/****************************************************************************
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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** This file is part of the Qt Designer of the Qt Toolkit.
**
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** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
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** GPL_EXCEPTION.txt in this package.
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//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of Qt Designer.  This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//

#ifndef TEXTPROPERTYEDITOR_H
#define TEXTPROPERTYEDITOR_H

#include "shared_global_p.h"
#include "shared_enums_p.h"

#include <QtGui/QWidget>


namespace qdesigner_internal {

    class PropertyLineEdit;

    // Editor for text properties. Does escaping of newline characters
    // and provides validation modes. The interface corresponds to
    // that of QLineEdit.
    class QDESIGNER_SHARED_EXPORT TextPropertyEditor : public QWidget
    {
        TextPropertyEditor(const TextPropertyEditor &);
        TextPropertyEditor& operator=(const TextPropertyEditor &);
        Q_OBJECT
    public:
        enum EmbeddingMode {
            // Stand-alone widget
            EmbeddingNone,
                // Disable frame
                EmbeddingTreeView,
                // For editing in forms
                EmbeddingInPlace
        };

        TextPropertyEditor(EmbeddingMode embeddingMode = EmbeddingNone, TextPropertyValidationMode validationMode = ValidationMultiLine, QWidget *parent = 0);

        QString text() const;

        virtual QSize sizeHint () const;

        void setAlignment(Qt::Alignment alignment);

        // installs an event filter object on the private QLineEdit
        void installEventFilter(QObject *filterObject);

        // Replace newline characters by literal "\n" for inline editing
        // in mode ValidationMultiLine
        static QString stringToEditorString(const QString &s, TextPropertyValidationMode validationMode = ValidationMultiLine);

        // Replace literal "\n"  by actual new lines in mode ValidationMultiLine
        static QString editorStringToString(const QString &s, TextPropertyValidationMode validationMode = ValidationMultiLine);

        // Returns whether newline characters are valid in validationMode.
        static bool multiLine(TextPropertyValidationMode validationMode);

    signals:
        void textChanged(const QString &text);
        void editingFinished ();

    public slots:
        void setText(const QString &text);
        void selectAll();

    protected:
        void resizeEvent (QResizeEvent * event );

    private slots:
        void slotTextChanged(const QString &text);
    private:
        void setRegExpValidator(const QString &pattern);

        const TextPropertyValidationMode m_ValidationMode;
        PropertyLineEdit* m_lineEdit;

        // Cached text containing real newline characters.
        QString m_cachedText;
    };
}

#endif // TEXTPROPERTYEDITOR_H
