Qt 4.8: softkeys.cpp Example File (widgets/softkeys/softkeys.cpp)

Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# softkeys.cpp Example File

widgets/softkeys/softkeys.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** 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 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 "softkeys.h"

     MainWindow::MainWindow(QWidget *parent)
         : QMainWindow(parent)
     {
         central = new QWidget(this);
         central->setContextMenuPolicy(Qt::NoContextMenu); // explicitly forbid usage of context menu so actions item is not shown menu
         setCentralWidget(central);

         // Create text editor and set softkeys to it
         textEditor= new QTextEdit(tr("Navigate in UI to see context sensitive softkeys in action"), this);
         QAction* clear = new QAction(tr("Clear"), this);
         clear->setSoftKeyRole(QAction::NegativeSoftKey);

         textEditor->addAction(clear);

         ok = new QAction(tr("Ok"), this);
         ok->setSoftKeyRole(QAction::PositiveSoftKey);
         connect(ok, SIGNAL(triggered()), this, SLOT(okPressed()));

         cancel = new QAction(tr("Cancel"), this);
         cancel->setSoftKeyRole(QAction::NegativeSoftKey);
         connect(cancel, SIGNAL(triggered()), this, SLOT(cancelPressed()));

         infoLabel = new QLabel(tr(""), this);
         infoLabel->setContextMenuPolicy(Qt::NoContextMenu);

         toggleButton = new QPushButton(tr("Custom"), this);
         toggleButton->setContextMenuPolicy(Qt::NoContextMenu);
         toggleButton->setCheckable(true);

         modeButton = new QPushButton(tr("Loop SK window type"), this);
         modeButton->setContextMenuPolicy(Qt::NoContextMenu);

         modeLabel = new QLabel(tr("Normal maximized"), this);
         modeLabel->setContextMenuPolicy(Qt::NoContextMenu);

         pushButton = new QPushButton(tr("File Dialog"), this);
         pushButton->setContextMenuPolicy(Qt::NoContextMenu);

         QComboBox* comboBox = new QComboBox(this);
         comboBox->setContextMenuPolicy(Qt::NoContextMenu);
         comboBox->insertItems(0, QStringList()
          << QApplication::translate("MainWindow", "Selection1", 0, QApplication::UnicodeUTF8)
          << QApplication::translate("MainWindow", "Selection2", 0, QApplication::UnicodeUTF8)
          << QApplication::translate("MainWindow", "Selection3", 0, QApplication::UnicodeUTF8)
         );

         layout = new QGridLayout;
         layout->addWidget(textEditor, 0, 0, 1, 2);
         layout->addWidget(infoLabel, 1, 0, 1, 2);
         layout->addWidget(toggleButton, 2, 0);
         layout->addWidget(pushButton, 2, 1);
         layout->addWidget(comboBox, 3, 0, 1, 2);
         layout->addWidget(modeButton, 4, 0, 1, 2);
         layout->addWidget(modeLabel, 5, 0, 1, 2);
         central->setLayout(layout);

         fileMenu = menuBar()->addMenu(tr("&File"));
         exit = new QAction(tr("&Exit"), this);
         fileMenu->addAction(exit);

         connect(clear, SIGNAL(triggered()), this, SLOT(clearTextEditor()));
         connect(pushButton, SIGNAL(clicked()), this, SLOT(openDialog()));
         connect(exit, SIGNAL(triggered()), this, SLOT(exitApplication()));
         connect(toggleButton, SIGNAL(clicked()), this, SLOT(setCustomSoftKeys()));
         connect(modeButton, SIGNAL(clicked()), this, SLOT(setMode()));
         pushButton->setFocus();
     }

     MainWindow::~MainWindow()
     {
     }

     void MainWindow::clearTextEditor()
     {
         textEditor->setText(tr(""));
     }

     void MainWindow::openDialog()
     {
         QFileDialog::getOpenFileName(this);
     }

     void MainWindow::addSoftKeys()
     {
         addAction(ok);
         addAction(cancel);
     }

     void MainWindow::setCustomSoftKeys()
     {
         if (toggleButton->isChecked()) {
             infoLabel->setText(tr("Custom softkeys set"));
             addSoftKeys();
             }
         else {
             infoLabel->setText(tr("Custom softkeys removed"));
             removeAction(ok);
             removeAction(cancel);
         }
     }

     void MainWindow::setMode()
     {
         if(isMaximized()) {
             showFullScreen();
             modeLabel->setText(tr("Normal Fullscreen"));
         } else {
             Qt::WindowFlags flags = windowFlags();
             if(flags & Qt::WindowSoftkeysRespondHint) {
                 flags |= Qt::WindowSoftkeysVisibleHint;
                 flags &= ~Qt::WindowSoftkeysRespondHint;
                 setWindowFlags(flags); // Hides visible window
                 showFullScreen();
                 modeLabel->setText(tr("Fullscreen with softkeys"));
             } else if(flags & Qt::WindowSoftkeysVisibleHint) {
                 flags &= ~Qt::WindowSoftkeysVisibleHint;
                 flags &= ~Qt::WindowSoftkeysRespondHint;
                 setWindowFlags(flags); // Hides visible window
                 showMaximized();
                 modeLabel->setText(tr("Normal Maximized"));
             } else {
                 flags &= ~Qt::WindowSoftkeysVisibleHint;
                 flags |= Qt::WindowSoftkeysRespondHint;
                 setWindowFlags(flags); // Hides visible window
                 showFullScreen();
                 modeLabel->setText(tr("Fullscreen with SK respond"));
             }
         }
     }

     void MainWindow::exitApplication()
     {
         qApp->exit();
     }

     void MainWindow::okPressed()
     {
         infoLabel->setText(tr("OK pressed"));
     }

     void MainWindow::cancelPressed()
     {
         infoLabel->setText(tr("Cancel pressed"));
     }