Added Settings, Debugging classes and some enhancements to the code.

CMakeLists.txt

@@ -48,8 +48,8 @@ message(STATUS "[${APP_LOW_NAME}] Revision number obtained: " ${APP_REVISION} ".
 
 # Configure internal C++ defines.
 configure_file (
-  ${PROJECT_SOURCE_DIR}/src/defs.h.in
-  ${CMAKE_CURRENT_BINARY_DIR}/src/defs.h
+  ${PROJECT_SOURCE_DIR}/src/core/defs.h.in
+  ${CMAKE_CURRENT_BINARY_DIR}/src/core/defs.h
 )
 
 # Configure executable "properties" for Windows.
@@ -152,6 +152,11 @@ set(APP_SOURCES
 
   # GUI sources.
   src/gui/formmain.cpp
+  src/gui/systemtrayicon.cpp
+
+  # CORE sources.
+  src/core/debugging.cpp
+  src/core/settings.cpp
 
   # Basic application sources.
   src/main.cpp
@@ -168,6 +173,9 @@ set(APP_HEADERS
 
   # GUI headers.
   src/gui/formmain.h
+  src/gui/systemtrayicon.cpp
+
+  # CORE headers.
 )
 
 # Add form files.

src/core/debugging.cpp

@@ -0,0 +1,46 @@
+#include <QApplication>
+#include <QDir>
+
+#include "core/defs.h"
+#include "core/debugging.h"
+
+#include <cstdio>
+
+#ifndef QT_NO_DEBUG_OUTPUT
+#define DEBUG_OUTPUT_WORKER(type_string, file, line, message) \
+  fprintf(stderr, "[%s] %s (%s:%d): %s\n", \
+  APP_LOW_NAME, \
+  type_string, \
+  file, \
+  line, \
+  qPrintable(message));
+#endif
+
+
+void Debugging::debugHandler(QtMsgType type,
+                             const QMessageLogContext &placement,
+                             const QString &message) {
+#ifndef QT_NO_DEBUG_OUTPUT
+  const char *file = qPrintable(QString(placement.file).section(QDir::separator(), -1));
+  switch (type) {
+    case QtDebugMsg:
+      DEBUG_OUTPUT_WORKER("INFO", file, placement.line, message);
+      break;
+    case QtWarningMsg:
+      DEBUG_OUTPUT_WORKER("WARNING", file, placement.line, message);
+      break;
+    case QtCriticalMsg:
+      DEBUG_OUTPUT_WORKER("CRITICAL", file, placement.line, message);
+      break;
+    case QtFatalMsg:
+      DEBUG_OUTPUT_WORKER("FATAL", file, placement.line, message);
+      qApp->exit(EXIT_FAILURE);
+    default:
+      break;
+  }
+#else
+  Q_UNUSED(type);
+  Q_UNUSED(placement);
+  Q_UNUSED(message);
+#endif
+}

src/core/debugging.h

@@ -0,0 +1,17 @@
+#ifndef DEBUGGING_H
+#define DEBUGGING_H
+
+#include <QtGlobal>
+
+
+class Debugging {
+  public:
+    // Specifies format of output console messages.
+    // Macros:
+    //    QT_NO_DEBUG_OUTPUT - disables debug outputs completely!!!
+    static void debugHandler(QtMsgType type,
+                             const QMessageLogContext &placement,
+                             const QString &message);
+};
+
+#endif // DEBUGGING_H

src/core/defs.h.in

@@ -14,9 +14,8 @@
 
 #define APP_CFG_PATH        "data/config/config.ini"
 #define APP_CFG_GUI         "gui"
-#define APP_CFG_GEN         "main"
-#define APP_CFG_CALC        "calculator"
-#define APP_CFG_LANG        "language"
+#define APP_CFG_GEN         "general"
+#define APP_CFG_LANG        "localization"
 
 #define APP_DB_PATH         "data/storage/database.db"
 #define APP_PREFIX          "@CMAKE_INSTALL_PREFIX@"
@@ -29,15 +28,18 @@
 #define APP_LANG_PATH APP_PREFIX + QString("/share/qonverter/l10n")
 #define APP_SKIN_PATH APP_PREFIX + QString("/share/qonverter/skins")
 #define APP_INFO_PATH APP_PREFIX + QString("/share/qonverter/information")
+#define APP_THEME_PATH APP_PREFIX + QString("/share/qonverter/themes")
 #elif defined(Q_OS_MAC)
 #define APP_LANG_PATH QApplication::applicationDirPath() + "/../Resources/l10n"
 #define APP_SKIN_PATH QApplication::applicationDirPath() + "/../Resources/skins"
 #define APP_PLUGIN_PATH QApplication::applicationDirPath() + "/../Resources/plugins"
 #define APP_INFO_PATH QApplication::applicationDirPath() + "/../Resources/information"
+#define APP_THEME_PATH QApplication::applicationDirPath() + "/../Resources/themes"
 #elif defined(Q_OS_WIN) || defined(Q_OS_OS2)
 #define APP_LANG_PATH QApplication::applicationDirPath() + QString("/l10n")
 #define APP_SKIN_PATH QApplication::applicationDirPath() + QString("/skins")
 #define APP_INFO_PATH QApplication::applicationDirPath()
+#define APP_THEME_PATH QApplication::applicationDirPath() + QString("/themes")
 #endif
 
 #endif // DEFS_H

src/core/settings.cpp

@@ -0,0 +1,84 @@
+/*
+    This file is part of Qonverter.
+
+    Qonverter is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Qonverter is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Qonverter.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2012 - 2013 Martin Rotter
+*/
+
+#include <QApplication>
+#include <QDebug>
+#include <QDir>
+#include <QPointer>
+
+#include "core/settings.h"
+#include "core/defs.h"
+
+
+QPointer<QSettings> Settings::s_instance;
+
+QSettings::Status Settings::checkSettings() {
+  qDebug("Syncing settings.");
+  s_instance->sync();
+
+  return s_instance->status();
+}
+
+QVariant Settings::value(const QString &section,
+                         const QString &key,
+                         const QVariant &default_value) {
+  if (s_instance.isNull()) {
+    setupSettings();
+  }
+  return s_instance->value(QString("%1/%2").arg(section, key), default_value);
+}
+
+void Settings::setValue(const QString &section,
+                        const QString &key,
+                        const QVariant &value) {
+  if (s_instance.isNull()) {
+    setupSettings();
+  }
+  s_instance->setValue(QString("%1/%2").arg(section, key), value);
+}
+
+void Settings::deleteSettings() {
+  checkSettings();
+  qDebug("Deleting global settings.");
+  delete s_instance.data();
+}
+
+QSettings::Status Settings::setupSettings() {
+  // If settings file exists in executable file working directory,
+  // then use it (portable settings).
+  // Otherwise use settings file stored in homePath();
+  QString home_path = QDir::homePath() + QDir::separator() +
+                      APP_LOW_H_NAME + QDir::separator() +
+                      APP_CFG_PATH;
+  QString app_path = qApp->applicationDirPath() + QDir::separator() +
+                     APP_CFG_PATH;
+
+  if (QFile(app_path).exists()) {
+    s_instance = new QSettings(app_path, QSettings::IniFormat);
+    qDebug("Initializing settings in %s.",
+           qPrintable(QDir::toNativeSeparators(app_path)));
+  }
+  else {
+    s_instance = new QSettings(home_path, QSettings::IniFormat);
+    qDebug("Initializing settings in %s.",
+           qPrintable(QDir::toNativeSeparators(home_path)));
+  }
+
+  return checkSettings();
+}

src/core/settings.h

@@ -0,0 +1,34 @@
+#ifndef SETTINGS_H
+#define SETTINGS_H
+
+#include <QSettings>
+
+
+class Settings {
+  private:
+    // We use QPointer instead of QScopedPointer
+    // because of late s_instance usage in QApplication::aboutToQuit() listeners.
+    static QPointer<QSettings> s_instance;
+
+  public:
+    // Getter/setter for settings values.
+    static QVariant value(const QString &section,
+                          const QString &key,
+                          const QVariant &default_value = QVariant());
+
+    static void setValue(const QString &section,
+                         const QString &key,
+                         const QVariant &value);
+
+    // It's better to cleanup settings manually via this function.
+    static void deleteSettings();
+
+    // Synchronises settings.
+    static QSettings::Status checkSettings();
+
+  protected:
+    // Creates settings file in correct location.
+    static QSettings::Status setupSettings();
+};
+
+#endif // SETTINGS_H

src/gui/formmain.cpp

@@ -1,8 +1,12 @@
-#include "formmain.h"
+#include "gui/formmain.h"
+#include "core/settings.h"
+#include "qtsingleapplication/qtsingleapplication.h"
 
 
 FormMain::FormMain(QWidget *parent) : QMainWindow(parent), m_ui(new Ui::FormMain) {
   m_ui->setupUi(this);
+
+  createConnections();
 }
 
 FormMain::~FormMain() {
@@ -11,4 +15,14 @@ FormMain::~FormMain() {
 
 void FormMain::processExecutionMessage(const QString &message) {
   // TODO: Implement proper reaction when application is launched more than once.
+  qDebug("Received '%s' execution message from another application instance.",
+         qPrintable(message));
+}
+
+void FormMain::cleanupResources() {
+  Settings::deleteSettings();
+}
+
+void FormMain::createConnections() {
+  connect(qApp, &QCoreApplication::aboutToQuit, this, &FormMain::cleanupResources);
 }

src/gui/formmain.h

@@ -13,8 +13,14 @@ class FormMain : public QMainWindow {
     explicit FormMain(QWidget *parent = 0);
     ~FormMain();
 
+  protected:
+    void createConnections();
+
   public slots:
     void processExecutionMessage(const QString &message);
+
+  protected slots:
+    void cleanupResources();
     
   private:
     Ui::FormMain *m_ui;

src/gui/systemtrayicon.cpp

@@ -0,0 +1,5 @@
+#include "systemtrayicon.h"
+
+
+SystemTrayIcon::SystemTrayIcon(QObject *parent) : QSystemTrayIcon(parent) {
+}

src/gui/systemtrayicon.h

@@ -0,0 +1,18 @@
+#ifndef SYSTEMTRAYICON_H
+#define SYSTEMTRAYICON_H
+
+#include <QSystemTrayIcon>
+
+class SystemTrayIcon : public QSystemTrayIcon
+{
+    Q_OBJECT
+  public:
+    explicit SystemTrayIcon(QObject *parent = 0);
+    
+  signals:
+    
+  public slots:
+    
+};
+
+#endif // SYSTEMTRAYICON_H

src/main.cpp

@@ -1,10 +1,14 @@
-#include <QMainWindow>
+// Needed for setting ini file format on Mac OS.
+#ifdef Q_OS_MAC
+#include <QSettings>
+#endif
 
+#include "core/defs.h"
+#include "core/debugging.h"
+#include "core/settings.h"
 #include "gui/formmain.h"
 #include "qtsingleapplication/qtsingleapplication.h"
 
-#include "defs.h"
-
 
 int main(int argc, char *argv[]) {
   //: Name of language, e.g. English.
@@ -19,23 +23,57 @@ int main(int argc, char *argv[]) {
   //: Email of translator - optional.
   QObject::tr("LANG_EMAIL");
 
+  // Ensure that ini format is used as application settings storage on Mac OS.
+#ifdef Q_OS_MAC
+  QSettings::setDefaultFormat(QSettings::IniFormat);
+#endif
+
+  // Setup debug output system.
+  qInstallMessageHandler(Debugging::debugHandler);
+
   // TODO: Finish implementation of QtSingleApplication into RSS Guard.
   // This primarily concerns slot in FormMain which reacts when application is launched
   // repeatedly. See 'trivial' example from QtSingleApplication source code for more
   // information.
   QtSingleApplication application(argc, argv);
+  qDebug("Instantiated QtSingleApplication class.");
 
+  // Check if another instance is running.
   if (application.sendMessage(APP_IS_RUNNING)) {
+    qDebug("Another instance of the application is already running. Notifying it.");
     return EXIT_SUCCESS;
   }
 
+  // Add 3rd party plugin directory to application PATH variable.
+  // This is useful for styles, encoders, ...
+  // This is probably not needed on Windows or Linux, not sure about Mac OS X.
+#if defined(Q_OS_MAC)
+  QApplication::addLibraryPath(APP_PLUGIN_PATH);
+#endif
+
+  // These settings needs to be set before any QSettings object.
+  QtSingleApplication::setApplicationName(APP_NAME);
+  QtSingleApplication::setApplicationVersion(APP_VERSION);
+  QtSingleApplication::setOrganizationName(APP_AUTHORS);
+  QtSingleApplication::setOrganizationDomain(APP_URL);
+  QtSingleApplication::setWindowIcon(QIcon(":/graphics/qonverter.png"));
+
+  // Instantiate main application window.
   FormMain window;
 
   window.show();
-  application.setActivationWindow(&window, true);
 
+  if (Settings::value(APP_CFG_GEN, "first_start", true).toBool()) {
+    // TODO: Open initial "Welcome" dialog here.
+    Settings::setValue(APP_CFG_GEN, "first_start", false);
+  }
+
+
+  // Setup single-instance behavior.
+  application.setActivationWindow(&window, true);
   QObject::connect(&application, &QtSingleApplication::messageReceived,
                    &window, &FormMain::processExecutionMessage);
 
+  // Enter global event loop.
   return QtSingleApplication::exec();
 }