qt-creator/src/plugins/coreplugin/findplaceholder.h

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#ifndef FINDPLACEHOLDER_H
#define FINDPLACEHOLDER_H

#include "core_global.h"

#include <QPointer>
#include <QWidget>

namespace Core {

class CORE_EXPORT FindToolBarPlaceHolder : public QWidget
{
    Q_OBJECT
public:
    explicit FindToolBarPlaceHolder(QWidget *owner, QWidget *parent = 0);
    ~FindToolBarPlaceHolder();
    QWidget *owner() const;
    bool isUsedByWidget(QWidget *widget);

    void setWidget(QWidget *widget);

    static FindToolBarPlaceHolder *getCurrent();
    static void setCurrent(FindToolBarPlaceHolder *placeHolder);

private:
    QWidget *m_owner;
    QPointer<QWidget> m_subWidget;
    static FindToolBarPlaceHolder *m_current;
};

} // namespace Core

#endif // FINDPLACEHOLDER_H