Revert "Revert "Remove deprecated screen maintenance functions in QPlatformIntegration""

This reverts commit 300940a6c9eb0f74cefda7d76a5d19f56ec50253.

The fixes for leaf modules landed already.

Task-number: QTBUG-74816
Change-Id: I1c7f0705c20d030419ceedca485106af73946b3c
Reviewed-by: Jesus Fernandez <Jesus.Fernandez@qt.io>

src/gui/kernel/qplatformintegration.cpp

@@ -462,44 +462,6 @@ QList<int> QPlatformIntegration::possibleKeys(const QKeyEvent *) const
     return QList<int>();
 }
 
-/*!
-  \deprecated Use QWindowSystemInterface::handleScreenAdded instead.
-*/
-void QPlatformIntegration::screenAdded(QPlatformScreen *ps, bool isPrimary)
-{
-    QWindowSystemInterface::handleScreenAdded(ps, isPrimary);
-}
-
-/*!
-  \deprecated Use QWindowSystemInterface::handleScreenRemoved instead.
-*/
-void QPlatformIntegration::removeScreen(QScreen *screen)
-{
-    const bool wasPrimary = (!QGuiApplicationPrivate::screen_list.isEmpty() && QGuiApplicationPrivate::screen_list.at(0) == screen);
-    QGuiApplicationPrivate::screen_list.removeOne(screen);
-
-    QGuiApplicationPrivate::resetCachedDevicePixelRatio();
-
-    if (wasPrimary && qGuiApp && !QGuiApplicationPrivate::screen_list.isEmpty())
-        emit qGuiApp->primaryScreenChanged(QGuiApplicationPrivate::screen_list.at(0));
-}
-
-/*!
-  \deprecated Use QWindowSystemInterface::handleScreenRemoved instead.
-*/
-void QPlatformIntegration::destroyScreen(QPlatformScreen *platformScreen)
-{
-    QWindowSystemInterface::handleScreenRemoved(platformScreen);
-}
-
-/*!
-  \deprecated Use QWindowSystemInterface::handlePrimaryScreenChanged instead.
-*/
-void QPlatformIntegration::setPrimaryScreen(QPlatformScreen *newPrimary)
-{
-    QWindowSystemInterface::handlePrimaryScreenChanged(newPrimary);
-}
-
 QStringList QPlatformIntegration::themeNames() const
 {
     return QStringList();

src/gui/kernel/qplatformintegration.h

@@ -192,10 +192,6 @@ public:
 #endif
     virtual void setApplicationIcon(const QIcon &icon) const;
 
-#if QT_DEPRECATED_SINCE(5, 12)
-    QT_DEPRECATED_X("Use QWindowSystemInterface::handleScreenRemoved") void removeScreen(QScreen *screen);
-#endif
-
     virtual void beep() const;
 
 #if QT_CONFIG(vulkan) || defined(Q_CLANG_QDOC)
@@ -204,12 +200,6 @@ public:
 
 protected:
     QPlatformIntegration() = default;
-
-#if QT_DEPRECATED_SINCE(5, 12)
-    QT_DEPRECATED_X("Use QWindowSystemInterface::handleScreenAdded") void screenAdded(QPlatformScreen *screen, bool isPrimary = false);
-    QT_DEPRECATED_X("Use QWindowSystemInterface::handleScreenRemoved") void destroyScreen(QPlatformScreen *screen);
-    QT_DEPRECATED_X("Use QWindowSystemInterface::handlePrimaryScreenChanged") void setPrimaryScreen(QPlatformScreen *newPrimary);
-#endif
 };
 
 QT_END_NAMESPACE

src/gui/kernel/qplatformscreen.cpp

@@ -62,10 +62,6 @@ QPlatformScreen::~QPlatformScreen()
     Q_D(QPlatformScreen);
     if (d->screen) {
         qWarning("Manually deleting a QPlatformScreen. Call QWindowSystemInterface::handleScreenRemoved instead.");
-QT_WARNING_PUSH
-QT_WARNING_DISABLE_DEPRECATED
-        QGuiApplicationPrivate::platformIntegration()->removeScreen(d->screen);
-QT_WARNING_POP
         delete d->screen;
     }
 }

src/gui/kernel/qscreen.cpp

@@ -106,9 +106,18 @@ void QScreenPrivate::setPlatformScreen(QPlatformScreen *screen)
  */
 QScreen::~QScreen()
 {
-    if (!qApp)
+    // Remove screen
+    const bool wasPrimary = QGuiApplication::primaryScreen() == this;
+    QGuiApplicationPrivate::screen_list.removeOne(this);
+    QGuiApplicationPrivate::resetCachedDevicePixelRatio();
+
+    if (!qGuiApp)
         return;
 
+    QScreen *newPrimaryScreen = QGuiApplication::primaryScreen();
+    if (wasPrimary && newPrimaryScreen)
+        emit qGuiApp->primaryScreenChanged(newPrimaryScreen);
+
     // Allow clients to manage windows that are affected by the screen going
     // away, before we fall back to moving them to the primary screen.
     emit qApp->screenRemoved(this);
@@ -116,11 +125,8 @@ QScreen::~QScreen()
     if (QGuiApplication::closingDown())
         return;
 
-    QScreen *primaryScreen = QGuiApplication::primaryScreen();
+    bool movingFromVirtualSibling = newPrimaryScreen
-    if (this == primaryScreen)
+        && newPrimaryScreen->handle()->virtualSiblings().contains(handle());
-        return;
-
-    bool movingFromVirtualSibling = primaryScreen && primaryScreen->handle()->virtualSiblings().contains(handle());
 
     // Move any leftover windows to the primary screen
     const auto allWindows = QGuiApplication::allWindows();
@@ -129,7 +135,7 @@ QScreen::~QScreen()
             continue;
 
         const bool wasVisible = window->isVisible();
-        window->setScreen(primaryScreen);
+        window->setScreen(newPrimaryScreen);
 
         // Re-show window if moved from a virtual sibling screen. Otherwise
         // leave it up to the application developer to show the window.

src/gui/kernel/qwindowsysteminterface.cpp

@@ -818,11 +818,6 @@ void QWindowSystemInterface::handleScreenAdded(QPlatformScreen *ps, bool isPrima
 */
 void QWindowSystemInterface::handleScreenRemoved(QPlatformScreen *platformScreen)
 {
-QT_WARNING_PUSH
-QT_WARNING_DISABLE_DEPRECATED
-    QGuiApplicationPrivate::platformIntegration()->removeScreen(platformScreen->screen());
-QT_WARNING_POP
-
     // Important to keep this order since the QSceen doesn't own the platform screen
     delete platformScreen->screen();
     delete platformScreen;