GUI/OptionsDialog: update invalid qvalidatedlineedit widget's invalid colors properly during theme change

Author: bigshiny90

src/qt/optionsdialog.cpp

@@ -1202,11 +1202,13 @@ void OptionsDialog::on_showTrayIcon_stateChanged(int state)
 
 void OptionsDialog::changeEvent(QEvent* e)
 {
+    // First let the base class update all child widget palettes
+    // required for qvalidatedlineedit invalid colors to update properly
+    QWidget::changeEvent(e);
     if (e->type() == QEvent::PaletteChange) {
+        // Then update theme colors with the new palette
         updateThemeColors();
     }
-
-    QWidget::changeEvent(e);
 }
 
 bool OptionsDialog::eventFilter(QObject *object, QEvent *event)
@@ -1331,6 +1333,13 @@ void OptionsDialog::updateThemeColors()
         const QColor networkport_warning = networkport_dark ? QColor("#FF8080") : QColor("#FF0000");
         ui->networkPort->setStyleSheet(QStringLiteral("color: %1;").arg(networkport_warning.name()));
     }
+    // Re-trigger validation on all qvalidatedlineedit input fields to update their styling
+    // including background and text color
+    // Use setText to trigger validation
+    if (!ui->proxyIp->isValid()) ui->proxyIp->setText(ui->proxyIp->text());
+    if (!ui->proxyPort->isValid()) ui->proxyPort->setText(ui->proxyPort->text());
+    if (!ui->proxyIpTor->isValid()) ui->proxyIpTor->setText(ui->proxyIpTor->text());
+    if (!ui->proxyPortTor->isValid()) ui->proxyPortTor->setText(ui->proxyPortTor->text());
 }
 
 ProxyAddressValidator::ProxyAddressValidator(QObject *parent) :