dialog.cpp Example File

  /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, 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 The Qt Company Ltd 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 <QtWidgets>

  #include "dialog.h"

  Dialog::Dialog()
  {
      desktopGeometry = QApplication::desktop()->availableGeometry(0);

      setWindowTitle(tr("SIP Dialog Example"));
      QScrollArea *scrollArea = new QScrollArea(this);
      QGroupBox *groupBox = new QGroupBox(scrollArea);
      groupBox->setTitle(tr("SIP Dialog Example"));
      QGridLayout *gridLayout = new QGridLayout(groupBox);
      groupBox->setLayout(gridLayout);

      QLineEdit* lineEdit = new QLineEdit(groupBox);
      lineEdit->setText(tr("Open and close the SIP"));
      lineEdit->setMinimumWidth(220);

      QLabel* label = new QLabel(groupBox);
      label->setText(tr("This dialog resizes if the SIP is opened"));
      label->setMinimumWidth(220);

      QPushButton* button = new QPushButton(groupBox);
      button->setText(tr("Close Dialog"));
      button->setMinimumWidth(220);

      if (desktopGeometry.height() < 400)
          gridLayout->setVerticalSpacing(80);
      else
          gridLayout->setVerticalSpacing(150);

      gridLayout->addWidget(label);
      gridLayout->addWidget(lineEdit);
      gridLayout->addWidget(button);

      scrollArea->setWidget(groupBox);
      QHBoxLayout* layout = new QHBoxLayout();
      layout->addWidget(scrollArea);
      setLayout(layout);
      scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

      connect(button, &QAbstractButton::clicked, qApp, &QApplication::closeAllWindows);
      connect(QApplication::desktop(), &QDesktopWidget::workAreaResized,
          this, &Dialog::desktopResized);
  }

  void Dialog::desktopResized(int screen)
  {
      if (screen != 0)
          return;
      reactToSIP();
  }

  void Dialog::reactToSIP()
  {
      QRect availableGeometry = QApplication::desktop()->availableGeometry(0);

      if (desktopGeometry != availableGeometry) {
          if (windowState() | Qt::WindowMaximized)
              setWindowState(windowState() & ~Qt::WindowMaximized);

          setGeometry(availableGeometry);
      }

      desktopGeometry = availableGeometry;
  }