~StonePriceWindow();

void displayStonePriceList(CostSimulator *parent);

private:
Ui::StonePriceWindow *ui;
};

#endif // STONEPRICEWINDOW_H

if I had this " StonePriceWindow() {}" to the header of StonePriceWindow, I have the following error: "multiple default constructors specified" and always the "no appropriate etc .."

Thanks for any help, I can't understand why.

Upvotes: 0

Answers (5)

whatever

Reputation: 11

The solution is to change the strings

#ifndef COSTSIMULATOR_H
#define COSTSIMULATOR_H

in either of the files costsimulator.h and ui_costsimulator.h

Qt places the same #ifndef #define expression in auto generated ui_costsimulator.h

Upvotes: 0

dutchdukes

Reputation: 395

Sorry, but I could not add a comment on the best answer..

I had a similar problem too, it appeared that there was a mismatch between the classname of the code I created and the dialogs' objectName property value in the Qt .ui file.

I opened the .ui file in QtDesigner, and changed the objectName property value to the classname I had used in my code. Afterwards compilation was going fine.

Upvotes: 1

MrBlue

Reputation: 37

I found the problem. In the StonePrinceWindow.ui, there was an obsolete name of the UI, so the auto-generated ui_stonepricewindow keep the obsolete name (even after a clean) and the compiler never find the ctor.

Upvotes: 0