Update toolbar style sheet when theme changed

apps/launcher/maindialog.cpp

@@ -22,6 +22,11 @@
 #include "importpage.hpp"
 #include "settingspage.hpp"
 
+namespace
+{
+    constexpr const char* toolBarStyle = "QToolBar { border: 0px; } QToolButton { min-width: 70px }";
+}
+
 using namespace Process;
 
 void cfgError(const QString& title, const QString& msg)
@@ -73,6 +78,7 @@ Launcher::MainDialog::MainDialog(const Files::ConfigurationManager& configuratio
     QLabel* logo = new QLabel(this);
     logo->setPixmap(QIcon(":/images/openmw-header.png").pixmap(QSize(294, 64)));
     toolBar->addWidget(logo);
+    toolBar->setStyleSheet(toolBarStyle);
 }
 
 Launcher::MainDialog::~MainDialog()
@@ -81,6 +87,18 @@ Launcher::MainDialog::~MainDialog()
     delete mWizardInvoker;
 }
 
+bool Launcher::MainDialog::event(QEvent* event)
+{
+    // Apply style sheet again if style was changed
+    if (event->type() == QEvent::ThemeChange || event->type() == QEvent::PaletteChange)
+    {
+        if (toolBar != nullptr)
+            toolBar->setStyleSheet(toolBarStyle);
+    }
+
+    return QMainWindow::event(event);
+}
+
 void Launcher::MainDialog::createIcons()
 {
     if (!QIcon::hasThemeIcon("document-new"))

apps/launcher/maindialog.hpp

@@ -60,6 +60,9 @@ namespace Launcher
         void play();
         void help();
 
+    protected:
+        bool event(QEvent* event) override;
+
     private slots:
         void wizardStarted();
         void wizardFinished(int exitCode, QProcess::ExitStatus exitStatus);

apps/launcher/ui/mainwindow.ui

@@ -75,16 +75,6 @@
    <property name="layoutDirection">
     <enum>Qt::LeftToRight</enum>
    </property>
-   <property name="styleSheet">
-    <string notr="true">QToolBar {
-	border: 0px;
-}
-
-QToolButton {
-	min-width: 70px;
-}
-</string>
-   </property>
    <property name="movable">
     <bool>false</bool>
    </property>