rssguard/src/gui/formmain.cpp

#include <QCloseEvent>

#include "gui/formmain.h"
#include "gui/formabout.h"
#include "gui/formsettings.h"
#include "gui/webbrowser.h"
#include "gui/iconthemefactory.h"
#include "gui/systemtrayicon.h"
#include "gui/tabbar.h"
#include "core/settings.h"
#include "core/defs.h"
#include "qtsingleapplication/qtsingleapplication.h"


FormMain *FormMain::s_instance;

FormMain::FormMain(QWidget *parent) : QMainWindow(parent), m_ui(new Ui::FormMain) {
  m_ui->setupUi(this);

  // Initialize singleton.
  s_instance = this;

  // Prepare main window and tabs.
  prepareMenus();
  m_ui->m_tabWidget->initializeTabs();

  // Establish connections.
  createConnections();

  setupIcons();
}

FormMain::~FormMain() {
  delete m_ui;

  if (SystemTrayIcon::isSystemTrayAvailable()) {
    delete m_trayMenu;
    qDebug("Deleting tray icon menu.");
  }
}

FormMain *FormMain::getInstance() {
  return s_instance;
}

QMenu *FormMain::getTrayMenu() {
  return m_trayMenu;
}

TabWidget *FormMain::getTabWidget() {
  return m_ui->m_tabWidget;
}

QList<QAction*> FormMain::getActions() {
  QList<QAction*> actions;
  actions << m_ui->m_actionImport << m_ui->m_actionExport <<
             m_ui->m_actionSettings << m_ui->m_actionQuit <<
             m_ui->m_actionFullscreen << m_ui->m_actionAboutGuard;
  return actions;
}

void FormMain::prepareMenus() {
  // Setup menu for tray icon.
  if (SystemTrayIcon::isSystemTrayAvailable()) {
#if defined(Q_OS_WIN)
    m_trayMenu = new TrayIconMenu(APP_NAME, this);
#else
    m_trayMenu = new QMenu(APP_NAME, this);
#endif

    // Add needed items to the menu.
    m_trayMenu->addAction(m_ui->m_actionSettings);
    m_trayMenu->addAction(m_ui->m_actionQuit);

    qDebug("Creating tray icon menu.");
  }
}

void FormMain::processExecutionMessage(const QString &message) {
  qDebug("Received '%s' execution message from another application instance.",
         qPrintable(message));
  display();
}

void FormMain::quit() {
  qDebug("Quitting the application.");
  qApp->quit();
}

void FormMain::switchFullscreenMode(bool turn_fullscreen_on) {
  if (turn_fullscreen_on) {
    showFullScreen();
  } else {
    showNormal();
  }
}

void FormMain::switchVisibility() {
  if (isVisible()) {
    hide();
  }
  else {
    display();
  }
}

void FormMain::display() {
  // Make sure window is not minimized.
  setWindowState(windowState() & ~Qt::WindowMinimized);

  // Display the window and make sure it is raised on top.
  show();
  activateWindow();
  raise();

  // Raise alert event. Check the documentation for more info on this.
  QtSingleApplication::alert(this);
}

void FormMain::cleanupResources() {
  qDebug("Cleaning up resources before the application exits.");
}

bool FormMain::event(QEvent *event) {
  if (event->type() == ThemeFactoryEvent::type()) {
    // Handle the change of icon theme.
    setupIcons();
    event->accept();
    return true;
  }

  return QMainWindow::event(event);
}

void FormMain::setupIcons() {
  // Setup icons of this main window.
  m_ui->m_actionSettings->setIcon(IconThemeFactory::getInstance()->fromTheme("preferences-system"));
  m_ui->m_actionQuit->setIcon(IconThemeFactory::getInstance()->fromTheme("application-exit"));
  m_ui->m_actionAboutGuard->setIcon(IconThemeFactory::getInstance()->fromTheme("help-about"));
  m_ui->m_actionImport->setIcon(IconThemeFactory::getInstance()->fromTheme("document-import"));
  m_ui->m_actionExport->setIcon(IconThemeFactory::getInstance()->fromTheme("document-export"));
  m_ui->m_actionFullscreen->setIcon(IconThemeFactory::getInstance()->fromTheme("view-fullscreen"));

  // Setup icons for underlying components: opened web browsers...
  foreach (WebBrowser *browser, WebBrowser::runningWebBrowsers()) {
    browser->setupIcons();
  }

  // Setup icons on TabWidget too.
  m_ui->m_tabWidget->setupIcons();
}

void FormMain::createConnections() {
  // Menu "File" connections.
  connect(m_ui->m_actionQuit, SIGNAL(triggered()), this, SLOT(quit()));

  // Menu "View" connections.
  connect(m_ui->m_actionFullscreen, SIGNAL(triggered(bool)), this, SLOT(switchFullscreenMode(bool)));

  // Menu "Tools" connections.
  connect(m_ui->m_actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));

  // Menu "Help" connections.
  connect(m_ui->m_actionAboutGuard, SIGNAL(triggered()), this, SLOT(showAbout()));

  // General connections.
  connect(qApp, SIGNAL(aboutToQuit()), this, SLOT(cleanupResources()));
}

void FormMain::closeEvent(QCloseEvent *event) {
  if (SystemTrayIcon::isSystemTrayActivated()) {
    if (Settings::getInstance()->value(APP_CFG_GUI,
                                       "close_win_action",
                                       0).toInt() == 0) {
      // User selected to minimize the application if its main
      // window gets closed and tray icon is activated.
      hide();
      event->ignore();
    }
    else {
      // User selected to quit the application if its main
      // window gets closed and tray icon is activated.
      qApp->quit();
    }
  }
}

void FormMain::showAbout() {
  FormAbout(this).exec();
}

void FormMain::showSettings() {
  FormSettings(this).exec();
}