1 files changed, 53 insertions, 0 deletions
diff --git a/src/plugins/platforms/wasm/qwasmwindowtreenode.h b/src/plugins/platforms/wasm/qwasmwindowtreenode.h
new file mode 100644
index 0000000000..344fdb43cb
--- /dev/null
+++ b/src/plugins/platforms/wasm/qwasmwindowtreenode.h
@@ -0,0 +1,53 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#ifndef QWASMWINDOWTREENODE_H
+#define QWASMWINDOWTREENODE_H
+
+#include "qwasmwindowstack.h"
+
+namespace emscripten {
+class val;
+}
+
+class QWasmWindow;
+
+enum class QWasmWindowTreeNodeChangeType {
+    NodeInsertion,
+    NodeRemoval,
+};
+
+class QWasmWindowTreeNode
+{
+public:
+    QWasmWindowTreeNode();
+    virtual ~QWasmWindowTreeNode();
+
+    virtual emscripten::val containerElement() = 0;
+    virtual QWasmWindowTreeNode *parentNode() = 0;
+
+protected:
+    virtual void onParentChanged(QWasmWindowTreeNode *previous, QWasmWindowTreeNode *current,
+                                 QWasmWindowStack::PositionPreference positionPreference);
+    virtual QWasmWindow *asWasmWindow();
+    virtual void onSubtreeChanged(QWasmWindowTreeNodeChangeType changeType,
+                                  QWasmWindowTreeNode *parent, QWasmWindow *child);
+    virtual void setWindowZOrder(QWasmWindow *window, int z);
+
+    void onPositionPreferenceChanged(QWasmWindowStack::PositionPreference positionPreference);
+    void setAsActiveNode();
+    void bringToTop();
+    void sendToBottom();
+
+    const QWasmWindowStack &childStack() const { return m_childStack; }
+    QWasmWindow *activeChild() const { return m_activeChild; }
+
+private:
+    void onTopWindowChanged();
+    void setActiveChildNode(QWasmWindow *activeChild);
+
+    QWasmWindowStack m_childStack;
+    QWasmWindow *m_activeChild = nullptr;
+};
+
+#endif // QWASMWINDOWTREENODE_H