fix: Can't input Chinese when opening the launcher

Create an InputEventItem object to forward the input events of the input method.

Issue: linuxdeepin/developer-center#8469

CMakeLists.txt

@@ -55,6 +55,7 @@ set(SOURCE_FILES
     desktopintegration.cpp desktopintegration.h
     launchercontroller.cpp launchercontroller.h
     debughelper.cpp debughelper.h
+    inputeventitem.h inputeventitem.cpp
 )
 
 set(QML_FILES

inputeventitem.cpp

@@ -0,0 +1,19 @@
+// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+#include "inputeventitem.h"
+
+InputEventItem::InputEventItem()
+{
+    qApp->installEventFilter(this);
+}
+
+bool InputEventItem::eventFilter(QObject *obj, QEvent *event) {
+    if (event->type() == QEvent::InputMethod && (this->children().contains(obj) || obj == this)) {
+        QInputMethodEvent *inputMethodEvent = static_cast<QInputMethodEvent *>(event);
+        qDebug() << "InputEventItem::eventFilter: " << inputMethodEvent->commitString();
+        if (!inputMethodEvent->commitString().isEmpty())
+            Q_EMIT inputReceived(inputMethodEvent->commitString());
+    }
+    return QObject::eventFilter(obj, event);
+}

inputeventitem.h

@@ -0,0 +1,25 @@
+// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+#ifndef INPUTEVENTITEM_H
+#define INPUTEVENTITEM_H
+
+#include <QObject>
+#include <QQmlEngine>
+#include <QQuickItem>
+
+class InputEventItem : public QQuickItem
+{
+    Q_OBJECT
+    QML_ELEMENT
+public:
+    InputEventItem();
+
+protected:
+    bool eventFilter(QObject *obj, QEvent *event) override;
+
+signals:
+    void inputReceived(const QString &input);
+};
+
+#endif // INPUTEVENTITEM_H