feat: add option to hide menubar

Add a "View" submenu to the menubar, that allows the user hide
the menubar. Also add a keyboard shortcut (Ctrl + M) to toggle
the visibility of the menubar. This preference is saved, so it
can be restored once the user closes and reopens Zeal.

This preference is tipically only accessible through the menubar,
so don't add an entry for it in the "Preferences" window.

src/libs/core/settings.cpp

@@ -114,6 +114,8 @@ void Settings::load()
     minimizeToSystray = settings->value(QStringLiteral("minimize_to_systray"), false).toBool();
     hideOnClose = settings->value(QStringLiteral("hide_on_close"), false).toBool();
 
+    hideMenuBar = settings->value(QStringLiteral("hide_menu_bar"), false).toBool();
+
     settings->beginGroup(GroupGlobalShortcuts);
     showShortcut = settings->value(QStringLiteral("show")).value<QKeySequence>();
     settings->endGroup();
@@ -246,6 +248,8 @@ void Settings::save()
     settings->setValue(QStringLiteral("minimize_to_systray"), minimizeToSystray);
     settings->setValue(QStringLiteral("hide_on_close"), hideOnClose);
 
+    settings->setValue(QStringLiteral("hide_menu_bar"), hideMenuBar);
+
     settings->beginGroup(GroupGlobalShortcuts);
     settings->setValue(QStringLiteral("show"), showShortcut);
     settings->endGroup();

src/libs/core/settings.h

@@ -58,6 +58,9 @@ class Settings final : public QObject
     // Tabs Behavior
     bool openNewTabAfterActive;
 
+    // Appearance
+    bool hideMenuBar;
+
     // Search
     bool isFuzzySearchEnabled;
 

src/libs/ui/mainwindow.cpp

@@ -154,6 +154,19 @@ MainWindow::MainWindow(Core::Application *app, QWidget *parent)
         dialog->exec();
     });
 
+    // View Menu
+    ui->actionHideMenu->setShortcut(QStringLiteral("Ctrl+m"));
+    connect(ui->actionHideMenu, &QAction::triggered, this, [this]() {
+        if (ui->menuBar->isVisible()) {
+            m_settings->hideMenuBar = true;
+        }
+        else {
+            m_settings->hideMenuBar = false;
+        }
+        applySettings();
+    });
+    addAction(ui->actionHideMenu);
+
     // Help Menu
     connect(ui->actionSubmitFeedback, &QAction::triggered, []() {
         QDesktopServices::openUrl(QUrl(QStringLiteral("https://github.com/zealdocs/zeal/issues")));
@@ -533,6 +546,13 @@ void MainWindow::applySettings()
         m_globalShortcut->setShortcut(m_settings->showShortcut);
     }
 
+    if (m_settings->hideMenuBar){
+        ui->menuBar->hide();
+    }
+    else {
+        ui->menuBar->show();
+    }
+
     if (m_settings->showSystrayIcon)
         createTrayIcon();
     else

src/libs/ui/mainwindow.ui

@@ -94,6 +94,12 @@
     <addaction name="separator"/>
     <addaction name="actionPreferences"/>
    </widget>
+   <widget class="QMenu" name="menu_View">
+    <property name="title">
+     <string>&amp;View</string>
+    </property>
+    <addaction name="actionHideMenu"/>
+   </widget>
    <widget class="QMenu" name="menu_Tools">
     <property name="title">
      <string>&amp;Tools</string>
@@ -102,6 +108,7 @@
    </widget>
    <addaction name="menuFile"/>
    <addaction name="menu_Edit"/>
+   <addaction name="menu_View"/>
    <addaction name="menu_Tools"/>
    <addaction name="menuHelp"/>
   </widget>
@@ -175,6 +182,11 @@
     <string>&amp;Find</string>
    </property>
   </action>
+  <action name="actionHideMenu">
+   <property name="text">
+    <string>&amp;Hide menubar</string>
+   </property>
+  </action>
   <action name="actionDocsets">
    <property name="text">
     <string>&amp;Docsets…</string>