/**************************************************************************
**
** This file is adapted from fancytabwidget.h which is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU General Public License Usage
**
** This file may be used under the terms of the GNU General Public
** License version 2 as published by the Free Software Foundation and
** appearing in the file COPYING included in the packaging of this file.
** Please review the following information to ensure the GNU General
** Public License version 2 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/gpl-2.0.html.
**
**************************************************************************/

#ifndef MTX_MKVTOOLNIX_GUI_UTIL_FANCY_TAB_WIDGET_H
#define MTX_MKVTOOLNIX_GUI_UTIL_FANCY_TAB_WIDGET_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

class FancyTab : public QObject
{
    Q_OBJECT

    Q_PROPERTY(float fader READ fader WRITE setFader)
public:
    FancyTab(QWidget *tabbar) : enabled(false), tabbar(tabbar), m_fader(0) {
        animator.setPropertyName("fader");
        animator.setTargetObject(this);
    }
    float fader() { return m_fader; }
    void setFader(float value);

    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 insertTab(int index, const QIcon &icon, const QString &label) {
        FancyTab *tab = new FancyTab(this);
        tab->icon = icon;
        tab->text = label;
        m_tabs.insert(index, tab);
    }
    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 insertTab(int index, QWidget *tab, const QIcon &icon, const QString &label);
    void removeTab(int index);
    void setBackgroundBrush(const QBrush &brush);
    void addCornerWidget(QWidget *widget);
    void insertCornerWidget(int pos, QWidget *widget);
    int cornerWidgetCount() const;
    void setTabToolTip(int index, const QString &toolTip);

    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;
};

#endif // MTX_MKVTOOLNIX_GUI_UTIL_FANCY_TAB_WIDGET_H
