Don't let the user modify static IPv4 addresses unless IPv4 mode is Manual

ipv4settingstab.cpp

@@ -7,6 +7,7 @@ Ipv4SettingsTab::Ipv4SettingsTab(QWidget *parent) :
 {
     ui->setupUi(this);
     ui->methodComboBox->addItems(QStringList() << tr("Automatic") << tr("Automatic (address-only)") << tr("Link-Local") << tr("Manual") << tr("Shared to other computers") << tr("Disabled"));
+    connect(ui->methodComboBox, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &Ipv4SettingsTab::onMethodComboBoxCurrentIndexChanged);
     connect(ui->editDnsServersButton, &QPushButton::clicked, this, &Ipv4SettingsTab::onEditDnsServersButtonClicked);
     connect(ui->editSearchDomainsButton, &QPushButton::clicked, this, &Ipv4SettingsTab::onEditSearchDomainsButtonClicked);
     connect(ui->manualIpv4ConfigurationAddButton, &QPushButton::clicked, this, &Ipv4SettingsTab::onManualIpv4ConfigurationAddButtonClicked);
@@ -84,6 +85,8 @@ void Ipv4SettingsTab::loadSettings(QVariantMap settings)
         }
     }
 
+    onMethodComboBoxCurrentIndexChanged(ui->methodComboBox->currentIndex());
+
     if (settings["ipv4DnsServers"].isValid()) {
         ui->dnsServersLineEdit->setText(settings["ipv4DnsServers"].toString());
     }
@@ -112,6 +115,15 @@ void Ipv4SettingsTab::loadSettings(QVariantMap settings)
     }
 }
 
+void Ipv4SettingsTab::onMethodComboBoxCurrentIndexChanged(int index)
+{
+    if (index == 3) { // manual
+        ui->manualIpv4ConfigurationTable->setEnabled(true);
+    } else {
+        ui->manualIpv4ConfigurationTable->setEnabled(false);
+    }
+}
+
 void Ipv4SettingsTab::onEditDnsServersButtonClicked()
 {
     ListEditorDialog led(this, ui->dnsServersLineEdit->text(), ',');

ipv4settingstab.h

@@ -26,6 +26,7 @@ private slots:
     void onEditSearchDomainsButtonClicked();
     void onManualIpv4ConfigurationAddButtonClicked();
     void onManualIpv4ConfigurationRemoveButtonClicked();
+    void onMethodComboBoxCurrentIndexChanged(int index);
 
 private:
     Ui::Ipv4SettingsTab *ui;