Getting a QDialog to show up with show or exec functions

Question

Right now the QDialog I created is not showing up. Is there any way you can help me find the error?

My main.cpp

#include <QApplication>
#include "numplayers.h"
#include "playerinfo.h"
#include "mainwindow.h"

int main( int argv, char* argc[] ) {
    int numberPlayers;
  QApplication app( argv, argc );
  MainWindow mw;
  numPlayers pPlayers;
   playerInfo pInfo;
  if (pPlayers.exec())
  {
    numberPlayers = pPlayers.returnInput();
  }

  for (int i = 0; i < numberPlayers; i++)
  {
    if(pInfo.exec())
    {
      int index = pInfo.getIndex();
      QString name = pInfo.getName();
          // do something with these..
      mw.setPlayerData(index, name, i);
    }
  }
  mw.setGUIWidgets(numberPlayers);
  mw.createCentralWidget();
  mw.show();

  return app.exec();
}

playerInfo Dialog: (the one I am having trouble to get show up)

#include "playerinfo.h"
#include <QDialogButtonBox>
#include <QLayout>
#include <QComboBox>
#include <QLineEdit>


playerInfo::playerInfo(QWidget *parent) :
    QDialog(parent)
{
    QVBoxLayout *layout = new QVBoxLayout;
    this->setLayout(layout);

    lineEdit = new QLineEdit; // create line edit
    layout->addWidget(lineEdit);

    comboBox = new QComboBox; // create combo box and add items to it
    QStringList items = QStringList() << "Hat" << "Car" << "Shoe" << "SpaceShip" << "Basketball" << "Ring";
    comboBox->addItems(items);
    layout->addWidget(comboBox);



    // create button box
    QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
    layout->addWidget(buttonBox);
}

QString playerInfo::getName() const
{
    return lineEdit->text();
}

int playerInfo::getIndex() const
{
    return comboBox->currentIndex();
}

if there is any more information I can provide that could help with the debugging process please let me know. Thank you for all the help.

I read some other examples that used show() instead of exec(). Is there a difference? Right now after the numberPlayers dialog is entered none of the lineedits and comboboxes show up in the dialog.

Edit:

playerInfo.h

#ifndef PLAYERINFO_H
#define PLAYERINFO_H
#include <QDialogButtonBox>
#include <QLayout>
#include <QComboBox>
#include <QLineEdit>
#include <QDialog>
#include <QWidget>

class QLineEdit;
class QComboBox;

class playerInfo : public QDialog
{
    Q_OBJECT
public:
    explicit playerInfo(QWidget *parent = 0);
    QString getName() const;
    int getIndex() const;

private:
    int max_players;
    QVBoxLayout *layout ;
    QDialogButtonBox *buttonBox;
    QComboBox *comboBox;
    QLineEdit *lineEdit;
};

#endif // MYDIALOG_H

hi, show() open the dialog as non modal and return immediatly, exec() open the dialog as modal and wait for the returned value have you tried to display the value of numberPlayers ? qDebug() << numberPlayers; the value is good ? — Boo, Apr 30 '14 at 22:27
yes the value is good, the issue i am having is that all the widgets I created for my playerInfo dialog are not showing up — user3587954, Apr 30 '14 at 22:31
con you post your playerInfo.h please, i'm not reproduicing your issue — Boo, Apr 30 '14 at 22:51
really I don't see error, are you sure the window you see is not your mainwindow ? you should try pInfo.exec() right after declaring it to test — Boo, Apr 30 '14 at 23:07

score 0 · Answer 1 · answered May 01 '14 at 14:34

0

It worked OK for me. As you haven't posted the code of numPlayers class, I initialised int numberPlayers = 3;. playerInfo dialogue was shown thrice and then main window appeared. It looks like the window you are seeing is the main window. May be numberPlayers = pPlayers.returnInput(); returning 0. Add qDebug() << numberPlayers; to see if you are getting a positive value.

answered May 01 '14 at 14:34

ramtheconqueror

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yes the numberPlayers value I receive is a number that correlates with the users selection from the input dialog 2 - 4 people – user3587954 May 01 '14 at 18:12
the numPlayers class is just a dialog that contains a QInputDialog prompting for a user to enter a number between 2 - 4 – user3587954 May 01 '14 at 18:12

Getting a QDialog to show up with show or exec functions

1 Answers1