/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (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 http://qt.nokia.com/contact.
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#ifndef FANCYTABWIDGET_H
#define FANCYTABWIDGET_H

#include <QtGui/QIcon>
#include <QtGui/QWidget>

#include <QtCore/QTimer>
#include <QtCore/QPropertyAnimation>

QT_BEGIN_NAMESPACE
class QPainter;
class QStackedLayout;
class QStatusBar;
QT_END_NAMESPACE

namespace Core {
namespace Internal {

class FancyTab : public QWidget{
    Q_OBJECT

    Q_PROPERTY(float fader READ fader WRITE setFader)
public:
    FancyTab(QWidget *tabbar);
    float fader() { return m_fader; }
    void setFader(float value);

    QSize sizeHint() const;

    void fadeIn();
    void fadeOut();

    QIcon icon;
    QString text;
    QString toolTip;
    bool enabled;

private:
    QPropertyAnimation animator;
    QWidget *tabbar;
    float m_fader;
};

class FancyTabBar : public QWidget
{
    Q_OBJECT

public:
    FancyTabBar(QWidget *parent = 0);
    ~FancyTabBar();

    bool event(QEvent *event);

    void paintEvent(QPaintEvent *event);
    void paintTab(QPainter *painter, int tabIndex) const;
    void mousePressEvent(QMouseEvent *);
    void mouseMoveEvent(QMouseEvent *);
    void enterEvent(QEvent *);
    void leaveEvent(QEvent *);
    bool validIndex(int index) const { return index >= 0 && index < m_tabs.count(); }

    QSize sizeHint() const;
    QSize minimumSizeHint() const;

    void setTabEnabled(int index, bool enable);
    bool isTabEnabled(int index) const;

    void addTab(const QIcon &icon, const QString &label);
    void addSpacer(int size = 40);
    void setEnabled(int index, bool enabled);
    void removeTab(int index) {
        FancyTab *tab = m_tabs.takeAt(index);
        delete tab;
    }
    void setCurrentIndex(int index);
    int currentIndex() const { return m_currentIndex; }

    void setTabToolTip(int index, QString toolTip) { m_tabs[index]->toolTip = toolTip; }
    QString tabToolTip(int index) const { return m_tabs.at(index)->toolTip; }

    QIcon tabIcon(int index) const {return m_tabs.at(index)->icon; }
    QString tabText(int index) const { return m_tabs.at(index)->text; }
    int count() const {return m_tabs.count(); }
    QRect tabRect(int index) const;

signals:
    void currentChanged(int);

public slots:
    void emitCurrentIndex();

private:
    static const int m_rounding;
    static const int m_textPadding;
    QRect m_hoverRect;
    int m_hoverIndex;
    int m_currentIndex;
    QList<FancyTab*> m_tabs;
    QTimer m_triggerTimer;
    QSize tabSizeHint(bool minimum = false) const;

};

class FancyTabWidget : public QWidget
{
    Q_OBJECT

public:
    FancyTabWidget(QWidget *parent = 0);

    void addTab(QWidget *tab, const QIcon &icon, const QString &label);
    void addSpacer(int size = 40);
    void removeTab(int index);
    void setBackgroundPixmap(const QPixmap& pixmap);
    void addCornerWidget(QWidget *widget);
    void insertCornerWidget(int pos, QWidget *widget);
    int cornerWidgetCount() const;
    void setTabToolTip(int index, const QString &toolTip);
    int count() const { return m_tabBar->count(); }

    void paintEvent(QPaintEvent *event);

    int currentIndex() const;
    QStatusBar *statusBar() const;

    void setTabEnabled(int index, bool enable);
    bool isTabEnabled(int index) const;

signals:
    void currentAboutToShow(int index);
    void currentChanged(int index);

public slots:
    void setCurrentIndex(int index);

private slots:
    void showWidget(int index);

private:
    FancyTabBar *m_tabBar;
    QWidget *m_cornerWidgetContainer;
    QStackedLayout *m_modesStack;
    QWidget *m_selectionWidget;
    QStatusBar *m_statusBar;
    QPixmap m_backgroundPixmap;
};

} // namespace Internal
} // namespace Core

using Core::Internal::FancyTab;
using Core::Internal::FancyTabBar;
using Core::Internal::FancyTabWidget;

#endif // FANCYTABWIDGET_H