/*
    This file is part of KOrganizer.
    Copyright (c) 2000,2001 Cornelius Schumacher <schumacher@kde.org>

    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, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifndef _KOMONTHVIEW_H
#define _KOMONTHVIEW_H

#include <qlabel.h>
#include <qframe.h>
#include <qdatetime.h>
#include <qlistbox.h>
#include <qpoint.h>
#include <qwidgetstack.h>
#include <qlayout.h>
#include <qintdict.h>
#include <qpushbutton.h>
#include <qvaluelist.h>
#include <qptrvector.h>

#include <libkcal/calendar.h>
#include <libkcal/event.h>

#include "koeventview.h"

#ifdef DESKTOP_VERSION
class QToolTipGroup; 
#endif

class KNOWhatsThis; 
class KOWeekButton : public QPushButton
{
    Q_OBJECT
  public:
    KOWeekButton( QWidget *parent=0, const char *name=0 ) :
      QPushButton( parent, name) 
    {
      connect( this, SIGNAL( clicked() ),
               SLOT( bottonClicked() )); 
      mNumber = -1;
    }
    void setWeekNum ( int num ) {mNumber = num; setText( QString::number ( num ));}
    int getWeekNum() { return mNumber;}
    signals:
    void selectWeekNum ( int );
private:
    int mNumber;
private slots :
    void bottonClicked() { if ( mNumber > 0 ) emit selectWeekNum ( mNumber ); }
};

class KNoScrollListBox: public QListBox
{
    Q_OBJECT
  public:
    KNoScrollListBox(QWidget *parent=0, const char *name=0);
    ~KNoScrollListBox();
    QString getWhatsThisText(QPoint p) ;

  signals:
    void shiftDown();
    void shiftUp();
    void rightClick();

   protected slots:
    void oneDown();
    void keyPressEvent(QKeyEvent *);
    void keyReleaseEvent(QKeyEvent *);
    void mousePressEvent(QMouseEvent *);

 private:
    KNOWhatsThis * mWT;
};


class MonthViewItem: public QListBoxItem
{
  public:
    MonthViewItem( Incidence *, QDate qd, const QString & title );

    void setRecur(bool on) { mRecur = on; }
    void setAlarm(bool on) { mAlarm = on; }
    void setReply(bool on) { mReply = on; }
    void setMoreInfo(bool on) { mInfo = on; }


    void setPalette(const QPalette &p) { mPalette = p; }
    QPalette palette() const { return mPalette; }

    Incidence *incidence() const { return mIncidence; }
    QDate incidenceDate() { return mDate; }

  protected:
    virtual void paint(QPainter *);
    virtual int height(const QListBox *) const;
    virtual int width(const QListBox *) const;

  private:
    bool mRecur;
    bool mAlarm;
    bool mReply;
    bool mInfo;

    QPalette mPalette;
    QDate mDate;

    Incidence *mIncidence;
};


class KOMonthView;

class MonthViewCell : public QWidget
{
    Q_OBJECT
  public:
    MonthViewCell(KOMonthView *,QWidget* );

    void setDate( const QDate & );
    QDate date() const;

    void setPrimary( bool );
    bool isPrimary() const;

    void setHoliday( bool );
    void setHoliday( const QString & );

    void updateCell();
    void startUpdateCell();
    void finishUpdateCell();
    void insertEvent(Event *);
    void insertTodo(Todo *);

    void updateConfig( bool bigFont = false );

    void enableScrollBars( bool );

    Incidence *selectedIncidence();
    QDate selectedIncidenceDate();

    void deselect();
    void select();
    void clear();

#ifdef DESKTOP_VERSION
    static QToolTipGroup *toolTipGroup(); 
#endif
  signals:
    void defaultAction( Incidence * );
    void newEventSignal( QDateTime );
    void showDaySignal( QDate );
    
  protected:
    QString mToolTip;
    void resizeEvent( QResizeEvent * );

  protected slots:
    void defaultAction( QListBoxItem * );
    void contextMenu( QListBoxItem * );
    void selection( QListBoxItem * );
    void cellClicked( QListBoxItem * );
    void newEvent();
    void showDay();
    
  private:
    KOMonthView *mMonthView;
  
    QDate mDate;
    bool mPrimary;
    bool mHoliday;
    QString mHolidayString;
    
    //QLabel *mLabel;
    QPushButton *mLabel;
    QListBox *mItemList;
#ifdef DESKTOP_VERSION
    static QToolTipGroup *mToolTipGroup; 
#endif 
    QSize mLabelSize;
    QSize mLabelBigSize;
    QPalette mHolidayPalette;
    QPalette mStandardPalette;
    QPalette mPrimaryPalette;
    QPalette mNonPrimaryPalette;
    void setMyPalette();
    QPalette  getPalette ();
    void keyPressEvent ( QKeyEvent * ) ;
    
};


class KOMonthView: public KOEventView
{
    Q_OBJECT
  public:
    KOMonthView(Calendar *cal, QWidget *parent = 0, const char *name = 0 );
    ~KOMonthView();

    /** Returns maximum number of days supported by the komonthview */
    virtual int maxDatesHint();

    /** Returns number of currently shown dates. */
    virtual int currentDateCount();

    /** returns the currently selected events */
    virtual QPtrList<Incidence> selectedIncidences();

    /** returns dates of the currently selected events */
    virtual DateList selectedDates();

    virtual void printPreview(CalPrinter *calPrinter,
                              const QDate &, const QDate &);
    bool isMonthView() { return true; }
    bool isUpdatePossible() { return updatePossible; }
    void setIgnoreResizeEvent( int c, int h ) {  ignoreResizeEvent = c ;ignoreResizeEventHeight = h;}

    MonthViewCell * selectedCell();
  public slots:
    virtual void updateView();
    virtual void updateConfig();
    virtual void showDates(const QDate &start, const QDate &end);
    virtual void showEvents(QPtrList<Event> eventList);

    void changeEventDisplay(Event *, int);

    void clearSelection();

    void showContextMenu( Incidence * );

    void setSelectedCell( MonthViewCell * );

  protected slots:
    void selectInternalWeekNum ( int );
    void switchView();
    void processSelectionChange();
 signals:
    void nextMonth();
    void prevMonth();
    void showNavigator( bool );
    void selectWeekNum ( int );
    void showDaySignal( QDate );
  protected:
    void resizeEvent(QResizeEvent *);
    void viewChanged();
    void updateDayLabels();

  private:
    int ignoreResizeEvent;
    int ignoreResizeEventHeight;
    int currentWeek();
    bool clPending;
    QWidgetStack * mWidStack;
    QWidget* mMonthView;
    QWidget* mWeekView;
    bool mShowWeekView;
    bool updatePossible;
    int mDaysPerWeek;
    int mNumWeeks;
    int mNumCells;
    bool mWeekStartsMonday;
    void computeLayout();
    void computeLayoutWeek();

    QPtrVector<MonthViewCell> mCells;
    QPtrVector<QLabel> mDayLabels;
    QPtrVector<KOWeekButton> mWeekLabels;
    QPtrVector<MonthViewCell> mCellsW;
    QPtrVector<QLabel> mDayLabelsW;
    QPtrVector<KOWeekButton> mWeekLabelsW;

    bool mShortDayLabelsM;
    bool mShortDayLabelsW;
    int mWidthLongDayLabel;

    QDate mStartDate;

    MonthViewCell *mSelectedCell;

    KOEventPopupMenu *mContextMenu;
    void keyPressEvent ( QKeyEvent * ) ;

};

#endif