Available update can be checked via menu action Help/"Check for update".

mainwindow.cpp

@@ -2,10 +2,14 @@
 #include "./ui_mainwindow.h"
 
 #include <QCloseEvent>
+#include <QMessageBox>
 
 #include "data/settingshandler.h"
 #include "genericcore.h"
 
+static QString updateTextClean = "Do you want to update the application now?";
+static QString updateTextDirty = "Do you want to save the tasks & update the application now?";
+
 MainWindow::MainWindow(QWidget* parent)
     : QMainWindow(parent)
     , ui(new Ui::MainWindow) {
@@ -32,6 +36,8 @@ MainWindow::MainWindow(QWidget* parent)
 
   connect(m_core, &GenericCore::displayStatusMessage, this, &MainWindow::displayStatusMessage);
   connect(this, &MainWindow::displayStatusMessage, this, &MainWindow::showStatusMessage);
+  connect(this, &MainWindow::checkForUpdates, this,
+          &MainWindow::on_actionCheck_for_update_triggered, Qt::QueuedConnection);
 }
 
 MainWindow::~MainWindow() {
@@ -49,6 +55,20 @@ void MainWindow::showStatusMessage(const QString text) {
   ui->statusbar->showMessage(text);
 }
 
+void MainWindow::on_actionCheck_for_update_triggered() {
+  showStatusMessage("Checking for update...");
+  const bool updateAvailable = m_core->isApplicationUpdateAvailable();
+  if (updateAvailable) {
+    const QString text = isWindowModified() ? updateTextDirty : updateTextClean;
+    const QMessageBox::StandardButton clickedButton = QMessageBox::question(
+        this, tr("Update available."), text, QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);
+    if (clickedButton == QMessageBox::Yes) {
+      m_core->triggerApplicationUpdate();
+      close();
+    }
+  }
+}
+
 void MainWindow::closeEvent(QCloseEvent* event) {
   if (isWindowModified()) {
     QMessageBox msgBox;

mainwindow.h

@@ -21,14 +21,17 @@ class MainWindow : public QMainWindow {
 
  signals:
   void displayStatusMessage(QString message);
+  void checkForUpdates();
 
  protected:
   void closeEvent(QCloseEvent* event) override;
 
  private slots:
-  void on_pushButton_clicked();
-
   void showStatusMessage(const QString text);
+
+  void on_pushButton_clicked();
+  void on_actionCheck_for_update_triggered();
+
  private:
   Ui::MainWindow* ui;
 

mainwindow.ui

@@ -40,8 +40,38 @@
      <height>25</height>
     </rect>
    </property>
+   <widget class="QMenu" name="menu_File">
+    <property name="title">
+     <string>&amp;File</string>
+    </property>
+   </widget>
+   <widget class="QMenu" name="menu_Edit">
+    <property name="title">
+     <string>&amp;Edit</string>
+    </property>
+   </widget>
+   <widget class="QMenu" name="menu_View">
+    <property name="title">
+     <string>&amp;View</string>
+    </property>
+   </widget>
+   <widget class="QMenu" name="menu_Help">
+    <property name="title">
+     <string>&amp;Help</string>
+    </property>
+    <addaction name="actionCheck_for_update"/>
+   </widget>
+   <addaction name="menu_File"/>
+   <addaction name="menu_Edit"/>
+   <addaction name="menu_View"/>
+   <addaction name="menu_Help"/>
   </widget>
   <widget class="QStatusBar" name="statusbar"/>
+  <action name="actionCheck_for_update">
+   <property name="text">
+    <string>Check for &amp;update</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections/>