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

Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
Copyright (C) 2008 Lucas Murray <lmurray@undefinedfire.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_DESKTOPGRID_H
#define KWIN_DESKTOPGRID_H

#include <kwineffects.h>
#include <kshortcut.h>
#include <QObject>
#include <QtGui/QGraphicsView>

namespace Plasma
{
class PushButton;
}

namespace KWin
{

class PresentWindowsEffectProxy;

class DesktopButtonsView : public QGraphicsView
{
    Q_OBJECT
public:
    DesktopButtonsView(QWidget* parent = 0);
    void windowInputMouseEvent(QMouseEvent* e);
    void setAddDesktopEnabled(bool enable);
    void setRemoveDesktopEnabled(bool enable);
    virtual void drawBackground(QPainter* painter, const QRectF& rect);

Q_SIGNALS:
    void addDesktop();
    void removeDesktop();

private:
    Plasma::PushButton* m_addDesktopButton;
    Plasma::PushButton* m_removeDesktopButton;
    Plasma::FrameSvg* m_frame;
};

class DesktopGridEffect
    : public QObject, public Effect
{
    Q_OBJECT
public:
    DesktopGridEffect();
    ~DesktopGridEffect();
    virtual void reconfigure(ReconfigureFlags);
    virtual void prePaintScreen(ScreenPrePaintData& data, int time);
    virtual void paintScreen(int mask, QRegion region, ScreenPaintData& data);
    virtual void postPaintScreen();
    virtual void prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time);
    virtual void paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data);
    virtual void windowClosed(EffectWindow* w);
    virtual void windowDeleted(EffectWindow* w);
    virtual void windowAdded(EffectWindow* w);
    virtual void windowGeometryShapeChanged(EffectWindow* w, const QRect& old);
    virtual void windowInputMouseEvent(Window w, QEvent* e);
    virtual void grabbedKeyboardEvent(QKeyEvent* e);
    virtual bool borderActivated(ElectricBorder border);
    virtual void numberDesktopsChanged(int old);

    enum { LayoutPager, LayoutAutomatic, LayoutCustom }; // Layout modes

private slots:
    void toggle();
    // slots for global shortcut changed
    // needed to toggle the effect
    void globalShortcutChanged(const QKeySequence& seq);
    void slotAddDesktop();
    void slotRemoveDesktop();

private:
    QPointF scalePos(const QPoint& pos, int desktop, int screen = -1) const;
    QPoint unscalePos(const QPoint& pos, int* desktop = NULL) const;
    int posToDesktop(const QPoint& pos) const;
    EffectWindow* windowAt(QPoint pos) const;
    void setCurrentDesktop(int desktop);
    void setHighlightedDesktop(int desktop);
    int desktopToRight(int desktop, bool wrap = true) const;
    int desktopToLeft(int desktop, bool wrap = true) const;
    int desktopUp(int desktop, bool wrap = true) const;
    int desktopDown(int desktop, bool wrap = true) const;
    void setActive(bool active);
    void setup();
    void setupGrid();
    void finish();
    bool isMotionManagerMovingWindows();
    bool isUsingPresentWindows() const;
    QRectF moveGeometryToDesktop(int desktop) const;
    void desktopsAdded(int old);
    void desktopsRemoved(int old);

    QList<ElectricBorder> borderActivate;
    int zoomDuration;
    int border;
    Qt::Alignment desktopNameAlignment;
    int layoutMode;
    int customLayoutRows;

    bool activated;
    TimeLine timeline;
    int paintingDesktop;
    int highlightedDesktop;
    Window input;
    bool keyboardGrab;
    bool wasWindowMove, wasDesktopMove;
    EffectWindow* windowMove;
    QPoint windowMoveDiff;
    QPoint dragStartPos;

    // Soft highlighting
    QList<TimeLine> hoverTimeline;

    QList< EffectFrame* > desktopNames;

    QSize gridSize;
    Qt::Orientation orientation;
    QPoint activeCell;
    // Per screen variables
    QList<double> scale; // Because the border isn't a ratio each screen is different
    QList<double> unscaledBorder;
    QList<QSizeF> scaledSize;
    QList<QPointF> scaledOffset;

    // Shortcut - needed to toggle the effect
    KShortcut shortcut;

    PresentWindowsEffectProxy* m_proxy;
    QList<WindowMotionManager> m_managers;
    bool m_usePresentWindows;
    QRect m_windowMoveGeometry;
    QPoint m_windowMoveStartPoint;

    QHash< DesktopButtonsView*, EffectWindow* > m_desktopButtonsViews;

};

} // namespace

#endif