Dynamically change the status bar color depending on the current screen (#11672)

* Revert (https://github.com/keepassxreboot/keepassxc/pull/11455)
* Do not use styles for QStatusBar
* Dynamically change the status bar color depending on the current screen

src/gui/MainWindow.cpp

@@ -726,11 +726,6 @@ MainWindow::MainWindow()
 
     restoreConfigState();
     updateMenuActionState();
-
-    // Check the current screen and hide the status bar if it is the WelcomeScreen
-    if (m_ui->stackedWidget->currentIndex() == WelcomeScreen) {
-        statusBar()->hide();
-    }
 }
 
 MainWindow::~MainWindow()
@@ -1235,10 +1230,10 @@ void MainWindow::switchToDatabases()
 {
     if (m_ui->tabWidget->currentIndex() == -1) {
         m_ui->stackedWidget->setCurrentIndex(WelcomeScreen);
-        statusBar()->hide();
+        statusBar()->setAutoFillBackground(false);
     } else {
         m_ui->stackedWidget->setCurrentIndex(DatabaseTabScreen);
-        statusBar()->show();
+        statusBar()->setAutoFillBackground(true);
     }
 }
 
@@ -1247,6 +1242,7 @@ void MainWindow::switchToSettings(bool enabled)
     if (enabled) {
         m_ui->settingsWidget->loadSettings();
         m_ui->stackedWidget->setCurrentIndex(SettingsScreen);
+        statusBar()->setAutoFillBackground(true);
     } else {
         switchToDatabases();
     }
@@ -1258,6 +1254,7 @@ void MainWindow::togglePasswordGenerator(bool enabled)
         m_ui->passwordGeneratorWidget->loadSettings();
         m_ui->passwordGeneratorWidget->regeneratePassword();
         m_ui->stackedWidget->setCurrentIndex(PasswordGeneratorScreen);
+        statusBar()->setAutoFillBackground(false);
     } else {
         m_ui->passwordGeneratorWidget->saveSettings();
         switchToDatabases();
@@ -1326,10 +1323,10 @@ void MainWindow::databaseTabChanged(int tabIndex)
 {
     if (tabIndex != -1 && m_ui->stackedWidget->currentIndex() == WelcomeScreen) {
         m_ui->stackedWidget->setCurrentIndex(DatabaseTabScreen);
-        statusBar()->show();
+        statusBar()->setAutoFillBackground(true);
     } else if (tabIndex == -1 && m_ui->stackedWidget->currentIndex() == DatabaseTabScreen) {
         m_ui->stackedWidget->setCurrentIndex(WelcomeScreen);
-        statusBar()->hide();
+        statusBar()->setAutoFillBackground(false);
     }
 
     m_actionMultiplexer.setCurrentObject(m_ui->tabWidget->currentDatabaseWidget());

src/gui/styles/base/basestyle.qss

@@ -72,10 +72,6 @@ QPlainTextEdit, QTextEdit {
     padding-left: 4px;
 }
 
-QStatusBar {
-    background-color: palette(window);
-}
-
 *[title="true"] {
     font-weight: bold;
 }

src/gui/styles/dark/DarkStyle.cpp

@@ -115,7 +115,7 @@ QString DarkStyle::getAppStyleSheet() const
 void DarkStyle::polish(QWidget* widget)
 {
     if (qobject_cast<QMainWindow*>(widget) || qobject_cast<QDialog*>(widget) || qobject_cast<QMenuBar*>(widget)
-        || qobject_cast<QToolBar*>(widget) || qobject_cast<QStatusBar*>(widget)) {
+        || qobject_cast<QToolBar*>(widget)) {
         auto palette = widget->palette();
 #if defined(Q_OS_MACOS)
         if (!osUtils->isDarkMode()) {

src/gui/styles/dark/darkstyle.qss

@@ -1,12 +1,12 @@
 DatabaseWidget:!active,
 DatabaseWidget #groupView:!active, DatabaseWidget #tagView:!active,
-EntryPreviewWidget *:!active[blendIn="true"], QStatusBar:!active {
+EntryPreviewWidget *:!active[blendIn="true"] {
     background-color: #404042;
 }
 
 DatabaseWidget:disabled,
 DatabaseWidget #groupView:disabled, DatabaseWidget #tagView:disabled,
-EntryPreviewWidget *:disabled[blendIn="true"], QStatusBar:disabled {
+EntryPreviewWidget *:disabled[blendIn="true"] {
     background-color: #424242;
 }
 

src/gui/styles/light/LightStyle.cpp

@@ -115,7 +115,7 @@ QString LightStyle::getAppStyleSheet() const
 void LightStyle::polish(QWidget* widget)
 {
     if (qobject_cast<QMainWindow*>(widget) || qobject_cast<QDialog*>(widget) || qobject_cast<QMenuBar*>(widget)
-        || qobject_cast<QToolBar*>(widget) || qobject_cast<QStatusBar*>(widget)) {
+        || qobject_cast<QToolBar*>(widget)) {
         auto palette = widget->palette();
 #if defined(Q_OS_MACOS)
         if (osUtils->isDarkMode()) {

src/gui/styles/light/lightstyle.qss

@@ -1,12 +1,12 @@
 DatabaseWidget:!active,
 DatabaseWidget #groupView:!active, DatabaseWidget #tagView:!active,
-EntryPreviewWidget *:!active[blendIn="true"], QStatusBar:!active {
+EntryPreviewWidget *:!active[blendIn="true"] {
     background-color: #FCFCFC;
 }
 
 DatabaseWidget:disabled,
 DatabaseWidget #groupView:disabled, DatabaseWidget #tagView:disabled,
-EntryPreviewWidget *:disabled[blendIn="true"], QStatusBar:disabled {
+EntryPreviewWidget *:disabled[blendIn="true"] {
     background-color: #EDEDED;
 }