DialogBox.show() issue in MainWindow [SOLVED]

vezprog

Right now before I fully start designing my application, I would like to make sure I am able to open a new form from my main for, and pass variables between the two. As a start, I figured I would try to at least make a widget (button) that I can click and a new form will appear.

I have a couple questions before my I post my code (very basic). If I execute a QDialog but, will my main window functions still run in the background? 2nd, can I still use a .ui file for the designer and create my dialog box that way instead of hard coding dimensions and what not?

Now on that now, here is the code I am trying to implement.

dialogtest.h
@

#ifndef DIALOGTEST_H
#define DIALOGTEST_H

#include <QDialog>
#include "mainwindow.h"

namespace Ui {
class dialogtest;
}

class dialogtest : public QDialog
{
Q_OBJECT

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

private:
Ui::dialogtest *ui;
};

#endif // DIALOGTEST_H
@

mainwindow.h
@
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <dialogtest.h>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
Q_OBJECT

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

private:
Ui::MainWindow *ui;

public slots:
void openDialog();
};

#endif // MAINWINDOW_H
@

dialogtest.cpp
@
#include "dialogtest.h"
#include "ui_dialogtest.h"
#include "mainwindow.h"

dialogtest::dialogtest(QWidget *parent) :
QDialog(parent),
ui(new Ui::dialogtest)
{
ui->setupUi(this);
}

dialogtest::~dialogtest()
{
delete ui;
}
@

mainwindow.cpp
@
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "dialogtest.h"
#include <QDialog>

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);

connect(ui->btopen, SIGNAL(clicked()), this, SLOT(openDialog()));

}

void MainWindow::openDialog()
{
dialogtest.exec();
}

MainWindow::~MainWindow()
{
delete ui;
}
@

main.cpp
@

#include <QtGui/QApplication>
#include "mainwindow.h"
#include "dialogtest.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();

return a.exec(&#41;;

}
@

I am very new to Qt and am trying to learn on my own through tutorials so bare with me here. This is the error that flags:
mainwindow.cpp:18: error: expected unqualified-id before ‘.’ token

I guess my issue is linking the two forms together. My overall goal is to pass variable values between the two forms, but I figured I would start here. It might just be as simple as using global variables as in C++ using extern, but I will look into that after this issue is solved.

Thank you in advance!

Eddy

In you opendialog slot you have to make an instance of dialogTest first. Your program is complaining it doesn't know the identifier before the .

Then use show()

vezprog

since I have the .ui file made, and the class for it, I thought it would be all set. Do you mean in my main function in mainwindow.cpp I have to add an initialization for it? Could you elaborate a little bit please.

Thank you again for the quick reply.

Eddy

Try this :

@void MainWindow::openDialog()
{
Dialogtest dia;
dia.show();
}@

vezprog

For some reason .show() does not activate the window. exec() does though. Not really sure about the difference, but either way, problem solved. Thank you!

mlong

I don't think won't work, as Dialogtest is created on the stack and will fall out of scope as openDialog() exits, since show() doesn't block.

Edit: Or will it?

Eddy

Sorry, my mistake. I didn't test it first. If you use show, you should use setModal first.

"Here is the full explanation.":http://developer.qt.nokia.com/doc/qt-4.7/qdialog.html#id-8f49114e-2fb8-4525-8a9d-af84f69df7e6