Fixed dead keys in photo / file caption input field #1418

Another attempt to fix dead keys input problem after main
window looses focus to popup menu or photo viewer #2007 #1074

Telegram/SourceFiles/mainwindow.cpp

@@ -926,13 +926,26 @@ void MainWindow::layerHidden() {
 	setInnerFocus();
 }
 
+void MainWindow::onReActivate() {
+	if (auto w = App::wnd()) {
+		if (auto f = QApplication::focusWidget()) {
+			f->clearFocus();
+		}
+		w->windowHandle()->requestActivate();
+		w->activate();
+		if (auto f = QApplication::focusWidget()) {
+			f->clearFocus();
+		}
+		w->setInnerFocus();
+    }
+}
+
 void MainWindow::hideMediaview() {
     if (_mediaView && !_mediaView->isHidden()) {
         _mediaView->hide();
 #if defined Q_OS_LINUX32 || defined Q_OS_LINUX64
-        if (App::wnd()) {
-            App::wnd()->activateWindow();
-        }
+		onReActivate();
+		QTimer::singleShot(200, this, SLOT(onReActivate()));
 #endif
     }
 }

Telegram/SourceFiles/mainwindow.h

@@ -282,6 +282,8 @@ public slots:
 	void onLogoutSure();
 	void updateGlobalMenu(); // for OS X top menu
 
+	void onReActivate();
+
 	void notifyUpdateAllPhotos();
 
 	void app_activateClickHandler(ClickHandlerPtr handler, Qt::MouseButton button);

Telegram/SourceFiles/ui/flatinput.cpp

@@ -765,11 +765,11 @@ void InputArea::startBorderAnimation() {
 }
 
 void InputArea::focusInEvent(QFocusEvent *e) {
-	_inner.setFocus();
+	QTimer::singleShot(0, &_inner, SLOT(setFocus()));
 }
 
 void InputArea::mousePressEvent(QMouseEvent *e) {
-	_inner.setFocus();
+	QTimer::singleShot(0, &_inner, SLOT(setFocus()));
 }
 
 void InputArea::contextMenuEvent(QContextMenuEvent *e) {
@@ -1457,11 +1457,11 @@ void InputField::startBorderAnimation() {
 }
 
 void InputField::focusInEvent(QFocusEvent *e) {
-	_inner.setFocus();
+	QTimer::singleShot(0, &_inner, SLOT(setFocus()));
 }
 
 void InputField::mousePressEvent(QMouseEvent *e) {
-	_inner.setFocus();
+	QTimer::singleShot(0, &_inner, SLOT(setFocus()));
 }
 
 void InputField::contextMenuEvent(QContextMenuEvent *e) {

Telegram/SourceFiles/ui/flatinput.h

@@ -235,6 +235,12 @@ public:
 	bool hasFocus() const {
 		return _inner.hasFocus();
 	}
+	void setFocus() {
+		_inner.setFocus();
+	}
+	void clearFocus() {
+		_inner.clearFocus();
+	}
 
 public slots:
 

Telegram/SourceFiles/ui/popupmenu.cpp

@@ -521,8 +521,9 @@ PopupMenu::~PopupMenu() {
 	clearActions(true);
 	delete _menu;
 #if defined Q_OS_LINUX32 || defined Q_OS_LINUX64
-	if (App::wnd()) {
-		App::wnd()->activateWindow();
+	if (auto w = App::wnd()) {
+		w->onReActivate();
+		QTimer::singleShot(200, w, SLOT(onReActivate()));
 	}
 #endif
 }