Qt Reference Documentation

# dialog.cpp Example File

layouts/basiclayouts/dialog.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
     **     the names of its contributors may be used to endorse or promote
     **     products derived from this software without specific prior written
     **     permission.
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include <QtGui>

     #include "dialog.h"

     Dialog::Dialog()
     {
         createMenu();
         createHorizontalGroupBox();
         createGridGroupBox();
         createFormGroupBox();

         bigEditor = new QTextEdit;
         bigEditor->setPlainText(tr("This widget takes up all the remaining space "
                                    "in the top-level layout."));

         buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok
                                          | QDialogButtonBox::Cancel);

         connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
         connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

         QVBoxLayout *mainLayout = new QVBoxLayout;
         mainLayout->setMenuBar(menuBar);
         mainLayout->addWidget(horizontalGroupBox);
         mainLayout->addWidget(gridGroupBox);
         mainLayout->addWidget(formGroupBox);
         mainLayout->addWidget(bigEditor);
         mainLayout->addWidget(buttonBox);
         setLayout(mainLayout);

         setWindowTitle(tr("Basic Layouts"));
     }

     void Dialog::createMenu()
     {
         menuBar = new QMenuBar;

         fileMenu = new QMenu(tr("&File"), this);
         exitAction = fileMenu->addAction(tr("E&xit"));
         menuBar->addMenu(fileMenu);

         connect(exitAction, SIGNAL(triggered()), this, SLOT(accept()));
     }

     void Dialog::createHorizontalGroupBox()
     {
         horizontalGroupBox = new QGroupBox(tr("Horizontal layout"));
         QHBoxLayout *layout = new QHBoxLayout;

         for (int i = 0; i < NumButtons; ++i) {
             buttons[i] = new QPushButton(tr("Button %1").arg(i + 1));
             layout->addWidget(buttons[i]);
         }
         horizontalGroupBox->setLayout(layout);
     }

     void Dialog::createGridGroupBox()
     {
         gridGroupBox = new QGroupBox(tr("Grid layout"));
         QGridLayout *layout = new QGridLayout;

         for (int i = 0; i < NumGridRows; ++i) {
             labels[i] = new QLabel(tr("Line %1:").arg(i + 1));
             lineEdits[i] = new QLineEdit;
             layout->addWidget(labels[i], i + 1, 0);
             layout->addWidget(lineEdits[i], i + 1, 1);
         }

         smallEditor = new QTextEdit;
         smallEditor->setPlainText(tr("This widget takes up about two thirds of the "
                                      "grid layout."));
         layout->addWidget(smallEditor, 0, 2, 4, 1);

         layout->setColumnStretch(1, 10);
         layout->setColumnStretch(2, 20);
         gridGroupBox->setLayout(layout);
     }

     void Dialog::createFormGroupBox()
     {
         formGroupBox = new QGroupBox(tr("Form layout"));
         QFormLayout *layout = new QFormLayout;
         layout->addRow(new QLabel(tr("Line 1:")), new QLineEdit);
         layout->addRow(new QLabel(tr("Line 2, long text:")), new QComboBox);
         layout->addRow(new QLabel(tr("Line 3:")), new QSpinBox);
         formGroupBox->setLayout(layout);
     }