Stuck in this Error :::invalid use of incomplete type ‘class Ui::Dialog’ ui(new Ui::Dialog) ^~~~~~

[sankarapandiyan]

dialog.cpp

#include "dialog.h"
#include "ui_dialog.h"
#include <QProgressDialog>
#include <QDebug>
Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
}
Dialog::~Dialog()
{
    delete ui;
}
void Dialog::on_modalButton_clicked()
{
    int numTasks = 100000;
    QProgressDialog progress("Task in progress...", "Cancel", 0, numTasks, this);
    progress.setWindowModality(Qt::WindowModal);
    for (int i = 0; i < numTasks; i++) {
        progress.setValue(i);
       if (progress.wasCanceled())
            break;
    }
    progress.setValue(numTasks);
}
void Dialog::on_modelessButton_clicked()
{
    myTask = new MyTask;
}

[Christian Ehrlicher]

So how did you name you widget in the designer? Looking into ui_dialog.h will show you that it's at least not 'Dialog'

[jsulm]

@sankarapandiyan Do you use qmake?
Did you check whether ui_dialog.h contains Dialog class inside Ui namespace?

[J.Hilk]

@sankarapandiyan nobody will be able to find the error here, show us your header file

also pls use the code tag to display code:

[sankarapandiyan]

@Christian-Ehrlicher in designer i have used only Dialog , then why its shows the error , please give some suggestion to fix this error

[sankarapandiyan]

@J-Hilk YEs i have done it .please give me some suggestion about the error

[jsulm]

@sankarapandiyan He asked you to post the code...

[sankarapandiyan]

@jsulm sure check it

[sankarapandiyan]

@J-Hilk I have done it

[jsulm]

@sankarapandiyan said in Stuck in this Error :::invalid use of incomplete type ‘class Ui::Dialog’ ui(new Ui::Dialog) ^~~~~~:

I have done it

Where? I can't see the code from your header files anywhere...

[sankarapandiyan]

@jsulm i have done

[jsulm]

@sankarapandiyan Sorry, but I can't see it anywhere...

[J.Hilk]

@sankarapandiyan neither can I

[mrjj]

Hi
Please also show

dialog.h

and most important

ui_dialog.h

[sankarapandiyan]

@mrjj

``

i have included #include <ui_dialog.h> in dialog.h 



#ifndef DIALOG_H
#define DIALOG_H


#include <QDialog>
#include "mytask.h"
#include <ui_dialog.h>
namespace Ui {
class Dialog;
}
 but the error remains the same   /home/adx-soft1/Desktop/Sankarapandiyan/ProgDial/dialog.cpp:10: error: invalid use of incomplete type ‘class Ui::Dialog’
     ui(new Ui::Dialog)
                ^~~~~~



this is my dialog.h 


#ifndef DIALOG_H
#define DIALOG_H


#include <QDialog>
#include "mytask.h"
#include <ui_dialog.h>



namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog(QWidget *parent = 0);
    ~Dialog();

private slots:
    void on_modalButton_clicked();

    void on_modelessButton_clicked();

private:
    Ui::Dialog *ui;
    MyTask *myTask;
};

#endif // DIALOG_H

[jsulm]

@sankarapandiyan Can you please simply provide the content of ui_dialog.h? This is what we are asking all the time.

[sankarapandiyan]

@jsulm [url=https://postimg.cc/tZyZdZ4R][img]https://i.postimg.cc/tZyZdZ4R/Screenshot-from-2019-10-31-13-33-16.png[/img][/url]

[url=https://postimg.cc/rd5RtCcY][img]https://i.postimg.cc/rd5RtCcY/Screenshot-from-2019-10-31-13-33-28.png[/img][/url]

[jsulm]

@sankarapandiyan This is not what we asked you to provide!
AGAIN: post the content of ui_dialog.h ! It is a normal C++ header file, so symply copy its text and post it here directly...

[sankarapandiyan]

@jsulm ```
code_text

#define DIALOG_H

#include <QDialog>
#include<QTimer>
#include<QProgressDialog>

namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog(QWidget *parent = nullptr);
    ~Dialog();
public slots:
    void myfunction();
    void perform();
    void cancel();

private:
    Ui::Dialog *ui;
    int steps;
    QProgressDialog*pd;
    QTimer*timer;
};

#endif // DIALOG_H
This is the hedder file of dialog.h

[jsulm]

@sankarapandiyan Sorry I will stop here as I'm tired to explain that you simply need to copy text from ui_dialog.h and paste it here...