Description: Make build against Qt5 possible
 The patch partially reverts upstream commit e5d8a1aa3c and adds the
 TWidget::setScreen() method to call to a private API freely available in Qt6.
Author: Nicholas Guriev <guriev-ns@ya.ru>
Last-Update: Fri, 22 Apr 2022 22:30:22 +0300

--- a/Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp
+++ b/Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp
@@ -499,7 +499,7 @@ void OverlayWidget::moveToScreen(bool in
 		DEBUG_LOG(("Viewer Pos: Currently on screen %1, moving to screen %2")
 			.arg(screenList.indexOf(myScreen))
 			.arg(screenList.indexOf(activeWindowScreen)));
-		_widget->setScreen(activeWindowScreen);
+		window()->setScreen(activeWindowScreen);
 		DEBUG_LOG(("Viewer Pos: New actual screen: %1")
 			.arg(screenList.indexOf(_widget->screen())));
 	}
--- a/Telegram/SourceFiles/media/view/media_view_pip.cpp
+++ b/Telegram/SourceFiles/media/view/media_view_pip.cpp
@@ -475,7 +475,7 @@ void PipPanel::setPositionDefault() {
 	const auto parentScreen = widgetScreen(_parent);
 	const auto myScreen = widgetScreen(widget());
 	if (parentScreen && myScreen && myScreen != parentScreen) {
-		widget()->setScreen(parentScreen);
+		widget()->windowHandle()->setScreen(parentScreen);
 	}
 	auto position = Position();
 	position.snapped = RectPart::Top | RectPart::Left;
--- a/Telegram/lib_ui/ui/rp_widget.cpp
+++ b/Telegram/lib_ui/ui/rp_widget.cpp
@@ -11,6 +11,8 @@
 #include <QtGui/QWindow>
 #include <QtGui/QtEvents>
 
+#include <private/qwidget_p.h>
+
 namespace Ui {
 namespace {
 
@@ -207,3 +209,12 @@ auto RpWidgetWrap::eventStreams() const
 }
 
 } // namespace Ui
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+
+bool TWidget::setScreen(QScreen *next) {
+	// This method becomes public in Qt6. So anyway reveal it right here.
+	return qt_widget_private(this)->setScreen(next);
+}
+
+#endif  // Qt < 6.0.0
--- a/Telegram/lib_ui/ui/rp_widget.h
+++ b/Telegram/lib_ui/ui/rp_widget.h
@@ -206,6 +206,10 @@ public:
 		return rectNoMargins().size();
 	}
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+	bool setScreen(QScreen*);
+#endif  // Qt < 6.0.0
+
 	// Updates the area that is visible inside the scroll container.
 	void setVisibleTopBottom(int visibleTop, int visibleBottom) {
 		auto max = height();