[license] Tidy code

- Move retranslation to a separate slot to allow it to be
   formatted nicely.
 - Use calculated m_allLicensesOptional in retranslation.
 - Untangle determining if all licenses are optional; std::none_of
   returns true on an empty list.

src/modules/license/LicensePage.cpp

@@ -126,7 +126,6 @@ LicensePage::LicensePage( QWidget* parent )
     CALAMARES_RETRANSLATE( ui->acceptCheckBox->setText( tr( "I accept the terms and conditions above." ) ); )
 }
 
-
 void
 LicensePage::setEntries( const QList< LicenseEntry >& entriesList )
 {
@@ -134,27 +133,36 @@ LicensePage::setEntries( const QList< LicenseEntry >& entriesList )
     m_entries.clear();
     m_entries.reserve( entriesList.count() );
 
-    const bool required
-        = std::any_of( entriesList.cbegin(), entriesList.cend(), []( const LicenseEntry& e ) { return e.m_required; } );
-    if ( entriesList.isEmpty() )
-    {
-        m_allLicensesOptional = true;
-    }
-    else
+    auto isRequired = []( const LicenseEntry& e ) { return e.m_required; };
+    m_allLicensesOptional = std::none_of( entriesList.cbegin(), entriesList.cend(), isRequired );
+
+    checkAcceptance( false );
+
+    for ( const LicenseEntry& entry : entriesList )
     {
-        m_allLicensesOptional = !required;
+        LicenseWidget* w = new LicenseWidget( entry );
+        ui->licenseEntriesLayout->addWidget( w );
+        m_entries.append( w );
     }
+    ui->licenseEntriesLayout->addStretch();
 
-    checkAcceptance( false );
+    CALAMARES_RETRANSLATE_SLOT( &LicensePage::retranslate )
+}
 
-    CALAMARES_RETRANSLATE( if ( required ) {
+void
+LicensePage::retranslate()
+{
+    if ( !m_allLicensesOptional )
+    {
         ui->mainText->setText( tr( "<h1>License Agreement</h1>"
                                    "This setup procedure will install proprietary "
                                    "software that is subject to licensing terms." ) );
         ui->additionalText->setText( tr( "Please review the End User License "
                                          "Agreements (EULAs) above.<br/>"
                                          "If you do not agree with the terms, the setup procedure cannot continue." ) );
-    } else {
+    }
+    else
+    {
         ui->mainText->setText( tr( "<h1>License Agreement</h1>"
                                    "This setup procedure can install proprietary "
                                    "software that is subject to licensing terms "
@@ -164,18 +172,13 @@ LicensePage::setEntries( const QList< LicenseEntry >& entriesList )
                                          "Agreements (EULAs) above.<br/>"
                                          "If you do not agree with the terms, proprietary software will not "
                                          "be installed, and open source alternatives will be used instead." ) );
-    } ui->retranslateUi( this );
-
-                           for ( const auto& w
-                                 : m_entries ) w->retranslateUi(); )
+    }
+    ui->retranslateUi( this );
 
-    for ( const LicenseEntry& entry : entriesList )
+    for ( const auto& w : m_entries )
     {
-        LicenseWidget* w = new LicenseWidget( entry );
-        ui->licenseEntriesLayout->addWidget( w );
-        m_entries.append( w );
+        w->retranslateUi();
     }
-    ui->licenseEntriesLayout->addStretch();
 }
 
 

src/modules/license/LicensePage.h

@@ -83,10 +83,13 @@ public slots:
      *  - the user has ticked the "OK" box.
      * This function calls updateGlobalStorage() as needed, and updates
      * the appearance of the page as needed. @p checked indicates whether
-     * the checkbox has been ticked or not.
+     * the checkbox has been ticked or not. (e.g. when @p checked is true,
+     * you can continue regardless)
      */
     void checkAcceptance( bool checked );
 
+    void retranslate();
+
 signals:
     void nextStatusChanged( bool status );