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# addbuttondialog.cpp Example File
widgets/dialogbuttonbox/addbuttondialog.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2007-2007 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 as published by the Free Software Foundation
     ** and appearing in the file LICENSE.GPL included in the packaging of
     ** this file.  Please review the following information to ensure GNU
     ** General Public Licensing requirements will be met:
     ** http://www.trolltech.com/products/qt/opensource.html
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
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     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #include <QtGui>

     #include "addbuttondialog.h"

     AddButtonDialog::AddButtonDialog(QDialogButtonBox *box, QWidget *parent)
         : QDialog(parent)
     {
         dialogBox = box;

         setupUi(this);
         fillStandardButtonCombo();
         fillCustomButtonCombo();
         standardButtonSelected(standardButtonCombo->currentText());

         connect(standardButtonCombo, SIGNAL(activated(const QString &)),
                 this, SLOT(standardButtonSelected(const QString &)));
         connect(okCancelDialogBox, SIGNAL(accepted()), this, SLOT(accept()));
         connect(okCancelDialogBox, SIGNAL(rejected()),
                 this, SLOT(reject()));
     }

     QString AddButtonDialog::roleToString(QDialogButtonBox::ButtonRole role)
     {
         switch (role) {
             case QDialogButtonBox::AcceptRole:
                 return "Accept";
             case QDialogButtonBox::RejectRole:
                 return "Reject";
             case QDialogButtonBox::DestructiveRole:
                 return "Destructive";
             case QDialogButtonBox::ActionRole:
                 return "Action";
             case QDialogButtonBox::HelpRole:
                 return "Help";
             case QDialogButtonBox::YesRole:
                 return "Yes";
             case QDialogButtonBox::NoRole:
                 return "No";
             case QDialogButtonBox::ApplyRole:
                 return "Apply";
             case QDialogButtonBox::ResetRole:
                 return "Reset";
             default:
                 return "Invalid Role";
         }
     }

     void AddButtonDialog::addButton()
     {
         QAbstractButton *addedButton = 0;

         if (tabWidget->tabText(tabWidget->currentIndex()) ==
             "Standard Button") {
             QDialogButtonBox::StandardButton standardButton =
                 QDialogButtonBox::StandardButton(
                     qVariantValue<int>(standardButtonCombo->itemData(
                         standardButtonCombo->currentIndex())));

         if (dialogBox->button(standardButton) == 0)
             addedButton = dialogBox->addButton(standardButton);
         } else {
             addedButton = new QPushButton(customButtonLineEdit->text());

             if (!contains(addedButton, dialogBox->buttons()))
                 dialogBox->addButton(addedButton, QDialogButtonBox::ButtonRole(
                     qVariantValue<int>(customButtonCombo->itemData(
                         customButtonCombo->currentIndex()))));
         }

         if (addedButton)
             addedButton->setStyle(dialogBox->style());
     }

     void AddButtonDialog::standardButtonSelected(const QString & /* text */)
     {
         int value = standardButtonCombo->itemData(
         standardButtonCombo->currentIndex()).toInt();

         QDialogButtonBox box;
         QAbstractButton *button =
         box.addButton(QDialogButtonBox::StandardButton(value));
         standardRoleLabel->setText(roleToString(box.buttonRole(button)));
         standardTextLabel->setText(button->text().remove('&'));
     }

     void AddButtonDialog::fillStandardButtonCombo()
     {
         QMetaEnum standardEnum = QDialogButtonBox::staticMetaObject.enumerator(0);
         QDialogButtonBox box;

         for (int i = 1; i < standardEnum.keyCount(); ++i) {
             QString key = standardEnum.key(i);

             QDialogButtonBox::StandardButton standardButton =
                 QDialogButtonBox::StandardButton(
                 standardEnum.keyToValue(standardEnum.key(i)));
             standardButtonCombo->addItem(
                 box.addButton(standardButton)->text().remove('&'),
                               int(standardButton));
         }
     }

     void AddButtonDialog::fillCustomButtonCombo()
     {
         customButtonCombo->addItem("Accept Role",
                                    int(QDialogButtonBox::AcceptRole));
         customButtonCombo->addItem("Reject Role",
                                    int(QDialogButtonBox::RejectRole));
         customButtonCombo->addItem("Destructive Role",
                                    int(QDialogButtonBox::DestructiveRole));
         customButtonCombo->addItem("Action Role",
                                    int(QDialogButtonBox::ActionRole));
         customButtonCombo->addItem("Help Role", int(QDialogButtonBox::HelpRole));
         customButtonCombo->addItem("Yes Role", int(QDialogButtonBox::YesRole));
         customButtonCombo->addItem("No Role", int(QDialogButtonBox::NoRole));
         customButtonCombo->addItem("Apply Role", int(QDialogButtonBox::ApplyRole));
         customButtonCombo->addItem("Reset Role", int(QDialogButtonBox::ResetRole));
     }

     bool AddButtonDialog::contains(QAbstractButton *button,
                                    QList<QAbstractButton *> buttons)
     {
         foreach (QAbstractButton *listButton, buttons) {
             if (button->text().remove('&') == listButton->text().remove('&'))
                 return true;
         }
         return false;
     }