Qt 5.9Qt WidgetsSystem Tray Icon Examplewindow.cpp Example File
Qt 5.9.0 Reference Documentation

window.cpp Example File

desktop/systray/window.cpp 

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  #include "window.h"

  #ifndef QT_NO_SYSTEMTRAYICON

  #include <QAction>
  #include <QCheckBox>
  #include <QComboBox>
  #include <QCoreApplication>
  #include <QCloseEvent>
  #include <QGroupBox>
  #include <QLabel>
  #include <QLineEdit>
  #include <QMenu>
  #include <QPushButton>
  #include <QSpinBox>
  #include <QTextEdit>
  #include <QVBoxLayout>
  #include <QMessageBox>

  Window::Window()
  {
      createIconGroupBox();
      createMessageGroupBox();

      iconLabel->setMinimumWidth(durationLabel->sizeHint().width());

      createActions();
      createTrayIcon();

      connect(showMessageButton, &QAbstractButton::clicked, this, &Window::showMessage);
      connect(showIconCheckBox, &QAbstractButton::toggled, trayIcon, &QSystemTrayIcon::setVisible);
      connect(iconComboBox, QOverload<int>::of(&QComboBox::currentIndexChanged),
              this, &Window::setIcon);
      connect(trayIcon, &QSystemTrayIcon::messageClicked, this, &Window::messageClicked);
      connect(trayIcon, &QSystemTrayIcon::activated, this, &Window::iconActivated);

      QVBoxLayout *mainLayout = new QVBoxLayout;
      mainLayout->addWidget(iconGroupBox);
      mainLayout->addWidget(messageGroupBox);
      setLayout(mainLayout);

      iconComboBox->setCurrentIndex(1);
      trayIcon->show();

      setWindowTitle(tr("Systray"));
      resize(400, 300);
  }

  void Window::setVisible(bool visible)
  {
      minimizeAction->setEnabled(visible);
      maximizeAction->setEnabled(!isMaximized());
      restoreAction->setEnabled(isMaximized() || !visible);
      QDialog::setVisible(visible);
  }

  void Window::closeEvent(QCloseEvent *event)
  {
  #ifdef Q_OS_OSX
      if (!event->spontaneous() || !isVisible()) {
          return;
      }
  #endif
      if (trayIcon->isVisible()) {
          QMessageBox::information(this, tr("Systray"),
                                   tr("The program will keep running in the "
                                      "system tray. To terminate the program, "
                                      "choose <b>Quit</b> in the context menu "
                                      "of the system tray entry."));
          hide();
          event->ignore();
      }
  }

  void Window::setIcon(int index)
  {
      QIcon icon = iconComboBox->itemIcon(index);
      trayIcon->setIcon(icon);
      setWindowIcon(icon);

      trayIcon->setToolTip(iconComboBox->itemText(index));
  }

  void Window::iconActivated(QSystemTrayIcon::ActivationReason reason)
  {
      switch (reason) {
      case QSystemTrayIcon::Trigger:
      case QSystemTrayIcon::DoubleClick:
          iconComboBox->setCurrentIndex((iconComboBox->currentIndex() + 1) % iconComboBox->count());
          break;
      case QSystemTrayIcon::MiddleClick:
          showMessage();
          break;
      default:
          ;
      }
  }

  void Window::showMessage()
  {
      showIconCheckBox->setChecked(true);
      QSystemTrayIcon::MessageIcon msgIcon = QSystemTrayIcon::MessageIcon(
              typeComboBox->itemData(typeComboBox->currentIndex()).toInt());
      if (msgIcon == QSystemTrayIcon::NoIcon) {
          QIcon icon(iconComboBox->itemIcon(iconComboBox->currentIndex()));
          trayIcon->showMessage(titleEdit->text(), bodyEdit->toPlainText(), icon,
                            durationSpinBox->value() * 1000);
      } else {
          trayIcon->showMessage(titleEdit->text(), bodyEdit->toPlainText(), msgIcon,
                            durationSpinBox->value() * 1000);
      }
  }

  void Window::messageClicked()
  {
      QMessageBox::information(0, tr("Systray"),
                               tr("Sorry, I already gave what help I could.\n"
                                  "Maybe you should try asking a human?"));
  }

  void Window::createIconGroupBox()
  {
      iconGroupBox = new QGroupBox(tr("Tray Icon"));

      iconLabel = new QLabel("Icon:");

      iconComboBox = new QComboBox;
      iconComboBox->addItem(QIcon(":/images/bad.png"), tr("Bad"));
      iconComboBox->addItem(QIcon(":/images/heart.png"), tr("Heart"));
      iconComboBox->addItem(QIcon(":/images/trash.png"), tr("Trash"));

      showIconCheckBox = new QCheckBox(tr("Show icon"));
      showIconCheckBox->setChecked(true);

      QHBoxLayout *iconLayout = new QHBoxLayout;
      iconLayout->addWidget(iconLabel);
      iconLayout->addWidget(iconComboBox);
      iconLayout->addStretch();
      iconLayout->addWidget(showIconCheckBox);
      iconGroupBox->setLayout(iconLayout);
  }

  void Window::createMessageGroupBox()
  {
      messageGroupBox = new QGroupBox(tr("Balloon Message"));

      typeLabel = new QLabel(tr("Type:"));

      typeComboBox = new QComboBox;
      typeComboBox->addItem(tr("None"), QSystemTrayIcon::NoIcon);
      typeComboBox->addItem(style()->standardIcon(
              QStyle::SP_MessageBoxInformation), tr("Information"),
              QSystemTrayIcon::Information);
      typeComboBox->addItem(style()->standardIcon(
              QStyle::SP_MessageBoxWarning), tr("Warning"),
              QSystemTrayIcon::Warning);
      typeComboBox->addItem(style()->standardIcon(
              QStyle::SP_MessageBoxCritical), tr("Critical"),
              QSystemTrayIcon::Critical);
      typeComboBox->addItem(QIcon(), tr("Custom icon"),
              QSystemTrayIcon::NoIcon);
      typeComboBox->setCurrentIndex(1);

      durationLabel = new QLabel(tr("Duration:"));

      durationSpinBox = new QSpinBox;
      durationSpinBox->setRange(5, 60);
      durationSpinBox->setSuffix(" s");
      durationSpinBox->setValue(15);

      durationWarningLabel = new QLabel(tr("(some systems might ignore this "
                                           "hint)"));
      durationWarningLabel->setIndent(10);

      titleLabel = new QLabel(tr("Title:"));

      titleEdit = new QLineEdit(tr("Cannot connect to network"));

      bodyLabel = new QLabel(tr("Body:"));

      bodyEdit = new QTextEdit;
      bodyEdit->setPlainText(tr("Don't believe me. Honestly, I don't have a "
                                "clue.\nClick this balloon for details."));

      showMessageButton = new QPushButton(tr("Show Message"));
      showMessageButton->setDefault(true);

      QGridLayout *messageLayout = new QGridLayout;
      messageLayout->addWidget(typeLabel, 0, 0);
      messageLayout->addWidget(typeComboBox, 0, 1, 1, 2);
      messageLayout->addWidget(durationLabel, 1, 0);
      messageLayout->addWidget(durationSpinBox, 1, 1);
      messageLayout->addWidget(durationWarningLabel, 1, 2, 1, 3);
      messageLayout->addWidget(titleLabel, 2, 0);
      messageLayout->addWidget(titleEdit, 2, 1, 1, 4);
      messageLayout->addWidget(bodyLabel, 3, 0);
      messageLayout->addWidget(bodyEdit, 3, 1, 2, 4);
      messageLayout->addWidget(showMessageButton, 5, 4);
      messageLayout->setColumnStretch(3, 1);
      messageLayout->setRowStretch(4, 1);
      messageGroupBox->setLayout(messageLayout);
  }

  void Window::createActions()
  {
      minimizeAction = new QAction(tr("Mi&nimize"), this);
      connect(minimizeAction, &QAction::triggered, this, &QWidget::hide);

      maximizeAction = new QAction(tr("Ma&ximize"), this);
      connect(maximizeAction, &QAction::triggered, this, &QWidget::showMaximized);

      restoreAction = new QAction(tr("&Restore"), this);
      connect(restoreAction, &QAction::triggered, this, &QWidget::showNormal);

      quitAction = new QAction(tr("&Quit"), this);
      connect(quitAction, &QAction::triggered, qApp, &QCoreApplication::quit);
  }

  void Window::createTrayIcon()
  {
      trayIconMenu = new QMenu(this);
      trayIconMenu->addAction(minimizeAction);
      trayIconMenu->addAction(maximizeAction);
      trayIconMenu->addAction(restoreAction);
      trayIconMenu->addSeparator();
      trayIconMenu->addAction(quitAction);

      trayIcon = new QSystemTrayIcon(this);
      trayIcon->setContextMenu(trayIconMenu);
  }

  #endif

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