Qt 4.8: mainwindow.cpp Example File (widgets/orientation/mainwindow.cpp)

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# mainwindow.cpp Example File

widgets/orientation/mainwindow.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the QtCore module 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 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.
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     ** "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
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     #include "mainwindow.h"
     #include "ui_landscape.h"
     #include "ui_portrait.h"

     #include <QDesktopWidget>
     #include <QResizeEvent>

     MainWindow::MainWindow(QWidget *parent) :
             QWidget(parent),
             landscapeWidget(0),
             portraitWidget(0)
     {
         landscapeWidget = new QWidget(this);
         landscape.setupUi(landscapeWidget);

         portraitWidget = new QWidget(this);
         portrait.setupUi(portraitWidget);

         connect(portrait.exitButton, SIGNAL(clicked()), this, SLOT(close()));
         connect(landscape.exitButton, SIGNAL(clicked()), this, SLOT(close()));
         connect(landscape.buttonGroup, SIGNAL(buttonClicked(QAbstractButton*)),
                 this, SLOT(onRadioButtonClicked(QAbstractButton*)));

         landscape.radioAButton->setChecked(true);
         onRadioButtonClicked(landscape.radioAButton);

     #ifdef Q_WS_MAEMO_5
         setAttribute(Qt::WA_Maemo5AutoOrientation, true);
     #endif
     }

     void MainWindow::resizeEvent(QResizeEvent *event)
     {
         QSize size = event->size();
         bool isLandscape = size.width() > size.height();

         if (!isLandscape)
             size.transpose();

         landscapeWidget->setFixedSize(size);
         size.transpose();
         portraitWidget->setFixedSize(size);

         landscapeWidget->setVisible(isLandscape);
         portraitWidget->setVisible(!isLandscape);
     }

     void MainWindow::onRadioButtonClicked(QAbstractButton *button)
     {
         QString styleTemplate = "background-image: url(:/image_%1.png);"
                                 "background-repeat: no-repeat;"
                                 "background-position: center center";

         QString imageStyle("");
         if (button == landscape.radioAButton)
             imageStyle = styleTemplate.arg("a");
         else if (button == landscape.radioBButton)
             imageStyle = styleTemplate.arg("b");
         else if (button == landscape.radioCButton)
             imageStyle = styleTemplate.arg("c");

         portrait.choiceWidget->setStyleSheet(imageStyle);
         landscape.choiceWidget->setStyleSheet(imageStyle);
     }