qwasmwindowtreenode.h

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// 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();
    void shutdown();
 
    const QWasmWindowStack &childStack() const { return m_childStack; }
    QWasmWindow *activeChild() const { return m_activeChild; }
 
    uint64_t getActiveIndex() const {
        return m_activeIndex;
    }
 
private:
    void onTopWindowChanged();
    void setActiveChildNode(QWasmWindow *activeChild);
 
    uint64_t m_activeIndex = 0;
    static uint64_t s_nextActiveIndex;
 
    QWasmWindowStack m_childStack;
    QWasmWindow *m_activeChild = nullptr;
};
 
#endif // QWASMWINDOWTREENODE_H