feat: expose language settings, populate a basic spanish translation

src/apps/deskflow-gui/deskflow-gui.cpp

@@ -64,6 +64,9 @@ int main(int argc, char *argv[])
 
   QApplication app(argc, argv);
 
+  // Ensure the I18N object is made before strings
+  QTextStream(stdout) << "initial language: " << I18N::currentLanguage();
+
   // Add Command Line Options
   auto helpOption = QCommandLineOption({"h", "help"}, "Display Help on the command line");
   auto versionOption = QCommandLineOption({"v", "version"}, "Display version information");

src/lib/gui/dialogs/FingerprintDialog.cpp

@@ -125,8 +125,8 @@ void FingerprintDialog::togglePreviewMode(bool hashMode)
 
 void FingerprintDialog::updateModeButton(bool hashMode) const
 {
-  const auto text = tr("Show %1").arg(hashMode ? "Image" : "Hash");
+  const auto text = hashMode ? tr("Show image") : tr("Show hash");
-  const auto toolTip = tr("Display the fingerprint as %1").arg(hashMode ? "an image" : "a hash");
+  const auto toolTip = hashMode ? tr("Display the fingerprint as an image") : tr("Display the fingerprint as a hash");
   m_buttonBox->button(QDialogButtonBox::Help)->setText(text);
   m_buttonBox->button(QDialogButtonBox::Help)->setToolTip(toolTip);
 }

src/lib/gui/dialogs/SettingsDialog.cpp

@@ -9,12 +9,14 @@
 #include "SettingsDialog.h"
 #include "ui_SettingsDialog.h"
 
+#include "common/I18N.h"
 #include "common/Settings.h"
 #include "gui/Messages.h"
 #include "gui/core/CoreProcess.h"
 #include "gui/tls/TlsCertificate.h"
 #include "gui/tls/TlsUtility.h"
 
+#include <QComboBox>
 #include <QDir>
 #include <QFileDialog>
 #include <QMessageBox>
@@ -31,6 +33,11 @@ SettingsDialog::SettingsDialog(QWidget *parent, const IServerConfig &serverConfi
 
   ui->setupUi(this);
 
+  // set up the language combo
+  I18N::reDetectLanguages();
+  ui->comboLanguage->addItems(I18N::detectedLanguages());
+  ui->comboLanguage->setCurrentText(I18N::currentLanguage());
+
   // Set Tooltip for the logLevel Items
   ui->comboLogLevel->setItemData(0, tr("Required messages"), Qt::ToolTipRole);
   ui->comboLogLevel->setItemData(1, tr("Non-fatal errors"), Qt::ToolTipRole);
@@ -77,6 +84,7 @@ void SettingsDialog::initConnections() const
   connect(ui->btnBrowseLog, &QPushButton::clicked, this, &SettingsDialog::browseLogPath);
   connect(ui->cbLogToFile, &QCheckBox::toggled, this, &SettingsDialog::setLogToFile);
   connect(ui->comboLogLevel, &QComboBox::currentIndexChanged, this, &SettingsDialog::logLevelChanged);
+  connect(ui->comboLanguage, &QComboBox::currentTextChanged, I18N::instance(), &I18N::setLanguage);
 }
 
 void SettingsDialog::regenCertificates()
@@ -154,6 +162,7 @@ void SettingsDialog::accept()
   Settings::setValue(Settings::Gui::SymbolicTrayIcon, ui->rbIconMono->isChecked());
   Settings::setValue(Settings::Security::CheckPeers, ui->cbRequireClientCert->isChecked());
   Settings::setValue(Settings::Client::ScrollSpeed, ui->sbScrollSpeed->value());
+  Settings::setValue(Settings::Core::Language, ui->comboLanguage->currentText());
 
   Settings::ProcessMode mode;
   if (ui->groupService->isChecked())

src/lib/gui/dialogs/SettingsDialog.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>549</width>
-    <height>611</height>
+    <height>628</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -32,10 +32,7 @@
       <attribute name="title">
        <string>&amp;Regular</string>
       </attribute>
-      <layout class="QVBoxLayout" name="_8">
+      <layout class="QVBoxLayout" name="verticalLayout_3">
-       <property name="spacing">
-        <number>15</number>
-       </property>
        <item>
         <widget class="QGroupBox" name="groupClientOptions">
          <property name="sizePolicy">
@@ -106,11 +103,11 @@
          <property name="title">
           <string>App</string>
          </property>
-         <layout class="QVBoxLayout" name="_9">
+         <layout class="QVBoxLayout" name="verticalLayout_2">
           <item>
            <widget class="QCheckBox" name="cbAutoUpdate">
             <property name="text">
-             <string>Check for updates on startup </string>
+             <string>Check for updates on startup</string>
             </property>
            </widget>
           </item>
@@ -337,13 +334,7 @@
       <attribute name="title">
        <string>&amp;Advanced</string>
       </attribute>
-      <layout class="QVBoxLayout" name="_2">
+      <layout class="QVBoxLayout" name="verticalLayout_4">
-       <property name="spacing">
-        <number>15</number>
-       </property>
-       <property name="topMargin">
-        <number>9</number>
-       </property>
        <item>
         <widget class="QGroupBox" name="groupNetworking">
          <property name="sizePolicy">
@@ -638,6 +629,31 @@
          </layout>
         </widget>
        </item>
+       <item>
+        <widget class="QWidget" name="widgetLanguage" native="true">
+         <property name="toolTip">
+          <string>Force a language to be used for the GUI.</string>
+         </property>
+         <layout class="QHBoxLayout" name="horizontalLayout_3">
+          <item>
+           <widget class="QLabel" name="lblLanguage">
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Maximum" vsizetype="Preferred">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
+            </property>
+            <property name="text">
+             <string>Language</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QComboBox" name="comboLanguage"/>
+          </item>
+         </layout>
+        </widget>
+       </item>
        <item>
         <spacer name="verticalSpacer">
          <property name="orientation">
@@ -651,6 +667,11 @@
          </property>
         </spacer>
        </item>
+       <item>
+        <widget class="QWidget" name="widgetLangControls" native="true">
+         <layout class="QHBoxLayout" name="horizontalLayout_2"/>
+        </widget>
+       </item>
       </layout>
      </widget>
     </widget>
@@ -668,7 +689,6 @@
   </layout>
  </widget>
  <tabstops>
-  <tabstop>tabWidget</tabstop>
   <tabstop>cbLanguageSync</tabstop>
   <tabstop>cbScrollDirection</tabstop>
   <tabstop>cbAutoUpdate</tabstop>

src/lib/gui/widgets/NewScreenWidget.cpp

@@ -21,6 +21,7 @@ NewScreenWidget::NewScreenWidget(QWidget *parent) : QLabel(parent)
 
 void NewScreenWidget::mousePressEvent(QMouseEvent *event)
 {
+  //: Used as the hostname. Translation may not contain spaces
   Screen newScreen(tr("Unnamed"));
 
   QByteArray itemData;