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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact:  Qt Software Information (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
**
**************************************************************************/

#ifndef DESIGNER_EDITORWIDGET_H
#define DESIGNER_EDITORWIDGET_H

#include "designerconstants.h"

#include <coreplugin/minisplitter.h>

#include <QtCore/QPointer>
#include <QtCore/QList>
#include <QtCore/QVariant>
#include <QtGui/QWidget>

QT_BEGIN_NAMESPACE
class QTabWidget;
class QVBoxLayout;
QT_END_NAMESPACE

namespace Designer {
namespace Internal {

/* A widget that shares its embedded sub window with others. For example,
 * the designer editors need to share the widget box, etc. */
class SharedSubWindow : public QWidget
{
    Q_OBJECT
    Q_DISABLE_COPY(SharedSubWindow)

public:
    SharedSubWindow(QWidget *shared, QWidget *parent = 0);
    virtual ~SharedSubWindow();

public slots:
    // Takes the shared widget off the current parent and adds it to its
    // layout
    void activate();

private:
    QPointer <QWidget> m_shared;
    QVBoxLayout *m_layout;
};

/** State of the editor window (splitter sizes)
  * Shared as a global struct between the instances and stored
  * in QSettings. */
struct EditorWidgetState
{
    QVariant toVariant() const; // API to conveniently store in QSettings
    bool fromVariant(const QVariant &v);

    QList<int> horizontalSizes;
    QList<int> centerVerticalSizes;
    QList<int> rightVerticalSizes;
};

/* Form editor splitter used as editor window. Contains the shared designer
 * windows. */
class EditorWidget : public Core::MiniSplitter
{
    Q_OBJECT
    Q_DISABLE_COPY(EditorWidget)
public:
    explicit EditorWidget(QWidget *formWindow);

    virtual bool event(QEvent * e);

    EditorWidgetState save() const;
    bool restore(const EditorWidgetState &s);

    // Get/Set the shared splitter state of all editors of that type for
    // settings
    static EditorWidgetState state();
    static void setState(const EditorWidgetState&st);

public slots:
    void activate();
    void toolChanged(int);

private:
    void setInitialSizes();

    SharedSubWindow* m_designerSubWindows[Designer::Constants::DesignerSubWindowCount];
    QSplitter *m_centerVertSplitter;
    QTabWidget *m_bottomTab;
    QSplitter *m_rightVertSplitter;
};

} // namespace Internal
} // namespace Designer

#endif // DESIGNER_EDITORWIDGET_H