/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2012 Filip Wieladek <wattos@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/

#ifndef KWIN_MOUSECLICK_H
#define KWIN_MOUSECLICK_H

#include <kwineffects.h>
#include <kwinglutils.h>
#include <kwinxrenderutils.h>
#include <KLocalizedString>

namespace KWin
{

#define BUTTON_COUNT 3

class MouseEvent
{
public:
    int m_button;
    QPoint m_pos;
    int m_time;
    EffectFrame* m_frame;
    bool m_press;
public:
    MouseEvent(int button, QPoint point, int time, EffectFrame* frame, bool press)
        : m_button(button),
          m_pos(point),
          m_time(time),
          m_frame(frame),
          m_press(press)
    {};

    ~MouseEvent()
    {
        delete m_frame;
    }
};

class MouseButton
{
public:
    QString m_labelUp;
    QString m_labelDown;
    Qt::MouseButtons m_button;
    bool m_isPressed;
    int m_time;
public:
    MouseButton(QString label, Qt::MouseButtons button)
        : m_labelUp(label),
          m_labelDown(label),
          m_button(button),
          m_isPressed(false),
          m_time(0)
    {
        m_labelDown.append(i18n("↓"));
        m_labelUp.append(i18n("↑"));
    };

    inline void setPressed(bool pressed)
    {
        if (m_isPressed != pressed) {
            m_isPressed = pressed;
            if (pressed)
                m_time = 0;
        }
    }
};

class MouseClickEffect
    : public Effect
{
    Q_OBJECT
public:
    MouseClickEffect();
    ~MouseClickEffect();
    virtual void reconfigure(ReconfigureFlags);
    virtual void prePaintScreen(ScreenPrePaintData& data, int time);
    virtual void paintScreen(int mask, QRegion region, ScreenPaintData& data);
    virtual void postPaintScreen();
    virtual bool isActive() const;

    static bool supported();
private slots:
    void toggleEnabled();
    void slotMouseChanged(const QPoint& pos, const QPoint& old,
                          Qt::MouseButtons buttons, Qt::MouseButtons oldbuttons,
                          Qt::KeyboardModifiers modifiers, Qt::KeyboardModifiers oldmodifiers);
private:
    EffectFrame* createEffectFrame(const QPoint& pos, const QString& text);
    inline void drawCircle(const QColor& color, float cx, float cy, float r);
    inline void paintScreenSetup(int mask, QRegion region, ScreenPaintData& data);
    inline void paintScreenFinish(int mask, QRegion region, ScreenPaintData& data);

    inline bool isReleased(Qt::MouseButtons button, Qt::MouseButtons buttons, Qt::MouseButtons oldButtons);
    inline bool isPressed(Qt::MouseButtons button, Qt::MouseButtons buttons, Qt::MouseButtons oldButtons);

    inline float computeRadius(const MouseEvent* click, int ring);
    inline float computeAlpha(const MouseEvent* click, int ring);

    void repaint();

    void drawCircleGl(const QColor& color, float cx, float cy, float r);
    void paintScreenSetupGl(int mask, QRegion region, ScreenPaintData& data);
    void paintScreenFinishGl(int mask, QRegion region, ScreenPaintData& data);

    QColor m_colors[BUTTON_COUNT];
    int m_ringCount;
    float m_lineWidth;
    float m_ringLife;
    float m_ringMaxSize;
    bool m_showText;
    QFont m_font;

    QList<MouseEvent*> m_clicks;
    MouseButton* m_buttons[BUTTON_COUNT];

    bool m_enabled;

};

} // namespace

#endif