Qt Reference Documentation

mainwindow.cpp Example File

widgets/orientation/mainwindow.cpp
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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);
 }